CN219263205U

CN219263205U - Three-eccentric hard sealing butterfly valve

Info

Publication number: CN219263205U
Application number: CN202321250057.8U
Authority: CN
Inventors: 李建佩; 赵龙龙; 李靖; 程佳; 张二冰; 谷帅坤; 刘义; 程蕾
Original assignee: Xi'an Pump & Valve General Factory Co ltd
Current assignee: Xi'an Pump & Valve General Factory Co ltd
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-06-27
Anticipated expiration: 2033-05-23

Abstract

The application discloses a triple eccentric hard seal butterfly valve, which comprises a valve body, a valve seat and a valve plate assembly; the valve seat is arranged in the valve body, is integrally formed with the valve body, and is fixedly connected with an arc plate at one side of the valve seat, which is away from the valve body; the valve plate assembly comprises a butterfly plate, a J-shaped sealing ring, a sealing pressing plate, a C-shaped ring and screws; the outer side of the bending end of the J-shaped sealing ring can be respectively in sealing contact with the inner sides of the valve seat and the arc plate; the side surface of the butterfly plate, which is in contact with the J-shaped sealing ring, is provided with an annular groove, and the C-shaped ring is arranged in the annular groove and is abutted with the J-shaped sealing ring; the sealing pressing plate is detachably connected to the outer side of the butterfly plate through a screw, and the J-shaped sealing ring can be pressed on the outer side of the butterfly plate. The double-seal butterfly plate and valve seat double-seal butterfly plate is formed by installing the sealing ring, the efficiency of installing and detaching the sealing ring is improved, and meanwhile, the condition that the valve is not resistant to flushing when the valve is fully opened due to the fact that the sealing ring is used in multiple layers is avoided.

Description

Three-eccentric hard sealing butterfly valve

Technical Field

The application relates to the technical field of triple offset butterfly valves, in particular to a triple offset hard seal butterfly valve.

Background

The axis of the valve rod deviates from the center of the butterfly sheet and the center of the body at the same time, and the rotation axis of the valve seat and the axis of the valve body channel form a certain angle, which is called as a triple eccentric butterfly valve; the triple eccentric butterfly valve is widely used for metallurgical, electric power, petrochemical industry, water supply and drainage, municipal construction and other industrial pipelines with medium temperature less than or equal to 425 ℃ and is used for adjusting flow and carrying flow.

In the prior art, the shape and the angle of the sealing surface of the valve body and the sealing surface of the sealing ring are not matched in the actual work, so zero leakage cannot be realized, the original three-eccentric butterfly valve adopts a plurality of layers (stainless steel and graphite) as the sealing ring, but the original three-eccentric butterfly valve is not resistant to flushing when the valve is fully opened, the sealing effect is reduced after long-term flushing, and the original three-eccentric butterfly valve needs to be sequentially provided with a plurality of sealing rings when being provided with the plurality of layers as the sealing ring, thereby influencing the efficiency of installation and disassembly, and simultaneously, the double sealing effect between the butterfly plate and the valve seat can be realized by only installing one sealing ring.

Disclosure of Invention

This application is through providing a triple eccentric hard seal butterfly valve, triple eccentric butterfly valve among the solution prior art adopts multi-level as the sealing washer, it is multi-level not resistant to erode when leading to the valve to open entirely, need install a plurality of sealing washers in proper order when the installation moreover, influence the efficiency of installation and dismantlement, simultaneously not can just can realize the technical problem that forms dual seal's effect between butterfly plate and the disk seat through only installing a sealing washer, realized just can make to form dual seal between butterfly plate and the disk seat through installing a sealing washer, the efficiency of sealing washer installation and dismantlement has been improved, the condition that is not resistant to erode when having avoided adopting multi-level as the sealing washer to lead to the valve to open entirely simultaneously.

