CN112983799A

CN112983799A - Pressure relief device and pressure relief system for emulsion pump station

Info

Publication number: CN112983799A
Application number: CN202110205719.9A
Authority: CN
Inventors: 杜建华; 何珊; 杨淑芳; 褚峰伟
Original assignee: Beijing Huahai Machinery Co ltd
Current assignee: Beijing Huahai Machinery Co ltd
Priority date: 2021-02-24
Filing date: 2021-02-24
Publication date: 2021-06-18

Abstract

The application relates to a pressure relief device and a pressure relief system for an emulsion pump station, and relates to the field of hydraulic pipeline pressure relief. The pressure relief rod in the mounting seat, one end of the pressure relief rod protrudes from the mounting seat, and when the pressure relief rod slides inside the mounting seat, the valve core of the suction valve on the plunger pump can be opened to realize the discharge pressure. The present application has the effect of enabling the emulsion pump to run at zero load in a pressure relief state and reducing hydraulic power consumption.

Description

Pressure relief device and pressure relief system for emulsion pump station

Technical Field

The application relates to the field of hydraulic pipeline pressure release, especially relates to a pressure relief device and pressure relief system for emulsion pump station.

Background

The emulsion pump station is a device which is arranged under a coal mine and provides a hydraulic power source for hydraulic equipment and the like, and comprises an emulsion pump and a liquid tank, wherein the emulsion pump is a plunger pump. When the hydraulic equipment is stopped or the liquid consumption is reduced, the hydraulic pressure in the liquid supply system is increased, and when the hydraulic pressure is increased to be higher than a set value, the normal work of the hydraulic equipment is influenced, so that the pressure of the hydraulic system needs to be relieved in time.

The plunger pump drives the slide block to do reciprocating linear motion through the crank connecting rod, and the liquid suction valve and the liquid discharge valve are opened and closed alternately by utilizing the pressure change in the cylinder, so that the processes of liquid suction and liquid supply are completed. The pressure relief device is a control valve which ensures the normal liquid supply of the emulsion pump and adapts to the intermittent liquid supply of hydraulic equipment. The pressure relief device is connected in series on a liquid conveying pipeline between the emulsion pump and the hydraulic equipment, and ensures that high-pressure emulsion is conveyed to the hydraulic equipment under a normal state, so that high-pressure emulsion power is provided for the corresponding hydraulic equipment; when the hydraulic equipment is stopped or the liquid consumption is reduced, so that the hydraulic pressure in the liquid supply system is increased to be higher than a set value, the pressure relief device is started to relieve the pressure, the hydraulic pressure in the liquid supply system is reduced to be the set value, and the normal operation of the equipment is ensured.

With respect to the related art in the above, the inventors consider that: in the unloading state, the emulsion pump still operates to continuously supply liquid outwards, when the liquid discharge amount of the pressure relief device is smaller than the liquid supply amount of the pump, a hydraulic value is still maintained in the pump and the liquid supply system, and the pump is not in a zero-load operation state and still has certain hydraulic power consumption.

Disclosure of Invention

In order to enable the emulsion pump to run under a zero load in a pressure relief state, the hydraulic power consumption is reduced.

First aspect, the application provides a pressure relief device for emulsion pump station adopts following technical scheme:

the utility model provides a pressure relief device for emulsion pump station, pressure relief device is including installing mount pad and the sliding connection that is close to imbibition valve one end at the plunger pump pressure release pole in the mount pad, pressure release pole one end is stretched out the mount pad is worked as the pressure release pole is in can back down the case realization pressure release of imbibition valve on the plunger pump when the mount pad is inside to slide.

Through adopting above-mentioned technical scheme, when needs pressure release, the direct operation pressure release pole slides in the mount pad, and the pressure release pole is located the outside one end of mount pad and will backs down the case of imbibition valve on the plunger pump for when the slider in the plunger pump slides in the plunger pump, also can't realize supplying liquid in the inside case that forms high pressure and backs down the flowing back valve of plunger pump, realized plunger pump zero load operation, greatly reduced hydraulic power consumption.

