Butterfly valve production and processing equipment

Abstract

The butterfly valve production and machining equipment comprises an objective table fixed to a bottom plate, a rotary table is installed at the top of the objective table and used for clamping the inner side of a valve body, a center gear is rotationally installed in the objective table, and the outer circumferential face of the objective table is sleeved with a first lifting cylinder; the first lifting cylinder can move in the vertical direction relative to the fixed objective table, and a plurality of planetary gears are annularly distributed on the upper end face of the first lifting cylinder at equal intervals. The six planetary gears are rotationally installed on the pressing limiting plate, the drill rod is fixedly connected to the center of each planetary gear, the center gear is driven to rotate, the center gear drives all the planetary gears to rotate at a high speed, then all the drill rods drill the flange of the valve body at the same time, and the drilling efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of valve processing, and in particular to a butterfly valve production and processing equipment. Background Art

[0002] At present, butterfly valves need to be drilled during the production process (flanges are connected on both sides of the valve body for connecting pipes, and drilling refers to opening holes on the flanges). Before the drilling operation, the butterfly valve must be fixed as a whole, and then the drilling equipment is placed close to the flange to complete the drilling operation.

[0003] The traditional drilling operation is to manually fix the valve body and cooperate with the drilling equipment to complete the operation, but this operation method can easily lead to deviations in the position of the drilling hole, so a special tool is proposed to fix the valve body to ensure the efficiency and quality of the drilling. However, the drilling equipment can only complete one drilling operation at a time, and six holes usually need to be drilled on the flange, and a total of twelve holes need to be drilled on the flanges on both sides. If the existing drilling equipment is used to drill holes one by one, the processing efficiency will be greatly reduced, based on this, the present invention is proposed. Summary of the invention

[0004] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a butterfly valve production and processing equipment.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a butterfly valve production and processing equipment, including a loading platform fixed on a base plate, a turntable is installed on the top of the loading platform for clamping the inner side of the valve body, a central gear is rotatably installed inside the loading platform, a first lifting cylinder is sleeved on the outer circumferential surface of the loading platform, and the first lifting cylinder can move in the vertical direction relative to the fixed loading platform, and a plurality of planetary gears are distributed in an annular manner at equal intervals on the upper end surface of the first lifting cylinder, each planetary gear is rotatably connected to the first lifting cylinder, and a drill rod is fixedly connected to the center of each planetary gear in the vertical direction, a notch is formed on the outer circumferential surface of the loading platform at the position corresponding to each planetary gear, and all the planetary gears pass through the notch and mesh with the central gear inside the loading platform; a clamping limit plate is also arranged above the turntable, and during drilling operation, the clamping limit plate moves downward in the vertical direction to the top of the valve body to limit it.

[0006] Preferably, the turntable is rotatably mounted on the top of the stage.

[0007] Preferably, sleeves matching the number of drill rods are distributed in an annular manner on the top of the clamping limit plate, and a centering rod is slidably sleeved on the interior of each sleeve along its axial direction. The centering rod extends downward and passes through the bottom of the clamping limit plate, and the centering rod and the corresponding drill rod are coaxially arranged in the vertical direction. The end of the centering rod located inside the sleeve is connected to the top wall inside the sleeve through a first spring, and the diameter of the centering rod is the same as the diameter of the hole drilled by the drill rod on the valve body.

[0008] Preferably, the top of the clamping limit plate is integrally connected to a second lifting cylinder, and the center of the inner side of the second lifting cylinder is connected to a mounting plate through a limiting column. A plurality of inner clamping parts are annularly distributed on the outer circumferential surface of the mounting plate for applying force to the inner side of the valve body to limit the circumferential rotation of the valve body.

[0009] Preferably, each centering rod corresponds to an inner clamping piece on the mounting plate, and when the centering rod slides toward the inside of the sleeve in the vertical direction, the inner clamping piece on the mounting plate corresponding to the centering rod expands and contracts radially.

