High-sealing-performance three-eccentric center butterfly valve with adjustable valve seat

Abstract

The utility model discloses a three-eccentric center butterfly valve with an adjustable valve seat and relates to the technical field of three-eccentric center butterfly valves, the three-eccentric center butterfly valve comprises a valve body and an auxiliary assembly, a valve clack is arranged in the valve body, and the auxiliary assembly used for avoiding abrasion and improving sealing performance is arranged on the outer side of the valve clack. And the auxiliary assembly comprises a valve seat ring, a mounting groove, a sealing ring, an expansion bag and a connecting strip, the mounting groove is formed in the inner side of the valve seat ring, the sealing ring is arranged on the inner side of the mounting groove, the expansion bag is mounted on the outer side of the sealing ring, and the outer side of the expansion bag is connected with the connecting strip. According to the high-sealing-performance three-eccentric center butterfly valve with the adjustable valve seat, the sealing ring and the expansion bag are installed in the valve seat ring through the installation groove, the annular expansion bag expands to push and extrude the sealing ring when the valve clack is closed, so that the inner wall of the sealing ring and the side of the valve clack are connected more tightly, the valve body has high sealing performance, and when the valve clack is opened, the sealing ring is not prone to falling off. And the expansion bag is correspondingly deflated, so that the abrasion of the valve clack during rotating opening is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to three eccentric butterfly valve technical field, concretely is a kind of high sealing property valve seat adjustable three eccentric butterfly valve. BACKGROUND

[0002] The butterfly valve is a kind of valve that is opened and closed by the rotation of valve plate, and it is simple in structure, small in size and quick in opening and closing, and it can be opened and closed once by rotating the valve plate 90° through the valve shaft, so it is used more and more widely in many occasions. The butterfly valve is usually composed of valve body, valve shaft, valve plate and sealing pair, and the sealing pair is arranged between the outer periphery of disc-shaped valve plate and the valve body. The structure, shape and size of the sealing pair are the key to determine the sealing performance and service life of the butterfly valve. At present, there are many structure forms of butterfly valves, such as center sealing, single eccentric sealing, double eccentric sealing and three eccentric sealing. Although various sealing structure forms have corresponding performance advantages.

[0003] For example, the utility model with application number CN202222856622.7 belongs to the technical field of three eccentric butterfly valves, and specifically relates to a three eccentric butterfly valve. The utility model can push the clamping block into the inside of the limiting cover to limit the sealing ring by the elastic force of spring one, and when the sealing ring needs to be replaced, the clamping block only needs to be separated from the limiting cover to release the limitation on the sealing ring, so that the sealing ring can be more easily disassembled when it needs to be replaced. However, in the existing opening and closing process, serious friction is generated due to relative movement, and the sealing performance of the valve disc after wear is decreased, resulting in poor sealing effect.

[0004] Therefore, in view of the above problems, the existing structure and defects are improved, and a high sealing property valve seat adjustable three eccentric butterfly valve is provided. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a high sealing property valve seat adjustable three eccentric butterfly valve to solve the problems in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a high sealing property valve seat adjustable three eccentric butterfly valve, comprising a valve body and an auxiliary assembly, the inside of the valve body is provided with a valve disc, the auxiliary assembly for avoiding wear and increasing sealing is arranged on the outside of the valve disc, and the auxiliary assembly comprises a valve seat ring, a mounting groove, a sealing ring, an expansion capsule and a connecting strip, the inside of the valve seat ring is provided with a mounting groove, and the inside of the mounting groove is provided with a sealing ring, the outside of the sealing ring is provided with an expansion capsule, and the outside of the expansion capsule is connected with a connecting strip.

[0007] Further, the diameter size of the mounting groove and the sealing ring is consistent, and the sealing ring and the expansion capsule are tightly attached.

[0008] Furthermore, a bottom plate is connected to the lower end of the valve body, and a mounting platform is installed on the upper end of the valve body.

[0009] Furthermore, a valve stem is provided inside the mounting platform, and a top plate is connected to the top of the valve stem.

[0010] Furthermore, a fixing cap is installed on the top of the top plate, and a handle is connected to the side of the fixing cap.

[0011] Furthermore, the top plate is provided with a limiting component for limiting the position, and the limiting component includes a fixing ring and fixing teeth, with fixing teeth installed on the outer side of the fixing ring.

[0012] Furthermore, the limiting component also includes a limiting rod and a mounting hole. The limiting rod is provided on the outer side of the fixing tooth, and the mounting hole is provided on the outer side of the end of the limiting rod.

