A clamping device for disassembling and repairing a safety valve

Abstract

This utility model discloses a clamping device for disassembling and repairing a safety valve, including a fastening flange for fixing the device, a support frame fixedly mounted on the upper side of the fastening flange, and a mounting base mounted on the support frame. A left clamp is connected to the left side of the mounting base at a certain distance, and a right clamp is mounted on the upper side for clamping the safety valve body. A lifter is connected to the right side at a certain distance for vertically lifting the safety valve body. A gear transmission mechanism is installed in the mounting base to drive the left and right clamps. The input end of the gear transmission mechanism is connected to a lever, and the lever drives the gear transmission mechanism to control the clamping and releasing actions of the left and right clamps. This device has high stability, wide adaptability, and convenient operation. Through the coordinated action of the double clamps and the lifter, the safety valve body can be quickly positioned and stably clamped, reducing manual adjustment time.

Description

Technical Field

[0001] This utility model belongs to the technical field of valve repair equipment, specifically relating to a clamping device for disassembling and repairing a safety valve. Background Technology

[0002] As a critical protective device for pressure vessels, safety valves require regular disassembly and maintenance to ensure their sealing performance. Traditional maintenance methods often employ general-purpose clamps or manual fixation, which have the following drawbacks: 1. Poor clamping stability: general-purpose clamps are not compatible with the valve body shape, making them prone to slippage during clamping and leading to difficult maintenance operations; 2. Insufficient adaptability: they cannot accommodate safety valves of different sizes and irregular structures, requiring frequent clamp replacements; 3. High risk of damage: rigid clamping surfaces can easily scratch the outer surface of the valve body, affecting the sealing accuracy; 4. Non-adjustable angle: maintenance requires repeated disassembly and reassembly of the valve body to adjust its position, resulting in low efficiency. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a clamping device for disassembling and repairing safety valves, which has high stability, wide adaptability and convenient operation.

[0004] The technical solution adopted by this utility model is as follows: A clamping device for disassembling and repairing a safety valve includes a fastening flange for fixing the device, a support frame fixedly installed on the upper side of the fastening flange, a mounting base installed on the support frame, a left clamp connected at a certain distance on the left side of the mounting base, a right clamp installed on the upper side for clamping the safety valve body, a lifter connected at a certain distance on the right side for vertically lifting the safety valve body, a gear transmission mechanism installed in the mounting base for driving the left clamp and the right clamp, the input end of the gear transmission mechanism connected to a lever, and the lever drives the gear transmission mechanism to control the clamping and releasing actions of the left clamp and the right clamp.

[0005] Furthermore, the gear transmission mechanism includes a transmission gear one, a transmission gear two, and a central gear. The central gear is positioned between the transmission gear one and the transmission gear two. The transmission gear one and the transmission gear two mesh with the central gear. The central gear is connected to the lever. The transmission gear one and the transmission gear two respectively drive and connect to the left clamp and the right clamp.

[0006] Furthermore, both the left and right clamps include driven gear one, driven gear two, a mounting base, and symmetrically arranged connecting rod one, connecting rod two, and a support rod. Driven gear one and driven gear two are mounted on the mounting base via shafts and mesh with each other. The left clamp is provided with a driving gear that meshes with driven gear one. The driving gear is connected to driving gear one via a transmission rod. Driving gear two meshes with driven gear one of the right clamp. One end of connecting rod one on both sides is hinged to driven gear one and driven gear two respectively, and the other end of connecting rod one is hinged to the lower end of connecting rod two. One end of the support rod is hinged to the upper end of connecting rod two, and the other end is hinged to the mounting base. The upper end of connecting rod two extends inward at the hinge point to form a snap joint.

[0007] Furthermore, the handles are symmetrically arranged on the left and right sides of the mounting base, including an upper connecting rod and a lower connecting rod in a V-shape. The end of the upper connecting rod is connected to a central gear, and a handle is vertically fixed to the outside of the connection between the upper and lower connecting rods. The lower connecting rods are connected to each other through a connecting post.