Optionally, the pressure release rod is wholly T-shaped, and is in including sliding inside slider and the rigid coupling of mount pad are in ejector pin on the slide, the supply has been seted up to the mount pad inside the gliding spout of slider and set up the mount pad towards plunger pump one end with place the hole between the spout, the ejector pin is located place downthehole.

Through adopting above-mentioned technical scheme, can make the ejector pin jack-up plunger pump go up the case of imbibition valve and realize the pressure release through the position of sliding part in the spout, perhaps lie in the imbibition valve outside of plunger pump and do not influence normal work, it is more convenient to operate.

Optionally, the sliding part includes a sliding plate slidably connected in the sliding groove and a limit ring fixedly connected to the sliding plate, and the limit ring is located on one side of the sliding plate facing the top rod.

Through adopting above-mentioned technical scheme, when needs pressure release, the operation slider slides in the spout, on the lateral wall that is close to place hole one end at the spout until the spacing ring butt to restrain the position of slider in the spout.

Optionally, the top rod comprises a first rod fixedly connected to the sliding plate and a second rod in threaded connection with one end, far away from the sliding plate, of the first rod.

Through adopting above-mentioned technical scheme, when the second pole damaged, can directly pull down the second pole from first pole and change, it is more convenient to change.

Optionally, a control groove communicated with the sliding groove is formed in the mounting seat, the control groove is located on one side, away from the placing hole, of the sliding groove, an abutting spring is installed in the control groove, and the abutting spring is located between the bottom of the control groove and the sliding piece to push the sliding piece to move in the sliding groove in the direction away from the abutting spring.

Through adopting above-mentioned technical scheme, slide the butt slider in the spout under butt spring elastic force to the one end that drives the slider and is located the mount pad outside slides to the direction of keeping away from the mount pad, thereby backs up the case of imbibition valve on the plunger pump, realizes the pressure release.

Optionally, a gas injection hole communicated to the chute is formed in one side of the mounting seat, and the gas injection hole is communicated to one side of the sliding plate, which is far away from the abutting spring.

Through adopting above-mentioned technical scheme, after the pressure release finishes, directly with high-pressure gas from the gas injection hole injection spout in, high-pressure gas will reach the slide and keep away from one side of butt spring to promote the slide and extrude the butt spring to drive the ejector pin and extract from the imbibition valve of plunger pump, make the plunger pump resume normal confession liquid work.

Optionally, a mounting ring is fixedly connected to the outer wall of the mounting seat, and a fixing bolt is connected to the mounting ring through a thread.

Through adopting above-mentioned technical scheme, can install the mount pad on the plunger pump through fixing bolt, it is more convenient to install.

The second aspect, this application provides a pressure release system for emulsion pump station, adopts following technical scheme:

the utility model provides a pressure release system for emulsion pump station, including pressure relief device and with the gas-supply pipe of the last spout intercommunication of pressure relief device, install the installation pipe on the gas-supply pipe, installation pipe one end intercommunication extremely in pressure relief device's the spout, the gas-supply pipe is kept away from the intercommunication has the gas holder on the gas-supply pipe, install discharge valve on the gas-supply pipe.

Through adopting above-mentioned technical scheme, under the normality, high-pressure gas in the gas holder will reach the installation pipe through the gas-supply pipe in, then reach the spout along the installation pipe and lie in the slide and keep away from one side of butt spring to drive slide extrusion butt spring and slide to butt spring place direction. And finally, the sliding plate is abutted against one end side wall of the sliding groove close to the control groove, so that the position of the sliding plate in the sliding groove is fixed, and at the moment, the plunger pump normally works to supply liquid for the hydraulic equipment. When hydraulic equipment is stopped or liquid consumption is reduced, so that hydraulic pressure in the liquid supply system rises to a set value or above, the exhaust valve is opened, high-pressure gas in the sliding groove reaches the gas conveying pipe along the installation pipe from the exhaust hole and is discharged from the exhaust valve, and the sliding plate also moves towards the direction far away from the butt spring under the action of the butt spring, so that the ejector rod jacks the valve core of the liquid suction valve on the plunger pump, the valve core of the liquid discharge valve is jacked by the high-pressure cavity which cannot be formed in the plunger pump, and pressure relief is realized.

