Valve body clamping tool

Abstract

The utility model belongs to the technical field of clamping tools, and particularly relates to a valve body clamping tool which comprises an outer shell, a driving mechanism is arranged in the outer shell, at least three clamping pieces are arranged on the top face of the outer shell, the multiple clamping pieces are arranged in the circumferential direction at equal intervals, and the multiple clamping pieces penetrate into the outer shell and are in transmission connection with the driving mechanism. The top face of the outer shell is fixedly connected with a plurality of pressing structures, the pressing structures are arranged in an adjustable mode, the multiple pressing structures are arranged in the circumferential direction at equal intervals, and the pressing structures and the clamping pieces are arranged in a staggered mode. Axis positioning of the valve body is achieved through synchronous movement of the multiple clamping pieces, the valve body does not need to be positioned through a positioning block, the pressing structure can be adjusted according to the valve bodies of different specifications, therefore, the valve bodies of different specifications can be clamped, the applicability is higher, the valve bodies of different specifications do not need to be replaced when machined, and the machining efficiency is improved. Therefore, the machining efficiency of the valve body is improved, and the machining cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of clamping fixture technology, and in particular relates to a valve body clamping fixture. Background Technology

[0002] The valve body is a major component of a valve; different mechanical manufacturing methods are used depending on the pressure rating, such as casting and forging. Clamping fixtures are required to hold the valve body in place during machining.

[0003] Existing technologies disclose clamping fixtures for valve body processing. However, these clamping fixtures can only clamp valve bodies of a specific diameter and cannot clamp valve bodies of different specifications, resulting in low applicability. Therefore, a valve body clamping fixture is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a valve body clamping fixture to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] A valve body clamping fixture includes: an outer shell with a drive mechanism inside; at least three clamping members on the top surface of the outer shell; multiple clamping members are circumferentially spaced and inserted into the outer shell and connected to the drive mechanism; multiple pressing structures are fixedly connected to the top surface of the outer shell, the pressing structures are adjustable, and the pressing structures are circumferentially spaced and staggered with the clamping members.

[0007] In a valve body clamping fixture of this utility model, the outer shell includes a top plate, and the clamping structure is provided with a plurality of straight slide grooves. The plurality of straight slide grooves are circumferentially spaced at equal intervals. The axis of the straight slide grooves coincides with the diameter of the top plate. A housing is coaxially fixed to the bottom surface of the top plate, and the driving mechanism is disposed in the housing.

[0008] In a valve body clamping fixture of this utility model, the driving mechanism includes a driving plate, which is horizontally disposed inside the housing. The driving plate has multiple arc-shaped grooves evenly spaced circumferentially. A worm gear is coaxially fixed to the driving plate. The top and bottom ends of the worm gear are coaxially rotatably connected to the top plate and the housing, respectively. The worm gear meshes with a worm, which is rotatably connected to the housing through a bearing seat. One end of the worm is coaxially fixed to the output shaft of a driving motor, and the driving motor is fixed to the inner side wall of the housing.

[0009] In a valve body clamping fixture of this utility model, the clamping component includes a movable rod, the bottom end of which is slidably connected to a slide rail, the slide rail being fixed to the inner bottom wall of the housing, the top end of which is slidably connected to a straight slide groove, a round rod being provided in the middle of the movable rod, the round rod being slidably connected to an arc-shaped slide groove, and the top end of the movable rod passing through the top plate and being rotatably connected to a clamping block via a pin.

[0010] In a valve body clamping fixture of this utility model, the clamping structure includes a sliding shell, which is fixedly connected to the top plate. The top opening of the sliding shell is flush with the top surface of the top plate. A lifting rod is vertically slidably connected inside the sliding shell. A second screw is threadedly connected to the lifting rod. The bottom end of the second screw is rotatably connected to the bottom wall of the sliding shell. The top end of the second screw protrudes from the lifting rod and is fixedly connected to a knob. A clamping rod is provided on the part of the lifting rod that protrudes from the sliding shell. The clamping rod is horizontally arranged.

[0011] In a valve body clamping fixture of this utility model, mounting grooves are provided on the opposite side walls of the lifting rod, and a through groove is provided on the clamping rod. The opposite side walls of the through groove are slidably connected to the two mounting grooves respectively. One end of the clamping rod is threadedly connected to a first screw, one end of the first screw is rotatably connected to the lifting rod, and the other end of the first screw passes through the clamping rod.

