Triple-eccentric metal sealing butterfly valve

Abstract

The utility model relates to the technical field of metal sealing butterfly valves, in particular to a triple-eccentric metal sealing butterfly valve which comprises a butterfly valve body, a packing sealing device and a control device, the packing sealing device is fixedly connected to the upper end of the butterfly valve body, the control device is fixedly connected to the inner side of the packing sealing device, and a valve shaft is fixedly connected to the lower end of the control device. The outer side of the valve shaft is fixedly connected with a filtering device; the butterfly valve comprises a valve body, a valve seat is installed on the inner side of the center of the valve body, and a fixing groove is formed in the inner side of the valve body. The filtering device comprises a fixing shaft, the outer side of the fixing shaft is fixedly connected with a first dish plate, the outer side of the fixing shaft is fixedly connected with a second dish plate, the outer side of the second dish plate is fixedly connected with a hard sealing face, the inner side of a fixing groove is connected with a filtering plate in a clamped mode, and the filtering plate comprises an installation plate. Impurities can be accumulated on the inner side of the filter plate when fluid passes through the filter screen, and physical damage to the butterfly plate, the valve rod or the valve seat is prevented.

Description

Technical Field

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

[0002] The triple eccentric metal sealed butterfly valve is a specially designed butterfly valve. It adopts a three-eccentric structure to achieve high sealing performance and long life. The triple eccentric metal sealed butterfly valve has various driving forms. In addition to electric, it can also be manual, worm gear drive or pneumatic.

[0003] During the use of the triple eccentric metal seal butterfly valve, as the water supply pipe may corrode over time, metal particles in the pipe material will fall off and enter the water. Large impurity particles may cause physical damage to the butterfly plate, valve stem or valve seat, affecting the integrity and service life of the valve;

[0004] Therefore, a triple eccentric metal sealing butterfly valve is proposed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a three-eccentric metal sealing butterfly valve to solve the problem that larger impurity particles may cause physical damage to the butterfly plate, valve stem or valve seat, thus affecting the integrity and service life of the valve.

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

[0007] A three-eccentric metal-sealed butterfly valve comprises a butterfly valve, a packing sealing device and a control device, wherein the upper end of the butterfly valve is fixedly connected to the packing sealing device, the inner side of the packing sealing device is fixedly connected to the control device, the lower end of the control device is fixedly connected to the valve shaft, and the outer side of the valve shaft is fixedly connected to the filter device; the butterfly valve comprises a valve body, a valve seat is installed on the inner side of the center of the valve body, and a fixing groove is provided on the inner side of the valve body; the filter device comprises a fixed shaft, a first disc plate is fixedly connected to the outer side of the fixed shaft, a second disc plate is fixedly connected to the outer side of the fixed shaft, a hard sealing surface is fixedly connected to the outer side of the second disc plate, a filter plate is clamped and connected to the inner side of the fixing groove, the filter plate comprises a mounting plate, a mounting groove is provided on the inner side of the mounting plate, a filter screen is fixedly connected to the inner side of the mounting groove, and a filter cotton is fixedly connected to the outer side of the filter screen; the bottom of the valve shaft is rotatably connected to the inner side of the valve body, and one side of the filter plate is in close contact with the fixed shaft.

[0008] As further optimization of the present invention, the first disc plate and the second disc plate are both arranged outside the fixed shaft, the shapes of the first disc plate and the second disc plate are both semicircular, the first disc plate and the second disc plate are staggered, and the first disc plate and the second disc plate are parallel to each other.

[0009] As a further optimization of the present invention, there are two hard sealing surfaces, both of which are semicircular in shape, and both of which are arranged at the center position of the outer sides of the first disc plate and the second disc plate, and the hard sealing surfaces are tightly attached to the inner side of the valve seat.

[0010] As a further optimization of the present invention, two filter plates are provided, the shape of the filter plates are both semicircular, the filter plates are both arranged on the inner side of the fixed groove, the filter plates are staggered, the filter plates are parallel to each other, and the filter plates are symmetrically arranged.

