Leakage-proof wellhead gate valve for oil exploitation

Abstract

The invention relates to the technical field of electromagnetic valves, and discloses a leakproof wellhead gate valve for oil exploitation. The valve assembly heat dissipation rod is arranged in the sleeve and comprises an outer shell heat dissipation rod arranged in the sleeve, a magnetic armature heat dissipation rod arranged in the sleeve, a coil heat dissipation rod arranged in the sleeve, a plunger heat dissipation rod arranged in the sleeve, a valve spring heat dissipation rod arranged in the sleeve, a valve element heat dissipation rod arranged in the sleeve and a sealing piece heat dissipation rod arranged in the sleeve. According to the anti-leakage wellhead gate valve for oil exploitation, heat dissipation can be conducted when a magnetic armature and a coil in the outer shell do work mutually, leakage is prevented, an auxiliary part is further arranged on the outer shell and comprises a sleeve arranged on a sealing part, the sealing part is further connected with the outer shell through the sleeve, and the sealing part is connected with the outer shell through the sleeve. A heat dissipation rod is further arranged in the sleeve and used for heat dissipation.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic valves, in particular to a leakage-proof wellhead gate valve used for oil exploitation. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic automation components used to control fluids. They are actuators, electric or electromagnetically operated switch valves. They are widely used in the automotive industry and are used in different ways and have different functions in the air suspension system of automobiles.

[0003] Knife gate solenoid valve is a device that combines the functions of knife gate valve and solenoid valve, usually used for fluid control. It opens or closes the valve by driving the electromagnetic coil, plays the role of quickly cutting off the fluid, and is widely used in the control of liquid, gas and other media in industrial pipelines.

[0004] For example, a leak-proof wellhead gate valve for oil extraction with Chinese patent publication number CN217815065U improves the sealing effect between the knife gate plate and the valve housing when the knife gate plate closes the through hole by installing two sealing rings at the through hole of the valve housing, effectively solving the problem that the existing knife gate type solenoid valve is only sealed by the abutment between the knife gate plate and the valve housing, and there is leakage. By installing an arc groove and a stopper in the valve housing, when the knife gate plate opens the through hole, the stopper can slide out of the arc groove to block the two sealing rings at the through hole, thereby ensuring the stability of the sealing ring installed at the through hole. Due to the arrangement of the abutting grooves and abutting plates on the front and rear sides of the knife gate plate, when the knife gate plate closes the through hole, the abutting plate can slide out of the abutting groove to squeeze the two sealing rings at the through hole. On the one hand, the stability of the sealing ring installed at the through hole is improved, and on the other hand, the sealing effect of the two sealing rings between the knife gate plate and the valve housing is further improved by increasing the extrusion force.

[0005] Since the solenoid valve is provided with a magnetic armature and a coil, the temperature of the solenoid valve will gradually rise after power is turned on. Although the higher the voltage, the higher the sensitivity of the solenoid valve will be, the temperature of the solenoid valve will rise rapidly. The high temperature will cause the electromagnetic induction to lose a certain degree of stability, which may easily cause leakage. Some solenoid valves equipped with heat dissipation equipment will cause incomplete closure of the inside and outside of the solenoid valve to a certain extent, resulting in leakage of the sealing valve, which will affect its normal sealing effect. Therefore, it does not meet the existing needs. In this regard, we propose a leakage-proof wellhead gate valve for oil extraction. Summary of the invention

[0006] The present invention provides a leak-proof wellhead gate valve for oil extraction, which has the beneficial effect of strengthening the sealing performance of the solenoid valve itself while providing additional heat dissipation, and solves the problem mentioned in the above background technology that after power is turned on, the temperature of the solenoid valve will gradually rise, and although the higher the voltage of the power supply will increase the sensitivity of the solenoid valve, it will cause the temperature of the solenoid valve to rise rapidly, and the high temperature will cause the electromagnetic induction to lose a certain degree of stability, which is easy to cause leakage, and some solenoid valves equipped with heat dissipation equipment will cause incomplete closure of the inside and outside of the solenoid valve to a certain extent, causing leakage of the sealing valve, thereby affecting its normal sealing effect.