[0012] In a valve body clamping fixture of the present invention, the top plate is provided with a plurality of mounting holes at equal intervals in the circumferential direction, the mounting holes being close to the outer edge of the top plate and located outside the housing.

[0013] Compared with the prior art, the present invention has the following advantages and technical effects:

[0014] When using the valve body clamping fixture of this utility model, the valve body is placed between multiple clamping parts above the outer shell. The clamping parts are driven to move synchronously towards the center of the outer shell by the driving mechanism, thereby clamping the valve body. Then, the valve body is pressed by the pressing structure to achieve the clamping of the valve body.

[0015] In this invention, the valve body is positioned axially by the synchronous movement of multiple clamping components, eliminating the need for a positioning block to position the valve body. Furthermore, the clamping structure can be adjusted according to different valve body specifications, thus enabling clamping of valve bodies of different specifications. This provides greater applicability, and there is no need to replace valve bodies when processing different specifications, thereby improving the processing efficiency of the valve body and reducing processing costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in 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.

[0017] Figure 1 This is a top view of the present invention;

[0018] Figure 2 for Figure 1 AA section view in the middle;

[0019] Figure 3 This is a top view of the drive board in this utility model;

[0020] Figure 4 This is a front view of the clamping structure in this utility model;

[0021] Figure 5 This is a left view of the clamping structure in this utility model;

[0022] The components are as follows: 1. Top plate; 2. Mounting hole; 3. Straight groove; 4. Clamping block; 5. Pin; 6. First screw; 7. Pressing rod; 8. Knob; 9. Lifting rod; 10. Housing; 11. Slide rail; 12. Moving rod; 13. Drive plate; 14. Worm gear; 15. Shaft seat; 16. Worm; 17. Drive motor; 18. Round rod; 19. Arc-shaped groove; 20. Sliding shell; 21. Second screw. Detailed Implementation

[0023] 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.

[0024] Some definitions: A "valve" is a device used in fluid systems to control the direction, pressure, and flow rate of a fluid. A valve is a device that allows the medium (liquid, gas, powder) within piping and equipment to flow or stop, and can control its flow rate.

[0025] The material of the valve body is selected according to different process media.

[0026] Commonly used materials include: cast iron, cast steel, stainless steel, carbon steel, plastic, copper, etc.

[0027] Tooling, also known as process equipment, refers to the general term for all tools used in the manufacturing process. This includes cutting tools, fixtures, molds, measuring tools, inspection tools, auxiliary tools, fitter's tools, and workstation equipment. Tooling is its common abbreviation.

[0028] Clamping fixtures, also known as tooling fixtures, are devices used to clamp workpieces (or guide cutting tools), as the name suggests.

[0029] A fixture is a process device used during machining to quickly secure a workpiece and maintain the correct relative position of the machine tool, cutting tool, and workpiece. In other words, workholding fixtures are an indispensable component of machining. Driven by the development of machine tool technology towards high speed, high efficiency, precision, composite, intelligent, and environmentally friendly directions, fixture technology is developing towards high precision, high efficiency, modularity, combination, versatility, and economy.

[0030] A fixture, also known as a clamp, is broadly defined as any device used to quickly, conveniently, and safely install a workpiece during any step of a manufacturing process. Examples include welding fixtures, inspection fixtures, assembly fixtures, and machine tool fixtures. Machine tool fixtures are the most common and are often simply referred to as fixtures.

[0031] When machining a workpiece on a machine tool, in order to ensure that the surface of the workpiece meets the technical requirements such as the dimensions, geometry, and relative positional accuracy with other surfaces specified in the drawing, the workpiece must be mounted (positioned) and clamped (tightened) before machining.

[0032] The application of machine tool fixtures is beneficial for ensuring the machining accuracy of workpieces and stabilizing product quality; it is beneficial for improving labor productivity and reducing costs; it is beneficial for improving workers' working conditions and ensuring safe production; and it is beneficial for expanding the process range of machine tools and realizing "one machine for multiple uses".

[0033] A fixture typically consists of positioning elements (which determine the correct position of the workpiece in the fixture), clamping devices, tool setting and guiding elements (which determine the relative position of the tool and the workpiece or guide the direction of the tool), indexing devices (which enable the workpiece to complete the machining of several stations in one setup, and there are two types: rotary indexing devices and linear indexing devices), connecting elements, and fixture body (fixture base).

