Positioning fixture for machining double eccentric butterfly valve

Abstract

This utility model discloses a positioning fixture for machining double eccentric butterfly valves, specifically relating to the field of fixture technology. It includes a base plate, on which a first fixing frame is mounted. A shaft disc is mounted on one side of the first fixing frame, and a clamping block is mounted on the shaft disc. A gear ring is mounted on the clamping block, and a fixing assembly is installed inside the clamping block. A double eccentric valve plate, fixed by the fixing assembly, is placed on the clamping block. A rotating mechanism is mounted on the first fixing frame, one end of which meshes with the gear ring. A second fixing frame is mounted on the base plate, and a first cylinder is mounted on the second fixing frame. A cylinder push rod is connected to the output end of the first cylinder, and a push plate is mounted on the end of the cylinder push rod. This utility model features stable positioning, convenient machining, and high efficiency, effectively solving the problem of positioning during machining of double eccentric butterfly valves.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and more specifically, to a positioning fixture for machining double eccentric butterfly valves. Background Technology

[0002] In the field of butterfly valve manufacturing, double eccentric butterfly valves are increasingly widely used due to their unique structure and excellent performance. However, the positioning process during manufacturing presents numerous challenges. Traditional positioning fixtures often fail to accurately position the valve plate when fixing double eccentric butterfly valves, making it difficult to guarantee machining accuracy. For example, some fixtures fix the valve plate using only simple clamping methods, which can easily lead to displacement of the valve plate during manufacturing. This results in significant dimensional deviations in the machined valve plate, affecting the sealing performance and overall quality of the butterfly valve.

[0003] Furthermore, existing fixtures typically only allow machining of a single part of the valve plate. To machine different parts of the valve plate, such as drilling holes in valve shaft seats at different locations or grinding the plate surface, frequent disassembly and reassembly of the valve plate are required, which is cumbersome and inefficient. This not only increases the labor intensity of workers but also prolongs the production cycle and increases production costs.

[0004] Furthermore, removing the machined valve plate from the fixture after processing is also quite difficult. Some fixtures have unreasonable structural designs, fixing the valve plate too tightly, requiring additional tools or a significant amount of time to remove it, which also affects production efficiency to some extent.

[0005] Therefore, a positioning fixture for machining double eccentric butterfly valves is proposed. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, this utility model provides a double eccentric butterfly valve machining positioning fixture to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a double eccentric butterfly valve processing positioning fixture, comprising a base plate, a first fixing frame mounted on the base plate, a shaft disk mounted on one side of the first fixing frame, a clamping block mounted on the shaft disk, a toothed ring mounted on the clamping block, a top-fixing component mounted inside the clamping block, a double eccentric valve plate fixed by the top-fixing component placed on the clamping block, a rotating mechanism mounted on the first fixing frame, one end of the rotating mechanism being meshed with the toothed ring, a second fixing frame mounted on the base plate, a first cylinder mounted on the second fixing frame, a cylinder push rod connected to the output end of the first cylinder, and a push plate mounted on the end of the cylinder push rod.

[0008] Preferably, the clamping block has two positioning grooves at its end, each positioning groove has a guide hole at its bottom, the clamping block has an installation cavity, each positioning groove communicates with the installation cavity through the corresponding guide hole, the top fixing component is installed in the installation cavity, and the top fixing component is slidably connected to the two guide holes on both sides.

[0009] Preferably, the double eccentric valve plate includes a plate body and a valve shaft seat, with valve shaft seats symmetrically arranged on one side of the plate body, and the valve shaft seats are configured to cooperate with the positioning groove.

[0010] Preferably, the rotating mechanism includes a motor, a rotating rod, and a gear. The motor is mounted on a first fixed frame, and the output end of the motor is connected to the rotating rod. A gear that meshes with a gear ring is mounted on the rotating rod.

[0011] Preferably, the fixing assembly includes a second cylinder, a push block, a slider, a push rod, and a spring. The second cylinder is installed in the mounting cavity. The push block is installed at the telescopic end of the second cylinder. The upper and lower inclined surfaces of the push block are slidably connected to sliders. Both ends of each slider are slidably connected to the inner wall of the mounting cavity. Each slider is welded with a push rod. Each push rod is fitted with a spring. The end of each push rod is slidably connected to a corresponding guide hole.

[0012] Preferably, the first fixing bracket has a through hole, a slip ring is installed in the through hole, and an air pipe connected to the second cylinder is inserted into the slip ring.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. The first cylinder pushes the push plate to squeeze the double eccentric valve plate, and with the jacking component, it is jacked from the inside, which can fix the valve plate firmly on the clamping block. After positioning, the push plate is removed, and the processing parts of the valve plate are fully exposed, which makes it easy to process various parts of the valve plate, such as grinding the surface of the plate and drilling the valve shaft seat, which greatly improves the convenience of processing.

