Throttling sealing valve driven by disc type motor

Abstract

The invention relates to the technical field of throttling sealing valves, and discloses a disc type motor driven throttling sealing valve which comprises a valve body, a containing cavity is formed in the valve body, a driving assembly is arranged in the containing cavity, and a pipeline inlet and a pipeline outlet for fluid to pass through are formed in the valve body; the piston integrated structure comprises a connector in threaded connection with the driving assembly and a piston rod connected with the connector. The sealing piece is arranged in the containing cavity and arranged on the piston in a sleeving mode, and a fluid flowing channel is formed in the sealing piece. The joint of the driving assembly and the piston is located in the protective sleeve, and a preset gap exists between the protective sleeve and the containing cavity. The two ends of the piston rod extend towards the sealing piece to form extending pieces and abut against the inner wall of the sealing piece, and a preset gap exists between the area located in the middle of the extending pieces and the inner wall of the sealing piece. Through the integrated structure of the piston, the coaxiality of the two sealing surfaces is guaranteed during assembly, and meanwhile, when the throttling sealing valve is in a throttling mode, fluid can be conveyed to a set position in a small flow mode.

Description

Technical Field

[0001] The invention relates to the technical field of throttling sealing valves, in particular to a throttling sealing valve driven by a disc motor. Background Art

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

[0003] However, there are still some problems with the existing throttling sealing valves. For example, the existing patent with publication number CN113623457A discloses a throttling valve, which includes a shell, having a first valve cavity, a medium inlet and a medium outlet; a valve seat, which is arranged in the first valve cavity, and a valve port is arranged on the valve seat; a first valve core assembly, which is movably arranged in the first valve cavity, the first valve core assembly is arranged corresponding to the valve port, and the first valve core assembly has a second valve cavity; a second valve core assembly, at least a part of the second valve core assembly is movably arranged in the second valve cavity, and an auxiliary flow channel is arranged in the second valve cavity, one end of the auxiliary flow channel is connected to the medium inlet, and the other end of the auxiliary flow channel is connected to the medium outlet, and the second valve core assembly is used to adjust the flow area of ​​the auxiliary flow channel.

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

[0005] Therefore, how to avoid damage to the seal and ensure the smooth transportation of the throttling sealing valve is a problem to be solved at present. Summary of the invention

[0006] The present invention provides a throttling sealing valve driven by a disc motor to solve the above problems existing in the prior art.

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

[0008] A valve body, on which a placement cavity is provided, in which a driving assembly is provided, and on which a pipeline inlet and a pipeline outlet for fluid to pass are provided;

[0009] The piston is an integrated structure, comprising a connector threadedly connected to the drive assembly, and a piston rod connected to the connector;

[0010] A sealing member, arranged in the placement cavity and sleeved on the piston, wherein the sealing member is provided with a channel for fluid flow;

[0011] A sheath is sleeved on the output end of the driving assembly, wherein the connection between the driving assembly and the piston is located in the sheath, and there is a predetermined gap between the sheath and the wall of the placement chamber;

[0012] Both ends of the piston rod extend toward the seal to form extensions and abut against the inner wall of the seal. A predetermined gap exists 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 sealing member is provided with an inwardly concave sealing groove, the bottom of the sleeve is provided with a protrusion adapted to the sealing groove, a circle of abutment ring is provided on the curved surface of the sleeve, and a throttle valve spring is provided between the drive assembly and the sleeve;

[0014] Two of the extension pieces are provided with placement grooves respectively, and sealing rings are provided in the placement grooves. The sealing ring on the extension piece close to 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 arranged on the abutment ring, and the other end is connected to the driving assembly;

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

[0017] In a further embodiment, the sealing member is a split structure, which includes a sealing valve seat, a sealing valve seat sleeve and a sealing valve cover, and a movable groove for the piston to move is formed between the three;

[0018] The sealing valve seat is arranged on the piston, and a gourd-shaped through hole is arranged therein, and the piston passes through the through hole;

[0019] The sealing valve seat sleeve is sleeved on 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 communicating holes in the circumferential direction.

[0021] In a further embodiment, the driving assembly includes a fixture disposed in the placement cavity, an actuator rod penetrating the fixture and movably connected to the fixture, and an actuator portion threadedly connected to the actuator rod;

[0022] Wherein, a second sealing ring and a third sealing ring are sleeved on the actuating rod, and a retainer sealing ring is provided between the retainer and the valve body;

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

[0024] The connecting head is screwed to the internal threaded hole on the actuator rod.

