A disc motor driven throttling seal valve

Abstract

The present application relates to the technical fields of throttling seal valve, and discloses a disc type motor driven throttling seal valve, which comprises a valve body, a placing cavity is formed in the valve body, a driving assembly is arranged in the placing cavity, a pipeline inlet and a pipeline outlet for fluid passing are arranged on the valve body; a piston integrated structure comprises a connecting head which is screwed with the driving assembly, and a piston rod which is connected with the connecting head; a sealing element is arranged in the placing cavity and sleeved on the piston, a fluid flow channel is arranged on the sealing element; a connection part of the driving assembly and the piston is located in a sheath, and a predetermined gap exists between the sheath and the placing cavity; the piston rod extends to both ends of the sealing element to form extension elements, and the extension elements abut against the inner wall of the sealing element, and a predetermined gap exists between the middle region of the extension elements and the inner wall of the sealing element; through the piston integrated structure, coaxiality of two sealing surfaces is ensured during assembly, and the throttling seal valve can make fluid small flow delivery to a predetermined position when the throttling seal valve is in a throttling mode.

Description

Technical Field

[0001] This invention relates to the field of throttling sealing valve technology, specifically a disc motor driven throttling sealing valve. Background Technology

[0002] A throttling sealing valve is a type of valve that controls fluid flow by changing the throttling cross-section or throttling length. It also has good sealing performance to prevent fluid leakage. In the process of oil extraction, processing and transportation, throttling sealing valves are widely used to regulate oil and gas flow, reduce medium pressure and maintain the sealing of the system.

[0003] However, existing throttling sealing valves still have some problems. For example, patent CN113623457A discloses a throttling valve, which includes a housing with a first valve chamber, a medium inlet, and a medium outlet; a valve seat disposed in the first valve chamber, and a valve port disposed on the valve seat; a first valve core assembly movably disposed in the first valve chamber, the first valve core assembly being disposed corresponding to the valve port, the first valve core assembly having a second valve chamber; and a second valve core assembly, at least a portion of the second valve core assembly being movably disposed in the second valve chamber, the second valve chamber being provided with an auxiliary flow channel, one end of the auxiliary flow channel communicating with the medium inlet, the other end of the auxiliary flow channel communicating with the medium outlet, and the second valve core assembly being used to adjust the flow area of ​​the auxiliary flow channel.

[0004] This application uses the main valve core as a piston. By pushing the main valve core, the seal on the valve seat can block the discharge end, thereby preventing fluid from flowing out of the discharge end of the valve body and completing the opening and closing of the valve. However, this method still has some problems. During the blocking process, the seal will be squeezed, which can easily damage the seal and cause the sealing valve to fail to seal.

[0005] Therefore, how to avoid damage to the seals and ensure the smooth operation of the throttling sealing valve is a problem that needs to be solved. Summary of the Invention

[0006] This invention provides a disc motor driven throttling sealing valve to solve the above-mentioned problems existing in the prior art.

[0007] A disc motor-driven throttling sealing valve, comprising:

[0008] The valve body has a placement cavity, and a drive assembly is provided in the placement cavity. The valve body has a pipeline inlet and a pipeline outlet for fluid to pass through.

[0009] The piston is a one-piece structure, including a connector screwed to the drive assembly and a piston rod connected to the connector;

[0010] A sealing element is disposed in the placement cavity and sleeved on the piston, and the sealing element has a channel for fluid flow;

[0011] A protective sleeve is fitted onto the output end of the drive assembly, the connection between the drive assembly and the piston is located inside the protective sleeve, and a predetermined gap exists between the protective sleeve and the wall of the placement cavity.

[0012] The piston rod extends from both ends toward the seal to form extensions and abuts against the inner wall of the seal. There is a predetermined gap between the area in the middle of the extension and the inner wall of the seal. The gap is connected to the pipeline outlet through a channel on the seal.

[0013] In a further embodiment, the top of the seal is provided with a concave sealing groove, the bottom of the sheath is provided with a protrusion adapted to the sealing groove, a ring of abutment is provided on the curved surface of the sheath, and a throttle valve spring is provided between the drive assembly and the sheath.

[0014] Two of the extensions are provided with placement grooves, and sealing rings are provided in the placement grooves. The sealing ring on the extension near the connector is the seventh sealing ring, and the other one is the sixth sealing ring.

[0015] One end of the throttle valve spring is mounted on the abutment ring, and the other end is connected to the drive assembly;

[0016] The throttle valve spring is in a compressed state.

