CN217582196U - Column nitrogen safety valve - Google Patents

Abstract

The utility model discloses a stand nitrogen gas relief valve, including valve body, dirt proof boot, case, valve gap, ejector pin, circlip, spring holder, spring, sealing ring, shield etc. The valve body right-hand member is feed liquor quick-connect plug, and the valve body left end adopts threaded connection with the valve gap, and the valve gap inner chamber sets up the annular groove, installation circlip, and the circlip left end sets gradually spring holder and reset spring, and the other end of spring supports on the ejector pin boss, and the opposite side of ejector pin boss sets up the sealing ring. The valve body inner chamber sets up the case, and case right-hand member face and valve body inner chamber boss are laminated mutually. The valve body is provided with a pressure relief hole which is communicated with the inner cavity. The air inlet end of the valve cover is provided with a dust cover, and a dust cover is arranged at a pressure relief hole on the outer side of the valve body. The utility model has the advantages of reasonable structure, reliable performance, long service life and the like.

Description

Column nitrogen safety valve

Technical Field

The utility model belongs to the hydraulic pressure field, concretely relates to stand nitrogen gas relief valve.

Background

Along with the large-scale implementation and development of the hydraulic support in coal mine excavation, the relevant standards of hydraulic equipment are stricter, the safety valve for protecting the hydraulic support and the relevant equipment has stricter requirements, and the safety valve has longer service life and higher reliability. The existing stand column nitrogen safety valve for the coal mine hydraulic support has the problems of poor buffering effect, inconvenience in adjustment of nitrogen pressure and sealing effect.

Disclosure of Invention

An object of the utility model is to provide a stand nitrogen gas relief valve rational in infrastructure, stable performance is reliable, long service life.

In order to achieve the purpose, the utility model discloses a stand nitrogen gas relief valve, including valve body, dirt proof boot, case, valve gap, ejector pin, circlip, spring holder, spring, sealing ring, shield etc. The valve body right-hand member is the fast bayonet joint of feed liquor, and the valve body left end adopts threaded connection with the valve gap, and the valve gap inner chamber sets up the annular groove, installation circlip, and the circlip left end sets gradually spring holder and reset spring, and the other end of spring supports on the ejector pin boss, and the opposite side of ejector pin boss sets up the sealing ring, and the elasticity of spring makes ejector pin boss and sealing ring sticiss on the inner wall of valve gap inner chamber, keeps encapsulated situation. The left short rod part of the ejector rod extends out of the air inlet of the valve cover with an air inlet gap, and the right long rod part of the ejector rod extends into the middle hole of the spring seat to play a role in guiding. The shaft shoulder is arranged in the middle of the long rod, and when the ejector rod is pushed by filling nitrogen, the ejector rod moves rightwards until the shaft shoulder abuts against the end face of the groove of the spring seat, so that smooth inflation can be realized. The valve body inner chamber sets up the case, and the case left end sets up to hollow structure, can increase the reserves of nitrogen gas, and the case right-hand member face laminates with valve body inner chamber boss mutually, and valve body inner chamber and case complex inner wall department set up O type circle, and the valve body sets up the pressure release hole, communicates with each other with the inner chamber. The right end face of the valve core is provided with a liquid inlet hole which is communicated with the groove of the valve core. When the valve core moves leftwards, the liquid inlet hole of the valve core is communicated with the pressure relief hole in the inner cavity of the valve sleeve through the groove, so that pressure relief is realized. The air inlet end of the valve cover is provided with a dust cover, and the pressure relief hole on the outer side of the valve body is provided with a dust cover.

The two sides of the pressure relief hole of the inner cavity of the valve body of the stand column nitrogen safety valve are provided with the O-shaped sealing rings, so that the sealing performance of the safety valve can be ensured, direct contact abrasion with the inner wall of the valve body can be avoided when the valve core slides left and right, and the service life is prolonged.

