Concentric positioning machining mould of three-eccentric hard sealing butterfly valve

Abstract

The utility model relates to the technical field of concentric positioning of three-eccentric hard sealing butterfly valves, and discloses a concentric positioning processing mould of a three-eccentric hard sealing butterfly valve, which comprises a three-eccentric hard sealing butterfly valve, a concentric positioning tool is inserted in the three-eccentric hard sealing butterfly valve, and a positioning hole is arranged in the concentric positioning tool. By arranging the fixing support and the limiting supporting plate, when the butterfly valve is limited and fixed, force can be evenly applied from the upper direction and the lower direction, it is guaranteed that the butterfly valve cannot deviate in the machining process, the clamping fixture can adapt to butterfly valves of different sizes or shapes, the universality of the clamping fixture is improved, and the machining efficiency is improved. The rear end of the extension supporting rod is in contact with the surface of the front face of the three-eccentric hard sealing butterfly valve, the inner wall of the limiting supporting plate is in contact with the surface of the three-eccentric hard sealing butterfly valve, the rear end of the fixing frame is in contact with the surface of the front face of the three-eccentric hard sealing butterfly valve, and the butterfly valve is fixed and limited from different directions under the combined action of the contact relations.

Description

Technical Field

[0001] This utility model relates to the field of concentric positioning technology for triple eccentric hard seal butterfly valves, and in particular to a concentric positioning machining fixture for triple eccentric hard seal butterfly valves. Background Technology

[0002] A butterfly valve is characterized by its stem axis being offset from both the disc center and the body center, and the valve seat rotation axis forming a certain angle with the valve body passage axis. The concentric positioning design of a triple-eccentric hard-seal butterfly valve refers to the stem axis being offset from both the disc center and the body center, with a β-angle offset between the valve seat rotation axis and the valve body passage axis. This design allows the valve disc sealing surface to gradually detach from and press against the valve seat sealing surface during opening and closing, significantly reducing mechanical wear and scratches, and improving sealing performance and service life.

[0003] An existing concentric positioning machining fixture for a triple eccentric hard-seal butterfly valve has limitations. When performing concentric positioning machining on triple eccentric hard-seal butterfly valves, the sizes of the valves vary, and the dimensions of the concentric positioning machining fixture are fixed after production. This makes it inconvenient to adjust the dimensions of the concentric positioning machining fixture according to the actual size of the triple eccentric hard-seal butterfly valve. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a concentric positioning machining fixture for a triple eccentric hard seal butterfly valve.

[0005] This utility model is achieved by the following technical solution: a concentric positioning machining fixture for a triple eccentric hard seal butterfly valve, including a triple eccentric hard seal butterfly valve, a concentric positioning tool inserted inside the triple eccentric hard seal butterfly valve, a positioning hole opened inside the concentric positioning tool, a rotating handle fixedly connected to the front of the concentric positioning tool, and a rotating wheel rotatably connected inside the concentric positioning tool.

[0006] The concentric positioning tool has a fixed frame fixedly connected to its front side, and an extension rod is slidably connected inside the fixed frame. A limit plate is fixedly connected to the front side of the extension rod, and a limit plate is fixedly connected to the rear end of the extension rod.

[0007] Through the above technical solution, the rotating handle is symmetrically distributed vertically around the concentric positioning tool, with two handles. This symmetrical distribution makes it convenient for operators to hold and operate the concentric positioning tool from different angles. It provides a more stable operating method when performing concentric positioning processing operations, so that the operating force can be applied evenly and reduce the possibility of tool tilting or inaccurate positioning due to unilateral operation.

[0008] As a further improvement to the above solution, the number of rotating handrails is set to two, and the two rotating handrails are symmetrically distributed vertically around the concentric positioning tool. The surface of the rotating wheel is in contact with the inner wall surface of the triple eccentric hard seal butterfly valve.

[0009] As a further improvement to the above solution, the rear end of the extension rod contacts the front surface of the triple eccentric hard seal butterfly valve, and the fixed bracket is located on the front of the triple eccentric hard seal butterfly valve.

