CN219809453U - Rotary-opening check valve for heating and ventilation system - Google Patents

Abstract

The utility model discloses a swing check valve for a heating and ventilation system, and belongs to the technical field of check valves. Mainly comprises a check valve body; a valve seat mounted on the check valve body, the valve seat having a material flow passage for material delivery; the sealing assembly is arranged in the check valve body, is provided with a rotating mechanism and a valve clack for opening or closing the material flow passage under the drive of the rotating mechanism, and is provided with a sealing ring at the joint of the material flow passage and the sealing assembly, and the sealing ring is suitable for being attached to the valve clack together so as to play a sealing role. According to the swing check valve for the heating and ventilation system, the spring and the compression ring are arranged on the sealing ring, so that opposite thrust can be generated on the valve clack when the valve clack is closed, a buffer effect is achieved, impact of the valve clack on the sealing ring is reduced, and the problem that the sealing surface is damaged due to the fact that water hammer is formed to hit the sealing surface due to the thrust generated by the valve clack when materials flow reversely is solved.

Description

Rotary-opening check valve for heating and ventilation system

Technical Field

The utility model relates to the technical field of check valves, in particular to a swing check valve for a heating and ventilation system.

Background

The rotary opening check valve is also called a check valve, is an automatic valve for preventing the material from flowing backwards on a unidirectional flow pipeline, and can be opened or closed by the pressure of the material flowing in the pipeline, and can be divided into a single-flap type valve, a double-flap type valve and a multi-flap type valve, and belongs to one of the valves which are commonly used.

The utility model patent of publication No. CN 215980986U specifically discloses a swing flange check valve, through being provided with connecting block and valve clack on the valve body, makes the valve clack open when the material is downstream, closes in the time of countercurrent to be provided with sealed pad at the contact surface of liquid passageway and valve clack, thereby improved sealed effect, made the material can not flow backwards.

In the above-mentioned patent publication, although the material is prevented from flowing backwards, when the valve clack is closed, the valve clack forms a water hammer to the sealing surface due to the thrust generated when the material flows backwards, so that the sealing surface is damaged, the material is leaked, and the service life of the valve body is reduced, so that it is necessary to provide a swing check valve for a heating ventilation system to solve the above-mentioned problems.

It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and, therefore, it may contain information that does not constitute prior art.

Disclosure of Invention

Based on the above problems existing in the prior art, the present utility model aims to solve the problems: the rotary opening check valve for the heating ventilation system solves the problem that when the valve clack is closed, water hammer is formed to hit the sealing surface due to thrust generated when materials flow reversely, so that the sealing surface is damaged.

The technical scheme adopted for solving the technical problems is as follows: a swing check valve for a hvac system comprising: a check valve body; a valve seat mounted on the check valve body, the valve seat having a material flow path for material delivery; the sealing assembly is arranged in the check valve body, the sealing assembly is provided with a rotating mechanism and a valve clack for opening or closing the material flow passage under the drive of the rotating mechanism, a sealing ring is arranged at the joint of the material flow passage and the sealing assembly, and the sealing ring is suitable for being attached to the valve clack so as to play a sealing role; the valve clack is characterized in that a spring and a compression ring are arranged in the sealing ring, and the spring and the compression ring are suitable for buffering the valve clack when the check valve body is closed.

Further, a groove for installing the spring is formed in the sealing ring, and one end, away from the groove, of the spring is provided with the compression ring.

Further, the rotating mechanism comprises a supporting frame arranged in the check valve body, a fixed shaft is arranged on the supporting frame, and a moving column is arranged on a bearing on the fixed shaft.

Further, the motion column is connected with the valve clack, and the valve clack is suitable for rotating under the drive of the rotating mechanism according to the flowing direction of the materials.

Further, a valve cover is arranged on the check valve body, and a sealing gasket is arranged at the installation position of the valve cover and the check valve body.

Furthermore, magnetic rubber is arranged at the joint of the sealing ring and the valve clack.