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

[0026] The inner ring of the ball bearing abuts against the non-toothed 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 actuating rod is threadedly connected 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 throttling sealing valve driven by a disc motor further comprises an auxiliary component; the auxiliary component comprises a hole cover arranged on the valve body for wrapping the disc motor, and a first sealing ring is arranged between the hole cover and the valve body;

[0030] The actuator is located in a receiving cavity surrounded by the hole cover, the valve body and the fixer. The receiving 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 which are parallel to the axis direction of the actuator rod and communicated with the accommodating chamber, as well as a compensation sealing valve piston arranged in the compensation channel and a safety valve arranged in the safety channel;

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

[0033] The compensation sealing valve piston comprises a compensation piston and a compensation sealing ring arranged between the compensation piston body and the compensation channel;

[0034] The safety valve comprises a safety valve seat located in the safety passage, and a safety sealing ring sleeved 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-passing channel which are in communication with the accommodating chamber;

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

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

[0038] In a further embodiment, an 8-core pressure-bearing joint is provided in the pressure-bearing channel, and a pressure-bearing sealing ring is provided between the 8-core pressure-bearing joint and the pressure-bearing channel, and the 8-core pressure-bearing joint is electrically connected to the disc motor;

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

[0040] A wire-passing hole plug is provided 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-passing hole sealing ring is sleeved on the wire-passing hole plug.

[0041] Beneficial effect: The present invention discloses a throttling sealing valve driven by a disc motor. In order to avoid damage to the sealing member and ensure smooth transportation of the valve body, an integrated piston is provided in the device, and two extension members are provided on the piston. The area between the two extension members forms a sliding valve structure, and then two sealing rings are sleeved on the extension members. During the opening or closing process, the actuator rod can be driven to move through the work of the actuator, and the moving actuator rod can drive the piston to move in the axial direction thereof, so as to adjust the position of the sliding valve in the sealing member. When one end of the sliding valve is located above the sealing member and the sheath is away from the sealing member, the fluid can enter the sealing member along the sliding valve and flow into the pipeline outlet from the through hole on the sealing member, so that the fluid can flow in the throttle valve; when it is necessary to stop the flow, the fluid can flow in the throttle valve. When working, with the cooperation of the compressed spring and the actuator, the seal can wrap the sliding valve and the sleeve abuts against the seal. At this time, the fluid is cut off and the throttling work of the fluid is completed. At the same time, by setting the piston into an integrated structure, the coaxiality of the two sealing surfaces can be guaranteed during assembly. At the same time, during processing, the processing steps of the piston are reduced, and the processing difficulty of the piston is reduced; at the same time, the hydraulic structure of the hydraulic valve controlled by the solenoid valve is replaced by the set mechanical mechanism, which has a simple principle and is easy to operate. At the same time, the device is used in formation testing instruments, which simplifies the system principle, simplifies the mechanical structure, reduces the processing cost, and shortens the instrument length; the seal, the body material, and the Hall element and coil of the motor itself are all made of high-temperature and high-pressure materials. The present invention can be applied to high-temperature and high-pressure environments underground. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0043] Figure 2 It is a schematic structural diagram of a throttling sealing valve driven by a disc motor of the present invention;

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

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

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

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

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

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

[0050] Figure numerals: 1, hole cover; 2, disc motor; 3, first sealing ring; 4, gear ring; 5, ball bearing; 6, mounting screw; 7, actuator frame; 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 Sealing ring; 20. Sheath; 21. Throttle valve spring; 22. Fixer sealing ring; 23. Fixer; 24. Fixing screw; 25. Retaining ring; 26. Compensating piston; 27. Compensating sealing ring; 28. Pressure-bearing sealing ring; 29. ​​8-core pressure-bearing joint; 30. Wire hole sealing ring; 31. Wire hole plug; 32. Safety valve; 33. Oil filling plug; 34. Oil filling sealing ring; 35. Nut; 36. Valve body; 37. Connector. DETAILED DESCRIPTION

