美国留学申请

美国留学申请 怎么做，你有详细的时间规划吗？虽说留学申请季明年9月份才正式开始，但准备工作必须得提前开展。收下这份详细合理的美国留学申请时间规划表，各位准留学党就能不慌不忙把名校offer揽入怀中。

美国留学申请 规划早，入读名校阻碍少

1月-3月

1. 选择学校：选校需谨慎，我们要考虑很多因素，比如地点、学费、声誉、规模、多样性等。最重要的，当然还有学校和专业排名，这方面同学们可以参考U.S. News和QS发布的美国大学排行，如果你拿不定主意，可以来咨询留学专家求真教育。

2. 标准化考试：美国留学申请的必备条件之一就是标化成绩，一般包括雅思（现在大多数美国大学都认可雅思成绩）/托福、SAT、SATII；申请研究生则需要提交托福、GRE（对申请理工科学生而言）或者GMAT成绩（对申请商科学生而言），具体要根据申请的学校和专业来定。取得理想的标化成绩是取得名校offer的重要一步。求真小编在此温馨提示：一定要提早规划，提前报名。

4月-6月

3. 自我提高：准备美国留学申请时，GPA成绩也是一个比较重要的环节，所以在校期间同学们要尽可能提高自己的GPA成绩。如果自己的标化考试成绩不理想，也可以在这段时间刷分。

另外，想要后期文书内容丰富，增强个人软性实力也十分关键。个人软实力的增强则依靠活动的规划。活动类型包括社团类、科研类、竞赛类、实习等等，能持续性、层次性地锻炼个人的综合能力。求真小编提醒：背景活动要注重质量和深度，而不是一味追求数量。

7月-8月

4.证明材料准备：对于申请美国本科生的同学来说，一般需要提供高中的成绩单。而申请研究生的同学则需要提交本科四年的成绩单。需要注意的是，部分院校的研究生项目还会要求申请者提供相应实习证明。材料准备是一个繁杂的过程，这个过程中肯定会遇到这样那样的问题。求真团队可以协助同学们进行资料准备，保证资料的完整和及时。

5.文书创作：需要准备的文书主要包括个人简历、个人陈述、小论文和推荐信。个人简历要有很强的针对性，需要能体现申请人的需要和申请目的。根据不同的美国大学要求，申请者需要提供1-5篇不等的个人陈述，推荐信则一般需要2-3封。

小编建议：最好5月份就开始文书构思，7月份前就沟通确认好至少2个学校推荐人，为7、8月专心写个人陈述和小论文留出足够时间。文书是同学们向招生官展示个人软实力的重要途径。优秀的申请文书能给招生官留下深刻的印象，增加录取成功率。求真专业团队可以提供全程一对一指导，拒绝流水线文书创作，为同学们打造最完美的文书。

9月-第二年2月

6.正式开始申请：9月正式进入美国留学申请季。要注意的是，不同学校的申请截止日期都有所不同，即使是同一所学校不同专业的也会不一样。同学们应密切关注目标院校的截止日期，切勿错过了申请时机。

另外，有一些网申小贴士要告诉大家：有固定统一截止日期的美国院校一般都是在截止日期之后才进行材料审核，即是说，无论提交早晚，都不会影响录取几率的。但一些院校的截止日期是分轮次的，比如哈佛的MBA截止日期就分3轮：第一轮9月9号，第二轮1月6号，第三轮4月4号。通常，第一轮的录取率最高。因此，建议同学们第一轮就提交申请。

https://cdn.indeededu.com/uploads/2020/01/books-768x512.jpg 768w, https://cdn.indeededu.com/uploads/2020/01/books-705x470.jpg 705w, https://cdn.indeededu.com/uploads/2020/01/books-450x300.jpg 450w, https://cdn.indeededu.com/uploads/2020/01/books.jpg 832w" sizes="(max-width: 300px) 100vw, 300px" /> 图源：Freepik

第二年3月-5月

7.后续工作：提交网申后，同学们可能会收到部分学校的面试通知，因此一定要时常跟进申请状态，避免错失面试机会。小编在这里提醒申请者要尽早进行模拟面试练习，提高自己的通过率。另外，可以及时向学校更新自己的标化成绩。如果一直没有收到院校的通知消息，同学们要及时发邮件询问院校自己的录取结果。

