A freeze-proof and low-temperature resistant oil well valve

Abstract

The present invention belongs to the technical field of antifreeze valves, and in particular discloses an antifreeze and low-temperature resistant oil well valve, comprising a valve shell, an inner flow channel provided inside the valve shell, both ends of the inner flow channel extending to one side of the valve shell, and a threaded groove provided on the bottom of the valve shell; the present invention, by arranging an adjusting component, a flow blocker, a heating component and an electrical connection protection device, is conducive to heating the interior of the valve when the valve is closed to prevent the fluid inside the valve from freezing; the adjusting component can change the minimum pressure conduction upper limit of the valve; the flow blocker can prevent the flow inside the inner flow channel from flowing too much and causing a series of effects on external equipment; the flow blocker can play a role of feedback regulation when the flow is too large; the heating component can heat the valve when the valve is closed to prevent the internal liquid from freezing; the electrical connection protection device can prevent the internal liquid of the valve from contacting the connection to cause a short circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of antifreeze valves, in particular to an antifreeze and low-temperature resistant oil production well valve. Background Art

[0002] Petroleum is a fluid mineral buried deep underground. Originally, people referred to naturally occurring oily liquid minerals as petroleum, combustible gas as natural gas, and solid, flammable oily minerals as asphalt. As research on these minerals deepened, it was realized that they all belonged to the hydrocarbon family and were related in origin, so they were collectively referred to as petroleum. During the oil extraction process, pipelines are used to transport crude oil, and valves are used to control the flow of these pipelines.

[0003] When a valve is closed for extended periods in low-temperature environments, the liquid in the valve's internal passages freezes because it cannot flow. Thawing in low-temperature environments is difficult, and improper pouring methods can further exacerbate the situation. Freezing of the pouring liquid can also make sampling more difficult. External heating methods consume high power and are inefficient in thawing when insulation measures are inadequate. Summary of the Invention

[0004] The purpose of the present invention is to provide a freeze-proof low-temperature resistant oil well valve, which solves the problem that when the valve is used in a low-temperature environment, the liquid in the internal passage is easily frozen when the valve is closed.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: an antifreeze and low-temperature resistant oil well valve, comprising a valve housing, an inner flow channel is defined within the valve housing, both ends of the inner flow channel extend through one side of the valve housing, a threaded groove is defined at the bottom of the valve housing, a hexagonal groove is defined at the top of the threaded groove, an adjustment assembly for adjusting the minimum conduction pressure of the valve is disposed within the hexagonal groove, a sealing ring is fixed between the inner walls of the inner flow channel, a valve core is disposed within the inner flow channel, an outer surface of the valve core is in sealing contact with the bottom of the sealing ring near the top edge;

[0006] The inner wall of the inner flow channel is provided with a flow-blocking member to prevent excessive internal flow. A heating chamber is provided inside the valve housing near the edges on both sides, and a heating component is provided inside the two heating chambers. Adjustment grooves are provided on the inner walls on both sides of the inner flow channel, and electrical connection protection devices are provided inside the two adjustment grooves.

[0007] Preferably, a digital display screen is provided on the front side of the valve housing, connecting pipes are fixed at two openings of the inner flow channel on one side of the valve housing, and a docking groove is provided on the rear side of the valve housing extending through both sides.

[0008] Preferably, the adjustment assembly includes a hexagonal adjustment plate, which is slidably connected between the inner walls of the hexagonal groove, and a hexagonal lifting plate is provided between the inner walls of the hexagonal groove near the top edge, and a compression spring is fixed between the bottom of the hexagonal lifting plate and the top of the hexagonal adjustment plate, and the bottom of the hexagonal adjustment plate is rotatably connected to an adjustment stud, and the outer surface of the adjustment stud is threadedly connected to the inner wall of the threaded groove.

