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Mixing Modification of Elastomer——Blending Modification of SBS/SEBS
Applications of Thermoplastic Elastomer:
The English acronym of Thermoplastic Elastomer is TPE. In the Chinese market, TPE refers to SBS/SEBS blending modification materials. Because SBS/SEBS elastomer usually has high viscosity and is difficult to be directly processed, TPE thermoplastic elastomer material (TPS) is prepared by blending SBS/SEBS with plasticizer oil, reinforcing resin, compatibilizer, functional assistant, compatibilizer and so on. Compared with SBS/SEBS, the modified TPE has lower viscosity, higher plasticity, easier processing and moulding. It also has a wide range of adjustable hardness and physical properties. And it does not need vulcanization, can be recycled to reduce costs and other characteristics, so the application field is more extensive. It is mainly used in all kinds of seals, automotive interiors, glue-coated materials, all kinds of pipe fittings, wires and cables, etc.
According to different hardness requirements, SBS or SEBS blending modification adjusts the proportion of SBS/SEBS, PP, filler and filling oil. Increased rigidity of PP, SBS/SEBS and filling oil can improve flexibility.
Features of Thermoplastic Elastomer:
Design of screw barrel with large aspect ratio. Large aspect ratio L/D=48:1-52:1 provides longer residence time, which is beneficial to the melting of resins and elastomers, homogenization and mixing of filling oil and polymers.
High-precision screw and barrel design. The clearance between screw and barrel is small, the dimension accuracy is high, and the screw structure is optimized to effectively complete the mixing process of resin melting, filler dispersion and filling oil homogenization.
Cutting method. At present, the underwater granulation device at home and abroad has been continuously improved, which basically meets the requirements of different hardness, so underwater granulation is adopted.
Mixing modification of elastomer——Description of TPV dynamic vulcanization process
Applications of Thermoplastic vulcanizate:
Thermoplastic vulcanizate is referred to as TPV in short. It is a process that combines some properties of vulcanized rubber with processing properties of thermoplastic plastics. At present, the common components are PP, EPDM, filler, filler oil, crosslinking agent and processing aids. The so-called dynamic vulcanization refers to the simultaneous vulcanization (crosslinking) and melts dispersion of rubber. In the continuous phase of the vulcanized rubber phase uniformly dispersed resin, the particle size of the dispersed phase is 1-2 micron under the appropriate temperature field and shear field, which puts forward very high requirements for the blending equipment and preparation technology. TPV products are mainly used in all kinds of seals, soles, pipes, wires and cables.
Features of twin-screw extruder:
The twin-screw extruder with high speed and high torsion is adopted. High torque can withstand larger loads and adapt to the characteristics of high strength of vulcanized rubber melt; high screw speed provides a higher shear rate, which disperses vulcanized rubber into small rubber particles and evenly disperses in resin.
Screw barrel with large aspect ratio and multi-way metering feeding. Large aspect ratio L/D=48:1~52:1 provides longer residence time, which is conducive to completing the melting homogenization, vulcanization and dispersion of complex mixing process. At the same time, it is equipped with multiple groups of metering feeders to feed resin, rubber, filler, filling oil and crosslinking agent into the barrel step by step.
High-precision screw and barrel design. The clearance between screw and barrel is small, the dimension accuracy is high, and the screw structure is optimized. The melting process of resin and the homogenization process of filling oil are effectively completed, and the dynamic vulcanization process is completed by shearing and dispersing components.
Cutting method. At present, the underwater granulation device at home and abroad has been continuously improved, which basically meets the requirements of different hardness, so underwater granulation is adopted.
The above introduction is a one-step dynamic vulcanization process, which is suitable for the production conditions with stable formulation ratio. In actual production, due to the different requirements of product performance, the proportion of each component in the formulation varies greatly, and the proportion and degree of vulcanized rubber are also quite different, so the two-step dynamic vulcanization process will have stronger applicability. Two twin-screw extruder production lines:
The upper twin screw mixes PP, EPDM, filler and a small amount of filling oil evenly and granulates.