[0051] After research and analysis by the applicant, it is found that the throttling sealing valve in the prior art will cause a certain amount of extrusion to the sealing member when sealing, which is easy to cause damage to the sealing member, thus causing the sealing valve to fail to seal. In order to solve the problems existing in the prior art, refer to Figure 1-Figure 8In the present device, an integrated piston 15 is provided, and two extensions are provided on the piston 15. The area between the two extensions forms a slide valve structure, and then two sealing rings are sleeved on the extensions. During the opening or closing process, the actuator 8 can be driven to move through the work of the actuator. The moving actuator 8 can drive the piston 15 to move in the axial direction thereof, thereby adjusting the position of the slide valve in the seal. When one end of the slide valve is located above the seal and the sheath 20 is away from the seal, the fluid can enter the seal along the slide valve and pass through the seal. The through hole on the component flows into the outlet of the pipeline, so that the fluid can flow in the throttle valve; when it is necessary to stop the work, with the cooperation of the compressed spring and the actuator, the seal can wrap the slide valve and the sleeve 20 abuts against the seal. At this time, the fluid is cut off and the throttling work of the fluid is completed. At the same time, by setting the piston 15 as an integrated structure, the coaxiality of the two sealing surfaces can be ensured during assembly, so that the extrusion of the piston on the seal can be reduced during movement. At the same time, during processing, the processing steps of the piston 15 are reduced, and the processing difficulty of the piston 15 is reduced.

[0052] The device includes a valve body 36, on which a placement cavity is provided, in which a drive assembly is provided, and the valve body 36 is provided with a pipeline inlet and a pipeline outlet for fluid to pass through; a piston 15, which is an integrated structure, includes a connector 37 threadedly connected to the drive assembly, and a piston rod connected to the connector 37; a sealing member is arranged in the placement cavity and sleeved on the piston 15, and the sealing member is provided with a channel for fluid flow; a sheath 20, which is sleeved on the output end of the drive assembly, and the connection between the drive assembly and the piston 15 is located in the sheath 20, and there is a predetermined gap between the sheath 20 and the wall of the placement cavity; the two ends of the piston rod extend toward the sealing member to form an extension member and abut against the inner wall of the seal, and there is a predetermined gap between the area located in the middle of the extension member and the inner wall of the seal, and the gap is connected to the pipeline outlet through the channel on the seal; when fluid needs to pass through the throttling sealing valve, the driving member starts to work, and the moving driving member drives the connector 37 threadedly connected to it to move in the placement cavity, and the moving connecting member The head 37 can drive the piston rod to move. When the top of the extension piece close to the sheath 20 abuts against the inner wall of the sheath 20, as the driving assembly moves, the bottom of the extension piece is located above the seal and the sheath 20 is away from the seal. The fluid flows into the placement cavity from the pipeline inlet in the valve body 36, then flows between the two extension pieces along the sheath 20 and the seal, and flows out from the pipeline outlet along the channel on the seal. When the fluid needs to be stopped, the driving assembly can drive the connector 37 to move in the opposite direction. When the fluid passes through the throttle sealing valve, the compression deformation of the throttle spring 21 increases. Therefore, when the connector 37 moves in the opposite direction, with the cooperation of the throttle spring 21, the protrusion can be located in the sealing groove on the seal. At the same time, under the operation of the drive assembly, the extension can be located in the seal to block the fluid from entering the middle area of ​​the two extensions, thereby completing the fluid interception work; 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 amount of the fluid are controlled.

[0053] The top of the sealing member is provided with a concave sealing groove, the bottom of the sleeve 20 is provided with a protrusion adapted to the sealing groove, a circle of abutment ring is provided on the curved surface of the sleeve 20, and a throttle spring 21 is provided between the drive assembly and the sleeve 20; wherein the two extension members are respectively provided with placement grooves, and sealing rings are provided in the placement grooves, wherein the sealing ring on the extension member close to the connector 37 is the seventh sealing ring 17, and the other is the sixth sealing ring 16; wherein one end of the throttle spring 21 is arranged on the abutment ring, and the other end is connected to the drive assembly; the throttle spring 21 is in a compressed state; when not in working state, the throttle spring 21 is in a compressed state, and in order to restore its original state, the compressed spring will exert an elastic force on the sleeve 20 along the direction from the connector 37 to the piston 15, so that the protrusion on the sleeve 20 is located at the concave sealing ring on the seal. In the sealing groove, a certain pressure is applied to the seal, which can perform preliminary cutoff work on the fluid and reduce the fluid entering the area between the two extensions. The seventh sealing ring 17 arranged on the top extension of the piston 15 can play the role of a switch to cut off the fluid and reduce the fluid from entering the seal; the cooperation of the sixth sealing ring 16 and the seal can prevent the fluid outside the valve body 36 from entering the valve body 36 from the bottom of the seal. First, the flow rate of the fluid in the valve body 36 can be controlled, and secondly, the flow direction of the fluid is guaranteed. Only the pre-treated fluid can flow out from the pipeline inlet, and the untreated fluid cannot enter the valve body 36. The throttling sealing valve in this device is a plug-in combination valve design, and each component can be replaced, which is convenient for maintenance and reduces costs.