8.获得录取通知：如果同时收到多所院校的录取通知，同学们应该多方衡量后选择最适合自己的院校。

第二年6月-7月

9.签证申请：赴美留学需要先获得F-1签证。签证流程包括准备签证材料、预约签证。美国教育机构会给每位收到offer的F-1签证申请人提供申请签证所需的批准文件I-20。一定要核对文件上的信息是否正确，如果有误就要及时联系学校进行修改。

10.入学待办事项：录取院校的学生后台一般会给出一份新生入学的待办事项清单，同学们及时查阅学生邮箱，获取清单。要认真阅读清单，在截止日期前完成上面的内容。一般来说，入学待办事项会包括寄送原校成绩单、完成疫苗要求、提交经济保单证明等等。

一切就绪，同学们只要收拾好自己的行囊和心情就可以漂洋过海，开始自己的留学生活！

求真寄语

一场留学，一次抉择，一生改变。小编希望这份详细的时间规划表能对各位准留学党有所帮助。求真教育自2007年成立以来，已经帮助超过五千名学子实现留学名校梦。从前期咨询到后期申请，求真教育提供最贴心的一站式服务，助你取得名校offer。文章来源：https://indeededu.com

About Drilling:

1. Use special drilling tools (PDC bit or Tricone bit, drilling tool) to break up the rock in the stratum to form a well and reach the target layer, which is drilling.

In general:

The well depth within 1500 meters is shallow well.

1500-2800 meters is a medium-deep well.

2,800-4,000 meters deep well;

Over 4000 meters are ultra-deep Wells;

2. There are many types of Wells for various purposes. The common ones are general production Wells (vertical Wells) :

The hole drilled is vertical and is called a vertical well

Since the ideal vertical well does not exist, the field specifies standards such as drilling engineering.

If the following conditions are met, a straight well can be identified as qualified.

Directional wells and horizontal wells:

The method of drilling along the pre-designed borehole axis to reach the target layer is called directional drilling.

Drill with drill bits method, there are three basic parameters (drilling three elements) :

Bit pressure: the pressure applied to the bit.

Supplied by weight of drill string.

The amount of bit pressure is determined by the bit's bearing capacity, the weight the drill string can provide, the hole mass requirements, and the higher rate of penetration.

GREAT has designed different types of PDC bits for directional Wells.

High efficiency drilling, high ROP and more footage have been achieved.

At the same time, the PDC bit produced by GREAT can be repaired more frequently, which greatly saves the overall drilling cost.

Because GREAT very strict selection of high-quality raw materials steel and PDC cutters, and has a special processing technology, bit effect is also received by the customer's praise.

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Common color combinations:

I believe that many people have always thought that the wedding dress only has one color-white. Because whether in life or TV series, white dress is the most common on. But the fact is that there are many kinds of wedding dress color, and white wedding dress is not necessarily the most suitable color for us. Just like the daily color matching of clothes, it is also very important to choose the right color for your wedding dress.

Nowadays more and more color matches are available:

Generally speaking, the most common color combination is pink and purple. For many girls, pastel pink quinceanera dresses is a very common dress, which will make your skin look whiter while wearing it. It also makes you seem younger. But if only wearing pink at the wedding, it will appear more frivolous. After all, the marriage represents a very important thing, which is the signal of maturation. Wearing a pink, which is suitable for a girl, will be a little undignified. But if you mix peach and purple, it will show a different effect. Purple itself represents a solemn and deep mystery. Therefore, in ancient China, it belongs to the color only worn in the palace. Nowadays there are no taboos, but the mysterious effect of purple is still there. When it is combined with the younger peach, it can show a feeling full of femininity and appears more solemn.

Secondly, the more common wedding dress color matching is yellow and orange, both of which are warm colors. Neon yellow prom dress usually represent a warm life. Once used in the wedding, it will show different effects. It will make the whole occasion very lively. At the end of the second phase of the wedding, the couple will interact with their relatives and friends. Wearing this color amount, it will be very affinity. It will also be more effective in communication. Normal weddings are believed to be warmer and livelier. It's a good choice.

