Tool for maintaining special petroleum valve

Abstract

The invention relates to the technical field of valve maintenance, in particular to a tool for maintaining a special petroleum valve, which comprises a base, a driving unit is mounted in the middle of the upper end of the base, a valve body clamping unit is mounted on the driving unit, and a butterfly plate clamping unit is mounted on the valve body clamping unit through a synchronous adjusting unit; the grinding and repairing device is used for grinding and repairing a valve seat sealing face and a butterfly plate sealing face in a valve body of the three-eccentric center butterfly valve, valve bodies and valve seats of different sizes and specifications can be clamped and fixed, the maintenance efficiency of the three-eccentric center butterfly valve is ensured, meanwhile, the inclination angles of the valve seats and the butterfly plate can be synchronously adjusted, and the service life of the three-eccentric center butterfly valve is prolonged. And the butterfly plate and the valve seat are aligned up and down, so that the central axis of the valve body and the central axis of the butterfly plate are collinear, the maintenance processes of the sealing surfaces of the valve body and the butterfly plate are associated together, and accumulative errors caused by independent maintenance of the sealing surfaces of the valve body and the butterfly plate during subsequent assembly are remarkably reduced.

Description

Technical Field

[0001] The invention relates to the technical field of valve maintenance, in particular to a tool for maintaining special petroleum valves. Background Art

[0002] In the fields of oil extraction, transportation, and refining, petroleum special valves, as key fluid control equipment, need to operate for a long time under complex working conditions such as high pressure, high temperature, strong corrosion, and sand particles. Their sealing performance and service life directly affect the safe and stable operation of the entire oil system. Among them, triple eccentric butterfly valves are widely used in the oil field due to their unique structural design. The "three eccentricities" of triple eccentric butterfly valves are specifically manifested as follows:

[0003] Axial eccentricity: There is an axial offset between the valve shaft axis and the sealing surface of the butterfly plate; Radial eccentricity: There is a radial offset between the valve shaft axis and the center axis of the valve body; Angular eccentricity: The sealing surface of the butterfly plate is inclined conical, forming an elliptical sealing cross-section.

[0004] This design enables frictionless contact between the sealing surfaces of the butterfly plate during opening and closing, significantly reducing wear on the sealing surfaces. It also offers advantages such as excellent sealing performance, low operating torque, strong flow capacity, and long service life. It is particularly suitable for high-pressure, large-diameter oil pipeline systems.

[0005] like Figure 8 As shown in the figure, in the structure of the triple-eccentric butterfly valve, a valve seat is fixedly installed in the valve body, and the sealing surface of the valve seat cooperates with the sealing surface of the butterfly plate to realize the sealing function. A valve shaft hole is opened on the valve body, and a connecting hole is opened on the butterfly plate. The valve body and the butterfly plate are assembled by inserting the valve shaft into the valve shaft hole and the connecting hole. During long-term use, the sealing surface of the triple-eccentric butterfly valve is prone to scratches due to factors such as medium erosion and particle wear, resulting in valve leakage. At this time, the sealing surface of the triple-eccentric butterfly valve needs to be repaired by precision grinding to restore the sealing function.

[0006] At present, the maintenance of the sealing surface of the triple-eccentric butterfly valve mostly adopts a split processing method: that is, the operator first disassembles the triple-eccentric butterfly valve in sequence, and then fixes the valve body with a special eccentric fixture to tilt the valve body, and uses a grinding machine to precisely grind and repair the sealing surface of the valve seat in the valve body. Then, another set of eccentric fixtures is used to fix the butterfly plate, so that the butterfly plate is tilted, and the grinding machine is used to precisely grind and repair the sealing surface of the butterfly plate. Finally, the operator assembles the valve body and butterfly plate that have been precisely ground and repaired to complete the maintenance of the triple-eccentric butterfly valve.

[0007] The following problems exist in the existing maintenance of triple-eccentric butterfly valves: since the maintenance processes of the valve seat sealing surface and the butterfly plate sealing surface in the valve body are independent of each other, clamping errors, positioning errors and processing errors are prone to occur when grinding and repairing the sealing surfaces of both. These errors will accumulate and overlap after reassembly, which may lead to the inability to effectively match the processing accuracy of the two sealing surfaces. During the final assembly, the accumulated errors may exceed the allowable range, resulting in substandard sealing performance. In addition, the existing eccentric clamps are mostly used to fix valve bodies and butterfly plates of specific sizes. When repairing the sealing surfaces of triple-eccentric butterfly valves of different sizes, it is necessary to replace the specific eccentric clamps, which affects the maintenance efficiency of the triple-eccentric butterfly valves. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention adopts the following technical solution: a tool for repairing special petroleum valves, comprising a base, a drive unit is installed in the middle of the upper end of the base, a valve body clamping unit is installed on the drive unit, and a butterfly plate clamping unit is installed on the valve body clamping unit through a synchronous adjustment unit; the drive unit includes a continuously rotating active ring rotatably installed on the upper end of the base, the valve body clamping unit includes a support ring arranged on the active ring through an adjustment group, and a plurality of circumferentially evenly arranged fastening plates are installed on the support ring through a synchronous group, and the synchronous group drives the plurality of fastening plates to fasten on the valve body flange. The valve body is centered and fixed; the synchronous adjustment unit includes a synchronous rod of a telescopic structure concentrically arranged in the support ring, a positioning group is installed on the upper end of the synchronous rod, and a limit group for vertically arranging the synchronous rod is connected between the lower end of the synchronous rod and the active ring, and the lower end of the synchronous rod is connected to the butterfly plate clamping unit; the control adjustment group adjusts the central axis position of the inclination angle of the valve seat through the support ring, and the support ring drives the valve body clamping unit to synchronously adjust the inclination angle of the butterfly plate, and locates the valve shaft hole of the valve body through the positioning group. The valve body makes the butterfly plate and the valve body central axis collinear through the positioning group and the synchronous rod, which significantly reduces the cumulative error during the maintenance of the sealing surface.

