Safety valve driver mounting device

Abstract

The invention relates to the technical field of oil and gas well testing ground equipment, in particular to a safety valve driver mounting device which is used for assembling a spring, a spring seat and a clamp spring in a safety valve driver and comprises a hydraulic cylinder and a connecting sleeve, the hydraulic cylinder comprises a cylinder body, a piston and a piston rod, and the piston capable of retracting upwards or extending downwards relative to the cylinder body is arranged in the cylinder body. The connecting sleeve is of a vertically-through cylindrical barrel structure, the inner diameter of the connecting sleeve is larger than the inner diameter of the clamping spring and smaller than the outer diameter of the clamping spring, a limiting ring table is arranged at the position, close to the lower end of the piston rod by a certain distance, of the piston rod, and the outer diameter of the limiting ring table is slightly smaller than the inner diameter of the connecting sleeve and larger than the inner diameter of the clamping spring. The diameter of the piston rod is smaller than that of the snap spring. The device is reasonable in structure, the assembly efficiency of the assembly operation of the spring in the safety valve driver is greatly improved, and the labor intensity of operators is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas well testing ground equipment, and is a safety valve driver installation device. Background Art

[0002] It is necessary to install ground safety valves in the ground metering test of high-pressure wells to ensure that emergency well shut-in can be implemented in case of abnormal leakage in the process. As exploration and development advances to ultra-deep layers of 9,000m and 10,000m, the pressure-bearing performance of ground safety valves has increased from 140MPa to 175MPa, and the volume of the spring inside the safety valve driver has become larger and larger. This has led to increasing difficulty in assembling the spring inside the safety valve driver, and it has also become more time-consuming and labor-intensive during manual operations. How to achieve convenient installation of the spring inside the safety valve driver has become a major problem that needs to be solved urgently. Summary of the invention

[0003] The present invention provides a safety valve driver installation device, which overcomes the above-mentioned shortcomings of the prior art and can effectively solve the problems of high labor intensity and low assembly efficiency of the existing safety valve driver inner spring assembly operation.

[0004] The technical solution of the present invention is achieved through the following measures: a safety valve driver installation device, used for assembling a spring, a spring seat and a retaining spring in a safety valve driver, comprising a hydraulic cylinder and a connecting sleeve, the hydraulic cylinder comprising a cylinder body, a piston and a piston rod, a piston which can be retracted upward or extended downward relative to the cylinder body is arranged in the cylinder body, a piston rod is threadedly connected to the lower end of the piston, the connecting sleeve is a cylindrical cylinder structure which passes through from top to bottom, the inner diameter of the connecting sleeve is larger than the inner diameter of the retaining spring and smaller than the outer diameter of the retaining spring, an outer ring groove is arranged on the outer side of the lower part of the connecting sleeve, a connecting thread for being threadedly connected with the outer side of the upper part of the safety valve driver housing is arranged on the inner wall of the outer ring groove, the inner diameter of the connecting sleeve is the same as the inner diameter of the safety valve driver housing, the lower part of the piston rod is coaxially penetrated in the connecting sleeve, a limiting ring platform is arranged on the piston rod at a certain distance near its lower end, the outer diameter of the limiting ring platform is slightly smaller than the inner diameter of the connecting sleeve and larger than the inner diameter of the retaining spring, and the diameter of the piston rod is smaller than the inner diameter of the retaining spring.

[0005] The following are further optimizations and / or improvements to the above invention: The above-mentioned safety valve driver installation device also includes a hydraulic station, a control cabinet, a first position sensor, a second position sensor and a pressure transmitter. A controller is arranged in the control cabinet. At least two vertical guide columns are evenly spaced along the circumferential direction at the upper end of the connecting sleeve. A connecting disk is arranged on the outer side of the upper part of the piston rod. A guide hole is arranged on the connecting disk corresponding to the position of each guide column. Each guide column is inserted into a corresponding guide hole. A first position sensor is arranged on the connecting disk. A second position sensor is arranged on the guide column corresponding to the position of the first position sensor. A pressure transmitter is arranged at the lower end of the piston rod. The hydraulic cylinder is connected to the hydraulic station. The hydraulic station, the first position sensor, the second position sensor and the pressure transmitter are all connected to the controller.

[0006] The controller mentioned above may be a PLC controller.