The lower-order twin-screw mixes the homogeneous polymer, most of the filling oil and crosslinking agent to complete the crosslinking of EPDM and disperse it evenly.
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Description of Dual Monitor Raising Standing Desk With Two Legs：
Two Motors Two Legged Electric Height Adjustable Standing Desk Supported by YND-03 environmental control box, it can be easily moved to the desired height by pressing a button on the controller. The button adjusts the desktop height from low enough for a child to sit too high enough for a 6’7” tall person to stand—a full 25.5 inches of sitting-kneeling-leaning-lunging-twisting-playing room. And it is a classic sit to stand desk model. We call it the standing desk, but you can also call it the sitting desk, the tilting desk, the stretching desk, even the walking desk. Your desk gets you moving. Not only good for your health, but it also gives you energy, making you more alert and engaged throughout the day.
Desktop Mix:
Whiteboard is our first thought, also be the collocation plan that likes most. Because there's nothing like standing on a whiteboard to capture our minimalist culture.Such accord with our sitting and standing desk concise and the characteristic of muti_function.Of course, this is also very suitable for painting children, can let them create aesthetically on the desktop.
we use sustainable bamboo for desktop, do not use pesticides and fertilizers, its beautiful color comes from the kiln, not from any chemical dyes or stains.
Laminates are waterproof and scratch resistant. The main component is heavy, high density particleboard. It's made from 100% recycled wood fiber before consumption -- this allows for more durability and dirt resistance, allowing you to maintain a professional look after a full day's work.
Medium density fiberboard on the top is a good choice. It has the function of fire prevention, heat prevention and scratch prevention, and is made by powder pressing, strong and durable.
And if you need to customize your own requirements, you can also feel free to let us know.For example, if you want to buy desk for office, you can order motorized computer desk.
Features of Dual Monitor Raising Standing Desk With Two Legs
Colour: White, Black, Grey
Input Voltage: 110-230VAC
Adjustable Height Range: 700-1200mm
Max.Speed: 20mm/s
Load Capacity: 1400N
Remote Control: Yes
Surface Treatment: Surface Coating
Tube Size: 80*50mm(customize)
Transverse Expansion Range: 1100-1600mm
Low Power: Yes
Anti-Collision: Yes
Duty Cycle: 10%;Max.2min.off
Impulse refers to the welding current waveform is discontinuous, current size changes.
Generally speaking, pulse type spot welder refers to the sinusoidal alternating current is SCR, divided into sections of current, commonly known as pulse welder. In other words, pulse mode of operation refers to the mode of operating only once every certain interval.
At present, single pulse and double pulse are mostly used in welding.
Conventional pulse gas welding: only one pulse. All the peaks of a monopulse are the same like NNNNN. Pulse gas welding machine is the use of pulse current to achieve droplet transition welding mode, no splash, deep penetration, fine grain, high weld strength, suitable for all-position welding, from 20 a to 500A can achieve stable quality welding, welding performance is far better than the ordinary gas welding machine, is the mainstream direction of welding machine development. Double pulses are equivalent to the superposition of two single pulses with the same period and different phases. In other words, one period may have two peaks: nNnNnN.
Double pulse gas shielded welding is a welding method developed on the basis of pulse gas shielded welding. It is a welding method with alternating changes of two pulse gas shielded welding methods with different current sizes. It is mainly used in the welding of aluminum alloy, and it can produce the effect of fish-scale pattern without swing, similar to the effect of ac TIG welding. In addition, this welding method can effectively control the heat input, which is similar to the pulsed argon arc. It can be fully welded without penetration, and is suitable for all metal welding. It is an advanced welding method.
Application advantages of impulse welding:
There is no spatter in the welding process, the heat affected area is small, especially for the thin plate welding has obvious advantages, the consistency of energy waveform output can be guaranteed from beginning to end, and the fusion depth and weld pile height are fully consistent. Double pulse can be used for welding aluminum alloy and stainless steel. No spatter during welding, easy to operate, suitable for manual and automatic welding, arc stability, adjustable depth, beautiful shape, less porosity, excellent mechanical properties and other characteristics! It is widely used in aluminum alloy, steel ship, locomotive, automobile parts, automobile manufacturing, aerospace, colleges and research institutions, heavy industry machinery, pipe making, steel structure, coal mining machinery, etc.