[0017] In a further embodiment, the seal is a split structure, which includes a sealing valve seat, a sealing valve seat sleeve, and a sealing valve cover, which together form a movable groove for piston movement.

[0018] The sealing valve seat is located on the piston and has a gourd-shaped through hole inside, through which the piston passes.

[0019] The sealing valve seat sleeve is fitted onto the sealing valve seat, wherein the end of the sealing valve seat sleeve away from the connector extends toward the valve body, so that a fluid flow channel is formed between the inner wall of the sealing valve seat sleeve and the outer wall of the sealing valve seat, and a predetermined distance exists between the outer wall of the sealing valve seat sleeve and the valve body.

[0020] The sealing valve seat sleeve and the sealing valve seat are respectively provided with connecting holes in the circumferential direction.

[0021] In a further embodiment, the drive assembly includes a retainer disposed in the placement cavity, an actuating rod passing through the retainer and movably connected to the retainer, and an actuating part screwed to the actuating rod;

[0022] The actuator rod is fitted with a second sealing ring and a third sealing ring, and a retainer sealing ring is provided between the retainer and the valve body;

[0023] One end of the actuator is provided with an external thread, and the other end is provided with an internal thread hole;

[0024] The connector is screwed into the internal threaded hole on the actuator rod.

[0025] In a further embodiment, the actuator includes a disc motor mounted on the valve body by fixing screws, a drive gear located at the output end of the disc motor, a gear ring meshing with the drive gear, a ball bearing located between the toothless surface of the gear ring and the retainer, an actuator frame abutting against the inner ring of the ball bearing and fixed to the gear ring by mounting screws, and a nut located on the actuator frame.

[0026] The inner ring of the ball bearing abuts against the toothless surface of the gear ring, and the outer ring of the ball bearing abuts against the inner wall of the retainer.

[0027] One end of the actuator is screwed to the nut.

[0028] In a further embodiment, a sealing valve sealing ring is provided between the sealing valve seat and the sealing valve seat sleeve, a fourth sealing ring is provided between the sealing valve seat sleeve and the valve body, and a fifth sealing ring is provided between the sealing valve cover and the valve body.

[0029] In a further embodiment, the disc motor driven throttling sealing valve further includes an auxiliary component; the auxiliary component includes a cover disposed on the valve body for enclosing the disc motor, and a first sealing ring is provided between the cover and the valve body;

[0030] The actuator is located in a cavity formed by the orifice cover, valve body and retainer, the cavity is filled with hydraulic oil, and the actuator is immersed in the hydraulic oil.

[0031] In a further embodiment, the valve body is provided with a compensation channel and a safety channel that are horizontal to the axis of the actuator and communicate with the receiving cavity, as well as a compensation sealing valve piston disposed in the compensation channel and a safety valve disposed in the safety channel;

[0032] The inner wall of the compensation channel is provided with a limiting clamp, and a retaining ring is provided inside the limiting clamp;

[0033] The compensating sealing valve piston includes a compensating piston and a compensating sealing ring disposed between the compensating piston body and the compensating channel.

[0034] The safety valve includes a safety valve seat located within the safety passage, and a safety sealing ring fitted between the safety valve seat and the safety passage.

[0035] In a further embodiment, the valve body is further provided with an oil injection channel, a pressure bearing channel, and a wire passage communicating with the receiving cavity;

[0036] One end of the wire passage is connected to the side of the pressure-bearing passage;

[0037] The oil injection channel is provided with an oil injection plug and an oil injection sealing ring sleeved on the oil injection plug and abutting against the inner wall of the oil injection channel.

[0038] In a further embodiment, the pressure-bearing channel is provided with an 8-core pressure-bearing connector and a pressure-bearing sealing ring disposed between the 8-core pressure-bearing connector and the pressure-bearing channel, and the 8-core pressure-bearing connector is electrically connected to the disc motor.

[0039] The wire passage and the pressure-bearing passage are located on both sides of the 8-core pressure-bearing connector;

[0040] The pressure-bearing channel is provided with a wire passage plug at one end near the connection between the wire passage and the pressure-bearing channel, and a wire passage sealing ring is fitted on the wire passage plug.

