Butterfly valve convenient to maintain

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a butterfly valve convenient to maintain, which comprises a valve main body, a valve plate is rotatably arranged in the valve main body, a connecting hole is longitudinally arranged in the middle of the valve plate, a valve rod is inserted in the connecting hole, one end of the valve rod penetrates through the valve main body, and a limiting hole is arranged on the end face of the valve plate on the outer wall of the connecting hole. A limiting pin capable of abutting against the outer wall of the valve rod is arranged in the limiting hole. The butterfly valve convenient to maintain has the advantage that the valve plate or the valve rod can be replaced independently.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and specifically to a butterfly valve that is easy to maintain. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on / off control of low-pressure pipeline media. A butterfly valve is a type of valve in which the closing element (valve disc or butterfly plate) is a disc that rotates around the valve shaft to achieve opening and closing.

[0003] Currently, in most butterfly valves on the market, the valve stem and valve plate are directly welded together. For example, a pneumatic wave-generating butterfly valve with publication number "CN222668936U" includes a valve body and a pneumatic actuator. The valve plate is rotatably connected inside the valve body, and a first valve stem is fixedly installed inside the valve plate. A first bevel gear is fixedly sleeved at one end of the first valve stem, and a shell is fixedly installed on the top of the valve body. This results in the need to replace the entire valve plate or valve stem when it is damaged, which leads to high maintenance costs and makes it impossible to replace the valve plate or valve stem separately. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a butterfly valve that is easy to maintain and allows for the individual replacement of the valve plate or valve stem, addressing the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a butterfly valve that is easy to maintain, comprising a valve body, characterized in that: a valve plate is rotatably provided inside the valve body, a connecting hole is longitudinally provided in the middle of the valve plate, a valve stem is inserted into the connecting hole, one end of the valve stem passes through the valve body, a limiting hole is provided on the end face of the valve plate on the outer wall of the connecting hole, and a limiting pin is provided in the limiting hole that can abut against the outer wall of the valve stem.

[0006] The above technical solution, compared with the existing technology where the valve plate and valve stem are welded together and require replacement of the whole unit when damaged, allows for easy replacement of the valve plate or valve stem by the valve stem through a connection hole on the valve plate, reducing maintenance costs. Furthermore, the use of a limiting hole and a limiting pin ensures the valve stem is securely held in place, preventing axial movement and guaranteeing the stability of the connection between the valve stem and valve plate. The structure is also simple, requiring only the tightening and loosening of the limiting pin during disassembly and assembly, facilitating maintenance.

[0007] A further feature of this invention is that: the top of the valve body has a mounting portion, the mounting portion has a mounting hole for the valve stem to pass through, the top of the mounting portion has a first mounting plate, and the middle of the first mounting plate has a mounting groove communicating with the mounting hole. The diameter of the mounting groove is larger than the diameter of the mounting hole, and a first sealing element and an elastic retaining spring are sequentially arranged in the mounting groove.

[0008] The above technical solution improves the stability of valve stem installation by setting up the mounting part, ensures the sealing between valve stem and valve body by setting up the first sealing element, and further prevents the possibility of axial movement of valve stem by setting up the elastic snap ring, thus ensuring the performance.

[0009] A further feature of this invention is that a second mounting plate is provided on the first mounting plate, and corresponding screw holes are provided on both the first and second mounting plates, with mounting screws installed in the screw holes.

[0010] The above technical solution provides dust protection for the elastic retaining ring and the first seal by setting the second mounting plate, while the screw holes and screws facilitate disassembly and assembly by the staff.

[0011] A further feature of this invention is that the mounting hole is located below the first sealing element and a first bushing is provided therein, and the first bushing has a first through hole for the valve stem to pass through.

[0012] The above technical solution achieves a sealing effect between the valve stem and the valve body through the first bushing, while also preventing the valve stem from wearing down the inner wall of the mounting hole, thus protecting the mounting hole.

[0013] A further feature of this invention is that the lower part of the valve body is provided with a mounting seat for inserting the end of the valve stem. The mounting seat has a mounting cavity, and a second bushing is provided in the mounting cavity. The second bushing has a second through hole for inserting the end of the valve stem.

[0014] The above technical solution facilitates installation at the end of the valve stem by setting up the mounting base, while the mounting cavity facilitates the installation of the second bushing. The second bushing further improves the sealing between the valve stem and the valve body, and prevents wear between the valve body and the valve stem connection, thereby increasing service life.

[0015] A further feature of this invention is that a sealing groove is provided on the arc surface of the valve plate, and a second sealing element is embedded in the sealing groove.

[0016] By adopting the above technical solution, by embedding a second sealing element on the arc surface of the valve plate, the sealing performance between the valve plate and the valve body can be further improved, ensuring that there is no leakage when the valve body is closed.

[0017] A further feature of this invention is that the end of the valve stem is a square shaft, and the connecting hole is a corresponding square hole.

[0018] By adopting the above technical solution, the torque transmission area between the valve stem and the valve plate can be increased by setting a square shaft and a square hole, which can prevent the valve plate from slipping during opening and closing, and improve the accuracy and response speed of valve control.

[0019] A further feature of this invention is that a mounting flange is provided on the side of the valve body.

[0020] The above technical solution allows for connection to external pipes via the installation of flanges, facilitating installation by staff.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is an exploded view of the present invention.

[0024] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0025] Figure 4 This is an exploded view of the second bushing and mounting base of this utility model.