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As an important part of the operation of the car, the belt is connected to various parts. Once it breaks or slips, the related air-conditioning compressor, power steering oil pump, alternator, etc. will be adversely affected. Therefore, it is very important to master the identification method of the automobile belt, and it is also important to know the replacement cycle of the belt. The following are some methods for identifying the quality of automobile belts and determining whether the belt is damaged.
How to identify the advantages and disadvantages of automobile belts?
True: No odor
False: There is a pungent smell of smelly gum.
Smelling is the first step in the identification of the advantages and disadvantages of automotive belts, and it is also a relatively effective trick. Often inferior rubber products will have a pungent smell of gum. The car owner can distinguish it with just a little attention.
For the same reasons as above, counterfeit products usually make a fuss about materials and processes in order to save costs. The products produced are generally rough, and the printed fonts are relatively vague.
A repair shop or store that sells counterfeit and inferior belt products will usually have the same specifications but several prices. It is recommended to make a careful comparison of these products with different prices before choosing.
Suggestion: The best way to deal with counterfeit and shoddy products is to choose regular purchase channels. The genuine parts of most automotive belt manufacturers are only sold through regular companies to distinguish counterfeit and shoddy goods from the gray market. Genuine products are not sold through unauthorized distribution channels. Therefore, it is best to choose the corresponding regular store when replacing the car belt.
SHANJING auto parts limited sells a variety of auto parts, special car conveyor belts with preferential prices and high quality. Welcome to buy.
Classification of Equipment Grounding
Earthing refers to the connection between neutral points of power system and electrical devices, exposed conductive part of electrical equipment and outer conductive part of equipment. Equipment grounding can be divided into working grounding, lightning protection grounding and protective grounding.
Protective grounding is designed to prevent equipment from being charged due to insulation damage which endangers personal safety, such as metal enclosures, reinforced concrete poles and metal poles and towers of power equipment. Protective grounding can only have current when the insulation of the equipment is damaged, and its value can be changed in a large range.
Function of Equipment Grounding
In order to protect the safety of human body, a good metal connection is made between the non-electrified metal part of electrical equipment and the grounding electrode under normal conditions. For electrical equipment with grounding devices, when insulation is damaged and the housing is charged, the grounding current will flow along both the grounding electrode and the human body.
The current flowing through each path will be inversely proportional to its resistance. The smaller the resistance of the grounding pole, the smaller the current flowing through the human body. When the grounding resistance is very small, the current flowing through the human body tends to be zero. The human body therefore avoids the danger of electric shock. Therefore, in any case, the grounding resistance should be guaranteed not to exceed the grounding resistance specified in the design or regulation.
2.Guarantee the Normal Operation of Electrical System
The grounding of power system is generally neutral point grounding, so the potential between neutral point and ground is close to zero. When the phase line touches the shell or grounding, the other two relative ground voltages will rise to twice the phase voltage in the neutral point insulation system. In neutral grounded systems, it is close to the phase voltage. Because of the neutral grounding wire, the reliability of relay protection can be guaranteed.
DC power supply in communication system usually adopts positive grounding, which can prevent noise from entering and ensure the normal operation of communication equipment.
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In fact, the ground resistance is the criterion to determine whether the grounding rod is in a level state after it is connected to the ground, and the ground resistance contacted varies with the depth of the grounding rod. Generally speaking, the length of the grounding rod should not be less than 240 centimeters, that is, 240 centimeters. Moreover, most importantly, unless there is a proper protective device at the top of the grounding rod, the upper end of the grounding rod should be horizontal or lower than the ground. If you want to reduce the ground resistance when grounding, you need to use a longer grounding rod or use more than two grounding rods. If the latter is chosen, the distance between the grounding rod and the grounding rod should not be less than 180 cm.
But traditionally, the grounding rods of electric power and other electrical appliances are 2-2.5m. Basically, it is one dozen. It is suggested that the 2.5 inch pipe be used to sharpen the head into the soil with more moisture. According to probability statistics, the Pearl River Delta can basically satisfy the value of 4-5 Euros.