[0011] As a further optimization of the present invention, there are two fixing grooves, the fixing grooves are arranged in an arc shape, the fixing grooves are arranged symmetrically, the fixing grooves are arranged inside the valve body, the fixing grooves are parallel to each other, and the fixing grooves correspond to the filter plates one by one.

[0012] As a further optimization of the present invention, there are two filter screens, which are parallel to each other, are arranged in a semicircular shape, are symmetrically arranged on the inner side of the installation groove, and the center points of the two filter screens are located on the same parallel line.

[0013] As a further optimization of the present invention, the filter cotton is arranged between two filter screens, the filter cotton is arranged at the center of the mounting plate, the filter cotton and the two filter screens are parallel to each other, and the filter cotton and the two filter screens are equal in size and shape.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, by setting the filter plate, the fluid passes through the filter net so that impurities can accumulate on the inner side of the filter plate, thereby preventing the butterfly plate, valve stem or valve seat from causing physical damage, thereby causing the sealing surface to be unable to contact closely, and at the same time preventing impurities from being stuck between the first disc plate, the second disc plate and the valve seat, making it difficult to open or close the valve. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 This is a schematic diagram of the right side cross-sectional structure of the butterfly valve of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0019] Figure 4 This is a schematic diagram of the overall structure of the filter device of the utility model;

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the mounting plate of the utility model from top view.

[0021] In the figure: 1. butterfly valve; 11. valve body; 12. valve seat; 13. fixed groove; 2. packing sealing device; 3. control device; 4. filter device; 41. fixed shaft; 42. first disc plate; 43. second disc plate; 44. hard sealing surface; 45. filter plate; 451. mounting plate; 452. mounting groove; 453. filter screen; 454. filter cotton; 5. valve shaft. DETAILED DESCRIPTION

[0022] 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.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] See also Figure 1-5 , the utility model provides a technical solution:

[0025] A three-eccentric metal-sealed butterfly valve comprises a butterfly valve 1, a packing sealing device 2 and a control device 3. The upper end of the butterfly valve 1 is fixedly connected to the packing sealing device 2, the inner side of the packing sealing device 2 is fixedly connected to the control device 3, the lower end of the control device 3 is fixedly connected to the valve shaft 5, and the outer side of the valve shaft 5 is fixedly connected to the filter device 4; the butterfly valve 1 comprises a valve body 11, a valve seat 12 is installed on the inner side of the center of the valve body 11, and a fixing groove 13 is opened on the inner side of the valve body 11; the filter device 4 comprises a fixed shaft 41, and the outer side of the fixed shaft 41 is fixedly connected to the valve seat 12. A disc plate 42, a second disc plate 43 is fixedly connected to the outer side of the fixed shaft 41, a hard sealing surface 44 is fixedly connected to the outer side of the second disc plate 43, a filter plate 45 is snap-connected to the inner side of the fixed groove 13, the filter plate 45 includes a mounting plate 451, a mounting groove 452 is opened on the inner side of the mounting plate 451, a filter screen 453 is fixedly connected to the inner side of the mounting groove 452, and a filter cotton 454 is fixedly connected to the outer side of the filter screen 453; the bottom of the valve shaft 5 is rotatably connected to the inner side of the valve body 11, and one side of the filter plate 45 is tightly attached to the fixed shaft 41.