[0007] The inner wall at the upper port of the above-mentioned connecting sleeve can be a conical surface with a larger upper part and a smaller lower part. The diameter of the upper end of the conical surface is larger than the outer diameter of the retaining spring, and the diameter of the lower end of the conical surface is equal to the inner diameter of the connecting sleeve. A retaining spring set centering mechanism is provided at the bottom of the limiting ring platform. The retaining spring set centering mechanism includes 4 groups of claw assemblies that are evenly arranged at intervals along the circumferential direction at the bottom of the limiting ring platform; each group of claw assemblies includes a T-shaped slide groove that is arranged on the bottom surface of the limiting ring platform and extends radially thereof, a T-shaped slider is slidably installed in the T-shaped slide groove, and a T-shaped slide block is provided between the inner wall of one end of the T-shaped slide groove close to the central axis of the limiting ring platform and the T-shaped slider. There is a guide telescopic rod, which includes a guide outer rod and a guide inner rod with one end inserted into the guide outer rod, the end of the guide outer rod away from the guide inner rod is fixedly connected to the inner wall of the T-shaped slide groove, the end of the guide inner rod away from the guide outer rod is fixedly connected to the T-shaped slide block, and a return spring is sleeved on the outer side of the guide telescopic rod. The return spring is a spiral compression spring, and the two ends of the return spring are respectively fixedly connected to the inner wall of the T-shaped slide groove and the T-shaped slide block, and an arc-shaped claw is fixedly connected to the bottom of the T-shaped slide block; the retaining spring can be sleeved on the outer sides of the 4 arc-shaped claws of the 4 groups of claw assemblies.

[0008] The invention has a reasonable structure. The spring of the safety valve driver is compressed by the hydraulic cylinder, and the retaining spring is pushed into the retaining spring installation ring groove on the inner wall of the safety valve driver housing, thereby completing the assembly of the spring, spring seat and retaining spring in the safety valve driver. The whole assembly process is simple and convenient, saving time and labor, greatly improving the assembly efficiency of the spring assembly operation in the safety valve driver and reducing the labor intensity of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attached Figure 1 It is a schematic diagram of the partial cross-sectional structure of the main view of the first embodiment of the present invention.

[0010] Attached Figure 2 It is a schematic diagram of the partial cross-sectional structure of the main view during the assembly operation of the first embodiment of the present invention.

[0011] Attached Figure 3This is a circuit block diagram of Embodiment 1 of the present invention.

[0012] Attached Figure 4 It is a schematic diagram of the partial cross-sectional structure of the front view when the retaining spring has not entered the connecting sleeve in the second embodiment of the present invention.

[0013] Attached Figure 5 It is a schematic diagram of the partial cross-sectional structure of the main view when the retaining spring is located in the connecting sleeve in the second embodiment of the present invention.

[0014] Attached Figure 6 For attachment Figure 3 Enlarged structural diagram at A in the middle.

[0015] Attached Figure 7 It is a schematic diagram of the structure of the piston rod, the limit ring and the centering mechanism of the retaining ring set when the retaining ring has not entered the connecting sleeve in the second embodiment of the present invention.

[0016] Attached Figure 8 It is a bottom view structural schematic diagram of the piston rod, the limit ring and the centering mechanism of the retaining spring set when the retaining spring is located in the connecting sleeve in the second embodiment of the present invention.

[0017] The codes in the accompanying drawings are: 1 is a cylinder body, 2 is a piston, 3 is a piston rod, 4 is a connecting sleeve, 5 is an outer ring groove, 6 is a limit ring platform, 7 is a controller, 8 is a first position sensor, 9 is a second position sensor, 10 is a pressure transmitter, 11 is a guide column, 12 is a connecting plate, 13 is a T-type slide groove, 14 is a T-type slide block, 15 is a guide outer rod, 16 is a guide inner rod, 17 is a return spring, 18 is an arc-shaped claw, 19 is a safety valve driver housing, 20 is a spring, 21 is a spring seat, 22 is a retaining spring, 23 is a retaining spring mounting ring groove, 24 is a hydraulic cylinder, and 25 is a hydraulic station. DETAILED DESCRIPTION