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We take several typical wedding dresses as examples to analyze the choice of wedding dresses.

1.A Line wedding dresses

A-line has always been the wedding dress style of choice for many people, which is a kind of cutting that gradually enlarges from the bottom of the hip and resembles capital letter A. It has been sought after by many brides for its concise and smooth tailoring. It is not only elegant and generous but also gives a streamlined and slender feeling. At the same time, it can conceal the problem of fat lower body, such as red a line gown.

2. Princess Ball Gown Wedding Dress

Princess dress style wedding dress is the best choice for fantasy and gorgeous wedding. It feels very grand and luxurious. Wearing it feels like being a princess, rich in noble feeling. It is the favorite of brides who like fantasy or gorgeous feeling. It can also cover up the problem of lower body obesity. It is also one of the popular wedding dress styles.

3. Mermaid Fabric Dress

Mermaid wedding dress can highlight the curvilinear beauty of women, which is suitable for proud brides. This type of wedding dress is characterized by the obvious narrow cut near the knee position to highlight the curve of the female figure, coupled with the chest to waist tailoring. Thus the bride's good figure will be perfectly displayed. Mermaid dress can also make the bride walk more graceful, more mature and elegant, which is the most curvilinear and sexy choice.

According to the materials, wire rope vibration isolator can be divided into natural rubber and synthetic rubber. Natural rubber is superior in physical and mechanical properties, while synthetic rubber is outstanding in some special properties, such as oil resistance, ageing resistance, acid and alkali resistance, ozone resistance and high-temperature resistance.

Rubber isolation mounting feet can be divided into plate type, pressure type and shear type. As far as the vibration isolation effect is concerned, the pressure type is better than the plate type, and the shear-type is better than the pressure type.

There are 40, 60 and 80 kinds of rubber isolation mounting feet according to the shore hardness. The static compression amount of rubber isolation mounting feet with different shore hardness is different under the same load condition.

Scope of application:

Vibration absorption and isolation of mechanical equipment and instruments.

Key points of design and selection: 1) the vibration isolation design elements of water pump unit shall be calculated according to the pump model and specification, speed, system quality, installation position, load value, frequency ratio requirements and other factors. The frequency ratio of vibration isolation of the water pump unit should be 2-5, and the place with high vibration isolation requirement should be taken as high value.

2) the horizontal water pump is generally equipped with rubber isolation mounting feet. When installed on the floor, it is better to use multi-layer series rubber isolation mounting feet or damping spring vibration isolators.

3) rubber vibration isolator should be used for a vertical water pump.

4) the supporting points of the vibration isolation elements shall be even, but not less than 4. The model, specification and performance of the vibration isolation elements at each supporting point of a water pump unit shall be consistent.

Key points of construction and installation:

1) the installation of water pump vibration isolation can be carried out according to the National Architectural Standard Design Atlas 95ss103 vibration isolation and installation of a vertical water pump and 98s102 vibration isolation and installation of a horizontal water pump.

2) the floor where rubber isolation mounting feet are placed shall be flat and free from ponding, so as to avoid contact with acid, alkali, organic solvent and other substances. Directly on the floor, not fixed.

3) before construction and installation, check-in time. During installation, the static compression deformation of the vibration isolation element shall not exceed the maximum allowable value.

4) if there is serious damage to the rubber isolation mounting feet and the ageing time is exceeded, it shall be replaced in time.

If you want to know wire rope anti vibration mounts and wire rope shock absorber,you can browse our web pages.

Roll forming is one of the most common sheet metal forming processes to produce continuously a large variety of profiles with a constant cross-section in the longitudinal direction at high production rates. Flexible roll forming (FRF) is a new advanced variant of the roll forming process that has been developed to produce variable cross-section profiles that are commonly used in the automotive, railway, ship construction, and building industries. In the flexible roll forming production line, the rack of each roller is a separate unit, and the motor is separately controlled by the computer. The motor drives the rollers to move laterally according to the program. By adjusting the rotation angle and position of each roller, the cross-sectional shape of the cold-formed profile is changed to create the desired shape of the profile. The remarkable features of the flexible roll forming technology are mainly reflected in: the reasonable design of the geometrical section of the profile effectively improves the bearing capacity of the structure and reduces the weight of the structure. The reasonable combination of the current flexible roll forming can produce more complicated products.

