Automatic vent valve for hydraulic system
An automatic exhaust valve and hydraulic system technology, which is applied to fluid pressure actuated system components, fluid pressure actuated devices, mechanical equipment, etc., can solve the problems of hydraulic system safety hazards, operators forgetting or ignoring, etc., and achieve high safety performance, reliability, and avoidance of adverse effects
Inactive Publication Date: 2013-06-26
ZHEJIANG UNIV
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AI Technical Summary
Problems solved by technology
Manual exhaust valves are generally small in size and cheap in price, but manual operation is likely to cause operators to forget or ignore
Because the appearance of free air in the hydraulic system will bring serious safety hazards to the hydraulic system, especially in those occasions where it is difficult for manpower to enter during the work process, the demand for components that can automatically discharge the free air of the hydraulic system is put forward
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[0012] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0013] As shown in the drawings, the present invention includes two valve bodies 1, 14, two O-rings 2, 13, two filter screens 3, 12, two rubber rings 4, 8, and two cages 5, 11 , spring 6, piston 7, orifice plate 10;
[0014] There is a stepped hole in the center of the first valve body 1, and the first filter screen 3 is installed in the small stepped hole, and the first filter screen 3 is installed in turn toward the large hole of the stepped hole and the first cage 5 is installed on the outer cylinder of the first cage 5. The first rubber ring 4 on the surface and the piston 7 with one end pressed on the side of the first rubber ring 4, the spring 6 is housed in the hole of the piston 7, the small cylinder at the inlet end of the first valve body 1 has an external thread, and the bottom end of the thread is equipped with the first One O-ring...
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The invention discloses an automatic vent valve for a hydraulic system. A first valve body is provided with a step hole, a first filter screen is mounted in a small hole; facing to a big hole, the first filter screen is sequentially equipped with a first retainer, a first rubber ring mounted on the external cylindrical surface of the first retainer and a piston with one end pressed on the side face of the first rubber ring, a spring is mounted in a piston hole; a second valve body is provided with a step hole, a second filter screen is mounted in a small hole; facing to the big hole, the second filter screen is sequentially equipped with a throttling hole plate, a second O-shaped seal ring mounted on the groove surface out of the hole plate, the hole plate is mounted in the big hole of a second retainer, the second retainer is mounted in the big hole, the small end of the second retainer is sleeved in a spring hole, and a second rubber ring mounted on the external cylindrical surface of the second retainer; and two valve bodies are fixedly connected into a whole. Without manual operation, the automatic vent valve for the hydraulic system in the invention can automatically discharge free air or other gases in a pressurization oil box or an air cylinder in the hydraulic system without oil leakage, thereby avoiding the bad influence to the hydraulic system from the free air.
Description
technical field [0001] The invention relates to an automatic exhaust valve, in particular to an automatic exhaust valve used in a hydraulic system. Background technique [0002] The gas in the oil of the hydraulic system may have a serious impact on the working process of the hydraulic system, and the oil in the hydraulic system will inevitably be mixed with air or other gases. Therefore, it is necessary to find a way to discharge these gases from the hydraulic system. way. There are two main types of gas in the hydraulic system, the first is the gas dissolved in the oil, and the second is the free air in the system. The current exhaust valve of this hydraulic system also has two types of valves for these two conditions: one is used to eliminate the air dissolved in the oil; the other is manually operated to discharge free air. Manual exhaust valves are generally small in size and cheap in price, but manual operation is likely to cause operators to forget or ignore them. ...
Claims
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IPC IPC(8): F15B21/04
Inventor 欧阳小平黄兆东
Owner ZHEJIANG UNIV