Column valve for hydraulic support in coal mines

Abstract

The invention discloses a column valve for a coal mine hydraulic support, comprising a valve body, a one-way valve assembly and a safety valve assembly. The valve body is provided with a first valve port connected to a supply / return liquid component, a second valve port connected to a column lower cavity, a first valve cavity, a second valve cavity, a first valve channel connected to the first valve cavity and the first valve port, a second valve channel connected to the first valve cavity and the second valve port, a third valve channel connected to the second valve cavity and the first valve port, and a fourth valve channel connected to the second valve cavity and the second valve port. The one-way valve assembly is installed in the first valve cavity, and when the one-way valve assembly is opened or closed, the corresponding first valve channel and the second valve channel are mutually connected or mutually closed. The safety valve assembly is installed in the second valve cavity, and when the safety valve assembly is opened or closed, the corresponding third valve channel and the fourth valve channel are mutually connected or mutually closed. When the column valve is overloaded and pressure-relieved, the liquid is discharged back to the supply / return liquid component, thereby realizing the recycling of the liquid and avoiding the problem of difficult installation caused by adding an external pipeline and affecting the use of the support after installation.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine supports, in particular to a column valve for a coal mine hydraulic support. Background Art

[0002] Coal mine hydraulic support is a commonly used support equipment in the comprehensive mining process of coal mines. The hydraulic support includes a base, a top beam, a shield beam, a column, a push device and other components. The column is a hydraulic cylinder supported between the base and the top beam or shield beam, which is used to adjust the height of the support and carry the load.

[0003] Specifically, the piston rod (also called the piston) of the column is connected to the top beam or the shield beam, and the lower cavity of the column is connected to the liquid supply / return component. When the liquid supply / return component feeds liquid into the lower cavity of the column, the piston moves upward, and the height of the bracket increases. When the hydraulic control opening component works, the lower cavity of the column returns liquid to the liquid supply / return component, the piston moves downward, and the height of the bracket decreases. A column valve is installed on the column, and the column valve includes a safety valve assembly and a one-way valve assembly. The one-way valve assembly is used to prevent the liquid in the lower cavity of the column from flowing back to the liquid supply component during the load-bearing process. The safety valve assembly is used to relieve pressure in the lower cavity of the column when the column is overloaded to prevent the column from being overloaded and damaged.

[0004] In the prior art, when the lower chamber of the column is overloaded and depressurized, the liquid is directly discharged to the ground through the column safety valve, resulting in liquid waste and environmental pollution. In addition, due to the discharge of liquid, new liquid needs to be continuously added to maintain the normal operation of the support, resulting in increased operating costs. Summary of the invention

[0005] The purpose of the invention is to solve the problem that liquid is directly discharged to the ground when the lower cavity of the column is overloaded and depressurized.

[0006] In order to solve the above technical problems, the present invention provides a column valve for a coal mine hydraulic support, comprising:

[0007] A valve body, the valve body is provided with a first valve port for communicating with a liquid supply / return component, a second valve port for communicating with a lower cavity of a column, a first valve cavity, a second valve cavity, a first valve passage communicating with the first valve cavity and the first valve port, a second valve passage communicating with the first valve cavity and the second valve port, a third valve passage communicating with the second valve cavity and the first valve port, and a fourth valve passage communicating with the second valve cavity and the second valve port;

[0008] a one-way valve assembly, wherein the one-way valve assembly is installed in the first valve chamber, and when the one-way valve assembly is opened, the first valve channel and the second valve channel are connected to each other, and when the one-way valve assembly is closed, the first valve channel and the second valve channel are closed to each other;

[0009] A safety valve assembly is installed in the second valve chamber. When the safety valve assembly is opened, the third valve channel and the fourth valve channel are connected to each other. When the safety valve assembly is closed, the third valve channel and the fourth valve channel are closed to each other.

