CN112128157A

CN112128157A - Hydraulic control one-way valve for hydraulic support

Info

Publication number: CN112128157A
Application number: CN202010927322.6A
Authority: CN
Inventors: 孙伟; 王维; 梁新魁
Original assignee: Anhui Qianyi Intelligent Equipment Co ltd
Current assignee: Anhui Qianyi Intelligent Equipment Co ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2020-12-25

Abstract

The invention belongs to the technical field of one-way valves, and particularly relates to a hydraulic control one-way valve for a hydraulic support; comprises a valve body; a fixed valve seat is connected in a sliding cavity at one end of the valve body in a threaded manner, and a T-shaped valve rod is arranged in the fixed valve seat in a sliding manner; a valve core is arranged at the top end of the T-shaped valve rod, and a spring is sleeved on the T-shaped valve rod; the fixed disc is fixedly provided with the end part of the T-shaped valve rod, and the outer end surface of the fixed disc is fixedly provided with a convex ball core; the outer wall of the convex spherical core is provided with an annular corrugated groove; an annular corrugated convex layer is arranged at the joint of the communicating cavity and the sliding cavity; the annular corrugated convex layer is clamped in the annular corrugated groove in a sliding manner; a pressure relief sliding seat is connected with the internal thread of the pressure relief cavity, and a guide sliding rod is fixed on the pressure relief sliding seat; a sealing sliding seat is sleeved on the guide sliding rod in a sliding manner, and a push rod is fixed at the end part of the sealing sliding seat; the end part of the ejector rod is in sliding contact with the top end part of the convex spherical core; the work of the hydraulic control single valve is more stable, and the stable supporting effect of the hydraulic support is further improved.

Description

Hydraulic control one-way valve for hydraulic support

Technical Field

The invention belongs to the technical field of check valves, and particularly relates to a hydraulic control check valve for a hydraulic support.

Background

The hydraulic support is one of key devices of a fully mechanized coal mining face of a coal mine, and is a hydraulic power device which generates supporting force by using hydraulic pressure and realizes automatic movement to support and manage a top plate. It can support and control the top plate of the working face reliably and effectively, isolate the goaf and prevent the gangue from entering the stope face.

The hydraulic control one-way valve is one of key elements of the hydraulic support, is usually called as a hydraulic lock, and is usually arranged in a lower cavity of a hydraulic support upright post and a support jack. The actions of the upright post and the supporting jack are controlled: firstly, the hydraulic support upright post and the support jack are controlled to normally extend and contract and keep reasonable working positions; and secondly, liquid in the working cavity is locked, and the supporting force is kept until the safety valve is opened.

And the case and the intercommunication chamber of current liquid accuse check valve are inclined plane, arcwall face or point contact, and then the liquid that receives heavy pressure in the lower oil pocket of stand passes through oil outlet pipe and acts the slip intracavity, and has because the laminating sealing area of case and intercommunication chamber is less, and then leads to the phenomenon that the intracavity liquid that slides produced and reveals, and then has influenced the phenomenon that hydraulic support's stable support.

Disclosure of Invention

In order to make up for the defects of the prior art, the hydraulic control one-way valve for the hydraulic support is mainly used for solving the problems that the valve core and the communicating cavity of the existing hydraulic control one-way valve are in an inclined plane, an arc-shaped surface or point contact, so that when heavy-pressure liquid in the lower oil cavity of the stand column acts into the sliding cavity through the oil outlet pipe, the liquid in the sliding cavity leaks due to the fact that the joint sealing area of the valve core and the communicating cavity is small, and the stable support of the hydraulic support is influenced.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a hydraulic control one-way valve for a hydraulic support, which comprises a valve body; the valve body is provided with a liquid inlet, a liquid outlet and a pressure relief valve port; a sliding cavity is formed in the valve body and communicated with a communicating cavity, and the end part of the communicating cavity is communicated with a pressure relief cavity; a liquid outlet is formed in the side wall of the sliding cavity, and a liquid outlet pipe is connected in the liquid outlet; a fixed valve seat is connected in a sliding cavity at one end of the valve body in a threaded manner, and a T-shaped valve rod is arranged in the fixed valve seat in a sliding manner; a valve core is arranged at the top end of the T-shaped valve rod, and a spring is sleeved on the T-shaped valve rod; the spring is positioned between the valve core and the fixed valve seat; the valve core comprises a fixed disc and a convex ball core; the fixed disc is fixedly provided with the end part of the T-shaped valve rod, and the outer end surface of the fixed disc is fixedly provided with a convex ball core; the convex spherical core is made of wear-resistant rubber materials, and the outer wall of the convex spherical core is provided with an annular corrugated groove; the communicating cavity is of a conical structure, and an annular corrugated protruding layer is arranged at the connecting part of the communicating cavity and the sliding cavity; the annular corrugated convex layer is clamped into the annular corrugated groove in a sliding manner; a liquid inlet is formed in the side wall of the communicating cavity, and a liquid inlet pipe is arranged in the liquid inlet; the pressure relief cavity is internally threaded with a pressure relief sliding seat, and a guide sliding rod is fixed on the pressure relief sliding seat; a sealing sliding seat is sleeved on the guide sliding rod in a sliding manner, and a push rod is fixed at the end part of the sealing sliding seat; the end part of the ejector rod is in sliding contact with the top end part of the convex spherical core; the side wall of the pressure relief cavity is provided with a pressure relief valve port, and the pressure relief valve port is positioned on the outer end face of the sealing sliding seat;