According to the stand column nitrogen safety valve, the groove is formed in the middle hole of the spring seat arranged in the inner cavity of the valve cover, after the spring is sleeved into the ejector rod, one end of the spring is supported on the boss of the ejector rod, the other end of the spring is supported on the groove of the spring seat, and therefore the safety valve can be prevented from being out of work due to deviation of the spring.

This stand nitrogen gas relief valve, the stock part of ejector pin boss right-hand member stretches into the spring holder mesopore, plays the guide effect, and the intermediate position of stock sets up the shaft shoulder, and when filling nitrogen gas promotion ejector pin, the ejector pin moves right to the shaft shoulder supports and to aerifing smoothly in spring holder groove end face department, and the shaft shoulder plays limiting displacement, when preventing to promote the ejector pin, and ejector pin boss left end quarter butt part slides into the valve gap inner chamber from the inlet port.

The column nitrogen safety valve has the advantages that the materials of the spring seat, the piston and the valve core are properly selected and reasonably matched in a clearance manner, and the safety valve is guaranteed to move flexibly and reliably.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

labeled in the figure as: 1. a valve body; 2. a valve core; 3. an O-shaped sealing ring; 4. a valve cover; 5. a top rod; 6. a dust cover; 7. a seal ring; 8. a spring; 9. a spring seat; 10. a circlip; 11. a dust-proof cover.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The embodiment of the utility model provides a stand nitrogen gas relief valve, including valve body 1, dirt proof boot 11, case 2, valve gap 4, ejector pin 5, circlip 10, spring holder 9, spring 8, sealing ring 7, shield 6 etc.. The right-hand member of valve body 1 is the feed liquor quick connector, and 1 left end of valve body adopts threaded connection with valve gap 4, and 4 inner chambers of valve gap set up the annular groove, and installation circlip 10, circlip 10 left end set gradually spring holder 9 and reset spring 8, and the hole department is fluted in spring holder 9, and after spring 8 emboliaed ejector pin 5, one end was supported on 5 bosss of ejector pin, and the other end supported the groove department at spring holder 9, can prevent that 8 off tracking of spring from leading to the relief valve inefficacy. The other side of the ejector rod 5 boss is provided with a sealing ring 7, and the elastic force of a spring 8 enables the ejector rod 5 boss and the sealing ring 7 to be tightly pressed on the inner wall of the inner cavity of the valve cover 4 to keep a sealing state. The short rod part at the left end of the ejector rod 5 extends out of the air inlet of the valve cover 4 with an air inlet gap, and the long rod part at the right end of the ejector rod 5 extends into the hole of the spring seat 9 to play a role in guiding. The shaft shoulder is arranged in the middle of the long rod, when the ejector rod 5 is pushed by filling nitrogen, the ejector rod 5 moves rightwards until the shaft shoulder abuts against the end face of the groove of the spring seat 9, and then smooth inflation can be achieved, the shaft shoulder plays a limiting role, and when the ejector rod 5 is pushed, the short rod part at the left end of the boss of the ejector rod 5 slides into the inner cavity of the valve cover 4 from the air inlet hole. 1 inner chamber of valve body sets up case 2, and 2 left ends of case set up to hollow structure, can increase the reserves of nitrogen gas, and 2 right-hand member faces of case and 1 inner chamber bosss of valve body laminate mutually, and the pressure release hole both sides of 1 inner chamber of valve body all set up O type sealing washer 3 with 2 complex inner walls of case, both can guarantee the sealing performance of relief valve, can avoid direct and 1 inner wall contact wear of valve body when case 2 horizontal slip again, improve life. The valve body 1 is provided with a pressure relief hole which is communicated with the inner cavity. The right end face of the valve core 2 is provided with a liquid inlet hole which is communicated with the groove of the valve core 2. When the valve core 2 moves leftwards, the liquid inlet hole of the valve core 2 is communicated with the pressure relief hole of the inner cavity of the valve body 1 through the groove, so that pressure relief is realized. The air inlet end of the valve cover 4 is provided with a dustproof cover 6, and a dustproof sleeve 11 is arranged at a pressure relief hole on the outer side of the valve body 1.