[0008] Furthermore, the handle is equipped with a self-locking mechanism, which includes a spring piece located on the front side of the support frame. A protrusion is located on the upper side of the front end of the spring piece, and a locking pin is rotatably connected between the ends of the lower connecting rods on both sides. The handle drives the left clamp and the right clamp to open and close synchronously through a gear transmission mechanism. The locking pin of the handle can be locked inside the protrusion to fix the clamping state.

[0009] Furthermore, the lifter includes a hydraulic cylinder, with a support plate installed at the upper end of the piston rod of the hydraulic cylinder, and the hydraulic cylinder is connected to the mounting base through an L-shaped connecting bracket.

[0010] This utility model has the following beneficial effects: This utility model provides a clamping device for disassembling and repairing a safety valve. Through the coordinated action of a double clamp and a lifter, it achieves rapid positioning and stable clamping of the safety valve body, reducing manual adjustment time. The handle integrates transmission and self-locking functions, allowing clamping or releasing to be completed in a single operation, making it convenient to operate and significantly improving maintenance efficiency. The adjustable lifter design is highly adaptable and can be adapted to safety valves of different sizes and models, expanding the application scenarios. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the gear transmission mechanism of this utility model; Figure 3 This is a schematic diagram of the structure of the left clamp of this utility model; Figure 4 This is a front view of the left clamp of this utility model.

[0012] In the diagram: 1. Fastening flange; 2. Hand lever; 3. Left clamp; 4. Right clamp; 5. Lifter; 6. Safety valve body; 7. Mounting base; 8. Support frame; 9. Hydraulic cylinder; 10. Self-locking mechanism; 11. Gear transmission mechanism; 12. Transmission gear one; 13. Transmission gear two; 14. Center gear; 15. Driving gear; 16. Driven gear one; 17. Driven gear two; 18. Mounting base; 19. Connecting rod one; 20. Support rod; 21. Connecting rod two; 22. Transmission rod. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] like Figure 1 As shown, a clamping device for disassembling and repairing a safety valve according to this embodiment includes a fastening flange 1 for fixing the device. A support frame 8 is fixedly installed on the upper side of the fastening flange 1. A mounting base 7 is installed on the support frame 8. A left clamp 3 is connected to the left side of the mounting base 7 at a certain distance, and a right clamp 4 is installed on the upper side for clamping the safety valve body 6. A lifter 5 is connected to the right side at a certain distance for vertically lifting the safety valve body 6. A gear transmission mechanism 11 is installed inside the mounting base 7 to drive and connect the left clamp 3 and the right clamp 4. The input end of the gear transmission mechanism 11 is connected to a lever 2. The lever 2 drives the gear transmission mechanism 11 to control the clamping and releasing actions of the left clamp 3 and the right clamp 4.

[0015] like Figure 2 As shown, the gear transmission mechanism 11 includes a first transmission gear 12, a second transmission gear 13, and a central gear 14. The central gear 14 is disposed between the first transmission gear 12 and the second transmission gear 13. The first transmission gear 12 meshes with the second transmission gear 13 and the central gear 14. The central gear 14 is connected to the lever 2. The first transmission gear 12 and the second transmission gear 13 output torque.

[0016] like Figure 3 and Figure 4As shown, both the left clamp 3 and the right clamp 4 include a driven gear 16, a driven gear 17, a mounting base 18, and symmetrically arranged connecting rods 19, 21, and 20. The driven gear 17 meshes with the driven gear 16, and the driven gears 16 and 27 are mounted on the mounting base 18 via shafts. One end of the connecting rods 19 is hinged to the driven gears 16 and 27 respectively, and the other end of the connecting rods 19 is hinged to the lower end of the connecting rod 21. One end of the support rod 20 is hinged to the upper end of the connecting rod 21, and the other end is hinged to the mounting base 18. The upper hinge point of the connecting rod 21 extends inward to form a snap joint. The left clamp 3 includes a drive gear 15 mounted on a mounting base 18. The drive gear 15 meshes with a driven gear 16. A gear transmission mechanism 11 is connected to the left clamp 3 via a transmission rod 22. One end of the transmission rod 22 is coaxially mounted on the mounting base 18 and driven by the drive gear 15 of the left clamp 3. The other end of the transmission rod 22 is coaxially mounted in the mounting base 7 and driven by the driven gear 12. The second transmission gear 13 meshes with the driven gear 16 of the right clamp 4.

