An exhaust valve with buffering function

Abstract

The present invention provides an exhaust valve with a buffering effect, comprising an exhaust valve housing and a float chamber, an exhaust valve is arranged on the top of the exhaust valve housing, gas-liquid two-phase is arranged in the exhaust valve housing, a float is arranged inside the float chamber, and the float chamber includes a PTFE material layer, which can allow gas to pass through but liquid cannot pass through; the float chamber is connected from top to bottom, the upper end is fixedly connected to the inner wall of the top of the exhaust valve housing, and the lower part extends below the liquid surface; the float floats on the liquid surface, the upper part of the float is connected to the exhaust valve through a steel wire, and the rise and fall of the float can be controlled by the height change of the liquid surface, and the rise and fall of the float can control the opening and closing of the exhaust valve, and the gas in the exhaust pipeline can enter the float chamber and finally be discharged from the exhaust valve. The present invention can prevent the gas-water mixture in the water supply pipeline from causing damage to the float and the exhaust valve, can reduce the maintenance cost, and increase the service life of the exhaust valve, and has a reasonable design, a simple structure, low cost, and strong practicality.

Description

Technical Field

[0001] The invention belongs to the technical field of exhaust valves, and in particular relates to an exhaust valve with a buffering effect. Background Art

[0002] During the operation of the water supply pipeline, the gas in the pipeline will accumulate at the raised part of the pipeline, forming air resistance. When the water flow in the pipeline fluctuates, the air bag formed at the raised part is constantly compressed and expanded. The pressure generated by the compressed gas is relatively large, which can easily cause the water supply pipeline to burst. Therefore, it is generally required to set an exhaust valve at the highest point of the water supply pipeline to release the gas accumulated in the water supply pipeline. The float is an important component for adjusting the exhaust and sealing of the exhaust valve. When the pump is turned on and off, due to the effect of water hammer, the float inside the exhaust valve on the water supply pipeline is easily impacted by the water-gas mixture, resulting in the exhaust valve float and the valve body violently colliding, causing the float to rupture and deform, and then the exhaust valve loses its sealing effect, which not only reduces the service life of the exhaust valve, but also affects the operation safety of the pipeline and increases the maintenance cost; in addition, the leakage problem caused by the rupture of the exhaust valve float will also cause a large amount of water resources to be wasted. Therefore, it is very necessary to design an exhaust valve with a buffering effect. Summary of the invention

[0003] The purpose of the present invention is to provide an exhaust valve with a buffering effect in view of the deficiencies in the prior art.

[0004] The present invention adopts the following technical solutions:

[0005] The utility model discloses an exhaust valve with a buffering effect, which is installed at a high point of a water supply pipeline. The water supply pipeline is connected to the exhaust valve through the exhaust pipeline. The exhaust valve comprises an exhaust valve housing and a float chamber. The float chamber is arranged inside the exhaust valve housing. An exhaust valve is arranged on the top of the exhaust valve housing. Gas and liquid are arranged in the exhaust valve housing. A float is arranged inside the float chamber. The float chamber allows gas to pass through, but liquid cannot pass through. The float chamber is connected from top to bottom. The upper end is fixedly connected to the inner wall at the top of the exhaust valve housing, and the lower part extends under the liquid surface. The float floats on the liquid surface. The upper part of the float is connected to the exhaust valve through a steel wire. The rise and fall of the float can be controlled by the height change of the liquid surface. The rise and fall of the float can control the opening and closing of the exhaust valve. The gas in the exhaust pipeline can enter the float chamber and finally be discharged from the exhaust valve.

[0006] Furthermore, the float chamber is cylindrical, and the side wall of the float chamber is divided into three layers, the inner and outer layers are metal layers, a PTFE material layer is fixed between the two metal layers, and a plurality of drill holes are arranged on the two metal layers, and the diameter of the drill holes is 10 mm.

[0007] Furthermore, the float chamber is surrounded by a buffer plate, which is divided into three layers, the inner and outer layers are metal sheets, a PTFE material layer is fixed between the two metal sheets, and a plurality of holes are arranged on the two metal sheets, and the hole diameter of the holes is 10 mm.

[0008] Furthermore, an exhaust port is provided on the top of the exhaust valve housing, and the exhaust valve can cover the exhaust port. One side of the exhaust valve is hinged to the top of the exhaust valve housing, and the exhaust valve can rotate around the hinge axis inside the exhaust valve housing; a float is connected to the lower surface of the exhaust valve, and when the liquid level drops, the float drops and drives the exhaust valve to rotate downward and open; when the liquid level rises, the float rises and pushes the exhaust valve to rotate upward and close.

[0009] Furthermore, the upper edge of the exhaust pipe extending into the exhaust valve housing is 20-30 mm higher than the lower edge of the float chamber.

[0010] Furthermore, the exhaust pipe portion extending into the exhaust valve housing is provided with a plurality of drilled holes with a hole diameter of 10 mm, and the direction of the openings is facing away from the float chamber.