In summary, the grounding rod should be buried underground in general, so the depth of the grounding rod buried underground depends on the overall length of the grounding rod.
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Copper clad steel is the most suitable new grounding material. Compared with traditional grounding materials, it has advantages in the following aspects: corrosion resistance; conductivity; construction difficulty; welding reliability. This paper mainly introduces corrosion resistance and conductivity.
Corrosion resistance of Copper clad steel
The corrosion resistance of grounding body directly determines the service life of substation grounding network. There are two main forms of corrosion of grounding body: surface corrosion and pitting corrosion. Surface corrosion refers to uniform corrosion, which is related to the material and soil corrosion performance of grounding body, and its speed is relatively stable. Point corrosion mainly exists in joints and other parts which are prone to electrochemical corrosion. The rate of point corrosion is 4 to 60 times that of uniform corrosion, which is the main form of corrosion threatening the safety of grounding grid.
The anti-corrosion ability of steel itself is very poor. The steel grounding body is mainly protected by external galvanizing. If there is insufficient protection for the damaged plating such as welding points in the construction process, it is very easy to form point corrosion. Steel grounding grids in substations usually need to be transformed and replaced in ten years, and seldom work steadily for fifteen years. It is useless to increase the cross section of grounding pole by a large margin, because the pitting corrosion speed is too fast, and it is easy to erode and break the horizontal grounding network.
The corrosion rate of copper grounding body in soil is about 1/10-1/50 of steel. The corrosion product of copper material is basic copper carbonate, which will be adsorbed tightly on the surface of copper material to prevent further corrosion and to protect copper material from pitting corrosion. When the coating is reasonable, the corrosion resistance of copper clad steel is equivalent to that of copper. Copper or copper-plated steel grounding grids can operate stably for up to 50 years.
Conductivity of Copper clad steel
The conductivity of grounding material directly affects the power frequency resistance and impact resistance of substation grounding network. According to the International Annealed Copper Standard (IACS), the conductivity of standard copper is 100%, that of standard steel is only 10.8%, and that of copper is about 10 times that of steel. According to the thickness of the coating, the conductivity of the copper clad steel earth rod is about 20%-40%, which is much better than that of the steel grounding rod. In the case of high frequency lightning current impact, the skin effect of conductor is more obvious, and the high frequency conductivity of copper clad steel grounding material is more advantageous than that of steel grounding material.
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Isaiah 40:31But they that wait upon the Lord shall renew their strength; they shall mount up with wings as eagles; they shall run, and not be weary; they shall walk, and not faint.
Be encouraged; God is near and He is our strength when we are weak.
Currently, the surgical stapler suture used in clinical practice is fast, easy to operate and has no rejection reaction to the tissue. They improve tissue receptivity to staples with fewer side effects, effectively reducing patient pain and increasing surgeon efficiency and surgical success. Due to these advantages, now, the stapler is widely used in a variety of surgical procedures.
With the increase in the number of surgical procedures, the widespread use of minimally invasive surgery, and the gradual improvement of medical infrastructure, the global medical and surgical instruments market is growing at a rapid rate. The market shows a steady growth trend. With the continuous growth of China's economic strength, the medical level of the population and the deepening of medical reform, the ability of China's residents to pay for medical services is also increasing. Currently, there is a clear trend toward an aging population in the country and beyond, and against the backdrop of an increasing number of people suffering from cardiovascular and cerebrovascular disease, cancer and diabetes, the use of stapler among surgeons and patients at home and abroad continues to grow at a rate higher than the global average.
