Anti-freezing low-temperature-resistant producing well valve

Abstract

The invention belongs to the technical field of anti-freezing valves, and particularly discloses an anti-freezing low-temperature-resistant oil producing well valve which comprises a valve shell, an inner flow channel is formed in the valve shell, the two ends of the inner flow channel penetrate to one side of the valve shell, and a threaded groove is formed in the bottom of the valve shell; according to the valve, by arranging the adjusting assembly, the flow blocking piece, the heating assembly and the electric connection protection device, the interior of the valve can be heated easily when the valve is closed, the phenomenon that fluid in the valve is frozen is prevented, and the lowest pressure conduction upper limit of the valve can be changed through the adjusting assembly; a series of influences on external equipment due to too large flow in the inner flow channel can be prevented through the flow blocking piece, the flow blocking piece can play a role in feedback adjustment when the flow is too large, the heating assembly can heat the valve when the valve is closed, internal liquid is prevented from being frozen, and the service life of the valve is prolonged. The electric connection protection device can prevent the short circuit phenomenon caused by contact between liquid in the valve and the joint.

Description

Technical Field

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

[0002] Petroleum is a fluid mineral buried deep underground. Initially, people called the oily liquid mineral produced in nature petroleum, the combustible gas natural gas, and the solid flammable oil mineral asphalt. With the in-depth study of these minerals, it is realized that they are all hydrocarbon compounds in composition and are related to each other in origin, so they are collectively called petroleum. In the process of petroleum extraction, pipelines are needed to transport crude oil, and valves are needed to control the opening and closing of the pipelines during the transportation process.

[0003] When the valve is closed for a long time in a low temperature environment, the liquid in the valve internal passage will freeze because the liquid cannot flow inside the valve. Thawing work is more difficult in a low temperature environment. Improper pouring methods will lead to further deterioration. For example, freezing of the pouring liquid will also make sampling more difficult. External heating methods consume high power and have low thawing efficiency when insulation measures are poor. Summary of the invention

[0004] The purpose of the present invention is to provide an antifreeze and 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 after the valve is closed.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an antifreeze and low-temperature resistant oil well valve, comprising a valve housing, an inner flow channel is provided inside the valve housing, both ends of the inner flow channel penetrate to one side of the valve housing, a thread groove is provided at the bottom of the valve housing, a hexagonal groove is provided at the top of the thread groove, an adjusting component for adjusting the minimum conduction pressure of the valve is provided inside the hexagonal groove, a sealing ring is fixed between the inner walls of the inner flow channel, a valve core is provided inside the inner flow channel, and the outer surface of the valve core is sealed and fitted with the bottom of the sealing ring near the top edge; The inner wall of the inner flow channel is provided with a flow-blocking member to prevent excessive internal flow; the interior of the valve housing is provided with a heating chamber near the edges on both sides; the interiors of the two heating chambers are provided with a heating assembly; the inner walls on both sides of the inner flow channel are provided with an adjustment groove; the interiors of the two adjustment grooves are provided with an electrical connection protection device.

[0006] 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 penetrating to both sides is provided on the rear side of the valve housing.

[0007] Preferably, the adjustment assembly includes a hexagonal adjustment plate, which is slidably connected between the inner walls of the hexagonal groove, a hexagonal lifting plate is arranged between the inner walls of the hexagonal groove near the top edge, a compression spring is fixed between the bottom of the hexagonal lifting plate and the top of the hexagonal adjustment plate, an adjustment stud is rotatably connected to the bottom of the hexagonal adjustment plate, and the outer surface of the adjustment stud is threadedly connected to the inner wall of the threaded groove.

[0008] 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 to fix a scale rod, the scale rod is slidably connected to the interior of the sleeve rod, and the top of the scale rod slides through the top of the valve housing, and the valve core is slidably connected to the outer surface of the scale rod.

[0009] Preferably, the baffle comprises an arc-shaped baffle plate, 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 two side edges, 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.

