Flange type multi-layer hard sealing butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a flange type multi-layer hard sealing butterfly valve which comprises a valve body, flange plates are welded to the outer sides of the two ends of the valve body respectively, a connecting insertion pipe is welded to one side of each flange plate, and a sealing connecting ring is arranged on the outer side of each connecting insertion pipe in a limiting and sleeving mode. A valve rod column is integrally formed at the top of the valve body, a limiting fluted disc is installed at the top of the valve rod column through a bolt, a handle is rotatably installed at the top of the limiting fluted disc, and a limiting clamping plate is installed at the bottom of the handle through a rotating shaft. After the connecting insertion pipe is inserted into a pipeline, the sealing connecting ring sleeved on the outer side of the connecting insertion pipe is in sealing connection with the interior of the pipeline, so that the sealing performance of the valve in the installation and use process is further improved, and the phenomenon of stress relaxation or material aging at a flange sealing position after long-term use is avoided; therefore, a medium in a pipeline is prevented from leaking from the joint face of the valve body and the pipeline flange, and economic loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically a flanged multi-layer hard-seal butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. It is characterized by a disc-shaped closing element that rotates around a valve shaft to open and close. Butterfly valves can control the flow of various types of fluids, including air, water, steam, corrosive media, slurry, oil, liquid metals, and radioactive media, primarily serving as a shut-off and throttling device in pipelines. The butterfly valve's opening and closing element is a disc-shaped plate that rotates around its own axis within the valve body to achieve opening, closing, or regulation.

[0003] Existing flanged multi-layer hard-seal butterfly valves use flange connections at both ends of the valve body to connect with the pipeline system. During long-term operation, factors such as media pressure fluctuations, temperature changes, and chemical corrosion can cause stress relaxation or material aging at the flange seals, leading to sealing interface failure. In this case, the pipeline medium will form a leakage channel along the valve body and pipeline flange mating surface, causing media loss and environmental pollution. This not only results in direct economic losses but may also pose safety risks due to the leakage of toxic or hazardous media.

[0004] Therefore, a flanged multi-layer hard-seal butterfly valve is specifically proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a flanged multi-layer hard-seal butterfly valve to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: A flanged multi-layer hard-seal butterfly valve includes a valve body. A flange is welded to the outer side of each end of the valve body. A connecting pipe is welded to one side of the flange. A sealing connecting ring is fitted on the outer side of the connecting pipe. A valve stem is integrally formed on the top of the valve body. A limiting gear is bolted to the top of the valve stem. A handle is rotatably mounted on the top of the limiting gear. A limiting clamp is mounted on the bottom of the handle via a rotating shaft. A valve disc is installed inside the valve body for limiting. A sealing seat is integrally formed on the bottom of the valve body. A sealing plug assembly is bolted to the inside of the sealing seat. Multiple connecting holes are evenly spaced inside the flange.

[0006] Preferably, the valve stem body is rotatably mounted inside the valve stem column, and three first sealing rubber rings are equidistantly fitted on the outer side of the valve stem body.

[0007] Preferably, the valve stem has three first sealing grooves evenly spaced inside, and the first sealing grooves are sealed to the first sealing rubber ring.

[0008] Preferably, the valve disc has a mounting groove at the top and bottom, and the output end of the handle passes through the inside of the limiting gear disc and is fixedly connected to the top of the valve stem body.

[0009] Preferably, the inner wall of the sealing seat is provided with a plurality of second sealing grooves at equal intervals, and the bottom of the sealing seat is provided with a connecting block.

[0010] Preferably, the sealing plug assembly includes a plug rod, and three second rubber sealing rings are equidistantly fitted on the outer side of the plug rod. A sealing plate is welded to the bottom of the plug rod, and the sealing plate is sealed to the connecting block. A plug is provided at the top of the plug rod.

[0011] Compared with the prior art, this utility model provides a flanged multi-layer hard seal butterfly valve, which has the following advantages:

[0012] When connecting a valve to a pipeline, a connecting pipe welded to one side of each of the two flanges can be inserted into the pipeline. Once the connecting pipe is inserted, the sealing ring fitted on the outside of the connecting pipe will seal against the inside of the pipeline, thereby further improving the valve's sealing performance during installation and use. This prevents stress relaxation or material aging at the flange seals over long-term use, thus preventing leakage of the medium from the valve body at the flange joint and reducing economic losses. Attached Figure Description

[0013] Figure 1 This is a side view of the main body of the present utility model.