The request for production batches that are increasingly smaller, with ever-broader product families, requires the use of suitable cold roll forming machine, with high technological content and highly automated. The automatic profile can change in just a few minutes by using flexible roll forming.

We propose solutions such as:

1. Double or twin shoulder machines: automatic movement of rollers, installed on two separate sections, to vary the shape of a profile in height, width and thickness
2. Revolver machine: the rotation of one or both sections of the roll former, each bearing multiple series of cantilever shafts
3. Roll former with side-by-side and transversely mobile machines

Depending on the requirements, we also provide the technologies upstream and downstream of the roll forming process, for example, decoupling and straightening, head/tail welding, coil perforation, in-line welding, cut-to-length, in-line calendering, stacking and packing systems.

Cold forming is a new technology and new technology for metal sheet forming, material saving, energy saving, and high efficiency. By using this process, not only can high-quality steel products be produced, but also the cycle of product development can be shortened and production efficiency can be improved, thereby improving the market competitiveness of enterprises.

In recent years, cold-formed steel products have been widely used as important structural parts in many fields such as construction, automobile manufacturing, shipbuilding, electronics industry, and machinery manufacturing. Its products range from ordinary rails, doors and windows and other structural parts to special profiles made for special purposes. Cold-formed steel has better cross-sectional performance per unit weight than hot-rolled steel products and has a high surface finish and dimensional accuracy. Therefore, cold-formed steel can achieve the dual effect of saving steel and saving energy instead of hot-rolled steel.

The development of curved steel has been highly valued. It is the user's constant desire for the variety, specifications, and quality of cold-formed steel products, which has led to the rapid development of cold-bending forming technology.

On cold roll forming lines the stands are fixed on the machine basement, and if you need to replace the roll forming tooling, it is necessary to manually take down the rollers from the shafts.

If the profile change only involves a size change of the section (for example a width change), the rollers can be modified by re-positioning the C shape spacers without taking the rollers down.

The core part of the cold forming machine - the roll. It is the soul of cold forming, the design of the roll is extremely important, and the design features of the roll are as follows:

1. The average force principle of each pass of the cold-bending forming machine, the average roller of the whole line is subjected to the average force, the wear is balanced, and the service life of the roll is prolonged.
2. The material of the cold roll formingmachine adopts its wear resistance, but the specific strength and hardness are contradictory. The red hardness of C12MoV should be utilized during heat treatment, and the hardness can be achieved after two or even three times of tempering after quenching.

Extraction Efficiency and Precautions of Corn Oil Press Machine

Corn can press oil only by refining its germ. One hundred kilograms of corn can produce 20% of the corn's germ and 45% of the corn's germ. That is to say, one hundred kilograms of corn can produce 10 kilograms of germ and 10 kilograms of germ can produce less than 5 kilograms of crude oil. After the crude oil is produced, it must be refined before it can be used. That is to say, one hundred kilograms of corn oil can have 3 kilograms to 4 kilograms Kg of refined oil.

Matters needed attention

1. There is no special corn oil press.
2. To be exact, it is not corn oil press, and it can not be directly realized to squeeze oil from corn. The usual method is to extract corn germ from corn by dry method or wet method (this refers to processing method), then dry and stir fry corn germ to a certain extent, and then press oil by oil press to get corn oil. At this time, the corn oil obtained becomes industrial corn oil or crude corn oil, which is not suitable for direct consumption.
3. There is no special corn oil press, which is common to other oil presses. Only when corn germ is used to press oil, the pressure is higher than that of common oil materials.
4. Cost

Because the cost of raw materials and power are different in different places, it is difficult to accurately say a value. For ordinary corn (now there are high oil corn varieties): 100 kg of raw corn can produce about 2-2.5 kg of corn oil.

Quality Control of Culture Media for Food Microbiology

First, quality control of culture media for food microbiology in preparation:

(1) Container: the flask, plate, test tube and other equipment for preparing and repacking the culture medium shall be neutral, free of acid and alkali inhibitor residues, and the bottom of the plate shall be flat, so as to avoid the different thickness of agar and affect the drug sensitivity test results.  