[0009] Preferably, the synchronization group includes a synchronization plate that is radially slidably mounted on the upper end of the support ring and corresponds one-to-one to the fastening plate. A square hole is provided on the synchronization plate, and the fastening plate is arranged in the corresponding square hole. The upper end of the fastening plate is slidably connected to the corresponding square hole through an elastic reset rod. Two symmetrically arranged inclined holes are provided on the fastening plate, and one end of the inclined hole close to the middle of the support ring is inclined upward. A matching block is slidably installed in the inclined hole, and the matching block is fixedly installed in the corresponding square hole.

[0010] Preferably, an annular hole is provided on the inner side of the support ring, and the synchronization group also includes a synchronization ring rotatably installed in the annular hole, an annular electric slider assembly is connected between the synchronization ring and the support ring, and an arc groove corresponding to the synchronization plate is provided on the synchronization ring, and a synchronization block is slidably installed in the arc groove, and the upper end of the synchronization block slides through the support ring and is fixedly connected to the lower end of the corresponding synchronization plate.

[0011] Preferably, two connecting plates arranged symmetrically on the left and right are fixedly installed on the outer cylindrical surface of the support ring, and a yield slider is installed on the lower end of the left connecting plate for sliding left and right. The continuous rotation of the active ring is realized by the active member connected between it and the base. The adjustment group includes two adjusting blocks arranged symmetrically on the left and right and sliding left and right on the upper end of the active ring, and two U-shaped rods arranged symmetrically front and back are fixedly installed between the two adjusting blocks. An adjusting screw 1 is connected between the right adjusting block and the active ring, a hydraulic rod is installed on the upper end of the left adjusting block, and the upper end of the hydraulic rod is hinged to the lower end of the yield slider, and a support plate is fixedly installed on the upper end of the right adjusting block, and the upper end of the support plate is hinged to the lower end of the right connecting plate.

[0012] Preferably, the positioning group includes an upper and lower sliding sleeve arranged on the outer side of the upper end of the synchronization rod, the upper end of the positioning sleeve is connected to the synchronization rod through a connecting spring, and mounting rods are fixedly installed on the front and rear sides of the positioning sleeve, and the two mounting rods are both threadedly connected to detachable threaded rods on the back sides, and the two threaded rods are both fixedly installed on the back sides. Positioning rods are

[0013] Preferably, the limiting group includes a fixed sleeve arranged on the outer side of the lower end of the fixed end of the synchronization rod, and two L-shaped limiting plates arranged symmetrically front and back are fixedly installed on the outer side of the connecting sleeve. The limiting plate is located at one end of the active ring and is connected to the active ring for left and right sliding, and a locking member is connected between the limiting plate and the active ring.

[0014] Preferably, the butterfly plate clamping unit includes a circular plate distributed below the support ring, with a through hole in the middle of the circular plate. The upper end of the circular plate is connected to the lower end of the support ring for left and right sliding through two symmetrically arranged square plates, and a clamping group for clamping and fixing the butterfly plate is installed on the circular plate.

[0015] Preferably, the circular plate is provided with two mounting holes symmetrically arranged front and back, and a rotating shaft with a hollow structure is fixedly installed on the front and rear inner walls of the mounting holes. A U-shaped transmission plate is fixed to the lower end of the telescopic section of the synchronization rod, and the lower ends of the two vertical sections of the transmission plate are both arranged in the corresponding mounting holes and are rotatably connected to the corresponding rotating shaft.

[0016] Preferably, the clamping group includes two adjusting screws 2 that are symmetrically arranged front and back and are threadedly connected to the circular plate, and the adjusting screws 2 are inserted into the hollow structure of the corresponding rotating shaft. The opposite sides of the two adjusting screws 2 pass through the circular plate and are fixedly installed with clamping plates. The opposite sides of the two clamping plates are fixedly installed with insertion shafts, and a clamping block with a conical structure is fixedly installed between the outer side of the insertion shaft and the clamping plate.

