CN212535717U - Upright post valve for coal mine hydraulic support - Google Patents
Upright post valve for coal mine hydraulic support Download PDFInfo
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- CN212535717U CN212535717U CN202021865465.0U CN202021865465U CN212535717U CN 212535717 U CN212535717 U CN 212535717U CN 202021865465 U CN202021865465 U CN 202021865465U CN 212535717 U CN212535717 U CN 212535717U
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Abstract
The utility model discloses a stand valve that colliery hydraulic support used, including valve body, check valve subassembly and relief valve subassembly. The valve body is provided with a first valve port communicated with the liquid supply/return component, a second valve port communicated with the lower cavity of the upright post, a first valve cavity, a second valve cavity, a first valve passage communicated with the first valve cavity and the first valve port, a second valve passage communicated with the first valve cavity and the second valve port, a third valve passage communicated with the second valve cavity and the first valve port, and a fourth valve passage communicated with the second valve cavity and the second valve port. The single valve assembly is arranged in the first valve cavity, and when the one-way valve assembly is opened or closed, the corresponding first valve passage and the corresponding second valve passage are communicated or closed. The safety valve component is arranged in the second valve cavity, and when the safety valve component is opened or closed, the corresponding third valve channel and the corresponding fourth valve channel are mutually communicated or mutually sealed. This stand valve transships when releasing pressure and returns liquid and arrange to supply/return liquid part, has realized the cyclic utilization of liquid, and has avoided addding external pipeline and lead to the problem that influences the support use after difficult installation and installation.
Description
Technical Field
The utility model relates to a colliery support technical field especially relates to a stand valve that colliery hydraulic support used.
Background
A coal mine hydraulic support is a commonly used support device in a coal mine fully mechanized mining process. The hydraulic support comprises a base, a top beam, a shield beam, an upright post, a pushing device and the like. The upright posts are hydraulic cylinders supported between the base and the top beam or the shield beam and used for adjusting the height of the support and bearing load.
Specifically, a piston rod (also called a plunger) of the upright column is connected with the top beam or the shield beam, and a lower cavity of the upright column is communicated with the liquid supply/return component. When the liquid supply/return component is used for supplying liquid to the lower cavity of the upright post, the plunger moves upwards and the height of the bracket is increased, and when the hydraulic control opening component works, the lower cavity of the upright post returns liquid to the liquid supply/return component, the plunger moves downwards and the height of the bracket is reduced. The upright post is provided with an upright post valve, the upright post valve comprises a safety valve component and a one-way valve component, the one-way valve component is used for blocking liquid in the lower cavity of the upright post in the bearing process from flowing back to the liquid supply part, and the safety valve component is used for relieving pressure of the lower cavity of the upright post when the upright post is overloaded so as to prevent the upright post from being damaged by overload.
In the prior art, when the lower cavity of the upright post is overloaded and decompressed, liquid is directly discharged to the underground through the upright post safety valve, so that liquid waste and environmental pollution are caused. In addition, as the liquid is discharged outside, new liquid needs to be continuously supplemented to keep the normal work of the bracket, so that the operation cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the liquid is directly discharged to the underground to cause when the lower cavity of the stand is overloaded and decompressed.
In order to solve the technical problem, the utility model provides a stand valve that colliery hydraulic support used, include:
the valve body is provided with a first valve port for communicating a liquid supply/return component, a second valve port for communicating a lower cavity of the upright post, a first valve cavity, a second valve cavity, a first valve passage for communicating the first valve cavity with the first valve port, a second valve passage for communicating the first valve cavity with the second valve port, a third valve passage for communicating the second valve cavity with the first valve port, and a fourth valve passage for communicating the second valve cavity with the second valve port;
the check valve assembly is arranged in the first valve cavity, when the check valve assembly is opened, the first valve channel and the second valve channel are communicated with each other, and when the check valve assembly is closed, the first valve channel and the second valve channel are closed with each other;
and the safety valve assembly is arranged in the second valve cavity, when the safety valve assembly is opened, the third valve channel and the fourth valve channel are communicated with each other, and when the safety valve assembly is closed, the third valve channel and the fourth valve channel are closed with each other.