The beneficial effects of the utility model are as follows: according to the swing check valve for the heating and ventilation system, the spring and the compression ring are arranged on the sealing ring, so that opposite thrust can be generated on the valve clack when the valve clack is closed, a buffer effect is achieved, impact of the valve clack on the sealing ring is reduced, and the problem that the sealing surface is damaged due to the fact that water hammer is formed to hit the sealing surface due to the thrust generated by the valve clack when materials flow reversely is solved.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is an overall schematic diagram of a swing check valve for a heating and ventilation system according to the present utility model;

FIG. 2 is a schematic cross-sectional view of the overall structure of FIG. 1;

FIG. 3 is a partial schematic view of FIG. 2 at A;

wherein, each reference sign in the figure:

1. a check valve body; 2. a valve cover; 3. a flange; 4. a valve seat; 5. a hexagonal bolt; 6. a material flow passage; 7. a seal assembly; 71. a seal ring; 72. a valve flap; 73. a motion column; 74. a fixing bolt; 75. a fixed shaft; 76. a support frame; 8. a spring; 9. and a compression ring.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As shown in fig. 1-3, the present utility model provides a swing check valve for a heating and ventilation system, which comprises a check valve body 1, a valve seat 4 and a sealing assembly 7, wherein the valve seat 4 is installed on the check valve body 1, the valve seat 4 is used for conveying materials, the sealing assembly 7 is used for opening or closing the check valve body 1, and a rotating mechanism (not shown in the drawings) is arranged in the sealing assembly 7;

in the utility model, the whole check valve body 1 is made of 316L stainless steel, and has certain corrosion resistance while resisting high temperature;

the flange 3 is fixedly arranged on two sides of the valve seat 4, the flange 3 is provided with a material flow passage 6 which is convenient for conveying materials, the flange 3 is connected with other pipelines, so that the materials are conveyed into the valve seat 4 through the material flow passage 6 on one side and conveyed out of the valve seat 4 through the material flow passage 6 on the other side, meanwhile, a sealing assembly 7 is arranged in the valve seat 4, and a sealing ring 71 is arranged at the joint of the material flow passage 6 and the sealing assembly 7;

wherein: the joint of the sealing ring 71 and the sealing assembly 7 has a certain inclination, and a through hole matched with the material flow channel 6 is formed in the sealing ring 71;

the sealing assembly 7 comprises a support frame 76 arranged on the check valve body 1, the support frame 76 is arranged in the vertical direction, a fixed shaft 75 is arranged on the support frame 76, a moving column 73 is arranged on the fixed shaft 75 in a bearing way, one end of the moving column 73, which is far away from the support frame 76, is connected with a valve clack 72, a through hole is formed in the moving column 73, a deep hole with a corresponding aperture is formed in the valve clack 72 connected with the moving column 73, threads are arranged in the through hole in the moving column 73 and the deep hole in the valve clack 72, and a fixing bolt 74 matched with the threads is arranged on the moving column 73, so that the moving column 73 and the valve clack 72 are connected together through the fixing bolt 74 in a threaded way;

wherein the supporting frame 76, the fixed shaft 75, the fixed bolt 74 and the moving column 73 form a rotating mechanism;

in order that the sealing assembly 7, when closed, does not damage the sealing surface due to the water hammer formed by the countercurrent flow of material;

as shown in fig. 2-3, at this time, the sealing assembly 7 is in a closed state, the valve clack 72 is attached to the sealing ring 71, and because the attached position contains a certain inclination, the valve clack 72 is always pressed against the sealing ring 71 under the driving of self gravity, and magnetic rubber is arranged at the attached position of the valve clack 72 and the sealing ring 71, so that the sealing ring 71 and the valve clack 72 are attracted, the attraction between the sealing ring 71 and the valve clack 72 is smaller than the force of the material flowing through, so that the valve clack 72 can be pushed by the material when the check valve body 1 is opened, the valve clack 72 and the sealing ring 71 can be tightly attached together when the check valve body 1 is closed, thereby improving the tightness of the check valve body 1, meanwhile, a groove (not marked in the figure) is formed in the sealing ring 71, a spring 8 is arranged in the groove, and a pressing ring 9 is arranged at one end of the spring 8 far from the groove, in the utility model, the pressing ring 9 is made of fluororubber;

