Clamp for machining a stop valve
By designing a three-dimensional clamping force field using longitudinal cylinder clamping and transverse gear-driven sliding plate, the problem of clamping offset caused by irregular structure in the machining of gate valves was solved, achieving high-precision and stable machining results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HARBIN ZHONGTONG VALVE FACTORY
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-09
AI Technical Summary
Existing gate valve machining fixtures are prone to misalignment during clamping due to the irregular structure of gate valves (such as flange end faces and curved flow channels), which affects machining accuracy and stability.
The design employs a three-dimensional clamping force field that combines longitudinal cylinder clamping with transverse gear-driven sliding plate, along with waist-shaped holes, V-shaped clamps, and elastic rubber pads to adapt to irregular structures of shut-off valves, enhancing adaptability and versatility.
It effectively solves the clamping offset problem of gate valves caused by curved surfaces or flange structures, is suitable for high-precision machining, and improves machining accuracy and stability.
Smart Images
Figure CN224333958U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gate valve processing technology, and in particular to a fixture for processing gate valves. Background Technology
[0002] A gate valve machining fixture is a specialized device used to fix and position the gate valve workpiece during machining to ensure its positional accuracy, machining stability and efficiency. The fixture is usually designed specifically for the structural characteristics of the gate valve (such as valve body shape, flange connection parts, valve seat sealing surface, etc.).
[0003] As a key component in the field of fluid control, the valve body, valve cover and other parts of the gate valve need to be positioned with high precision and clamping stability during the machining process. Existing fixtures mostly adopt three-jaw chucks or general vises, which have the problem of easy clamping deviation due to the irregular structure of the gate valve (such as flange end face, flow channel curved surface). Therefore, we propose a fixture for gate valve machining. Utility Model Content
[0004] In view of the problem that existing clamps used for processing gate valves are prone to misalignment due to the irregular structure of the gate valve (such as flange end face, flow channel curved surface), this utility model is proposed.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0006] A fixture for processing a gate valve includes a processing frame, the processing frame including a base plate, a support column vertically disposed on the base plate, and a top plate connected to the top of the support column;
[0007] A longitudinal clamping mechanism, comprising a cylinder mounted on the bottom of the top plate, wherein the piston rod of the cylinder passes through the top plate and an inverted L-shaped clamp is mounted on the extended portion;
[0008] A lateral clamping mechanism includes an inverted T-shaped slide plate symmetrically arranged and slidably mounted on the top plate. The inverted T-shaped slide plate is driven by a drive component mounted on the top plate, and a V-shaped clamp is mounted on the inverted T-shaped slide plate.
[0009] As a technical solution for a gate valve processing fixture according to the present invention, the base plate is provided with waist-shaped holes symmetrically distributed along the axial direction.
[0010] As a technical solution for a clamping fixture for processing a gate valve according to the present utility model, the top of the top plate is provided with an inverted T-shaped groove corresponding to the inverted T-shaped sliding plate, and the inverted T-shaped groove is adapted to the inverted T-shaped sliding plate, and the inverted T-shaped sliding plate is slidably installed in the top plate through the inverted T-shaped groove.
[0011] As a technical solution for a clamp for processing a stop valve according to the present invention, wherein: the top end of the inverted T-shaped slide plate has an integrally formed protrusion, and the V-shaped clamp is installed on the top of the protrusion.
[0012] As a technical solution for a clamping fixture for processing a stop valve according to the present utility model, wherein: a rectangular toothed rack is integrally formed on one bottom end of the inverted T-shaped sliding plate;
[0013] The driving component includes a stepper motor. A fixed base is mounted on the top plate. The stepper motor is mounted on the fixed base. A drive gear is mounted on the output shaft of the stepper motor. The drive gear meshes with the rectangular rack for transmission.
[0014] As a technical solution for a gate valve processing fixture according to the present utility model, a rubber pad is installed on the clamping surface of the inverted L-shaped fixture, and the contact surface between the rubber pad and the gate valve is provided with staggered hemispherical protrusions.
[0015] As a technical solution for a gate valve processing fixture according to the present invention, the opening angle of the V-shaped fixture is 90°-120°, and the inner surface of the V-shaped fixture is provided with a positioning groove that matches the curvature of the gate valve flange end face.
[0016] Compared with the prior art, the present invention has at least the following beneficial effects:
[0017] 1. This utility model constructs a three-dimensional clamping force field through the synergistic effect of longitudinal cylinder clamping and transverse gear-driven sliding plate, which can effectively solve the clamping offset problem caused by curved surface or flange structure of irregular gate valve, and is especially suitable for high-precision machining scenarios.