[0007] The present invention provides the following technical solutions: a leak-proof wellhead gate valve for oil extraction, comprising a valve assembly, wherein the valve assembly comprises an outer shell, a magnetic armature, a coil, a plunger, a valve spring, a valve core and a sealing member;

[0008] The outer shell is also provided with an auxiliary part, which is used for heat dissipation after the seal and the outer shell are matched;

[0009] The auxiliary component comprises a sleeve arranged in the outer shell, a heat dissipation rod is slidably arranged in the sleeve, and the diameter of the heat dissipation rod gradually increases from one side to the other side.

[0010] Preferably, a sealing plate is provided in the sleeve, and the sealing plate is used to seal the heat dissipation rod;

[0011] The sealing plate comprises a second sealing plate slidably arranged in the sleeve, the second sealing plate abuts against the heat dissipation rod, and the heat dissipation rod is provided with the first sealing plate.

[0012] Preferably, an adjustment mechanism is further provided in the sleeve, and the heat dissipation rod is slidably arranged in the sleeve through the adjustment mechanism;

[0013] The adjustment mechanism comprises a push plate slidably arranged in the sleeve, a return spring is arranged on the push plate, the push plate is connected to the sleeve through the return spring, and the heat dissipation rod is arranged on the push plate.

[0014] Preferably, a sliding mechanism is further provided in the sleeve, the sliding mechanism comprises a sliding groove provided on the sleeve, a sliding block is provided on the push plate, and the sliding block is slidably provided in the sliding groove;

[0015] A limiting rod is arranged in the slide groove, and the sliding block is slidably arranged on the limiting rod.

[0016] Preferably, a moving mechanism is further provided in the sleeve, and the push plate slides in the sleeve through the moving mechanism;

[0017] The moving mechanism comprises a moving block slidably arranged in a sleeve, a connecting rod is arranged on the moving block, the moving block is connected to a sealing member via the connecting rod, and the moving block abuts against the push plate.

[0018] Preferably, a guide rod is further provided in the sleeve, and the moving block is slidably provided on the guide rod.

[0019] Preferably, an adjustment mechanism is also provided in the sleeve, and the second sealing plate is slidably arranged in the sleeve through the adjustment mechanism. The adjustment mechanism includes an adjustment plate slidably arranged in the sleeve, a support spring is arranged on the adjustment plate, and the adjustment plate is connected to the sleeve through the support spring.

[0020] Preferably, two second sealing plates are provided on the adjustment plate, and each second sealing plate is connected to the adjustment plate through an adaptive mechanism;

[0021] The adaptive mechanism comprises a groove formed in the second sealing plate, a connecting spring is arranged in the groove, and the second sealing plate is connected to the adjusting plate via the connecting spring.

[0022] Preferably, a telescopic rod is further provided in the groove, the second sealing plate is further connected to the adjustment plate via the telescopic rod, and the connecting spring sleeve is arranged on the outside of the telescopic rod.

[0023] Preferably, a connecting block is further provided between the second sealing plates, and the two second sealing plates are both slidably provided on the connecting block.

[0024] The present invention has the following beneficial effects:

[0025] 1. The leak-proof wellhead gate valve used for oil extraction is provided with auxiliary parts on the outer shell in order to allow the magnetic armature and the coil in the outer shell to dissipate heat when they work with each other and prevent leakage. The auxiliary parts include a sleeve provided on the seal, and the seal is connected to the outer shell through the sleeve. A heat dissipation rod is provided in the sleeve for dissipating heat. When the seal is inserted into the outer shell, the heat dissipation rod in the sleeve will be pushed out to assist in heat dissipation. At the same time, since the heat dissipation rod is provided in the sleeve, the sleeve can effectively cut off the connection between the valve assembly and the outside world, thereby preventing the valve assembly from leaking due to the addition of the heat dissipation rod.