[0017] Preferably, the lower side of the through hole is set as a flared structure, and two groups of elastic clamping rods arranged symmetrically on the left and right are installed on the circular plate for sliding up and down, and each group of clamping rods includes multiple elastic clamping rods evenly arranged front and back.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention positions the valve shaft hole of the valve body by setting a positioning group. The present invention ensures that the synchronization rod is always arranged vertically by setting a limit group. In the process of adjusting the inclination angle of the valve body and the butterfly plate, the connection hole of the butterfly plate and the mounting hole of the valve body are always vertically aligned, so that the valve body and the butterfly plate are aligned up and down, and the central axis of the valve body and the central axis of the butterfly plate are collinear, and the central axis of the valve body, the central axis of the butterfly plate and the rotation center line of the active ring are collinear. At the same time, the present invention synchronously adjusts the angle of the valve body clamping unit and the butterfly plate clamping unit through the driving unit, so that the inclination angle of the valve body and the inclination angle of the butterfly plate are the same, thereby increasing the correlation when grinding and repairing the sealing surface of the butterfly plate and the valve seat in the valve body, significantly reducing the cumulative error in subsequent assembly caused by independent repair of the sealing surfaces of the two, and ensuring that the sealing performance of the three-eccentric butterfly valve after repair meets the standards.

[0020] 2. The present invention sets a synchronization group to drive the clamping plate to clamp the upper end of the flange structure on the lower side of the valve body, so that the clamping plate can center and clamp the valve body of different sizes. At the same time, the present invention sets a butterfly plate clamping unit to clamp and fix butterfly plates of different sizes, thereby ensuring the maintenance efficiency of the three-eccentric butterfly valve.

[0021] 3. The present invention clamps and fixes the connecting hole of the butterfly plate by arranging a clamping block with a frustum structure, and makes the central axis of the clamping block and the central axis of the butterfly plate connecting hole collinear, and since the central axis of the clamping block and the rotating shaft are collinear, and the central axis of the rotating shaft is always located on the vertical axis of the synchronization rod, the central axis of the butterfly plate connecting hole is always located on the vertical axis of the synchronization rod, ensuring that the valve body and the butterfly plate are always aligned up and down, and by arranging multiple elastic clamping rods to elastically press the butterfly plate downward, the lower end face of the butterfly plate and the upper end face of the circular plate are made parallel, so that the inclination angle of the butterfly plate is consistent with the inclination angle of the circular plate, ensuring that the inclination angle of the butterfly plate is consistent with the inclination angle of the valve body, and finally the grinding and repair of the butterfly plate sealing surface and the valve seat sealing surface in the valve body are carried out synchronously. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention after the base, active ring and connecting plate are partially removed.

[0025] Figure 3 It is a cross-sectional view of the valve body clamping unit, the synchronous adjustment unit and the butterfly plate clamping unit of the present invention.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the elastic reset rod, the fastening plate and the matching block after a part of the synchronization plate is cut away.

[0027] Figure 5 It is a top view of the synchronizer ring and synchronizer block of the present invention.

[0028] Figure 6 It is a cross-sectional view of the synchronous adjustment unit and the butterfly plate clamping unit of the present invention.

[0029] Figure 7 This invention Figure 6 Enlarged view of point A.

[0030] Figure 8 It is a cross-sectional view of the valve body, valve seat and butterfly plate of a triple eccentric butterfly valve.

[0031] Figure 9 This is a state diagram of the valve body and butterfly plate being clamped by the present invention.

[0032] Figure 1: Base; 11: Active member; 12: Grinding group 1; 13: Mounting seat; 14: Grinding group 2; 2: Driving unit; 21: Active ring; 22: Adjusting group; 221: Adjusting block; 222: U-shaped rod; 223: Hydraulic rod; 224: Support plate; 3: Valve body clamping unit; 31: Support ring; 311: Connecting plate; 312: Displacement slider; 32: Synchronizing group; 321: Synchronizing plate; 322: Elastic reset rod; 323: Synchronizing ring; 324: Annular electric slider assembly; 325: Synchronizing block; 33: Fastening plate; 331: Matching block; 4 , synchronous adjustment unit; 41, synchronous rod; 411, transmission plate; 42, positioning group; 421, positioning sleeve; 422, connecting spring; 423, mounting rod; 424, threaded rod; 425, positioning rod; 43, limiting group; 431, connecting sleeve; 432, limiting plate; 433, locking plate; 434, locking pin; 5, butterfly plate clamping unit; 51, circular plate; 511, through hole; 512, rotating shaft; 513, elastic clamping rod; 52, square plate; 53, clamping group; 531, adjusting screw 2; 532, clamping plate; 533, plug shaft; 534, clamping block. DETAILED DESCRIPTION

[0033] The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the art or the product instructions shall be followed.

[0034] See Figure 1 A tool for repairing special petroleum valves includes a base 1, a driving unit 2 is installed in the middle of the upper end of the base 1, a valve body clamping unit 3 is installed on the driving unit 2, and a butterfly plate clamping unit 5 is installed on the valve body clamping unit 3 through a synchronous adjustment unit 4.