[0010] Preferably, the inner clamping member includes an air storage box fixedly embedded on the mounting plate, the interior of the air storage box is slidably connected to a sliding column along its length direction, one end of the sliding column extends to the outside of the air storage box and is fixedly connected to a clamping plate, and the other end is fixedly connected to a second piston plate, the second piston plate is adapted to the cross-section of the air storage box and is slidably connected thereto, a second spring is also sleeved on the outside of the sliding column, one end of the second spring is connected to the clamping plate, and the other end is connected to the air storage box, the second spring is used to drive the clamping plate and the air storage box to approach each other.

[0011] Preferably, the top of each sleeve is connected with an air guide tube, and the top of the inner side of the second lifting cylinder is fixed with a telescopic connecting tube matching the number of the air guide tubes in the vertical direction, each air guide tube extends radially toward the center of the second lifting cylinder and is connected with the top of the corresponding telescopic connecting tube, and the bottom of each telescopic connecting tube is connected with the air hole on the corresponding air storage box; One end of the centering rod facing the inside of the sleeve is fixedly connected to the first piston plate, one end of the first spring is connected to the first piston plate, and the other end is connected to the top wall of the sleeve, and the first spring is used to drive the centering rod to extend out of the sleeve; The mounting plate is slidably sleeved on the limiting column, and the bottom end of the limiting column is integrally formed with a stop plate connected to limit the mounting plate. A through hole matching the outer diameter of the limiting column is opened at the center of the mounting plate, and a limiting rib is formed on the inner wall of the through hole, and a rib groove matching the limiting rib is formed on the circumferential surface of the limiting column along its axial direction; In the initial state, the mounting plate is located at the bottom end of the limiting column, and the plane where all the inner clamping parts are located is located below the plane where the bottom end of the centering rod is located.

[0012] Preferably, the bottom of the loading platform is fixedly connected to two fixing rods in the vertical direction, the bottom ends of the fixing rods extend downward, pass through the first lifting cylinder and are fixedly connected to the bottom plate, and the first lifting cylinder is slidingly connected to the two fixing rods, and a second cylinder is installed at the top center of the bottom plate, and the piston end of the second cylinder is fixedly connected to the bottom of the first lifting cylinder.

[0013] Preferably, a top plate is also included, which is connected to the bottom plate by two brackets, a first cylinder is installed at the center of the top of the top plate, and the piston end of the first cylinder passes through the top plate and is fixedly connected to the center of the second lifting cylinder.

[0014] Preferably, a protective plate is connected above the second lifting cylinder via a short rod.

[0015] Compared with the prior art, the present invention provides a butterfly valve production and processing equipment, which has the following beneficial effects: The present invention has six planetary gears rotatably installed on the clamping limit plate, and a drill rod is fixedly connected to the center of each planetary gear. By driving the central gear to rotate, the central gear drives all the planetary gears to rotate at high speed, so that all the drill rods can drill holes on the flange of the valve body at the same time, greatly improving the drilling efficiency.

[0016] A centering rod is also provided on the clamping limit plate. When drilling a hole at the bottom of the valve body, the centering rod is blocked by the top of the valve body and retracts into the inside of the sleeve. When the centering rod enters the inside of the sleeve, the gas inside the sleeve enters the air storage box through the air guide pipe and the telescopic connecting pipe, exerting a force on the second piston plate, causing the clamping plate to move radially outward. The clamping plate gradually contacts the inner wall of the valve body and generates friction, so that the valve body is limited in the circumferential direction to ensure the quality of drilling.

[0017] When drilling a hole on the other side of the valve body, the centering rod is inserted into the hole that has been opened. At this time, the centering rod can limit the valve body in the circumferential direction and ensure that the holes opened on both sides of the valve body are coaxial. The clamping part does not move and there is no need to clamp and limit the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of the entire processing equipment in the embodiment; Figure 2 Schematic diagram of the distribution of various structures on and inside the stage in the embodiment; Figure 3 Schematic diagram of the installation of the stage on the bottom plate in the embodiment; Figure 4It is a schematic diagram of the installation of several drill rods on the first lifting cylinder in the embodiment; Figure 5 is a schematic diagram of a valve workpiece being processed on a stage in an embodiment; Figure 6 This is a schematic diagram of the installation of the pressing limit plate and the mounting plate at the bottom of the top plate in the embodiment; Figure 7 This is a schematic diagram of the distribution of various structures on the top of the second lifting cylinder in the embodiment; Figure 8 A schematic diagram of the distribution of several clamping members on the mounting plate in the embodiment; Fig. 9 Schematic diagram of the distribution of the telescopic connecting pipe inside the second lifting cylinder in the embodiment; Fig.10 It is a schematic diagram of the second lifting cylinder, the clamping and limiting plate and the sleeve after being cut away in the embodiment; Fig.11 A schematic diagram of the connection between the centering rod and the sleeve in the embodiment; Fig.12 Schematic diagram of the structure of the clamping member in the embodiment.