[0015] 2. By setting up a rotating mechanism, the clamping block can drive the double eccentric valve plate to rotate. When drilling the valve shaft seat, there is no need to manually readjust the valve plate position. The machining position of the valve shaft seat can be easily switched by the rotating mechanism. When machining the plate body, the position can also be adjusted by rotation, thereby further improving the machining efficiency.

[0016] 3. By using a combination structure of a second cylinder, push block, slider, push rod and spring in the top fixing component, the double eccentric valve plate can be directly fixed on the clamping block for positioning. After processing, the top fixing component is reset, and the spring pushes the slider to retract the push rod. At this time, the processed double eccentric valve plate can be directly removed, which improves the convenience of material handling.

[0017] 4. The motor in the rotating mechanism has a self-locking function, which can stably maintain the position of the double eccentric valve plate after the position is adjusted, ensuring that the valve plate will not be displaced during the processing, thus improving the stability and accuracy of the processing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the rotating component connection structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the top-fixing component of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the double eccentric valve plate of this utility model.

[0022] The reference numerals in the attached drawings are as follows: 1. Base plate; 2. First fixing frame; 3. Shaft disc; 4. Clamping block; 5. Gear ring; 6. Rotating mechanism; 601. Motor; 602. Rotating rod; 603. Gear; 7. Second fixing frame; 8. First cylinder; 9. Cylinder push rod; 10. Push plate; 11. Double eccentric valve plate; 1101. Plate body; 1102. Valve shaft seat; 12. Positioning groove; 13. Top fixing assembly; 1301. Second cylinder; 1302. Push block; 1303. Slider; 1304. Top rod; 1305. Spring. 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] As attached Figure 1-4 The illustrated double eccentric butterfly valve machining positioning fixture includes a base plate 1, on which a first fixing frame 2 is mounted. A shaft disk 3 is mounted on one side of the first fixing frame 2, a clamping block 4 is mounted on the shaft disk 3, a toothed ring 5 is mounted on the clamping block 4, a top-fixing component 13 is mounted inside the clamping block 4, and a double eccentric valve plate 11, which is fixed by the top-fixing component 13, is placed on the clamping block 4. A rotating mechanism 6 is mounted on the first fixing frame 2, one end of which is engaged with the toothed ring 5. A second fixing frame 7 is mounted on the base plate 1, and a first cylinder 8 is mounted on the second fixing frame 7. A cylinder push rod 9 is connected to the output end of the first cylinder 8, and a push plate 10 is mounted on the end of the cylinder push rod 9.

[0025] In practice, the double eccentric valve plate 11 is placed on the clamping block 4. The first cylinder 8 operates, causing the cylinder push rod 9 to push the push plate 10 to press the double eccentric valve plate 11 into place. Then, the jacking assembly 13 operates to jack and fix the double eccentric valve plate 11, thus completing the jacking and fixing of the double eccentric valve plate 11. Afterwards, the first cylinder 8 resets, and the push plate 10 is removed, exposing all the parts of the double eccentric valve plate 11 that need to be processed, facilitating the processing of the double eccentric valve plate 11. When drilling and changing the valve seat 1102 of the double eccentric valve plate 11, the rotating mechanism 6 is used to rotate the clamping block 4, so that the double eccentric valve plate 11 can rotate accordingly, so as to drill the other valve seat 1102, improving the convenience of processing. Similarly, one side of the plate 1101 is not blocked by the push plate 10, which also facilitates the grinding of the surface of the plate 1101. In addition, with the rotation of the rotating mechanism 6, the position can be adjusted, further improving the convenience of processing and processing efficiency.

[0026] Two positioning grooves 12 are provided at the end of the clamping block 4. Each positioning groove 12 has a guide hole at its bottom. An installation cavity is provided inside the clamping block 4. Each positioning groove 12 is connected to the installation cavity through the corresponding guide hole. The top fixing component 13 is installed in the installation cavity, and the two sides of the top fixing component 13 are slidably connected to the two guide holes.

[0027] The double eccentric valve plate 11 includes a plate body 1101 and a valve shaft seat 1102. The valve shaft seat 1102 is symmetrically arranged on one side of the plate body 1101, and the valve shaft seat 1102 is configured to cooperate with the positioning groove 12.

[0028] In practice, by inserting each valve seat 1102 into the corresponding positioning groove 12, the pusher 10 pushes the plate 1101 so that after the valve seat 1102 moves into place, the fixing component 13 operates and protrudes from each guide hole to fix the valve seat 1102, thereby fixing the double eccentric valve plate 11 on the clamping block 4. The pusher 10 can then be removed so that the front of the plate 1101 is not obstructed and there is reserved processing space to facilitate grinding of the surface of the plate 1101. The outer surfaces of the two valve seats 1102 are also not obstructed, so that drilling can be performed.