[0018] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0019] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0020] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figure 1-3As shown, the safety valve driver installation device is used for assembling the spring 20, the spring seat 21, and the retaining spring 22 in the safety valve driver, and includes a hydraulic cylinder 24 and a connecting sleeve 4. The hydraulic cylinder 24 includes a cylinder body 1, a piston 2, and a piston rod 3. The cylinder body 1 is provided with a piston 2 that can be retracted upward or extended downward relative to the cylinder body 1. The lower end of the piston 2 is threadedly connected with the piston rod 3. The connecting sleeve 4 is a cylindrical cylinder structure that passes through from top to bottom. The inner diameter of the connecting sleeve 4 is larger than the inner diameter of the retaining spring 22 and smaller than the outer diameter of the retaining spring 22. An outer ring groove 5 is provided on the outer side of the lower part of the sleeve 4, and a connecting thread is provided on the inner wall of the outer ring groove 5 for connecting with the outer thread of the upper part of the safety valve driver housing 19. The inner diameter of the connecting sleeve 4 is the same as the inner diameter of the safety valve driver housing 19. The lower part of the piston rod 3 is coaxially penetrated into the connecting sleeve 4. A limiting ring platform 6 is provided on the piston rod 3 at a certain distance near its lower end. The outer diameter of the limiting ring platform 6 is slightly smaller than the inner diameter of the connecting sleeve 4 and larger than the inner diameter of the retaining spring 22. The diameter of the piston rod 3 is smaller than the inner diameter of the retaining spring 22.

[0021] According to the requirements, an inner ring groove is provided on the inner side of the upper part of the safety valve driver housing 19 adapted to the safety valve driver installation device, and a connecting thread is provided on the inner wall of the inner ring groove for connecting the outer side of the lower part of the connecting sleeve 4 together with the thread. Therefore, when the outer side of the lower part of the connecting sleeve 4 in this application is connected to the inner side of the upper part of the safety valve driver housing 19 with the thread, the inner wall of the connecting sleeve 4 and the inner wall of the safety valve driver housing 19 are smoothly transitioned and connected together. A retaining spring mounting ring groove 23 is provided on the inner wall of the safety valve driver housing 19, and the outer diameter of the spring seat 21 is larger than the inner diameter of the retaining spring 22; a limiting ring platform 6 is provided on the piston rod 3 at a certain distance near its lower end, and the certain distance is greater than the thickness of the retaining spring 22, so that the retaining spring 22 can be mounted on the outer side of the piston rod 3 located at the lower side of the limiting ring platform 6.

[0022] When assembling the spring 20 in the safety valve driver, first put the spring 20 and the spring seat 21 into the safety valve driver housing 19, then thread the outer side of the lower part of the connecting sleeve 4 and the inner side of the upper part of the safety valve driver housing 19 together, and then put the retaining spring 22 on the outer side of the piston rod 3 located at the lower side of the limiting ring 6. Since the outer diameter of the retaining spring 22 is larger than the inner diameter of the connecting sleeve 4, when the retaining spring 22 is on the outer side of the piston rod 3, it is squeezed by the inner wall of the connecting sleeve 4 to be in a contracted state, and then the piston rod 3 is driven downward by the hydraulic cylinder. When the piston rod 3 moves downward, the limiting ring 6 pushes the retaining spring 22 to move downward. The lower end of the piston rod 3 abuts against the top of the spring seat 21 and pushes the spring seat 21 downward to compress the spring 20. When the limit ring 6 pushes the retaining spring 22 to move to the position of the retaining spring mounting groove 23, the retaining spring 22 automatically expands and snaps into the retaining spring mounting groove 23. At this time, the hydraulic cylinder controls the piston rod 3 to move upward, and the spring seat 21 is pushed upward under the rebound force of the spring 20 until it is aligned with the retaining spring 22, thereby realizing the assembly operation of the spring 20 in the safety valve driver. The entire assembly process is simple and convenient, saving time and effort, greatly improving the assembly efficiency of the spring 20 in the safety valve driver and reducing the labor intensity of the operators.

[0023] The above embodiment 1 may be further optimized and / or improved according to actual needs: As attached Figure 1-3As shown, the safety valve driver installation device also includes a hydraulic station 25, a control cabinet, a first position sensor 8, a second position sensor 9 and a pressure transmitter 10. A controller 7 is arranged in the control cabinet. At least two vertical guide columns 11 are evenly spaced along the circumferential direction at the upper end of the connecting sleeve 4. A connecting disk 12 is arranged on the outer side of the upper part of the piston rod 3. A guide hole is arranged on the connecting disk 12 corresponding to the position of each guide column 11. Each guide column 11 is penetrated into a corresponding guide hole. A first position sensor 8 is arranged on the connecting disk 12. A second position sensor 9 is arranged on the guide column 11 corresponding to the position of the first position sensor 8. A pressure transmitter 10 is arranged on the lower end of the piston rod 3. The hydraulic cylinder 24 is connected to the hydraulic station 25. The hydraulic station 25, the first position sensor 8, the second position sensor 9, and the pressure transmitter 10 are all connected to the controller 7. According to the requirements, the first position sensor 8, the second position sensor 9, the pressure transmitter 10 and the controller 7 can all adopt the existing well-known technologies. Specifically, the controller 7 is a PLC controller. By setting the first position sensor 8 and the second position sensor 9, the downward movement distance of the piston rod 3 can be monitored in real time. When the retaining ring 22 moves into the retaining ring mounting groove 23, the first position sensor 8 and the second position sensor 9 send a signal to the controller 7, and then the controller 7 controls the hydraulic cylinder to stop pushing the piston rod 3 downward, thereby preventing the spring 20 from being compressed too much and failing. The pressure transmitter 10 can monitor the pressure of the piston rod 3 on the spring seat 21 in real time, thereby preventing the spring 20 from failing due to excessive pressure. The present invention reduces labor and improves efficiency through hydraulic drive and automatic real-time control. The pressure transmitter 10 and the position sensor record and collect data to complete the batch assembly of safety valve drivers, saving time and effort.