[0034] Fixtures are widely used in electronics manufacturing. To improve production efficiency and product quality, tooling fixtures are commonly used in the middle and later stages of production for functional testing or to assist in assembly (assembling products with fixed shapes and heights). Their applications in electronics manufacturing plants are extremely broad because they are non-standard and customized; the possibilities are endless.

[0035] A clamping fixture for valve body machining includes a base plate and a positioning ring fixed to the top of the base plate. The positioning ring is used for axial positioning of the valve body. V-shaped positioning blocks and V-shaped clamping blocks with opposite openings are horizontally arranged on both sides of the positioning ring. The V-shaped positioning blocks are fixed to the top of the base plate, and the V-shaped clamping blocks are horizontally slidably mounted on the top of the base plate via a linear drive mechanism to adjust the distance between the V-shaped positioning blocks and the V-shaped clamping blocks. A pressure plate for auxiliary clamping is provided at the top of the base plate. The linear drive mechanism includes a guide block fixed to the top of the base plate, a hinge block slidably mounted on the top of the guide block, and a linear drive component that pushes the hinge block to slide back and forth on the top of the guide block along a direction approaching or away from the positioning ring. The hinge block and the V-shaped clamping blocks are rotatably connected by a pin. A groove is provided at the top of the guide block to accommodate the hinge block sliding back and forth along a direction approaching or away from the positioning ring. The V-shaped positioning block is fixed to the top of the base plate by a mounting bracket, which includes a vertically arranged support part and an integrally bent mounting part located on one side of the bottom of the support part. The mounting part is fixedly connected to the base plate, and a reinforcing rib is provided between the mounting part and the support part. Several mounting holes for fixing are provided on the base plate. Two pressure plates are provided, respectively arranged radially at both ends of the positioning ring. The pressure plates have a "7" shaped structure with the opening facing the positioning ring. The linear drive component is a hydraulic cylinder, and a hydraulic reversing valve is mounted on the base plate. The positioning ring has a circular structure, and several positioning protrusions are provided at the top of the positioning ring. The beneficial effects of this clamping fixture for valve body processing are: by setting up the positioning ring, V-shaped positioning block, V-shaped clamping block, linear drive mechanism, and pressure plates, the valve body can be quickly clamped and positioned, resulting in high work efficiency. Simultaneously, the clamping is firm and reliable, eliminating the need for manual nut tightening, reducing the labor intensity of workers, and preventing insufficient clamping force due to worker fatigue, which could lead to workpiece scrap or equipment damage.

[0036] Another valve body clamping fixture includes a base. Two opposing first and second support plates are located on one side of the base. The first support plate is fixedly connected to the base, while the second support plate is movably connected to the base. A motor is fixedly connected to the outer side of the first support plate. The motor output shaft passes through the first support plate and is fixedly connected to a rotating shaft. Two support rods are rotatably connected to the end of the rotating shaft. An elastic element is fixedly connected between the ends of the two support rods. A connecting rod is fixedly connected to the inner side of the second support plate. The outer surface of the end of the connecting rod has an annular boss. The support rods and connecting rod are used to clamp the valve body at both ends of the valve body. Two outward-facing grooves are symmetrically formed along the edge of the rotating shaft end. Connecting holes are symmetrically formed on both sides of the grooves. Through holes are formed at the ends of the support rods, and the through holes and connecting holes are connected by a rotating rod. The support rods have an inverted L-shape structure, and the two support rods are arranged opposite each other. The ends of the support rods are covered with a rubber layer. The ends of the connecting rods are also covered with a rubber layer. The base has sliding grooves on both sides of its upper surface at one end of the second support plate. A through groove is located inside the base, connecting the sliding grooves. The bottom of the second support plate is connected to a connecting seat located within the through groove via a connecting block. The thickness of the connecting seat is equal to the depth of the through groove. A first limiting groove communicating with the through groove is located on the side surface of the base at one end of the second support plate. A second limiting groove communicating with the first limiting groove is located on the first limiting groove. A limiting rod is located within the first limiting groove, and multiple limiting blocks are evenly distributed axially on the limiting rod. The limiting blocks can move along the second limiting groove and can engage with the front and rear sides of the first limiting groove. The limiting rod abuts against the connecting seat at the bottom of the second support plate. The distance between two limiting blocks is the same as the length of the first limiting groove. The elastic element is a spring, with both ends fixed to opposite sides of the ends of the two support rods. Multiple positioning holes are provided at both ends of the base. This valve body clamping fixture has the following advantages: a fixed first support plate and a movable second support plate are set on the base. The first support plate has a rotating shaft driven by a motor, and two support rods are rotatably connected to the end of the rotating shaft. An elastic element is provided between the ends of the two support rods. The second support plate has a connecting rod, and the end of the connecting rod has an annular boss. The support rods and the connecting rod are used to clamp the valve body at both ends of the valve body. When the valve body needs to be clamped, the two ends of the valve body are respectively fitted onto the support rods and the connecting rods. Under the elastic force of the elastic element, the two support rods rotate outward until they are pressed against the inner wall of the valve body. The annular boss on the connecting rod provides a limiting function for the valve body. When the clamping fixture clamps the valve body, it avoids contact with the outer surface of the valve body.