[0010] As a further improvement to the above scheme, the number of the rotating wheel and the fixed frame is set to two, and the two rotating wheels and the fixed frame are symmetrically distributed vertically around the triple eccentric hard seal butterfly valve.

[0011] Through the above technical solution, the symmetrical rotating wheels can better contact the inner wall of the triple eccentric hard seal butterfly valve, positioning and supporting the butterfly valve from both the top and bottom during the concentric positioning process, ensuring the concentricity of the butterfly valve during processing. The symmetrical distribution of the fixed frame also helps to stabilize the connection between the entire positioning tool and the butterfly valve, improving the accuracy and reliability of positioning.

[0012] As a further improvement to the above solution, the number of the fixed bracket and the limiting support plate is set to two, and the two fixed brackets and the limiting support plate are symmetrically distributed vertically around the triple eccentric hard seal butterfly valve.

[0013] As a further improvement to the above solution, the inner wall of the limiting support plate is in contact with the surface of the triple eccentric hard seal butterfly valve, and the rear end of the fixed frame is in contact with the front surface of the triple eccentric hard seal butterfly valve.

[0014] As a further improvement to the above solution, the rotating handle is located on the front of the triple eccentric hard seal butterfly valve, the positioning hole is located inside the triple eccentric hard seal butterfly valve, the rotating wheel is located inside the triple eccentric hard seal butterfly valve, and a fixed bracket is fixedly connected to the front of the limiting support plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model, by setting a fixed bracket and a limiting support plate, enables the uniform application of force from both top and bottom directions when limiting and fixing the butterfly valve, ensuring that the butterfly valve will not shift during processing. It can also adapt to butterfly valves of different sizes or shapes, improving the versatility of the fixture. By setting the rear end of the extension rod to contact the front surface of the triple eccentric hard seal butterfly valve, the inner wall of the limiting support plate to contact the surface of the triple eccentric hard seal butterfly valve, and the rear end of the fixed frame to contact the front surface of the triple eccentric hard seal butterfly valve, these contact relationships work together to fix and limit the butterfly valve from different directions.

[0017] This invention achieves concentric positioning of the butterfly valve by setting a positioning hole inside the concentric positioning tool and inserting it into the triple eccentric hard-seal butterfly valve. This design is the core of achieving concentric positioning of the butterfly valve. The positioning hole can accurately determine the center position of the butterfly valve, providing a precise reference for the processing. At the same time, the rotating wheel on the concentric positioning tool rolls on the inner wall of the butterfly valve and cooperates with other components to fine-tune the butterfly valve in different directions, ensuring that the concentricity of the butterfly valve reaches the optimal state during the processing, thereby improving the processing accuracy and sealing performance of the butterfly valve. 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 disassembled structure of the triple eccentric hard seal butterfly valve of this utility model;

[0020] Figure 3 This is a schematic diagram of the rear view structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of this utility model from below;

[0022] Figure 5 This is a schematic diagram of the right-side structure of the present invention.

[0023] Explanation of key symbols:

[0024] 1. Triple eccentric hard seal butterfly valve; 2. Concentric positioning tool; 3. Positioning hole; 4. Rotating handle; 5. Rotating wheel; 6. Fixed frame; 7. Extension support rod; 8. Fixed bracket; 9. Limiting support plate. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] Example:

[0027] Please combine Figure 1-5 This embodiment provides a concentric positioning machining fixture for a triple eccentric hard seal butterfly valve, including a triple eccentric hard seal butterfly valve 1, a concentric positioning tool 2 inserted inside the triple eccentric hard seal butterfly valve 1, a positioning hole 3 opened inside the concentric positioning tool 2, a rotating handle 4 fixedly connected to the front of the concentric positioning tool 2, and a rotating wheel 5 rotatably connected inside the concentric positioning tool 2.

