Eccentric vacuum butterfly valve

Abstract

The utility model relates to the technical field of eccentric vacuum butterfly valves, and discloses an eccentric vacuum butterfly valve, which comprises a valve main body, a valve rod and a butterfly plate, the valve main body is formed by connecting two half valve body parts, the two half valve body parts are provided with a filler assembly, and the butterfly plate and the valve rod are arranged as an integrated piece; through the integrated design of the valve rod and the butterfly plate, the problems that in the traditional design, connecting pieces exist, bolts, pins or other fasteners are possibly needed for connecting the valve rod and the butterfly plate in the traditional connecting mode, and the connecting pieces are likely to be affected by media, environment and other factors to be corroded in the using process are fundamentally solved; corrosion can not only cause looseness and fracture of a connecting piece, but also possibly cause leakage, and the normal operation of a valve and the safety of a system are seriously influenced. The packing between the two half valve bodies ensures the tightness of the joint, the sealing performance of the valve is further enhanced, medium leakage can be effectively prevented in a vacuum system, and stable operation of the system is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of eccentric vacuum butterfly valves, in particular to an eccentric vacuum butterfly valve. Background Art

[0002] The eccentric vacuum butterfly valve is a specially designed valve, mainly used in vacuum systems or fluid control occasions that require a high degree of sealing. Its design features and working principles give it unique advantages in a variety of industrial applications. The eccentric vacuum butterfly valve controls the flow of fluid by rotating the valve plate. When the valve plate rotates to a position parallel to the fluid channel, the valve is in an open state and the fluid can pass smoothly; when the valve plate rotates to a position perpendicular to the fluid channel, the valve is closed and the fluid is cut off. Due to the eccentric design of the valve plate, the valve can achieve a smooth transition during the opening and closing process to avoid sudden impact and eddy currents of the fluid.

[0003] The patent with the current announcement number CN220416265U discloses an eccentric vacuum butterfly valve, including an eccentric butterfly valve body, a fixed seat is fixedly connected to the upper end of the eccentric butterfly valve body, a mounting seat is fixedly connected to the upper end of the fixed seat, a rotating plate is arranged on the upper end of the mounting seat, a rotating limit column is arranged on the inner side of the mounting seat, and a valve plate is arranged at the lower end of the rotating limit column; although the above device solves the problem of improving the sealing effect of the inner wall of the eccentric butterfly valve body.

[0004] However, the above technical solution still has the following problems:

[0005] The valve stem and butterfly plate of the eccentric vacuum butterfly valve need to be connected by connectors. The connectors are susceptible to corrosion, which will weaken the strength and stability of the connectors. Over time, corrosion will gradually erode the material of the connectors, causing their load-bearing capacity to decrease, which may increase the risk of valve failure during operation, such as breakage or loosening, thereby affecting the stability and safety of the entire system; the introduction of connectors increases the complexity of the valve and makes maintenance more difficult. During the disassembly and installation process, extra attention and operation are required to ensure the correct installation and sealing of the connectors. In addition, wear and damage to the connectors themselves may also require more frequent replacement and repair. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides an eccentric vacuum butterfly valve to solve at least one of the problems raised by the background technology, such as: the eccentric vacuum butterfly valve improves the performance, reliability, manufacturing efficiency and maintenance convenience of the valve.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an eccentric vacuum butterfly valve, comprising a valve body, a valve stem installed in the valve body and a butterfly plate installed on the outside of the valve stem, the valve body is composed of two symmetrical half-valve body parts connected together, a packing assembly is installed at the connection between the two half-valve body parts, the butterfly plate and the valve stem are arranged as an integral part, the valve body, the packing assembly and the valve stem can be separated, a bolt is provided at one end of the valve body, and the two half-valve body parts and the packing assembly are fixedly connected by the bolt.

[0008] Furthermore, the packing assembly includes a sealing ring and a sealing ring, the outer side of the sealing ring is fixedly connected to the sealing ring, the inner wall of the sealing ring is fit-connected to the outer side of the valve stem, the outer side of the sealing ring is fit-connected to the rotating rod channel of the valve body, and the outer side of the sealing ring is fit-connected to the connection between the two half valve body parts.

[0009] Furthermore, the inner ring of the sealing ring and the inner wall of the pipeline of the valve body have the same diameter, and the outer curvature of the bottom of the sealing ring and the inner wall of the pipeline have the same curvature.

[0010] Furthermore, a connecting ring is installed at one end of each of the two half valve body parts, a clamping groove is provided on the surface of the connecting ring, a thread groove is provided at the bottom of the clamping groove, and a bolt passes through the clamping groove and the thread groove for threaded connection.

[0011] Furthermore, the bottom of the slot and one side of the nut of the bolt are fitted and connected.