[0014] Figure 2 This is a front view structural diagram of the present utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 4 This utility model Figure 3 A magnified structural diagram of point A in the middle.

[0017] In the diagram: 1. Valve body; 2. Flange; 3. Valve disc; 4. Mounting groove; 5. Limiting plate; 6. Handle; 7. Limiting gear; 8. Valve stem; 801. First sealing rubber ring; 802. First sealing groove; 803. Valve stem body; 9. Connecting hole; 10. Sealing seat; 1001. Connecting block; 1002. Second sealing groove; 11. Sealing plug assembly; 1101. Insert rod; 1102. Sealing plate; 1103. Second rubber sealing ring; 1104. Plug; 12. Connecting tube; 13. Sealing connection ring. Detailed Implementation

[0018] 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.

[0019] Example 1: A flange 2 is welded to the outer side of both ends of the valve body 1. A connecting pipe 12 is welded to one side of the flange 2. A sealing connecting ring 13 is provided on the outer side of the connecting pipe 12. A valve stem 8 is integrally formed on the top of the valve body 1. A limiting gear 7 is installed on the top of the valve stem 8 by bolts. A handle 6 is rotatably installed on the top of the limiting gear 7. A limiting plate 5 is installed on the bottom of the handle 6 by a rotating shaft. A valve disc 3 is installed inside the valve body 1 for limiting. A sealing seat 10 is integrally formed on the bottom of the valve body 1. A sealing plug assembly 11 is installed inside the sealing seat 10 by bolts. Multiple connecting holes 9 are opened at equal intervals inside the flange 2.

[0020] Specifically, such as Figure 1 and Figure 2 As shown, since a flange 2 is welded to the outer side of each end of the valve body 1, and multiple connection holes 9 are equally spaced inside the flange 2, it can be flanged to the pipeline when connecting to the pipeline. Since a connecting pipe 12 is welded to one side of each of the two flanges 2, the connecting pipe 12 welded to one side of the two flanges 2 can be inserted into the pipeline when connecting the valve to the pipeline. Since a sealing ring 13 is fitted on the outer side of each connecting pipe 12, the sealing ring 13 fitted on the outer side of the connecting pipe 12 will seal with the inside of the pipeline after the connecting pipe 12 is inserted into the pipeline, thereby further improving the sealing performance of the valve during installation and use, avoiding stress relaxation or material aging at the flange seal after long-term use, and thus preventing the medium in the pipeline from leaking from the joint surface between the valve body and the pipeline flange, thereby reducing economic losses.

[0021] Example 2: A valve stem body 803 is rotatably mounted inside the valve stem column 8, and three first sealing rubber rings 801 are equidistantly fitted on the outer side of the valve stem body 803. Three first sealing grooves 802 are equidistantly opened inside the valve stem column 8, and the first sealing grooves 802 are sealed to the first sealing rubber rings 801. The top and bottom of the valve disc 3 are respectively provided with an installation groove 4, and the output end of the handle 6 passes through the inside of the limiting gear 7 and is fixedly connected to the top of the valve stem body 803. The inner wall of the sealing seat 10 is provided with multiple second sealing grooves 1002 at equal intervals, and the bottom of the sealing seat 10 is provided with a connecting block 1001. The sealing plug assembly 11 includes a plug rod 1101, and three second rubber sealing rings 1103 are equidistantly fitted on the outer side of the plug rod 1101. A sealing plate 1102 is welded to the bottom of the plug rod 1101, and the sealing plate 1102 is sealed to the connecting block 1001. The top of the plug rod 1101 is provided with a plug 1104.

[0022] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, when installing the valve disc 3, the mounting grooves 4 at the top and bottom of the valve disc 3 are respectively placed into the bottom of the valve stem body 803 and the top of the plug 1104. Then, the bottom of the valve stem body 803 is inserted into the mounting groove 4 at the top of the valve disc 3. The insert rod 1101 is inserted into the sealing seat 10, and the plug 1104 is inserted into the mounting groove 4 at the bottom of the valve disc 3. Then, the second rubber sealing ring 1103 is sealed and connected to the second sealing groove 1002. Finally, the sealing plate 1102 is sealed and installed at the bottom of the connecting block 1001. The valve stem body 803 can be driven by rotating the handle 6. Rotating inside the valve stem column 8, the valve disc 3 rotates inside the valve body 1 via the rotation of the valve stem body 803, thereby controlling the opening and closing of the valve. Since the bottom of the handle 6 is equipped with a limit plate 5 via a rotating shaft, and one end of the limit plate 5 cooperates with the limit gear plate 7, the handle 6 can be restricted by locking one end of the limit plate 5 into the toothed groove on the outside of the limit gear plate 7, preventing the handle 6 from shaking when unattended. In use, pressing the limit plate 5 will cause one end of the limit plate 5 to disengage from the toothed groove on the outside of the limit gear plate 7, thereby controlling the rotation of the valve disc 3.