[0013] Furthermore, the top plate and the fixing ring are connected by a sleeve, and the fixing ring and the fixing teeth are fixedly connected.

[0014] This utility model provides a high-sealing adjustable seat triple eccentric butterfly valve, which has the following beneficial effects:

[0015] 1. This utility model uses an installation groove for mounting the sealing ring and expansion bladder inside the valve seat ring. When the valve disc is closed, the annular expansion bladder expands and pushes the sealing ring, making the inner wall of the sealing ring and the side of the valve disc more tightly connected, thus giving the valve body high sealing performance. When the valve disc is opened, the expansion bladder releases air accordingly, thereby reducing the wear of the valve disc when it is rotated open.

[0016] 2. This utility model uses a fixed cap and valve stem for fixed connection. The handle rotates the fixed cap to drive the rotation of the valve stem and valve disc. The mounting hole allows the limiting rod to be installed at the bottom of the fixed cap. The limiting rod rotates inside the fixing teeth as the fixed cap rotates. The triangular ring-shaped fixing teeth prevent the fixed cap from rotating in the opposite direction after rotation and sealing, which would cause loosening and affect the sealing. The detachable limiting rod allows the fixed cap and valve stem to continue to rotate after removal. Attached Figure Description

[0017] Fig. 1 This is a schematic diagram of the overall structure of a high-sealing adjustable seat triple eccentric butterfly valve according to this utility model.

[0018] Fig. 2 This is a schematic diagram of the auxiliary component structure of a high-sealing adjustable seat triple eccentric butterfly valve according to this utility model.

[0019] Fig. 3 This is a schematic diagram of the limiting component structure of a high-sealing adjustable triple eccentric butterfly valve according to this utility model.

[0020] In the figure: 1, valve body; 2, valve flap; 3, auxiliary assembly; 301, valve seat ring; 302, mounting groove; 303, sealing ring; 304, expansion capsule; 305, connecting strip; 4, bottom interface disc; 5, mounting table; 6, valve rod; 7, top disc; 8, fixing cap; 9, handle; 10, limiting assembly; 1001, fixing ring; 1002, fixing tooth; 1003, limiting rod; 1004, mounting hole. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0022] As shown in Fig. 1 and Fig. 2 A high-sealing valve seat adjustable three-eccentric butterfly valve, comprising a valve body 1 and an auxiliary assembly 3, the inside of the valve body 1 is provided with a valve flap 2, the auxiliary assembly 3 for increasing the sealing property to avoid wear is arranged on the outside of the valve flap 2, and the auxiliary assembly 3 comprises a valve seat ring 301, a mounting groove 302, a sealing ring 303, an expansion capsule 304 and a connecting strip 305, the inside of the valve seat ring 301 is provided with the mounting groove 302, the mounting groove 302 is used for mounting the sealing ring 303 and the expansion capsule 304 inside the valve seat ring 301, the inside of the mounting groove 302 is provided with the sealing ring 303, the outside of the sealing ring 303 is mounted with the expansion capsule 304, and the outside of the expansion capsule 304 is connected with the connecting strip 305, the annular expansion capsule 304 expands when the valve flap 2 is closed to push the sealing ring 303, so that the inner wall of the sealing ring 303 and the side of the valve flap 2 are more closely connected, so that the valve body 1 has high sealing property, the diameter size of the mounting groove 302 and the sealing ring 303 is consistent, and the sealing ring 303 and the expansion capsule 304 are closely attached, when the valve flap 2 is opened, the expansion capsule 304 is correspondingly deflated to reduce the wear of the valve flap 2 when it is rotated and opened, the lower end of the outside of the valve body 1 is connected with a bottom interface disc 4, and the upper end of the outside of the valve body 1 is mounted with a mounting table 5, the inside of the mounting table 5 is provided with a valve rod 6, and the top of the valve rod 6 is connected with a top disc 7.

[0023] As shown in Fig. 3As shown, the top of the top disc 7 is provided with a fixed cap 8, the fixed cap 8 is fixedly connected with the valve rod 6, and the side of the fixed cap 8 is connected with a handle 9, the handle 9 drives the rotation of the fixed cap 8 to control the rotation of the valve rod 6 and the valve disc 2, the outside of the top disc 7 is provided with a limiting assembly 10 for limiting, and the limiting assembly 10 comprises a fixed ring 1001 and a fixed tooth 1002, the outside of the fixed ring 1001 is provided with the fixed tooth 1002, the triangular annular fixed tooth 1002 avoids the reverse rotation of the fixed cap 8 after rotation to cause loosening and affect the sealing degree, the limiting assembly 10 further comprises a limiting rod 1003 and a mounting hole 1004, the outside of the fixed tooth 1002 is provided with the limiting rod 1003, the limiting rod 1003 rotates in the inside of the fixed tooth 1002 along with the rotation of the fixed cap 8, the detachable limiting rod 1003 can continue to rotate the fixed cap 8 and the valve rod 6 after being removed, and the outside of the end of the limiting rod 1003 is provided with the mounting hole 1004, the mounting hole 1004 enables the limiting rod 1003 to be mounted at the bottom of the fixed cap 8, and the top disc 7 and the fixed ring 1001 are in sleeve connection, and the fixed ring 1001 and the fixed tooth 1002 are in fixed connection.