[0019] In the figure: 1. bracket; 2. top plate; 3. bottom plate; 4. first cylinder; 5. clamping limit plate; 6. first lifting cylinder; 7. loading platform; 8. turntable; 9. center gear; 10. planetary gear; 11. drill rod; 12. motor; 13. fixing rod; 14. second cylinder; 15. second lifting cylinder; 16. centering rod; 17. sleeve; 18. mounting plate; 19. inner clamp; 20. protective plate; 21. air guide tube; 22. limit rib; 23. limit column; 24. stop plate; 25. telescopic connecting pipe; 26. first spring; 27. first piston plate; 28. air storage box; 29. ​​clamping plate; 30. sliding column; 31. second spring; 32. second piston plate; 33. air hole; a. valve body. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0021] This embodiment provides a butterfly valve production and processing equipment, such as Figures 1 to 12 As shown, it includes a loading platform 7 fixed on the bottom plate 3, a turntable 8 is installed on the top of the loading platform 7 for clamping the inner side of the valve body a, and a central gear 9 is rotatably installed inside the loading platform 7. A first lifting cylinder 6 is sleeved on the outer circumferential surface of the loading platform 7, and the first lifting cylinder 6 can move in the vertical direction relative to the fixed loading platform 7. The upper end surface of the first lifting cylinder 6 is annularly distributed with a plurality of planetary gears 10 at equal intervals, and each planetary gear 10 is rotatably connected to the first lifting cylinder 6, and each planetary gear 10 A drill rod 11 is fixedly connected to the center in the vertical direction, and a notch is formed on the outer circumferential surface of the stage 7 at the position corresponding to each planetary gear 10. All the planetary gears 10 pass through the notch and mesh with the central gear 9 inside the stage 7; a top plate 2 is fixedly connected to the top of the bottom plate 3 through two brackets 1, and a first cylinder 4 is installed at the center of the top of the top plate 2. A clamping limit plate 5 is connected to the piston end of the first cylinder 4, and the clamping limit plate 5 moves downward in the vertical direction to the top of the valve body a through the first cylinder 4 to limit it.

[0022] When the above scheme is implemented, the valve body a to be processed is first placed on the turntable 8. The top of the turntable 8 is a conical structure, which is convenient for guiding the installation of the valve body a. All the drill rods 11 on the first lifting cylinder 6 are located below the turntable 8 in the initial position. After the valve body a is placed on the turntable 8, the first cylinder 4 drives the clamping limit plate 5 to move downward and press on the top of the valve body a. At this time, the valve body a cannot move in the vertical direction. A motor 12 is installed at the bottom of the stage 7. The motor 12 drives the central gear 9 inside the stage 7 to rotate, and all the planetary gears 10 mesh with the central gear 9 and then rotate synchronously. Since the diameter of the planetary gear 10 is smaller than that of the central gear 9, the meshing transmission of the central gear 9 and the planetary gear 10 increases the rotation speed of the planetary gear 10, and all the drill rods 1 1 is in a high-speed rotating state, and the bottom of the stage 7 is fixedly connected with two fixing rods 13 in the vertical direction. The bottom ends of the fixing rods 13 extend downward to penetrate the first lifting cylinder 6 and are fixedly connected to the bottom plate 3, and the first lifting cylinder 6 is slidably matched with the two fixing rods 13. A second cylinder 14 is installed at the top center of the bottom plate 3, and the piston end of the second cylinder 14 is fixedly connected to the bottom of the first lifting cylinder 6. At this time, the first lifting cylinder 6 is driven to move upward by the second cylinder 14 (because the height of the central gear 9 is greater than that of the planetary gear 10, the planetary gear 10 can always be in a meshing state with the central gear 9 during the upward movement), and all the drill rods 11 rotate at a high speed and move upward to contact the flange of the valve body a for drilling operation, and the synchronous action of the six drill rods 11 completes the drilling operation on one side of the valve body a at one time. It should be noted that, since a motor 12 is installed at the bottom of the loading platform 7, the rising height of the first lifting cylinder 6 needs to be further limited. When the bottom of the first lifting cylinder 6 moves upward to contact the motor 12, the drill rod 11 can just complete the drilling.