when the hydraulic control one-way valve is connected to a hydraulic support, a liquid inlet is communicated to an emulsion pump station through a liquid inlet pipe, a liquid outlet pipe of the liquid outlet is communicated to a lower oil cavity of a vertical column of the hydraulic support, and a pressure relief valve port is communicated to an oil guide pipe of an upper oil cavity of the vertical column through an oil pipe; when an operating valve of the hydraulic support is positioned at a column lifting position, high-pressure liquid pumped out from an emulsion pump station enters a sliding cavity through a liquid inlet pipe, the high-pressure liquid can play a role of high-pressure pushing on a convex ball core, the convex ball core can push a T-shaped valve rod to slide towards the inside of a fixed valve seat, a spring sleeved on the T-shaped valve rod is in a compression state at the moment, meanwhile, an annular corrugated groove formed in the outer ring wall of the convex ball core can slide away from an annular corrugated convex layer, so that the sliding cavity is communicated with a communication cavity, and the high-pressure liquid can supply high-pressure liquid to a lower oil cavity of the upright column through a liquid outlet pipe, so that the upright column is lifted upwards; when the upright column rises upwards to a required height, the emulsion pump station stops working, the liquid inlet pipe stops supplying high-pressure liquid into the sliding cavity, the convex ball core can be inserted into the communication position between the sliding cavity and the communication cavity under the action of the rebounding force of the spring, and meanwhile, the annular corrugated groove can be clamped on the bulge of the annular corrugated bulge layer in a sliding mode, so that the sealing and fitting effect of the convex ball core and the annular corrugated bulge layer is increased, and the sealing effect of the hydraulic single-phase valve during non-working is further improved; when the stand column is required to descend, high-pressure liquid enters an upper oil cavity of the stand column through an oil guide pipe, meanwhile, the high-pressure liquid enters a pressure relief cavity through the oil pipe, the high-pressure liquid in the pressure relief cavity can push the sealing slide seat to slide towards the position of the convex ball core, the sliding of the sealing slide seat can push the convex ball core to be separated from the joint of the communicating cavity and the sliding cavity through the ejector rod, so that the convex ball core is separated from the sealing of the communicating cavity, and further, the high-pressure liquid in a lower oil cavity of the stand column can flow back to an emulsion pump station through the opened hydraulic single valve, and the stand column can stably descend; through the matching of the annular corrugated groove formed in the convex ball core and the annular corrugated protruding layer arranged at the communication cavity of the conical structure, when the convex ball core is slidably inserted into the communication cavity, the annular corrugated groove can be slidably clamped into the protrusion of the annular corrugated protruding layer, so that the convex ball core and the cavity wall of the communication cavity are in a corrugated sealing and attaching state, the sealing and attaching contact surface of the convex ball core and the annular corrugated protruding layer is further increased, the sealing effect of the convex ball core in the communication cavity is further improved, the phenomenon that liquid in the sliding cavity leaks due to the fact that the bearing force of the stand column of the hydraulic support is too large and the liquid under heavy pressure in the lower oil cavity acts on the sliding cavity through the liquid outlet pipe is avoided, and the phenomenon that the stable support of the hydraulic support is influenced due to the fact that the attaching sealing area of the convex ball core and the communication cavity is small; the intercommunication chamber sets up to the toper structure simultaneously, and when the high-pressure hydraulic pressure in the oil feed pipe entered into the intercommunication intracavity, the intercommunication chamber of toper structure can increase the hydraulic thrust to protruding ball core for protruding ball core can break away from the intercommunication intracavity fast, prevents because the laminating sealing face on annular ripple groove and annular ripple protruding layer is great, and then influences the protruding ball core and open the effect fast.

Preferably, an elastic cavity sac is arranged between the inner part of the fixed valve seat and the T-shaped valve rod and is fixed to the T-shaped valve rod

The bottom end surface of the T-shaped valve rod; the elastic cavity bag is filled with static pressure oil; a plurality of sliding seat cavities are uniformly formed in the end face, in contact with the valve body, of the fixed valve seat, and T-shaped limiting rods are arranged in the sliding seat cavities in a sliding and sealing mode through uniform springs; the T-shaped limiting rods are respectively inserted into a plurality of limiting holes formed in the end face of the valve body in a sliding manner; the sliding seat cavity is communicated with the elastic cavity bag through a guide groove; when the T-shaped valve rod slides downwards along the fixed valve seat, the bottom end face of the T-shaped valve rod extrudes the elastic cavity bag, static pressure oil in the elastic cavity bag is respectively filled into the slide seat cavity through the guide grooves, the static pressure oil filled in the slide seat cavity can push the T-shaped limiting rods to slide out of the slide seat cavity and extend into the limiting holes, and then the T-shaped limiting rods can be respectively and correspondingly inserted into the limiting holes, so that the fixed valve seat can be limited and rotated, the phenomenon that the fixed valve seat in threaded connection slightly rotates due to overlarge flow rate of high-pressure liquid filled in the slide seat cavity is effectively prevented, and the safety sealing effect of the fixed valve seat is further influenced; when the hydraulic control single valve does not work, the synchronous elastic restoring force of the elastic cavity bag and the spring can enable the convex spherical core to be tightly attached to the annular corrugated convex layer, and the sealing effect of the convex spherical core is improved.