(2) Ingredient source: all kinds of ingredients are reliable and do not contain substances that inhibit the growth of the target bacteria. Special requirements of the culture medium, such as glucose oxidation fermentation test (O / F test), in addition to adding glucose, can not contain other sugars, and indicators can not use alcohol solution to avoid false-positive in the O / F test. The water for medium preparation shall be distilled water.  

(3) PH value adjustment: adjust the pH value according to different requirements of the medium, and control it within ± 0.2 of the required range. It should be noted that the pH value of the medium decreased by 0.1-0.2 after autoclaving, so the pH value should be 0.1-0.2 higher than the actual need.  

(4) Sterilization: different sterilization methods shall be selected according to the different components and preparation quantity of the culture medium, so as to achieve the sterilization effect without damaging the components of the culture medium. In general, the stable medium can be sterilized under high pressure, i.e. 121 ℃ for 15 minutes, while the medium containing sugar should be sterilized at 108 ℃ to prevent the destruction of sugar. Materials that are not resistant to high heat, such as serum and milk, can be sterilized by interval sterilization.  

(5) Subpackage: determine the subpackage quantity according to the purpose and requirements of use. The plates and test tubes used for subpackage of the culture medium shall be clean and free of acid and alkali residues; when preparing the plate culture medium, the operating platform shall be level to avoid the different thickness of the agar plate and ensure aseptic operation.  

Second, quality control of culture media for food microbiology after preparation;

(1) The appearance of medium: it includes color, transparency, precipitation and coagulation. If cracks are found on the surface of the medium or it is separated from the edge of the dish, it means that the medium is dehydrated and must be discarded.  

(2) Sterility test: sterility test shall be carried out for each batch of prepared medium. The culture medium sterilized first and then repacked can be tested by sampling method. The selective culture gene contains inhibitory substances, which can inhibit many microorganisms. Therefore, 10 times of sterile liquid medium can be added to dilute the inhibitory substances in order to detect the contaminating bacteria. Even after the sterility test, check the visible colony on each plate when inoculating.  

(3) Performance test: before using each batch of newly made or newly purchased culture medium, it is necessary to take the known nature of the stock bacteria for the performance tests. According to different purposes, the medium can be divided into enrichment medium, isolation medium and identification medium.  

① Enrichment medium: inoculate a small number of bacteria that are difficult to grow, and observe the enrichment within a certain period of time. The smaller the minimum inoculation concentration that bacteria can grow, the better the performance of the enrichment medium.  

② Isolation medium: the target bacteria should grow well and the non-target bacteria should be inhibited. Generally, the inoculation amount of the target bacteria required to grow should not be too much. The better method is to adjust the test bacteria to a bacterial suspension with a turbidity of 0.5 MC and then smear it on the culture medium with a standard inoculation ring of 0.001ml to observe the growth of the colonies.  

③ Identification medium: strains with typical characteristics should be selected for the performance tests.    

Legend has it that a bride who is married in a black wedding dress will only be widowed in her life and will not divorce. The black wedding dresses represent loyalty, which means that the bride’s love for the groom will not die, and it is the determination to love one person in one life.

Black, in people's impressions, has always been a representative of sadness. But in addition to sadness, black also gives people a mysterious feeling. In fact, choosing a black wedding dress is not weird. Before the 19th century, people would not buy a white wedding dress for the wedding but wear their most beautiful clothes, often not white. It wasn't until 1840 that Queen Victoria of England wore a white silk wedding dress to marry Prince Albert, which meant that pure colors began to be popular at wedding occasions.

Black represents a firmness. What kind of bride is suitable for wearing a black wedding dress?

1. Maverick Bride

White wedding dresses are the mainstream of today's wedding dresses, and some people will choose pink, blue and so on. But few people in black will choose. The person who chooses a black wedding dress must have a personality, a maverick, and a determination to live with the groom. They don't want to be like others. They don't care about the worldly eyes. They just want to be themselves.

2. The Bride of Cold and Elegance

Black, noble with a trace of dignity, mysterious with a trace of sexy. Compared with the traditional color dress, wearing a black wedding dress must be cold and elegant, with a kind of mystery like a black swan, as if it had been secluded from the world. Only the cold and elegant bride can wear the unique charm of black.