[0054] The sealing member is a split structure, which includes a sealing valve seat 18, a sealing valve seat sleeve 12 and a sealing valve cover 14, and a movable groove for the movement of the piston 15 is surrounded by the three; wherein the sealing valve seat 18 is arranged on the piston 15, and a gourd-shaped through hole is arranged therein, and the piston 15 passes through the through hole; the sealing valve seat sleeve 12 is sleeved on the sealing valve seat 18, wherein the end of the sealing valve seat sleeve 12 away from the connecting head 37 extends toward the valve body 36, so that a fluid flow channel is formed between the inner wall of the sealing valve seat sleeve 12 and the outer wall of the sealing valve seat 18, and there is a predetermined distance 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 connecting holes in the circumferential direction; the top of the sealing valve seat 18 is located The plane is away from the connector 37 relative to the plane where the sealing valve seat sleeve 12 is located, wherein an inverted truncated cone-shaped groove is provided at the top of the sealing valve seat sleeve 12, and the top of the inverted truncated cone-shaped groove is located in the same plane as the top of the sealing valve seat 18 to form an inwardly concave sealing groove, and the bottom of the sleeve 20 is located in the inwardly concave sealing groove; when the fluid needs to flow in the throttling sealing valve, the piston 15 can be driven to move by the driving component so that the bottom of the extension member provided with the seventh sealing ring 17 is located at the top of the sealing valve seat 18, so that the fluid can enter between the piston rod and the sealing valve seat 18 along the gap between the two, and because the sealing valve seat 18 and the sealing valve seat sleeve 12 are both provided with through holes, the fluid can pass through the sealing valve seat 18 and the sealing valve seat sleeve 12 in turn and discharge the valve body 36 from the pipeline outlet.

[0055] The driving assembly includes a fixture 23 arranged in the placement cavity, an actuator rod 8 that passes through the fixture 23 and is movably connected to the fixture 23, and an actuator part that is threadedly connected to the actuator rod 8; wherein, a second sealing ring 9 and a third sealing ring 10 are sleeved on the actuator rod 8, and a fixture sealing ring 22 is provided between the fixture 23 and the valve body 36; wherein, an external thread is provided at one end of the actuator rod 8, and an internal thread hole is provided at the other end; a connecting head 37 is threadedly connected to the internal thread hole on the actuator rod 8; the actuator part includes a disc motor 2 installed on the valve body 36 by a fixing screw 24, a driving gear arranged at the output end of the disc motor 2, a gear ring 4 meshing with the driving gear, a ball bearing 5 located between the toothless surface of the gear ring 4 and the fixture 23, an actuator frame 7 that abuts against the inner ring of the ball bearing 5 and is fixed to the gear ring 4 by a mounting screw 6, and a valve body 36 disposed on the actuator frame 7 Nut 35; wherein 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 holder 23; one end of the actuator rod 8 is screwed with the nut 35; in order to be able to dissipate heat for the disc motor 2, the disc motor 2, the drive assembly and the fixing seat are immersed in hydraulic oil, and the second sealing ring 9 and the third sealing ring 10 are provided to separate the fluid and the hydraulic oil to avoid mixing between the fluid and the hydraulic oil. At the same time, since the device is generally used in oil wells, and the oil in the oil wells has a large pressure, in order to avoid damage to the device, an annular plate is provided on the actuator rod 8, and a limiting groove is provided on the holder 23. When the annular plate abuts against the bottom of the limiting groove or the annular plate abuts against the actuator frame 7, the actuator rod 8 reaches the maximum stroke at this time, which limits the position of the actuator rod 8 and ensures the smooth operation of the throttling sealing valve. At this time, the valve is in a fully open state.