The working principle of the column nitrogen safety valve is as follows: the embodiment is used for controlling a coal mine hydraulic support system, when nitrogen is filled, the dust cover needs to be opened, the nitrogen filling device overcomes the spring force to push the ejector rod, the sealing ring is enabled to leave the end face of the inner cavity of the valve cover, the nitrogen can enter the inner cavity of the valve body through the gap between the air inlet hole and the ejector rod, and the air filling pressure value can be set according to the system requirement. When the protected hydraulic device is in a normal working state, the hydraulic pressure of the liquid acting on the valve core of the vertical column nitrogen safety valve through the joint is smaller than or equal to a set nitrogen pressure value, and the vertical column nitrogen safety valve is in a closed state at the moment. Along with the pressure in the hydraulic system rises gradually, when the system pressure rises to the set value, surpass the nitrogen pressure value, liquid overcomes nitrogen pressure and pushes away the case, leaves the O type sealing washer when the recess of case, moves to and communicates with each other with the valve body inner chamber, and stand nitrogen safety valve is opened completely, and liquid gets into the case recess through the feed liquor hole of case, then discharges through the pressure release hole of valve body. Along with the continuous discharge of liquid, system pressure reduces gradually, and when pressure reduced the setting value, nitrogen pressure was greater than system pressure, and at this moment, under the effect of nitrogen pressure, the promotion valve core moved to the right. When the right end face of the valve core moves to be closely attached to the end face of the boss of the inner cavity of the valve body, the groove of the valve core moves to the right side of the O-shaped sealing ring, and the vertical column nitrogen safety valve is completely closed at the moment.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.

Claims (3)

1. A column nitrogen safety valve comprises a valve body, a dustproof sleeve, a valve core, a valve cover, an ejector rod, an elastic retainer ring, a spring seat, a spring, a sealing ring and a dustproof cover, and is characterized in that a liquid inlet quick connector is arranged at the right end of the valve body, the left end of the valve body is in threaded connection with the valve cover, an annular groove is formed in an inner cavity of the valve cover, the elastic retainer ring is installed, the spring seat and a reset spring are sequentially arranged at the left end of the elastic retainer ring, the other end of the spring abuts against a boss of the ejector rod, the sealing ring is arranged on the other side of the boss of the ejector rod, the ejector rod boss and the sealing ring are tightly pressed on the inner wall of the inner cavity of the valve cover through the elastic force of the spring to keep a sealing state, a short rod part at the left end of the ejector rod extends out of an air inlet of the valve cover and is provided with an air inlet gap, the long rod part at the right end of the ejector rod extends into the middle hole of the spring seat, the guiding effect is achieved, a shaft shoulder is arranged at the middle position of the long rod, when the ejector rod is pushed by nitrogen, the ejector rod moves rightwards to abut against the shaft shoulder at the end face of the groove of the spring seat, a valve body inner cavity is provided with a valve core, the left end of the valve core is arranged into a hollow structure, the right end face of the valve core is attached to a boss of the inner cavity of the valve body, an O-shaped ring is arranged at the inner wall of the inner cavity of the valve body and matched with the valve core, the valve body is provided with a pressure relief hole which is communicated with an inner cavity, the right end face of the valve core is provided with a liquid inlet hole, the liquid inlet hole is communicated with the groove of the valve core, when the valve core moves leftwards, the liquid inlet hole of the valve core is communicated with the pressure relief hole of the inner cavity of the valve body through the groove, the pressure relief hole in the outer side of the valve body is provided with a dust cover.

2. The nitrogen column safety valve of claim 1, wherein O-rings are disposed on both sides of the pressure relief hole in the inner cavity of the valve body.

3. The nitrogen safety valve of claim 1, wherein the spring seat is provided with a groove at the center hole of the spring seat, and the spring is sleeved in the ejector rod, and one end of the spring abuts against the boss of the ejector rod, and the other end of the spring abuts against the groove of the spring seat.

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