Preferably, the inner cavity wall of the liquid outlet is uniformly provided with a plurality of sliding clamping mechanisms, and each sliding clamping mechanism comprises a sealing slide block, an extrusion convex block and a spring; a plurality of chute cavities are uniformly formed in the inner cavity wall of the liquid outlet and are communicated through an annular cavity; sealing sliding blocks are arranged in the sliding groove cavities in a sliding mode through springs, and extrusion convex blocks are fixed on the sealing sliding blocks; the extrusion lugs are extruded onto the liquid outlet pipe in a sliding manner; a liquid guide groove is formed in the top end of the limiting hole on one side of the liquid outlet and is communicated with the annular cavity; the T-shaped limiting rod is provided with a liquid guide hole, and two ends of the liquid guide hole are respectively communicated with the liquid guide groove and the guide groove; when the device works, the T-shaped valve rod is driven by the convex ball core to slide into the sliding cavity, the sliding cavity is communicated with the communicating cavity, static pressure oil in the elastic cavity bag can enter the sliding seat cavity through the guide groove, the T-shaped limiting rod can slide and extend into the limiting hole, meanwhile, the liquid guide hole formed in the T-shaped limiting rod can guide the static pressure oil into the liquid guide groove, the static pressure oil can enter the annular cavity along the liquid guide groove and is shunted into the sliding groove cavity through the annular cavity, the static pressure oil filled in the sliding cavity can push the extrusion protrusion to extrude and attach to the end face of the liquid outlet pipe through the sealing slide block, a plurality of extrusion lugs can play a role in elastic extrusion clamping on the liquid outlet pipe, and the phenomenon that the high-pressure liquid in the sliding cavity impacts the joint of the liquid outlet pipe and the liquid outlet and then causes the liquid outlet to break away from the liquid outlet and further influences the stable liquid guide of the liquid.

Preferably, the cavity wall of the communicating cavity is provided with an annular sliding cavity, and a sliding baffle ring is arranged in the annular sliding cavity in a sliding manner; the inner side wall of the sliding baffle ring is elastically connected to the cavity wall of the annular sliding cavity through an annular air bag; the sliding baffle ring is in sliding contact with the end surface of the sealing sliding seat; during operation, when the pressure release valve port during operation, sealed slide can promote protruding core through the ejector pin and open, liquid in the lower oil cavity can enter into slip chamber and intercommunication intracavity through the drain pipe, the liquid of upwards flowing in the intercommunication intracavity can extrude the slip fender ring, make the slip fender ring upwards slide along annular sliding chamber, after the slip fender ring upwards slides and contacts with the bottom face of sealed slide, annular gasbag is in compression state this moment, and then the slip fender ring can play spacing gliding effect to sealed slide under the thrust of liquid, prevent that the liquid thrust that sealed slide got into at the pressure release valve port is too big, and then lead to the ejector pin to promote protruding core and break away from the intercommunication intracavity completely, and then the liquid accuse check valve appears too fast phenomenon to hydraulic support pressure release easily, influence the steady decline phenomenon of hydraulic support.

Preferably, the inner cavity wall of the liquid inlet is also provided with a plurality of chute cavities, and the chute cavities are communicated through the annular cavity; a plurality of sliding groove cavities of the liquid inlet are also provided with sliding clamping mechanisms; the annular cavity arranged at the liquid inlet is communicated to the interior of the annular air bag through a liquid guide groove; static pressure oil is filled in the annular air bag; the during operation, when the slip fender ring produced the extrusion to annular gasbag, the inside static pressure oil of annular gasbag can enter into the annular intracavity through the cistern, and the spout intracavity that the liquid inlet department set up can be shunted to the static pressure oil of annular intracavity, and the static pressure oil of the slip intracavity of liquid inlet department can promote a plurality of extrusion lugs that liquid inlet department set up and press from both sides tight operation to advancing oil pipe, and then improves and advance oil pipe at the stability and the fastness that the liquid inlet is connected.

Preferably, the other end face of the fixed disc is fixedly provided with an annular extrusion bag, and static pressure oil is filled in the annular extrusion bag; the annular extrusion bag is communicated to the elastic cavity bag through a hydraulic groove formed in the T-shaped valve rod; during operation, when the protruding ball core slides and inserts the intercommunication intracavity, the high-pressure liquid of slip intracavity can play the extrusion force to annular extrusion bag, make the static pressure oil in the annular extrusion bag enter into the elasticity cavity bag, the unnecessary static pressure oil that gets into in the elasticity cavity bag can enter into the spout intracavity that liquid outlet department set up, can make the extrusion lug can extrude the outer wall of laminating the drain pipe, and then can press from both sides tight the fixing to the drain pipe of the liquid accuse check valve after closing, effectively prevent because the bearing capacity that the stand of hydraulic support received is too big, and then lead to the liquid that receives the weight pressure in the lower oil pocket to pass through the drain pipe and use the slip intracavity, the high-pressure liquid of slip chamber can produce the phenomenon of extrusion force to drain pipe and liquid outlet, and then influence the stable connection of drain pipe.