[0029] The rotating mechanism 6 includes a motor 601, a rotating rod 602, and a gear 603. The motor 601 is mounted on the first fixed frame 2. The output end of the motor 601 is connected to the rotating rod 602. The gear 603, which meshes with the gear ring 5, is mounted on the rotating rod 602.

[0030] In practice, the motor 601 is used to rotate the rotating rod 602, which in turn causes the gear 603 to mesh with the gear ring 5 and rotate the clamping block 4. This allows the position of the double eccentric valve plate 11 fixed on the clamping block 4 to be adjusted. The motor 601 is self-locking to stabilize the adjusted position, thereby improving the convenience and stability of processing the double eccentric valve plate 11.

[0031] The top-fixing assembly 13 includes a second cylinder 1301, a push block 1302, a slider 1303, a push rod 1304, and a spring 1305. The second cylinder 1301 is installed in the mounting cavity. The push block 1302 is installed on the telescopic end of the second cylinder 1301. The upper and lower inclined surfaces of the push block 1302 are slidably connected to the slider 1303. Both ends of each slider 1303 are slidably connected to the inner wall of the mounting cavity. Each slider 1303 is welded with a push rod 1304. Each push rod 1304 is sleeved with a spring 1305. The end of each push rod 1304 is slidably connected to the corresponding guide hole.

[0032] The first fixing frame 2 has a through hole, a slip ring is installed in the through hole, and an air pipe connected to the second cylinder 1301 is inserted into the slip ring.

[0033] In practice, the second cylinder 1301 operates, causing the pusher block 1302 to push the two sliders 1303, which in turn compress the sliders 1303. This causes the push rods 1304 to be pushed out from their respective guide holes and thus abut against the inner side of the corresponding valve shaft seat 1102, thereby securing the double eccentric valve plate 11. After the double eccentric valve plate 11 is processed, the securing component 13 resets, and the spring 1305 compresses the sliders 1303, causing the push rods 1304 to retract and reset. This allows the processed double eccentric valve plate 11 to be removed directly, improving the ease of material handling.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 positioning fixture for machining double eccentric butterfly valves, comprising a base plate (1), characterized in that: A first fixing frame (2) is installed on the base plate (1). A shaft disk (3) is installed on one side of the first fixing frame (2). A clamping block (4) is installed on the shaft disk (3). A toothed ring (5) is installed on the clamping block (4). A top-fixing component (13) is installed inside the clamping block (4). A double eccentric valve plate (11) fixed by the top-fixing component (13) is placed on the clamping block (4). A rotating mechanism (6) is installed on the first fixing frame (2). One end of the rotating mechanism (6) is meshed with the toothed ring (5). A second fixing frame (7) is installed on the base plate (1). A first cylinder (8) is installed on the second fixing frame (7). A cylinder push rod (9) is connected to the output end of the first cylinder (8). A push plate (10) is installed at the end of the cylinder push rod (9).

2. The positioning fixture for machining a double eccentric butterfly valve according to claim 1, characterized in that: The clamping block (4) has two positioning grooves (12) at its end. Each positioning groove (12) has a guide hole at its bottom. The clamping block (4) has an installation cavity. Each positioning groove (12) is connected to the installation cavity through the corresponding guide hole. The top fixing component (13) is installed in the installation cavity, and the top fixing component (13) is slidably connected to the two guide holes on both sides.

3. The positioning fixture for machining a double eccentric butterfly valve according to claim 2, characterized in that: The double eccentric valve plate (11) includes a plate body (1101) and a valve shaft seat (1102). The valve shaft seat (1102) is symmetrically arranged on one side of the plate body (1101), and the valve shaft seat (1102) is configured to cooperate with the positioning groove (12).

4. The positioning fixture for machining a double eccentric butterfly valve according to claim 3, characterized in that: The rotating mechanism (6) includes a motor (601), a rotating rod (602) and a gear (603). The motor (601) is mounted on the first fixed frame (2). The output end of the motor (601) is connected to the rotating rod (602). The rotating rod (602) is equipped with a gear (603) that meshes with the gear ring (5).

5. A positioning fixture for machining a double eccentric butterfly valve according to claim 4, characterized in that: The top-fixing assembly (13) includes a second cylinder (1301), a push block (1302), a slider (1303), a push rod (1304), and a spring (1305). The second cylinder (1301) is installed in the mounting cavity. The push block (1302) is installed on the telescopic end of the second cylinder (1301). The upper and lower inclined surfaces of the push block (1302) are slidably connected to the slider (1303). Both ends of each slider (1303) are slidably connected to the inner wall of the mounting cavity. Each slider (1303) is welded with a push rod (1304). Each push rod (1304) is sleeved with a spring (1305). The end of each push rod (1304) is slidably connected to the corresponding guide hole.

6. A positioning fixture for machining a double eccentric butterfly valve according to claim 5, characterized in that: The first fixing bracket (2) has a through hole, a slip ring is installed in the through hole, and an air pipe connected to the second cylinder (1301) is inserted into the slip ring.

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