[0026] 2. The leakage-proof wellhead gate valve used for oil extraction has two second sealing plates vertically arranged in the same direction to form a group in order to adapt to the diameter change of the heat dissipation rod. A sealing assembly consisting of several second sealing plates is arranged in the sleeve. An adjusting mechanism is also arranged in the sleeve. The second sealing plates are slidably arranged on the adjusting mechanism. Through the adjusting mechanism, each group of second sealing plates can be in contact with the surface of the heat dissipation rod and can flexibly adapt to the diameter change of the heat dissipation rod. At the same time, each group of sealing assemblies is composed of two second sealing plates, so that even if the diameters of the heat dissipation rods are different, the two second sealing plates can perform different degrees of contact and sealing on the heat dissipation rods in the same vertical direction, thereby reducing the possibility of leakage.

[0027] 3. In order to prevent the failure of the device caused by the diffusion of multiple second sealing plates, the leakage-proof wellhead gate valve used for oil extraction is also provided with a connecting block between the second sealing plates. Each second sealing plate is slidably set on the connecting block, so that after the second sealing plates diffuse, the connecting block can maintain the sealing relationship formed between the second sealing plates, thereby avoiding the sealing failure caused by the diffusion and improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a side view of the overall structure of the present invention.

[0030] Figure 3 for Figure 2 Cross-sectional view at AA in the middle.

[0031] Figure 4 It is a structural schematic diagram of the auxiliary parts in the present invention.

[0032] Figure 5 It is a top view of the auxiliary part in the present invention.

[0033] Figure 6 for Figure 5 Cross-sectional view at the middle BB.

[0034] Figure 7 It is a structural schematic diagram of the second sealing plate and the adjustment mechanism in the present invention.

[0035] Figure 8 It is a cross-sectional view of the second sealing plate and the adjustment mechanism in the present invention.

[0036] In the figure: 1. valve assembly; 11. outer shell; 12. magnetic armature; 13. coil; 14. plunger; 15. valve spring; 16. valve core; 17. seal; 2. auxiliary part; 21. sleeve; 22. heat dissipation rod; 3. sealing plate; 31. first sealing plate; 32. second sealing plate; 4. adjustment mechanism; 41. push plate; 42. reset spring; 5. moving mechanism; 51. moving block; 52. connecting rod; 6. guide rod; 7. sliding mechanism; 71. slide groove; 72. slider; 73. limit rod; 8. adjustment mechanism; 81. adjustment plate; 83. support spring; 9. connecting block; 10. adaptive mechanism; 101. groove; 102. telescopic rod; 103. connecting spring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] Since the solenoid valve is equipped with a magnetic armature and a coil, the temperature of the solenoid valve will gradually rise after power is turned on. Although the higher the voltage, the higher the sensitivity of the solenoid valve, the faster the temperature of the solenoid valve will rise. The high temperature will cause the electromagnetic induction to lose a certain degree of stability, which will easily cause leakage. Some solenoid valves equipped with heat dissipation equipment will cause incomplete closure inside and outside of the solenoid valve to a certain extent, causing leakage in the sealing valve, thus affecting its normal sealing effect. Therefore, it does not meet the existing needs. In this regard, we propose a leak-proof wellhead gate valve for oil extraction. Please refer to Figure 1-Figure 4 , a leak-proof wellhead gate valve for oil extraction, comprising a valve assembly 1, the valve assembly 1 comprising an outer shell 11, a magnetic armature 12, a coil 13, a plunger 14, a valve spring 15, a valve core 16 and a sealing member 17;

[0040] The outer shell 11 is also provided with an auxiliary member 2, which is used to dissipate heat after the seal 17 and the outer shell 11 are matched;

[0041] The auxiliary component 2 includes a sleeve 21 disposed in the outer shell 11 , a heat dissipation rod 22 is slidably disposed in the sleeve 21 , and the diameter of the heat dissipation rod 22 gradually increases from one side to the other side.