[0035] See Figure 1 and Figure 2 It should be noted that a grinding group 12 is installed on the right side of the upper end of the base 1 in the present invention, a mounting seat 13 is fixedly installed in the middle of the upper end of the base 1, and a grinding group 2 14 is installed on the right side of the upper end of the mounting seat 13. Both the grinding group 12 and the grinding group 2 14 adopt existing technologies. Both use high-speed rotating grinding tools (such as grinding wheels) to grind and repair the sealing surface of the triple-eccentric butterfly valve. Both the grinding group 12 and the grinding group 2 14 use a control system to accurately control the processing parameters such as the rotation speed, feed speed, and grinding depth of the corresponding grinding tools, thereby realizing precise grinding and repair of the sealing surface of the triple-eccentric butterfly valve.

[0036] The present invention is used to grind and repair the valve seat sealing surface and the butterfly plate sealing surface in the valve body of a triple-eccentric butterfly valve. The present invention can clamp and fix valve bodies and valve seats of different sizes and specifications, thereby ensuring the maintenance efficiency of the triple-eccentric butterfly valve. At the same time, the present invention can synchronously adjust the inclination angle of the valve seat and the butterfly plate, and ensure that the positions of the butterfly plate and the valve seat are aligned up and down, thereby making the center axis of the valve body and the center axis of the butterfly plate collinear, thereby linking the maintenance processes of the valve body and the butterfly plate sealing surfaces, significantly reducing the cumulative error in subsequent assembly caused by independent maintenance of the sealing surfaces of the two, and reducing the risk of substandard sealing performance due to cumulative errors exceeding the allowable range during final assembly.

[0037] Specifically, the operator first disassembles the three-eccentric butterfly valve in sequence, clamps and fixes the valve body through the valve body clamping unit 3, clamps and fixes the butterfly plate through the butterfly plate clamping unit 5, and then controls the drive unit 2 to adjust the inclination angle of the valve body through the valve body clamping unit 3. The valve body clamping unit 3 drives the butterfly plate clamping unit 5 to adjust the inclination angle of the butterfly plate, so that the valve body inclination angle and the butterfly plate inclination angle are both the angular eccentricity values ​​of the three-eccentric butterfly valve. At the same time, the synchronous adjustment unit 4 drives the butterfly plate clamping unit 5 to align the butterfly plate and the valve body up and down, so that the central axis of the butterfly plate and the central axis of the valve body are collinear, and the positions of the valve body and the butterfly plate are adjusted by controlling the drive unit 2, so that the central axis of the valve body and the central axis of the butterfly plate are collinear with the rotation center line of the drive unit 2.

[0038] Then control the grinding tool of grinding group 12 to move to the corresponding position of the sealing surface of the valve seat in the valve body, control the grinding tool of grinding group 2 14 to move to the corresponding position of the sealing surface of the butterfly plate, and accurately control the processing parameters of the corresponding grinding tools of grinding group 12 and grinding group 2 14, start grinding group 12 and grinding group 2 14, and at the same time start the drive unit 2 to drive the valve body and the butterfly plate to rotate with the rotation center line of the drive unit 2 as the reference, so as to realize the synchronous and precise grinding and repair of the valve seat sealing surface and the butterfly plate sealing surface in the valve body. When the grinding and repair of the valve seat sealing surface and the butterfly plate sealing surface in the valve body are completed, control the valve body clamping unit 3 to loosen the valve body and take out the valve body, control the butterfly plate clamping unit 5 to loosen the butterfly plate and take out the butterfly plate, and finally the operator assembles the repaired valve body and butterfly plate to complete the sealing surface repair of the three-eccentric butterfly valve.

[0039] It should be noted that the angular eccentricity value of the triple-eccentric butterfly valve is its inherent geometric design parameter. The center axis of the valve body and the butterfly plate can be measured by precision measuring tools (such as a micrometer), which is a necessary operating step when repairing the sealing surface of the existing triple-eccentric butterfly valve. In the present invention, the center axis of the valve body and the butterfly plate is measured using existing technology.

[0040] See Figure 1 The driving unit 2 includes an active ring 21 rotatably mounted on the upper end of the base 1, and an active part 11 is connected between the active ring 21 and the base 1. The valve body clamping unit 3 includes a support ring 31 set on the active ring 21 through an adjustment group 22, and a plurality of circumferentially evenly arranged fastening plates 33 are installed on the support ring 31 through a synchronization group 32.

[0041] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The synchronization group 32 includes a synchronization plate 321 radially slidably mounted on the upper end of the support ring 31 and corresponding to the fastening plate 33 one by one. A square hole is provided on the synchronization plate 321, and the fastening plate 33 is arranged in the corresponding square hole. The upper end of the fastening plate 33 is slidably connected to the corresponding square hole through an elastic reset rod 322. The fastening plate 33 is provided with two symmetrically arranged inclined holes. The end of the inclined hole close to the middle of the support ring 31 is inclined upward. A matching block 331 is slidably installed in the inclined hole, and the matching block 331 is fixedly installed in the corresponding square hole.