[0056] In a further embodiment, when the driving assembly is working, the disc motor 2 starts to work, and the moving disc motor 2 can drive the driving gear to rotate. Since the driving gear is meshed with the toothed surface of the ring gear 4, when the driving gear rotates, the ring gear 4 can be rotated, and the actuator frame 7 is fixed to the ring gear 4 by the mounting screws 6. The actuator frame 7 can rotate with the ring gear 4, and the nut 35 is arranged on the actuator frame 7. When the actuator frame 7 starts to rotate, the actuator rod 8 reciprocates in the axial direction of the actuator frame 7 according to the rotation direction of the actuator frame 7, thereby adjusting the position of the piston 15 and controlling the movement of the fluid in the valve body 36;

[0057] In a further embodiment, the disc motor 2 is a 50 volt DC brushless stepper motor with a permanent magnet rotor, with a step of 10 degrees, and the movement of the piston 15 is finely controlled by the actuator, and the position of the piston 15 can be determined by the Hall effect sensor installed on the disc motor 2; when the device is used on the oil logging instrument, the ground system can display the scale of the throttle sealing valve position from 0 (fully closed) to 140 (fully open). The throttle sealing valve opens at about 90 counts; the movement of the piston 15 is calculated as follows:

[0058] The gear ratio between the driving 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 teeth per inch, that is, 25.4*1 / 16=1.5875mm; when the driving gear shaft of the disc motor 2 rotates 1 circle, the gear ring 4 rotates 1 / 4 circle, that is, the nut 35 and the actuator rod 8 both rotate 1 / 4 circle, then the actuator rod 8 drives the piston 15 to move 1.5875*1 / 4≈0.4mm, that is, the disc motor 2 rotates one circle, and the piston 15 moves up / down 0.4mm. The Hall effect sensor is used to detect the number of rotations of the disc motor 2, thereby calculating the up and down movement of the piston 15. According to the up and down movement of the piston 15, the positional relationship between the seventh sealing ring 17 and the sealing member is adjusted, thereby controlling the flow rate of the fluid through the throttling sealing valve.

[0059] In a further embodiment, the throttling sealing valve is driven by a 50V DC brushless stepper motor, namely a disc motor 2, which is controlled by a ground system and can operate in a sealing mode or a throttling mode; wherein whether the throttling sealing valve adopts a sealing mode or a throttling mode mainly depends on the moving distance of the piston 15 in the sealing valve seat 18. In the throttling mode, the fluid flow can be restricted without being completely closed. When the piston 15 moves up and down in the sealing valve seat 18 until it cannot move, the throttling sealing valve will fully open or close the valve. When the piston 15 moves toward the direction close to the actuator rod 8 until it cannot move, the throttling sealing valve is fully opened, and the position of the piston 15 at this time is the maximum displacement distance. Conversely, when it moves toward the direction away from the actuator rod 8 until it cannot move, the throttling sealing valve is fully closed, and the position of the piston 15 at this time is the minimum displacement distance. When the piston 15 is between the minimum displacement distance and the maximum displacement distance, the throttling sealing valve is in the 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, wherein the sealing member can also be set as an integrated structure, thereby reducing the use of sealing rings.

[0061] The auxiliary component includes a hole cover 1 arranged on the valve body 36 for wrapping the disc motor 2, and a first sealing ring 3 is provided between the hole cover 1 and the valve body 36; the actuator is located in a accommodating cavity surrounded by the hole cover 1, the valve body 36 and the fixer 23, and the accommodating cavity is filled with hydraulic oil, and the actuator is immersed in the hydraulic oil; in the process of driving the throttling sealing valve to move, the disc motor 2 is required to rotate, and the disc motor 2 will generate heat during the rotation process, so by immersing it in the hydraulic oil, the motor temperature can be reduced to ensure the normal operation of the disc motor 2.

[0062] The valve body 36 is provided with a compensation channel and a safety channel which are horizontal to the axis direction of the actuator rod 8 and communicated with the accommodating chamber, as well as a compensation sealing valve piston arranged in the compensation channel and a safety valve 32 arranged in the safety channel; a limit clamp is arranged on the inner wall of the compensation channel, and a retaining ring 25 is arranged in the limit clamp; the compensation sealing valve piston includes a compensation piston 26, and a compensation sealing ring 27 arranged 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 27 arranged on the safety channel. The safety sealing ring between the safety valve seat and the safety channel; since the device is used in downhole oil production, the liquid outside the valve body 36 will exert a certain hydrostatic pressure on 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, thereby playing a role in compensating the pressure of the hydraulic oil; during the oil injection process, the safety valve 32 can be set, and when the hydraulic oil in the accommodating chamber exerts 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 (in the wellbore), so as to prevent the hydraulic oil tank from being over-pressurized and damaging the disc motor 2.