[0017] The inner side of the support rod 20 is equipped with an anti-slip rubber pad to enhance clamping friction. When the transmission rod 22 drives the drive gear 15 to rotate, through the gear meshing relationship, the drive gear 15 drives the meshing driven gear 16 to rotate in the opposite direction, or the transmission gear 13 drives the meshing driven gear 16 to rotate in the opposite direction. The driven gear 16 further drives the meshing driven gear 17 to rotate in the same direction. The rotation of the driven gear 16 and driven gear 17 drives the connecting rod 19, which is hinged to it, to perform eccentric circular motion, thereby pushing the connecting rod 21 to translate horizontally. The translation of the connecting rod 21 drives the two support rods 20 to rotate synchronously around the hinge point of the mounting base 18, retracting inward or opening outward. When the support rods 20 retract inward, the clamping mechanism completes the "clamping" action; when the support rods 20 open outward, the clamping mechanism completes the "releasing" action.

[0018] The lifter 5 includes a hydraulic cylinder 9. A support plate is provided at the upper end of the piston rod of the hydraulic cylinder 9, and the hydraulic cylinder 9 drives the support plate to achieve lifting and lowering. The hydraulic cylinder 9 is connected to the mounting base 7 through an L-shaped connecting frame. Specifically, the horizontal section of the connecting frame is connected to the mounting base 7, and the hydraulic cylinder 9 is fixedly connected to the side of the vertical section of the connecting frame. The hydraulic cylinder 9 mainly consists of a cylinder barrel, piston, piston rod, sealing device, and buffer device. The cylinder barrel is the main component of the hydraulic cylinder 9, providing space for the reciprocating motion of the piston. The piston reciprocates within the hydraulic cylinder 9, converting hydraulic energy into mechanical energy. It is equipped with a sealing device. The piston rod connects the piston and the support plate, transmitting the piston's thrust to the support plate. The sealing device's main function is to prevent hydraulic oil leakage and external impurities from entering the cylinder barrel. The buffer device is used to reduce the impact and inertial force of the piston at the end of its stroke. When the hydraulic pump presses hydraulic oil into the bottom oil chamber of the hydraulic cylinder 9 through the inlet, the hydraulic oil pushes the piston upward, and the piston rod extends to push the support plate. The lifting height can be adjusted through the control valve built into the hydraulic cylinder 9, and the safety valve body 6 can be precisely positioned.

[0019] The mounting base 7 is a rectangular frame, and the support frame 8 is fixed to the lower side of the mounting base 7 by bolts. The handle 2 is equipped with a self-locking mechanism 10, which is used to fix the position of the left clamp 3 and the right clamp 4 in the clamped state. Specifically, the handle 2 is symmetrically arranged on the left and right sides of the mounting base 7, including a V-shaped upper connecting rod and a lower connecting rod. The end of the upper connecting rod is connected to the central gear 14. The handle is vertically fixed to the outside of the connection between the upper connecting rod and the lower connecting rod. The lower connecting rods are connected by a connecting post. The self-locking mechanism 10 includes a spring piece set on the front side of the support frame 8. The upper side of the front end of the spring piece is provided with a protrusion. The ends of the two lower connecting rods are rotatably connected by a locking post. The handle 2 drives the left clamp 3 and the right clamp 4 to open and close synchronously through the gear transmission mechanism 11. The locking post of the handle 2 can be locked inside the protrusion to fix the clamped state.

[0020] In use, the operator first places the safety valve body 6 on the lifter 5, then adjusts the hydraulic cylinder 9 to raise the safety valve body 6 to the working height, then turns the lever 2 to drive the left clamp 3 and right clamp 4 to clamp the safety valve body 6 and fix it through the self-locking mechanism 10, then locks the fastening flange 1 and the hydraulic cylinder 9 to complete the all-round fixation of the safety valve body 6, after which it can be disassembled and repaired.