[0009] Preferably, a sleeve rod is fixed to the bottom of the valve core, the interior of the sleeve rod is hollow, the bottom of the sleeve rod slides through the interior of the hexagonal groove and is fixed to the top of the hexagonal lifting plate, the bottom of the sleeve rod and the bottom of the hexagonal lifting plate are connected to each other, the top of the hexagonal adjustment plate is located in the middle and a scale rod is fixed, the scale rod is slidably connected to the interior of the sleeve rod, and the top of the scale rod slides through to the top of the valve housing, and the valve core is slidably connected to the outer surface of the scale rod.

[0010] Preferably, the baffle includes an arc-shaped baffle plate, and an annular adjustment chamber is provided inside the valve housing above the sealing ring. Side openings are provided on the inner bottom surface of the annular adjustment chamber near the edges on both sides, and a first mounting groove is provided on the inner wall of one side of the two side openings near the bottom edge, and a plurality of second mounting grooves are provided on the inner wall of one side of the annular adjustment chamber at equal intervals along the circumferential direction.

[0011] Preferably, a torque shaft is provided between the inner walls of the two second mounting grooves and between the inner walls of the multiple first mounting grooves, the outer surfaces of one side of the multiple torque shafts extend to the interior of the inner flow channel, the outer surface of the other side of the torque shaft located in the first mounting groove extends to the interior of the side port, and the outer surface of the other side of the torque shaft located in the second mounting groove extends to the interior of the annular adjustment cavity.

[0012] Preferably, a shift rod is fixed to the outer surface of one side of the torque shaft located in the first mounting groove, one end of the shift rod extends to the bottom of the valve core, and a rocker is fixed to the other side of the torque shaft located in the first mounting groove, and the rocker is located inside the side port, and the arc-shaped baffle is installed on the outer surface of one side of the torque shaft located in the second mounting groove, and one side outer surface of the arc-shaped baffle is in contact with the inner wall of the inner flow channel, and a contact plate is fixed to the outer surface of the other side of the torque shaft located in the second mounting groove, and the contact plate extends obliquely toward the interior of the annular adjustment cavity, and a lifting ring is provided on the inner bottom surface of the annular adjustment cavity, one end of the contact plate is connected to the top of the lifting ring through a universal joint, and connecting rods are fixed to the bottom of the lifting ring near the two side edges, and the bottoms of the two connecting rods extend to respectively fit with the top of the rocker.

[0013] Preferably, the heating component includes a heating resistance wire, and a plurality of ceramic rods are fixed at equal distances between the inner top and bottom surfaces of the two heating chambers. The heating resistance wires are correspondingly wound on the outer surfaces of the ceramic rods. Copper contacts are fixed on the inner walls of one side of the two adjusting grooves, and copper rods are fixed on both sides of the valve core. Rubber sleeves are provided on the outer surfaces of the two copper rods, and one end of the two rubber sleeves is sealed and fitted with the inner bottom surface of the adjusting groove. One end of the two copper rods extends to the interior of the adjusting groove and contacts with the copper contacts. The two copper contacts are electrically connected to the plurality of heating resistance wires.

[0014] Preferably, the electrical connection protection device includes a sealing plate, which is slidably connected to the inside of the adjustment groove, one side of the sealing plate is arc-shaped and is sealed to the outer surface of the rubber sleeve, the bottom of the sealing plate is sealed to the copper contact, and the inner top surfaces of the two adjustment grooves are each provided with a reciprocating cavity, and the tops of the two sealing plates are slidably extended into the inside of the reciprocating cavity.

[0015] Preferably, a guide rod is fixed to the inner top surface of the two reciprocating cavities, and the bottom of the two guide rods slides and extends into the interior of the sealing plate. A reciprocating spring is connected between the top of the sealing plate and the inner top surface of the reciprocating cavity, and the reciprocating spring is wound on the outer surface of the guide rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention is provided with an adjustment component, a flow blocker, a heating component and an electrical connection protection device, which is conducive to heating the interior of the valve when the valve is closed to prevent the fluid inside the valve from freezing. It can also play a feedback adjustment role when the flow inside the valve is too large, preventing a series of effects caused by excessive flow on external load equipment.

