Gate valve rod straightening tool

Abstract

The utility model relates to the technical field of valve rod straightening, and discloses a gate valve rod straightening tool which comprises a valve rod, the outer wall of the valve rod is sleeved with a sleeve, the outer wall of the sleeve is fixedly connected with a support, and a fixing assembly is arranged in the sleeve. The fixing assembly comprises a bolt, the bolt is in threaded connection with the interior of the sleeve, an auxiliary assembly is arranged at one end of the bolt, a clamping plate is rotatably connected to one end of the bolt, the outer wall of the clamping plate is attached to the outer wall of the valve rod, a hydraulic rod is arranged on one side of the valve rod, and the output end of the hydraulic rod is fixedly connected with an ejector head. The butterfly knob drives the bolt to rotate, one end of the bolt drives the clamping plate to be attached to the outer wall of the valve rod through the limiting block, the sleeve is fixed to the outer wall of the valve rod through the clamping plate, and therefore the effect that valve rods of different sizes can be fixed conveniently is achieved; the valve rod straightening tool solves the problem that valve rods with different diameters cannot be quickly fixed and need to be supported by operators, and the practicability of the valve rod straightening tool is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve stem straightening technology, and in particular to a valve stem straightening tool for gate valves. Background Technology

[0002] Gate valves, widely used in pipeline transportation, industrial control, and municipal engineering, rely heavily on their stems as crucial components for controlling valve opening and closing. During long-term operation, transportation, or installation, stems are prone to deformation such as bending and misalignment, which can negatively impact the valve's sealing performance and operational stability. To improve gate valve maintenance efficiency and ensure reliable valve operation, a convenient and efficient stem straightening tool suitable for field or maintenance workshop use is urgently needed to enhance the accuracy and safety of straightening operations.

[0003] In existing technologies, valve stem straightening is often achieved through mechanical pressing, manual alignment, or the use of heated straightening devices. These structures typically include a support platform, a hydraulic system, or a fixing fixture. During operation, the valve stem is placed on the support structure, and external force is applied to restore it to a straight state. Some tooling utilizes threaded mechanisms for clamping, with the clamping structure manually adjusted to accommodate different valve stem models. Hydraulic systems achieve straightening through the thrust of a plunger rod, and their connection structures often rely on manual insertion or simple fixing.

[0004] However, existing straightening equipment generally has the following problems: when straightening valve stems of different diameters, traditional clamping methods lack a quick adaptive structure. Operators often need to manually adjust the positions of multiple clamps and require assistance from others to support the valve stem for fixation. This operation is cumbersome and inefficient, affecting the convenience and practicality of valve stem straightening operations. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a gate valve stem straightening fixture, which aims to improve the problem that valve stems of different diameters cannot be quickly fixed and require operator assistance when installing valve stem straightening equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a gate valve stem straightening fixture, including a valve stem, a sleeve is fitted on the outer wall of the valve stem, a bracket is fixedly connected to the outer wall of the sleeve, and a fixing component is provided inside the sleeve;

[0007] The fixing component includes a bolt, which is threaded inside the sleeve. An auxiliary component is provided at one end of the bolt, and a clamping plate is rotatably connected to the other end of the bolt. The outer wall of the clamping plate fits against the outer wall of the valve stem. A hydraulic rod is provided on one side of the valve stem, and a top head is fixedly connected to the output end of the hydraulic rod. A limit component is provided at the other end of the bolt.

[0008] As a further description of the above technical solution:

[0009] The auxiliary component includes a butterfly knob, one side of which is fixedly connected to the other end of a bolt.

[0010] As a further description of the above technical solution:

[0011] The limiting component includes a limiting block, one end of which is fixedly connected to one end of a bolt, and the limiting block is rotatably connected inside the clamping plate.

[0012] As a further description of the above technical solution:

[0013] The bracket has a slot inside, and one end of the hydraulic rod is fixedly connected to a connecting column, which is slidably connected inside the bracket.