Further, the second valve cavity is a traveling cavity, the third valve passage is communicated with the circumferential surface of the second valve cavity, and the fourth valve passage is communicated with one end of the second valve cavity;
the safety valve assembly comprises a safety valve sleeve and a safety valve spool, the safety valve sleeve is hermetically mounted in the second valve cavity, the safety valve spool is mounted in the safety valve sleeve, a third through hole communicated with the third valve channel is formed in the peripheral wall of the safety valve sleeve, a counter bore is formed in the end face, close to the fourth valve channel, of the safety valve spool, a fourth through hole communicated with the fourth valve channel is formed in the peripheral wall of the counter bore, the safety valve spool can move in the axial direction of the safety valve sleeve, and the third through hole and the fourth through hole are communicated or closed in the moving process.
Furthermore, the safety valve spool is provided with an equal-diameter cylindrical section, and the third through hole is always positioned between two end faces of the equal-diameter cylindrical section.
Further, one end of the safety valve sleeve, which is far away from the fourth valve passage, is provided with a safety valve elastic element, and the safety valve elastic element is used for applying elastic force to the safety valve core so as to drive the safety valve core to move towards the direction close to the fourth valve passage.
Furthermore, one end of the safety valve sleeve, which is close to the fourth valve passage, is provided with a safety valve sealing ring and a safety pressing sleeve for pressing the safety valve sealing ring, and the safety pressing sleeve is in threaded connection with the safety valve sleeve; the valve body is provided with a threaded connecting hole for connecting a plug, one end of the threaded connecting hole is communicated with the surface of the valve body, and the other end of the threaded connecting hole is opposite to the safe pressing sleeve, so that the safe pressing sleeve is exposed through the threaded connecting hole when the plug is detached.
Further, the first valve cavity is a cavity, and the first valve passage and the second valve passage are communicated with the circumferential surface of the first valve cavity;
the check valve assembly comprises a check valve sleeve and a check valve spool, the check valve sleeve is mounted in the first valve cavity in a sealing mode, the check valve spool is mounted in the check valve sleeve in the sealing mode, a first through hole communicated with the first valve channel, a second through hole communicated with the second valve channel and a first sealing surface located between the first through hole and the second through hole are formed in the peripheral wall of the check valve sleeve, the check valve spool is provided with a second sealing surface, the check valve spool can move in the axial direction of the check valve sleeve, and the first sealing surface is in contact with or separated from the second sealing surface in the moving process, so that a sealing strip formed by the first sealing surface and the second sealing surface is sealed or opened.
Further, the check valve assembly further comprises a check valve elastic member, and the check valve elastic member is used for applying a reset force to the check valve core so as to drive the check valve core to move towards the direction close to the first sealing surface.
Furthermore, the check valve assembly further comprises a hydraulic control opening component, and the hydraulic hole opening component is used for driving the check valve core to move towards the direction far away from the first sealing surface so as to open the check valve assembly and enable the upright column to discharge liquid outwards.
Further, the first valve cavity and the second valve cavity are both traveling cavity cavities; the first valve cavity is provided with a first valve passage, the second valve cavity is provided with a second valve passage, the first valve passage is arranged on one side of the first valve cavity far away from the second valve cavity, the second valve passage is arranged on one side of the first valve cavity near the second valve cavity, the third valve passage is arranged between the first valve cavity and the second valve cavity and is communicated with the first valve cavity and the second valve cavity, and the fourth valve passage is arranged near the end of the second valve cavity and is communicated with the second valve passage.
Furthermore, the valve body is also provided with a plurality of connecting through holes for bolts to penetrate through, the valve body is connected with the upright post through the bolts, and the connecting through holes are perpendicular to the plane where the second valve port is located.
The utility model provides a stand valve has following technological effect:
(1) the liquid is recycled, and a series of defects caused by discharging the liquid to the underground are avoided.