[0041] Beneficial Effects: This invention discloses a disc-type motor-driven throttling sealing valve. To avoid damage to the seal and ensure smooth valve body transportation, this device incorporates an integrated piston with two extensions. The area between the two extensions forms a slide valve structure. Two sealing rings are fitted onto the extensions. During opening or closing, the actuator moves the actuator rod, which in turn moves the piston along its axis, thus adjusting the position of the slide valve within the seal. When one end of the slide valve is above the seal and the sheath is away from the seal, fluid can enter the seal through the slide valve and flow into the pipeline outlet through the through-hole in the seal, allowing fluid to flow within the throttling valve. When shut-off is required... During operation, the compressed spring and actuator work together to enclose the slide valve with the seal, and the sleeve abuts against the seal. This cuts off the fluid flow, achieving throttling. By designing the piston as a single unit, coaxiality of the two sealing surfaces is ensured during assembly. This also reduces the number of machining steps on the piston, lowering the machining difficulty. Furthermore, the mechanical mechanism replaces the hydraulic structure of a solenoid valve controlling a hydraulic valve, resulting in a simpler principle and easier operation. This device is also used in formation testing instruments, simplifying the system principle and reducing manufacturing costs while shortening the instrument length. The seal, body material, and the Hall element and coil of the motor are all made of high-temperature, high-pressure materials, allowing this invention to be applied in high-temperature, high-pressure environments downhole. Attached Figure Description

[0042] Figure 1This is a cross-sectional view of a disc motor driven throttling sealing valve according to the present invention;

[0043] Figure 2 This is a schematic diagram of a disc-type motor-driven throttling sealing valve according to the present invention;

[0044] Figure 3 This is a schematic diagram of the valve body structure of the present invention;

[0045] Figure 4 This is a cross-sectional view of the actuator of the present invention;

[0046] Figure 5 This is a schematic diagram of the internal structure of a disc motor driven throttling sealing valve according to the present invention;

[0047] Figure 6 This is a schematic diagram of the compensation piston structure of the present invention;

[0048] Figure 7 This is a schematic diagram of the safety valve structure of the present invention;

[0049] Figure 8 This is a schematic diagram of the oil filling plug structure of the present invention.

[0050] Reference numerals: 1. Hole cover; 2. Disc motor; 3. First sealing ring; 4. Gear ring; 5. Ball bearing; 6. Mounting screw; 7. Actuator; 8. Actuator rod; 9. Second sealing ring; 10. Third sealing ring; 11. Fourth sealing ring; 12. Sealing valve seat sleeve; 13. Fifth sealing ring; 14. Sealing valve cover; 15. Piston; 16. Sixth sealing ring; 17. Seventh sealing ring; 18. Sealing valve seat; 19. Sealing valve 20. Sealing ring; 21. Sheath; 22. Throttling valve spring; 23. Fixing ring; 24. Fixing screw; 25. Retaining ring; 26. Compensating piston; 27. Compensating sealing ring; 28. Pressure bearing sealing ring; 29. ​​8-core pressure bearing connector; 30. Cable hole sealing ring; 31. Cable hole plug; 32. Safety valve; 33. Oil filling plug; 34. Oil filling sealing ring; 35. Nut; 36. Valve body; 37. Connector. Detailed Implementation

[0051] Based on the applicant's research and analysis, the existing throttling sealing valves, during sealing, exert pressure on the sealing element, which can easily damage the sealing element and thus lead to sealing valve failure. To address the problems existing in the prior art, please refer to... Figures 1-8In this device, an integrated piston 15 is provided, with two extensions on the piston 15. The area between the two extensions forms a slide valve structure. Two sealing rings are then fitted onto the extensions. During opening or closing, the actuator moves the actuator rod 8, which in turn moves the piston 15 along its axial direction, thereby adjusting the position of the slide valve within the sealing element. When one end of the slide valve is above the sealing element and the sheath 20 is away from the sealing element, fluid can enter the sealing element through the slide valve and exit through the sealing element. The through-hole on the component flows into the pipeline outlet, allowing fluid to flow in the throttle valve. When a shut-off operation is required, the compression spring and the actuator work together to allow the seal to wrap around the slide valve and the sleeve 20 to abut against the seal. At this time, the fluid is cut off, completing the throttling operation. Meanwhile, by setting the piston 15 as an integral structure, the coaxiality of the two sealing surfaces can be ensured during assembly, reducing the compression between the piston and the seal during movement. At the same time, the number of machining steps for the piston 15 is reduced, lowering the machining difficulty of the piston 15.