[0010] Preferably, a torque shaft is arranged 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.

[0011] Preferably, a lever is fixed to the outer surface of one side of the torque shaft located in the first mounting groove, one end of the lever extends to the bottom of the valve core, a seesaw is fixed to the other side of the torque shaft located in the first mounting groove, the seesaw is located inside the side opening, 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, a contact plate is fixed to the outer surface of the other side of the torque shaft located in the second mounting groove, the contact plate extends obliquely toward the inside of the annular adjustment cavity, 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, 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 correspondingly to fit with the top of the seesaw.

[0012] Preferably, the heating component includes a heating resistance wire, a plurality of ceramic rods are equidistantly fixed between the inner top and bottom surfaces of the two heating chambers, the heating resistance wires are correspondingly wound around the outer surfaces of the ceramic rods, a copper contact is fixed to the inner wall of one side of the two adjusting grooves, a copper rod is fixed on both sides of the valve core, a rubber sleeve is provided on the outer surface of the two copper rods, one end of the two rubber sleeves is correspondingly sealed with the inner bottom surface of the adjusting groove, one end of the two copper rods is correspondingly extended to the interior of the adjusting groove and in contact with the copper contact, and the two copper contacts are electrically connected to the plurality of heating resistance wires.

[0013] 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 seals and fits with the outer surface of the rubber sleeve, the bottom of the sealing plate seals and fits with the copper contact, and the inner top surfaces of the two adjustment grooves are provided with reciprocating cavities, and the tops of the two sealing plates slide and extend into the inside of the reciprocating cavities.

[0014] Preferably, guide rods are fixed to the inner top surfaces of the two reciprocating cavities, and the bottoms of the two guide rods slide and extend 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 around the outer surface of the guide rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with an adjustment component, a flow blocking member, a heating component and an electrical connection protection device, which is conducive to heating the inside of the valve when the valve is closed to prevent the fluid inside the valve from freezing, and can play a role of feedback regulation when the flow inside the valve is too large to prevent a series of effects on external load equipment caused by excessive flow; 2. The present invention can change the upper limit of the minimum pressure conduction of the valve by providing an adjustment component. When the adjustment component is working, the hexagonal adjustment plate is driven to move 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 will also change accordingly, thereby achieving the purpose of controlling the minimum conduction pressure of the valve; 3. The present invention is provided with a flow blocker to prevent the excessive flow in the inner flow channel from causing a series of effects on external equipment. When the flow blocker is working, when the flow in the inner flow channel is large, the top of the arc-shaped flow blocker on the torque shaft will turn toward the inner flow channel, thereby playing a role in flow blocking; 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 resistor wire can heat up and work. 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. When the electrical connection protection device is working, the arc-shaped opening at one end of the sealing plate is sealed and connected to the outer surface of the rubber sleeve, and at the same time, one end of the rubber sleeve is sealed and fitted with the inner bottom surface of the adjusting groove, so that when the copper rod and the copper contact are in contact and separation, the copper contact and the sealing plate are in a sealed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention provides a main perspective structural diagram of an antifreeze and low-temperature resistant oil well valve; Figure 2 The present invention provides a one-side cross-sectional three-dimensional structural schematic diagram of an antifreeze and low-temperature resistant oil well valve; Figure 3 The present invention provides a sectional three-dimensional structural diagram of another side of an antifreeze and low-temperature resistant oil well valve; Figure 4 The present invention provides a cross-sectional three-dimensional structural diagram of a valve housing in a freeze-proof, low-temperature resistant oil well valve; Figure 5 For the present invention Figure 2 A partial enlarged view of point A in the middle; Figure 6 For the present invention Figure 3 A partial enlarged view of point B in the middle; Figure 7 For the present invention Figure 4 A magnified partial view of point C in the middle.