[0014] As a further description of the above technical solution:

[0015] The connecting column is rotatably connected to a locking block, which engages with a locking slot.

[0016] As a further description of the above technical solution:

[0017] A connecting rod is rotatably connected to one side of the card block, and a limiting plate is rotatably connected to one end of the connecting rod. The limiting plate is slidably connected inside the connecting column.

[0018] As a further description of the above technical solution:

[0019] The connecting column is equipped with a telescopic rod inside, and a spring is sleeved on the outer wall of the telescopic rod.

[0020] As a further description of the above technical solution:

[0021] One end of the telescopic rod and the spring are both fixedly connected to one side of the limiting plate, and the other end of the telescopic rod and the spring are both fixedly connected inside the connecting column.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the butterfly knob first drives the bolt to rotate, so that one end of the bolt drives the clamp plate to fit against the outer wall of the valve stem through the limit block. The sleeve is then fixed to the outer wall of the valve stem through the clamp plate, which achieves the effect of facilitating the fixing of valve stems of different sizes. This solves the problem that valve stems of different diameters cannot be quickly fixed when installing valve stem straightening equipment, requiring the assistance of operators, and improves the practicality of the valve stem straightening fixture.

[0024] 2. In this utility model, one end of the hydraulic rod is inserted into the valve stem through a connecting column. Then, the connecting column is locked by a locking block embedded in the slot. The locking block is connected to the limiting plate through a connecting rod and is limited in the connecting column. It is supported by the tension of the spring, which achieves the effect of facilitating the assembly of the hydraulic rod. This solves the problem that the hydraulic rod is easily detached when the valve stem straightening fixture is placed directly on one side of the bracket, and improves the convenience of the valve stem straightening fixture. Attached Figure Description

[0025] Figure 1 This is a perspective view of a gate valve stem straightening fixture proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the top structure of a gate valve stem straightening fixture proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the clamping plate structure of a gate valve stem straightening fixture proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the internal structure of the bracket of a gate valve stem straightening fixture proposed in this utility model.

[0029] Figure 5 This is a schematic diagram of the internal structure of the connecting column of a gate valve stem straightening fixture proposed in this utility model.

[0030] Legend:

[0031] 1. Valve stem; 2. Bracket; 3. Sleeve; 4. Hydraulic rod; 5. Top head; 6. Bolt; 7. Clamping plate; 8. Limiting block; 9. Butterfly knob; 10. Slot; 11. Connecting column; 12. Locking block; 13. Connecting rod; 14. Limiting plate; 15. Telescopic rod; 16. Spring. Detailed Implementation

[0032] 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.

[0033] Reference Figures 1-3The present invention provides an embodiment of a gate valve stem straightening fixture, comprising a valve stem 1, which is a target structural component for straightening the gate valve. A sleeve 3 is fitted on the outer wall of the valve stem 1, which is used to externally position and support the valve stem 1, ensuring its stability during the straightening operation. A bracket 2 is fixedly connected to the outer wall of the sleeve 3, which provides the load-bearing structure of the entire fixture and helps to maintain the relatively fixed state of the straightening structure. A fixing component is provided inside the sleeve 3, which is used to reliably clamp the valve stem 1 inside the sleeve 3 to prevent it from shifting or sliding during straightening.