[0010] Further, the second valve cavity is a perforated cavity, the third valve channel is connected to the circumferential surface of the second valve cavity, and the fourth valve channel is connected to one end of the second valve cavity;

[0011] The safety valve assembly includes a safety valve sleeve sealed and installed in the second valve chamber and a safety valve core installed in the safety valve sleeve. A third through hole communicating with the third valve channel is provided on the peripheral wall of the safety valve sleeve. A countersunk hole is provided on the end surface of the safety valve core close to the fourth valve channel. A fourth through hole communicating with the fourth valve channel is provided on the peripheral wall of the countersunk hole. The safety valve core can move along the axial direction of the safety valve sleeve. During the movement, the third through hole and the fourth through hole are connected or closed.

[0012] Furthermore, the valve core of the safety valve has a cylindrical section of equal diameter, and the third through hole is always located between the two end surfaces of the cylindrical section of equal diameter.

[0013] Furthermore, a safety valve elastic member is mounted on one end of the safety valve sleeve away from the fourth valve channel, and the safety valve elastic member is used to apply elastic force to the safety valve core to drive the safety valve core to move toward the fourth valve channel.

[0014] Furthermore, a safety valve sealing ring and a safety sleeve for compressing the safety valve sealing ring are installed at one end of the safety valve sleeve close to the fourth valve channel, and the safety sleeve is threadedly connected to the safety valve sleeve; the valve body is provided with a threaded connection hole for connecting a plug, one end of the threaded connection hole penetrates the surface of the valve body, and the other end is opposite to the safety sleeve, so that the safety sleeve is exposed through the threaded connection hole when the plug is removed.

[0015] Furthermore, the first valve cavity is a perforated cavity, and the first valve channel and the second valve channel are both connected to the circumferential surface of the first valve cavity;

[0016] The one-way valve assembly includes a one-way valve sleeve sealingly installed in the first valve cavity and a one-way valve core sealingly installed in the one-way valve sleeve. The peripheral wall of the one-way valve sleeve is provided with a first through hole communicating with the first valve channel, a second through hole communicating with the second valve channel, and a first sealing surface located between the first through hole and the second through hole. The one-way valve core is provided with a second sealing surface. The one-way valve core can move along the axial direction of the one-way valve sleeve. During the movement, the first sealing surface contacts or separates from the second sealing surface, thereby sealing or opening the sealing band formed by the first sealing surface and the second sealing surface.

[0017] Furthermore, the one-way valve assembly also includes a one-way valve elastic member, and the one-way valve elastic member is used to apply a restoring force to the one-way valve core to drive the one-way valve core to move in a direction close to the first sealing surface.

[0018] Furthermore, the one-way valve assembly also includes a hydraulically controlled opening component, and the liquid hole opening component is used to drive the one-way valve core to move in a direction away from the first sealing surface to open the one-way valve assembly and allow the column to discharge liquid outward.

[0019] Further, the first valve cavity and the second valve cavity are both orifice cavities; the first valve channel is arranged on a side of the first valve cavity away from the second valve cavity, the second valve channel is arranged on a side of the first valve cavity close to the second valve cavity, the third valve channel is arranged between the first valve cavity and the second valve cavity and connects the first valve cavity and the second valve cavity, and the fourth valve channel is arranged near the end of the second valve cavity and connects the second valve channel.

[0020] Furthermore, the valve body is also provided with a plurality of connecting through holes for bolts to penetrate, the valve body is connected to the column via the bolts, and the connecting through holes are perpendicular to the plane where the second valve port is located.

[0021] The column valve provided by the present invention has the following technical effects:

[0022] (1) It realizes the recycling of liquid and avoids a series of disadvantages caused by the discharge of liquid into the ground.

[0023] (2) No external pipelines are added, thus avoiding the problem of complicated structure and bulky volume that makes installation difficult and affects the use of the bracket after installation.