[0028] The front of the concentric positioning tool 2 is fixedly connected to a fixed frame 6, and the inside of the fixed frame 6 is slidably connected to an extension rod 7. The front of the extension rod 7 is fixedly connected to a limiting support plate 9, and the rear end of the extension rod 7 is fixedly connected to the limiting support plate 9. By setting the fixed support 8 and the limiting support plate 9, force can be applied evenly from both the top and bottom directions when limiting and fixing the butterfly valve, ensuring that the butterfly valve will not shift during processing. It can also adapt to butterfly valves of different sizes or shapes, improving the versatility of the fixture. By setting the rear end of the extension rod 7 to contact the front surface of the triple eccentric hard seal butterfly valve 1, the inner wall of the limiting support plate 9 to contact the surface of the triple eccentric hard seal butterfly valve 1, and the rear end of the fixed frame 6 to contact the front surface of the triple eccentric hard seal butterfly valve 1, these contact relationships work together to fix and limit the butterfly valve from different directions.

[0029] The rotating handle 4 is symmetrically distributed vertically around the concentric positioning tool 2, and there are two of them. This symmetrical distribution makes it convenient for operators to hold and operate the concentric positioning tool 2 from different angles. It provides a more stable operating method when performing concentric positioning processing operations, so that the operating force can be applied evenly and reduce the possibility of tool tilting or inaccurate positioning due to unilateral operation.

[0030] The number of rotating handles 4 is set to two. The two rotating handles 4 are symmetrically distributed vertically around the concentric positioning tool 2. The surface of the rotating wheel 5 is in contact with the inner wall surface of the triple eccentric hard seal butterfly valve 1.

[0031] The rear end of the extension rod 7 contacts the front surface of the triple eccentric hard seal butterfly valve 1, and the fixed bracket 8 is located on the front of the triple eccentric hard seal butterfly valve 1.

[0032] Two rotating wheels 5 and two fixed frames 6 are set, and the two rotating wheels 5 and the fixed frames 6 are symmetrically distributed vertically around the triple eccentric hard seal butterfly valve 1. The core of the design is to achieve concentric positioning of the butterfly valve by setting a positioning hole 3 inside the concentric positioning tool 2 and inserting it into the triple eccentric hard seal butterfly valve 1. The positioning hole 3 can accurately determine the center position of the butterfly valve, providing a precise reference for the processing. At the same time, the rotating wheel 5 on the concentric positioning tool 2 rolls on the inner wall of the butterfly valve and cooperates with other components to fine-tune the butterfly valve in different directions, ensuring that the concentricity of the butterfly valve reaches the best state during the processing, thereby improving the processing accuracy and sealing performance of the butterfly valve.

[0033] The symmetrical rotating wheels 5 can better contact the inner wall of the triple eccentric hard seal butterfly valve 1, positioning and supporting the butterfly valve from both the top and bottom during the concentric positioning process, ensuring the concentricity of the butterfly valve during processing. The symmetrical distribution of the fixed frame 6 also helps to stabilize the connection between the entire positioning tool and the butterfly valve, improving the accuracy and reliability of positioning.

[0034] The number of fixed brackets 8 and limiting support plates 9 is set to two, and the two fixed brackets 8 and limiting support plates 9 are symmetrically distributed vertically around the triple eccentric hard seal butterfly valve 1.

[0035] The inner wall of the limiting support plate 9 is in contact with the surface of the triple eccentric hard seal butterfly valve 1, and the rear end of the fixing frame 6 is in contact with the front surface of the triple eccentric hard seal butterfly valve 1.

[0036] The rotating handle 4 is located on the front of the triple eccentric hard seal butterfly valve 1, the positioning hole 3 is located inside the triple eccentric hard seal butterfly valve 1, the rotating wheel 5 is located inside the triple eccentric hard seal butterfly valve 1, and the limiting support plate 9 is fixedly connected to the fixed bracket 8 on the front.