[0018] 2. The present invention is provided with an adjustment assembly to change the upper limit of the minimum pressure conduction of the valve. When the adjustment assembly is in operation, the hexagonal adjustment plate is driven up and down by rotating the adjustment stud, thereby changing the elastic force of the compression spring. When the elastic force changes, the sealing strength between the valve core and the sealing ring also changes accordingly, thereby achieving the purpose of controlling the minimum conduction pressure of the valve;

[0019] 3. The present invention provides a flow blocker to prevent excessive flow in the inner flow channel from affecting external equipment. When the flow blocker is working, when the flow rate in the inner flow channel is large, the top of the arc-shaped flow blocker on the torque shaft will flip toward the inner flow channel, thereby playing a role in flow blocking.

[0020] 4. The present invention is provided with a heating component and an electrical connection protection device. The heating component can heat the valve when the valve is closed to prevent the internal liquid from freezing. When the heating component is working, the copper rod and the copper contact are in contact with each other, so that the heating resistance wire can heat up and work. The electrical connection protection device can protect the connection when opening and closing the heating component to prevent the liquid inside the valve from contacting the connection and causing a short circuit. When the electrical connection protection device is working, the arc-shaped opening at one end of the sealing plate is sealed with the outer surface of the rubber sleeve, and at the same time, one end of the rubber sleeve is sealed with the inner bottom surface of the adjusting groove, so that the copper contact and the sealing plate can be in a sealed state when the copper rod and the copper contact are in contact and separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention provides a schematic diagram of the main three-dimensional structure of an antifreeze and low-temperature resistant oil well valve;

[0022] Figure 2 The present invention provides a schematic diagram of a side sectional perspective structure of an antifreeze and low-temperature resistant oil well valve;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the other side of a freeze-proof and low-temperature resistant oil well valve proposed by the present invention;

[0024] Figure 4 The present invention provides a schematic cross-sectional perspective structural diagram of a valve housing in a freeze-proof, low-temperature-resistant oil well valve;

[0025] Figure 5 For the present invention Figure 2 A partial enlarged view of point A in the middle;

[0026] Figure 6 For the present invention Figure 3 A partial enlarged view of point B in the middle;

[0027] Figure 7 For the present invention Figure 4 A magnified partial view of point C in the middle.

[0028] In the figure: 1. valve housing; 2. connecting pipe; 3. digital display screen; 4. scale rod; 5. inner flow channel; 6. heating chamber; 7. ceramic rod; 8. heating resistance wire; 9. hexagonal groove; 10. threaded groove; 11. hexagonal lifting plate; 12. compression spring; 13. hexagonal adjustment plate; 14. adjusting stud; 15. sleeve rod; 16. docking groove; 17. annular adjustment chamber; 18. sealing ring; 19. valve core; 20. side port; 21. first mounting groove; 22. torque shaft; 23. rocker; 24. lever; 25. contact plate; 26. arc-shaped spoiler; 27. adjusting groove; 28. rubber sleeve; 29. ​​copper rod; 30. copper contact; 31. reciprocating chamber; 32. sealing plate; 33. guide rod; 34. reciprocating spring; 35. connecting rod; 36. lifting ring; 37. second mounting groove. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] See also Figure 1-7 The present invention provides a technical solution: an antifreeze and low-temperature resistant oil well valve, comprising a valve housing 1, an inner flow channel 5 is formed inside the valve housing 1, both ends of the inner flow channel 5 pass through one side of the valve housing 1, a threaded groove 10 is formed at the bottom of the valve housing 1, a hexagonal groove 9 is formed at the top of the threaded groove 10, an adjusting component for adjusting the minimum conduction pressure of the valve is provided inside the hexagonal groove 9, a sealing ring 18 is fixed between the inner walls of the inner flow channel 5, a valve core 19 is provided inside the inner flow channel 5, and the outer surface of the valve core 19 is in sealing contact with the bottom of the sealing ring 18 near the top edge;