The invention has the following beneficial effects:

1. according to the invention, through the matching of the annular corrugated groove formed in the convex ball core and the annular corrugated convex layer arranged at the communication cavity of the conical structure, when the convex ball core is slidably inserted into the communication cavity, the annular corrugated groove can be slidably clamped into the protrusion of the annular corrugated convex layer, so that the convex ball core and the cavity wall of the communication cavity are in a corrugated sealing and fitting state, further the sealing and fitting contact surface of the convex ball core and the annular corrugated convex layer is increased, the sealing effect of the convex ball core in the communication cavity is further improved, the work of the hydraulic control single valve is more stable, and further the stable supporting effect of the hydraulic support is improved.

2. According to the invention, the communication cavity is of a conical structure, when high-pressure hydraulic pressure in the oil inlet pipe enters the communication cavity, the hydraulic thrust on the convex ball core can be increased by the communication cavity of the conical structure, so that the convex ball core can be quickly separated from the communication cavity, and the phenomenon that the quick opening effect of the convex ball core is influenced because the joint sealing surface of the annular corrugated groove and the annular corrugated convex layer is large is prevented.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 in accordance with the present invention;

in the figure: the valve comprises a valve body 1, a liquid inlet 11, a liquid outlet 12, a chute cavity 121, an annular cavity 122, a pressure relief valve port 13, a sliding cavity 14, a communicating cavity 15, an annular sliding cavity 151, a pressure relief cavity 16, a limiting hole 17, a liquid guide groove 18, a fixed valve seat 2, a sliding seat cavity 21, a guide groove 22, a T-shaped valve rod 3, a valve core 4, a fixed disc 41, a convex ball core 42, an annular corrugated groove 421, an annular corrugated convex layer 5, a pressure relief sliding seat 6, a guide sliding rod 7, a sealing sliding seat 8, a push rod 9, an elastic cavity bag 10, a T-shaped limiting rod 20, a liquid guide hole 201, a sliding clamping mechanism 30, a sealing sliding block 301, an extrusion convex block 302, a sliding baffle ring 40, an annular air bag 50, an annular extrusion bag 60, a liquid outlet pipe.

Detailed Description

A pilot operated check valve for a hydraulic bracket according to an embodiment of the present invention will be described below with reference to fig. 1 to 3.

As shown in fig. 1-3, the hydraulic control check valve for the hydraulic bracket of the invention comprises a valve body 1; the valve body 1 is provided with a liquid inlet 11, a liquid outlet 12 and a pressure relief valve port 13; a sliding cavity 14 is formed in the valve body 1, the sliding cavity 14 is communicated with a communicating cavity 15, and the end part of the communicating cavity 15 is communicated with a pressure relief cavity 16; a liquid outlet 12 is formed in the side wall of the sliding cavity 14, and a liquid outlet pipe 70 is connected in the liquid outlet 12; a fixed valve seat 2 is connected with the inner thread of a sliding cavity 14 at one end part of the valve body 1, and a T-shaped valve rod 3 is arranged in the fixed valve seat 2 in a sliding mode; a valve core 4 is arranged at the top end of the T-shaped valve rod 3, and a spring is sleeved on the T-shaped valve rod 3; the spring is positioned between the valve core 4 and the fixed valve seat 2; the valve core 4 comprises a fixed disc 41 and a convex ball core 42; the fixed disk 41 is fixedly provided with the end part of the T-shaped valve rod 3, and the outer end surface of the fixed disk 41 is fixedly provided with a convex ball core 42; the convex spherical core 42 is made of wear-resistant rubber material, and the outer wall of the convex spherical core 42 is provided with an annular corrugated groove 421; the communicating cavity 15 is of a conical structure, and an annular corrugated protruding layer 5 is arranged at the connecting part of the communicating cavity 15 and the sliding cavity 14; the annular corrugated bump layer 5 is slidably clamped into the annular corrugated groove 421; a liquid inlet 11 is formed in the side wall of the communicating cavity 15, and a liquid inlet pipe 80 is arranged in the liquid inlet 11; a pressure relief sliding seat 6 is connected with the pressure relief cavity 16 through internal threads, and a guide sliding rod 7 is fixed on the pressure relief sliding seat 6; a sealing sliding seat 8 is sleeved on the guide sliding rod 7 in a sliding manner, and a push rod 9 is fixed at the end part of the sealing sliding seat 8; the end part of the ejector rod 9 is in sliding contact with the top end part of the convex ball core 42; a pressure relief valve port 13 is formed in the side wall of the pressure relief cavity 16, and the pressure relief valve port 13 is located on the outer end face of the sealing sliding seat 8;