[0063] The valve body 36 is also provided with an oil filling channel, a pressure-bearing channel and a wire-passing channel which are connected to the accommodating chamber; one end of the wire-passing channel is connected to the side of the pressure-bearing channel; the oil filling channel is provided with an oil filling plug 33, and an oil filling sealing ring 34 which is sleeved on the oil filling plug 33 and abuts against the inner wall of the oil filling channel; the pressure-bearing channel is provided with an 8-core pressure-bearing joint 29, and a pressure-bearing sealing ring 28 arranged between the 8-core pressure-bearing joint 29 and the pressure-bearing channel, and the 8-core pressure-bearing joint 29 is electrically connected to the disc motor 2; the wire-passing channel and the pressure-bearing channel are located on both sides of the 8-core pressure-bearing joint 29; a wire-passing hole plug 31 is provided 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-passing hole sealing ring 30 is sleeved on the wire-passing hole plug 31; by providing the 8-core pressure-bearing joint 29, the pressure-bearing channel and the wire-passing channel can be separated, thereby ensuring the normal operation of the line.

[0064] Working principle description: Before work, the operator can remove the oil filling plug 33 and inject hydraulic oil into the accommodating chamber. At this time, the hydraulic oil is in the accommodating chamber, and the compensation piston 26 is in contact with the retaining ring 25. When the throttling sealing valve is located in the wellbore, the external high-pressure fluid can push the compensation piston 26 to move in the compensation channel; when the throttling sealing valve needs to be opened, the disc motor 2 starts to work, and the moving disc motor 2 can drive the driving gear to rotate. Since the driving gear and the ring gear 4 have tooth surfaces meshing, when the driving gear rotates, the ring gear 4 can rotate. , and the actuator frame 7 is fixed to the gear ring 4 by installing screws 6. The actuator frame 7 can rotate with the gear ring 4, and the nut 35 is set on the actuator frame 7. When the actuator frame 7 starts to rotate, the actuator rod 8 reciprocates in the axial direction of the actuator frame 7 according to the rotation direction of the actuator frame 7; when the actuator rod 8 starts to move, the moving actuator rod 8 can drive the connecting head 37 screwed thereto to move in the placement cavity, and the moving connecting head 37 can drive the piston rod to move. When the top of the extension piece close to the sheath 20 abuts against the inner wall of the sheath 20, as the drive assembly The fluid flows into the placement cavity from the pipeline inlet in the valve body 36, flows into the space between the two extensions along the space between the sheath 20 and the seal, and flows out from the pipeline outlet along the channel on the seal; when the fluid needs to be stopped, the driving assembly can drive the connector 37 to move in the opposite direction. Since 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 located in the sealing groove on the sealing member, and at the same time, under the operation of the driving assembly, the extension member can be located in the sealing member to block the fluid from entering the middle area of ​​the two extension members, thereby completing the fluid interception work; by controlling the gap between the sheath 20 and the sealing member and the distance between the extension member and the top of the sealing member, the flow rate and flow amount of the fluid are controlled; when the fluid flows into between the two extension members, the fluid can flow into the pipeline outlet along the through holes on the sealing valve seat 18 and the sealing valve seat sleeve 12, thereby completing the discharge or collection of the fluid.

[0065] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A disc motor driven throttling sealing valve, characterized in that: include: A valve body (36) is provided with a placement cavity, a driving assembly is provided in the placement cavity, and a pipeline inlet and a pipeline outlet for fluid to pass through are provided on the valve body (36); The piston (15) is an integrated structure, comprising a connecting head (37) threadedly connected to the driving assembly, and a piston rod connected to the connecting head (37); A sealing member, arranged in the placement cavity and sleeved on the piston (15), wherein the sealing member is provided with a channel for fluid flow; A sheath (20) is sleeved on the output end of the driving assembly, wherein the connection between the driving assembly and the piston (15) is located inside the sheath (20), and a predetermined gap exists between the sheath (20) and the wall of the placement chamber; Both ends of the piston rod extend toward the seal to form extensions and abut against the inner wall of the seal. A predetermined gap exists 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.

