A composite quick-release quick-suction air valve

Abstract

The utility model discloses a composite formula quick -release quick -suction air valve, including valve body, valve cover, main valve half device and three function automatic air valve subassembly, the flange interface for connecting pipeline is equipped with on valve body surface, valve cover is fixedly connected with valve body, main valve half device includes valve half, valve rod and friction damper, and valve rod one end is connected valve half, and the other end mobilely penetrates valve cover, and friction damper sets up at the penetration of valve rod and valve cover, is used for providing motion damping, three function automatic air valve subassembly installs on valve cover, including a spring -loaded automatic air valve and a stop valve for isolating the automatic air valve, and automatic air valve inside is equipped with big orifice, medium orifice and small orifice.

Description

Technical Field

[0001] This utility model belongs to the field of heat treatment technology, and more specifically, it relates to a composite fast exhaust and fast intake air valve. Background Technology

[0002] In large-scale water supply, drainage, or other fluid pipeline systems, air accumulation inside the pipes can create airlocks, reducing transport efficiency and even causing serious accidents such as water hammer, pipe vibration, or collapse. Therefore, air valves need to be installed at high points in the pipeline to quickly expel large amounts of air when the pipeline is filled with water, quickly draw in air to protect the pipeline when it is emptied or under negative pressure, and expel any small amounts of air released during pressurized system operation.

[0003] Existing air valves often have limited functionality or poor integration of exhaust and suction functions, resulting in slow response times. Under high flow conditions, they may not provide sufficient exhaust or suction cross-sections, posing a risk of inadequate pipeline protection. Furthermore, if the valve disc closes via a hard impact, it can easily damage the seals, causing leaks and affecting the valve's lifespan. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a composite quick exhaust and quick intake air valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a composite quick-exhaust and quick-intake air valve, comprising a valve body, a valve cover, a main valve disc device, and a three-function automatic air valve assembly; the valve body surface is provided with a flange interface for connecting a pipeline; the valve cover is fixedly connected to the valve body; the main valve disc device includes a valve disc, a valve stem, and a friction damper, one end of the valve stem is connected to the valve disc, and the other end movably passes through the valve cover; the friction damper is disposed at the penetration point between the valve stem and the valve cover to provide motion damping; the three-function automatic air valve assembly is mounted on the valve cover and includes a spring-loaded automatic air valve and a shut-off valve for isolating the automatic air valve; the automatic air valve has a large orifice, a medium orifice, and a small orifice inside.

[0006] Preferably, the valve body and valve cover are made of welded steel S235JRG2.

[0007] Preferably, the inner and outer surfaces of the valve body and valve cover are provided with an epoxy coating.

[0008] Preferably, the valve body of the automatic air valve is made of ductile iron EN-GJS-400-15.

[0009] Preferably, the shut-off valve is a butterfly valve.

[0010] This utility model provides a composite quick exhaust and quick intake air valve, which has the following beneficial effects: 1. High integration of multiple functions: The large-diameter rapid air intake and exhaust function and the micro exhaust function are integrated through a three-function automatic air valve component, which has a compact structure and complete functions.

[0011] 2. Fast response and large flow capacity: The large cross-section orifice design ensures that a large amount of air can be instantly drawn in or discharged when negative or positive pressure occurs in the pipeline, effectively preventing pipeline collapse or bursting.

[0012] 3. Smooth operation and long service life: The use of a friction damper to achieve soft closure of the valve disc greatly reduces water hammer impact and wear on the sealing surface, thereby improving the service life and reliability of the valve. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] In the diagram, 1 is the valve body; 2 is the valve cover; 3 is the valve disc; 4 is the valve stem; 5 is the friction damper; 6 is the three-function automatic air valve assembly; 6a is the automatic air valve; and 6b is the shut-off valve. Detailed Implementation

[0015] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0016] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Please see Figure 1This utility model provides a technical solution: a composite quick exhaust and quick intake air valve, mainly including valve body 1, valve cover 2, main valve disc 3, valve stem 4, friction damper 5 and three-function automatic air valve assembly 6.

[0019] The lower end of the valve body 1 is equipped with a flange interface conforming to EN1092-2 standard for connecting to pipelines. The valve cover 2 is fastened to the valve body 1 by Bunit bolts. The valve disc 3 is located inside the cavity of the valve body 1. The upper end of the valve stem 4 passes through a hole in the valve cover 2, where a friction damper 5 is installed. It slows down the movement speed of the valve stem 4 through friction, thereby achieving slow and smooth closing of the valve disc 3.

[0020] The three-function automatic air valve assembly 6 is mounted on top of the valve cover 2 via a flange. This assembly includes an automatic air valve 6a and a butterfly valve as a shut-off valve 6b. The automatic air valve 6a contains a float (not shown in detail in the figure) that, under the action of a spring, automatically controls the opening and closing of the large, medium, and small orifices according to changes in the liquid level and pressure within the valve.

[0021] Working principle: When the pipeline is emptied and filled with water, the air inside the valve is compressed by the water flow, opening the main valve disc 3, and a large amount of air is quickly discharged through the outlet of valve body 1. Simultaneously, if the pressure inside the valve increases, the large orifice of the automatic air valve also participates in venting. When the pipeline is emptied and negative pressure is generated, atmospheric pressure pushes open the main valve disc 3, and a large amount of air rapidly enters the pipeline. After the system is running normally, the main valve disc 3 closes, and the small amount of air released is continuously discharged through the small orifice of the automatic air valve 6a. The shut-off valve 6b is normally open and is only closed when maintenance of the automatic air valve 6a is required.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A composite quick-exhaust and quick-intake air valve, characterized in that: The system includes a valve body (1), a valve cover (2), a main valve disc assembly, and a three-function automatic air valve assembly (6). The valve body (1) has a flange interface for connecting to a pipeline on its surface. The valve cover (2) is fixedly connected to the valve body (1). The main valve disc assembly includes a valve disc (3), a valve stem (4), and a friction damper (5). One end of the valve stem (4) is connected to the valve disc (3), and the other end movably passes through the valve cover (2). The friction damper (5) is located at the point where the valve stem (4) and the valve cover (2) pass through each other to provide motion damping. The three-function automatic air valve assembly (6) is mounted on the valve cover (2) and includes a spring-loaded automatic air valve (6a) and a shut-off valve (6b) for isolating the automatic air valve (6a). The automatic air valve (6a) has a large orifice, a medium orifice, and a small orifice inside.

2. The composite quick-exhaust and quick-intake air valve according to claim 1, characterized in that: The valve body (1) and valve cover (2) are made of welded steel S235JRG2.

3. The composite quick-exhaust and quick-intake air valve according to claim 1, characterized in that: The inner and outer surfaces of the valve body (1) and valve cover (2) are provided with an epoxy coating.

4. The composite quick-exhaust and quick-intake air valve according to claim 1, characterized in that: The valve body of the automatic air valve (6a) is made of ductile iron EN-GJS-400-15.

5. A composite quick-exhaust and quick-intake air valve according to claim 1, characterized in that: The shut-off valve (6b) is a butterfly valve.

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