[0024] (3) It can prevent the back pressure of the supply / return liquid components from acting on the safety valve core in the form of axial force, which is conducive to the precise opening and closing of the safety valve assembly.

[0025] (4) The easily damaged safety valve sealing ring can be quickly replaced. During the replacement process, there is no need to disassemble the safety valve elastic part, which saves the tedious steps of adjusting the elastic force of the safety valve elastic part.

[0026] (5) The overall structure is compact and small in size. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A cross-sectional view of a specific embodiment of the column valve provided by the present invention;

[0028] Figure 2 A cross-sectional view of the valve body

[0029] Figure 3 for Figure 1 Left view of

[0030] Figure 4 It is a schematic diagram of the safety valve assembly in a closed state;

[0031] Figure 5 It is a schematic diagram of the safety valve assembly in the open state.

[0032] The following are the descriptions of the reference numerals:

[0033] 10 valve body, 101 first valve port, 102 second valve port, 103 first valve cavity, 104 second valve cavity, 105 first valve channel, 106 second valve channel, 107 third valve channel, 108 fourth valve channel;

[0034] 20 one-way valve assembly, 21 one-way valve sleeve, 211 first through hole, 212 second through hole, 213 first sealing surface, 22 one-way valve core, 221 second sealing surface, 23 one-way valve elastic member, 24 hydraulic control opening member;

[0035] 30 safety valve assembly, 31 safety valve sleeve, 311 third through hole, 32 safety valve core, 321 counterbore, 322 fourth through hole, 323 equal diameter cylindrical section, 33 safety valve sealing ring, 34 safety pressing sleeve, 35 safety valve elastic member;

[0036] 40 plug. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] like Figure 1-Figure 3 As shown, the pillar valve includes a valve body 10 , a one-way valve assembly 20 and a safety valve assembly 30 .

[0039] 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 component, and the second valve port 102 is communicated with the lower cavity of the column.

[0040] The valve body 10 is further provided with a first valve chamber 103 and a second valve chamber 104 . The one-way valve assembly 20 is installed in the first valve chamber 103 , and the safety valve assembly 30 is installed in the second valve chamber 104 .

[0041] The valve body 10 is further provided with a first valve channel 105 and a second valve channel 106. The first valve channel 105 communicates with the first valve cavity 103 and the first valve port 101, and the second valve channel 106 communicates with the first valve cavity 103 and the second valve port 102. When the one-way valve assembly 20 is opened, the first valve channel 105 and the second valve channel 106 are communicated with each other, and when the one-way valve assembly 20 is closed, the first valve channel 105 and the second valve channel 106 are closed with each other.

[0042] The valve body 10 is further provided with a third valve passage 107 and a fourth valve passage 108. The third valve passage 107 communicates with the second valve cavity 104 and the first valve port 101, and the fourth valve passage 108 communicates with the second valve cavity 104 and the second valve port 102. When the safety valve assembly 30 is opened, the third valve passage 107 and the fourth valve passage 108 are communicated with each other, and when the safety valve assembly 30 is closed, the third valve passage 107 and the fourth valve passage 108 are closed with each other.

[0043] As set above, when the column is overloaded and the pressure in the lower cavity of the column needs to be relieved, the safety valve assembly 30 opens, and the liquid in the lower cavity of the column flows back to the liquid supply component through the fourth valve channel 108 and the third valve channel 107, and will not be discharged to the ground, thus realizing the recycling of the liquid and avoiding a series of disadvantages caused by the discharge of the liquid to the ground. Moreover, no external pipeline is added, thus avoiding the problems of complex structure, large volume, difficulty in installation and influence on the use of the bracket after installation due to the addition of external pipelines.