[0037] Neither of these two valve body clamping fixtures can clamp valve bodies of different specifications.

[0038] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Reference Figures 1 to 5This utility model discloses a valve body clamping fixture, including: an outer shell, a drive mechanism inside, at least three clamping members on the top surface of the outer shell, the clamping members being circumferentially spaced, the clamping members being inserted into the outer shell and connected to the drive mechanism, and multiple pressing structures fixedly connected to the top surface of the outer shell, the pressing structures being adjustable, the pressing structures being circumferentially spaced, and the pressing structures and clamping members being staggered.

[0040] In one feasible solution, the outer shell includes a top plate 1, and a plurality of straight grooves 3 are provided on the pressing structure. The plurality of straight grooves 3 are arranged at equal intervals around the periphery. The axis of the straight grooves 3 coincides with the diameter of the top plate 1. The housing 10 is coaxially fixed to the bottom surface of the top plate 1, and the driving mechanism is arranged inside the housing 10.

[0041] In one feasible solution, the drive mechanism includes a drive plate 13, which is horizontally disposed inside the housing 10. The drive plate 13 has multiple arc-shaped grooves 19 evenly spaced circumferentially. A worm wheel 14 is coaxially fixed to the drive plate 13. The top and bottom ends of the worm wheel 14 are coaxially rotatably connected to the top plate 1 and the housing 10, respectively. The worm wheel 14 meshes with a worm 16. The worm 16 is rotatably connected to the housing 10 through a bearing 15. One end of the worm 16 is coaxially fixed to the output shaft of a drive motor 17, which is fixed to the inner wall of the housing 10.

[0042] In one feasible solution, the clamping component includes a movable rod 12, the bottom end of which is slidably connected to a slide rail 11, the slide rail 11 being fixed to the inner bottom wall of the housing 10, the top end of which is slidably connected to a straight slide groove 3, a round rod 18 being provided in the middle of the movable rod 12, the round rod 18 being slidably connected to an arc-shaped slide groove 19, and the top end of the movable rod 12 passing through the top plate 1 and being rotatably connected to a clamping block 4 via a pin 5.

[0043] During clamping, the drive motor 17 drives the worm gear 16 to rotate, which in turn drives the worm wheel 14 to rotate. The worm wheel 14 then drives the drive plate 13 to rotate. At this time, the moving rod 12 moves synchronously towards the axis of the housing 10 under the action of the arc-shaped slide groove 19, thereby clamping the valve body placed on the top plate 1. The linear slide groove 3 and the slide rail 11 are designed to keep the moving rod 12 stable during movement and prevent it from shifting. As the drive plate 13 rotates, the angle of the arc-shaped slide groove 19 changes. To avoid interference between the moving rod 12 and the arc-shaped slide groove 19, which would prevent it from moving, the middle part of the moving rod 12 is set as a round rod 18. The round rod 18 is slidably connected in the arc-shaped slide groove 19 and will not interfere.

[0044] In one feasible solution, the clamping structure includes a sliding shell 20, which is fixedly connected to the top plate 1. The top opening of the sliding shell 20 is flush with the top surface of the top plate 1. A lifting rod 9 is vertically slidably connected inside the sliding shell 20. A second screw 21 is threadedly connected inside the lifting rod 9. The bottom end of the second screw 21 is rotatably connected to the bottom wall of the sliding shell 20. The top end of the second screw 21 protrudes from the lifting rod 9 and is fixedly connected to a knob 8. A clamping rod 7 is provided on the part of the lifting rod 9 that protrudes from the sliding shell 20. The clamping rod 7 is horizontally positioned.