(2) Any external pipeline is not additionally arranged, so that the problems that the structure is complex and the size is large due to the additional arrangement of the external pipeline, the installation is difficult, and the use of the bracket is influenced after the installation are solved.
(3) The back pressure of the liquid supply/return component can be prevented from acting on the valve core of the safety valve in the form of axial force, and the safety valve component is beneficial to accurate opening and closing.
(4) The quick-wear safety valve sealing ring can be replaced quickly, the elastic part of the safety valve does not need to be detached in the replacement process, and the complex step of adjusting the elastic force of the elastic part of the safety valve is omitted.
(5) The whole structure is compact and the volume is small.
Drawings
Fig. 1 is a cross-sectional view of one embodiment of a pillar valve provided by the present invention;
FIG. 2 is a cross-sectional view of the valve body
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a schematic view of the safety valve assembly in a closed condition;
fig. 5 is a schematic view of the safety valve assembly in an open state.
The reference numerals are explained below:
10 valve body, 101 first valve port, 102 second valve port, 103 first valve chamber, 104 second valve chamber, 105 first valve channel, 106 second valve channel, 107 third valve channel, 108 fourth valve channel;
20 a check valve assembly, 21 a check valve sleeve, 211 a first through hole, 212 a second through hole, 213 a first sealing surface, 22 a check valve core, 221 a second sealing surface, 23 a check valve elastic part, 24 a hydraulic control opening part;
30, a safety valve component, 31, a safety valve sleeve, 311, a third through hole, 32, a safety valve core, 321 a counter bore, 322, a fourth through hole, 323, an equal-diameter cylindrical section, 33, a safety valve sealing ring, 34, a safety pressure sleeve and 35, wherein the safety valve elastic element is arranged on the safety valve core;
and 40, plugging.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following provides a detailed description of the technical solution of the present invention with reference to the accompanying drawings.
As shown in fig. 1-3, the spool valve includes a valve body 10, a check valve assembly 20, and a relief valve assembly 30.
The valve body 10 is provided with a first valve port 101 and a second valve port 102, when in use, the first valve port 101 is communicated with the liquid supply part, and the second valve port 102 is communicated with the lower cavity of the upright post.
The valve body 10 is further provided with a first valve chamber 103 and a second valve chamber 104, the check valve assembly 20 is installed in the first valve chamber 103, and the relief valve assembly 30 is installed in the second valve chamber 104.
The valve body 10 is also provided with a first valve passage 105 and a second valve passage 106. The first valve passage 105 communicates the first valve chamber 103 with the first valve port 101, and the second valve passage 106 communicates the first valve chamber 103 with the second valve port 102. The first and second valve passages 105 and 106 communicate with each other when the check valve assembly 20 is opened, and the first and second valve passages 105 and 106 are closed with each other when the check valve assembly 20 is closed.
The valve body 10 is also provided with a third valve passage 107 and a fourth valve passage 108. The third valve passage 107 communicates the second valve chamber 104 with the first valve port 101, and the fourth valve passage 108 communicates the second valve chamber 104 with the second valve port 102. The third and fourth valve passages 107, 108 communicate with each other when the safety valve assembly 30 is open, and the third and fourth valve passages 107, 108 are closed off when the safety valve assembly 30 is closed.
According to the arrangement, when the vertical column is overloaded and the pressure of the lower cavity of the vertical column needs to be relieved, the safety valve assembly 30 is opened, liquid in the lower cavity of the vertical column flows back to the liquid supply part through the fourth valve channel 108 and the third valve channel 107, and is not discharged to the underground, so that the cyclic utilization of the liquid is realized, and a series of defects caused by the fact that the liquid is discharged to the underground are avoided. In addition, any external pipeline is not additionally arranged, so that the problems that the structure is complex and the size is large, and the use of the bracket is difficult to install and is influenced after the installation due to the fact that the external pipeline is additionally arranged are solved.