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受到全球疫情影响，美国线上项目已经成为许多美国顶尖大学申请者展示自身能力的重要途径。美国大学申请看重学生的综合能力，而不仅仅是学生的GPA和标化考试成绩。这样的政策为申请者在文书和软性背景提升方面有更大的发挥空间。求真教育何老师结合S同学的申请成功案例，为大家讲解我们该如何利用美国线上项目，在申请季实现华丽的弯道超车，一举实现自己的美国大学名校梦。
如果说学生的GPA、托福和SAT考试成绩是美国大学申请的基本门槛，软性背景则能够为同学们的申请锦上添花。像加州大学在申请时会要求学生提供高中阶段所参加过的志愿者活动、竞赛、科研、夏校和社团活动等课外活动清单，并且描述自己的感受和收获。而像美国的八所常青藤大学，每年收到的申请者当中，托福115+，SAT1500+的比比皆是。此时，决定学生是否能被录取的关键便是学生在课外活动中所体现的个人特质。当然，背景提升虽然非常重要，但主要目的是为了锦上添花，而不是雪中送炭。所以对于基础比较差的学生来说，先把自己的标化成绩提升至合理的区间会是更加明智的选择。
优秀申请者的背景提升往往都是注重活动的长度和深度。长度强调学生坚持参加活动，而深度强调学生要从活动中有所领悟，从而在文书中体现自己的个人特质，比如领导力、创造力、团队合作能力等等。优秀的背景提升活动能够为文书提供大量素材，能够全方位展示申请者对学校、专业的理解，好的背景提升活动一定能够锦上添花。
S同学是广州一所重点高中国际部的学生，为人乐观开朗，非常健谈。她非常喜欢动手参与科学实验，曾经在校级和省级生物比赛中获奖。但S同学成绩不是特别理想，尤其是在文科科目中有一些偏科。在和求真教育老师们交流后，我们决定为S同学安排名校线上科研实验室项目，并且安排专业老师和S同学进行头脑风暴，并且润色和打磨S同学的文书框架，最大化突出她的个人特点。同时，求真老师们安排专业的学术辅导团队为S同学重点提高文科成绩。S同学在美国线上项目中表现优异，并且和导师的沟通十分顺畅，最终获得美国线上项目推荐信。
正是因为这次独特的美国线上项目经历和拿到教授推荐信的喜悦，增加了S同学的信心，S同学在后面的学习中奋发图强，成功把自己的GPA提升到3.88，并且托福和SAT分别拿到了98分和1430分的优异成绩。加上求真美籍老师们在文书当中的帮助，让S同学的领导特性和动手能力得到最大的体现。最终S同学如愿得到了加州大学戴维斯的录取，S同学喜极而泣。一年前GPA不到70分，托福不到80分的他，远远没想到自己能进入梦校继续自己的学业生涯。
很多同学认为美国大学申请跟高考申请大学一样：只需要递交好自己的成绩，成绩越高，拿到的学校录取排名就会越好。但现实中的美国大学绝不是这样的。求真老师们就遇到SAT高分的学生最终申请结果平平。因此在前期规划时，我们要了解清楚自己的兴趣，提前查询好心仪学校的录取标准和往年录取学生的反馈。在此基础上，我们要准备好适合自己的顶级美国线上项目，并且为之不断努力，让自己实现质的飞跃。求真教育提供顶级FIRA机器人世界杯竞赛、编程比赛等培训，让你不出门，在家轻松备战！
美国线上项目是学生背景提升的重要一环，同学们一定要重视起来，不能只停留在准备标化成绩阶段。求真教育拥有10年以上线上背景提升经验，上千加顶级项目助你实现美国大学弯道超车，实现你的名校录取梦想。文章来源:https://indeededu.com
由于疫情的发展，今年准备申请的同学没有办法正常开展校园和校外的各项活动，为了把握好这段时间，继续提高自己，美国线上背景提升是个不错的选择。背景提升的重要性想必已经不必多说，除了三维成绩之外，软实力就是最主要的实力评判标准。做各类背景提升的目的，也不仅仅是为了申请到更好的学校，在做任何事情的过程中，经验和知识的积累也会对之后的学习和工作有利。
背景提升的方式是多种多样的，大到长时间的实习和科研经历，小到参加学术会议、志愿活动、比赛经历等等。本文就为大家推荐一些疫情期间，在家就能完成的美国线上背景提升的方法。
求真教育最近收到很多同学的咨询，问道：现在很多学校的SAT考试改成了选择性提交，是不是就不用准备了呢？
关于这点，答案是否定的。首先我们来了解下本科申请的时间线，一般申请秋季入学的本科学生，学校接受最晚一次SAT成绩是12年级时12月份的那次考试，也就是说距离现在还有大半年的时间。这段时间里，没有人能准确预测疫情会如何发展，如果一段时间后，SAT等考试恢复正常，再开始准备就来不及了。其次，现在很多标准化考试已经改成了线上模式，很难说SAT考试会不会跟上。如果是这样，还是有很多学生会选择去考，那没有SAT成绩的同学，竞争力明显就下降了。当然，备考全靠自觉，线上形式的补习班也有很多，希望大家理性选择，努力充实自己。
暑期学校分为三种，一种是提供给高中在读学生，一种是提供给高中即将毕业、已经被学校录取的学生，一种是提供给几乎所有符合条件的学生，我们一个一个来说。
第一种是常规的暑期学校项目，比较著名的像耶鲁大学的 Yale Young Global Scholars Program (YYGS)。这类项目需要提前半年左右就进行申请，含金量高的同时难度也较高，通常到学校开展2周左右的课程。不过这一类暑期项目收疫情影响很大，大使馆关闭、航班取消、学校改成网课等等因素都使得项目无法正常地开展学术活动，很有可能今年的暑期学校会被推迟或者取消。
第二种是提供给本科新生的过度课程，如果学生想要在正常秋季开学前，提前适应学校环境、熟悉老师和同学、感受大学上课模式，就可以报名参加学校的夏季过度课程。拿加州大学尔湾分校举例，学校给新生提供两类过度课程：Freshman Edge 和 Freshman Edge International，学生可以根据自己的情况进行选择。并且学校刚刚发布最近消息，这两个项目都已经改成线上模式，不会受到疫情影响。
第三种是学校面向全社会开放的线上大学课程，比较有名的像 UCLA Extension，各年龄段各种学历的人都可以申请上课，并且里面所有的课程都是通过 UCLA 认证的，可以转换成大学学分。这类网课种类非常丰富，语言课程、大学基础课程、专业基础课程等等都有提供。大家可以根据自己的情况进行选择。
