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Automatic pressure regulating controller for negative pressure system

An automatic pressure regulation and controller technology, which is applied in fluid pressure control, non-electric variable control, and electric fluid pressure control. Accuracy, stable operation and high adjustment precision

Active Publication Date: 2015-02-18
TONGYE TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the needle valve is used for pressure regulation control, and the outlet ring gap of the needle valve is adjusted manually, so the accuracy is difficult to guarantee, and remote control cannot be realized.

Method used

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  • Automatic pressure regulating controller for negative pressure system
  • Automatic pressure regulating controller for negative pressure system
  • Automatic pressure regulating controller for negative pressure system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An automatic pressure regulating controller for a negative pressure system, which mainly consists of a housing 8, an end cover 2, a push rod 10, a negative pressure cover 9, a pressure plate 5, an outer compression spring 4, an inner compression spring 7, and a compression spring Cover 11 and push rod driving mechanism 18 constitute. The fixing screw 13 on the outer circumference of the end cover is fixedly installed on one side of the housing, and the ejector rod driving mechanism is fixedly installed on the other side outside the housing. The above-mentioned negative pressure cover is fixed in the casing, and the negative pressure cover is installed in sealing contact with the inner wall of the end cover to form a pressure regulating chamber 12 . A group of exhaust holes 3 evenly distributed on the circumference are formed on the end cover. A pressure plate is axially installed inside between the negative pressure cover and the end cover, and an external compression ...

Embodiment 2

[0034] The part of the motor shaft of the stepping motor located inside the housing is radially fixed with an inner contact switch plate 22, the outer end of the inner contact switch plate protrudes outside the housing, and the outer end of the contact switch plate is fixed outside the housing Limit switches 21 on both sides of the head. In this embodiment, the contact switch board has two symmetrical outer ends extending out of the housing, and two pairs of limit switches located at the two outer ends are installed on the housing. All the other are the same as in Example 1.

[0035] The working principle of the automatic pressure regulating controller used in the negative pressure system is as follows:

[0036] The negative pressure generated by the negative pressure pump is connected with the negative pressure interface through the rubber hose, so that the negative pressure chamber of the controller is filled with negative pressure. The stepping motor in the figure is a lin...

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Abstract

The invention relates to an automatic pressure regulating controller for a negative pressure system. The controller comprises a housing, an end cover, an ejector pin, a negative pressure cover, a pressure plate, an external pressure spring, an internal pressure spring, a pressure spring pocket, and an ejector pin driving mechanism, wherein the end cover is fixedly mounted at one side of the housing; the ejector pin driving mechanism is fixedly mounted at the other side of the housing; the negative pressure cover is fixedly mounted inside the housing; a pressure regulating cavity is formed between the negative pressure cover and the inner wall of the end cover; a group of air outlets are formed in the end cover; the pressure plate is axially mounted in the part between the negative pressure cover and the end cover; the external pressure spring is axially arranged between the pressure plate and the end cover; the pressure spring pocket and the internal pressure spring are arranged between the pressure plate and the ejector pin extending into the negative pressure cover; the internal pressure spring is coaxially mounted in the pressure spring packet in a sleeving manner; the pressure plate is mounted under the elastic support of the internal and external pressure springs; the outer end of the ejector pin is connected with the ejector pin driving mechanism; a negative pressure port extending out of the housing is formed in the negative pressure cover. The automatic pressure regulating controller is high in repeatability, low in influence of the outside, accurate to control, simple and convenient to operate, and wide in application range.

Description

technical field [0001] The invention relates to a pressure system control device, in particular to an automatic pressure regulation controller for a negative pressure system. Background technique [0002] In the fields of medical treatment and chemical industry, it is often necessary to accurately adjust the pressure of the negative pressure system. For example, in the industry, a set of solenoid valves is mostly used for the pressure regulation control of the negative pressure system. By opening and closing different numbers of solenoid valves, the amount of air entering the negative pressure system is controlled to realize the adjustment of the negative pressure value. However, using a group of solenoid valves for pressure regulation control is a discontinuous operation that requires fast response speed of the solenoid valves. Therefore, the cost of the system is high and it is suitable for large-scale vacuum systems. Moreover, the solenoid valve is used to carry out the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/00G05D16/20
CPCA61M1/743G05D16/202
Inventor 殷华李凤林于春泳许广桐翟贵生
Owner TONGYE TECH DEV
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