Specifically, as shown in fig. 1, the first valve chamber 103 and the second valve chamber 104 are both pilot chambers. The row hole cavity is a long strip-shaped cavity with a plurality of holes on the peripheral wall. The first valve chamber 103 is provided with a first valve passage 105 on a side away from the second valve chamber 104, and the second valve passage 106 is provided on a side of the first valve chamber 103 close to the second valve chamber 104. The third valve passage 107 is provided between the first valve chamber 103 and the second valve chamber 104 and communicates the first valve chamber 103 and the second valve chamber 104. A fourth valve passage 108 is disposed adjacent one end of the second valve chamber 104 and communicates with the second valve passage 106. The arrangement makes the upright post valve compact and small.
Specifically, as shown in fig. 1 to 3, the valve body 10 is further provided with a plurality of connecting through holes, and when in use, bolts are screwed on the columns after passing through the connecting through holes. As shown in fig. 3, the connecting through hole is perpendicular to the plane of the second valve port 102, so that the plane of the second valve port 102 and the plane of the cavity opening of the lower cavity of the pillar can be in tight contact with each other under the fastening force of the bolt, so as to prevent the contact position between the two from leaking, as shown in fig. 3, in a specific embodiment, a sealing member is further disposed at the contact position between the two.
Specifically, as shown in fig. 1, the first valve chamber 103 is a linear bore, and the first valve passage 105 and the second valve passage 106 are both communicated with a circumferential surface of the first valve chamber 103.
As shown in fig. 1, the check valve assembly 20 includes a check valve sleeve 21. The check valve sleeve 21 is sealingly mounted in the first valve chamber 103, and in detail, an outer circumferential surface of the check valve sleeve 21 is in sealing contact with a circumferential surface of the first valve chamber 103 through a seal ring. The circumferential wall of the check valve sleeve 21 is provided with a first through hole 211 communicating with the first valve passage 105, a second through hole 212 communicating with the second valve passage 106, and a first sealing surface 213 located between the first through hole 211 and the second through hole 212.
As shown in FIG. 1, the check valve assembly 20 also includes a check valve spool 22. The check valve core 22 is mounted on the check valve sleeve 21 and can move along the axial direction of the check valve sleeve 21, one end of the check valve core 22 close to the first through hole 211 is provided with a second sealing surface 221, and the first sealing surface 213 and the second sealing surface 221 can be in sealing contact or separated in the moving process of the check valve core 22. When the first sealing surface 213 is in sealing contact with the second sealing surface 221 (see fig. 1), the check valve assembly 20 is closed, the first through hole 211 and the second through hole 212 are closed, and the first valve passage 105 and the second valve passage 106 are closed. When the first sealing surface 213 is separated from the second sealing surface 221, the check valve assembly 20 is opened, the first through hole 211 and the second through hole 212 are communicated with each other, and the first valve passage 105 and the second valve passage 106 are communicated with each other.
As shown in fig. 1, the check valve assembly 20 further includes a check valve elastic member 23, and the check valve elastic member 23 is configured to apply an elastic force to the check valve core 22 to drive the check valve core 22 to move in a direction approaching the first sealing surface 213.
As shown in fig. 1, the check valve assembly 20 further includes a pilot-operated opening member 24, and the pilot-operated opening member 24 is used for driving the check valve spool 22 to move away from the first sealing surface 213 so as to open the check valve assembly 20 by an external force.
The operating principle of the check valve assembly 20 is:
when liquid is added to the lower cavity of the upright column, the axial force applied to one end of the one-way valve core 22, which is provided with the second sealing surface 221, is greater than the axial force applied to the other end of the one-way valve core, and the one-way valve core 22 automatically moves in the direction away from the first sealing surface 213 under the hydraulic action, so that the one-way valve assembly 20 is automatically opened;
when the upright column bears, the axial force borne by one end of the one-way valve core 22, which is provided with the second sealing surface 221, is smaller than the axial force borne by the other end of the one-way valve core 22, and the one-way valve core 22 is tightly contacted with the first sealing surface 213 under the action of hydraulic pressure and the one-way valve elastic part 23, so that liquid in the lower cavity of the upright column can be prevented from flowing back to the liquid supply part, and the bearing stability is ensured;
when the height of the bracket needs to be reduced, the hydraulic control force opening component 24 drives the check valve core 22, so that the check valve core 22 overcomes the elastic force of the check valve elastic component 23 and the pressure of the lower cavity of the upright column to move in the direction away from the first sealing surface 213, the check valve component 20 is opened, and at the moment, the liquid in the lower cavity of the upright column flows back to the liquid supply component through the second valve channel 106 and the first valve channel 105, and the liquid reduction of the lower cavity of the upright column is realized. It should be noted that the liquid reduction of the lower cavity of the upright column is performed in the non-bearing process of the upright column, and the bearing of the upright column is not affected.