The three-eccentric hard sealing butterfly valve comprises a valve body, a valve seat and a valve plate assembly; the valve seat is arranged in the valve body and integrally formed with the valve body, and one side of the valve seat, which is away from the valve body, is fixedly connected with an arc plate; the valve plate assembly comprises a butterfly plate, a J-shaped sealing ring, a sealing pressing plate, a C-shaped ring and screws; the J-shaped sealing ring is sleeved on the periphery of the butterfly plate, and the outer side of the bent end of the J-shaped sealing ring can be respectively in sealing contact with the valve seat and the inner side of the arc-shaped plate; the side surface of the butterfly plate, which is in contact with the J-shaped sealing ring, is provided with an annular groove, and the C-shaped ring is arranged in the annular groove and is abutted with the J-shaped sealing ring; the sealing pressing plate is detachably connected to the outer side of the butterfly plate through the screw, and the J-shaped sealing ring can be pressed on the outer side of the butterfly plate.

In one possible implementation, a side of the valve seat facing away from the valve body is provided with a first conical surface; the outer side of the bending end of the J-shaped sealing ring is in sealing contact with the first conical surface; the sealing pressing plate is close to the outer side of the valve seat and provided with a second conical surface, and the second conical surface can be in contact with the first conical surface.

In one possible implementation, the J-seal ring includes a body and a hook; the end part of the hook body is fixedly connected with the body, and the thickness of the body is larger than that of the hook body; the outer side of the hook body, which is close to the end part of the body, is provided with a plurality of annular grooves.

In one possible implementation, a hardened coating is deposited on the side of the valve seat facing away from the valve body, and the hardness of the hardened coating is 40-50HRC; the outer side of the bent end of the J-shaped sealing ring is subjected to hardening treatment, and the hardness of the J-shaped sealing ring is 50-60HRC.

In one possible implementation, the J-shaped seal ring is made of titanium alloy.

One or more technical solutions provided in the present application have at least the following technical effects or advantages:

according to the valve plate assembly, the valve plate assembly comprises the butterfly plate, the J-shaped sealing ring, the sealing pressing plate, the C-shaped ring and the screw, the arc plate is arranged at the same time, the J-shaped sealing ring is sleeved on the periphery of the butterfly plate, the outer side of the bending end of the J-shaped sealing ring is respectively in sealing contact with the valve seat and the inner side of the arc plate, the butterfly plate and the valve seat can form double sealing through installing the J-shaped sealing ring, and when the medium pressure acts on the butterfly plate, the C-shaped ring, the butterfly plate, the J-shaped sealing ring and the screw are stressed integrally, the higher the pressure is, the stronger the elastic deformability of the C-shaped ring is, and the greater the pre-tightening specific pressure applied to the sealing surface between the J-shaped sealing ring and the butterfly plate is, so that the sealing effect of the J-shaped sealing ring is effectively improved; the three eccentric butterfly valve effectively solves the technical problems that a three eccentric butterfly valve in the prior art adopts a plurality of layers as sealing rings, so that the valve is not resistant to flushing in a plurality of layers when being fully opened, a plurality of sealing rings are required to be installed in sequence during installation, the efficiency of installation and disassembly is affected, and meanwhile, the double sealing effect between a butterfly plate and a valve seat can be achieved by installing only one sealing ring.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments of the present utility model or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a triple eccentric hard seal butterfly valve according to an embodiment of the disclosure;

fig. 2 is a partial enlarged view of the area a in fig. 1.

Reference numerals: 1-a valve body; 2-valve seat; 21-an arc plate; 22-a first conical surface; 23-hardening the clad layer; a 3-valve plate assembly; 31-butterfly plate; 311-an annular groove; 32-J-shaped sealing rings; 321-body; 322-hook body; 323-annular groove; 33-sealing press plates; 331-a second conical surface; a 34-C ring; 35-screws; 4-a valve rod; 5-flat key; 6-cylindrical pins.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the embodiments of the present utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