[0052] This device includes a valve body 36 with a placement cavity, within which a drive assembly is housed. The valve body 36 has a pipeline inlet and outlet for fluid passage. A piston 15, an integral structure, includes a connector 37 screwed to the drive assembly and a piston rod connected to the connector 37. A seal is disposed within the placement cavity and fitted onto the piston 15, with a channel for fluid flow. A sleeve 20 is fitted onto the output end of the drive assembly, with the connection between the drive assembly and the piston 15 located within the sleeve 20. A predetermined gap exists between the sleeve 20 and the wall of the placement cavity. Both ends of the piston rod extend towards the seal to form extensions that abut against the inner wall of the seal. A predetermined gap exists between the area in the middle of the extensions and the inner wall of the seal, and this gap communicates with the pipeline outlet through a channel on the seal. When fluid needs to pass through the throttling sealing valve, the drive assembly activates, moving the screwed connector 37 within the placement cavity. The head 37 can drive the piston rod to move. When the top of the extension near the sheath 20 abuts against the inner wall of the sheath 20, the movement of the drive assembly causes the bottom of the extension to be above the seal and the sheath 20 to move away from the seal. Fluid flows from the pipeline inlet in the valve body 36 into the placement chamber, then flows between the sheath 20 and the seal into the space between the two extensions, and flows out from the pipeline outlet through the channel on the seal. When it is necessary to stop the fluid, the drive assembly can drive the connecting head 37 to move in the opposite direction. When fluid passes through the throttling sealing valve, the compression deformation of the throttling valve spring 21 increases. Therefore, when the connector 37 moves in the opposite direction, with the cooperation of the throttling valve spring 21, the protrusion can be positioned in the sealing groove on the seal. At the same time, with the operation of the drive assembly, the extension can be positioned in the seal, blocking the fluid from entering the middle area between the two extensions, thereby completing the fluid interception. By controlling the gap between the sheath 20 and the seal and the distance between the extension and the top of the seal, the flow rate and flow volume of the fluid can be controlled.

[0053] The top of the seal has a concave sealing groove, and the bottom of the sleeve 20 has a protrusion that matches the sealing groove. A contact ring is provided on the curved surface of the sleeve 20. A throttle valve spring 21 is provided between the drive assembly and the sleeve 20. Two extensions each have a placement groove containing a sealing ring. The sealing ring on the extension near the connector 37 is the seventh sealing ring 17, and the other is the sixth sealing ring 16. One end of the throttle valve spring 21 is located on the contact ring, and the other end is connected to the drive assembly. The throttle valve spring 21 is in a compressed state. In the non-working state, the throttle valve spring 21 is compressed. To return to its original shape, the compressed spring applies a spring force to the sleeve 20 along the direction from the connector 37 to the piston 15, causing the protrusion on the sleeve 20 to be positioned within the concave sealing groove on the seal. The sealing groove applies a certain pressure to the sealing element, which can initially cut off the fluid and reduce the fluid entering the area between the two extensions. The seventh sealing ring 17, which is set on the top extension of the piston 15, can act as a switch to cut off the fluid and reduce the fluid entering the sealing element. The sixth sealing ring 16, which cooperates with the sealing element, can prevent the fluid outside the valve body 36 from entering the valve body 36 from the bottom of the sealing element. First, it can control the flow rate of the fluid in the valve body 36, and second, it can ensure the flow direction of the fluid. Only the pre-treated fluid can flow out from the pipeline inlet, while the untreated fluid cannot enter the valve body 36. The throttling sealing valve in this device is a cartridge combination valve design, and each component can be replaced, which is convenient for maintenance and reduces costs.

[0054] The sealing element is a split structure, comprising a sealing valve seat 18, a sealing valve seat sleeve 12, and a sealing valve cover 14, which together form a movable groove for the movement of a piston 15. The sealing valve seat 18 is disposed on the piston 15 and has a gourd-shaped through hole through which the piston 15 passes. The sealing valve seat sleeve 12 is fitted onto the sealing valve seat 18, with one end of the sleeve away from the connector 37 extending towards the valve body 36, forming a fluid flow channel between the inner wall of the sleeve 12 and the outer wall of the sealing valve seat 18. A predetermined distance exists between the outer wall of the sleeve 12 and the valve body 36. The sealing valve seat sleeve 12 and the sealing valve seat 18 are respectively provided with connecting holes on their circumference. The top of the sealing valve seat 18... The plane is far from the connector 37 relative to the plane where the sealing valve seat sleeve 12 is located. The top of the sealing valve seat sleeve 12 is provided with an inverted frustum-shaped groove. The top of the inverted frustum-shaped groove is on the same plane as the top of the sealing valve seat 18 and forms an inwardly concave sealing groove. The bottom of the sheath 20 is located in the inwardly concave sealing groove. When fluid needs to flow in the throttling sealing valve, the piston 15 can be moved by the drive assembly, so that the bottom of the extension with the seventh sealing ring 17 is located on the top of the sealing valve seat 18, so that the fluid can enter between the piston rod and the sealing valve seat 18 through the gap between the two. Since both the sealing valve seat 18 and the sealing valve seat sleeve 12 are provided with through holes, the fluid can pass through the sealing valve seat 18 and the sealing valve seat sleeve 12 in sequence and be discharged from the pipeline outlet to the valve body 36.