[0012] Furthermore, the length of the bolt is equal to the distance between the two connecting ring pieces.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model fundamentally eliminates the existence of connectors in traditional designs through the integrated valve stem and butterfly plate design. Traditional connection methods may require bolts, pins or other fasteners to connect the valve stem and the butterfly plate. These connectors may be affected by factors such as the medium and the environment during use and may corrode. The corrosion will not only cause the connectors to loosen and break, but may also cause leakage, seriously affecting the normal operation of the valve and the safety of the system. The packing between the two half valve bodies ensures the tightness of the connection, further enhancing the sealing performance of the valve. In the vacuum system, it can effectively prevent medium leakage and ensure the stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 It is an exploded view of the overall three-dimensional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the valve body of the utility model;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the filler component of the utility model.

[0019] In the figure: 1, valve body; 101, slot; 102, thread groove; 2, butterfly plate; 3, valve stem; 4, packing assembly; 5, bolt; 6, connecting ring; 7, sealing ring; 8, sealing ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] like Figures 1 to 4 As shown, an eccentric vacuum butterfly valve includes a valve body 1, a valve stem 3 installed in the valve body 1 and a butterfly plate 2 installed on the outside of the valve stem 3. The valve body 1 is composed of two symmetrical half-valve body parts connected together, and a packing assembly 4 is installed at the connection between the two half-valve body parts. The butterfly plate 2 and the valve stem 3 are arranged as an integral part. The valve body 1, the packing assembly 4 and the valve stem 3 can be separated. A bolt 5 is provided at one end of the valve body 1, and the two half-valve body parts and the packing assembly 4 are fixedly connected by the bolt 5.

[0022] like Figure 1 As shown, an eccentric vacuum butterfly valve in the utility model is similar to the existing eccentric vacuum butterfly valve structure, such as the eccentric vacuum butterfly valve disclosed in the patent with announcement number CN220416265U. The main improvement of the utility model is to prevent the valve stem and butterfly plate of the integrated part from being corroded by the connecting parts, and the valve structure is more compact and stable, thereby improving the overall performance and reliability of the valve. Figures 1 to 4 As shown, when an eccentric vacuum butterfly valve in the utility model is in use, the valve body 1 is composed of two symmetrical half-valve body parts connected together. This design facilitates the installation and disassembly of the valve body 1 and makes the maintenance of the valve body 1 easier. At the same time, the packing assembly 4 installed at the connection between the two half-valve body parts ensures the sealing performance of the valve body 1 under high pressure or vacuum conditions and effectively prevents medium leakage. The butterfly plate 2 and the valve stem 3 are designed as an integrated piece. This design avoids the corrosion problem of the connecting parts that may exist in the traditional connection method. The integrated valve stem 3 and butterfly plate 2 not only improve the overall strength and stability of the valve body 1, but also reduce the risk of leakage, ensuring the long-term reliable operation of the valve body 1. The valve body 1, the packing assembly 4 and the valve stem 3 are detachable, which makes it more convenient to repair or replace parts of the valve body 1. When a part fails, it can be disassembled and replaced separately without replacing the entire valve body 1, thereby reducing the maintenance cost and time.

[0023] like Figures 1 to 4As shown, the packing assembly 4 includes a sealing ring 7 and a sealing ring 8. The sealing ring 8 is fixedly connected to the outer side of the sealing ring 7. The inner wall of the sealing ring 7 is fitted and connected to the outer side of the valve stem 3. The outer side of the sealing ring 7 is fitted and connected to the rotating rod channel of the valve body 1. The outer side of the sealing ring 8 is fitted and connected to the connection between the two half valve body parts.

[0024] Specifically, through this arrangement, the inner side of the sealing ring 7 is tightly fitted with the outer side of the valve stem 3, thereby ensuring the sealing between the valve stem 3 and the valve body 1 when rotating, and preventing the medium from leaking through the gap between the valve stem 3 and the valve body 1. At the same time, the outer side of the sealing ring 7 is also tightly connected with the rotating rod channel of the valve body 1, further enhancing the overall sealing performance of the valve body 1. The sealing ring 8 is located on the outer side of the sealing ring 7, further enhancing the sealing effect of the connection between the packing assembly 4 and the two half valve body parts. When the two half valve body parts are fixedly connected by bolts 5, the sealing ring 8 can fit tightly at the connection between the two half valve body parts to form an effective sealing barrier, thereby preventing the medium from leaking from the connection.

[0025] like Figures 2 to 4 As shown, the inner ring of the sealing ring 8 and the inner wall of the pipeline of the valve body 1 have the same diameter, and the outer curvature of the bottom of the sealing ring 7 and the inner wall of the pipeline have the same curvature.