when the hydraulic control one-way valve is required to be connected to a hydraulic support, the liquid inlet 11 is firstly communicated to an emulsion pump station through the liquid inlet pipe 80, then the liquid outlet pipe 70 of the liquid outlet 12 is communicated to the lower oil cavity of the upright post of the hydraulic support, and meanwhile, the pressure relief valve port 13 is communicated to an oil guide pipe of the upper oil cavity of the upright post through an oil pipe; when an operating valve of the hydraulic support is positioned at a column lifting position, high-pressure liquid pumped out from an emulsion pump station enters the sliding cavity 14 through the liquid inlet pipe 80, the high-pressure liquid can push the convex ball core 42 at a high pressure, the convex ball core 42 can push the T-shaped valve rod 3 to slide towards the inside of the fixed valve seat 2, at the moment, a spring sleeved on the T-shaped valve rod 3 is in a compressed state, meanwhile, an annular corrugated groove 421 arranged on the outer ring wall of the convex ball core 42 can slide away from the annular corrugated convex layer 5, so that the sliding cavity 14 is communicated with the communicating cavity 15, and the high-pressure liquid can supply high-pressure liquid to a lower oil cavity of the column through the liquid outlet pipe 70, so that the column is lifted upwards; when the upright column is lifted upwards to a required height, the emulsion pump station stops working, the liquid inlet pipe 80 stops supplying high-pressure liquid to the sliding cavity 14, the convex spherical core 42 is inserted into the communication position of the sliding cavity 14 and the communication cavity 15 under the action of the rebounding force of the spring, and the annular corrugated groove 421 can be clamped on the bulge of the annular corrugated bulge layer 5 in a sliding manner, so that the sealing and fitting effect of the convex spherical core 42 and the annular corrugated bulge layer 5 is increased, and the sealing effect of the hydraulic one-way valve during non-working is further improved; when the stand column is required to descend, high-pressure liquid enters an upper oil cavity of the stand column through an oil guide pipe, meanwhile, the high-pressure liquid enters a pressure relief cavity 16 through the oil pipe, the high-pressure liquid in the pressure relief cavity 16 can push a sealing slide seat 8 to slide to the position of a convex spherical core 42, the sliding of the sealing slide seat 8 can push the convex spherical core 42 to be separated from the connection part of a communication cavity 15 and a sliding cavity 14 through a push rod 9, so that the convex spherical core 42 is separated from the sealing of the communication cavity 15, and further, the high-pressure liquid in a lower oil cavity of the stand column can flow back to an emulsion pump station through an opened hydraulic single valve, and the stand column can stably descend; further, by the matching of the annular corrugated groove 421 arranged on the convex spherical core 42 and the annular corrugated convex layer 5 arranged at the communication cavity 15 with a conical structure, when the convex spherical core 42 is inserted into the communicating cavity 15 in a sliding way, the annular corrugated groove 421 can be clamped on the bulge of the annular corrugated bulge layer 5 in a sliding way, so that the convex spherical core 42 and the cavity wall of the communicating cavity 15 are in a corrugated sealing fit state, further increasing the sealing and jointing contact surface of the convex spherical core 42 and the annular corrugated convex layer 5, further improving the sealing effect of the convex spherical core 42 in the communicating cavity 15, preventing the overlarge bearing capacity of the upright column of the hydraulic bracket, thereby causing the liquid in the lower oil chamber under heavy pressure to act into the sliding chamber 14 through the liquid outlet pipe 70, and because the joint sealing area of the convex spherical core 42 and the communication chamber 15 is smaller, thereby causing the phenomenon of leakage of the liquid in the sliding cavity 14 and further influencing the stable support of the hydraulic support; simultaneously the intercommunication chamber 15 sets up to the toper structure, and when high-pressure hydraulic pressure in the oil feed pipe entered into the intercommunication chamber 15 in, the intercommunication chamber 15 of toper structure can increase the hydraulic thrust to protruding ball core 42 for protruding ball core 42 can break away from in the intercommunication chamber 15 fast, prevents because annular ripple groove 421 and annular ripple protruding layer 5's the sealed face of laminating is great, and then influences protruding ball core 42 and open the effect fast.