[0055] The drive assembly includes a retainer 23 disposed in the placement cavity, an actuator 8 passing through and movably connected to the retainer 23, and an actuator part screwed to the actuator 8; wherein, a second sealing ring 9 and a third sealing ring 10 are sleeved on the actuator 8, and a retainer sealing ring 22 is provided between the retainer 23 and the valve body 36; wherein one end of the actuator 8 has an external thread and the other end has an internal thread hole; a connector 37 is screwed to the internal thread hole on the actuator 8; the actuator part includes a disc motor 2 mounted on the valve body 36 by fixing screws 24, a drive gear disposed at the output end of the disc motor 2, a gear ring 4 meshing with the drive gear, a ball bearing 5 located between the toothless surface of the gear ring 4 and the retainer 23, an actuator frame 7 abutting against the inner ring of the ball bearing 5 and fixed to the gear ring 4 by mounting screws 6, and an actuator frame 7 disposed on the actuator frame 7. Nut 35; the inner ring of ball bearing 5 abuts against the toothless surface of gear ring 4, and the outer ring of ball bearing 5 abuts against the inner wall of retainer 23; one end of actuator 8 is screwed to nut 35; in order to dissipate heat from disc motor 2, disc motor 2, drive assembly and retainer are immersed in hydraulic oil. The second sealing ring 9 and the third sealing ring 10 can separate the fluid and hydraulic oil to prevent them from mixing. Since this device is generally used in oil wells, and the oil in oil wells has a large pressure, in order to avoid damage to the device, an annular plate is provided on actuator 8, and a limiting groove is provided on retainer 23. When the annular plate abuts against the bottom of the limiting groove or the annular plate abuts against actuator 7, actuator 8 reaches its maximum stroke, which limits the position of actuator 8 and ensures the smooth operation of the throttling sealing valve. At this time, the valve is in the fully open state.

[0056] In a further embodiment, when the drive assembly is working, the disc motor 2 starts to work. The moving disc motor 2 can drive the drive gear to rotate. Since the drive gear meshes with the toothed surface of the gear ring 4, when the drive gear rotates, it can cause the gear ring 4 to rotate. The actuator 7 is fixed on the gear ring 4 by the mounting screw 6. The actuator 7 can rotate with the gear ring 4. The nut 35 is set on the actuator 7. When the actuator 7 starts to rotate, it causes the actuator rod 8 to reciprocate in its axial direction according to the rotation direction of the actuator 7, thereby adjusting the position of the piston 15 and controlling the fluid to move in the valve body 36.

[0057] In a further embodiment, the disc motor 2 is a 50V DC brushless stepper motor with a permanent magnet rotor, stepping in 10-degree increments. An actuator provides fine control over the movement of the piston 15, while a Hall effect sensor mounted on the disc motor 2 determines the position of the piston 15. When this device is used in oil well logging instruments, the surface system can display the throttle valve position scale from 0 (fully closed) to 140 (fully open). The throttle valve opens after approximately 90 counts; the amount of movement of the piston 15 is calculated as follows:

[0058] The ratio of the number of gears corresponding to the drive gear shaft at the output end of the disc motor 2 and the gear ring 4 in the actuator is 1:4; the thread pitch of the nut 35 and the actuator rod 8 is 16 threads per inch, i.e., 25.4 * 1 / 16 = 1.5875 mm; when the drive gear shaft of the disc motor 2 rotates 1 revolution, the gear ring 4 rotates 1 / 4 revolution, that is, the nut 35 and the actuator rod 8 both rotate 1 / 4 revolution, then the actuator rod 8 drives the piston 15 to move by 1.5875 * 1 / 4 ≈ 0.4 mm, that is, when the disc motor 2 rotates one revolution, the piston 15 moves up / down 0.4 mm. With the help of the Hall effect sensor, the number of revolutions of the disc motor 2 can be detected, and the vertical movement of the piston 15 can be calculated. Based on the vertical movement of the piston 15, the positional relationship between the seventh sealing ring 17 and the sealing element is adjusted, thereby controlling the flow rate of fluid through the throttling sealing valve.