[0023] After the drilling operation on one side of the valve body a is completed, the drilling operation on the other side is required. However, when drilling on the other side, it is necessary to keep it coaxial with the completed drilling hole. In order to ensure the coaxiality of the drilling holes on both sides of the valve body a, in this embodiment, sleeves 17 matching the number of drill rods 11 are distributed in an annular manner on the top of the clamping limit plate 5, and a centering rod 16 is slidably sleeved inside each sleeve 17 along its axial direction. The centering rod 16 extends downward and passes through the bottom of the clamping limit plate 5, and the centering rod 16 and the corresponding drill rod 11 are kept coaxial in the vertical direction. The end of the centering rod 16 located inside the sleeve 17 is connected to the top wall inside the sleeve 17 through the first spring 26, and the diameter of the centering rod 16 is the same as the diameter of the hole drilled by the drill rod 11 on the valve body a. When the valve body a is drilled for the first time, the second cylinder 14 drives the clamping limit plate 5 to move downward close to the top of the valve body a. At this time, since the top of the valve body a has not been drilled yet, the centering rod 16 first contacts the valve body a and then gradually moves into the sleeve 17 until the bottom of the clamping limit plate 5 is completely in contact with the top of the valve body a. When it is necessary to drill a hole in the top of the valve body a, the valve body a is rotated 180° and reinstalled on the turntable 8. The clamping limit plate 5 is driven downward by the second cylinder 14 again to move close to the valve body a, and it is also necessary to drill a hole in the top of the valve body a. The installation of the valve body a on the turntable 8 needs to be adjusted so that the centering rod 16 can be aligned with the opened hole. After the centering rod 16 is fully inserted into the corresponding opening, the limit plate 5 is pressed and continues to move downward until it contacts the valve body a. At this time, the valve body a is fixed again, and the valve body a is not only fixed in the vertical direction, but also the horizontal rotation of the valve body a can be limited. Of course, in order to facilitate the rotation adjustment of the valve body a, it is preferred that the turntable 8 can be rotatably installed on the top of the stage 7.

[0024] Since the turntable 8 is rotatably mounted on the stage 7, when the valve body a is drilled for the first time, the clamping limit plate 5 only limits the valve body a in the vertical direction, and cannot limit the rotation of the valve body a in the horizontal direction. If the drill bit starts to drill the valve body a, the valve body a only needs to rotate slightly in the horizontal direction, which will affect the normal drilling and even the drilling quality. Therefore, it is necessary to limit the circumferential rotation of the valve body a. Based on this, the top of the clamping limit plate 5 is integrally formed with a second lifting cylinder 15, and the piston end of the first cylinder 4 passes through the top plate 2 and is fixedly connected to the center of the second lifting cylinder 15. The center of the inner side of the second lifting cylinder 15 is connected to the mounting plate 18 through a limiting column 23. A plurality of inner clamping members 19 are distributed in an annular manner on the outer circumferential surface of the mounting plate 18 for applying force to the inner side of the valve body a to limit the circumferential rotation of the valve body a.

[0025] Each centering rod 16 corresponds to an internal clamping piece 19 on the mounting plate 18, and as for the action of the internal clamping piece 19, in this embodiment, when the centering rod 16 slides vertically toward the inside of the sleeve 17, the internal clamping piece 19 on the mounting plate 18 corresponding to the centering rod 16 extends radially to clamp the inner wall of the valve body a.