[0011] Furthermore, a valve is provided on the exhaust pipe, and the exhaust valve housing, the valve and the water supply pipe are all connected by flanges.

[0012] Furthermore, the exhaust valve housing is cylindrical.

[0013] Beneficial effects of the present invention:

[0014] The present invention is provided with a float chamber with a buffering and protective function inside the exhaust valve. The side wall of the float chamber includes a PTFE membrane, the gap of which is very small, and can allow gas molecules to pass through, while liquids and water droplets or other multi-molecular polymers cannot pass through, so as to achieve the purpose of gas-liquid separation, avoid the float being directly impacted by the liquid, and place the float in the float chamber to be protected. The gas-water mixture in the water supply pipe will not cause damage to the float and the exhaust valve, thereby reducing the maintenance cost and increasing the service life of the exhaust valve. The present invention is reasonable in design, simple in structure, low in cost and strong in practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0017] The numbers in the figure are: 1. Water supply pipe; 2. Exhaust pipe; 3. Exhaust valve housing; 4. Float chamber; 5. Valve; 6. Float; 7. Exhaust valve; 8. Steel wire. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1-2 As shown, an exhaust valve with a buffering effect is installed at a high point of a water supply pipe 1. The water supply pipe 1 is connected to the exhaust valve through an exhaust pipe 2. The exhaust valve includes an exhaust valve housing 3 and a float chamber 4. The float chamber 4 is arranged inside the exhaust valve housing 3. An exhaust valve 7 is arranged on the top of the exhaust valve housing 3. There are liquid and gas in the exhaust valve housing 3. A float 6 is arranged inside the float chamber 4. The float chamber 4 has a buffering and protective effect, which allows gas to pass through while liquid cannot pass through. The float chamber 4 can prevent water vapor from directly impacting the float 6, thereby protecting the float 6. The float chamber 4 is connected from top to bottom, the upper end is fixedly connected to the inner wall of the top of the exhaust valve housing 3, and the lower part extends below the liquid surface. The float 6 floats on the liquid surface, and the upper part of the float 6 is connected to the exhaust valve 7 through a steel wire 8. The rise and fall of the float 6 can be controlled by the change of the height of the liquid level, and the rise and fall of the float 6 can control the opening and closing of the exhaust valve 7. The gas in the exhaust pipe 2 can enter the float chamber 4 and finally be discharged from the exhaust valve 7; the exhaust pipe 2 extends into the exhaust valve housing 3, and the upper edge of the exhaust pipe 2 is located below the liquid level; in this embodiment, the exhaust valve housing 3 is provided with an exhaust port at the top, and the exhaust valve 7 can cover the exhaust port. One side of the exhaust valve 7 is hinged with the top of the exhaust valve housing 3, and the exhaust valve 7 can rotate around the hinge axis inside the exhaust valve housing 3; the lower surface of the exhaust valve 7 is connected to the float 6. When the liquid level drops, the float 6 drops, and drives the exhaust valve 7 to rotate downward and open through the steel wire 8; when the liquid level rises, the float 6 rises, and pushes the exhaust valve 7 to rotate upward and close through the steel wire 8. In addition, in order to improve the sealing of the exhaust valve, rubber patches can be provided on the edges around the exhaust valve 7. When the exhaust port is in a closed state, the connection between the exhaust valve 7 and the exhaust port is tighter, thereby improving the air tightness of the device.

[0020] In this embodiment, the float chamber 4 is cylindrical, and the side wall of the float chamber 4 is divided into three layers, the inner and outer layers are metal layers, a PTFE material layer is fixed between the two metal layers, and a plurality of holes are provided on the two metal layers, and the hole diameter is 10 mm. In other embodiments of the present invention, the float chamber 4 is surrounded by a buffer plate, and the buffer plate is divided into three layers, the inner and outer layers are metal sheets, a PTFE material layer is fixed between the two metal sheets, and a plurality of holes are provided on the two metal sheets, and the hole diameter is 10 mm.

[0021] It should be noted that PTFE material is a special material made of polytetrafluoroethylene through a special process and has many micropores. The diameter of each micropore (0.1μm-0.5μm) is hundreds of times smaller than the diameter of a general water droplet (20μm-100μm), and tens of thousands of times larger than the diameter of gas molecules such as water vapor (0.0003μm-0.0004μm). Therefore, PTFE material allows gas to pass through, but water droplets cannot pass through, which can achieve the effect of gas-liquid separation and protect the exhaust valve.

[0022] In this embodiment, the upper edge of the exhaust pipe 2 extending into the exhaust valve housing 3 is higher than the lower edge of the float chamber 4, preferably by 20-30 mm, to further avoid the impact of high-pressure water vapor in the water supply pipe 1 on the float 6; the part of the exhaust pipe 2 extending into the exhaust valve housing 3 is provided with a plurality of drill holes with a hole diameter of 10 mm; it should be noted that, in the exhaust pipe 2 extending into the exhaust valve housing 3, only the side away from the float chamber 4 is provided with a drill hole.

