Some relevant considerations to avoid valve failure from column valves to disc plus resetters
Why do valves keep malfunctioning? In the whole process of design, manufacture, installation, working condition, operation and maintenance, every step should not be relaxed. How do you determine if there is a problem with the valve before it leaves the factory or after it has been fully installed? This needs to be checked by appearance inspection and certain performance tests. With the continuous development of science and technology in our country, the degree of automation of enterprise production is constantly increasing. Control valve to ensure an important part of the production process automation.
Why do valves keep malfunctioning? In the whole process of design, manufacture, installation, working condition, operation and maintenance, every step should not be relaxed. How do you determine if there is a problem with the valve before it leaves the factory or after it has been fully installed? This needs to be checked by appearance inspection and certain performance tests.
With the continuous development of science and technology in our country, the degree of automation of enterprise production is constantly increasing. Control valve to ensure an important part of the production process automation.
1. There are no trachoma, cracks and other defects on the internal and external surfaces of the valve body.
2, the valve seat and the valve body joint is firm, the valve core and the valve seat is consistent, sealing surface without defects.
3, the valve stem and spool connection is flexible and reliable, the valve stem has no bending, the thread has no damage, corrosion.
4, packing, gasket aging damage, valve opening is flexible, etc.
5, the valve body should have a nameplate, the valve body and nameplate should include: manufacturer name, valve name, nominal pressure, nominal diameter and other labels.
6. The opening and closing position of the valve during transportation shall meet the following requirements:
(a) Gate valve, globe valve, throttle valve, butterfly valve, bottom valve, regulating valve and other valves should be in the fully closed position.
(b) The plug valve and ball valve closing member shall be in the fully open position.
(c) The diaphragm valve should be in the closed position, and must not be closed too tightly to prevent damage to the diaphragm valve.
(d) The disc of the check valve shall be closed and secured.
7, spring type safety valve should have a lead seal, lever type safety valve should have a heavy hammer positioning device.
8, check valve disc or spool action should be flexible and accurate, without eccentricity, displacement or skew phenomenon.
9. The inner surface of the valve lined with rubber, enamel and plastic should be smooth and smooth, and the lining layer should be firmly combined with the matrix, without cracks, bubbles and other defects.
10. Flange sealing surface shall meet the requirements and shall not have radial scratches.
11, the valve shall not have damage, missing parts, corrosion, nameplate off and other phenomena, and the valve body shall not have dirt.
12, both ends of the valve should be protected by protective cover, handle or handwheel operation should be flexible, no stuck phenomenon.
13. The valve quality certificate shall contain the following contents:
(a) Manufacturer’s name and date of manufacture.
(b) Product name, model and specification.
(c) Nominal pressure, nominal diameter, applicable medium and applicable temperature.
(d) the standard on which the test was based, the conclusion of the test and the date of the test.
(e) Factory number, signature of the inspector and the person in charge of inspection.
From the column valve to valve plate and reset the change as early as 1998 began to research and development of new automotive air conditioning energy saving and environmental protection refrigeration compressor, Xue Liangliang is acutely aware of: to open the market gap, only in the new word work, in order to make automotive air conditioning refrigeration compressor innovation.
In the process of product technology research and development, he believes that to innovate the new automobile air conditioning compressor, it must pass the technical barrier. To this end, he carried out numerous trials and experiments, for the key difficult technical problems, he consulted the relevant experts. Through unremitting efforts, the original “column valve” to the current “valve disc plus reset” device, the cylinder of compressed gas to achieve a better seal, thereby reducing the power consumption, to achieve a better refrigeration effect. In the material, he also made adjustments to ensure the quality of the gas seal.
The original automobile air conditioning refrigeration compressor is often due to oil, gas can not be separated or separated, resulting in the loss or scrap of the compressor internal parts. After repeated practice, he solved the very complicated problem of oil and gas separation.
The utility model energy-saving and environmental protection refrigeration compressor for automobile air conditioning has the advantages of simple structure, small volume, light weight, effective volume ratio up to 95%, continuous gas transmission, no surge phenomenon, power consumption is also lower than the second and third generation refrigeration air conditioning compressor. The main feature is that it can work normally under the condition of high speed operation. Due to the bold improvement of the oil inlet device in the machine, it solves the burning situation caused by the original oil inlet, improves the refrigeration effect, and prolongs the service life of the compressor. When the speed of refrigeration air conditioning compressor reaches 3500 revolutions per minute, it keeps oil, does not burn the machine, and maintains good operation.
The new type of automobile air conditioning energy-saving and environmental protection refrigeration compressor innovates many technical indexes, such as the rolling rotary compressor using needle bearing. Now the ultra-thin plane is added at both ends of the compressor spindle, which plays a protective and stable role in the work of the compressor spindle. Slider is the best part of the compressor, the movement frequency is very high, resulting in the spring to push it easy to break, after improvement and innovation, using new spring device slider hole, prolong the service life of the spring.
Utility model automobile air conditioning energy-saving and environmental protection refrigeration compressor, very suitable for installation in Changan Star, Changan Suzuki, Tianjin Xiali, FAW Garbo, Geely and other domestic cars, which has undoubtedly played an important role in promoting the development of today’s automobile industry.
It is understood that a number of car manufacturers are negotiating with him to invest in development and production.
Post time: Aug-06-2022