[0017] 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. adjustment stud; 15. sleeve rod; 16. docking groove; 17. annular adjustment chamber; 18. sealing ring; 19. valve core; 20. side port; 21. first installation groove; 22. torque shaft; 23. rocker; 24. lever; 25. contact plate; 26. arc-shaped baffle; 27. adjustment 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 installation groove. DETAILED DESCRIPTION

[0018] 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 implementation regulations described 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.

[0019] 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 provided inside the valve housing 1, both ends of the inner flow channel 5 penetrate to 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 the outer surface of the valve core 19 is sealed and fitted 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. 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 adjustment 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, and a docking groove 16 that penetrates to both sides is provided on the rear side of the valve housing 1.

[0020] The effect achieved is that both ends of the inner flow channel 5 are passed through one side of the valve housing 1 to facilitate the subsequent docking with the connecting pipe 2, and the outer surface of the valve core 19 is sealed and fitted 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 in 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.

[0021] like Figure 2 , Figure 3 and Figure 4As shown, the adjustment component includes a hexagonal adjustment plate 13, which is slidably connected between the inner walls of the hexagonal groove 9, and a hexagonal lifting plate 11 is arranged between the inner walls of the hexagonal groove 9 near the top edge, and a compression spring 12 is fixed between the bottom of the hexagonal lifting plate 11 and the top of the hexagonal adjustment plate 13, and an adjusting stud 14 is rotatably connected to the bottom of the hexagonal adjustment plate 13, and the outer surface of the adjusting stud 14 is threadedly connected to the inner wall of the threaded groove 10, and a sleeve rod 15 is fixed to the bottom of the valve core 19, and the interior of the sleeve rod 15 is hollow, and 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, and the bottom of the sleeve rod 15 is connected to the bottom of the hexagonal lifting plate 11. The scale rod 4 is fixed at the top of the hexagonal adjustment plate 13 in the middle, and 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.

[0022] The effect achieved is that the hexagonal adjustment 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 adjustment plate 13 and the hexagonal lifting plate 11 from rotating during the adjustment process. The hexagonal adjustment plate 13 is driven to move up and down by rotating the adjusting stud 14, thereby changing the relative distance between the hexagonal adjustment plate 13 and the hexagonal lifting plate 11, and then changing the elastic force of the clamping spring 12. The elastic force of the clamping 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 clamping spring 12, the elastic force of the clamping 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.

[0023] like Figure 2 , Figure 3 and Figure 5As shown, the baffle comprises an arc-shaped baffle plate 26, an annular regulating chamber 17 is provided inside the valve housing 1 above the sealing ring 18, side ports 20 are provided on the inner bottom surface of the annular regulating chamber 17 near the edges on both sides, first mounting grooves 21 are provided on the inner walls of one side of the two side ports 20 near the bottom edges, 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, 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, one side outer surfaces of the plurality of torque shafts 22 extend 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 ports 20, the other side outer surface of the torque shaft 22 located in the second mounting groove 37 extends to the interior of the annular regulating chamber 17, the torque shaft 22 located in the first mounting groove 21 A lever 24 is fixed to the outer surface of one side of the shaft 22, and one end of the lever 24 extends to 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 mounting groove 21, and the seesaw 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, and the contact plate 25 extends obliquely toward the inside 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 edges on both sides, and the bottoms of the two connecting rods 35 extend to fit with the top of the seesaw 23 accordingly.

[0024] 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 element is prevented from being triggered to work 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 for a large distance, the bottom of the valve core 19 contacts one end of the lever 24, and the lever 24 is pressed downward, so that The torque shaft 22 is driven to rotate. When the torque shaft 22 rotates, the seesaw 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 baffle plate 26 on the torque shaft 22 will flip toward the inner flow channel 5, thereby playing a role in flow blocking. When the flow rate inside the inner flow channel 5 is small, the valve core 19 moves upward. At this time, the arc-shaped baffle plate 26, the lever 24, the seesaw 23 and the contact plate 25 will be driven to reset under the action of the torque force of the torque shaft 22.