[0059] In a further embodiment, the throttling sealing valve is driven by a 50V DC brushless stepper motor, i.e., a disc motor 2, which is controlled by a ground system and can operate in either sealing or throttling mode. The choice between sealing and throttling modes depends primarily on the movement distance of the piston 15 within the sealing valve seat 18. In throttling mode, fluid flow can be restricted without complete closure. When the piston 15 moves up and down within the sealing valve seat 18 to its maximum position, the throttling sealing valve will fully open or close. When the piston 15 moves towards the actuator rod 8 to its maximum position, the throttling sealing valve is fully open, and the piston 15 is at its maximum displacement distance. Conversely, when the piston 15 moves away from the actuator rod 8 to its maximum position, the throttling sealing valve is fully closed, and the piston 15 is at its minimum displacement distance. When the piston 15 is between the minimum and maximum displacement distances, the throttling sealing valve is in throttling mode.

[0060] A sealing valve sealing ring 19 is provided between the sealing valve seat 18 and the sealing valve seat sleeve 12, a fourth sealing ring 11 is provided between the sealing valve seat sleeve 12 and the valve body 36, and a fifth sealing ring 13 is provided between the sealing valve cover 14 and the valve body 36. The sealing element can also be set as an integral structure, thereby reducing the use of sealing rings.

[0061] The auxiliary component includes a cover 1 disposed on the valve body 36 for enclosing the disc motor 2, and a first sealing ring 3 is provided between the cover 1 and the valve body 36; the actuator is located in a receiving cavity formed by the cover 1, the valve body 36 and the retainer 23, the receiving cavity is filled with hydraulic oil, and the actuator is immersed in the hydraulic oil; during the process of driving the throttle sealing valve, the disc motor 2 needs to rotate, and the disc motor 2 will generate heat during the rotation process. Therefore, by immersing it in hydraulic oil, the motor temperature can be reduced, ensuring the normal operation of the disc motor 2.

[0062] The valve body 36 has a compensation channel and a safety channel that are horizontal to the axis of the actuator 8 and communicate with the receiving cavity, and a compensation sealing valve piston disposed in the compensation channel and a safety valve 32 disposed in the safety channel; the inner wall of the compensation channel is provided with a limiting clamp, and a retaining ring 25 is disposed in the limiting clamp; the compensation sealing valve piston includes a compensation piston 26 and a compensation sealing ring 27 disposed between the body of the compensation piston 26 and the compensation channel; the safety valve 32 includes a safety valve seat located in the safety channel and a safety valve seat sleeved on the... The safety seal between the safety valve seat and the safety channel; since this device is used in downhole oil production, the liquid outside the valve body 36 will apply a certain hydrostatic pressure to the compensation piston 26, which will cause the compensation piston 26 to move away from the retaining ring 25 and move in the compensation channel, thus playing a role in compensating the pressure of the hydraulic oil; during the oil injection process, the safety valve 32 can be set so that when the hydraulic oil in the receiving cavity puts too much pressure on the disc motor 2, the safety valve 32 can be opened to discharge the hydraulic oil to the outside of the instrument (wellbore), preventing the hydraulic oil tank from being over-pressurized and damaging the disc motor 2.

[0063] The valve body 36 is further provided with an oil injection channel, a pressure bearing channel, and a wire passage communicating with the receiving cavity; one end of the wire passage is connected to the side of the pressure bearing channel; the oil injection channel is provided with an oil injection plug 33 and an oil injection sealing ring 34 sleeved on the oil injection plug 33 and abutting against the inner wall of the oil injection channel; the pressure bearing channel is provided with an 8-core pressure bearing connector 29 and a pressure bearing sealing ring 28 disposed between the 8-core pressure bearing connector 29 and the pressure bearing channel, the 8-core pressure bearing connector 29 being electrically connected to the disc motor 2; the wire passage and the pressure bearing channel are located on both sides of the 8-core pressure bearing connector 29; a wire passage hole plug 31 is provided at one end of the pressure bearing channel near the connection between the wire passage and the pressure bearing channel, and a wire passage hole sealing ring 30 is sleeved on the wire passage hole plug 31; through the provided 8-core pressure bearing connector 29, the pressure bearing channel and the wire passage can be separated, thereby ensuring the normal operation of the circuit.

