U-shaped metal sealing butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a U-shaped metal sealing butterfly valve which comprises a valve body, a valve rod is arranged in the valve body, a valve plate is installed on the valve rod, a control port is installed on the valve body, a sealing portion is arranged in the valve body, the sealing portion comprises an installation edge which is fixedly installed on the inner wall of the valve body, and the installation edge is fixedly installed on the inner wall of the valve body. A mounting opening is formed in the mounting edge, a sealing edge is mounted on one side of the mounting opening, mounting blocks are inserted into the mounting opening, detachable sealing soft edges are fixedly mounted on the mounting blocks, bolts are in threaded connection with the mounting blocks, the number of the bolts and the number of the mounting blocks are four, and the four groups of the bolts and the mounting blocks are symmetrically arranged at equal intervals; the sealing block on the detachable sealing soft edge is inserted into the mounting opening and is mounted through the bolt, so that the whole detachable sealing soft edge can be detached and replaced, and the situation that the detachable sealing soft edge loses efficacy and leaks water after being used for a long time is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a U-shaped metal sealing butterfly valve. Background Art

[0002] The hard-sealed butterfly valve mainly cuts off and throttles the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating. The hard-sealed butterfly valve is an eccentric metal sealing structure. The sealing form is metal-to-metal sealing, stainless steel plate and graphite composite plate sealing ring to metal sealing or other multi-layer superimposed sealing;

[0003] The invention relates to a novel bidirectional all-metal U-shaped sealing butterfly valve, comprising a valve body, a rotating shaft, a valve plate and a sealing device. The valve body, the rotating shaft and the valve plate are of a three-eccentric structure. The sealing device comprises a sealing gasket under a valve seat, a metal valve seat, a sealing gasket on a valve seat and a pressing piece stacked in sequence. The axial cross-section of the metal valve seat is a U-shape including a long arm and a short arm. A pressing table for installing the sealing device is protruding toward the center of the valve body. The sealing gasket under the valve seat and the sealing gasket on the valve seat are respectively pressed on both sides of the long arm of the metal valve seat. The pressing piece is fixed to the inner side of the valve body and one side presses the sealing gasket on the valve seat. The inner bending position of the U-shape of the metal valve seat has a gap with the pressing piece to form an elastic deformation space. The sealing structure is set as a new sealing structure in which the U-shaped metal valve seat, the upper and lower gaskets and the pressing piece cooperate. The U-shape of the metal valve seat has a certain elasticity and can be elastically sealed with the valve plate, so that the butterfly valve has a small valve closing torque and good bidirectional sealing performance.

[0004] However, in actual use, the medium forms a positive scouring on its sealing surface, and the butterfly plate will be deformed after being scoured, which affects the sealing performance. In addition, the internal sealing structure is not convenient to replace, and the sealing effect will be worn out after long-term use. Therefore, improvements are made based on the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a U-shaped metal sealing butterfly valve to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A U-shaped metal sealed butterfly valve comprises: a valve body, a valve stem is arranged inside the valve body, a valve plate is installed on the valve stem, a control port is installed on the valve body, a sealing part is arranged inside the valve body, the sealing part comprises a mounting edge fixedly installed on the inner wall of the valve body, a mounting port is opened on the mounting edge, and a sealing edge is installed on one side of the mounting port.

[0008] Preferably, a mounting block is inserted into the interior of the mounting opening, a detachable sealing soft edge is fixedly mounted on the mounting block, and a bolt is threadedly connected to the mounting block.

[0009] Preferably, the number of the bolts and the mounting blocks is four groups, and the four groups of bolts and the mounting blocks are symmetrically arranged at equal intervals.

[0010] Preferably, a buffer portion is provided inside the valve body, and the buffer portion includes a spring 1 fixedly connected to the inner wall of the valve body, and an extending end of the spring 1 is fixedly connected to a buffer plate.

[0011] Preferably, the number of the springs 1 is four groups, and the four groups of springs 1 are symmetrically arranged in a ring shape, and a buffer plate is connected through the extended end of the spring, so that when water enters, the buffer plate can prevent the water flow from directly impacting the inner wall of the valve body, reducing the impact force, thereby extending the overall use time.

[0012] Preferably, a rear plate is installed on the back of the valve body, and the rear plate is open, and a mounting opening is opened on the front surface of the valve body.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. A sealing block is installed on the detachable sealing soft edge, and the sealing block on the detachable sealing soft edge is inserted into the installation port, and then installed by bolts so that the detachable sealing soft edge can be disassembled and replaced as a whole, thereby preventing failure and leakage after long-term use.

[0015] Second, a buffer part is arranged inside the valve body, a spring is connected to the rear plate of the valve body, and a buffer plate is connected to the extended end of the spring, so that when water enters, the buffer plate can prevent the water flow from directly impacting the inner wall of the valve body, thereby reducing the impact force and extending the overall use time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the side section structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the enlarged structure of A in the utility model.