[0031] The inner wall of the inner flow channel 5 is provided with a flow-blocking member to prevent excessive internal flow. A heating chamber 6 is provided inside the valve housing 1 near the edges on both sides, and a heating component is provided inside the two heating chambers 6. Adjustment grooves 27 are provided on the inner walls on both sides of the inner flow channel 5, and electrical connection protection devices are provided inside the two adjusting grooves 27. A digital display screen 3 is provided on the front side of the valve housing 1, and connecting pipes 2 are fixed at two openings of the inner flow channel 5 on one side of the valve housing 1. A docking groove 16 that runs through both sides is provided on the rear side of the valve housing 1.

[0032] The effect achieved is that both ends of the inner flow channel 5 are passed through one side of the valve housing 1, which is convenient for subsequent docking with the connecting pipe 2, and the outer surface of the valve core 19 is sealed with the bottom of the sealing ring 18 near the top edge, so that the inner flow channel 5 can be closed, and the minimum pressure conduction upper limit of the valve can be changed by the adjustment component. The flow blocking component can prevent the internal flow of the inner flow channel 5 from being too large and causing a series of effects on external equipment. The flow blocking component can play a role of feedback regulation when the flow is too large. The heating component can heat the valve when the valve is closed to prevent the internal liquid from freezing. The electrical connection protection device can protect the connection when the heating component is opened and closed to prevent the internal liquid of the valve from contacting the connection and causing a short circuit.

[0033] like Figure 2 、 Figure 3 and Figure 4 As shown, the adjustment assembly includes a hexagonal adjustment plate 13, which is slidably connected between the inner walls of the hexagonal groove 9. A hexagonal lifting plate 11 is provided between the inner walls of the hexagonal groove 9 near the top edge. A compression spring 12 is fixed between the bottom of the hexagonal lifting plate 11 and the top of the hexagonal adjustment plate 13. The bottom of the hexagonal adjustment plate 13 is rotatably connected to an adjusting stud 14. The outer surface of the adjusting stud 14 is threadedly connected to the inner wall of the threaded groove 10. A sleeve rod 15 is fixed to the bottom of the valve core 19. The interior of the sleeve rod 15 is hollow. The bottom of the sleeve rod 15 slides through the interior of the hexagonal groove 9 and is fixed at the top of the hexagonal lifting plate 11. The bottom of the sleeve rod 15 and the bottom of the hexagonal lifting plate 11 are connected to each other. The top of the hexagonal adjustment plate 13 is located in the middle to fix the scale rod 4. The scale rod 4 is slidably connected to the interior of the sleeve rod 15, and the top of the scale rod 4 slides through the top of the valve housing 1, and the valve core 19 is slidably connected to the outer surface of the scale rod 4.

[0034] The effect achieved is that the hexagonal adjusting plate 13 and the hexagonal lifting plate 11 are slidably connected between the inner walls of the hexagonal groove 9, which can prevent the hexagonal adjusting plate 13 and the hexagonal lifting plate 11 from rotating during the adjustment process. The hexagonal adjusting plate 13 is driven up and down by rotating the adjusting stud 14, thereby changing the relative distance between the hexagonal adjusting plate 13 and the hexagonal lifting plate 11, and then changing the elastic force of the compression spring 12. The elastic force of the compression spring 12 acts on the valve core 19 through the sleeve rod 15. When the elastic force changes, the sealing strength between the valve core 19 and the sealing ring 18 will also change accordingly, thereby achieving the purpose of controlling the minimum conduction pressure of the valve. At the same time, the top of the scale rod 4 is slid through the top of the valve housing 1. When adjusting the elastic force of the compression spring 12, the elastic force of the compression spring 12 can be judged by the length of the top of the scale rod 4, thereby obtaining the minimum conduction pressure value of the valve.