[0044] Specifically, Figure 1 As shown, the first valve cavity 103 and the second valve cavity 104 are both perforated cavities. The perforated cavity is a long strip cavity with a plurality of holes on the peripheral wall. The first valve channel 105 is arranged on the side of the first valve cavity 103 away from the second valve cavity 104, and the second valve channel 106 is arranged on the side of the first valve cavity 103 close to the second valve cavity 104. The third valve channel 107 is arranged between the first valve cavity 103 and the second valve cavity 104 and connects the first valve cavity 103 and the second valve cavity 104. The fourth valve channel 108 is arranged near one end of the second valve cavity 104 and connects with the second valve channel 106. This arrangement makes the column valve compact and small in size.

[0045] Specifically, Figure 1-Figure 3 As shown, the valve body 10 is also provided with a plurality of connecting through holes. When in use, the bolts are passed through the connecting through holes and then screwed to the columns. Figure 3As shown, the connecting through hole is perpendicular to the plane where the second valve port 102 is located, so that the plane where the second valve port 102 is located and the plane where the cavity opening of the column lower cavity is located can be in close contact under the tightening force of the bolt to prevent leakage at the contact position between the two. Figure 3 As shown, in a specific solution, a sealing member is also provided at the contact position between the two.

[0046] Specifically, Figure 1 As shown, the first valve cavity 103 is a perforated cavity, and the first valve channel 105 and the second valve channel 106 are both connected to the circumferential surface of the first valve cavity 103 .

[0047] like Figure 1 As shown, the one-way valve assembly 20 includes a one-way valve sleeve 21. The one-way valve sleeve 21 is sealed and installed in the first valve cavity 103. In detail, the outer peripheral surface of the one-way valve sleeve 21 is in sealing contact with the circumferential surface of the first valve cavity 103 through a sealing ring. The circumferential wall of the one-way valve sleeve 21 is provided with a first through hole 211 communicating with the first valve channel 105, a second through hole 212 communicating with the second valve channel 106, and a first sealing surface 213 located between the first through hole 211 and the second through hole 212.

[0048] like Figure 1 As shown, the one-way valve assembly 20 also includes a one-way valve core 22. The one-way valve core 22 is installed in the one-way valve sleeve 21 and can move along the axial direction of the one-way valve sleeve 21. The one-way valve core 22 is provided with a second sealing surface 221 at one end close to the first through hole 211. During the movement of the one-way valve core 22, the first sealing surface 213 and the second sealing surface 221 can be in sealing contact or separation. When the first sealing surface 213 is in sealing contact with the second sealing surface 221 (such as Figure 1 ), the one-way valve assembly 20 is closed, the first through hole 211 and the second through hole 212 are mutually sealed, and the first valve channel 105 and the second valve channel 106 are mutually sealed. When the first sealing surface 213 and the second sealing surface 221 are separated, the one-way valve assembly 20 is opened, the first through hole 211 and the second through hole 212 are mutually communicated, and the first valve channel 105 and the second valve channel 106 are mutually communicated.

[0049] like Figure 1 As shown, the one-way valve assembly 20 further includes a one-way valve elastic member 23 , which is used to apply elastic force to the one-way valve core 22 to drive the one-way valve core 22 to move toward the direction close to the first sealing surface 213 .

[0050] like Figure 1 As shown, the one-way valve assembly 20 further includes a hydraulically controlled opening component 24, which is used to drive the one-way valve core 22 to move away from the first sealing surface 213, so as to open the one-way valve assembly 20 with the help of external force.

[0051] The working principle of the one-way valve assembly 20 is:

[0052] When liquid is added to the lower cavity of the column, the axial force on one end of the one-way valve core 22 where the second sealing surface 221 is provided is greater than the axial force on the other end, and the one-way valve core 22 automatically moves away from the first sealing surface 213 under the action of the hydraulic pressure, thereby realizing the automatic opening of the one-way valve assembly 20;

[0053] When the column is loaded, the axial force on one end of the one-way valve core 22 provided with the second sealing surface 221 is smaller than the axial force on the other end. The one-way valve core 22 is in close contact with the first sealing surface 213 under the action of the hydraulic pressure and the one-way valve elastic member 23, thereby preventing the liquid in the lower cavity of the column from flowing back to the liquid supply component, thereby ensuring the stability of the load;