Specifically, as shown in fig. 1, the second valve chamber 104 is also a traveling chamber, the third valve passage 107 communicates with a circumferential surface of the second valve chamber 104, and the fourth valve passage 108 communicates with one end of the second valve chamber 104.
As shown in fig. 1, the relief valve assembly 30 includes a relief valve sleeve 31, the relief valve sleeve 31 is sealingly mounted to the second valve chamber 104, and in detail, an outer circumferential surface of the relief valve sleeve 31 is in sealing contact with a circumferential surface of the second valve chamber 104 through a seal ring. The relief valve sleeve 31 has a third through hole 311 in a peripheral wall thereof, which communicates with the third valve passage 107.
As shown in fig. 1, the relief valve assembly 30 also includes a relief valve spool 32. The relief valve spool 32 is sealingly attached to the relief valve sleeve 31, and in detail, an outer peripheral surface of the relief valve spool 32 is sealingly contacted with an inner peripheral surface of the relief valve sleeve 31 via a seal ring. A counter bore 321 is arranged on the end face of the safety valve core 32 close to one end of the fourth valve passage 108, a fourth through hole 322 is arranged on the peripheral wall of the counter bore 321, and the fourth through hole 322 is communicated with the fourth valve passage 108 through the counter bore 321. The relief valve spool 32 can move in the axial direction of the relief valve sleeve 31, and the third through hole 311 and the fourth through hole 322 can overlap or be misaligned during movement of the relief valve spool 32. As shown in fig. 4, when the third through hole 311 is misaligned with the fourth through hole 322, the relief valve assembly 30 is closed, and the third valve passage 107 and the fourth valve passage 108 are closed. As shown in fig. 5, when the third through hole 311 overlaps the fourth through hole 322, the relief valve assembly 30 is opened, and the third valve passage 107 and the fourth valve passage 108 communicate with each other.
As shown in fig. 1, the relief valve assembly 30 further includes a relief valve elastic member 35, and the relief valve elastic member 35 is mounted at an end of the relief valve sleeve 31 remote from the fourth valve passage 108, and is configured to apply an elastic force to the relief valve spool 32 to drive the relief valve spool 32 to move in a direction approaching the fourth valve passage 108. The relief valve spool 32 receives not only the elastic force but also the hydraulic force from the column lower cavity, and when the elastic force received by the relief valve spool 32 is balanced with the hydraulic force, the relief valve spool 32 does not move.
The working principle of the safety valve assembly 30 is as follows:
when the pressure in the lower cavity of the upright column is increased due to the increase of the load of the upright column, the hydraulic pressure applied to the valve core 32 of the safety valve is greater than the elastic force, so that the valve core 32 of the safety valve moves towards the direction far away from the fourth valve passage 108, at the moment, the third through hole 311 and the fourth through hole 322 are gradually overlapped and conducted, after the conduction, the liquid in the lower cavity of the upright column flows back to the liquid supply part through the fourth valve passage 108 and the third valve passage 107, the pressure in the lower cavity of the upright column is reduced, and the overload;
when the pressure in the lower cavity of the column is reduced to be less than or equal to the elastic force applied to the safety valve spool 32, the safety valve spool 32 moves towards the direction close to the fourth valve passage 108, so that the third through hole 311 and the fourth through hole 322 are gradually staggered and closed, and at this time, the liquid in the lower cavity of the column is closed.