Optionally, an electromagnetic valve is installed on the gas pipe, and the electromagnetic valve is located between the exhaust valve and the gas storage tank.

Through adopting above-mentioned technical scheme, when discharge valve opened the high-pressure gas discharge in the spout, the solenoid valve also closed to cut off being connected between gas holder and the discharge valve, avoid the gas in the gas holder to discharge from discharge valve.

Optionally, an air compressor for providing high-pressure air to the air storage tank is mounted on the air storage tank.

Through adopting above-mentioned technical scheme, the air compressor machine provides high-pressure gas for the gas holder, guarantees pressure relief device's normal work.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the pressure relief rod is arranged at a liquid suction valve of the plunger pump and can jack up a valve core of the liquid suction valve on the plunger pump to realize pressure relief, so that when a slide block in the plunger pump slides, a high-pressure cavity formed in the plunger pump can not jack up the liquid discharge valve to supply liquid, the plunger pump can run at zero load, and the hydraulic power consumption is greatly reduced;

2. the limiting ring is arranged so that when the limiting ring is abutted against one end of the sliding chute, which is far away from the abutting spring, under the action of the abutting spring, a certain gap is reserved between one end of the sliding chute, which is far away from the abutting spring, and the sliding plate, so that a gas injection hole can conveniently inject high-pressure gas between one end of the sliding chute, which is far away from the abutting spring, and the sliding plate;

3. due to the arrangement of the mounting ring and the fixing bolt, when the pressure relief device is mounted, the mounting ring is directly fixed on the plunger pump through the fixing bolt, and the mounting and the dismounting are very convenient.

Drawings

Fig. 1 is a schematic diagram of a main structure of a plunger pump.

Fig. 2 is a schematic view of the overall structure of the pressure relief device in the present application.

Fig. 3 is a schematic cross-sectional view of an internal structure of a pressure relief device.

Fig. 4 is a schematic diagram of the overall structure of the pressure relief system in the present application.

Description of reference numerals: 01. a plunger pump body; 011. a liquid suction port; 012. a liquid discharge port; 1. a mounting seat; 11. a first mounting post; 111. a chute; 112. placing holes; 113. a gas injection hole; 12. a second mounting post; 121. a control slot; 13. a mounting ring; 14. fixing the bolt; 2. a pressure relief lever; 21. a slider; 211. a slide plate; 212. a limiting ring; 22. a top rod; 221. a first lever; 222. a second lever; 23. a first placing groove; 24. a first seal ring; 25. a second placing groove; 26. a second seal ring; 3. an abutment spring; 4. a gas delivery pipe; 41. installing a pipe; 42. an exhaust valve; 43. an electromagnetic valve; 5. a gas storage tank; 6. an air compressor.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

Referring to fig. 1, the plunger pump includes a plunger pump body 0, a liquid suction port 011 is provided at one side of the plunger pump body 0, a liquid discharge port 012 is provided at the other side of the plunger pump, a liquid suction valve (not shown) is provided at the liquid suction port 011 inside the plunger pump body 0, and a liquid discharge valve (not shown) is provided at the liquid discharge port 012 inside the plunger pump body 0.

The embodiment of the application discloses pressure relief device for emulsion pump station. Referring to fig. 2 and 3, the pressure relief device includes a mounting base 1 installed at one end of a liquid suction valve of the plunger pump and a pressure relief rod 2 slidably connected inside the mounting base 1, wherein one end of the pressure relief rod 2 extends out of the mounting base 1, when the pressure relief rod 2 slides inside the mounting base 1, a valve core of the liquid suction valve on the plunger pump can be jacked open, so that a sliding block of the plunger pump cannot form a high-pressure jacked open valve core of the liquid discharge valve inside the plunger pump to supply liquid, and pressure relief of the liquid supply system is realized.