[0054] When the height of the bracket needs to be lowered, the one-way valve core 22 is driven by the hydraulically controlled force opening component 24, so that the one-way valve core 22 overcomes the elastic force of the one-way valve elastic member 23 and the pressure of the lower cavity of the column and moves in a direction away from the first sealing surface 213, and the one-way valve assembly 20 is opened. At this time, the liquid in the lower cavity of the column flows back to the liquid supply component through the second valve channel 106 and the first valve channel 105, so as to reduce the liquid in the lower cavity of the column. It should be noted that the reduction of the liquid in the lower cavity of the column is carried out during the non-load-bearing process of the column, which does not affect the load-bearing of the column.

[0055] Specifically, Figure 1 As shown, the second valve cavity 104 is also a perforated cavity, the third valve channel 107 is communicated with the circumferential surface of the second valve cavity 104 , and the fourth valve channel 108 is communicated with one end of the second valve cavity 104 .

[0056] like Figure 1 As shown, the safety valve assembly 30 includes a safety valve sleeve 31, which is sealed and installed in the second valve cavity 104. In detail, the outer peripheral surface of the safety valve sleeve 31 is in sealing contact with the circumferential surface of the second valve cavity 104 through a sealing ring. A third through hole 311 communicating with the third valve channel 107 is provided on the peripheral wall of the safety valve sleeve 31.

[0057] like Figure 1 As shown, the safety valve assembly 30 also includes a safety valve core 32. The safety valve core 32 is sealingly installed in the safety valve sleeve 31. In detail, the outer circumference of the safety valve core 32 is in sealing contact with the inner circumference of the safety valve sleeve 31 via a sealing ring. A countersunk hole 321 is provided on the end surface of the safety valve core 32 close to the fourth valve channel 108, and a fourth through hole 322 is provided on the peripheral wall of the countersunk hole 321. The fourth through hole 322 is connected to the fourth valve channel 108 through the countersunk hole 321. The safety valve core 32 can move along the axial direction of the safety valve sleeve 31. During the movement of the safety valve core 32, the third through hole 311 and the fourth through hole 322 can overlap or stagger. Figure 4As shown, when the third through hole 311 and the fourth through hole 322 are staggered, the safety valve assembly 30 is closed, and the third valve channel 107 and the fourth valve channel 108 are sealed with each other. Figure 5 As shown, when the third through hole 311 overlaps with the fourth through hole 322 , the safety valve assembly 30 is opened, and the third valve channel 107 and the fourth valve channel 108 are connected to each other.

[0058] like Figure 1 As shown, the safety valve assembly 30 further includes a safety valve elastic member 35, which is installed at one end of the safety valve sleeve 31 away from the fourth valve passage 108 and is used to apply elastic force to the safety valve core 32 to drive the safety valve core 32 to move toward the fourth valve passage 108. In addition to the elastic force, the safety valve core 32 is also subjected to the hydraulic pressure from the lower cavity of the column. When the elastic force on the safety valve core 32 is balanced with the hydraulic pressure, the safety valve core 32 does not move.

[0059] The working principle of the safety valve assembly 30 is:

[0060] When the load on the column increases and the pressure in the lower cavity of the column increases, the hydraulic pressure on the safety valve core 32 is greater than the elastic force, so that the safety valve core 32 moves away from the fourth valve channel 108. At this time, the third through hole 311 and the fourth through hole 322 gradually overlap and connect. After the connection, the liquid in the lower cavity of the column flows back to the liquid supply component through the fourth valve channel 108 and the third valve channel 107, so that the pressure in the lower cavity of the column is reduced, thereby preventing the column from being damaged by overload.