Preferably, as shown in fig. 1, the relief valve spool 32 has a cylindrical section 323, and the outer diameters of the cross sections of the cylindrical section 323 are the same, i.e., the cylindrical section 323 is a cylindrical section with a constant diameter. The third through hole 311 is always located between two end surfaces of the cylindrical section 323, that is, when the safety valve spool 32 moves within a predetermined range, the third through hole 311 is located between two end surfaces of the cylindrical section 323. Therefore, the back pressure of the liquid supply part can be prevented from acting on the safety valve spool 32 in the form of axial force, and the safety valve assembly 30 can be opened and closed accurately.
Preferably, as shown in fig. 1, one end of the safety valve sleeve 31 near the fourth valve passage 108 is provided with a safety valve sealing ring 33 and a safety pressure sleeve 34 for pressing the safety valve sealing ring 33, the safety pressure sleeve 34 is in threaded connection with the safety valve sleeve 31, and the safety valve sealing ring 33 is a wearing part and needs to be replaced frequently. The valve body 10 is provided with a plug 40, and in detail, the valve body 10 is provided with a screw coupling hole, one end of which is penetrated through the surface of the valve body 10 and the other end is opposed to the safety sleeve 34, and the plug 40 is screwed into the screw coupling hole. With the arrangement, when the plug 40 is detached, the safety pressure sleeve 34 is exposed through the threaded connecting hole, so that the safety pressure sleeve 34 can be detached and the safety valve sealing ring 33 can be replaced conveniently, the safety valve elastic part 35 does not need to be detached in the replacement process, and the complicated step of adjusting the elastic force of the safety valve elastic part 35 is omitted.
It is right above the utility model provides a stand valve that colliery hydraulic support used has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. Pillar valve that colliery hydraulic support used, its characterized in that includes:
the valve body (10) is provided with a first valve port (101) used for communicating a liquid supply/return component, a second valve port (102) used for communicating a lower cavity of a column, a first valve cavity (103), a second valve cavity (104), a first valve passage (105) communicating the first valve cavity (103) with the first valve port (101), a second valve passage (106) communicating the first valve cavity (103) with the second valve port (102), a third valve passage (107) communicating the second valve cavity (104) with the first valve port (101), and a fourth valve passage (108) communicating the second valve cavity (104) with the second valve port (102);
the check valve assembly (20) is arranged in the first valve cavity (103), when the check valve assembly (20) is opened, the first valve passage (105) and the second valve passage (106) are communicated with each other, and when the check valve assembly (20) is closed, the first valve passage (105) and the second valve passage (106) are closed with each other;
the safety valve assembly (30) is arranged in the second valve cavity (104), when the safety valve assembly (30) is opened, the third valve channel (107) and the fourth valve channel (108) are communicated with each other, and when the safety valve assembly (30) is closed, the third valve channel (107) and the fourth valve channel (108) are closed with each other.
2. The post valve of claim 1, wherein the second valve chamber (104) is a travel bore chamber, the third valve passage (107) is through the circumferential face of the second valve chamber (104), and the fourth valve passage (108) is through one end of the second valve chamber (104);
the safety valve assembly (30) comprises a safety valve sleeve (31) which is hermetically mounted in the second valve cavity (104) and a safety valve spool (32) which is mounted in the safety valve sleeve (31), a third through hole (311) communicated with the third valve channel (107) is formed in the peripheral wall of the safety valve sleeve (31), a counter bore (321) is formed in the end face, close to the fourth valve channel (108), of the safety valve spool (32), a fourth through hole (322) communicated with the fourth valve channel (108) is formed in the peripheral wall of the counter bore (321), the safety valve spool (32) can move in the axial direction of the safety valve sleeve (31), and the third through hole (311) and the fourth through hole (322) are communicated or closed in the moving process.
3. The pillar valve according to claim 2, wherein the relief valve spool (32) has a constant diameter cylindrical section (323), and the third through hole (311) is always located between both end surfaces of the constant diameter cylindrical section (323).