[0034] The fixing assembly includes bolt 6, which provides axial locking force and achieves clamping and releasing functions through rotation. Bolt 6 is threaded inside sleeve 3, and the threaded connection ensures stable adjustment and controllable clamping force between bolt 6 and sleeve 3. An auxiliary component is provided at one end of bolt 6 to simplify the operator's clamping action and improve adjustment efficiency. A clamping plate 7 is rotatably connected to one end of bolt 6. The clamping plate 7 is used to directly contact valve stem 1 and transmit the locking force of bolt 6 to form an effective clamp. The outer wall of clamping plate 7 fits against the outer wall of valve stem 1 to ensure tight clamping and improve the positioning accuracy of straightening operations. A hydraulic rod 4 is provided on one side of valve stem 1. The hydraulic rod 4 acts as a force-applying mechanism, providing continuous and uniform thrust to achieve straightening operations on bent parts. A mandrel 5 is fixedly connected to the output end of hydraulic rod 4. The mandrel 5 is used to accurately transmit the thrust of hydraulic rod 4. The bolt 6 is extended to the bent part of the valve stem 1 to improve straightening efficiency and stability. A limit component is provided at the other end of the bolt 6 to prevent the rotation amplitude of the clamping plate 7 from exceeding the safe range and improve the reliability of the mechanism operation. The auxiliary component includes a butterfly knob 9, which is used to conveniently control the rotation direction and amplitude of the bolt 6, and facilitates quick clamping or releasing operations. One side of the butterfly knob 9 is fixedly connected to the other end of the bolt 6. The rigid fixed connection ensures that the control action can be effectively transmitted to the bolt 6 body. The limit component includes a limit block 8, which sets the boundary for the rotation of the clamping plate 7 and improves the mechanical safety of the mechanism. One end of the limit block 8 is fixedly connected to one end of the bolt 6 to realize the coordinated movement of the limit block 8 and the bolt 6. The limit block 8 is rotatably connected inside the clamping plate 7. The rotational cooperation improves the control capability of the movable range of the clamping plate 7 and further stabilizes its position in the clamping state.

[0035] Reference Figure 4 and Figure 5The bracket 2 has a slot 10 inside, which is used to position and engage the hydraulic components, preventing the hydraulic structure from shifting during operation and improving straightening accuracy. One end of the hydraulic rod 4 is fixedly connected to a connecting post 11, which serves as the connecting component between the hydraulic rod 4 and the bracket 2, enabling the hydraulic rod 4 to be guided and installed and to transmit force within the bracket 2. The connecting post 11 is slidably connected inside the bracket 2, which facilitates the adjustment or disassembly of the hydraulic rod 4 within the bracket 2, improving structural flexibility and maintainability. The connecting column 11 is internally connected to a locking block 12, which is used to engage with the slot 10 to form a mechanical limit, thereby locking the connecting column 11 and preventing the hydraulic rod 4 from loosening or slipping. The engagement of the locking block 12 with the slot 10 ensures the stability of the locking block 12 during operation and enhances the reliability of the hydraulic connection. A connecting rod 13 is rotatably connected to one side of the locking block 12. The connecting rod 13 is used to transmit action signals to drive the locking block 12 to perform locking or releasing operations, forming a mechanical control closed loop. One end of the connecting rod 13 rotates. A limiting plate 14 is connected to the connecting rod 13, which restricts the range of movement of the connecting rod 13, preventing overtravel and improving the safety and reusability of the entire locking structure. The limiting plate 14 is slidably connected inside the connecting column 11. This sliding structure allows the limiting plate 14 a certain degree of freedom during the operation of the locking block 12, adapting to adjustment requirements at different positions. A telescopic rod 15 is provided inside the connecting column 11. The telescopic rod 15 acts as a return component for the connecting rod 13, allowing the locking block 12 to automatically return to its initial position after the external force is removed, improving assembly efficiency. A spring 16 is fitted on the outer wall of the telescopic rod 15. The spring 16 provides elastic restoring force and works in conjunction with the telescopic rod 15 to realize the self-resetting function of the locking block 12. One end of the telescopic rod 15 and the spring 16 are both fixedly connected to one side of the limiting plate 14. This fixed structure ensures that the force of the spring 16 can be effectively transmitted to the limiting plate 14, thereby pushing the locking block 12 to reset. The other end of the telescopic rod 15 and the spring 16 are both fixedly connected to the inside of the connecting column 11 to realize the stable connection of the entire elastic reset system and ensure the reset accuracy and structural consistency.