[0035] like Figure 2 、 Figure 3 and Figure 5 As shown, the baffle includes an arc-shaped baffle plate 26, and an annular adjustment chamber 17 is opened inside the valve housing 1 above the sealing ring 18. The inner bottom surface of the annular adjustment chamber 17 is provided with side ports 20 near the edges on both sides, and the inner walls of one side of the two side ports 20 are provided with a first mounting groove 21 near the bottom edge. A plurality of second mounting grooves 37 are opened on the inner wall of one side of the annular adjustment chamber 17 at equal intervals along the circumferential direction, and a torque shaft 22 is provided between the inner walls of the two second mounting grooves 37 and between the inner walls of the plurality of first mounting grooves 21. The outer surfaces of one side of the plurality of torque shafts 22 extend to the interior of the inner flow channel 5, the outer surface of the other side of the torque shaft 22 located in the first mounting groove 21 extends to the interior of the side port 20, the outer surface of the other side of the torque shaft 22 located in the second mounting groove 37 extends to the interior of the annular adjustment chamber 17, and the torque shaft 22 located in the first mounting groove 21 is provided with a torque shaft 22. A shift rod 24 is fixed to the outer surface of one side of the shaft 22, and one end of the shift rod 24 extends to the bottom of the valve core 19. A rocker 23 is fixed to the other side of the torque shaft 22 located in the first mounting groove 21, and the rocker 23 is located inside the side port 20. The arc-shaped spoiler 26 is installed on the outer surface of one side of the torque shaft 22 located in the second mounting groove 37, and the outer surface of one side of the arc-shaped spoiler 26 is in contact with the inner wall of the inner flow channel 5. A contact plate 25 is fixed to the outer surface of the other side of the torque shaft 22 located in the second mounting groove 37. The contact plate 25 extends obliquely toward the interior of the annular adjustment chamber 17. A lifting ring 36 is provided on the inner bottom surface of the annular adjustment chamber 17. One end of the contact plate 25 is connected to the top of the lifting ring 36 through a universal joint. Connecting rods 35 are fixed to the bottom of the lifting ring 36 near the two side edges, and the bottoms of the two connecting rods 35 extend to fit with the top of the rocker 23.

[0036] The effect achieved is that the outer surface of one side of the arc-shaped flow blocking plate 26 is fitted with the inner wall of the inner flow channel 5, so that no resistance is generated between the liquid flowing in the inner flow channel 5, and the flow blocking member is prevented from being triggered when the liquid in the inner flow channel 5 flows normally. When the flow rate flowing through the inner flow channel 5 is large, the valve core 19 is pressed downward, so that the opening between the top of the valve core 19 and the sealing ring 18 is larger. When the valve core 19 slides downward a large distance, the bottom of the valve core 19 contacts one end of the lever 24, pressing the lever 24 downward, thereby The torque shaft 22 is driven to rotate. When the torque shaft 22 rotates, the rocker plate 23 will lift the connecting rod 35 upward, thereby driving the lifting ring 36 to move upward to lift the multiple contact plates 25 upward. When the contact plate 25 moves upward, the top of the arc-shaped spoiler 26 on the torque shaft 22 will flip toward the inner flow channel 5, thereby playing a role in blocking the flow. When the flow rate inside the inner flow channel 5 is small, the valve core 19 moves upward. At this time, under the action of the torque force of the torque shaft 22, the arc-shaped spoiler 26, the lever 24, the rocker plate 23 and the contact plate 25 will be driven to reset.