3. The Bride Who Dares to Challenge

It takes a lot of courage to wear a sexy black cocktail dresses when the mainstream wedding dress is still white and everyone generally feels that black represents sadness. Because many people do not understand the meaning of black wedding dress, but for them, they can only understand the black wedding dress in their own cognitive range, then you need to constantly explain to them, explain that other people do not necessarily understand, may still throw a different look at you. So the bride who chooses the black wedding dress must be not afraid of the challenge.

The most important thing in choosing a short black bridesmaid dresses is to overcome our psychological and traditional stereotypes, but with the development of the times, each of us has his own personality and acceptance ability is also becoming stronger. At a wedding, a black dress will make you different.    

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Speaking of marriage, what has to be mentioned is the wedding dress. Almost every girl has a beautiful yearning for the wedding dress. It is a special feeling different from a beautiful garment, which is combined with the hope of love and happiness. When choosing a wedding dress, many girls always think that only the current mainstream- white wedding dress can be called the wedding dress. They are not aware that there are many other colors of unique wedding dress. Let's take a look at them together.

Pink wedding dress

Pink wedding dress is sweet and beautiful and full of warm and romantic atmosphere, leting people fall in love at first sight. With the texture of the yarn, it gives people a gentle and flexible feeling, and adjusts a gentle temperament in the solemnity of the wedding. The color of pink represents the sweetness of love and the beauty of the future. Choosing pink as wedding dress, the fairy's wedding is a romantic celebration.

Gold wedding dresses

Since the Song Dynasty in ancient China, yellow was the special color of the emperor. Because gold has a similar color, many people regard it as a gorgeous symbol, representing wealth and luxury. Gold is also the color of the sun, implying warmth and happiness. Therefore, choosing a noble and luxurious golden wedding dress will make the bride have a radiant charm and give people a sense of retro dignity and inviolability.

Purple sweet 16 dresses

Purple is elegant and gentle, solemn and gorgeous, which is the symbol of mature women. It is also a good choice to apply gold to wedding dress. On the wedding day, it is ingenious to use it to mark your growth. If the lady is full personality, independent, and generous, she can definitely hold the purple wedding dress. The bride will be ecstatic wearing such a  generous and luxury dress plus the color of lavender.

Blue wedding dress

Blue gives people a quiet, remote, faithful and credible feeling. Slate blue bridesmaid dresses, like the sea, can tolerate everything, which is also a reminder to the girls, to accept the unpleasant and imperfect marriage, to overcome obstacles together, to face with a positive and ordinary heart, in order to achieve a true and plain marriage. And the blue wedding dress is noble and elegant, full of romantic atmosphere, which shows entirely the charming of the bride.

Black wedding dresses

At the present time when white wedding dress is the mainstream, there are some "special brides" who break the tradition and show the taboo beauty with Gothic style black wedding dress, showing the unique sexy and fashion. The atmosphere created by bride wearing a black wedding dress can not be given by any brides who wearing white wedding dresses. In traditional marriage in China, black is not a generally accepted color, especially for wedding dress. But in this era of pursuing individuality and creativity, subverting tradition has become the theme of the times.

The sweetness of pink, the luxury of gold, the elegance of purple, the tranquility of blue or the subversion of traditional black, all give people a feeling of wide-open vision. Today, as the mainstream of white wedding dress, you girls may as well try different colors of wedding dress, I believe it will have a different taste.

4 lug wheel adapters and 5 lug wheel adapters help the vehicles with 4 lug wheels change to another 4 lug bolt pattern wheels, for example, you have the car with 4x100 wheels, but you have a new 4x114.3 wheel, and you want to install the 4x114.3 wheel on your car, then you need a 4 lug wheel adapter.

Check the lubrication condition every 50 hours after the palm kernel oil pressing machine works. The oil cup on the gearbox shall not be lack of oil. The bearing in the adjusting screw of the through pressing screw shaft of the source shall be extracted from the adjusting screw hole and filled with grease once. Dry grinding is strictly prohibited.