[0037] The implementation principle of the concentric positioning machining fixture for a triple eccentric hard-seal butterfly valve in this embodiment is as follows: By setting a fixed bracket 8 and a limiting support plate 9, force can be applied evenly from both the top and bottom directions when limiting and fixing the butterfly valve, ensuring that the butterfly valve will not shift during processing. This fixture can also adapt to butterfly valves of different sizes or shapes, improving its versatility. The rear end of the extension rod 7 contacts the front surface of the triple eccentric hard-seal butterfly valve 1, the inner wall of the limiting support plate 9 contacts the surface of the triple eccentric hard-seal butterfly valve 1, and the rear end of the fixed frame 6 contacts the front surface of the triple eccentric hard-seal butterfly valve 1. These contact relationships work together to fix and limit the butterfly valve from different directions. The core of achieving concentric positioning of the butterfly valve is to set up a positioning hole 3 inside the concentric positioning tool 2 and insert it into the triple eccentric hard seal butterfly valve 1. The positioning hole 3 can accurately determine the center position of the butterfly valve, providing a precise reference for the processing. At the same time, the rotating wheel 5 on the concentric positioning tool 2 rolls on the inner wall of the butterfly valve and cooperates with other components to fine-tune the butterfly valve in different directions, ensuring that the concentricity of the butterfly valve reaches the optimal state during the processing, thereby improving the processing accuracy and sealing performance of the butterfly valve.

[0038] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A concentric positioning machining fixture for a triple-eccentric hard-seal butterfly valve, characterized in that, The device includes a triple eccentric hard seal butterfly valve (1), a concentric positioning tool (2) is inserted inside the triple eccentric hard seal butterfly valve (1), a positioning hole (3) is opened inside the concentric positioning tool (2), a rotating handle (4) is fixedly connected to the front of the concentric positioning tool (2), and a rotating wheel (5) is rotatably connected inside the concentric positioning tool (2). The front of the concentric positioning tool (2) is fixedly connected to a fixed frame (6), and the inside of the fixed frame (6) is slidably connected to an extension rod (7). The front of the extension rod (7) is fixedly connected to a limiting plate (9), and the rear end of the extension rod (7) is fixedly connected to a limiting plate (9).

2. The concentric positioning machining fixture for a triple eccentric hard-seal butterfly valve as described in claim 1, characterized in that: The number of rotating handrails (4) is set to two, and the two rotating handrails (4) are symmetrically distributed up and down with the concentric positioning tool (2) as the center. The surface of the rotating wheel (5) is in contact with the inner wall surface of the triple eccentric hard seal butterfly valve (1).

3. The concentric positioning machining fixture for a triple eccentric hard-seal butterfly valve as described in claim 1, characterized in that: The rear end of the extension rod (7) is in contact with the front surface of the triple eccentric hard seal butterfly valve (1), and the fixed bracket (8) is located on the front of the triple eccentric hard seal butterfly valve (1).

4. The concentric positioning machining fixture for a triple eccentric hard-seal butterfly valve as described in claim 1, characterized in that: The number of the rotating wheel (5) and the fixed frame (6) is set to two, and the two rotating wheels (5) and the fixed frame (6) are symmetrically distributed vertically around the triple eccentric hard seal butterfly valve (1).

5. The concentric positioning machining fixture for a triple eccentric hard-seal butterfly valve as described in claim 1, characterized in that: The number of the fixed bracket (8) and the limiting support plate (9) is set to two, and the two fixed brackets (8) and the limiting support plate (9) are symmetrically distributed vertically around the triple eccentric hard seal butterfly valve (1).

6. The concentric positioning machining fixture for a triple eccentric hard-seal butterfly valve as described in claim 1, characterized in that: The inner wall of the limiting support plate (9) is in contact with the surface of the triple eccentric hard seal butterfly valve (1), and the rear end of the fixing frame (6) is in contact with the front surface of the triple eccentric hard seal butterfly valve (1).

7. The concentric positioning machining fixture for a triple eccentric hard-seal butterfly valve as described in claim 1, characterized in that: The rotating handle (4) is located on the front of the triple eccentric hard seal butterfly valve (1), the positioning hole (3) is located inside the triple eccentric hard seal butterfly valve (1), the rotating wheel (5) is located inside the triple eccentric hard seal butterfly valve (1), and the limiting support plate (9) is fixedly connected to the front of the fixed bracket (8).

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