[0042] In this embodiment: In order to allow the magnetic armature 12 and the coil 13 in the outer shell 11 to dissipate heat when working with each other and prevent leakage, an auxiliary part 2 is also provided on the outer shell 11. The auxiliary part 2 includes a sleeve 21 also provided on the seal 17. The seal 17 is also connected to the outer shell 11 through the sleeve 21. A heat dissipation rod 22 is also provided in the sleeve 21. The heat dissipation rod 22 is used for heat dissipation. When the seal 17 is inserted into the outer shell 11, the heat dissipation rod 22 in the sleeve 21 will be pushed out, thereby assisting in heat dissipation. At the same time, since the heat dissipation rod 22 is provided in the sleeve 21, the sleeve 21 can effectively isolate the valve assembly 1 from the outside world, thereby preventing the valve assembly 1 from leaking due to the addition of the heat dissipation rod 22.

[0043] At the same time, the diameter of the heat dissipation rod 22 gradually increases from one side to the other side, so that the heat dissipation rod 22 can be easily extended from the sleeve 21, and the heat dissipation rod 22 can be adjusted to different levels according to the actual sealing degree, thereby increasing the applicability of the device.

[0044] Example 2

[0045] See also Figure 4-Figure 6 A sealing plate 3 is provided in the sleeve 21, and the sealing plate 3 is used to seal the heat dissipation rod 22;

[0046] The sealing plate 3 includes a second sealing plate 32 slidably disposed in the sleeve 21 . The second sealing plate 32 abuts against the heat dissipation rod 22 , and the first sealing plate 31 is disposed on the heat dissipation rod 22 .

[0047] In this embodiment: In order to further improve the sealing effect of the sleeve 21 and prevent liquid from flowing into the sleeve 21 due to the gap caused by the sliding of the heat dissipation rod 22 in the sleeve 21, a sealing plate 3 is arranged in the sleeve 21, and the sealing plate 3 is divided into a first sealing plate 31 and a second sealing plate 32, wherein the first sealing plate 31 is arranged at the top of the heat dissipation rod 22, thereby sealing the gap between the heat dissipation rod 22 and the sleeve 21, and a second sealing plate 32 is also arranged in the sleeve 21. Since the diameter of the heat dissipation rod 22 decreases from one side to the other side, the heat dissipation rod 22 is secondary sealed by the second sealing plate 32, thereby further blocking the connection between the sleeve 21 and the outside world, while completing the concentration of heat dissipation on the heat dissipation rod 22, the sealing effect of the sleeve 21 is improved.

[0048] Example 3

[0049] See also Figure 6 , an adjustment mechanism 4 is also provided in the sleeve 21, and the heat dissipation rod 22 is slidably provided in the sleeve 21 through the adjustment mechanism 4;

[0050] The adjustment mechanism 4 includes a push plate 41 slidably disposed in the sleeve 21 . A return spring 42 is disposed on the push plate 41 . The push plate 41 is connected to the sleeve 21 via the return spring 42 . The heat dissipation rod 22 is disposed on the push plate 41 .

[0051] In this embodiment: at the same time, in order to allow the heat dissipation rod 22 to protrude from the sleeve 21, and when the seal 17 is separated from the valve assembly 1, the heat dissipation rod 22 can be retracted into the sleeve 21 to prevent it from getting stuck;

[0052] An adjustment mechanism 4 is also provided in the sleeve 21, and the adjustment mechanism 4 includes a push plate 41 slidably provided in the sleeve 21, and the heat dissipation rod 22 is provided on the push plate 41; at the same time, a return spring 42 is provided on the push plate 41, and the push plate 41 is connected to the sleeve 21 through the return spring 42;

[0053] By squeezing the push plate 41 to make it close to the outer wall of the sleeve 21, the heat dissipation rod 22 installed on the push plate 41 can be extended from the sleeve 21 to dissipate heat;

[0054] When the seal 17 slides out of the outer shell 11, the return spring 42 releases its stored elastic potential energy, thereby pushing the push plate 41 to slide in the opposite direction, moving it away from the inner wall of the sleeve 21, and then allowing the heat dissipation rod 22 to retract into the sleeve 21, thereby facilitating the separation of the seal 17 from the outer shell 11 to avoid jamming.