When the pressure relief rod 2 jacks up the valve core of the liquid suction valve, the interior of the plunger pump and the liquid suction port 011 of the plunger pump are kept in a communicated state, so that the plunger pump is in a no-load running state, and the energy conservation and consumption reduction are facilitated. At this time, the drain valve of the plunger pump has actually become a check valve (one-way valve) of the liquid supply system, so that the original hydraulic pressure in the high-pressure liquid supply system pipeline is stable and unchanged, once the hydraulic equipment reuses liquid, the hydraulic pressure in the liquid supply system is reduced, the pressure relief rod 2 rapidly retracts into the mounting seat 1, the liquid suction valve core is closed, and the plunger pump recovers the pumping pressure. Compare current with the pressure relief device setting between emulsion pump and hydraulic equipment, during the pressure release, original hydraulic pressure in the hydraulic system is also unloaded, when waiting for hydraulic equipment to use liquid again, need establish hydraulic pressure in the hydraulic pressure pipeline again for supply liquid speed delays greatly. The pressure relief device has the characteristics of timely restoration of loading operation pressure and high liquid supply speed.

Referring to fig. 3, the mounting seat 1 includes a first mounting column 11 and a second mounting column 12 fixedly connected to one end of the first mounting column 11 by a bolt, a sliding groove 111 is formed at one end of the first mounting column 11 facing the second mounting column 12, and a placing hole 112 communicated to the sliding groove 111 is formed at one end of the first mounting column 11 away from the second mounting column 12, wherein a diameter of the sliding groove 111 is larger than a diameter of the placing hole 112, so that a step surface is formed between the sliding groove 111 and the placing hole 112. The pressure relief rod 2 is T-shaped as a whole, and includes a sliding member 21 slidably connected in the sliding groove 111 and a top rod 22 vertically fixed to one end of the sliding member 21. The ejector rod 22 can be driven to slide by sliding the position of the sliding piece 21 in the sliding groove 111, so that the ejector rod 22 is positioned outside the liquid suction valve on the plunger pump and does not influence the normal liquid supply work of the plunger pump or the ejector rod 22 jacks a valve core of the liquid suction valve on the plunger pump to release pressure.

Referring to fig. 3, a control groove 121 is formed in one end of the second mounting post 12 facing the first mounting post 11, when the second mounting post 12 is mounted on the first mounting post 11, the control groove 121 is located on one side of the sliding groove 111 away from the placing hole 112, the abutting spring 3 is mounted in the control groove 121, one end of the abutting spring 3 abuts against the bottom of the control groove 121, and the other end of the abutting spring 3 abuts against the sliding member 21, so that the sliding member 21 is pushed to move towards one end away from the abutting spring 3, and the ejector rod 22 is driven to jack the valve core of the liquid suction valve on the plunger pump to realize pressure relief.

The sliding member 21 includes a sliding plate 211 slidably connected to the sliding groove 111 and a limit ring 212 fixedly connected to an end of the sliding plate 211 facing the plunger 22, and when the plunger 22 pushes open the valve element of the liquid suction valve under the action of the abutting spring 3, the limit ring 212 abuts on a step surface between the sliding groove 111 and the placing hole 112, thereby fixing the position of the pressure relief rod 2. When the stop collar 212 abuts against the step surface, a certain gap is left between the step surface and the sliding plate 211, a gas injection hole 113 communicated with the sliding chute 111 is formed in the side wall of the first mounting column 11, and the gas injection hole 113 is communicated with the gap between the step surface and the sliding plate 211. When the hydraulic equipment is restarted and the plunger pump is required to recover the liquid supply operation, external high-pressure gas can be injected into the chute 111 from the gas injection hole 113, the high-pressure gas can push the sliding plate 211 to move in the direction away from the placing hole 112 and press the spring until one end of the sliding plate 211 facing the spring abuts against the second mounting column 12, and therefore the position of the sliding plate 211 in the chute 111 is fixed. At this time, the ejector rod 22 is also pulled out from the liquid suction valve of the plunger pump, the valve core of the liquid suction valve is closed, and the plunger pump recovers the pump pressure to perform normal liquid supply operation.