As an embodiment of the invention, an elastic cavity bag 10 is arranged between the inside of the fixed valve seat 2 and the T-shaped valve rod 3, and the elastic cavity bag 10 is fixed to the bottom end face of the T-shaped valve rod 3; the elastic cavity bag 10 is filled with static pressure oil; a plurality of sliding seat cavities 21 are uniformly formed in the end face, in contact with the valve body 1, of the fixed valve seat 2, and T-shaped limiting rods 20 are arranged in the sliding seat cavities 21 in a sliding and sealing mode through springs; the T-shaped limiting rods 20 are respectively inserted into a plurality of limiting holes 17 formed in the end face of the valve body 1 in a sliding manner; the sliding seat cavity 21 is communicated with the elastic cavity bag 10 through a guide groove 22; when the T-shaped valve rod mechanism works, when the T-shaped valve rod 3 slides downwards along the fixed valve seat 2, the bottom end face of the T-shaped valve rod 3 can extrude the elastic cavity bag 10, static pressure oil in the elastic cavity bag 10 can be respectively filled into the sliding seat cavity 21 through the guide grooves 22, the static pressure oil filled in the sliding seat cavity 21 can push the T-shaped limiting rod 20 to slide out of the sliding seat cavity 21 and extend into the limiting hole 17, and then the T-shaped limiting rods 20 can be respectively and correspondingly inserted into the limiting holes 17, so that a limiting rotation effect can be achieved on the fixed valve seat 2, the phenomenon that the fixed valve seat 2 connected through threads slightly rotates due to overlarge flow speed of high-pressure liquid filled in the sliding cavity 14 is effectively prevented, and the safety sealing effect of the fixed valve seat 2 is further influenced; meanwhile, when the hydraulic control single valve does not work, the synchronous elastic restoring force of the elastic cavity bag 10 and the spring enables the convex spherical core 42 to be tightly attached to the annular corrugated convex layer 5, and the sealing effect of the convex spherical core 42 is improved.

As an embodiment of the present invention, a plurality of sliding clamping mechanisms 30 are uniformly arranged on the inner cavity wall of the liquid outlet 12, and each sliding clamping mechanism 30 includes a sealing slider 301, an extrusion protrusion 302 and a spring; a plurality of chute cavities 121 are uniformly formed in the inner cavity wall of the liquid outlet 12, and the chute cavities 121 are communicated through an annular cavity 122; sealing sliding blocks 301 are arranged in the sliding groove cavities 121 in a sliding mode through springs, and extrusion convex blocks 302 are fixed on the sealing sliding blocks 301; a plurality of the extrusion lugs 302 are all extruded onto the liquid outlet pipe 70 in a sliding way; a liquid guide groove 18 is formed at the top end of the limiting hole 17 positioned at one side of the liquid outlet 12, and the liquid guide groove 18 is communicated with the annular cavity 122; the T-shaped limiting rod 20 is provided with a liquid guide hole 201, and two ends of the liquid guide hole 201 are respectively communicated with the liquid guide groove 18 and the guide groove 22; when the device works, when the convex ball core 42 drives the T-shaped valve rod 3 to slide into the sliding cavity 14, so that the sliding cavity 14 is communicated with the communicating cavity 15, the static pressure oil in the elastic cavity bag 10 enters the sliding seat cavity 21 through the guide groove 22, so that the T-shaped limiting rod 20 slides and extends out of the limiting hole 17, meanwhile, the liquid guide hole 201 formed in the T-shaped limiting rod 20 guides the static pressure oil into the liquid guide groove 18, the static pressure oil enters the annular cavity 122 along the liquid guide groove 18, and is shunted into the sliding groove cavity 121 through the annular cavity 122, the static pressure oil filled in the sliding cavity 14 pushes the extrusion protrusion to extrude and attach to the end surface of the liquid outlet pipe 70 through the sealing slider 301, so that the extrusion protrusions 302 can perform an elastic extrusion clamping effect on the liquid outlet pipe 70, thereby effectively preventing the phenomenon that the liquid outlet pipe 70 is separated from the liquid outlet 12 when the high pressure liquid in the sliding cavity 14 impacts the joint of the liquid outlet pipe 70 and the liquid outlet 12, thereby affecting the stable drainage of the effluent pipe 70.

As an embodiment of the present invention, an annular sliding cavity 151 is disposed on a cavity wall of the communicating cavity 15, and a sliding stop ring 40 is slidably disposed inside the annular sliding cavity 151; the inner side wall of the sliding baffle ring 40 is elastically connected to the wall of the annular sliding cavity 151 through an annular air bag 50; the sliding baffle ring 40 is in sliding contact with the end surface of the sealing sliding seat 8; in operation, when the pressure relief valve port 13 is in operation, the sealing slide 8 pushes the convex ball core 42 to open through the ejector rod 9, the liquid in the lower oil chamber enters the sliding chamber 14 and the communicating chamber 15 through the liquid outlet pipe 70, the liquid flowing upward in the communicating chamber 15 pushes the sliding baffle ring 40, so that the sliding baffle ring 40 slides upward along the annular sliding chamber 151, after the sliding stop ring 40 has been slid upwards into contact with the bottom end face of the sealing slide 8, the annular bladder 50 is now in a compressed state, further, the sliding baffle ring 40 can play a role of limiting sliding on the sealing sliding seat 8 under the thrust of the liquid, so as to prevent the sealing sliding seat 8 from entering the pressure relief valve port 13 under the overlarge thrust of the liquid, and then the ejector rod 9 pushes the convex ball core 42 to be completely separated from the communicating cavity 15, so that the phenomenon that the pressure relief of the hydraulic support is too fast by the hydraulic control one-way valve is easy to occur, and the stable descending of the hydraulic support is influenced.