[0025] like Figure 2-7As shown, the heating component includes a heating resistance wire 8, a plurality of ceramic rods 7 are fixed equidistantly 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 to the inner wall of one side of the two adjustment grooves 27, a copper rod 29 is fixed on both sides of the valve core 19, and 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 and fitted 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 is in contact with the copper contact 30, the two copper contacts 30 are electrically connected to the plurality of heating resistance wires 8, and an electrical connection protection device is provided. It includes a sealing plate 32, which is slidably connected to the inside of the adjusting groove 27. One side of the sealing plate 32 is arc-shaped and is sealed and fitted with the outer surface of the rubber sleeve 28. The bottom of the sealing plate 32 is sealed and fitted with the copper contact 30. A reciprocating cavity 31 is opened on the inner top surface of the two adjusting grooves 27. The tops of the two sealing plates 32 are slidably extended to the inside of the reciprocating cavity 31. Guide rods 33 are fixed to the inner top surfaces of the two reciprocating cavities 31. The bottoms of the two guide rods 33 are slidably extended to 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.

[0026] 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 correspondingly wound on the outer surface of the ceramic rod 7, and 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 adjusting 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 guidance of the guide rod 33 makes its sliding more stable.

[0027] 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 adjusting stud 14, the hexagonal adjustment plate 13 is driven to move 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.

[0028] 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 lever 24, pressing one end of the lever 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 baffle plate 26 on the torque shaft 22 will flip toward the inner flow channel 5, thereby playing a role in blocking flow.

[0029] 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. Through the guidance of the guide rod 33, the sliding of the sealing plate 32 is 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 resistor 8 works to heat the valve to prevent the internal liquid from freezing.

[0030] 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 protection scope 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 casing (1), an inner flow channel (5) is provided inside the valve casing (1), both ends of the inner flow channel (5) penetrate to one side of the valve casing (1), a thread groove (10) is provided at the bottom of the valve casing (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 the 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 the edges on both sides; the interiors of the two heating chambers (6) are provided with a heating assembly; the inner walls on 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 comprises a hexagonal adjustment plate (13), the hexagonal adjustment plate (13) being slidably connected between the inner walls of the hexagonal groove (9), a hexagonal lifting plate (11) being arranged between the inner walls of the hexagonal groove (9) near the top edge, a compression spring (12) being fixed between the bottom of the hexagonal lifting plate (11) and the top of the hexagonal adjustment plate (13), an adjustment stud (14) being rotatably connected to the bottom of the hexagonal adjustment plate (13), and an outer surface of the adjustment stud (14) being 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); 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; a scale rod (4) is fixed at the middle of the top of the hexagonal adjustment plate (13); the scale rod (4) is slidably connected to the interior of the sleeve rod (15); 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).

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) and located above the sealing ring (18); side openings (20) are provided on the inner bottom surface of the annular regulating chamber (17) near the edges on both sides; first mounting grooves (21) are provided on the inner walls 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 disposed between the inner walls of the two second mounting grooves (37) and between the inner walls of the plurality of first mounting grooves (21); one side outer surfaces of the plurality of torque shafts (22) extend 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 cavity (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), 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), the seesaw (23) is located inside the side opening (20), and 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 one side outer surface 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); 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); 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; the bottoms of the two connecting rods (35) extend correspondingly to fit with the top of the seesaw (23).

8. The antifreeze and low temperature resistant oil well valve according to claim 1, characterized in that: The heating component comprises a heating resistance wire (8), a plurality of ceramic rods (7) are fixed at equal distances between the inner top surface and the bottom surface 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 is 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 comprises a sealing plate (32), the sealing plate (32) being slidably connected to the inside of the adjustment groove (27), one side of the sealing plate (32) being arc-shaped and sealingly fitted to the outer surface of the rubber sleeve (28), the bottom of the sealing plate (32) being sealingly fitted to the copper contact (30), the inner top surfaces of the two adjustment grooves (27) being provided with a reciprocating cavity (31), and the tops of the two sealing plates (32) being slidably extended to 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 around the outer surface of the guide rod (33).

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