Referring to fig. 1-2, a triple eccentric hard seal butterfly valve provided in an embodiment of the present application includes a valve body 1, a valve seat 2, and a valve plate assembly 3; the valve seat 2 is arranged in the valve body 1 and is integrally formed with the valve body 1, and one side of the valve seat 2, which is away from the valve body 1, is fixedly connected with an arc-shaped plate 21; the valve plate assembly 3 comprises a butterfly plate 31, a J-shaped sealing ring 32, a sealing pressing plate 33, a C-shaped ring 34 and a screw 35; the J-shaped sealing ring 32 is sleeved on the periphery of the butterfly plate 31, and the outer side of the bent end of the J-shaped sealing ring 32 can be respectively in sealing contact with the valve seat 2 and the inner side of the arc-shaped plate 21; an annular groove 311 is formed in the side surface, which is in contact with the J-shaped sealing ring 32, of the butterfly plate 31, and a C-shaped ring 34 is arranged in the annular groove 311 and is abutted against the J-shaped sealing ring 32; the sealing pressing plate 33 is detachably connected to the outer side of the butterfly plate 31 through a screw 35, and can press the J-shaped sealing ring 32 to the outer side of the butterfly plate 31. In the embodiment of the application, the valve seat 2 and the valve body 1 are integrally formed, the arc-shaped sealing ring 21 is convexly arranged on the inner side of the valve seat 2 and integrally formed with the valve seat 2, the bent end of the J-shaped sealing ring 32 is coated on the outer side of the butterfly plate 31, and the bent end of the J-shaped sealing ring 32 can be respectively in sealing contact with the inner side of the arc-shaped sealing ring 21 and the inner side of the valve seat 2 through coating the J-shaped sealing ring 32, so that double sealing can be formed between the butterfly plate 31 and the valve seat 2 through only installing one J-shaped sealing ring 32, the sealing ring installing and dismantling efficiency is improved, and the sealing effect is improved; the cross section of the annular groove 311 is rectangular, the C-shaped ring 34 is made of a thin metal plate, elastic deformation can be generated when the C-shaped ring 34 is extruded, when medium pressure acts on the butterfly plate 31, the C-shaped ring 34, the butterfly plate 31, the J-shaped sealing ring 32 and the screw 35 are integrally stressed, the higher the pressure is, the stronger the elastic deformation capacity of the C-shaped ring 34 is, the larger the pre-tightening specific pressure applied to the sealing surface between the J-shaped sealing ring 32 and the butterfly plate 31 is, and the sealing effect of the J-shaped sealing ring 32 is effectively improved; when the butterfly valve is used, under the action of the driving device, the valve rod 4 is driven to rotate, then the valve rod 4 drives the butterfly plate 31 to rotate through the flat key 5 and the cylindrical pin 6, the rotation angle is 0-90 degrees, and when the butterfly plate 31 rotates for 0 degree, the valve is in the closed position; when the butterfly plate 31 rotates to 90 degrees, the valve is in the full-open position; and when the pressure is between 0 and 90 degrees, the valve can be used for regulating the medium flow.

Referring to fig. 2, the valve seat 2 is provided with a first conical surface 22 on the side facing away from the valve body 1; the outer side of the bent end of the J-shaped sealing ring 32 is in sealing contact with the first conical surface 22; the sealing pressure plate 33 is provided with a second conical surface 331 near the outside of the valve seat 2, and the second conical surface 331 can be in contact with the first conical surface 22. In the embodiment of the application, the first conical surface 22 is further formed on the valve seat 2, so that the J-shaped sealing ring 32 is in contact with the first conical surface 22, and when the J-shaped sealing ring 32 receives extrusion force, the first conical surface 22 is extruded, so that the purpose that the higher the pressure is, the larger the extrusion force between the J-shaped sealing ring 32 and the first conical surface 22 is, and the better the tightness is; in addition, the second conical surface 331 matched with the first conical surface 22 is arranged on the sealing pressing plate 33, so that the sealing pressing plate 33 is convenient to install, and meanwhile, in the opening and closing process of the butterfly plate 31, the butterfly plate 31 is convenient to open and close through sliding fit between the second conical surface 331 and the first conical surface 22.