[0018] 2. This utility model, through the combined design of a waist-shaped hole, a V-shaped clamp, and an elastic rubber pad, enables the clamp to be adapted to a variety of shut-off valves, while enhancing its adaptability and versatility. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0020] Figure 1 This is a schematic diagram of the overall main structure of this utility model.
[0021] Figure 2 This is a schematic diagram of the overall bottom view of the present invention.
[0022] Figure 3 This is a schematic diagram of the inverted T-shaped slide plate and V-shaped clamp detachment processing frame structure of this utility model.
[0023] Figure 4 This is a schematic diagram of the assembly and connection structure of the inverted T-shaped slide and V-shaped clamp of this utility model.
[0024] Explanation of reference numerals in the attached figures:
[0025] In the diagram: 1. Base plate; 101. Waist-shaped hole; 2. Support column; 3. Top plate; 301. Inverted T-shaped slide groove; 4. Cylinder; 5. Inverted L-shaped clamp; 6. Rubber pad; 7. Inverted T-shaped slide plate; 701. Protrusion; 702. Rectangular rack; 8. V-shaped clamp; 9. Stepper motor; 10. Fixture; 11. Drive gear. Detailed Implementation
[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0027] Reference Figures 1-4 A fixture for processing a gate valve is provided. The fixture includes a processing frame, which includes a base plate 1, a support column 2 vertically disposed on the base plate 1, and a top plate 3 connected to the top of the support column 2.
[0028] The longitudinal clamping mechanism includes a cylinder 4 installed on the bottom of the top plate 3. The piston rod of the cylinder 4 passes through the top plate 3, and an inverted L-shaped clamp 5 is installed on the extended part.
[0029] The lateral clamping mechanism includes an inverted T-shaped slide plate 7 symmetrically arranged and slidably mounted on the top plate 3. The inverted T-shaped slide plate 7 is driven by a drive component mounted on the top plate 3. A V-shaped clamp 8 is mounted on the inverted T-shaped slide plate 7. In application, the longitudinal clamping mechanism drives the inverted L-shaped clamp 5 through the cylinder 4 to achieve adaptive clamping in the vertical direction. The lateral clamping mechanism provides horizontal bidirectional fixation through the symmetrically sliding inverted T-shaped slide plate 7 and V-shaped clamp 8. The two together form a three-dimensional clamping system, which can adapt to the irregular structure of the shut-off valve of different sizes and avoid the offset problem caused by the single clamping direction of traditional clamps.
[0030] Reference Figure 1 and Figure 2 The base plate 1 is provided with waist-shaped holes 101 symmetrically distributed along the axial direction. In application, the waist-shaped holes 101 on the base plate 1 allow the overall position of the fixture to be flexibly adjusted in the axial direction, which is convenient to adapt to the worktable installation requirements of different processing equipment and enhances the versatility of the fixture.
[0031] Reference Figure 1 , Figure 3 as well as Figure 4 The top of the top plate 3 is provided with an inverted T-shaped groove 301 corresponding to the inverted T-shaped slide plate 7, and the inverted T-shaped groove 301 is adapted to the inverted T-shaped slide plate 7. The inverted T-shaped slide plate 7 is slidably installed in the top plate 3 through the inverted T-shaped groove 301. In application, the cooperative design of the inverted T-shaped groove 301 and the inverted T-shaped slide plate 7 improves the sliding stability of the lateral clamping mechanism and reduces vibration interference.
[0032] Reference Figure 3 and Figure 4 The inverted T-shaped slide plate 7 has an integrally formed protrusion 701 on one end of its top, and the V-shaped clamp 8 is installed on the top of the protrusion 701. In application, the protrusion 701 makes the installation position of the V-shaped clamp 8 closer to the clamping center, thereby enhancing the clamping force transmission efficiency.
[0033] Reference Figures 2-4 The bottom end of the inverted T-shaped skateboard 7 has an integrally formed rectangular toothed rack 702;
[0034] The driving components include a stepper motor 9, a fixed base 10 mounted on the top plate 3, and a drive gear 11 mounted on the output shaft of the stepper motor 9. The drive gear 11 meshes with the rectangular rack 702 for transmission. In application, the stepper motor 9, together with the drive gear 11 and the rectangular rack 702, achieves high-precision synchronous control, ensuring symmetrical movement of the two side slides and avoiding tilting or displacement of the shut-off valve due to uneven clamping force.