In order to avoid that high-pressure gas in the sliding groove 111 flows to one side of the sliding plate 211 facing the abutting spring 3 from the sliding plate 211 when the plunger pump normally supplies liquid, the sliding plate 211 slides in the sliding groove 111 under the elastic force action of the abutting spring 3, so that the ejector rod 22 is driven to jack the valve core of the liquid suction valve on the plunger pump, and the normal liquid supply operation of the plunger pump is influenced. An annular first placing groove 23 is formed in the outer wall of the sliding plate 211, a first sealing ring 24 is placed in the first placing groove 23, the first sealing ring 24 is located between the sliding plate 211 and the inner wall of the sliding groove 111, the sliding plate 211 and the inner wall of the sliding groove 111 can be sealed, and high-pressure gas in the sliding groove 111 is prevented from leaking between the sliding plate 211 and the inner wall of the sliding groove 111. Meanwhile, in order to avoid leakage of high-pressure gas in the sliding groove 111 from the placing hole 112, the outer wall of the ejector 22 is provided with two annular second placing grooves 25, the two second placing grooves 25 are spaced along the length direction of the ejector 22, a second sealing ring 26 is placed in each second placing groove 25, the second sealing ring 26 is located between the ejector 22 and the inner wall of the placing hole 112, the inner walls of the ejector 22 and the placing hole 112 can be sealed, and leakage of high-pressure gas in the sliding groove 111 from the inner walls of the ejector 22 and the placing hole 112 is avoided.

Referring to fig. 3, the top rod 22 includes a first rod 221 fixedly connected to the sliding plate 211 and a second rod 222 detachably connected to an end of the first rod 221 far from the sliding plate 211, wherein the first rod 221 is located in the placing hole 112, an end of the first rod 221 far from the sliding plate 211 extends out of the placing hole 112 and is exposed to the outside, an end of the first rod 221 located outside the placing hole 112 is in threaded connection with the second rod 222, specifically, an external thread is processed at an end of the second rod 222, a threaded hole matched with the second rod 222 is formed at an end of the first rod 221 far from the sliding plate 211, and the first rod 221 and the second rod 222 can be detachably connected by screwing the second rod 222 into the threaded hole of the first rod 221.

Meanwhile, in order to facilitate the installation of the installation seat 1, an installation ring 13 is fixedly connected to the outer wall of the first installation column 11, the installation ring 13 is located at one end, far away from the second installation column 12, of the first installation column 11, a fixing bolt 14 is connected to the installation ring 13 in a threaded manner, and the fixing bolt 14 is arranged in a plurality of positions at intervals along the circumferential direction of the installation ring 13. During installation, the installation ring 13 is directly and fixedly installed at one end, close to the liquid suction valve, of the plunger pump main body 0 through the fixing bolt 14, and installation and disassembly are very convenient.

The implementation principle of the pressure relief device for the emulsion pump station in the embodiment of the application is as follows: under normal state, high-pressure gas is injected into the chute 111, the push sliding plate 211 abuts against the second mounting column 12 and presses the abutting spring 3, and the plunger pump is in a normal liquid supply state. When the hydraulic equipment is stopped or the liquid consumption is reduced, so that the hydraulic pressure in the liquid supply system is increased to be above a set value, the high-pressure gas in the sliding groove 111 is discharged from the gas injection hole 113, the sliding plate 211 slides in the sliding groove 111 under the action of the elastic force of the abutting spring 3, and the ejector rod 22 is driven to jack the valve core of the liquid suction valve on the plunger pump, so that the pressure relief is realized.