[0024] Embodiment 2: As shown in the attached Figure 4-8As shown, the difference between this embodiment and the first embodiment is that: the inner wall at the upper port of the connecting sleeve 4 is a conical surface with a larger upper part and a smaller lower part, the upper end diameter of the conical surface is larger than the outer diameter of the retaining spring 22, and the lower end diameter of the conical surface is equal to the inner diameter of the connecting sleeve 4, and a retaining spring set centering mechanism is provided at the bottom of the limiting ring 6, and the retaining spring set centering mechanism includes 4 groups of claw assemblies uniformly arranged at intervals along the circumferential direction at the bottom of the limiting ring 6; each group of claw assemblies includes a T-shaped groove 13 arranged on the bottom surface of the limiting ring 6 and extending radially thereof, a T-shaped slider 14 is slidably installed in the T-shaped groove 13, and the inner wall of one end of the T-shaped groove 13 close to the central axis of the limiting ring 6 and the T-shaped slider A guide telescopic rod is provided between the blocks 14, and the guide telescopic rod includes a guide outer rod 15 and a guide inner rod 16 with one end inserted into the guide outer rod 15, one end of the guide outer rod 15 away from the guide inner rod 16 is fixedly connected to the inner wall of the T-shaped slide groove 13, and one end of the guide inner rod 16 away from the guide outer rod 15 is fixedly connected to the T-shaped slider 14, and a return spring 17 is sleeved on the outer side of the guide telescopic rod, and the two ends of the return spring 17 are respectively fixedly connected to the inner wall of the T-shaped slide groove 13 and the T-shaped slider 14, and an arc-shaped claw 18 is fixedly connected to the bottom of the T-shaped slider 14; the retaining spring 22 can be sleeved on the outer sides of the four arc-shaped claws 18 of the four groups of claw assemblies.

[0025] Since the outer diameter of the retaining spring 22 is larger than the inner diameter of the connecting sleeve 4, in the first embodiment, when the retaining spring 22 is inserted into the connecting sleeve 4, it is necessary to manually shrink the retaining spring 22. In this embodiment, the inner wall at the upper port of the connecting sleeve 4 is set to a conical surface with a larger upper portion and a smaller lower portion. Therefore, in the assembly operation, after the outer side of the lower portion of the connecting sleeve 4 is threadedly connected with the inner side of the upper portion of the safety valve driver housing 19, the piston rod 3 is first withdrawn upward to the outside of the connecting sleeve 4, and then the four arc-shaped claws 18 are brought inward and the retaining spring 22 is sleeved on the outer side of the four arc-shaped claws 18. At this time, the reset spring 17 In a compressed state, the four arc-shaped claws 18 press the retaining spring 22 outward under the restoring force of the reset spring 17, thereby ensuring that the retaining spring 22 will not fall off the four arc-shaped claws 18. Specifically, the reset spring 17 is a spiral compression spring, and the arc-shaped claw 18 is an arc plate structure. Then the hydraulic cylinder controls the piston rod 3 to move downward, thereby driving the retaining spring 22 to move downward. When the retaining spring 22 moves to the conical surface position, since the diameter of the upper end of the conical surface is greater than the outer diameter of the retaining spring 22, as the limiting ring 6 squeezes the retaining spring 22 downward, the retaining spring 22 slides along the conical surface and contracts until it moves into the connecting sleeve 4. That is, through the setting of the conical surface in this embodiment, there is no need to manually shrink the retaining spring 22 to make it enter the connecting sleeve 4. Instead, through the setting of the retaining spring set centering mechanism, it is ensured that when the retaining spring 22 is set on the outside of the four arc-shaped claws 18, the central axis of the retaining spring 22 and the central axis of the limiting ring 6 are in line. Therefore, when the retaining spring 22 moves to the conical surface position, the outer ring of the retaining spring 22 can contact the conical surface, and the retaining spring 22 will not be blocked by the upper end surface of the connecting sleeve 4 and cannot automatically shrink along the conical surface due to the position offset of the retaining spring 22. This makes the entire assembly process more convenient and labor-saving.