[0042] See Figure 3 and Figure 5 An annular hole is provided on the inner side of the support ring 31, and the synchronization group 32 also includes a synchronization ring 323 rotatably mounted in the annular hole. An annular electric slider assembly 324 is connected between the synchronization ring 323 and the support ring 31. An arc groove corresponding to the synchronization plate 321 is provided on the synchronization ring 323, and a synchronization block 325 is slidably installed in the arc groove. The upper end of the synchronization block 325 slides through the support ring 31 and is fixedly connected to the lower end of the corresponding synchronization plate 321. It should be noted that the two ends of the arc groove, one end is close to the center of the synchronization ring 323, and the other end is away from the center of the synchronization ring 323.

[0043] It should be noted that the active part 11 includes a gear ring fixedly mounted on the outside of the active ring 21 and located above the base 1. A gear is meshed and installed on the left side of the gear ring. The gear is fixedly connected to the output shaft of the motor fixedly mounted on the base 1, and the motor is set in a preset mounting groove on the base 1. The gear is driven to rotate by starting the motor, and the gear drives the active ring 21 to rotate through the gear ring.

[0044] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4、 Figure 5 and Figure 9 The driving unit 2 is used to adjust the inclination angle of the valve body and drive the valve body to rotate, and the valve body clamping unit 3 is used to clamp and fix the valve body; specifically, the valve body is first placed on the upper end of the support ring 31 and between multiple synchronous plates 321 in such a way that its valve shaft hole is located above the valve seat, and then the annular electric slider assembly 324 is started to drive the synchronous ring 323 to rotate, and the synchronous ring 323 drives the multiple synchronous plates 321 to move to the opposite side through the arc groove and the synchronous block 325, and the synchronous plate 321 drives the multiple fastening plates 33 to move to the opposite side. When the clamping plate 33 is pressed against the outside of the valve body and the synchronous plate 321 continues to move, the clamping plate 33 moves radially away from the valve body relative to the corresponding synchronous plate 321 under the blocking action of the valve body. At the same time, the matching block 331 drives the clamping plate 33 to move downward through the inclined hole and stretches the telescopic section of the elastic reset rod 322, so that the clamping plate 33 is clamped to the upper end of the flange structure on the lower side of the valve body, thereby achieving centering clamping and fixing of the valve body, so that the clamping plate 33 can clamp and fix valve bodies of different sizes and specifications, ensuring the maintenance efficiency of the three-eccentric butterfly valve.

[0045] The starting adjustment group 22 adjusts the inclination angle and left and right positions of the valve body through the support ring 31, so that the inclination angle of the valve body corresponds to the angle eccentricity value of the three-eccentric butterfly valve, and at the same time, the central axis of the valve body and the rotation center line of the active ring 21 are collinear, and the active ring 21 is driven to rotate by starting the active part 11. The active ring 21 drives the valve body to rotate through the adjustment group 22, so that the grinding group 12 can grind and repair the sealing surface of the valve seat in the valve body. When the grinding and repair of the valve seat sealing surface in the valve body is completed, the control annular electric slider assembly 324 drives the synchronous ring 323 to rotate, so that the synchronous ring 323 drives multiple fastening plates 33 to move to the opposite sides to the initial position. At the same time, under the cooperation of the matching block 331 and the inclined hole, the elastic reset rod 322 drives the fastening plate 33 to move relative to the corresponding synchronous plate 321 in the direction close to the middle of the support ring 31 to the initial position, so that the valve body can be removed.

[0046] See Figure 1 and Figure 2 The outer cylindrical surface of the support ring 31 is fixedly installed with two symmetrically arranged connecting plates 311. The lower end of the left connecting plate 311 is slidably installed with a give-way slider 312. The adjustment group 22 includes two symmetrically arranged adjusting blocks 221 slidably installed on the upper end of the active ring 21. Two U-shaped rods 222 symmetrically arranged front and back are fixedly installed between the two adjusting blocks 221. An adjusting screw 1 is connected between the right adjusting block 221 and the active ring 21. A hydraulic rod 223 is installed on the upper end of the left adjusting block 221. The upper end of the hydraulic rod 223 is hinged to the lower end of the give-way slider 312. A support plate 224 is fixedly installed on the upper end of the right adjusting block 221. The upper end of the support plate 224 is hinged to the lower end of the right connecting plate 311.

[0047] When the cam 224 is in the closed position, the cam 224 is in the closed position, and the cam 224 is in the closed position, so that the cam 224 is in the open position, and the cam 224 is in the closed position, so that the cam 224 is in the open position, and the cam 224 is in the closed position, so that the cam 224 is in the open position, and the cam 224 is in the open ...

[0048] See Figure 1 、 Figure 2 and Figure 3 The butterfly plate clamping unit 5 includes a circular plate 51 distributed below the support ring 31, with a through hole 511 opened in the middle of the circular plate 51. The upper end of the circular plate 51 is connected to the lower end of the support ring 31 for sliding left and right through two symmetrically arranged square plates 52. A clamping group 53 for clamping and fixing the butterfly plate is installed on the circular plate 51; wherein, there is a certain distance between the circular plate 51 and the hydraulic rod 223 and the support plate 224, so that the hydraulic rod 223 and the support plate 224 will not interfere with the rotation of the circular plate 51.