[0026] Specifically, the inner clamping member 19 includes an air storage box 28 fixedly embedded on the mounting plate 18, and the interior of the air storage box 28 is slidably connected with a sliding column 30 along its length direction, and one end of the sliding column 30 extends to the outside of the air storage box 28 and is fixedly connected to the clamping plate 29, and the other end is fixedly connected to a second piston plate 32, which is adapted to the cross-section of the air storage box 28 and slidably connected therewith. The outside of the sliding column 30 is also sleeved with a second spring 31, and one end of the second spring 31 is connected to the clamping plate 29, and the other end is connected to the air storage box 28. The second spring 31 is used to drive the clamping plate 29 and the air storage box 28 to approach each other. By injecting gas into the air storage box 28, the second piston plate 32 is pushed to slide inside the air storage box 28 by the gas, so that the clamping plate 29 gradually approaches the inner wall of the valve body a, and finally the clamping plate 29 is pressed against the inner wall of the valve body a to clamp and fix it.

[0027] Furthermore, the top of each sleeve 17 is connected with an air pipe 21, and the top of the inner side of the second lifting cylinder 15 is fixed with telescopic connecting pipes 25 matching the number of the air pipes 21 in the vertical direction. Each air pipe 21 extends radially toward the center of the second lifting cylinder 15 and is connected with the top of the corresponding telescopic connecting pipe 25, and the bottom of each telescopic connecting pipe 25 is connected with the air hole 33 on the corresponding air storage box 28. The end of the centering rod 16 facing the inside of the sleeve 17 is fixedly connected with the first piston plate 27, one end of the first spring 26 is connected to the first piston plate 27, and the other end is connected to the top wall of the sleeve 17. The first spring 26 is used to drive the centering rod 16 to extend to the outside of the sleeve 17. The mounting plate 18 is slidably sleeved on the limiting column 23, and the bottom end of the limiting column 23 is integrally connected with a stop plate 24 for limiting the mounting plate 18. A through hole matching the outer diameter of the limiting column 23 is opened at the center of the mounting plate 18, and a limiting rib 22 is formed on the inner wall of the through hole, and a rib groove matching the limiting rib 22 is formed on the circumferential surface of the limiting column 23 along its axial direction. The mounting plate 18 can only slide in the axial direction relative to the limiting column 23.

[0028] Before the implementation of the above scheme, the positions of the mounting plate 18 and the inner clamping member 19 are first specifically defined. In the initial state, the mounting plate 18 is located at the bottom end of the limit column 23 under the action of gravity, and the plane where all the inner clamping members 19 are located is located below the plane where the bottom end of the centering rod 16 is located. When the first cylinder 4 drives the clamping limit plate 5 and the second lifting cylinder 15 to move downward, since the clamping plates 29 are located at the bottom, all the clamping plates 29 will first enter the inner side of the valve body a, and a small gap is left between the clamping plates 29 and the inner wall of the valve body a in the initial state to ensure that the clamping plates 29 can move downward smoothly (avoiding friction between the clamping plates 29 and the inner wall of the valve body a). When the centering rod 16 begins to contact the top of the valve body a, it will gradually move toward the inside of the sleeve 17 under the blocking action of the valve body a. At this time, the first piston plate 27 slides inside the sleeve 17. The gas inside the push sleeve 17 flows into the air guide pipe 21, and the gas enters the air storage box 28 through the air guide pipe 21 and the telescopic connecting pipe 25, thereby exerting a force on the second piston plate 32, causing the clamping plate 29 to move radially outward. As the centering rod 16 further moves into the interior of the sleeve 17, the clamping plate 29 moves radially outward and contacts the inner wall of the valve body a, and the force exerted on the inner wall of the valve body a gradually increases. At this time, the mounting plate 18 will remain stationary in the vertical direction under the reaction force of the inner clamping member 19 and the valve body a (because the friction between the inner clamping member 19 and the valve body a increases), and the clamping limit plate 5 and the second lifting cylinder 15 will continue to move downward under the action of the first cylinder 4. At this time, the mounting plate 18 and the limit column 23 maintain relative sliding, and the mounting plate 18 forms a limit with the limit column 23 in the circumferential direction, so the valve body a can be limited in the circumferential direction.