这次的疫情是全世界共同面临地挑战，虽然大家可能都在居家隔离，但了解最新的咨询还是非常必要的，甚至有能力的人，可以通过实际行动为社区贡献自己的力量。有人把家里多余的医用口罩捐献给一线人员，有人通过拍摄Vlog把最真实的隔离生活展现给大家，有人收集各类疫情咨询实时发布更新，这些都是可以创造和实现自己价值的地方，等到申请的时候，也会变成独特的文书素材。
看了文章后，希望大家赶紧行动起来，虽然隔离在家，也不要荒废了宝贵的申请准备时光，通过美国线上背景提升丰富自己的课余生活！文章来源：https://indeededu.com
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Nondestructive testing can determine the physical properties of materials, such as ductility, tensile strength and fracture toughness. We usually use non-destructive testing to determine the reliability and integrity of the product in order to control the whole manufacturing process. In addition, the government's safety regulations are increasingly stringent in terms of quality control, reliability and safety of machine performance, while manufacturers'demand for improving machine quality and life is also increasing. These are the main factors contributing to the development of the global nondestructive testing equipment market. However, compared with the rapid development of equipment market, the lack of non-destructive professional and technical personnel is a difficult problem that we have to solve urgently.
The global inspections ndt equipment market is subdivided according to various nondestructive testing technologies, which are divided into ultrasonic testing, radiation testing, electromagnetic testing, visual testing and other testing technologies (including magnetic particle testing and penetration testing). Ultrasound testing equipment occupies a dominant position in the market. The main factor driving the growth of ultrasonic testing equipment market is its wide application in steel and aluminium materials, construction, manufacturing, aerospace, national defense and automotive industries.
According to the region, North America dominates the global inspections ndtequipment market, accounting for about 35.77% of the total market share. Large investments in energy industries such as oil and gas are the main drivers of North American market growth. At the same time, Europe's equipment market is the second largest in the world, and its demand for global inspections ndtequipment will also be further enhanced in our future forecast stage. The demand for modernization of oil and gas and power generation industry is the main factor to promote the development of European market. The automotive industry is likely to make a significant contribution to Europe's future equipment market. And we expect the Asia-Pacific region to be the fastest growing region by 2021.