[0023] In addition, in this embodiment, a valve 5 is also provided on the exhaust pipe 2, and the valve 5 is used to control the connection or disconnection between the water supply pipe 1 and the exhaust valve housing 3. The exhaust valve housing 3, the valve 5 and the water supply pipe 1 are all connected by flanges; the exhaust valve housing 3 is cylindrical.

[0024] Application process of the present invention: the device is installed at the high point of the water supply pipeline 1 through the exhaust pipeline 2, and a valve 5 is arranged on the exhaust pipeline 2. When the valve 5 is opened, the gas in the water supply pipeline 1 continuously gathers into the exhaust valve housing 3 under the action of buoyancy (the exhaust valve 7 is tightly closed at this time). As the gas continues to increase, the gas pressure in the exhaust valve housing 3 increases, and the liquid in the exhaust valve housing 3 is discharged into the water supply pipeline 1. When the liquid water level in the exhaust valve housing 3 is low, the float 6 drops, and pulls the exhaust valve 7 downward through the steel wire 8 to rotate, and the exhaust valve is opened to achieve exhaust; after exhaust, the air pressure in the exhaust valve housing 3 drops, and as the water vapor in the water supply pipeline 1 enters, the liquid level in the exhaust valve housing 3 rises, and then the float 6 rises, and pushes the exhaust valve 7 upward through the steel wire 8 to rotate, the exhaust valve is closed, and the exhaust is stopped, and the exhaust valve exhaust function is achieved by repeating the cycle; when water vapor rushes into the exhaust valve housing 3, due to the protection of the PTFE material in the float chamber 4, the float 6 and the exhaust valve 7 will not be impacted by the liquid, so they are protected, and the life of the exhaust valve is prolonged. The device has reasonable design, simple structure, convenient operation, strong practicability and is suitable for promotion.

[0025] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. An exhaust valve with a buffering function, installed at a high point of a water supply pipeline (1), the water supply pipeline (1) and the exhaust valve are connected through an exhaust pipeline (2), characterized in that: The invention comprises an exhaust valve housing (3) and a float chamber (4), wherein the float chamber (4) is arranged inside the exhaust valve housing (3), an exhaust valve (7) is arranged on the top of the exhaust valve housing (3), gas and liquid are arranged inside the exhaust valve housing (3), a float (6) is arranged inside the float chamber (4), the float chamber (4) allows gas to pass through but liquid cannot pass through, the float chamber (4) is connected from top to bottom, the upper end is fixedly connected to the inner wall of the top of the exhaust valve housing (3), and the lower part extends below the liquid surface, the float (6) floats on the liquid surface, and the upper part of the float (6) is connected to the inner wall of the top of the exhaust valve housing (3). The exhaust valve (7) is connected to the exhaust valve (7) through a steel wire (8), and the rise and fall of the float (6) can be controlled by the change of the height of the liquid level. The rise and fall of the float (6) can control the opening and closing of the exhaust valve (7), and the gas in the exhaust pipe (2) can enter the float chamber (4) and finally be discharged from the exhaust valve (7); the upper edge of the exhaust pipe (2) extending into the exhaust valve housing (3) is higher than the lower edge of the float chamber (4); the part of the exhaust pipe (2) extending into the exhaust valve housing (3) is provided with a plurality of drill holes, and the direction of the drill holes is opposite to the float chamber (4); The side wall of the float chamber (4) is divided into three layers, the inner and outer layers are metal layers, a PTFE material layer is fixed between the two metal layers, and a plurality of drill holes are arranged on the two metal layers.

2. The exhaust valve with buffering function according to claim 1, characterized in that: The float chamber (4) is cylindrical, and the bore diameter is 10 mm.

3. The exhaust valve with buffering function according to claim 1, characterized in that: The float chamber (4) is surrounded by a buffer plate, and the borehole diameter is 10 mm.

4. The exhaust valve with buffering function according to claim 1, characterized in that: The exhaust valve housing (3) is provided with an exhaust port at the top thereof, and the exhaust valve (7) can cover the exhaust port. One side of the exhaust valve (7) is hinged to the top of the exhaust valve housing (3), and the exhaust valve (7) can rotate around a hinge shaft inside the exhaust valve housing (3); the lower surface of the exhaust valve (7) is connected to a float (6); when the liquid level drops, the float (6) drops and drives the exhaust valve (7) to rotate downward and open; when the liquid level rises, the float (6) rises and drives the exhaust valve (7) to rotate upward and close.

5. The exhaust valve with buffering function according to claim 1, characterized in that: The upper edge of the exhaust pipe (2) extending into the exhaust valve housing (3) is 20-30 mm higher than the lower edge of the float chamber (4).

6. The exhaust valve with buffering function according to claim 1, characterized in that: The borehole diameter is 10 mm.

7. The exhaust valve with buffering function according to claim 1, characterized in that: The exhaust pipe (2) is provided with a valve (5), and the exhaust valve housing (3), the valve (5) and the water supply pipe (1) are all connected by flanges.

8. The exhaust valve with buffering function according to claim 1, characterized in that: The exhaust valve housing (3) is cylindrical.

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