[0021] In this embodiment, the dual clamps and the lifter 5 work together to achieve rapid positioning and stable clamping of the safety valve body 6, reducing manual adjustment time. The lever 2 integrates transmission and self-locking functions, allowing for clamping or releasing actions in a single operation, making operation convenient and significantly improving maintenance efficiency. The adjustable lifter 5 is designed to adapt to safety valves of different sizes and models, offering strong adaptability and expanding application scenarios. The double fixation of the anti-slip rubber pad and the fastening flange 1 effectively prevents the valve body from slipping, ensuring high safety and reducing maintenance risks.

[0022] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A clamping device for disassembly repair of a safety valve, characterized by: It includes a fastening flange (1) for fixing the device, a support frame (8) is fixedly installed on the upper side of the fastening flange (1), a mounting base (7) is installed on the support frame (8), a left clamp (3) is connected at a certain distance on the left side of the mounting base (7), a right clamp (4) is installed on the upper side for clamping the safety valve body (6), and a lifter (5) is connected at a certain distance on the right side for vertically lifting the safety valve body (6). A gear transmission mechanism (11) is installed inside the mounting base (7) to drive the left clamp (3) and the right clamp (4). The input end of the gear transmission mechanism (11) is connected to the lever (2), and the lever (2) drives the gear transmission mechanism (11) to control the clamping and releasing actions of the left clamp (3) and the right clamp (4).

2. The safety valve disassembly and repair clamping device according to claim 1, characterized in that: The gear transmission mechanism (11) includes a transmission gear one (12), a transmission gear two (13) and a center gear (14). The center gear (14) is located between the transmission gear one (12) and the transmission gear two (13). The transmission gear one (12) and the transmission gear two (13) mesh with the center gear (14). The center gear (14) is connected to the lever (2). The transmission gear one (12) and the transmission gear two (13) are respectively connected to the left clamp (3) and the right clamp (4).

3. The safety valve disassembly and repair clamping device according to claim 2, characterized in that: Both the left clamp (3) and the right clamp (4) include driven gear one (16), driven gear two (17), mounting base (18), and symmetrically arranged connecting rod one (19), connecting rod two (21), and support rod (20). Driven gear one (16) and driven gear two (17) are mounted on the mounting base (18) through a shaft and mesh with each other. The left clamp (3) is provided with a driving gear (15) that meshes with driven gear one (16). The driving gear (15) is connected to the drive rod (22) through the transmission rod. The transmission gear 1 (12) is connected to the transmission gear 2 (13) and the driven gear 1 (16) of the right clamp (4). One end of the connecting rod 1 (19) on both sides is hinged to the driven gear 1 (16) and the driven gear 2 (17) respectively. The other end of the connecting rod 1 (19) is hinged to the lower end of the connecting rod 2 (21). One end of the support rod (20) is hinged to the upper end of the connecting rod 2 (21), and the other end is hinged to the mounting base (18). The upper hinge point of the connecting rod 2 (21) extends inward to form a snap joint.

4. The safety valve disassembly and repair clamping device according to claim 3, characterized in that: The handle (2) is symmetrically arranged on the left and right sides of the mounting base (7), including an upper connecting rod and a lower connecting rod in a V shape. The end of the upper connecting rod is connected to the central gear (14). The handle is vertically fixed on the outside of the connection between the upper connecting rod and the lower connecting rod. The lower connecting rods are connected by a connecting column.

5. The safety valve disassembly and repair clamping device according to claim 4, characterized in that: The lever (2) is provided with a self-locking mechanism (10). The self-locking mechanism (10) includes a spring piece set on the front side of the support frame (8). A protrusion is provided on the upper side of the front end of the spring piece. A locking pin is rotatably connected between the ends of the lower connecting rods on both sides. The lever (2) drives the left clamp (3) and the right clamp (4) to open and close synchronously through the gear transmission mechanism (11). The locking pin of the lever (2) can be locked inside the protrusion to fix the clamping state.

6. The clamp device for disassembly repair of a safety valve according to any one of claims 1 to 5, characterized in that: The lifting device (5) comprises a hydraulic cylinder (9), the upper end of the piston rod of the hydraulic cylinder (9) is provided with a supporting plate, and the hydraulic cylinder (9) is connected with the mounting base body (7) through an L-shaped connecting frame.

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