[0049] See Figure 1 、 Figure 2 、 Figure 3 and Figure 6 The synchronous adjustment unit 4 includes a synchronous rod 41 of a telescopic structure concentrically arranged in the support ring 31, a positioning group 42 is installed on the upper end of the synchronous rod 41, and a limited position group 43 is connected between the lower end of the synchronous rod 41 and the active ring 21.

[0050] See Figure 6 and Figure 7 Two mounting holes are symmetrically arranged front and back on the circular plate 51. A hollow rotating shaft 512 is fixedly installed on the front and rear inner walls of the mounting holes. A U-shaped transmission plate 411 is fixed to the lower end of the telescopic section of the synchronization rod 41. The lower ends of the two vertical sections of the transmission plate 411 are both set in the corresponding mounting holes and are rotatably connected to the corresponding rotating shaft 512.

[0051] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 and Figure 9The butterfly plate clamping unit 5 is used to clamp and fix the butterfly plate, and the synchronous adjustment unit 4 is used to make the center axis of the valve body and the center axis of the butterfly plate colinear; specifically, the connecting hole of the butterfly plate is placed at the corresponding position of the clamping group 53, and the end face of the butterfly plate is facing downward, the clamping group 53 is controlled to clamp and fix the butterfly plate, and the end face of the butterfly plate is parallel to the upper end face of the circular plate 51, and then the valve shaft hole of the valve body is positioned by the positioning group 42. When the support ring 31 is tilted at a certain angle, the support ring 31 drives the support ring 31 to tilt at a certain angle through the square plate 52, and under the action of the square plate 52, the inclination angles of the circular plate 51 and the support ring 31 are the same, so that the inclination angle of the butterfly plate is the same as the inclination angle of the valve body, so that the inclination angle of the butterfly plate also corresponds to the angular eccentricity value of the three-eccentric butterfly valve.

[0052] In the process of the support ring 31 driving the valve body to rotate, the valve shaft hole of the valve body drives the synchronization rod 41 to move left and right synchronously through the positioning group 42. Since the square plate 52 and the support ring 31 are slidably connected to each other, the lower end of the vertical section of the transmission plate 411 is rotatably connected to the rotating shaft 512 fixedly installed in the corresponding mounting hole, and the synchronization rod 41 is a telescopic structure, so that the synchronization rod 41 can drive the circular plate 51 to move left and right, so that the circular plate 51 drives the butterfly plate to move left and right through the clamping group 53. At the same time, the synchronization rod 41 is arranged vertically under the action of the limit group 43, so that the connecting hole of the butterfly plate and the mounting hole of the valve body are vertically aligned, so that the valve body and the butterfly plate are Align up and down, and then make the valve body center axis and the butterfly plate center axis collinear, so that the valve body center axis, the butterfly plate center axis and the active ring 21 rotation center line are collinear, thereby increasing the correlation when grinding and repairing the butterfly plate sealing surface and the valve seat sealing surface in the valve body, significantly eliminating error accumulation, and ensuring that the sealing performance of the three-eccentric butterfly valve after maintenance meets the standards. When the valve body rotates with the rotation center line of the active ring 21 as the reference, the support ring 31 drives the butterfly plate to rotate with the rotation center line of the active ring 21 as the reference through the square plate 52. When the grinding and repair of the butterfly plate sealing surface is completed, the control clamping group 53 is used to loosen the butterfly plate so that the butterfly plate can be taken out.

[0053] See Figure 6 and Figure 7 The clamping group 53 includes two adjusting screws 531 symmetrically arranged in front and back and threadedly connected to the circular plate 51, and the adjusting screws 531 are inserted into the hollow structure of the corresponding rotating shaft 512. The opposite sides of the two adjusting screws 531 pass through the circular plate 51 and are fixedly installed with a clamping plate 532. The opposite sides of the two clamping plates 532 are fixedly installed with an insertion shaft 533, and a clamping block 534 with a frustum structure is fixedly installed between the outer side of the insertion shaft 533 and the clamping plate 532; the lower side of the through hole 511 is set as a flared structure, and two groups of elastic clamping rod groups symmetrically arranged in the left and right are penetrated and installed on the circular plate 51 for sliding up and down. Each group of clamping rod groups includes a plurality of elastic clamping rods 513 evenly arranged in the front and back.

[0054] The two clamping plates 532 are arranged front and back and placed on opposite sides of the two plug shafts 533. Then, by rotating the adjusting screw 2 531, the two clamping plates 532 are driven to move to opposite sides. The clamping plates 532 drive the two plug shafts 533 to move to opposite sides and insert into the connecting holes of the butterfly plates. At the same time, multiple elastic clamping rods 513 elastically press the butterfly plates downward so that the lower end surface of the butterfly plates and the upper end surface of the circular plate 51 are parallel, thereby making the inclination angle of the butterfly plates consistent with the inclination angle of the circular plate 51, ensuring that the inclination angle of the butterfly plates and the inclination angle of the valve body are consistent. As the two clamping plates 532 continue to move to opposite sides, the clamping plates 532 drive the conical structure of the clamping block 534 to press tightly into the connecting holes, thereby being able to clamp and fix butterfly plates of different sizes, ensuring the maintenance efficiency of the three-eccentric butterfly valve. Since the central axes of the adjusting screw 2 531, the rotating shaft 512, the clamping plates 532 and the clamping blocks 534 are collinear, the connecting holes of the butterfly plates are always located on the vertical axis of the synchronization rod 41.