when the valve clack 72 is closed, the material flowing along the closing direction of the valve clack 72 can generate thrust to the valve clack 72 so as to smash the valve clack 72 to the sealing ring 71, and when the valve clack 72 is contacted with the compression ring 9, the spring 8 in the groove of the sealing ring 71 can be driven to a compressed state, so that the valve clack 72 is subjected to opposite thrust, and a buffer effect is further achieved, so that the valve clack 72 can not impact the sealing ring 71, and the sealing surface is damaged;

in order to clean impurities in the check valve body 1 conveniently, the check valve body 1 is provided with a valve cover 2, the valve cover 2 is provided with a plurality of groups of through holes, threads are arranged in the valve cover 2, and a hexagonal bolt 5 matched with the threads is further arranged on the valve cover 2, so that the valve cover 2 is arranged on the check valve body 1 through the hexagonal bolt 5, and meanwhile, a sealing gasket (not shown in the figure) which is made of the same material as a sealing ring 71 is arranged at the installation position of the valve cover 2 and the check valve body 1, so that materials cannot leak out through the installation position of the valve cover 2 and the check valve body 1;

the opening or closing of the check valve body 1 will be specifically described below;

for convenience of description, the flow direction of the material is defined below, and when the material flows from left to right in the material flow channel 6, the material is referred to as forward flow, and conversely, the material is referred to as backward flow;

when the flange 3 is connected with an external pipeline, the material flows into the valve seat 4, the valve clack 72 rotates around the anticlockwise direction under the thrust of the material, the valve clack 72 is separated from the sealing ring 71, the rotation angle of the valve clack 72 can be changed along with the flow speed of the material until the moving column 73 contacts with the valve seat 4, at the moment, the rotation angle of the valve clack 72 is the maximum, the flow speed of the material is the maximum, and the check valve body 1 is in an open state;

when the material is in countercurrent, the valve clack 72 rotates clockwise under the thrust of the material, the flow speed of the material is the maximum value, the rotation speed of the valve clack 72 is the maximum value, meanwhile, the valve clack 72 can generate larger force to approach the sealing ring 71, when the valve clack 72 is in contact with the compression ring 9, the spring 8 in the groove of the sealing ring 71 can be driven to a compressed state, so that the valve clack 72 is subjected to opposite thrust, a buffer effect is further achieved, the valve clack 72 is attached to the sealing ring 71 with smaller force and is sucked together, and therefore the material is prevented from passing in countercurrent, and at the moment, the check valve body 1 is in a closed state.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (6)

1. A swing check valve for a heating ventilation system, characterized in that: comprising the following steps:

a check valve body (1);

a valve seat (4), the valve seat (4) being mounted on the check valve body (1), the valve seat (4) having a material flow passage (6) for material transport;

the sealing assembly (7) is arranged in the check valve body (1), the sealing assembly (7) is provided with a rotating mechanism, and a valve clack (72) of the material flow passage (6) is opened or closed under the drive of the rotating mechanism, a sealing ring (71) is arranged at the joint of the material flow passage (6) and the sealing assembly (7), and the sealing ring (71) is suitable for being attached to the valve clack (72) to play a sealing role;

wherein: a spring (8) and a compression ring (9) are arranged in the sealing ring (71), and the spring (8) and the compression ring (9) are suitable for buffering the valve clack (72) when the check valve body (1) is closed.

2. A swing check valve for a hvac system according to claim 1, wherein: the sealing ring (71) is internally provided with a groove for installing the spring (8), and one end, far away from the groove, of the spring (8) is provided with the compression ring (9).

3. A swing check valve for a hvac system according to claim 1, wherein: the rotary mechanism comprises a supporting frame (76) arranged in the check valve body (1), a fixed shaft (75) is arranged on the supporting frame (76), and a moving column (73) is arranged on the fixed shaft (75) through a bearing.

4. A swing check valve for a hvac system according to claim 3, wherein: the motion column (73) is connected with the valve clack (72), and the valve clack (72) is suitable for rotating under the drive of the rotating mechanism according to the flowing direction of materials.

5. A swing check valve for a hvac system according to claim 1, wherein: the check valve is characterized in that a valve cover (2) is arranged on the check valve body (1), and a sealing gasket is arranged at the installation position of the valve cover (2) and the check valve body (1).

6. A swing check valve for a hvac system according to claim 1, wherein: magnetic rubber is arranged at the joint of the sealing ring (71) and the valve clack (72).