[0055] Example 4

[0056] See also Figure 6 The sleeve 21 is also provided with a sliding mechanism 7, the sliding mechanism 7 includes a slide groove 71 provided on the sleeve 21, a slider 72 is provided on the push plate 41, and the slider 72 is slidably provided in the slide groove 71;

[0057] A limiting rod 73 is disposed in the slide groove 71 , and the slider 72 is slidably disposed on the limiting rod 73 .

[0058] A moving mechanism 5 is also provided in the sleeve 21, and the push plate 41 slides in the sleeve 21 through the moving mechanism 5;

[0059] The moving mechanism 5 includes a moving block 51 slidably disposed in the sleeve 21 . A connecting rod 52 is disposed on the moving block 51 . The moving block 51 is connected to the sealing member 17 via the connecting rod 52 . The moving block 51 abuts against the push plate 41 .

[0060] A guide rod 6 is further disposed in the sleeve 21 , and the moving block 51 is slidably disposed on the guide rod 6 .

[0061] In this embodiment: In order to facilitate the sliding of the push plate 41, a sliding mechanism 7 is also provided in the sleeve 21, and the push plate 41 is slidably connected to the sleeve 21 through the sliding mechanism 7;

[0062] The sliding mechanism 7 includes a slide groove 71 provided on the sleeve 21, and a slider 72 is provided on the push plate 41. The slider 72 is adapted to the slide groove 71 and is slidably provided in the slide groove 71. Through the cooperation between the slide groove 71 and the slider 72, the push plate 41 can slide in the sleeve 21.

[0063] At the same time, a limit rod 73 is also provided in the slide groove 71, and the slider 72 is slidably provided on the limit rod 73. The limit rod 73 limits the sliding of the slider 72 in the slide groove 71, so that the sliding is more stable.

[0064] In order to enable the push plate 41 to slide in the direction close to the sleeve 21 when the seal 17 is inserted into the outer shell 11, a moving mechanism 5 is further provided in the sleeve 21. The moving mechanism 5 includes a moving block 51 slidably provided in the sleeve 21, and a connecting rod 52 is provided on the moving block 51. The moving block 51 is connected to the seal 17 through the connecting rod 52. Through the cooperation of the moving block 51 and the connecting rod 52, the seal 17 can gradually push the push plate 41 against the inner wall of the sleeve 21 when being inserted into the outer shell 11.

[0065] At the same time, in order to make the sliding of the moving block 51 in the sleeve 21 more stably, a guide rod 6 is also provided in the sleeve 21, and the moving block 51 is also slidably provided on the guide rod 6. By providing the guide rod 6, the sliding of the moving block 51 in the sleeve 21 is subject to additional limitation, thereby making its sliding more stable.

[0066] Example 5

[0067] See also Figure 7-Figure 8 An adjusting mechanism 8 is also provided in the sleeve 21, and the second sealing plate 32 is slidably set in the sleeve 21 through the adjusting mechanism 8. The adjusting mechanism 8 includes an adjusting plate 81 slidably set in the sleeve 21, and a supporting spring 83 is provided on the adjusting plate 81. The adjusting plate 81 is connected to the sleeve 21 through the supporting spring 83.

[0068] Two second sealing plates 32 are provided on the adjustment plate 81, and each second sealing plate 32 is connected to the adjustment plate 81 through an adaptive mechanism 10;

[0069] The adaptive mechanism 10 includes a groove 101 formed in the second sealing plate 32 . A connecting spring 103 is disposed in the groove 101 . The second sealing plate 32 is connected to the adjusting plate 81 via the connecting spring 103 .