[0037] like Figure 2-7As shown, the heating component includes a heating resistance wire 8, and a plurality of ceramic rods 7 are fixed at equal distances between the inner top and bottom surfaces of the two heating chambers 6. The heating resistance wire 8 is correspondingly wound on the outer surface of the ceramic rod 7. Copper contacts 30 are fixed to the inner walls of one side of the two adjustment grooves 27, and copper rods 29 are fixed on both sides of the valve core 19. Rubber sleeves 28 are provided on the outer surfaces of the two copper rods 29. One end of the two rubber sleeves 28 is sealed and fitted with the inner bottom surface of the adjustment groove 27. One end of the two copper rods 29 extends to the interior of the adjustment groove 27 and contacts with the copper contacts 30. The two copper contacts 30 are electrically connected to the plurality of heating resistance wires 8, and the electrical connection protection device is provided. It includes a sealing plate 32, which is slidably connected to the inside of the adjustment groove 27. One side of the sealing plate 32 is arc-shaped and seals with the outer surface of the rubber sleeve 28. The bottom of the sealing plate 32 is seals with the copper contact 30. The inner top surfaces of the two adjustment grooves 27 are each provided with a reciprocating cavity 31. The tops of the two sealing plates 32 slide and extend into the inside of the reciprocating cavity 31. The inner top surfaces of the two reciprocating cavities 31 are fixed with guide rods 33. The bottoms of the two guide rods 33 slide and extend into the inside of the sealing plate 32. A reciprocating spring 34 is connected between the top of the sealing plate 32 and the inner top surface of the reciprocating cavity 31. The reciprocating spring 34 is wound around the outer surface of the guide rod 33.

[0038] The effect achieved is that the valve can be heated by the heating component when the valve is closed to prevent the internal liquid from freezing. When the heating component is working, the valve needs to be closed first so that the copper rod 29 and the copper contact 30 are in contact with each other, and the electrical connection can be completed to make the heating resistance wire 8 work. The heating resistance wire 8 is wound around the outer surface of the ceramic rod 7. The non-thermal conductivity of the ceramic can be used to prevent the heating resistance wire 8 from burning and damaging the connection. The electrical connection protection device can protect the connection when opening and closing the heating component to prevent the internal liquid of the valve from contacting the connection and causing a short circuit. When the protective device is working, the movement of the valve core 19 will drive the copper rod 29 to move. During the movement, the arc-shaped opening of the sealing plate 32 is sealed and connected with the outer surface of the rubber sleeve 28. At the same time, one end of the rubber sleeve 28 is sealed and fitted with the inner bottom surface of the adjustment groove 27. Therefore, when the copper rod 29 contacts and separates from the copper contact 30, the copper contact 30 and the sealing plate 32 are in a sealed state. At the same time, during the sliding process of the sealing plate 32, the reciprocating spring 34 is pressed to make the seal between it and the rubber sleeve 28 tighter, and the guide rod 33 guides the sliding of the sealing plate 32 more stable.

[0039] Working principle: When using this device, by setting the adjustment component, the flow blocking component, the heating component and the electrical connection protection device, it is beneficial to heat the inside of the valve when the valve is closed to prevent the fluid inside the valve from freezing. By rotating the adjustment stud 14, the hexagonal adjustment plate 13 is driven up and down, thereby changing the elastic force of the compression spring 12. The elastic force of the compression spring 12 acts on the valve core 19 through the sleeve rod 15. When the elastic force changes, the sealing strength between the valve core 19 and the sealing ring 18 will also change accordingly, thereby achieving the purpose of controlling the minimum conduction pressure of the valve.

[0040] When the valve is in use, when the flow rate flowing through the inner flow channel 5 is large, the valve core 19 will be pressed downward, so that the opening between the top of the valve core 19 and the sealing ring 18 is larger. When the valve core 19 slides downward a large distance, the bottom of the valve core 19 will contact one end of the shift rod 24, pressing one end of the shift rod 24 downward, thereby driving the torque shaft 22 to rotate. When the torque shaft 22 rotates, the rocker plate 23 will lift the connecting rod 35 upward, thereby driving the lifting ring 36 to move upward to lift multiple contact plates 25 upward. When the contact plate 25 moves upward, the top of the arc-shaped flow blocking plate 26 on the torque shaft 22 will flip toward the inner flow channel 5, thereby playing a role in blocking flow.