[0064] Working principle description: Before operation, the operator can remove the oil plug 33 and inject hydraulic oil into the receiving cavity. At this time, the hydraulic oil is located in the receiving cavity, and the compensating piston 26 abuts against the retaining ring 25. When the throttling sealing valve is located in the wellbore, the high-pressure fluid from the outside can push the compensating piston 26 to move in the compensating channel. When the throttling sealing valve needs to be opened, the disc motor 2 starts to work. The moving disc motor 2 can drive the drive gear to rotate. Since the drive gear and the gear ring 4 have tooth surface meshing, when the drive gear rotates, it can cause the gear ring 4 to rotate. The actuator 7 is fixed to the gear ring 4 by mounting screws 6. The actuator 7 can rotate with the gear ring 4. The nut 35 is set on the actuator 7. When the actuator 7 starts to rotate, it causes the actuator rod 8 to reciprocate in its axial direction according to the rotation direction of the actuator 7. When the actuator rod 8 starts to move, the moving actuator rod 8 can drive the screwed connector 37 to move in the placement cavity. The moving connector 37 can drive the piston rod to move. When the top of the extension near the sheath 20 abuts against the inner wall of the sheath 20, it moves with the drive assembly. The movement causes the bottom of the extension to be positioned above the seal and the sleeve 20 to move away from the seal. Fluid flows from the pipeline inlet in the valve body 36 into the placement chamber, then flows between the sleeve 20 and the seal into the space between the two extensions, and flows out from the pipeline outlet through the channel on the seal. When fluid needs to be stopped, the drive assembly can drive the connector 37 to move in the opposite direction. Because the compression deformation of the throttle valve spring 21 increases when the fluid passes through the throttle sealing valve, when the connector 37 moves in the opposite direction, with the cooperation of the throttle valve spring 21, The protrusion can be positioned in the sealing groove on the seal, and under the operation of the drive assembly, the extension can be positioned in the seal, blocking the fluid from entering the middle area between the two extensions, thereby completing the fluid interception. By controlling the gap between the sleeve 20 and the seal and the distance between the extension and the top of the seal, the flow rate and flow volume of the fluid can be controlled. When the fluid flows between the two extensions, the fluid can flow through the through holes on the sealing valve seat 18 and the sealing valve seat sleeve 12 to the pipeline outlet, thereby completing the discharge or collection of the fluid.

[0065] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A disc motor driven throttling seal valve characterized by, The utility model relates to a valve body (36) is provided with a placing cavity, and the placing cavity is provided with a driving assembly, and the valve body (36) is provided with pipeline inlet and pipeline outlet for fluid passing; The piston (15) is an integrated structure, comprising a connecting head (37) screwed with the driving assembly, and a piston rod connected with the connecting head (37); A sealing element is arranged in the placing cavity and sleeved on the piston (15), and the sealing element is provided with a channel for fluid flow; A sheath (20) is sleeved on the output end of the driving assembly, and the connecting position between the driving assembly and the piston (15) is located in the sheath (20), and a predetermined gap exists between the sheath (20) and the cavity wall of the placing cavity; The piston rod extends to the sealing element at both ends to form extension pieces and abuts against the inner wall of the sealing element, and a predetermined gap exists between the middle region of the extension piece and the inner wall of the sealing element, which is communicated with the pipeline outlet through the channel on the sealing element. The top of the sealing element is provided with an inner concave sealing groove, the bottom of the sheath (20) is provided with a protruding element matched with the sealing groove, a curved surface of the sheath (20) is provided with an abutting ring, and a throttle spring (21) is arranged between the driving assembly and the sheath (20); 2. A throttling seal valve driven by a disc motor according to claim 1, characterized in that: Two extension pieces are respectively provided with placing grooves, and the placing grooves are provided with sealing rings, wherein the sealing ring on the extension piece close to the connecting head (37) is a seventh sealing ring (17), and the other is a sixth sealing ring (16); One end of the throttle spring (21) is arranged on the abutting ring, and the other end is connected with the driving assembly; The throttle spring (21) is in a compressed state. The sealing element is a split structure, comprising a sealing valve seat (18), a sealing valve seat sleeve (12) and a sealing valve cover (14), which form an active groove for the movement of the piston (15) among them; 3. A disc motor driven throttling seal valve according to claim 2, characterised in that: The sealing valve seat (18) is arranged on the piston (15), and a gourd-shaped through hole is arranged in the sealing valve seat (18), and the piston (15) penetrates through the through hole; The sealing valve seat sleeve (12) is sleeved on the sealing valve seat (18), wherein one end of the sealing valve seat sleeve (12) away from the connecting head (37) extends towards the valve body (36), so that a channel for fluid flow is formed between the inner wall of the sealing valve seat sleeve (12) and the outer wall of the sealing valve seat (18), and a predetermined distance exists between the outer wall of the sealing valve seat sleeve (12) and the valve body (36); The sealing valve seat sleeve (12) and the sealing valve seat (18) are respectively provided with communication holes in the circumferential direction. The driving assembly comprises a fixer (23) arranged in the placing cavity, an execution rod (8) penetrating through the fixer (23) and movably connected with the fixer (23), and an execution part screwed with the execution rod (8); 4. A disc motor driven throttling seal valve according to claim 3, characterised in that: The execution rod (8) is sleeved with a second sealing ring (9) and a third sealing ring (10), and a fixer sealing ring (22) is arranged between the fixer (23) and the valve body (36); One end of the execution rod (8) is provided with an external thread, and the other end is provided with an internal thread hole; The connecting head (37) is screwed with the internal thread hole on the execution rod (8). ​ 5. A disc motor driven throttling seal valve according to claim 4, characterised in that: The execution part includes a disc motor (2) mounted on the valve body (36) through a fixing screw (24), a drive gear arranged at the output end of the disc motor (2), a gear ring (4) engaged with the drive gear, a ball bearing (5) located between the gear ring (4) and the fixator (23), an execution frame (7) abutting against the inner ring of the ball bearing (5) and fixed on the gear ring (4) through a mounting screw (6), and a nut (35) arranged on the execution frame (7); The inner ring of the ball bearing (5) abuts against the toothless surface of the gear ring (4), and the outer ring of the ball bearing (5) abuts against the inner wall of the fixator (23); One end of the execution rod (8) is screwed with the nut (35).