[0035] Reference Figure 1 and Figure 3 A rubber pad 6 is installed on the clamping surface of the inverted L-shaped fixture 5. The contact surface between the rubber pad 6 and the shut-off valve is provided with staggered hemispherical protrusions. In application, the hemispherical protrusions of the rubber pad 6 increase the friction and prevent the workpiece from slipping during clamping.
[0036] Reference Figure 1 and Figure 3 The V-shaped clamp 8 has an opening angle of 90°-120°, and the inner surface of the V-shaped clamp 8 is provided with a positioning groove that matches the curvature of the end face of the gate valve flange. In application, the opening angle and positioning groove design of the V-shaped clamp 8 are designed for the characteristics of the end face of the gate valve flange to achieve curved surface fitting and positioning, which can improve the machining accuracy.
[0037] The working principle of this utility model is as follows: The gate valve to be processed is placed on the top plate 3, and then the stepper motor 9 fixed on the fixed base 10 is started. At this time, the output shaft of the stepper motor 9 drives the drive gear 11 to rotate. The drive gear 11 drives the rectangular rack 702 on the inverted T-shaped slide plate 7 to mesh and transmit power. The inverted T-shaped slide plate 7 drives the V-shaped clamp 8 to move towards the gate valve along the inner cavity of the inverted T-shaped slide groove 301 until the V-shaped clamp 8 clamps and fixes the gate valve. The positioning groove matches the arc of the gate valve flange end face to achieve lateral clamping of the gate valve. Then, the cylinder 4 fixed on the top plate 3 is started. At this time, the piston rod of the cylinder 4 drives the inverted L-shaped clamp 5 to move towards the gate valve until the inverted L-shaped clamp 5 clamps the gate valve longitudinally to achieve longitudinal clamping of the gate valve, thereby forming a three-dimensional clamping force field. At the same time, it effectively solves the clamping offset problem caused by the curved surface or flange structure of the irregular gate valve, and is especially suitable for high-precision processing scenarios.
[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A fixture for machining a gate valve, characterized in that: include: The processing frame includes a base plate (1), a support column (2) vertically arranged on the base plate (1), and a top plate (3) connected to the top of the support column (2). The longitudinal clamping mechanism includes a cylinder (4) installed on the bottom of the top plate (3), the piston rod of the cylinder (4) passes through the top plate (3), and an inverted L-shaped clamp (5) is installed on the extended part; A transverse clamping mechanism includes an inverted T-shaped slide plate (7) symmetrically arranged and slidably mounted on the top plate (3). The inverted T-shaped slide plate (7) is driven by a drive member mounted on the top plate (3). A V-shaped clamp (8) is mounted on the inverted T-shaped slide plate (7).
2. The fixture for machining a gate valve according to claim 1, characterized in that: The base plate (1) is provided with waist-shaped holes (101) symmetrically distributed along the axial direction.
3. The fixture for machining a gate valve according to claim 1, characterized in that: The top of the top plate (3) is provided with an inverted T-shaped groove (301) corresponding to the inverted T-shaped slide plate (7), and the inverted T-shaped groove (301) is adapted to the inverted T-shaped slide plate (7). The inverted T-shaped slide plate (7) is slidably installed in the top plate (3) through the inverted T-shaped groove (301).
4. The fixture for machining a gate valve according to claim 3, characterized in that: The inverted T-shaped slide (7) has an integrally formed protrusion (701) at one end of its top, and the V-shaped clamp (8) is mounted on the top of the protrusion (701).
5. The fixture for machining a gate valve according to claim 3, characterized in that: The inverted T-shaped skateboard (7) has an integrally formed rectangular toothed rack (702) at one end of its bottom. The driving component includes a stepper motor (9), a fixed base (10) is mounted on the top plate (3), the stepper motor (9) is mounted on the fixed base (10), and a drive gear (11) is mounted on the output shaft of the stepper motor (9). The drive gear (11) meshes with the rectangular rack (702) for transmission.
6. The fixture for machining a gate valve according to claim 1, characterized in that: The inverted L-shaped clamp (5) has a rubber pad (6) installed on its clamping surface, and the contact surface between the rubber pad (6) and the shut-off valve has staggered hemispherical protrusions.
7. The fixture for machining a gate valve according to claim 1, characterized in that: The opening angle of the V-shaped clamp (8) is 90°-120°, and the inner surface of the V-shaped clamp (8) is provided with a positioning groove that matches the curvature of the flange end face of the gate valve.