[0024] In summary, the high-sealing butterfly valve with adjustable three eccentricity can be used according to the structure shown in the specification. Figs. 1-3 As shown in the structure, when in use, the handle 9 is rotated to rotate the fixed cap 8 to control the opening and closing of the valve rod 6 and the valve disc 2, after the valve disc 2 is rotated to close, the inflation bag 304 in the mounting groove 302 is inflated to expand, the annular inflation bag 304 expands to push the sealing ring 303, the inner wall of the sealing ring 303 and the side of the valve disc 2 are more closely connected, and the valve body 1 has high sealing performance, when the valve disc 2 is opened, the inflation bag 304 is deflated to reduce the abrasion of the valve disc 2 when being rotated to open, and when the fixed cap 8 is rotated, the limiting rod 1003 rotates in the inside of the fixed tooth 1002 along with the rotation of the fixed cap 8, the triangular annular fixed tooth 1002 avoids the reverse rotation of the fixed cap 8 after rotation to cause loosening and affect the sealing degree, when the valve disc 2 is opened, the limiting rod 1003 is removed from the mounting hole 1004, and the fixed cap 8 and the valve rod 6 can continue to rotate.

[0025] The embodiments of the present application are given for the purpose of example and description, and are not exhaustive or limit the present application to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical application of the present application, and to enable those skilled in the art to understand the present application so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A high sealing seat adjustable triple offset butterfly valve comprising a valve body (1) and an auxiliary assembly (3), characterized in that, The inside of the valve body (1) is provided with a valve clack (2), the auxiliary assembly (3) for avoiding abrasion and increasing sealing is arranged outside the valve clack (2), and the auxiliary assembly (3) comprises a valve seat ring (301), a mounting groove (302), a sealing ring (303), an expansion capsule (304) and a connecting strip (305), the inside of the valve seat ring (301) is provided with the mounting groove (302), the inside of the mounting groove (302) is provided with the sealing ring (303), the outside of the sealing ring (303) is provided with the expansion capsule (304), and the outside of the expansion capsule (304) is connected with the connecting strip (305).

2. The high sealing seat adjustable three eccentric butterfly valve according to claim 1, characterized in that, The diameter of the mounting groove (302) and the sealing ring (303) is consistent, and the sealing ring (303) and the expansion capsule (304) are tightly fitted.

3. The high sealing seat-adjustable three-eccentric butterfly valve according to claim 1, characterized in that, The lower end of the outside of the valve body (1) is connected with a bottom connecting disc (4), and the upper end of the outside of the valve body (1) is provided with a mounting table (5).

4. The high sealing seat-adjustable type triple offset butterfly valve according to claim 3, characterized in that, The inside of the mounting table (5) is provided with a valve rod (6), and the top of the valve rod (6) is connected with a top disc (7).

5. The high sealing seat-adjustable three-eccentric butterfly valve according to claim 4, characterized in that, The top of the top disc (7) is provided with a fixed cap (8), and the side of the fixed cap (8) is connected with a handle (9).

6. The high sealing seat-adjustable type triple offset butterfly valve according to claim 4, characterized in that, The outside of the top disc (7) is provided with a limiting assembly (10) for limiting, and the limiting assembly (10) comprises a fixed ring (1001) and a fixed tooth (1002), the outside of the fixed ring (1001) is provided with the fixed tooth (1002).

7. The high sealing seat-adjustable three-eccentric butterfly valve according to claim 6, characterized in that, The limiting assembly (10) further comprises a limiting rod (1003) and a mounting hole (1004), the outside of the fixed tooth (1002) is provided with the limiting rod (1003), and the outside of the end of the limiting rod (1003) is provided with the mounting hole (1004).

8. The high sealing seat-adjustable three-eccentric butterfly valve according to claim 6, characterized in that, The top disc (7) and the fixed ring (1001) are connected in a sleeved manner, and the fixed ring (1001) and the fixed tooth (1002) are fixedly connected.

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