6. A disc motor driven throttling seal valve according to claim 5, characterised in that: A sealing valve sealing ring (19) is arranged between the sealing valve seat (18) and the sealing valve seat sleeve (12), a fourth sealing ring (11) is arranged between the sealing valve seat sleeve (12) and the valve body (36), and a fifth sealing ring (13) is arranged between the sealing valve cover (14) and the valve body (36).

7. A disc motor driven throttling seal valve according to claim 6, characterised in that: The auxiliary assembly further includes a hole cover (1) arranged on the valve body (36) to wrap the disc motor (2), and a first sealing ring (3) arranged between the hole cover (1) and the valve body (36). The execution part is located in a containing cavity surrounded by the hole cover (1), the valve body (36) and the fixator (23), the containing cavity is filled with hydraulic oil, and the execution part is soaked in the hydraulic oil. A compensation channel and a safety channel are arranged on the valve body (36) and communicate with the containing cavity, a compensation sealing valve piston is arranged in the compensation channel, and a safety valve (32) is arranged in the safety channel; 8. A disc motor driven throttling seal valve according to claim 7, characterised in that: Two limiting clamping plates are arranged on the inner wall of the compensation channel, and a retainer ring (25) is arranged between the limiting clamping plates; The compensation sealing valve piston includes a compensation piston (26) and a compensation sealing ring (27) arranged between the compensation piston (26) and the compensation channel; The safety valve (32) includes a safety valve seat arranged in the safety channel, and a safety sealing ring arranged between the safety valve seat and the safety channel. An oil injection channel, a pressure bearing channel and a wire passing channel are further arranged in the valve body (36) and communicate with the containing cavity; 9. A disc motor driven throttling seal valve according to claim 8, characterised in that: One end of the wire passing channel communicates with the side surface of the pressure bearing channel; An oil injection plug (33) is arranged in the oil injection channel, and an oil injection sealing ring (34) is arranged on the oil injection plug (33) and abuts against the inner wall of the oil injection channel. An 8-core pressure bearing connector (29) is arranged in the pressure bearing channel, a pressure bearing sealing ring (28) is arranged between the 8-core pressure bearing connector (29) and the pressure bearing channel, and the 8-core pressure bearing connector (29) is electrically connected with the disc motor (2); 10. A disc motor driven throttling seal valve according to claim 9, characterized in that: The wire passing channel and the pressure bearing channel are located on both sides of the 8-core pressure bearing connector (29); A wire hole plug (31) is arranged at one end of the pressure bearing channel close to the connection between the wire passing channel and the pressure bearing channel, and a wire hole sealing ring (30) is arranged on the wire hole plug (31). ​

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