[0070] A telescopic rod 102 is further disposed in the groove 101 , and the second sealing plate 32 is also connected to the adjustment plate 81 via the telescopic rod 102 . The connecting spring 103 is sleeved on the outside of the telescopic rod 102 .

[0071] A connecting block 9 is further disposed between the second sealing plates 32 , and the two second sealing plates 32 are both slidably disposed on the connecting block 9 .

[0072] In this embodiment: in order to adapt to the diameter change of the heat dissipation rod 22, two second sealing plates 32 are vertically arranged in the same direction and form a group, a sealing assembly consisting of a plurality of second sealing plates 32 is arranged in the sleeve 21, and an adjustment mechanism 8 is also arranged in the sleeve 21, and the second sealing plate 32 is slidably arranged on the adjustment mechanism 8;

[0073] The adjustment mechanism 8 includes an adjustment plate 81 slidably disposed on the sleeve 21 . A support spring 83 is disposed on the adjustment plate 81 . The adjustment plate 81 is connected to the sleeve 21 via the support spring 83 . The second sealing plate 32 is disposed on the adjustment plate 81 .

[0074] Through the adjustment mechanism 8, each group of second sealing plates 32 can be in contact with the surface of the heat dissipation rod 22 and can flexibly adapt to the diameter change of the heat dissipation rod 22. At the same time, each group of sealing components is composed of two second sealing plates 32, so that even if the diameters of the heat dissipation rods 22 are different, the heat dissipation rods 22 in the same vertical direction can be sealed to different degrees by the two second sealing plates 32, thereby reducing the possibility of leakage.

[0075] At the same time, each second sealing plate 32 is provided with an adaptive mechanism 10, and each second sealing plate 32 is slidably connected with the adjustment plate 81 through the adaptive mechanism 10;

[0076] The adaptive mechanism 10 includes a groove 101 formed on the second sealing plate 32. A connecting spring 103 is disposed in the groove 101. The second sealing plate 32 is elastically connected to the adjusting plate 81 via the connecting spring 103.

[0077] By providing the groove 101 and the connecting spring 103, each second sealing plate 32 is independently connected to the adjusting plate 81, so as to better adapt to the shape change of the heat dissipation rod 22 and prevent it from getting stuck;

[0078] At the same time, in order to prevent the connecting spring 103 from bending during elastic deformation, thereby causing the second sealing plate 32 to be unable to tightly contact the heat dissipation rod 22, a telescopic rod 102 is also arranged in the groove 101, and the groove 101 is also connected to the adjustment plate 81 through the telescopic rod 102. At the same time, the connecting spring 103 is sleeved on the outside of the telescopic rod 102, and the telescopic rod 102 is used to limit the connecting spring 103 during elastic deformation, thereby preventing it from bending and causing the sliding of the second sealing plate 32 to be obstructed.

[0079] At the same time, in order to adapt to the outer diameter of the heat dissipation rod 22, the second sealing plates 32 need to be distributed in a circular array in the sleeve 21. When the outer diameter of the heat dissipation rod 22 changes, the multiple second sealing plates 32 are bound to diffuse. Therefore, in order to prevent the multiple second sealing plates 32 from causing device failure after diffusion, a connecting block 9 is further arranged between the second sealing plates 32 and the second sealing plates 32. Each second sealing plate 32 is slidably arranged on the connecting block 9, so that after the second sealing plates 32 diffuse, the connecting block 9 can maintain the sealing relationship formed between the second sealing plates 32, thereby avoiding sealing failure caused by diffusion and improving the applicability of the device.

[0080] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0081] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A leak-proof wellhead gate valve for oil production, characterized in that: The valve assembly (1) comprises an outer shell (11), a magnetic armature (12), a coil (13), a plunger (14), a valve spring (15), a valve core (16) and a sealing member (17); The outer shell (11) is also provided with an auxiliary component (2), and the auxiliary component (2) is used to dissipate heat after the sealing component (17) and the outer shell (11) are matched; The auxiliary component (2) comprises a sleeve (21) arranged in the outer shell (11), a heat dissipation rod (22) is slidably arranged in the sleeve (21), and the diameter of the heat dissipation rod (22) gradually increases from one side to the other side.