Preferably, the inner cavity wall of the liquid inlet 11 is also provided with a plurality of chute cavities 121, and the chute cavities 121 are all communicated through an annular cavity 122; a sliding clamping mechanism 30 is also arranged in the plurality of sliding groove cavities 121 of the liquid inlet 11; the annular cavity 122 arranged at the liquid inlet 11 is communicated with the interior of the annular air bag 50 through the liquid guide groove 18; the annular air bag 50 is filled with static pressure oil; during operation, when the sliding baffle ring 40 extrudes the annular airbag 50, static pressure oil inside the annular airbag 50 enters the annular cavity 122 through the liquid guide groove 18, the static pressure oil in the annular cavity 122 can be shunted to the sliding groove cavity 121 formed at the liquid inlet 11, and the static pressure oil in the sliding cavity 14 at the liquid inlet 11 can push the plurality of extrusion bumps 302 formed at the liquid inlet 11 to clamp the oil inlet pipe, so that the stability and the firmness of the connection of the oil inlet pipe at the liquid inlet 11 are improved.

As an embodiment of the present invention, an annular pressing bag 60 is fixedly disposed on the other end surface of the fixed disk 41, and the annular pressing bag 60 is filled with static pressure oil; the annular extrusion bag 60 is communicated to the elastic cavity bag 10 through a hydraulic groove formed in the T-shaped valve rod 3; during operation, when the convex ball core 42 is inserted into the communicating cavity 15 in a sliding manner, the high-pressure liquid in the sliding cavity 14 can exert an extrusion force on the annular pressing bag 60, so that the static pressure oil in the annular pressing bag 60 enters the elastic cavity bag 10, the redundant static pressure oil entering the elastic cavity bag 10 can enter the sliding groove cavity 121 formed in the liquid outlet 12, the extrusion bump 302 can extrude and attach to the outer wall of the liquid outlet pipe 70, and the liquid outlet pipe 70 of the closed hydraulic control one-way valve can be clamped and fixed, and therefore the phenomenon that the liquid subjected to heavy pressure in the lower oil cavity acts on the sliding cavity 14 through the liquid outlet pipe 70 due to overlarge bearing force of the upright post of the hydraulic bracket is effectively prevented, and the high-pressure liquid in the sliding cavity 14 can generate an extrusion force on the liquid outlet pipe 70 and the liquid outlet 12, and further the stable connection of the liquid outlet pipe 70 is affected.

The specific working process is as follows:

when the hydraulic control one-way valve is required to be connected to a hydraulic support, the liquid inlet 11 is firstly communicated to an emulsion pump station through the liquid inlet pipe 80, then the liquid outlet pipe 70 of the liquid outlet 12 is communicated to the lower oil cavity of the upright post of the hydraulic support, and meanwhile, the pressure relief valve port 13 is communicated to an oil guide pipe of the upper oil cavity of the upright post through an oil pipe; when an operating valve of the hydraulic support is positioned at a column lifting position, high-pressure liquid pumped out from an emulsion pump station enters the sliding cavity 14 through the liquid inlet pipe 80, the high-pressure liquid can push the convex ball core 42 at a high pressure, the convex ball core 42 can push the T-shaped valve rod 3 to slide towards the inside of the fixed valve seat 2, at the moment, a spring sleeved on the T-shaped valve rod 3 is in a compressed state, meanwhile, an annular corrugated groove 421 arranged on the outer ring wall of the convex ball core 42 can slide away from the annular corrugated convex layer 5, so that the sliding cavity 14 is communicated with the communicating cavity 15, and the high-pressure liquid can supply high-pressure liquid to a lower oil cavity of the column through the liquid outlet pipe 70, so that the column is lifted upwards; when the upright column is lifted upwards to a required height, the emulsion pump station stops working, the liquid inlet pipe 80 stops supplying high-pressure liquid to the sliding cavity 14, the convex spherical core 42 is inserted into the communication position of the sliding cavity 14 and the communication cavity 15 under the action of the rebounding force of the spring, and the annular corrugated groove 421 is clamped on the bulge of the annular corrugated bulge layer 5 in a sliding manner; when the stand is required to descend, high-pressure liquid enters into the upper oil cavity of stand through leading oil pipe, high-pressure liquid can enter into pressure release chamber 16 through oil pipe simultaneously, high-pressure liquid can promote sealed slide 8 and slide to the position of protruding ball core 42 in the pressure release chamber 16, the slip of sealed slide 8 can promote protruding ball core 42 through ejector pin 9 and break away from the junction of intercommunication chamber 15 with sliding chamber 14, make protruding ball core 42 break away from the sealed to intercommunication chamber 15, and then the high-pressure liquid of the lower oil intracavity of stand can flow back to the emulsion pump station in through the hydraulic pressure individual valve of opening, and then the stand of being convenient for carries out the steady decline.