[0026] Labeling: Valve body 1, mounting part 11, mounting hole 111, first bushing 112, first through hole 112a, first mounting plate 12, mounting groove 121, first seal 121a, elastic snap ring 121b, second mounting plate 13, screw hole 14, mounting screw 15, mounting seat 16, mounting cavity 161, second bushing 162, second through hole 162a, mounting flange 17, annular groove 18, valve plate 2, connecting hole 21, limiting hole 22, limiting pin 23, sealing groove 24, second seal 25, valve stem 3. Detailed Implementation

[0027] In the accompanying drawings of this specific embodiment and the disclosed embodiments, only the structures involved in the disclosed embodiments are involved. Other structures can be referred to with ordinary design. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of this utility model, they are protected by patent law.

[0028] like Figure 1-4The butterfly valve shown is easy to maintain and includes a valve body 1. A valve plate 2 is rotatably disposed inside the valve body 1. A connecting hole 21 is longitudinally provided in the middle of the valve plate 2. A valve stem 3 is inserted into the connecting hole 21. One end of the valve stem 3 passes through the valve body 1. A limit hole 22 is opened on the end face of the valve plate 2 on the outer wall of the connecting hole 21. A limit pin 23 that can abut against the outer wall of the valve stem 3 is provided in the limit hole 22.

[0029] like Figure 2-3 The valve body 1 shown has a mounting part 11 at the top, and a mounting hole 111 for the valve stem 3 to pass through is provided in the mounting part 11. A first mounting plate 12 is provided at the top of the mounting part 11. A mounting groove 121 communicating with the mounting hole 111 is opened in the middle of the first mounting plate 12. The diameter of the mounting groove 121 is larger than the diameter of the mounting hole 111. A first sealing element 121a and an elastic snap ring 121b are arranged in sequence in the mounting groove 121.

[0030] like Figure 2-3 The first mounting plate 12 shown is provided with a second mounting plate 13. The first mounting plate 12 and the second mounting plate 13 are provided with corresponding screw holes 14, and mounting screws 15 are provided in the screw holes 14; for example... Figure 3 The mounting hole 111 shown is located below the first seal 121a and has a first bushing 112. The first bushing 112 has a first through hole 112a for the valve stem 3 to pass through.

[0031] like Figure 4 The valve body 1 shown has a mounting seat 16 at the lower part for inserting the end of the valve stem 3. The mounting seat 16 has a mounting cavity 161, and the mounting cavity 161 has a second bushing 162. The second bushing 162 has a second through hole 162a for inserting the end of the valve stem 3.

[0032] like Figure 2 , 4 The valve plate 2 shown has a sealing groove 24 on its arc surface, and a second sealing element 25 is embedded in the sealing groove 24. The inner wall of the valve body 1 has an annular groove 18 corresponding to the sealing groove 24. When the valve body is in the closed state, the protruding part of the second sealing element 25 can be located in the annular groove 18 to ensure the sealing effect. The valve stem 3 has a square shaft at the end and a corresponding square hole 21 for the connection hole. The valve body 1 has a mounting flange 17 on its side.

[0033] Compared to the existing technology where the valve plate 2 and valve stem 3 are welded together, requiring replacement of the entire valve plate or valve stem when damaged, this utility model, by providing a connecting hole 21 on the valve plate 2 and inserting the valve stem 3 into the connecting hole 21, facilitates the individual replacement of the valve plate 2 or valve stem 3 by operators, reducing maintenance costs. Furthermore, the setting of a limiting hole 22 and a limiting pin 23, with the limiting pin 23 inserted into the limiting hole 22, tightens the valve stem 3 to prevent axial movement. In addition, the elastic retaining spring 121b provided in the mounting groove 121 further prevents axial movement of the valve stem 3, ensuring the connection stability between the valve stem 3 and the valve plate 2. The structure is simple, requiring only the tightening and loosening of the limiting pin 23 during disassembly and assembly.

Claims

1. A butterfly valve that is easy to maintain, comprising a valve body, characterized in that: A valve plate is rotatably provided inside the valve body. A connecting hole is provided longitudinally in the middle of the valve plate. A valve stem is inserted into the connecting hole. One end of the valve stem passes through the valve body. A limit hole is provided on the end face of the valve plate on the outer wall of the connecting hole. A limit pin is provided in the limit hole that can abut against the outer wall of the valve stem.

2. The butterfly valve for easy maintenance according to claim 1, characterized in that: The valve body has a mounting part on its top, and the mounting part has a mounting hole for the valve stem to pass through. The mounting part has a first mounting plate on its top, and the first mounting plate has a mounting groove in the middle that communicates with the mounting hole. The diameter of the mounting groove is larger than the diameter of the mounting hole. The mounting groove has a first sealing element and an elastic retaining spring arranged in sequence.

3. The butterfly valve for easy maintenance according to claim 2, characterized in that: The first mounting plate is provided with a second mounting plate, and the first mounting plate and the second mounting plate are provided with corresponding screw holes, and the screw holes are provided with mounting screws.

4. The butterfly valve for easy maintenance according to claim 3, characterized in that: The mounting hole is located below the first seal and has a first bushing. The first bushing has a first through hole for the valve stem to pass through.

5. The butterfly valve for easy maintenance according to claim 4, characterized in that: The lower part of the valve body is provided with a mounting seat for inserting the end of the valve stem. The mounting seat is provided with a mounting cavity, and a second bushing is provided in the mounting cavity. The second bushing is provided with a second through hole for inserting the end of the valve stem.

6. The butterfly valve for easy maintenance according to claim 5, characterized in that: A sealing groove is provided on the arc surface of the valve plate, and a second sealing element is embedded in the sealing groove.

7. The butterfly valve for easy maintenance according to claim 6, characterized in that: The valve stem end is a square shaft, and the connecting hole is a corresponding square hole.

8. The butterfly valve for easy maintenance according to claim 7, characterized in that: The valve body has a mounting flange on its side.

Images