2. The anti-leakage wellhead gate valve for oil production according to claim 1 is characterized in that: A sealing plate (3) is arranged inside the sleeve (21), and the sealing plate (3) is used to seal the heat dissipation rod (22); The sealing plate (3) comprises a second sealing plate (32) slidably arranged in the sleeve (21), the second sealing plate (32) abutting against a heat dissipation rod (22), and the heat dissipation rod (22) is provided with a first sealing plate (31).

3. The anti-leakage wellhead gate valve for oil production according to claim 2 is characterized in that: An adjustment mechanism (4) is also provided in the sleeve (21), and the heat dissipation rod (22) is slidably arranged in the sleeve (21) via the adjustment mechanism (4); The adjustment mechanism (4) comprises a push plate (41) slidably arranged in the sleeve (21), a return spring (42) being arranged on the push plate (41), the push plate (41) being connected to the sleeve (21) via the return spring (42), and the heat dissipation rod (22) being arranged on the push plate (41).

4. The anti-leakage wellhead gate valve for oil production according to claim 3 is characterized in that: A sliding mechanism (7) is also arranged in the sleeve (21), and the sliding mechanism (7) comprises a sliding groove (71) provided on the sleeve (21); a sliding block (72) is arranged on the push plate (41), and the sliding block (72) is slidably arranged in the sliding groove (71); A limiting rod (73) is arranged in the sliding groove (71), and the sliding block (72) is slidably arranged on the limiting rod (73).

5. The anti-leakage wellhead gate valve for oil production according to claim 4, characterized in that: A moving mechanism (5) is also provided in the sleeve (21), and the push plate (41) slides in the sleeve (21) through the moving mechanism (5); The moving mechanism (5) comprises a moving block (51) slidably arranged in the sleeve (21), a connecting rod (52) being arranged on the moving block (51), the moving block (51) being connected to the sealing member (17) via the connecting rod (52), and the moving block (51) abutting against the push plate (41).

6. The anti-leakage wellhead gate valve for oil production according to claim 5, characterized in that: A guide rod (6) is also arranged inside the sleeve (21), and the moving block (51) is slidably arranged on the guide rod (6).

7. The anti-leakage wellhead gate valve for oil production according to claim 6, characterized in that: An adjusting mechanism (8) is also provided in the sleeve (21), and the second sealing plate (32) is slidably arranged in the sleeve (21) via the adjusting mechanism (8). The adjusting mechanism (8) comprises an adjusting plate (81) slidably arranged in the sleeve (21), and a supporting spring (83) is provided on the adjusting plate (81), and the adjusting plate (81) is connected to the sleeve (21) via the supporting spring (83).

8. The anti-leakage wellhead gate valve for oil production according to claim 7, characterized in that: Two second sealing plates (32) are arranged on the adjustment plate (81), and each second sealing plate (32) is connected to the adjustment plate (81) via an adaptive mechanism (10); The adaptive mechanism (10) comprises a groove (101) formed in the second sealing plate (32), a connecting spring (103) being arranged in the groove (101), and the second sealing plate (32) is connected to the adjusting plate (81) via the connecting spring (103).

9. The anti-leakage wellhead gate valve for oil production according to claim 8, characterized in that: A telescopic rod (102) is also provided in the groove (101), and the second sealing plate (32) is also connected to the adjustment plate (81) via the telescopic rod (102), and the connecting spring (103) is sleeved on the outside of the telescopic rod (102).

10. The anti-leakage wellhead gate valve for oil production according to claim 9, characterized in that At: A connecting block (9) is also provided between the second sealing plates (32). The two second sealing plates (32) are both slidably arranged on the connecting block (9).

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