[0041] The movement of the valve core 19 will drive the copper rod 29 to move. During the movement, the arc-shaped opening of the sealing plate 32 is sealed and connected with the outer surface of the rubber sleeve 28. At the same time, one end of the rubber sleeve 28 is sealed and fitted with the inner bottom surface of the adjusting groove 27. Therefore, when the copper rod 29 contacts or separates from the copper contact 30, the copper contact 30 and the sealing plate 32 are in a sealed state. At the same time, during the sliding process of the sealing plate 32, the reciprocating spring 34 is pressed to make the seal between it and the rubber sleeve 28 tighter, and the guide rod 33 is guided to make its sliding more stable. When the valve is closed, the copper rod 29 and the copper contact 30 contact each other, and the electrical connection is completed, so that the heating resistance wire 8 works to heat the valve to prevent the internal liquid from freezing.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A freeze-proof low-temperature resistant oil well valve, characterized in that: The valve housing (1) comprises a valve housing (1), wherein an inner flow channel (5) is provided inside the valve housing (1), both ends of the inner flow channel (5) extend through one side of the valve housing (1), a thread groove (10) is provided at the bottom of the valve housing (1), a hexagonal groove (9) is provided at the top of the thread groove (10), an adjusting component for adjusting the minimum conduction pressure of the valve is provided inside the hexagonal groove (9), a sealing ring (18) is fixed between the inner walls of the inner flow channel (5), a valve core (19) is provided inside the inner flow channel (5), and an outer surface of the valve core (19) is in sealing contact with the bottom of the sealing ring (18) near the top edge; The inner wall of the inner flow channel (5) is provided with a flow-blocking member to prevent excessive internal flow; the interior of the valve housing (1) is provided with a heating chamber (6) near both side edges; the interiors of the two heating chambers (6) are provided with a heating assembly; the inner walls of both sides of the inner flow channel (5) are provided with an adjustment groove (27); the interiors of the two adjustment grooves (27) are provided with an electrical connection protection device.

2. The antifreeze and low-temperature resistant oil well valve according to claim 1, characterized in that: A digital display screen (3) is provided on the front side of the valve housing (1), connecting pipes (2) are fixed at two openings of the inner flow channel (5) on one side of the valve housing (1), and a docking groove (16) extending through both sides is provided on the rear side of the valve housing (1).

3. The antifreeze and low-temperature resistant oil well valve according to claim 1, characterized in that: The adjustment assembly includes a hexagonal adjustment plate (13), the hexagonal adjustment plate (13) is slidably connected between the inner walls of the hexagonal groove (9), a hexagonal lifting plate (11) is provided between the inner walls of the hexagonal groove (9) near the top edge, a compression spring (12) is fixed between the bottom of the hexagonal lifting plate (11) and the top of the hexagonal adjustment plate (13), an adjustment stud (14) is rotatably connected to the bottom of the hexagonal adjustment plate (13), and the outer surface of the adjustment stud (14) is threadedly connected to the inner wall of the threaded groove (10).

4. The antifreeze and low-temperature resistant oil well valve according to claim 3, characterized in that: A sleeve rod (15) is fixed to the bottom of the valve core (19), and the interior of the sleeve rod (15) is hollow. The bottom of the sleeve rod (15) slides through the interior of the hexagonal groove (9) and is fixed to the top of the hexagonal lifting plate (11). The bottom of the sleeve rod (15) and the bottom of the hexagonal lifting plate (11) are connected to each other. The top of the hexagonal adjustment plate (13) is located in the middle to fix the scale rod (4). The scale rod (4) is slidably connected to the interior of the sleeve rod (15), and the top of the scale rod (4) slides through the top of the valve housing (1). The valve core (19) is slidably connected to the outer surface of the scale rod (4).

5. The antifreeze and low-temperature resistant oil well valve according to claim 1, characterized in that: The flow-blocking member comprises an arc-shaped flow-blocking plate (26); an annular regulating chamber (17) is provided inside the valve housing (1) above the sealing ring (18); a side opening (20) is provided on the inner bottom surface of the annular regulating chamber (17) near both side edges; a first mounting groove (21) is provided on the inner wall of one side of the two side openings (20) near the bottom edge; and a plurality of second mounting grooves (37) are provided on the inner wall of one side of the annular regulating chamber (17) at equal intervals along the circumferential direction.