Referring to fig. 2, the j-ring 32 includes a body 321 and a hook 322; the end part of the hook body 322 is fixedly connected with the body 321, and the thickness of the body 321 is larger than that of the hook body 322; the outer side of the end of the hook 322 near the body 321 is provided with a plurality of annular grooves 323. In the embodiment of the application, the J-shaped sealing ring 32 is specifically arranged and comprises a body 321 and a hook body 322, the body 321 and the hook body 322 are integrally formed, two annular grooves 323 are selected, and the flexibility of the J-shaped sealing ring 32 can be increased by adding the annular grooves 323, so that the J-shaped sealing ring is more easily attached to the sealing surface of the butterfly plate 31, and the sealing specific pressure is improved; in addition, the J-shaped sealing ring 32 in the embodiment of the application is made of titanium alloy, and the J-shaped sealing ring 32 is formed by processing by using a tool alone, so that the interchangeability of parts can be met, and the production efficiency is improved.

Referring to fig. 2, a hardened composite layer 23 is deposited on one side of the valve seat 2 away from the valve body 1, and the hardness of the hardened composite layer 23 is 40-50HRC; the outer side of the bent end of the J-shaped seal ring 32 is hardened to have a hardness of 50-60HRC. In the embodiment of the application, the hardness of the hardening composite layer 23 is 40-50HRC and the hardness of the hardening composite layer is 50-60HRC on the outer side of the bent end of the J-shaped sealing ring 32, so that scratches on the surfaces of the J-shaped sealing ring 32 and the valve seat 2 can not occur under the severe working condition containing dust and particles, the sealing reliability of the valve is ensured, and the service life is prolonged.

In this specification, each embodiment is described in a progressive manner, and the same or similar parts of each embodiment are referred to each other, and each embodiment is mainly described as a difference from other embodiments.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the present application; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions.

Claims

1. The three-eccentric hard sealing butterfly valve is characterized by comprising a valve body (1), a valve seat (2) and a valve plate assembly (3);

the valve seat (2) is arranged in the valve body (1) and is integrally formed with the valve body (1), and one side of the valve seat (2) deviating from the valve body (1) is fixedly connected with an arc-shaped plate (21);

the valve plate assembly (3) comprises a butterfly plate (31), a J-shaped sealing ring (32), a sealing pressing plate (33), a C-shaped ring (34) and screws (35);

the J-shaped sealing ring (32) is sleeved on the periphery of the butterfly plate (31), and the outer side of the bent end of the J-shaped sealing ring (32) can be respectively in sealing contact with the inner sides of the valve seat (2) and the arc plate (21);

an annular groove (311) is formed in the side surface, which is in contact with the J-shaped sealing ring (32), of the butterfly plate (31), and the C-shaped ring (34) is arranged in the annular groove (311) and is abutted against the J-shaped sealing ring (32);

the sealing pressing plate (33) is detachably connected to the outer side of the butterfly plate (31) through the screw (35), and the J-shaped sealing ring (32) can be pressed on the outer side of the butterfly plate (31).

2. The triple offset hard seal butterfly valve according to claim 1, characterized in that a side of the valve seat (2) facing away from the valve body (1) is provided with a first conical surface (22);

the outer side of the bent end of the J-shaped sealing ring (32) is in sealing contact with the first conical surface (22);

the sealing pressing plate (33) is close to the outer side of the valve seat (2) and provided with a second conical surface (331), and the second conical surface (331) can be in contact with the first conical surface (22).

3. The triple offset hard seal butterfly valve of claim 1, wherein the J-seal ring (32) comprises a body (321) and a hook (322);

the end part of the hook body (322) is fixedly connected with the body (321), and the thickness of the body (321) is larger than that of the hook body (322);

the outer side of the end part of the hook body (322) close to the body (321) is provided with a plurality of annular grooves (323).

4. The triple eccentric hard sealing butterfly valve according to claim 1, characterized in that the side of the valve seat (2) facing away from the valve body (1) is surfacing-welded with a hardened coating (23), the hardness of the hardened coating (23) being 40-50HRC;

the outer side of the bent end of the J-shaped sealing ring (32) is subjected to hardening treatment, and the hardness of the J-shaped sealing ring is 50-60HRC.

5. The triple offset hard seal butterfly valve of claim 1 wherein the J-shaped seal ring (32) is a titanium alloy.