[0023] Working Principle: During use, a flange 2 is welded to the outer sides of both ends of the valve body 1, and multiple connection holes 9 are evenly spaced inside the flange 2. Therefore, it can be flanged to the pipeline. Since a connecting pipe 12 is welded to one side of each flange 2, the connecting pipe 12 welded to one side of the flange 2 can be inserted into the pipeline when connecting the valve. Each connecting pipe 12 is fitted with a sealing ring 13 on its outer side. When the connecting pipe 12 is inserted into the pipeline, the sealing ring 13 on the outer side of the connecting pipe 12 will seal against the inside of the pipeline, thereby further improving the valve's sealing performance during installation and use. Then, the valve disc... The mounting grooves 4 at the top and bottom of valve stem 803 are respectively inserted into the bottom of valve stem body 803 and the top of plug 1104. Then, the bottom of valve stem body 803 is inserted into the mounting groove 4 at the top of valve disc 3. The insert rod 1101 is inserted into the sealing seat 10 and the plug 1104 is inserted into the mounting groove 4 at the bottom of valve disc 3. Then, the second rubber sealing ring 1103 is sealed and connected with the second sealing groove 1002. Then, the sealing plate 1102 is sealed and installed at the bottom of connecting block 1001. By rotating handle 6, valve stem body 803 can be rotated inside valve stem column 8. The rotation of valve stem body 803 can drive valve disc 3 to rotate inside valve body 1, thereby controlling the opening and closing of valve.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A flanged multi-layer hard-seal butterfly valve, comprising a valve body (1), characterized in that: A flange (2) is welded to the outer side of each end of the valve body (1). A connecting tube (12) is welded to one side of the flange (2). A sealing connecting ring (13) is provided on the outer side of the connecting tube (12). A valve stem column (8) is integrally formed on the top of the valve body (1). A limiting toothed disc (7) is installed on the top of the valve stem column (8) by bolts. A handle (6) is rotatably installed on the top of the limiting toothed disc (7). A limiting plate (5) is installed on the bottom of the handle (6) by a rotating shaft. A valve disc (3) is installed inside the valve body (1). A sealing seat (10) is integrally formed on the bottom of the valve body (1). A sealing plug assembly (11) is installed inside the sealing seat (10) by bolts. Multiple connecting holes (9) are opened at equal intervals inside the flange (2).

2. The flanged multi-layer hard-seal butterfly valve according to claim 1, characterized in that: The valve stem column (8) is internally rotatably mounted with a valve stem body (803), and three first sealing rubber rings (801) are equidistantly fitted on the outer side of the valve stem body (803).

3. The flanged multi-layer hard-seal butterfly valve according to claim 2, characterized in that: The valve stem (8) has three first sealing grooves (802) evenly spaced inside, and the first sealing grooves (802) are sealed to the first sealing rubber ring (801).

4. The flanged multi-layer hard-seal butterfly valve according to claim 1, characterized in that: The valve disc (3) is provided with a mounting groove (4) at the top and bottom respectively, and the output end of the handle (6) passes through the inside of the limiting gear disc (7) and is fixedly connected to the top of the valve stem body (803).

5. The flanged multi-layer hard-seal butterfly valve according to claim 1, characterized in that: The inner wall of the sealing seat (10) is provided with a plurality of second sealing grooves (1002) at equal intervals, and the bottom of the sealing seat (10) is provided with a connecting block (1001).

6. The flanged multi-layer hard-seal butterfly valve according to claim 1, characterized in that: The sealing plug assembly (11) includes a plug rod (1101), and three second rubber sealing rings (1103) are provided at equal intervals on the outer side of the plug rod (1101). A sealing plate (1102) is welded to the bottom of the plug rod (1101), and the sealing plate (1102) is sealed to the connecting block (1001). A plug (1104) is provided at the top of the plug rod (1101).

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