Vacuum large-capacity electrically controlled proportional valve

Abstract

The invention discloses a vacuum large-capacity electrically controlled proportional valve. The vacuum large-capacity electrically controlled proportional valve comprises a body composed of a valve base, a middle valve seat and a guiding seat, the body is provided with a vacuum pressure cavity, the vacuum pressure cavity is internally provided with a main diaphragm, a pilot exhaust straight rod with a vacuum valve set is embedded in the main diaphragm, the guiding seat is internally provided with an adjustment channel communicating with the vacuum pressure cavity, and a pilot atmospheric channel is formed in the middle valve seat and communicates to the lower part of the main diaphragm; and the pilot exhaust straight rod is matched with the upper part of the middle valve seat to form a first vacuum breaking valve, the upper part of the vacuum valve set is matched with an upper valve inner wall in the valve base to form a second vacuum breaking valve, after external atmospheric pressureis introduced to push the first vacuum breaking valve and the second vacuum valve to be opened and closed, a straight rod embedded seat in the valve base is matched with the lower part of the pilot exhaust straight rod to form a first valve, after the first valve is opened, primary side pressure is accelerated through a subsidiary channel to form secondary side pressure, and a second valve formedin the mode that the lower part of the vacuum valve set is matched with a lower valve inner wall inside the valve base can be opened and closed synchronously.

Description

technical field [0001] The invention relates to a vacuum large-capacity electronically controlled proportional valve. Through the pilot exhaust straight rod and the vacuum valve group set inside, it further cooperates with the pilot atmospheric channel to introduce atmospheric pressure and connect the primary side pressure and the secondary side pressure. The channel and the auxiliary channel enable the pilot exhaust straight rod to adjust the vacuum strength by moving up and down, so that it can achieve the purpose of energy saving and precise adjustment. Background technique [0002] Vacuum electronically controlled proportional valves widely used in the field of automation equipment in the prior art, please refer to Figure 14 , usually with a setting hole (91) for the adsorption object, a vacuum hole (92) for connecting the vacuum pump, and a large hole (93) for adjusting the vacuum pressure. Usually, when the vacuum pump is operated, through the vacuum electronically con...

AI Technical Summary

Problems solved by technology

[0003] In the testing process of the vacuum electronic control proportional valve, the operator needs to go through a long period of accumulated experience and repeated tests to produce a good vacuum electronic control proportional valve, but the circuit in the structure of the vacuum electronic control proportional valve is also relatively complicated. The vacuum air line for testing needs to be connected to the equipment at a 90-degree angle. For the test operator, when it is impossible to connect the vacuum air line to the equipment in a straight-in-straight-out assembly method for testing, it will be consume more time and energy;

[0004] At present, if the internal circuit of the vacuum electronically controlled proportional valve in the prior art needs to be modified for the internal air pressure circuit, it will take a lot of time and money to improve it. Although the connection method of the external vacuum air pressure pipeline can be changed, there are still various The matching of the parts also needs to be tested one by one. If it is necessary to maintain the fine level of the original vacuum control, it is necessary to redesign the relevant vacuum control parts. If it is used for a vacuum electronic control proportional valve with a larger capacity application, the aforementioned Pipeline connection and parts matching will be more cumbersome

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