[0061] When the pressure in the lower cavity of the column decreases to a level less than or equal to the elastic force on the safety valve core 32, the safety valve core 32 moves toward the fourth valve path 108, so that the third through hole 311 and the fourth through hole 322 are gradually staggered and closed. At this time, the liquid in the lower cavity of the column is sealed.

[0062] Preferably, Figure 1 As shown, the safety valve core 32 has a cylindrical section 323, and the outer diameters of the cross sections of the cylindrical section 323 are the same, that is, the cylindrical section 323 is an equal-diameter cylindrical section. The third through hole 311 is always located between the two end surfaces of the cylindrical section 323, that is, when the safety valve core 32 moves within a preset range, the third through hole 311 is located between the two end surfaces of the cylindrical section 323. In this way, the back pressure of the liquid supply component can be prevented from acting on the safety valve core 32 in the form of axial force, which is conducive to the accurate opening and closing of the safety valve assembly 30.

[0063] Preferably, Figure 1As shown, the end of the safety valve sleeve 31 close to the fourth valve channel 108 is equipped with a safety valve sealing ring 33 and a safety sleeve 34 for pressing the safety valve sealing ring 33. The safety sleeve 34 is threadedly connected to the safety valve sleeve 31. The safety valve sealing ring 33 is a wearing part and needs to be replaced frequently. In addition, a plug 40 is installed on the valve body 10. In detail, the valve body 10 is provided with a threaded connection hole. One end of the threaded connection hole is connected to the surface of the valve body 10, and the other end is opposite to the safety sleeve 34. The plug 40 is screwed into the threaded connection hole. In this way, when the plug 40 is removed, the safety sleeve 34 is exposed through the threaded connection hole, so that the safety sleeve 34 can be easily removed and the safety valve sealing ring 33 can be replaced. During the replacement process, the safety valve elastic member 35 does not need to be disassembled, which saves the cumbersome steps of adjusting the elastic force of the safety valve elastic member 35.

[0064] The above is a detailed introduction to a column valve for a coal mine hydraulic support provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. The column valve for coal mine hydraulic support is characterized by: include: A valve body (10), the valve body (10) being provided with a first valve port (101) for communicating with a liquid supply / return component, a second valve port (102) for communicating with a lower cavity of a column, a first valve cavity (103), a second valve cavity (104), a first valve passage (105) communicating with the first valve cavity (103) and the first valve port (101), a second valve passage (106) communicating with the first valve cavity (103) and the second valve port (102), a third valve passage (107) communicating with the second valve cavity (104) and the first valve port (101), and a fourth valve passage (108) communicating with the second valve cavity (104) and the second valve port (102); the third valve passage (107) being provided between the first valve cavity (103) and the second valve cavity (104) and communicating with the first valve cavity (103) and the second valve cavity (104), A one-way valve assembly (20), wherein the one-way valve assembly is mounted in the first valve cavity (103); when the one-way valve assembly (20) is opened, the first valve channel (105) and the second valve channel (106) are connected to each other; when the one-way valve assembly (20) is closed, the first valve channel (105) and the second valve channel (106) are closed to each other; the one-way valve assembly (20) comprises a one-way valve sleeve (21) sealed in the first valve cavity (103) and a one-way valve core (22) sealed in the one-way valve sleeve (21); the one-way valve sleeve (21) is provided with a first sealing surface (213); the one-way valve core (22) is provided with a second sealing surface (221) sealingly matched with the first sealing surface (213); the communication position between the third valve channel (107) and the first valve cavity (103) is located on a side of the first sealing surface (213) away from the second sealing surface (221); A safety valve assembly (30), wherein the safety valve assembly (30) is installed in the second valve chamber (104); when the safety valve assembly (30) is opened, the third valve channel (107) and the fourth valve channel (108) are connected to each other; when the safety valve assembly (30) is closed, the third valve channel (107) and the fourth valve channel (108) are closed to each other.