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Ultrasound flaw detection is a method to inspect the defect of a part by means of the reflection characteristics of the interface edge when the ultrasonic energy penetrates into the depth of the metal material and one section enters another section. When the ultrasonic beam passes from the surface of the part to the inside of the metal from the probe, the reflected waves will occur separately when the defect and the bottom of the part are encountered. Pulse waveforms are formed on the fluorescent screen, and the position and size of defects are judged according to these pulse waveforms. Eddy current detection is to use the principle of electromagnetic induction to excite the probe coil with the sinusoidal current. When the probe approaches the metal surface, the alternating magnetic field around the coil generates induced current on the metal surface. For flat metal, the flow direction of the induced current is a circle with concentric coils, similar to a vortex, called eddy current. At the same time, the eddy current also produces the same frequency magnetic field, which is opposite to the coil magnetic field.
The loss resistance of the eddy current channel and the reverse flux produced by the eddy current are reflected in the probe coil, which changes the current size and phase of the coil, that is, the impedance of the coil. Therefore, when the probe moves on the metal surface and encounters defects or changes in material and size, the eddy current magnetic field reacts differently to the coil, causing the coil impedance to change. By measuring the variation with the eddy current testing instrument, the defect on the metal surface or other changes in physical properties can be identified.
There are many factors affecting the eddy current field, such as the coupling degree between the probe coil and the tested material, the shape and size of the material, conductivity, permeability, and defects, etc. Therefore, the eddy current principle can be used to solve the problems of metal material flaw detection, thickness measurement and sorting.
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Women's jeans can be said to be a star that never fades all year round. There are more and more fabrics and colors of jeans. For example, straight pants and micro-flare pants can make women with thick legs look slim and slender, and tight pants can make fat women slim, and thin women become sexy, and so on. The version has also evolved from the earliest straight to slim, small feet, small straight, hakama, leisure, business, Siamese, retro, speakers, and other new types.
Some styles of women's jeans:
The pants are completely straight.
The trouser legs are like a horn, the ends are quite big.
Jeans with a low waistline.
Also called little feet jeans, because the end of the trousers is relatively small.
Buy ladies jeans online:
Women's jeans cleaning and maintenance:
Try to wash it once every 6-12 months. If you sweat a lot in summer, you can hang your jeans in a ventilated place, spray some clean water, and let it dry in the wind.
Try not to use machine washing or dry cleaning when cleaning for the first time. It is best to wear it on your body to clean it. This way of washing jeans will make the jeans more conform to your legs and the effect will be better.
Before washing jeans, you must do some basic color preservation treatment, otherwise, jeans will soon wash white. Before washing, dip the jeans in a basin with water, then put two spoons of white vinegar.
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The glass fiber continuous filter cloth is composed of continuous glass fiber yarns for both warp and weft yarns. The specially processed and manufactured glass fiber fabric is an ideal high-temperature resistant filter material. The filter material has strong strength, smooth surface, and easy to peel off dust. Temperature can be used at 280 degrees for a long time, corrosion resistance, high dust removal efficiency. Widely used in carbon black / iron / cement / calcium carbide / electrochemical / steel and other industries.
High Temperature Fiberglass Filter Bag performance:
Good heat resistance, long-term use below 280°C;
Good dust stripping, so that the energy consumption of cleaning is low;
Good dimensional stability, the shrinkage of the fiber itself is zero at the use temperature;
Good resistance to chemical attack, except hydrofluoric acid, strong acid, and strong alkali, it is stable to other media;
No water absorption, no moisture absorption;
The filtration efficiency can reach 99.5% or more.
Dust removal frame, also known as dust bag cage, is an indispensable accessory for bag filter, used as a frame of bag supporting cages. It can be compatible with six, eight, ten, twelve, sixteen, eighteen, two Ten or twenty-four tendons. The skeleton is the "rib" of the baghouse filter cages, and it is formed by a special welding equipment. Dust collector bags and cages are widely used in metallurgy, chemical industry, coking, power generation, non-ferrous metallurgy, steel, building materials, coal mines and other industries.