In the description of the present invention, it is to be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A hydraulic control one-way valve for a hydraulic support comprises a valve body (1); a liquid inlet (11), a liquid outlet (12) and a pressure relief valve port (13) are formed in the valve body (1); the method is characterized in that: a sliding cavity (14) is formed in the valve body (1), the sliding cavity (14) is communicated with a communicating cavity (15), and the end part of the communicating cavity (15) is communicated with a pressure relief cavity (16); a liquid outlet (12) is formed in the side wall of the sliding cavity (14), and a liquid outlet pipe (70) is connected in the liquid outlet (12); a fixed valve seat (2) is connected with a sliding cavity (14) at one end of the valve body (1) in a threaded manner, and a T-shaped valve rod (3) is arranged in the fixed valve seat (2) in a sliding manner; a valve core (4) is arranged at the top end of the T-shaped valve rod (3), and a spring is sleeved on the T-shaped valve rod (3); the spring is positioned between the valve core (4) and the fixed valve seat (2); the valve core (4) comprises a fixed disc (41) and a convex ball core (42); the end part of the T-shaped valve rod (3) is fixedly arranged on the fixed disc (41), and a convex ball core (42) is fixed on the outer end surface of the fixed disc (41); the convex spherical core (42) is made of wear-resistant rubber materials, and the outer wall of the convex spherical core (42) is provided with an annular corrugated groove (421); the communicating cavity (15) is of a conical structure, and an annular corrugated convex layer (5) is arranged at the connecting part of the communicating cavity (15) and the sliding cavity (14); the annular corrugated raised layer (5) is clamped into the annular corrugated groove (421) in a sliding manner; a liquid inlet (11) is formed in the side wall of the communicating cavity (15), and a liquid inlet pipe (80) is arranged in the liquid inlet (11); a pressure relief sliding seat (6) is connected with the pressure relief cavity (16) in an internal thread manner, and a guide sliding rod (7) is fixed on the pressure relief sliding seat (6); a sealing sliding seat (8) is sleeved on the guide sliding rod (7) in a sliding manner, and a push rod (9) is fixed at the end part of the sealing sliding seat (8); the end part of the ejector rod (9) is in sliding contact with the top end part of the convex ball core (42); the side wall of the pressure relief cavity (16) is provided with a pressure relief valve port (13), and the pressure relief valve port (13) is positioned on the outer end face of the sealing sliding seat (8).

2. The hydraulic control check valve for the hydraulic bracket according to claim 1, characterized in that: an elastic cavity bag (10) is arranged between the inside of the fixed valve seat (2) and the T-shaped valve rod (3), and the elastic cavity bag (10) is fixed to the bottom end face of the T-shaped valve rod (3); static pressure oil is filled in the elastic cavity bag (10); a plurality of sliding seat cavities (21) are uniformly formed in the end face, in contact with the valve body (1), of the fixed valve seat (2), and T-shaped limiting rods (20) are arranged in the sliding seat cavities (21) in a sliding and sealing mode through uniform springs; the T-shaped limiting rods (20) are respectively inserted into a plurality of limiting holes (17) formed in the end face of the valve body (1) in a sliding manner; the sliding seat cavity (21) is communicated with the elastic cavity bag (10) through a guide groove (22).

3. The hydraulic control check valve for the hydraulic bracket according to claim 2, characterized in that: a plurality of sliding clamping mechanisms (30) are uniformly arranged on the inner cavity wall of the liquid outlet (12), and each sliding clamping mechanism (30) comprises a sealing slide block (301), an extrusion convex block (302) and a spring; a plurality of chute cavities (121) are uniformly formed in the inner cavity wall of the liquid outlet (12), and the chute cavities (121) are communicated through an annular cavity (122); sealing sliding blocks (301) are arranged in the sliding groove cavities (121) in a sliding mode through springs, and extrusion convex blocks (302) are fixed on the sealing sliding blocks (301); the extrusion lugs (302) are all extruded onto the liquid outlet pipe (70) in a sliding way; a liquid guide groove (18) is formed in the top end of the limiting hole (17) located on one side of the liquid outlet (12), and the liquid guide groove (18) is communicated with the annular cavity (122); and the T-shaped limiting rod (20) is provided with a liquid guide hole (201), and two ends of the liquid guide hole (201) are respectively communicated with the liquid guide groove (18) and the guide groove (22).

4. The hydraulic control check valve for the hydraulic bracket according to claim 3, wherein: an annular sliding cavity (151) is formed in the cavity wall of the communicating cavity (15), and a sliding baffle ring (40) is arranged in the annular sliding cavity (151) in a sliding mode; the inner side wall of the sliding baffle ring (40) is elastically connected to the wall of the annular sliding cavity (151) through an annular air bag (50); the sliding baffle ring (40) is in sliding contact with the end surface of the sealing sliding seat (8).

5. The hydraulic control check valve for the hydraulic bracket according to claim 4, wherein: the inner cavity wall of the liquid inlet (11) is also provided with a plurality of chute cavities (121), and the chute cavities (121) are communicated through an annular cavity (122); a sliding clamping mechanism (30) is also arranged in the plurality of sliding groove cavities (121) of the liquid inlet (11); the annular cavity (122) arranged at the liquid inlet (11) is communicated with the interior of the annular air bag (50) through a liquid guide groove (18); and static pressure oil is filled in the annular air bag (50).

6. The hydraulic control check valve for the hydraulic bracket according to claim 5, wherein: an annular extrusion bag (60) is fixedly arranged on the other end face of the fixed disc (41), and static pressure oil is filled in the annular extrusion bag (60); the annular extrusion bag (60) is communicated to the elastic cavity bag (10) through a hydraulic groove formed in the T-shaped valve rod (3).