[0045] In one feasible solution, mounting grooves are provided on both sides of the lifting rod 9, and a through groove is provided on the clamping rod 7. The two sides of the through groove are slidably connected to the two mounting grooves respectively. One end of the clamping rod 7 is threadedly connected to a first screw 6. One end of the first screw 6 is rotatably connected to the lifting rod 9, and the other end of the first screw 6 passes through the clamping rod 7.

[0046] First, adjust the position of the clamping rod 7 according to the specifications of the valve body. By rotating the first screw 6, the clamping rod 7 can be slidably connected in the mounting groove along its own axis, thus matching the valve body to be processed. Then, rotate the knob 8, which drives the second screw 21 to rotate, thereby driving the lifting rod 9 to descend and press the valve body. The clamping parts are used to fix the valve body.

[0047] In one feasible solution, the top plate 1 is provided with a plurality of mounting holes 2 at equal intervals in the circumferential direction. The mounting holes 2 are close to the outer edge of the top plate 1 and located outside the housing 10.

[0048] The mounting hole 2 is provided to facilitate the installation of the valve body clamping fixture of this utility model.

[0049] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A valve body clamping fixture, characterized in that, include: The outer shell has a drive mechanism inside. At least three clamping members are provided on the top surface of the outer shell. The clamping members are circumferentially spaced and are inserted into the outer shell and are connected to the drive mechanism. Multiple pressing structures are fixed to the top surface of the outer shell. The pressing structures are adjustable and are circumferentially spaced. The pressing structures and the clamping members are staggered.

2. The valve body clamping fixture according to claim 1, characterized in that: The outer shell includes a top plate (1), and the pressing structure has multiple straight grooves (3). The multiple straight grooves (3) are circumferentially spaced, and the axis of the straight grooves (3) coincides with the diameter of the top plate (1). A housing (10) is coaxially fixed to the bottom surface of the top plate (1), and the driving mechanism is disposed in the housing (10).

3. The valve body clamping fixture according to claim 2, characterized in that: The driving mechanism includes a driving plate (13), which is horizontally disposed inside the housing (10). The driving plate (13) has multiple arc-shaped grooves (19) evenly spaced around it. A worm wheel (14) is coaxially fixed to the driving plate (13). The top and bottom ends of the worm wheel (14) are coaxially rotatably connected to the top plate (1) and the housing (10), respectively. The worm wheel (14) meshes with a worm (16). The worm (16) is rotatably connected to the housing (10) through a bearing seat (15). One end of the worm (16) is coaxially fixed to the output shaft of a drive motor (17). The drive motor (17) is fixed to the inner wall of the housing (10).

4. The valve body clamping fixture according to claim 3, characterized in that: The clamping component includes a movable rod (12), the bottom end of which is slidably connected to a slide rail (11), the slide rail (11) is fixed to the inner bottom wall of the housing (10), the top end of which is slidably connected to a straight slide groove (3), a round rod (18) is provided in the middle of the movable rod (12), the round rod (18) is slidably connected to an arc-shaped slide groove (19), and the top end of the movable rod (12) extends out of the top plate (1) and is rotatably connected to a clamping block (4) via a pin (5).

5. A valve body clamping fixture according to claim 2, characterized in that: The clamping structure includes a sliding shell (20), which is fixed to the top plate (1). The top opening of the sliding shell (20) is flush with the top surface of the top plate (1). A lifting rod (9) is vertically slidably connected inside the sliding shell (20). A second screw (21) is threaded inside the lifting rod (9). The bottom end of the second screw (21) is rotatably connected to the bottom wall of the sliding shell (20). The top end of the second screw (21) protrudes from the lifting rod (9) and is fixedly connected to a knob (8). A clamping rod (7) is provided on the part of the lifting rod (9) that protrudes from the sliding shell (20). The clamping rod (7) is horizontally arranged.

6. A valve body clamping fixture according to claim 5, characterized in that: The lifting rod (9) has mounting grooves on its opposite side walls, and the clamping rod (7) has a through groove. The opposite side walls of the through groove are slidably connected to the two mounting grooves. One end of the clamping rod (7) is threadedly connected to a first screw (6). One end of the first screw (6) is rotatably connected to the lifting rod (9), and the other end of the first screw (6) passes through the clamping rod (7).

7. A valve body clamping fixture according to claim 2, characterized in that: The top plate (1) has a plurality of mounting holes (2) spaced evenly in the circumferential direction. The mounting holes (2) are close to the outer edge of the top plate (1) and located outside the housing (10).

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