[0020] In the figure: 1. valve body; 21. sealing part; 211. mounting edge; 212. mounting port; 213. sealing edge; 214. removable sealing soft edge; 215. mounting block; 216. bolt; 22. buffer part; 221. spring 1; 222. buffer plate; 3. valve stem; 4. control port; 5. valve plate; 6. back plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-4 As shown, a U-shaped metal sealed butterfly valve comprises: a valve body 1, a valve stem 3 is arranged inside the valve body 1, a valve plate 5 is installed on the valve stem 3, a control port 4 is installed on the valve body 1, a sealing portion 21 is arranged inside the valve body 1, the sealing portion 21 comprises a mounting edge 211 fixedly installed on the inner wall of the valve body 1, a mounting port 212 is opened on the mounting edge 211, a sealing edge 213 is installed on one side of the mounting port 212, a mounting block 215 is inserted into the mounting port 212, a detachable sealing soft edge 214 is fixedly installed on the mounting block 215, bolts 216 are threadedly connected to the mounting block 215, the number of the bolts 216 and the mounting block 215 is four groups, and the four groups of bolts 216 and the mounting block 215 are symmetrically arranged at equal intervals.

[0023] Specifically, the sealing block on the detachable sealing soft edge 214 is inserted into the installation opening 212 and then installed by bolts 216 so that the detachable sealing soft edge 214 can be disassembled and replaced as a whole to prevent failure and leakage after long-term use.

[0024] like Figure 1-4 As shown, a buffer portion 22 is provided inside the valve body 1, and the buffer portion 22 includes a spring 221 fixedly connected to the inner wall of the valve body 1, and an extended end of the spring 221 is fixedly connected to a buffer plate 222. The number of springs 221 is four groups, and the four groups of springs 221 are symmetrically arranged in a ring shape, and the buffer plate 222 is connected through the extended end of the spring, so that when water enters, the buffer plate 222 can prevent the water flow from directly impacting the inner wall of the valve body 1, reducing the impact force, thereby extending the overall use time, and a rear plate 6 is installed on the back of the valve body 1, and the rear plate 6 is opened, and a mounting port 212 is opened on the front surface of the valve body 1.

[0025] Specifically, a spring is connected to the rear plate 6 of the valve body 1, and the extended end of the spring is connected to a buffer plate 222, so that when water enters, the buffer plate 222 can prevent the water flow from directly impacting the inner wall of the valve body 1, reducing the impact force, thereby extending the overall use time.

[0026] The working principle of the utility model is as follows:

[0027] By providing a mounting edge 211 on the valve body 1, installing a sealing edge 213 on the mounting plate, and providing a mounting port 212 on the mounting edge 211, by installing a sealing block on the removable sealing soft edge 214, by inserting the sealing block on the removable sealing soft edge 214 into the mounting port 212, and installing it with bolts 216 so that the removable sealing soft edge 214 can be disassembled and replaced as a whole, thereby preventing failure and leakage after long-term use. By providing a buffer portion 22 inside the valve body 1, a spring is connected to the rear plate 6 of the valve body 1, and the extended end of the spring is connected to the buffer plate 222, so that when water enters, the buffer plate 222 can prevent the water flow from directly impacting the inner wall of the valve body 1, thereby reducing the impact force and extending the overall use time.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A U-shaped metal sealing butterfly valve, characterized in that: include: A valve body (1), wherein a valve stem (3) is arranged inside the valve body (1), a valve plate (5) is mounted on the valve stem (3), a control port (4) is mounted on the valve body (1), a sealing portion (21) is arranged inside the valve body (1), the sealing portion (21) comprises a mounting edge (211) fixedly mounted on the inner wall of the valve body (1), a mounting port (212) is formed on the mounting edge (211), and a sealing edge (213) is mounted on one side of the mounting port (212).

2. A U-shaped metal sealing butterfly valve according to claim 1, characterized in that: A mounting block (215) is inserted into the interior of the mounting opening (212), a detachable sealing soft edge (214) is fixedly mounted on the mounting block (215), and a bolt (216) is threadedly connected to the mounting block (215).

3. A U-shaped metal sealing butterfly valve according to claim 2, characterized in that: The number of the bolts (216) and the mounting blocks (215) is four groups, and the four groups of the bolts (216) and the mounting blocks (215) are symmetrically arranged at equal intervals.

4. A U-shaped metal sealing butterfly valve according to claim 1, characterized in that: A buffer portion (22) is provided inside the valve body (1), and the buffer portion (22) comprises a spring 1 (221) fixedly connected to the inner wall of the valve body (1), and an extended end of the spring 1 (221) is fixedly connected to a buffer plate (222).

5. A U-shaped metal sealing butterfly valve according to claim 4, characterized in that: The number of the springs 1 (221) is four groups, and the four groups of springs 1 (221) are symmetrically arranged in a ring shape.

6. A U-shaped metal sealing butterfly valve according to claim 1, characterized in that: A rear plate (6) is installed on the back of the valve body (1), and the rear plate (6) is arranged to be open, and a mounting opening is provided on the front surface of the valve body (1).

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