[0026] Specifically, by setting the inner ring of the sealing ring 8 to have the same diameter as the inner wall of the pipe of the valve body 1, the sealing ring 8 can be tightly fitted on the inner wall of the pipe, thereby forming a continuous, gap-free sealing surface, which can effectively prevent the medium from leaking from the gap between the inner wall of the pipe and the sealing ring 8, and can also reduce the scouring and wear of the sealing ring 8 by the medium during the flow process, thereby extending the service life of the sealing ring 8. The outer curvature of the bottom of the sealing ring 7 is equal to the curvature of the inner wall of the pipe, so that the sealing ring 7 can better adapt to the shape of the inner wall of the pipe, achieve a more fitting sealing effect, reduce the gap caused by shape mismatch, and further enhance the sealing performance of the valve body 1.

[0027] like Figure 3 As shown, a connecting ring 6 is installed at one end of each of the two half valve bodies, a groove 101 is provided on the surface of the connecting ring 6, a thread groove 102 is provided at the bottom of the groove 101, and the bolt 5 passes through the groove 101 and the thread groove 102 for threaded connection.

[0028] Specifically, the setting of the connecting ring 6 makes the two half valve bodies more compact and stable when connected, and the bolt 5 is threadedly connected through the slot 101 and the thread groove 102, which can ensure a firm connection between the two half valve bodies, prevent medium leakage, and withstand greater pressure and impact force.

[0029] like Figures 1 to 3 As shown, the bottom of the slot 101 and one side of the nut of the bolt 5 are fitted and connected.

[0030] Specifically, by setting the shape and size of the bottom of the slot 101 to match one side of the nut of the bolt 5, the two can fit tightly. When the bolt 5 passes through the slot 101 and is screwed into the threaded groove 102, the nut will fit tightly to the bottom of the slot 101 to form a stable connection point. This fitting connection can effectively prevent the bolt 5 from loosening or falling off, thereby ensuring a firm connection between the two half valve body parts.

[0031] like Figures 1 to 3 As shown, the length of the bolt 5 is equal to the distance between the two connecting ring pieces 6 .

[0032] Specifically, by setting the length of the bolt 5 equal to the distance between the two connecting ring pieces 6, it can be ensured that the bolt 5 will not interfere with the connection part between the connecting ring piece 6 and the external pipeline during the tightening process. If the bolt 5 is too long, it may protrude to the outside of the connecting ring piece 6 and interfere with the external pipeline, resulting in installation difficulties or poor sealing. The appropriate length of the bolt 5 can avoid this situation, making the connection between the valve body 1 and the external pipeline smoother and tighter.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An eccentric vacuum butterfly valve, comprising a valve body (1), a valve stem (3) installed in the valve body (1), and a butterfly plate (2) installed outside the valve stem (3), characterized in that: The valve body (1) is composed of two symmetrical half-valve body parts connected together, a stuffing assembly (4) is installed at the connection between the two half-valve body parts, the butterfly plate (2) and the valve stem (3) are arranged as an integral part, the valve body (1), the stuffing assembly (4) and the valve stem (3) can be separated, a bolt (5) is provided at one end of the valve body (1), and the two half-valve body parts and the stuffing assembly (4) are fixedly connected by the bolt (5).

2. The eccentric vacuum butterfly valve according to claim 1, characterized in that: The packing assembly (4) comprises a sealing ring (7) and a sealing ring (8); the sealing ring (8) is fixedly connected to the outer side of the sealing ring (7); the inner wall of the sealing ring (7) is fitted and connected to the outer side of the valve stem (3); the outer side of the sealing ring (7) is fitted and connected to the rotating rod channel of the valve body (1); and the outer side of the sealing ring (8) is fitted and connected to the connection between the two half valve body parts.

3. An eccentric vacuum butterfly valve according to claim 2, characterized in that: The inner ring of the sealing ring (8) and the inner wall of the pipeline of the valve body (1) have the same diameter, and the outer curvature of the bottom of the sealing ring (7) and the inner wall of the pipeline have the same curvature.

4. An eccentric vacuum butterfly valve according to claim 1, 2 or 3, characterized in that: A connecting ring (6) is installed at one end of each of the two half valve body parts. A clamping groove (101) is provided on the surface of the connecting ring (6). A threaded groove (102) is provided at the bottom of the clamping groove (101). The bolt (5) passes through the clamping groove (101) and the threaded groove (102) for threaded connection.

5. The eccentric vacuum butterfly valve according to claim 4, characterized in that: The bottom of the slot (101) and one side of the nut of the bolt (5) are fitted and connected.

6. The eccentric vacuum butterfly valve according to claim 4, characterized in that: The length of the bolt (5) is equal to the distance between the two connecting ring pieces (6).

7. The eccentric vacuum butterfly valve according to claim 5, characterized in that: The length of the bolt (5) is equal to the distance between the two connecting ring pieces (6).

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