6. The antifreeze and low-temperature resistant oil well valve according to claim 5, characterized in that: A torque shaft (22) is provided between the inner walls of the two second mounting grooves (37) and between the inner walls of the plurality of first mounting grooves (21), and one side outer surface of the plurality of torque shafts (22) extends to the interior of the inner flow channel (5), the other side outer surface of the torque shaft (22) located in the first mounting groove (21) extends to the interior of the side opening (20), and the other side outer surface of the torque shaft (22) located in the second mounting groove (37) extends to the interior of the annular adjustment chamber (17).

7. The antifreeze and low-temperature resistant oil well valve according to claim 6, characterized in that: A lever (24) is fixed to the outer surface of one side of the torque shaft (22) located in the first installation groove (21), and one end of the lever (24) extends toward the bottom of the valve core (19). A seesaw (23) is fixed to the other side of the torque shaft (22) located in the first installation groove (21), and the seesaw (23) is located inside the side opening (20). The arc-shaped flow blocking plate (26) is installed on the outer surface of one side of the torque shaft (22) located in the second installation groove (37), and the outer surface of one side of the arc-shaped flow blocking plate (26) is in contact with the inner wall of the inner flow channel (5). A contact plate (25) is fixed to the outer surface of the other side of the torque shaft (22) located in the second mounting groove (37), and the contact plate (25) extends obliquely toward the inside of the annular adjustment cavity (17). A lifting ring (36) is provided on the inner bottom surface of the annular adjustment cavity (17), and one end of the contact plate (25) is connected to the top of the lifting ring (36) through a universal joint. Connecting rods (35) are fixed to the bottom of the lifting ring (36) near the edges on both sides, and the bottoms of the two connecting rods (35) extend to fit with the top of the rocker (23).

8. The antifreeze and low-temperature resistant oil well valve according to claim 1, characterized in that: The heating assembly includes a heating resistance wire (8), a plurality of ceramic rods (7) are fixed at equal distances between the inner top and bottom surfaces of the two heating chambers (6), the heating resistance wire (8) is correspondingly wound on the outer surface of the ceramic rod (7), a copper contact (30) is fixed on one side inner wall of the two adjustment grooves (27), a copper rod (29) is fixed on both sides of the valve core (19), a rubber sleeve (28) is provided on the outer surface of the two copper rods (29), one end of the two rubber sleeves (28) is correspondingly sealed with the inner bottom surface of the adjustment groove (27), one end of the two copper rods (29) is correspondingly extended to the inside of the adjustment groove (27) and in contact with the copper contact (30), and the two copper contacts (30) are electrically connected to the plurality of heating resistance wires (8).

9. The antifreeze and low-temperature resistant oil well valve according to claim 8, characterized in that: The electrical connection protection device includes a sealing plate (32), which is slidably connected to the inside of the adjustment groove (27), one side of the sealing plate (32) is arc-shaped and is sealed to the outer surface of the rubber sleeve (28), the bottom of the sealing plate (32) is sealed to the copper contact (30), and the inner top surfaces of the two adjustment grooves (27) are each provided with a reciprocating cavity (31), and the tops of the two sealing plates (32) are slidably extended into the inside of the reciprocating cavity (31).

10. The antifreeze and low-temperature resistant oil well valve according to claim 9, characterized in that: A guide rod (33) is fixed to the inner top surface of the two reciprocating cavities (31), and the bottom of the two guide rods (33) slides and extends into the interior of the sealing plate (32). A reciprocating spring (34) is connected between the top of the sealing plate (32) and the inner top surface of the reciprocating cavity (31), and the reciprocating spring (34) is wound on the outer surface of the guide rod (33).

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