[0026] As a further implementation scheme of the above technical scheme: by setting the first disc plate 42 and the second disc plate 43, the first disc plate 42 and the second disc plate 43 are both arranged outside the fixed shaft 41, the first disc plate 42 and the second disc plate 43 are both semicircular in shape, the first disc plate 42 and the second disc plate 43 are staggered, and the first disc plate 42 and the second disc plate 43 are parallel to each other. Such an arrangement facilitates the staggered sealing of the first disc plate 42 and the second disc plate 43, and at the same time allows impurities in the fluid to pass through the filter device 4, preventing the impurities from being stuck between the first disc plate 42 and the second disc plate 43 and the valve seat 12, making it difficult to open or close the valve;

[0027] As a further implementation scheme of the above technical scheme: by setting a hard sealing surface 44, two hard sealing surfaces 44 are provided, the shape of the hard sealing surfaces 44 are both semicircular, and the hard sealing surfaces 44 are both arranged at the center position of the outer side of the first disc plate 42 and the second disc plate 43. The hard sealing surface 44 is in close contact with the inner side of the valve seat 12. Such a setting can make the overall structure more reasonable and can effectively achieve a sealing effect;

[0028] As a further implementation scheme of the above technical scheme: by setting the filter plate 45, there are two filter plates 45, the shape of the filter plates 45 are semicircular, the filter plates 45 are arranged inside the fixed groove 13, the filter plates 45 are staggered, the filter plates 45 are parallel to each other, the filter plates 45 are symmetrically arranged, and the filter plates 45 are fitted with the valve body 11 to facilitate filtering impurities;

[0029] As a further implementation scheme of the above technical scheme: by setting the fixing groove 13, there are two fixing grooves 13, the fixing grooves 13 are set in an arc shape, the fixing grooves 13 are symmetrically arranged, the fixing grooves 13 are arranged on the inner side of the valve body 11, the fixing grooves 13 are parallel to each other, the fixing grooves 13 correspond to the filter plate 45 one by one, and the set fixing grooves 13 can effectively fix the filter plate 45;

[0030] As a further implementation scheme of the above technical scheme: by setting the filter screen 453, two filter screens 453 are provided, the filter screens 453 are parallel to each other, the filter screens 453 are set in a semicircular shape, the filter screens 453 are symmetrically arranged inside the installation groove 452, and the center points of the two filter screens 453 are located on the same parallel line. The set filter screen 453 can allow impurities to accumulate on the inner side of the filter plate 45, preventing impurities from accumulating between the sealing surfaces, thereby causing the sealing surfaces to be unable to be in close contact;

[0031] As a further implementation scheme of the above technical scheme: by setting up filter cotton 454, the filter cotton 454 is set between the two filter screens 453, the filter cotton 454 is set at the center of the mounting plate 451, the filter cotton 454 and the two filter screens 453 are parallel to each other, the filter cotton 454 and the two filter screens 453 are equal in size and shape, the set filter cotton 454 can filter out solid particles in the fluid, so that the clean liquid can flow out through the micropores, while the solid impurities are trapped on the inner side of the filter plate 45, which can effectively prevent impurities from being stuck between the first disc plate 42 and the second disc plate 43 and the valve seat 12.

[0032] Working process: The operator rotates the valve shaft 5 of the butterfly valve 1 through the actuator on the control device 3, and drives the first disc plate 42 and the second disc plate 43 to rotate around the axis. When the first disc plate 42 and the second disc plate 43 rotate from 0° to 90°, the butterfly valve 1 is fully opened, and the medium in the pipeline can flow freely. The filter plate 45 will continue to be close to the fixed shaft 41 when the first disc plate 42 and the second disc plate 43 rotate, which can effectively achieve a better filtering effect. The filter plate 45 filters out solid particles in the fluid through the structure of its filter screen 453 and filter cotton 454, so that the clean liquid can flow out through the micropores, while the solid impurities The impurities are trapped on the inner side of the filter plate 45, which can effectively prevent the impurities from being stuck between the first disc plate 42, the second disc plate 43 and the valve seat 12, making it difficult to open or close the valve. The filter cotton 454 can prevent the impurities from accumulating between the sealing surfaces, thereby causing the sealing surfaces to be unable to contact closely, thereby causing the seal to fail. When the operator rotates the valve shaft 5 in the opposite direction through the actuator, the first disc plate 42 and the second disc plate 43 rotate around the axis and return from 90° to 0°. When the first disc plate 42 and the second disc plate 43 contact the valve seat 12, due to the three-eccentric design, a sealing effect begins to occur between the sealing surface of the valve plate and the valve seat 12.

