Unloading type liquid-control hydraulic break valve and its opening method

A globe valve, hydraulic technology, applied in the device for pressure relief on the sealing surface, lift valve, valve details, etc., can solve the problem of frequency and reliability, large pressure difference between front and rear oil ports, and shear deformation of the sealing ring. and other problems to achieve the effect of improving reliability and service life, facilitating automatic control, and ensuring reasonable values

Inactive Publication Date: 2009-02-18
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]In engineering practice, there are many occasions that require the hydraulic passage to be both conductive and reliable, and the two states are often switched, but the use of manual hydraulic shut-off valves is often serious. It greatly affects the frequency and reliability of this conversion, hinders the automation level of the equipment, and the performance of cutting off the oil circuit is not ideal due to the structure of the existing stop valve
In addition, in the prior art, when the valve port is closed, the pressure difference between the front and rear oil ports is usually very large. If the valve port is opened directly, this pressure difference will cause shear deformation of the sealing ring during the opening process of the valve port, making the sealing ring very Fast failure

Method used

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  • Unloading type liquid-control hydraulic break valve and its opening method
  • Unloading type liquid-control hydraulic break valve and its opening method
  • Unloading type liquid-control hydraulic break valve and its opening method

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Embodiment 1

[0032] With reference to accompanying drawing 1-5, the concrete implementation process of the present invention is described as follows:

[0033] Figure 1 is the main view, figure 2 for the left view, image 3 is a top view, where 1 is the left end cover, through figure 2 The shown bolts are tightly connected with the valve body 13; 2 is the first end face seal ring, 5 is the second end face seal ring, the first end face seal ring 2 is fixed on the left end cover 1 through the pressure ring 4; the second end face seal ring 5 It is fixed on the plunger 11 through the pressure cap 6; 3 is a static sealing ring; Part of the plug rod fits; 10 is a column pin, one end of which is installed in the pin hole of the sliding sleeve 9, and the other end is inserted in the keyway of the plunger rod part of the plunger 11; 14 is the right end cover, similarly, through the bolt and the valve body 13 Fasten the connection.

[0034] Comparing with Figure 1, A and B in the figure are the...

Embodiment 2

[0037] Embodiment 2 Hydraulic cut-off valve opening method

[0038] One of the characteristics of the present invention is to unload first and then open the main oil circuit. In addition to the above-mentioned method of integrating the unloading functional element and the switch element, it is also possible to install a hydraulic cylinder somewhere in the controlled high-pressure chamber or use other volume intervention methods to unload. As shown in Figure 7, E is the controlled high-pressure chamber; G is the stop valve; H is the plunger cylinder; F is the connecting oil circuit. When opening the main oil passage, first move the plunger of the plunger cylinder to the right to expand the volume of the blocked high-pressure chamber so that the pressure of the hydraulic oil in the chamber will drop to achieve unloading, and then the stop valve piston will Move to the right to open the main oil circuit. At this time, the globe valve can remove the sliding sleeve, and only the ...

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Abstract

The invention concretely relates to an unloading type hydraulic control stop valve and the opening method thereof. The opening method of the hydraulic stop valve includes the following steps: an unloading cavity with variable volume is connected on one side of the high pressure cavity; the unloading cavity is firstly opened before the main valve is opened to enlarge the volume of the unloading cavity, so as to reduce the oil pressure in the unloading cavity; then the high pressure cavity communicated with the unloading cavity is correspondingly reduced; when the pressure is reduced to a certain degree, the main valve port is opened. The unloading type hydraulic control stop valve which can realize the opening method comprises a left end cover, a first end surface seal ring, a static seal ring, a pressing ring, a piston and a valve body; the piston is a combined piston in which a hollow cavity with variable volume is arranged; the hollow cavity is communicated with the high pressure cavity connecting port inside the left end cover. The valve port adopts the high elasticity material to realize the end surface seal so that the seal reliability and the service life are improved effectively; the automatic control can be realized conveniently; the service life of the end surface seal ring and the reliability of the stop valve can be improved.

Description

【Technical field】 [0001] The invention belongs to the field of fluid mechanical engineering, and in particular relates to an unloading type hydraulic control hydraulic cut-off valve and an opening method thereof. 【Background technique】 [0002] Hydraulic shut-off valves are mainly used to control the circulation and cut-off of oil in hydraulic pipelines, and are basic hydraulic components. At present, there are many manufacturers in our country producing hydraulic globe valves. The valve core structures are spherical, conical, cylindrical, etc., but they are basically manually driven. [0003] In engineering practice, there are many occasions that require the hydraulic passage to be both conductive and reliable, and the two states are frequently switched, but the use of manual hydraulic shut-off valves often seriously affects the frequency and reliability of this conversion, hindering equipment The level of automation is high, and the performance of cutting off the oil circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/12F16K1/36F16K1/42F16K39/00F16K25/00F15B13/02
Inventor 沈兆奎解宁刘艳玲陈广来
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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