2. The column valve according to claim 1, characterized in that: The second valve cavity (104) is a perforated cavity, the third valve channel (107) is in communication with the circumferential surface of the second valve cavity (104), and the fourth valve channel (108) is in communication with one end of the second valve cavity (104); The safety valve assembly (30) comprises a safety valve sleeve (31) sealedly mounted in the second valve chamber (104) and a safety valve core (32) mounted on the safety valve sleeve (31); a third through hole (311) communicating with the third valve channel (107) is provided on a peripheral wall of the safety valve sleeve (31); a countersunk hole (321) is provided on an end surface of the safety valve core (32) close to the fourth valve channel (108); a fourth through hole (322) communicating with the fourth valve channel (108) is provided on a peripheral wall of the countersunk hole (321); the safety valve core (32) is capable of moving along the axial direction of the safety valve sleeve (31); during the movement, the third through hole (311) and the fourth through hole (322) are connected or closed.

3. The column valve according to claim 2, characterized in that: The safety valve core (32) has an equal-diameter cylindrical section (323), and the third through hole (311) is always located between the two end surfaces of the equal-diameter cylindrical section (323).

4. The column valve according to claim 2, characterized in that: A safety valve elastic member (35) is mounted on one end of the safety valve sleeve (31) away from the fourth valve channel (108), and the safety valve elastic member (35) is used to apply elastic force to the safety valve core (32) to drive the safety valve core (32) to move in a direction close to the fourth valve channel (108).

5. The column valve according to any one of claims 4, characterized in that: A safety valve sealing ring (33) and a safety sleeve (34) for compressing the safety valve sealing ring (33) are installed at one end of the safety valve sleeve (31) close to the fourth valve channel (108), and the safety sleeve (34) is threadedly connected to the safety valve sleeve (31); the valve body (10) is provided with a threaded connection hole for connecting a plug (40), one end of the threaded connection hole is connected to the surface of the valve body (10), and the other end is opposite to the safety sleeve (34), so that when the plug (40) is removed, the safety sleeve (34) is exposed through the threaded connection hole.

6. The column valve according to any one of claims 1 to 5, characterized in that: The first valve cavity (103) is a perforated cavity, and the first valve channel (105) and the second valve channel (106) are both connected to the circumferential surface of the first valve cavity (103); A first through hole (211) communicating with the first valve channel (105), a second through hole (212) communicating with the second valve channel (106) are provided on the peripheral wall of the one-way valve sleeve (21), and the first sealing surface (213) is located between the first through hole (211) and the second through hole (212).

7. The column valve according to claim 6, characterized in that: The one-way valve assembly (20) further comprises a one-way valve elastic member (23), wherein the one-way valve elastic member (23) is used to apply a restoring force to the one-way valve core (22) so as to drive the one-way valve core (22) to move in a direction close to the first sealing surface (213).

8. The column valve according to claim 6, characterized in that: The one-way valve assembly (20) further comprises a hydraulically controlled opening component (24), wherein the hydraulically controlled opening component (24) is used to drive the one-way valve core (22) to move in a direction away from the first sealing surface (213), so as to open the one-way valve assembly (20) and allow the column to discharge liquid outward.

9. The column valve according to any one of claims 1 to 5, characterized in that: The first valve chamber (103) and the second valve chamber (104) are both orifice chambers; the first valve channel (105) is arranged on a side of the first valve chamber (103) away from the second valve chamber (104), the second valve channel (106) is arranged on a side of the first valve chamber (103) close to the second valve chamber (104), and the fourth valve channel (108) is arranged near the end of the second valve chamber (104) and is connected to the second valve channel (106).

10. The column valve according to any one of claims 1 to 5, characterized in that: The valve body (10) is also provided with a plurality of connecting through holes for bolts to penetrate, the valve body (10) is connected to the columns via the bolts, and the connecting through holes are perpendicular to the plane where the second valve port (102) is located.

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