[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. A triple-eccentric metal-sealed butterfly valve, comprising a butterfly valve (1), a packing sealing device (2) and a control device (3), characterized in that: The upper end of the butterfly valve (1) is fixedly connected to a packing seal device (2), the inner side of the packing seal device (2) is fixedly connected to a control device (3), the lower end of the control device (3) is fixedly connected to a valve shaft (5), and the outer side of the valve shaft (5) is fixedly connected to a filter device (4); The butterfly valve (1) comprises a valve body (11), a valve seat (12) is installed on the inner side of the center of the valve body (11), and a fixing groove (13) is provided on the inner side of the valve body (11); The filtering device (4) comprises a fixed shaft (41), a first disc plate (42) is fixedly connected to the outer side of the fixed shaft (41), a second disc plate (43) is fixedly connected to the outer side of the fixed shaft (41), a hard sealing surface (44) is fixedly connected to the outer side of the second disc plate (43), a filter plate (45) is snap-connected to the inner side of the fixed groove (13), the filter plate (45) comprises a mounting plate (451), a mounting groove (452) is provided on the inner side of the mounting plate (451), a filter screen (453) is fixedly connected to the inner side of the mounting groove (452), and a filter cotton (454) is fixedly connected to the outer side of the filter screen (453); The bottom of the valve shaft (5) is rotatably connected to the inner side of the valve body (11), and one side of the filter plate (45) is in close contact with the fixed shaft (41).

2. A triple eccentric metal sealing butterfly valve according to claim 1, characterized in that: The first disc plate (42) and the second disc plate (43) are both arranged outside the fixed shaft (41); the first disc plate (42) and the second disc plate (43) are both semicircular in shape; the first disc plate (42) and the second disc plate (43) are arranged in a staggered manner; and the first disc plate (42) and the second disc plate (43) are parallel to each other.

3. A triple eccentric metal sealing butterfly valve according to claim 1, characterized in that: Two hard sealing surfaces (44) are provided, and the shape of the hard sealing surfaces (44) is semicircular. The hard sealing surfaces (44) are arranged at the center position of the outer side of the first disc plate (42) and the second disc plate (43), and the hard sealing surfaces (44) are tightly attached to the inner side of the valve seat (12).

4. A triple eccentric metal sealing butterfly valve according to claim 1, characterized in that: Two filter plates (45) are provided, and the shape of the filter plates (45) are both semicircular. The filter plates (45) are both arranged inside the fixing groove (13). The filter plates (45) are arranged in a staggered manner. The filter plates (45) are parallel to each other, and the filter plates (45) are arranged symmetrically.

5. The triple eccentric metal sealing butterfly valve according to claim 1, characterized in that: Two fixing grooves (13) are provided. The fixing grooves (13) are arranged in an arc shape. The fixing grooves (13) are arranged symmetrically. The fixing grooves (13) are arranged on the inner side of the valve body (11). The fixing grooves (13) are parallel to each other. The fixing grooves (13) correspond to the filter plates (45) one by one.

6. A triple eccentric metal sealing butterfly valve according to claim 1, characterized in that: Two filter screens (453) are provided, the filter screens (453) are parallel to each other, the filter screens (453) are arranged in a semicircular shape, the filter screens (453) are arranged on the inner side of the installation groove (452) in a bilaterally symmetrical manner, and the center points of the two filter screens (453) are located on the same parallel line.

7. The triple eccentric metal sealing butterfly valve according to claim 1, characterized in that: The filter cotton (454) is arranged between the two filter screens (453), the filter cotton (454) is arranged at the center of the mounting plate (451), the filter cotton (454) and the two filter screens (453) are parallel to each other, and the filter cotton (454) and the two filter screens (453) are equal in size and shape.

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