The lubricating parts of the palm kernel oil pressing machine shall be protected from dust and other impurities. The oil quality of the gearbox shall be checked once a year. If it is found to be deteriorated, all the oil shall be replaced.

When the press volume of palm kernel oil expander machine is reduced and the cake or oil is not normal, the screw shaft shall be pulled out to check the wear of the screw, the strip, the head and the outlet. The worn parts shall be replaced in time.

After each work, the residual cake in the machine shall be removed and the dust and oil dirt on the machine surface shall be wiped.

When it is stored for a long time after the end of the production season, it shall be maintained once, and the screw, strip and cake head shall be removed, washed, repainted and oiled, and placed in a dry place.

After oil extraction of palm kernel oil expander machine, remove the cleaning residue from the spiral shaft, and wipe the rotary port with dry cloth and cotton swab to prevent blocking.

Palm kernel oil expander machine common faults

The water content of press material is low

The squeezer's squeezer cage makes a rattle, which makes the whole squeezer vibrate;

The cake can't be lumped and broken, and it is dark brown with burnt spots;

The load current of power motor is higher than 30 A;

The oil outlet is moved to the direction of the cake outlet, and there is blue smoke at the cake outlet, the oil outlet is reduced, and the oil colour is dark brown.

If the above phenomenon lasts too long, it will cause major mechanical damage accidents. At this time, it is necessary to immediately reduce the steam pressure, increase the direct steam injection amount in the upper steam cylinder, close the discharge valve, reduce the feeding to the press cage, increase the cake thickness, and gradually reduce the load of the press, and then adjust it to make it return to normal working condition.

The moisture content of press material is too high

1. When the moisture content of the press material is high, the following phenomena will occur 1. There is little feed or even no feed, or the material rotates with the shaft;
2. The cake is loose and soft, with a lot of water vapour. When the cake comes out, it has oil. When the cake comes out, it rotates with the shaft;
3. The motor load drops and the working current is below 20 A;
4. the amount of oil is reduced, the oil is white and froth, and the oil outlet is moved toward the feed side. In case of the above situation, the indirect steam pressure shall be increased immediately and gradually to reduce the injection amount of direct steam, and some slag cake shall be added at the feeding port until the oil press returns to a normal state.

Stainless steel round tube is a hollow strip of round steel, which is widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial conveying pipelines and mechanical structural components. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in the manufacture of mechanical parts and engineering structures. Stainless steel round tube is also commonly used to produce a variety of conventional weapons, barrels, shells and so on.

Classification

Such steel tubes can be divided into two categories: stainless steel seamless steel tubes and stainless steel welded steel tubes (with seam tubes).According to the manufacturing process, there are several basic types of hot rolling, extrusion, cold drawing and cold rolling. According to the shape of the section, it can be divided into a circular tube and a special-shaped tube. A circular steel pipe is widely used, but there are also some square, rectangular, semi-circular, hexagonal, equilateral triangle, octagonal and other shaped stainless steel pipe.

For steel tubes subjected to fluid pressure, hydraulic tests are carried out to verify their pressure resistance and quality. No leakage, wetting or expansion is allowed to pass under the specified pressure. Some steel tubes are also subjected to crimping test, flare test and flattening test according to the standard or the requirements of the purchaser.

Seamless stainless steel round tube, also called stainless steel seamless tube, is made of steel ingot or solid tube blank through perforation, and then made by hot rolling, cold rolling or cold drawing. The specifications of the seamless steel pipe are expressed by the outer diameter by the wall thickness in millimeters.

The 304 stainless steel round tube is called SUS304 stainless steel tube, and the SUS304 stainless steel round tube is a stainless steel tube of American grade material. The domestic grade is equivalent to 0Cr19Ni9 stainless steel tube, usually replaced by 0Cr18Ni9. The mechanism of stainless steel rust prevention is that the alloying elements form a dense oxide film, which is insulated from oxygen and prevents further oxidation. Therefore, stainless steel is not "stainless".

Use of stainless steel tube

It is widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial pipelines and mechanical structural components. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used to produce a variety of conventional weapons, barrels, shells and so on.

WENZHOU HUASHANG STEEL CO.,LTD produces high quality stainless steel tubing for sale. Welcome to consult.