Hebei Ou Tai Environmental Protection Equipment Co., Ltd. is located in Botou City, a famous "dust-removing hometown".Our company produce baghouse cages,warmly welcome Chinese and foreign customers to call or letter us for business negotiations!
Dust collector bag is the heart of a bag filter and is generally called a filter dust bag, dust collection bag. The dust collector bag is a key part of the operation of the bag filter. Usually, the air filter bag is suspended vertically in the dust collector. It is a dust removal device that uses a bag filter element made of a fiber braid to trap solid particles in a dust-containing gas. The principle of action is that the dust particles are intercepted by the collision of the fibers with the inertial force of the filter cloth fibers.
The industrial dust collector bags is suitable for capturing fine, dry non-fibrous dust. The filter bag is made of textile filter cloth or non-woven felt. It uses the filtering action of the fiber fabric to filter the dust-laden gas. When the dust-laden gas enters the bag filter, the dust with large particles and large gravity settles due to gravity. When it falls down into the ash hopper and the gas containing fine dust passes through the filter, the dust is trapped and the gas is purified. Looking for dust bag manufacturer in China, Senotay is your best choice.
Application Field: Works With
Gear Ratio: 61:1 | Output Torque: 6.5KN.m |
Tilting Moment Torque: 21.3KN.m | Holding Torque: 36KN.m |
Static Axial Rating: 415.7KN | Static Radial Rating: 135KN |
Dynamic Axial Rating: 81KN | Dynamic Radial Rating: 71KN |
Precision: ≤0.15° | Weight: 55KG |
The Single-Row Ball type Slewing Ring have four points with one row. They could bear axial load, radial load and tilting moment at the same time. And they are composed of two seat rings, which design in compact structure and light weight, steel ball contact with the circular raceway at four points. There are three types of this kind of single row 4 points contact ball slewing bearing: without gear bearing (non tooth), external crane slewing gear bearing (external tooth), and Internal gear bearing (internal tooth).
Cleverly Change the Lower Bearing of the Tower Crane Slewing
Cleverly change the lower bearing of the tower crane slewing:
Slew drive can also be called slew drive gearbox. Most of our slewing ring drive is kind of worm gear reducer. And the slew ring bearing is a gear drive part.
The slewing drive is a full-cycle rotary reduction transmission mechanism integrated with a driving power source. As a professional slew drive manufacturer, Fuyong Intelligent produces high-quality slewing ring drive products! Any inquiry is welcome!
It should be noted that the timing belt is not the only rubber material. Some models use a metal chain for the timing belt, which is the timing chain in our mouth. The replacement cycle between them must be different. Generally speaking, the replacement cycle of the timing chain is longer than that of the timing belt, and the replacement cost will be higher.
Timing chain
Even if they are all timing belts, the replacement cycle will vary from model to model. Usually the car timing belt replacement cycle is around 60,000 kilometers, and the general timing chain is free of replacement, and a few need to be replaced is also more than 100,000 kilometers. However, the specific time is subject to the calibration cycle of each model. The car owners can check it through their car maintenance manual.
Timing belt
Of course, the specific replacement cycle not only needs to refer to the replacement requirements of the vehicle model, but also needs to be adjusted according to your driving habits and maintenance habits. In addition, when the timing belt needs to be replaced, the related accessories will also be replaced together. Unless serious quality problems occur, the accessories will need to be replaced together when the timing belt is replaced.
When changing the engine belt, be sure to align the timing before removing the timing belt. Only when the timing is correct can the tensioner be removed. Only then can the belt be removed. Try not to get the mark wrong when installing the belt. After installing the belt, use a wrench to turn the crankshaft twice, and then look at the mark. If the mark is correct, install other things on the top. Now most cars are easy to top the valve, so the timing mark must be correct. Replace on time according to the requirements of the user manual.
If you feel that you can't solve it, you can go directly to the repair shop to get the , and you must choose a regular repair shop. Because the small repair shop does not have any quality assurance, it may also lead to consumers being deceived.