The embodiment of the application also discloses a pressure relief system for the emulsion pump station. Referring to fig. 3 and 4, the pressure relief system includes a pressure relief device and a gas pipe 4 communicating with a chute 111 on the pressure relief device. Air supply pipe 4 one end is sealed, and gas holder 5 is installed to the other end, and the intercommunication has installation pipe 41 on the air supply pipe 4 outer wall, and on the one end that the air supply pipe 4 was kept away from to installation pipe 41 was connected to pressure relief device's gas injection hole 113, can carry high-pressure gas to pressure relief device's spout 111 in through gas holder 5.

And an exhaust valve 42 is also arranged on the air delivery pipe 4. Under normal state, the exhaust valve 42 is in a closed state, and high-pressure gas in the gas storage tank 5 reaches the mounting pipe 41 through the gas conveying pipe 4 and reaches the sliding chute 111 from the mounting pipe 41 through the gas injection hole 113, so that the sliding plate 211 is pressed against the spring 3 through the sliding plate 211, and the position of the sliding plate 211 in the sliding chute 111 is fixed. When the hydraulic equipment is stopped or the liquid consumption is reduced, so that the hydraulic pressure in the liquid supply system is increased to be above a set value, the exhaust valve 42 is opened, high-pressure gas in the sliding groove 111 is discharged from the exhaust valve 42, the sliding plate 211 slides in the sliding groove 111 under the action of the elastic force of the spring, and the ejector rod 22 is driven to jack open a valve core of a liquid suction valve on the plunger pump, so that pressure relief is realized. When the hydraulic equipment normally works, the hydraulic pressure in the liquid supply system is reduced, the exhaust valve 42 is closed, the high-pressure gas in the gas storage tank 5 is injected into the chute 111 again, the ejector rod 22 is driven by the sliding plate 211 to be pulled out of the liquid suction valve on the plunger pump, and the plunger pump returns to the normal liquid supply work.

In order to prevent the high-pressure gas in the gas storage tank 5 from being discharged from the exhaust valve 42 when the exhaust valve 42 is opened, an electromagnetic valve 43 is installed on the gas transmission pipe 4, and the electromagnetic valve 43 is located between the gas storage tank 5 and the exhaust valve 42. The electromagnetic valve 43 is in a normally open state, and when the exhaust valve 42 is opened to discharge the high-pressure gas in the sliding groove 111, the electromagnetic valve 43 is closed, so that the communication state between the gas storage tank 5 and the exhaust valve 42 is closed, and the high-pressure gas in the gas storage tank 5 is prevented from being discharged from the exhaust valve 42.

Wherein, installation pipe 41 is provided with a plurality ofly, when needing a plurality of plunger pumps to provide the emulsion work for hydraulic equipment simultaneously, can realize the pressure release work to a plurality of plunger pumps through a pressure release system.

Referring to fig. 4, an air compressor 6 connected with the air storage tank 5 is further arranged on one side of the air storage tank 5, the air compressor 6 can provide high-pressure air for the air storage tank 5, and normal operation of a pressure relief system is guaranteed