[0055] See Figure 2 、 Figure 3 and Figure 6 The positioning group 42 includes a positioning sleeve 421 that is slidably sleeved up and down on the outer side of the upper end of the synchronization rod 41. The upper end of the positioning sleeve 421 is connected to the synchronization rod 41 through a connecting spring 422. The front and rear sides of the positioning sleeve 421 are fixedly installed with mounting rods 423. The two mounting rods 423 are both threadedly connected to detachable threaded rods 424 on the opposite sides. Positioning rods 425 are both fixedly installed on the opposite sides of the two threaded rods 424.

[0056] See Figure 1 and Figure 6 The limiting group 43 includes a fixed sleeve arranged on the outer side of the lower end of the fixed end of the synchronization rod 41, and two L-shaped limiting plates 432 arranged symmetrically in front and back are fixedly installed on the outer side of the connecting sleeve 431. The limiting plate 432 is located at one end of the active ring 21 and is slidably connected to the active ring 21 left and right, and a locking piece is connected between the limiting plate 432 and the active ring 21; the locking piece includes a locking plate 433, which is fixedly mounted on the upper end of the active ring 21 and is located on the opposite sides of the vertical sections of the two limiting plates 432. A plurality of threaded holes evenly arranged left and right are opened on the locking plate 433, and a detachable locking pin 434 is threadedly connected in the threaded hole. Locking holes are opened at the positions corresponding to the locking pins 434 on the opposite sides of the vertical sections of the two limiting plates 432.

[0057] The positioning group 42 is used to position the valve shaft hole of the valve body, and the limit group 43 is used to ensure that the synchronization rod 41 is always arranged vertically. Specifically, first select the positioning rod 425 corresponding to the diameter of the valve shaft hole of the valve body, and the operator manually toggles the positioning sleeve 421 left and right to move the mounting rod 423 to the corresponding position of the valve shaft hole of the valve body, insert the positioning rod 425 into the valve shaft hole of the valve body, and screw the corresponding threaded rod 424 onto the mounting rod 423 to ensure that the valve shaft hole of the valve body is always located on the vertical axis of the synchronization rod 41. Since the connecting hole of the butterfly plate is always located On the vertical axis of the synchronization rod 41, the butterfly plate and the valve body are aligned up and down. When the support ring 31 and the valve body rotate with the hinge of the right connecting plate 311 and the support plate 224 as the reference, the valve body drives the positioning sleeve 421 to rotate synchronously through the positioning rod 425. The rotation of the positioning sleeve 421 can be decomposed into its up and down movement relative to the synchronization rod 41, and the left and right movement of the positioning sleeve 421. Since the positioning sleeve 421 is connected to the synchronization rod 41 through the connecting spring 422, the positioning sleeve 421 drives the synchronization rod 41 to move left and right during this process.

[0058] Under the action of the connecting sleeve 431 and the limit plate 432, the synchronization rod 41 is always arranged vertically, so that the synchronization rod 41 drives the synchronization rod 41 to drive the circular plate 51 to move left and right, and the butterfly plate and the valve body are always aligned up and down. After the inclination angle of the valve body and the butterfly plate is adjusted, the locking pin 434 is installed into the threaded hole corresponding to the locking hole of the limit plate 432 and inserted into the locking hole to lock the limit plate 432, thereby fixing the position of the butterfly plate, and the operator screws the positioning rod 425 to move the threaded rod 424 out of the installation rod 423 to prevent interference between the positioning rod 425 and the grinding tool of the grinding group 12 when the sealing surface of the valve seat in the valve body is ground and repaired.

[0059] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0060] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0061] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, integral or sliding connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0062] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tool for repairing special petroleum valves, including a base, characterized in that: A driving unit is installed in the middle of the upper end of the base, a valve body clamping unit is installed on the driving unit, and a butterfly plate clamping unit is installed on the valve body clamping unit through a synchronous adjustment unit; The driving unit includes a continuously rotating active ring rotatably mounted on the upper end of the base, and the valve body clamping unit includes a support ring mounted on the active ring via an adjustment group, and a plurality of circumferentially evenly arranged fastening plates are mounted on the support ring via a synchronization group. The synchronization group drives the plurality of fastening plates to fasten the valve body flange to achieve centering and fixing of the valve body. The synchronous adjustment unit includes a synchronous rod of a telescopic structure concentrically arranged in a support ring, a positioning group is installed on the upper end of the synchronous rod, a limit group is connected between the lower end of the synchronous rod and the active ring to arrange the synchronous rod vertically, and the lower end of the synchronous rod is connected to the butterfly plate clamping unit; The control adjustment group adjusts the center axis position of the valve seat's inclination angle through the support ring. The support ring drives the valve body clamping unit to synchronously adjust the inclination angle of the butterfly plate. The valve shaft hole of the valve body is positioned through the positioning group. The valve body makes the butterfly plate and the valve body's center axis collinear through the positioning group and the synchronization rod, which significantly reduces the cumulative error during the sealing surface maintenance process.