[0026] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A safety valve driver installation device, used for assembling the spring, spring seat and retaining spring in the safety valve driver, characterized in that The invention comprises a hydraulic cylinder and a connecting sleeve. The hydraulic cylinder comprises a cylinder body, a piston and a piston rod. A piston which can be retracted upward or extended downward relative to the cylinder body is arranged in the cylinder body. The piston rod is threadedly connected to the lower end of the piston. The connecting sleeve is a cylindrical cylinder structure which passes through from top to bottom. The inner diameter of the connecting sleeve is larger than the inner diameter of the retaining spring and smaller than the outer diameter of the retaining spring. An outer ring groove is arranged on the outer side of the lower part of the connecting sleeve. A connecting thread which is used for being threadedly connected to the outer side of the upper part of the safety valve driver housing is arranged on the inner wall of the outer ring groove. The inner diameter of the connecting sleeve is the same as the inner diameter of the safety valve driver housing. The lower part of the piston rod is coaxially penetrated in the connecting sleeve. A limiting ring is arranged on the piston rod at a certain distance near the lower end thereof. The outer diameter of the limiting ring is slightly smaller than the inner diameter of the connecting sleeve and larger than the inner diameter of the retaining spring. The diameter of the piston rod is smaller than the inner diameter of the retaining spring.

2. The safety valve actuator installation device according to claim 1, characterized in that It also includes a hydraulic station, a control cabinet, a first position sensor, a second position sensor and a pressure transmitter. A controller is arranged in the control cabinet. At least two vertical guide columns are evenly spaced along the circumferential direction at the upper end of the connecting sleeve. A connecting disk is arranged on the outer side of the upper part of the piston rod. A guide hole is arranged on the connecting disk corresponding to the position of each guide column. Each guide column is inserted into a corresponding guide hole. A first position sensor is arranged on the connecting disk. A second position sensor is arranged on the guide column corresponding to the position of the first position sensor. A pressure transmitter is arranged on the lower end of the piston rod. The hydraulic cylinder is connected to the hydraulic station. The hydraulic station, the first position sensor, the second position sensor and the pressure transmitter are all connected to the controller.

3. The safety valve actuator installation device according to claim 2, characterized in that The controller is a PLC controller.

4. The safety valve actuator installation device according to claim 1, 2 or 3, characterized in that The inner wall at the upper port of the connecting sleeve is a conical surface with a larger upper part and a smaller lower part. The upper diameter of the conical surface is larger than the outer diameter of the retaining ring, and the lower diameter of the conical surface is equal to the inner diameter of the connecting sleeve. A retaining ring set centering mechanism is provided at the bottom of the limiting ring.

5. The safety valve actuator mounting device according to claim 4, characterized in that The centering mechanism of the retaining spring set includes four groups of claw assemblies which are evenly arranged at circumferential intervals at the bottom of the limiting ring platform; each group of claw assemblies includes a T-shaped slide groove which is arranged on the bottom surface of the limiting ring platform and extends radially thereof, a T-shaped slider is slidably installed in the T-shaped slide groove, and a guide telescopic rod is provided between the inner wall of one end of the T-shaped slide groove close to the central axis of the limiting ring platform and the T-shaped slider.

6. The safety valve actuator mounting device according to claim 5, characterized in that The guide telescopic rod includes a guide outer rod and a guide inner rod with one end inserted into the guide outer rod, the end of the guide outer rod away from the guide inner rod is fixedly connected to the inner wall of the T-shaped slide groove, the end of the guide inner rod away from the guide outer rod is fixedly connected to the T-shaped slider, a return spring is sleeved on the outer side of the guide telescopic rod, the two ends of the return spring are respectively fixedly connected to the inner wall of the T-shaped slide groove and the T-shaped slider, and an arc-shaped claw is fixedly connected to the bottom of the T-shaped slider; the retaining spring can be sleeved on the outer sides of the four arc-shaped claws of the four groups of claw assemblies.

7. The safety valve actuator mounting device according to claim 6, characterized in that The return spring is a helical compression spring.

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