2. A disc-type motor-driven throttling sealing valve according to claim 1, characterized in that: The top of the sealing member is provided with an inwardly concave sealing groove, the bottom of the sleeve (20) is provided with a protruding member adapted to the sealing groove, a circle of abutment ring is provided on the curved surface of the sleeve (20), and a throttle spring (21) is provided between the drive assembly and the sleeve (20); The two extension pieces are respectively provided with placement grooves, and sealing rings are provided in the placement grooves, wherein the sealing ring on the extension piece near the connecting head (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 arranged on the abutment ring, and the other end is connected to the driving assembly; The throttle valve spring (21) is in a compressed state.

3. A disc-type motor-driven throttling sealing valve according to claim 2, characterized in that: The sealing member is a split structure, comprising a sealing valve seat (18), a sealing valve seat sleeve (12) and a sealing valve cover (14), wherein a movable groove for the piston (15) to move is formed between the three. The sealing valve seat (18) is arranged on the piston (15), and a gourd-shaped through hole is arranged therein, and the piston (15) passes 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 connector (37) extends toward a position close to the valve body (36), so that a fluid flow channel 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 communicating holes in the circumferential direction.

4. A disc-type motor-driven throttling sealing valve according to claim 3, characterized in that: The driving assembly comprises a fixture (23) disposed in the placement cavity, an actuator rod (8) penetrating the fixture (23) and movably connected to the fixture (23), and an actuator portion threadedly connected to the actuator rod (8); Wherein, the actuating rod (8) is sleeved with a second sealing ring (9) and a third sealing ring (10), and a fixing sealing ring (22) is provided between the fixing (23) and the valve body (36); One end of the actuator rod (8) is provided with an external thread, and the other end is provided with an internal thread hole; The connecting head (37) is threadedly connected to the internal threaded hole on the actuator rod (8).

5. A disc-type motor-driven throttling sealing valve according to claim 4, characterized in that: The actuator comprises a disc motor (2) mounted on the valve body (36) by means of fixing screws (24), a driving gear provided at the output end of the disc motor (2), a gear ring (4) meshing with the driving gear, a ball bearing (5) located between the toothless surface of the gear ring (4) and the fixer (23), an actuator frame (7) abutting against the inner ring of the ball bearing (5) and fixed to the gear ring (4) by means of mounting screws (6), and a nut (35) provided on the actuator frame (7); The inner ring of the ball bearing (5) abuts against the non-toothed surface of the gear ring (4), and the outer ring of the ball bearing (5) abuts against the inner wall of the holder (23); One end of the actuating rod (8) is threadedly connected to a nut (35).

6. A disc-type motor-driven throttling sealing valve according to claim 5, characterized in that: 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).

7. A disc-type motor-driven throttling sealing valve according to claim 6, characterized in that: Also included are auxiliary components; The auxiliary component comprises a hole cover (1) arranged on the valve body (36) for wrapping the disc motor (2), and a first sealing ring (3) is arranged between the hole cover (1) and the valve body (36); The actuator is located in a receiving cavity surrounded by the hole cover (1), the valve body (36) and the fixer (23); the receiving cavity is filled with hydraulic oil, and the actuator is immersed in the hydraulic oil.

8. A disc-type motor-driven throttling sealing valve according to claim 7, characterized in that: The valve body (36) is provided with a compensation channel and a safety channel which are parallel to the axis direction of the actuator rod (8) and communicated with the accommodating chamber, a compensation sealing valve piston arranged in the compensation channel and a safety valve (32) arranged in the safety channel; The inner wall of the compensation channel is provided with two limit clamping plates, and a retaining ring (25) is provided between the limit clamping plates; The compensating sealing valve piston comprises a compensating piston (26) and a compensating sealing ring (27) arranged between a body of the compensating piston (26) and a compensating channel; The safety valve (32) comprises a safety valve seat located in the safety passage, and a safety sealing ring sleeved between the safety valve seat and the safety passage.

9. A disc-type motor-driven throttling sealing valve according to claim 8, characterized in that: The valve body (36) is also provided with an oil injection channel, a pressure-bearing channel and a wire-passing channel which are in communication with the accommodating cavity; One end of the wire-passing channel 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) which is sleeved on the oil injection plug (33) and abuts against the inner wall of the oil injection channel.

10. A disc-type motor-driven throttling sealing valve according to claim 9, characterized in that: An 8-core pressure-bearing joint (29) and a pressure-bearing sealing ring (28) are arranged in the pressure-bearing channel, and the 8-core pressure-bearing joint (29) is electrically connected to the disc motor (2); 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 provided 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 sleeved on the wire hole plug (31).

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