4. The pillar valve according to claim 2, wherein an end of the relief valve sleeve (31) remote from the fourth valve passage (108) is provided with a relief valve elastic member (35), and the relief valve elastic member (35) is configured to apply an elastic force to the relief valve spool (32) to drive the relief valve spool (32) to move in a direction approaching the fourth valve passage (108).
5. The stem valve according to claim 4, characterized in that the safety valve sleeve (31) is provided with a safety valve sealing ring (33) and a safety pressing sleeve (34) for pressing the safety valve sealing ring (33) at one end close to the fourth valve passage (108), and the safety pressing sleeve (34) is in threaded connection with the safety valve sleeve (31); the valve body (10) is provided with a threaded connection hole for connecting the plug (40), one end of the threaded connection hole is communicated with the surface of the valve body (10), and the other end of the threaded connection hole is opposite to the safety pressure sleeve (34), so that the safety pressure sleeve (34) is exposed through the threaded connection hole when the plug (40) is detached.
6. A pillar valve according to any of claims 1-5, characterized in that the first valve chamber (103) is a row bore chamber, the first valve passage (105) and the second valve passage (106) both communicating with a circumferential face of the first valve chamber (103);
the check valve assembly (20) comprises a check valve sleeve (21) which is arranged in the first valve cavity (103) in a sealing way and a check valve core (22) which is arranged in the check valve sleeve (21) in a sealing way, a first through hole (211) communicated with the first valve channel (105), a second through hole (212) communicated with the second valve channel (106) and a first sealing surface (213) positioned between the first through hole (211) and the second through hole (212) are arranged on the peripheral wall of the one-way valve sleeve (21), the check valve core (22) is provided with a second sealing surface (221), the check valve core (22) can move along the axial direction of the check valve sleeve (21), the first sealing surface (213) is contacted with or separated from the second sealing surface (221) during the movement, so that the sealing strip formed by the first sealing surface (213) and the second sealing surface (221) is sealed or unsealed.
7. The spool valve of claim 6, wherein the check valve assembly (20) further comprises a check valve elastic member (23), the check valve elastic member (23) being configured to apply a return force to the check valve spool (22) to drive the check valve spool (22) to move in a direction approaching the first sealing surface (213).
8. The post valve of claim 6 wherein the check valve assembly (20) further comprises a pilot operated opening member (24), the pilot operated opening member (24) being adapted to drive the check valve spool (22) in a direction away from the first sealing surface (213) to open the check valve assembly (20) to drain the post outwardly.
9. A pillar valve according to any one of claims 1-5, characterized in that the first valve chamber (103) and the second valve chamber (104) are both row bore chambers; the first valve passage (105) is arranged on one side, far away from the second valve cavity (104), of the first valve cavity (103), the second valve passage (106) is arranged on one side, close to the second valve cavity (104), of the first valve cavity (103), the third valve passage (107) is arranged between the first valve cavity (103) and the second valve cavity (104) and communicated with the first valve cavity (103) and the second valve cavity (104), and the fourth valve passage (108) is arranged near the end of the second valve cavity (104) and communicated with the second valve passage (106).
10. A pillar valve according to any one of claims 1-5, characterized in that the valve body (10) is further provided with a plurality of connecting through holes for bolts to pass through, the valve body (10) being connected to the pillar by means of the bolts, the connecting through holes being perpendicular to the plane of the second valve port (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021865465.0U CN212535717U (en) | 2020-08-31 | 2020-08-31 | Upright post valve for coal mine hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021865465.0U CN212535717U (en) | 2020-08-31 | 2020-08-31 | Upright post valve for coal mine hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212535717U true CN212535717U (en) | 2021-02-12 |
Family
ID=74529278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021865465.0U Active CN212535717U (en) | 2020-08-31 | 2020-08-31 | Upright post valve for coal mine hydraulic support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212535717U (en) |
-
2020
- 2020-08-31 CN CN202021865465.0U patent/CN212535717U/en active Active
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