[0029] When the drilling is completed on the top of the valve body a, the first cylinder 4 drives the clamping limit plate 5 and the second lifting cylinder 15 to reset. At this time, the mounting plate 18 and the valve body a remain fixed, and the limit column 23 first slides upward relative to the mounting plate 18, and the centering rod 16 is separated from the sleeve 17 under the action of the first spring 26. At this time, the pressure of the gas inside the air storage box 28 will be reduced, and the clamping plate 29 will be reset under the action of the second spring 31. The clamping plate 29 loses the force on the inner wall of the valve body a, and when the bottom of the limit column 23 slides relative to the mounting plate 18 until the stop plate 24 contacts the mounting plate 18, the mounting plate 18 can be driven to move upward and reset together.

[0030] When drilling a hole at the bottom of the valve body a, since the hole has been drilled at the top, the limit plate 5 and the second lifting cylinder 15 are pressed and moved downward, and the turntable 8 is rotated to adjust the position of the valve body a. After the adjustment, the centering rod 16 will be directly inserted into the completed hole. At this time, the valve body a can achieve horizontal rotation limitation through the centering rod 16, and the internal clamping part 19 will not and does not need to move.

[0031] In addition, since several air ducts 21 are arranged above the second lifting cylinder 15, and the second lifting cylinder 15 is driven by the first cylinder 4 to move in the vertical direction, in order to avoid the air ducts 21 from colliding with the top plate 2 when the second lifting cylinder 15 moves upward, the present embodiment also has a protective plate 20 connected to the top of the second lifting cylinder 15 through a short rod. When the first cylinder 4 drives the second lifting cylinder 15 to move upward, the protective plate 20 first contacts with the top plate 2 to protect the air ducts 21.

[0032] In the description of the present invention, the terms "first", "second", "another", and "yet another" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A butterfly valve production and processing equipment, characterized by: The invention comprises a loading platform (7) fixed on a bottom plate (3), a turntable (8) is installed on the top of the loading platform (7) for clamping the inner side of the valve body (a), a central gear (9) is rotatably installed inside the loading platform (7), a first lifting cylinder (6) is sleeved on the outer circumferential surface of the loading platform (7), and the first lifting cylinder (6) can move in the vertical direction relative to the fixed loading platform (7), and a plurality of planetary gears (10) are distributed in an annular manner at equal intervals on the upper end surface of the first lifting cylinder (6), and each planetary gear (10) is It is rotatably connected to the first lifting cylinder (6), and a drill rod (11) is fixedly connected to the center of each planetary gear (10) in the vertical direction. A notch is formed on the outer circumferential surface of the loading platform (7) at a position corresponding to each planetary gear (10), and all the planetary gears (10) pass through the notch to mesh with the central gear (9) inside the loading platform (7). A clamping limit plate (5) is also provided above the rotating platform (8). During drilling operation, the clamping limit plate (5) moves downward in the vertical direction to the top of the valve body (a) to limit it.

2. The butterfly valve production and processing equipment according to claim 1 is characterized by: The turntable (8) is rotatably mounted on the top of the loading platform (7).

3. The butterfly valve production and processing equipment according to claim 2 is characterized by: The top of the clamping limit plate (5) is provided with sleeves (17) whose number matches the drill rods (11) in an annular manner. A centering rod (16) is slidably sleeved inside each sleeve (17) along its axial direction. The centering rod (16) extends downward to penetrate below the clamping limit plate (5). The centering rod (16) and the corresponding drill rod (11) are coaxially arranged in the vertical direction. One end of the centering rod (16) located inside the sleeve (17) is connected to the top wall inside the sleeve (17) via a first spring (26). The diameter of the centering rod (16) is the same as the diameter of the hole drilled by the drill rod (11) on the valve body (a).