2. The tool for repairing special petroleum valves according to claim 1, characterized in that: The synchronization group includes a synchronization plate radially slidably mounted on the upper end of the support ring and corresponding to the fastening plate one by one. A square hole is provided on the synchronization plate, and the fastening plate is arranged in the corresponding square hole. The upper end of the fastening plate is slidably connected to the corresponding square hole through an elastic reset rod. Two symmetrically arranged inclined holes are provided on the fastening plate, and one end of the inclined hole close to the middle of the support ring is inclined upward. A matching block is slidably installed in the inclined hole, and the matching block is fixedly installed in the corresponding square hole.

3. The tool for repairing special petroleum valves according to claim 2, characterized in that: An annular hole is provided on the inner side of the support ring, and the synchronization group also includes a synchronization ring rotatably installed in the annular hole, an annular electric slider assembly is connected between the synchronization ring and the support ring, an arc groove is provided on the synchronization ring corresponding to the synchronization plate, a synchronization block is slidably installed in the arc groove, the upper end of the synchronization block slides through the support ring and is fixedly connected to the lower end of the corresponding synchronization plate.

4. The tool for repairing special petroleum valves according to claim 1, characterized in that: The outer cylindrical surface of the support ring is fixedly installed with two connecting plates arranged symmetrically on the left and right sides. The lower end of the left connecting plate is slidingly installed with a give way slider on the left and right sides. The continuous rotation of the active ring is realized by the active part connected between it and the base. The adjustment group includes two adjusting blocks arranged symmetrically on the left and right sides which are slidingly installed on the upper end of the active ring. Two U-shaped rods arranged symmetrically front and back are fixedly installed between the two adjusting blocks. An adjusting screw 1 is connected between the right adjusting block and the active ring. A hydraulic rod is installed on the upper end of the left adjusting block. The upper end of the hydraulic rod is hinged to the lower end of the give way slider. The upper end of the right adjusting block is fixedly installed with a support plate, and the upper end of the support plate is hinged to the lower end of the right connecting plate.

5. The tool for repairing special petroleum valves according to claim 1, characterized in that: The positioning group includes a positioning sleeve with upper and lower sliding sleeves arranged on the outside of the upper end of the synchronization rod. The upper end of the positioning sleeve is connected to the synchronization rod through a connecting spring. Mounting rods are fixedly installed on the front and rear sides of the positioning sleeve. The back sides of the two mounting rods are connected with detachable threaded rods through threads, and the back sides of the two threaded rods are fixedly installed with positioning rods.

6. The tool for repairing special petroleum valves according to claim 1, characterized in that: The limiting group includes a fixed sleeve arranged on the outer side of the lower end of the fixed end of the synchronization rod, and two L-shaped limiting plates arranged symmetrically front and back are fixedly installed on the outer side of the connecting sleeve. The limiting plate is located at one end of the active ring and is connected to the active ring for left and right sliding, and a locking piece is connected between the limiting plate and the active ring.

7. The tool for repairing special petroleum valves according to claim 1, characterized in that: The butterfly plate clamping unit includes a circular plate distributed below the support ring, with a through hole in the middle of the circular plate. The upper end of the circular plate is connected to the lower end of the support ring for left and right sliding through two symmetrically arranged square plates, and a clamping group for clamping and fixing the butterfly plate is installed on the circular plate.

8. The tool for repairing special petroleum valves according to claim 7, characterized in that: The circular plate is provided with two mounting holes arranged symmetrically front and back, and a rotating shaft with a hollow structure is fixedly installed on the front and rear inner walls of the mounting holes. A U-shaped transmission plate is fixed to the lower end of the telescopic section of the synchronization rod, and the lower ends of the two vertical sections of the transmission plate are both arranged in the corresponding mounting holes and are rotatably connected to the corresponding rotating shaft.

9. The tool for repairing special petroleum valves according to claim 8, characterized in that: The clamping group includes two adjusting screws 2 that are threadedly connected to the circular plate and arranged symmetrically in front and back, and the adjusting screws 2 are inserted into the hollow structure of the corresponding rotating shaft. The opposite sides of the two adjusting screws pass through the circular plate and are fixedly installed with clamping plates. The opposite sides of the two clamping plates are fixedly installed with plug-in shafts, and a clamping block with a frustum structure is fixedly installed between the outer side of the plug-in shaft and the clamping plate.

10. The tool for repairing special petroleum valves according to claim 7, characterized in that: The lower side of the through hole is provided with a flared structure, and two groups of elastic pressing rods arranged symmetrically on the left and right are installed on the circular plate for sliding up and down. Each group of pressing rods includes a plurality of elastic pressing rods evenly arranged front and back.

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