The implementation principle of the pressure relief system for the emulsion pump station in the embodiment of the application is as follows: under the normal state, the exhaust valve 42 is in the closed state, the electromagnetic valve 43 is in the open state, the high-pressure gas in the gas storage tank 5 reaches the sliding groove 111 through the gas pipe 4 and the mounting pipe 41, and pushes the sliding plate 211 to abut against the second mounting column 12, so that the position of the sliding plate 211 in the sliding groove 111 is fixed. When the hydraulic equipment is stopped or the liquid consumption is reduced, so that the hydraulic pressure in the liquid supply system is increased to be above a set value, the exhaust valve 42 is opened, high-pressure gas in the sliding groove 111 is discharged from the exhaust valve 42, the sliding plate 211 slides in the sliding groove 111 under the action of the elastic force of the spring, and the ejector rod 22 is driven to jack open a valve core of a liquid suction valve on the plunger pump, so that pressure relief is realized. At the moment, the plunger pump is in zero-load operation, and the hydraulic power consumption is greatly reduced. At the same time, the solenoid valve 43 is closed to prevent the high-pressure gas in the gas container 5 from being discharged from the gas discharge valve 42. When the hydraulic equipment normally works, the hydraulic pressure in the liquid supply system is reduced, the exhaust valve 42 is closed, the electromagnetic valve 43 is opened at the same time, the high-pressure gas in the gas storage tank 5 is injected into the chute 111 again, the push rod 22 is driven to be pulled out of the liquid suction valve on the plunger pump through the sliding plate 211, and the plunger pump returns to the normal liquid supply work.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a pressure relief device for emulsion pump station which characterized in that: including installing mount pad (1) and the sliding connection that is close to imbibition valve one end at the plunger pump pressure release pole (2) in mount pad (1), pressure release pole (2) one end stretches out mount pad (1), works as pressure release pole (2) are in but the case of the apical open plunger pump last imbibition valve realizes the pressure release when mount pad (1) is inside to slide.

2. The pressure relief device for the emulsion pump station according to claim 1, characterized in that: pressure relief pole (2) wholly is T shape, including slide mount pad (1) inside slider (21) and rigid coupling are in ejector pin (22) on slide (211), mount pad (1) is inside to be seted up and to be supplied slider (21) gliding spout (111) and set up mount pad (1) towards plunger pump one end with place hole (112) between spout (111), ejector pin (22) are located place in hole (112).

3. The pressure relief device for the emulsion pump station according to claim 2, characterized in that: the sliding part (21) comprises a sliding plate (211) which is connected in the sliding groove (111) in a sliding mode and a limiting ring (212) which is fixedly connected to the sliding plate (211), and the limiting ring (212) is located on one side, facing the ejector rod (22), of the sliding plate (211).

4. The pressure relief device for the emulsion pump station according to claim 3, characterized in that: the top rod (22) comprises a first rod (221) fixedly connected to the sliding plate (211) and a second rod (222) in threaded connection with one end, far away from the sliding plate (211), of the first rod (221).

5. The pressure relief device for the emulsion pump station according to claim 2, characterized in that: a control groove (121) communicated with the sliding groove (111) is formed in the mounting seat (1), the control groove (121) is located on one side, away from the placing hole (112), of the sliding groove (111), an abutting spring (3) is installed in the control groove (121), the abutting spring (3) is located between the bottom of the control groove (121) and the sliding piece (21), and therefore the sliding piece (21) is pushed to move in the sliding groove (111) in the direction away from the abutting spring (3).

6. The pressure relief device for the emulsion pump station according to claim 5, characterized in that: one side of the mounting seat (1) is provided with a gas injection hole (113) communicated to the sliding chute (111), and the gas injection hole (113) is communicated to one side of the sliding plate (211) far away from the abutting spring (3).

7. The pressure relief device for the emulsion pump station according to claim 1, characterized in that: the mounting base is characterized in that a mounting ring (13) is fixedly connected to the outer wall of the mounting base (1), and a fixing bolt (14) is connected to the mounting ring (13) in a threaded mode.

8. The utility model provides a pressure release system for emulsion pump station which characterized in that: including pressure relief device and with gas-supply pipe (4) of spout (111) intercommunication on the pressure relief device, install installation pipe (41) on gas-supply pipe (4), installation pipe (41) one end intercommunication extremely in pressure relief device's spout (111), keep away from gas-supply pipe (4) the intercommunication has gas holder (5) on gas-supply pipe (4), install discharge valve (42) on gas-supply pipe (4).

9. The pressure relief system for the emulsion pump station according to claim 8, characterized in that: the air delivery pipe (4) is provided with an electromagnetic valve (43), and the electromagnetic valve (43) is positioned between the exhaust valve (42) and the air storage tank (5).

10. The pressure relief system for the emulsion pump station according to claim 8, characterized in that: and an air compressor (6) for providing high-pressure air for the air storage tank (5) is arranged on the air storage tank (5).