4. The butterfly valve production and processing equipment according to claim 3 is characterized by: The top of the clamping limit plate (5) is integrally formed with a second lifting cylinder (15), and the center of the inner side of the second lifting cylinder (15) is connected to a mounting plate (18) via a limit column (23). A plurality of inner clamping members (19) are distributed in an annular manner on the outer circumferential surface of the mounting plate (18) for applying a force to the inner side of the valve body (a) to limit the rotation of the valve body (a) in the circumferential direction.

5. The butterfly valve production and processing equipment according to claim 4 is characterized in that: Each centering rod (16) corresponds to an inner clamping piece (19) on the mounting plate (18). When the centering rod (16) slides vertically toward the inside of the sleeve (17), the inner clamping piece (19) on the mounting plate (18) corresponding to the centering rod (16) expands and contracts radially.

6. The butterfly valve production and processing equipment according to claim 5 is characterized by: The inner clamping member (19) includes an air storage box (28) fixedly mounted on the mounting plate (18), the interior of the air storage box (28) is slidably connected to a sliding column (30) along its length direction, one end of the sliding column (30) extends to the outside of the air storage box (28) and is fixedly connected to the clamping plate (29), and the other end is fixedly connected to a second piston plate (32), the second piston plate (32) is adapted to the cross section of the air storage box (28) and is slidably connected thereto, and the exterior of the sliding column (30) is also sleeved with a second spring (31), one end of the second spring (31) is connected to the clamping plate (29), and the other end is connected to the air storage box (28), and the second spring (31) is used to drive the clamping plate (29) and the air storage box (28) to approach each other.

7. The butterfly valve production and processing equipment according to claim 6 is characterized by: The top of each sleeve (17) is connected to an air guide tube (21); a number of telescopic connecting tubes (25) matching the number of the air guide tubes (21) are fixed in a vertical direction to the top of the inner side of the second lifting cylinder (15); each air guide tube (21) extends radially toward the center of the second lifting cylinder (15) and is connected to the top of the corresponding telescopic connecting tube (25); and the bottom of each telescopic connecting tube (25) is connected to an air hole (33) on a corresponding air storage box (28); One end of the centering rod (16) facing the inside of the sleeve (17) is fixedly connected to the first piston plate (27); one end of the first spring (26) is connected to the first piston plate (27), and the other end is connected to the top wall of the sleeve (17); the first spring (26) is used to drive the centering rod (16) to extend to the outside of the sleeve (17); The mounting plate (18) is slidably sleeved on the limiting column (23); the bottom end of the limiting column (23) is integrally formed with a stop plate (24) for limiting the mounting plate (18); a through hole matching the outer diameter of the limiting column (23) is provided at the center of the mounting plate (18); a limiting rib (22) is formed on the inner wall of the through hole; and a rib groove matching the limiting rib (22) is formed on the circumferential surface of the limiting column (23) along its axial direction; In the initial state, the mounting plate (18) is located at the bottom end of the limiting column (23), and the plane where all the inner clamping members (19) are located is located below the plane where the bottom end of the centering rod (16) is located.

8. A butterfly valve production and processing equipment according to any one of claims 1 to 7, characterized in that: The bottom of the loading platform (7) is fixedly connected to two fixing rods (13) in the vertical direction. The bottom ends of the fixing rods (13) extend downwardly through the first lifting cylinder (6) and are fixedly connected to the bottom plate (3). The first lifting cylinder (6) is slidably connected to the two fixing rods (13). A second cylinder (14) is installed at the top center of the bottom plate (3). The piston end of the second cylinder (14) is fixedly connected to the bottom of the first lifting cylinder (6).

9. A butterfly valve production and processing equipment according to any one of claims 4 to 7, characterized in that: It also includes a top plate (2), the top plate (2) and the bottom plate (3) are connected via two brackets (1), a first cylinder (4) is installed at the center of the top of the top plate (2), and a piston end of the first cylinder (4) passes through the top plate (2) and is fixedly connected to the center of the second lifting cylinder (15).

10. The butterfly valve production and processing equipment according to claim 9, characterized in that: A protective plate (20) is connected above the second lifting cylinder (15) via a short rod.

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