[0036] Working principle: When using this gate valve stem straightening fixture, firstly, when straightening the valve stem 1, both ends of the valve stem 1 are fitted onto the outer wall of the valve stem 1 through the sleeve 3. Then, the butterfly knob 9 drives the bolt 6 to rotate, so that one end of the bolt 6 drives the clamping plate 7 to fit against the outer wall of the valve stem 1 through the limit block 8. The sleeve 3 is fixed to the outer wall of the valve stem 1 through the clamping plate 7. Then, the output end of the hydraulic rod 4 drives the top head 5 to extend, so that one side of the top head 5 fits against the outer wall of the valve stem 1 for straightening, which achieves the effect of facilitating the fixing of valve stems 1 of different sizes.

[0037] When it is necessary to install the hydraulic rod 4 on the valve stem 1, one end of the hydraulic rod 4 is inserted into the valve stem 1 through the connecting post 11. Then, the connecting post 11 is locked in the slot 10 by the locking block 12. The locking block 12 is connected to the limiting plate 14 through the connecting rod 13 and is limited in the connecting post 11. It is supported by the tension of the spring 16, so that the locking block 12 can be stably fitted in the slot 10, which achieves the effect of facilitating the assembly of the hydraulic rod 4.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A straightening tool for a gate valve stem, comprising a stem (1), characterized in that: The outer wall of the valve rod (1) is sleeved with a sleeve (3), the outer wall of the sleeve (3) is fixedly connected with a support (2), and the inside of the sleeve (3) is provided with a fixing assembly; The fixing assembly comprises a bolt (6), the bolt (6) is threadedly connected in the inside of the sleeve (3), one end of the bolt (6) is provided with an auxiliary assembly, one end of the bolt (6) is rotatably connected with a clamping plate (7), the outer wall of the clamping plate (7) is attached to the outer wall of the valve rod (1), one side of the valve rod (1) is provided with a hydraulic rod (4), the output end of the hydraulic rod (4) is fixedly connected with a top head (5), and the other end of the bolt (6) is provided with a limiting assembly.

2. The straightening tool for a gate valve stem according to claim 1, wherein: The auxiliary assembly comprises a butterfly knob (9), one side of the butterfly knob (9) is fixedly connected with the other end of the bolt (6).

3. The straightening tool for a gate valve stem as claimed in claim 1, wherein: The limiting assembly comprises a limiting block (8), one end of the limiting block (8) is fixedly connected with one end of the bolt (6), and the limiting block (8) is rotatably connected in the inside of the clamping plate (7).

4. The straightening tool for a gate valve stem as claimed in claim 1, wherein: The inside of the support (2) is provided with a clamping groove (10), one end of the hydraulic rod (4) is fixedly connected with a connecting column (11), and the connecting column (11) is slidably connected in the inside of the support (2).

5. A straightening tool for a gate valve stem as defined in claim 4, wherein: The inside of the connecting column (11) is rotatably connected with a clamping block (12), and the clamping block (12) is embedded with the clamping groove (10).

6. A straightening tool for a gate valve stem as defined in claim 5, wherein: One side of the clamping block (12) is rotatably connected with a connecting rod (13), one end of the connecting rod (13) is rotatably connected with a limiting plate (14), and the limiting plate (14) is slidably connected in the inside of the connecting column (11).

7. The straightening tool for a gate valve stem as defined in claim 4, wherein: The inside of the connecting column (11) is provided with a telescopic rod (15), and the outer wall of the telescopic rod (15) is sleeved with a spring (16).

8. A straightening tool for a gate valve stem as defined in claim 7, wherein: One end of the telescopic rod (15) and the spring (16) is fixedly connected on one side of the limiting plate (14), and the other end of the telescopic rod (15) and the spring (16) is fixedly connected in the inside of the connecting column (11).

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