Double-blow-off valve device capable of balancing pressure intensity

Abstract

The utility model discloses a double blow-off valve device capable of balancing pressure intensity, and relates to the technical field of double blow-off valves. Comprising a main valve, a first blow-off valve, a second blow-off valve, a fourth pipeline, a second valve, a first blow-off pipeline and a second blow-off pipeline, the first pipeline and the second pipeline are connected to the two sides of the main valve respectively according to the flowing direction of gas in the pipelines, the first blow-off pipeline is connected to the first pipeline, and the first blow-off valve is installed on the first blow-off pipeline; the second pipeline is connected with a second diffusion pipeline, a second diffusion valve is installed on the second diffusion pipeline, a fourth pipeline is connected between the first diffusion pipeline and the second diffusion pipeline, and a second valve is connected to the fourth pipeline. When the main valve is opened and closed, the pressure balance of the two sides of the main valve can be guaranteed, the main valve is opened and closed easily, the main valve is not prone to being damaged by brute force, and the service life of the main valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of double-release valves, in particular to a double-release valve device capable of balancing pressure. Background Art

[0002] The relief valve is a safety warning device for pipeline transportation of flammable and explosive gases. When the pressure at the control point exceeds the set value (bubble burst pressure) due to some temporary reasons, the valve will discharge a certain amount of gas. With the continuous advancement of urbanization, the application of gas is becoming more and more extensive, and the construction of gas pipelines and their equipment also need to continuously adapt to various requirements. The utility model patent with application number 200920222913.2 discloses a double relief valve device, which includes a main valve and a double relief structure; the double relief structure includes a set of relief pipelines, and the relief pipelines are arranged in parallel and symmetrically on the left and right sides of the main valve. In this patent, when there is a pressure difference between the pipelines on both sides, the main valve has a large opening resistance, is difficult to open and close, and brute force operation is easy to damage the valve. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a double-release valve device capable of balancing pressure, which can ensure the pressure balance on both sides of the main valve when opening and closing, and can easily open and close the main valve, and is not easily damaged by brute force, thereby extending its service life.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A double relief valve device capable of balancing pressure comprises a main valve, a first relief valve, a second relief valve, a fourth pipeline, a second valve, a first relief pipeline, and a second relief pipeline. According to the gas flow direction in the pipeline, the first pipeline and the second pipeline are respectively connected on both sides of the main valve, the first pipeline is connected to the first relief pipeline, the first relief valve is installed on the first relief pipeline, the second pipeline is connected to the second relief pipeline, the second relief valve is installed on the second relief pipeline, the fourth pipeline is connected between the first relief pipeline and the second relief pipeline, and the second valve is connected to the fourth pipeline.

[0006] Preferably, the first relief valve is installed on the top of the first relief pipe, the second relief valve is installed on the top of the second relief pipe, and the fourth pipe is connected to the middle of the first relief pipe and the second relief pipe.

[0007] Preferably, the first relief valve is installed in the middle of the first relief pipe, the second relief valve is installed in the middle of the second relief pipe, and the fourth pipe is connected to the upper part of the first relief pipe and the second relief pipe.

[0008] Preferably, a first valve is installed at the top of the first relief pipe, and a third valve is installed at the top of the second relief pipe.

[0009] The beneficial effects of adopting the above technical solution are:

[0010] 1. The utility model connects a fourth pipeline between the first relief pipeline and the second relief pipeline, and installs a second valve on the fourth pipeline. If the second valve is installed before the two relief valves, when opening and closing the main valve, the second valve is opened to connect the first relief pipeline and the second relief pipeline, and the pressure in the two pipelines is balanced, that is, the pressure on both sides of the main valve is balanced, which makes it easy to open and close the main valve, thereby preventing the main valve from being damaged by brute force.

[0011] 2. When the fourth pipe is installed behind the two relief valves, a first valve and a third valve are installed at the top of the two relief pipes respectively. When opening and closing the main valve, the two relief valves are opened, the first valve and the third valve are closed, and the second valve is opened. The pressure on both sides of the main valve is balanced, which is convenient for opening and closing the main valve and avoiding damage to the main valve by brute force. It is important that the entire device can be modified on the basis of the existing double relief valve, which is equivalent to adding a pressure balancing structure on the existing double relief valve. This structure consists of the first relief pipe, the second relief pipe, the fourth pipe, the second valve, and the first valve and the third valve. The entire modification is very convenient and practical, and has great promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the first embodiment;

[0013] Figure 2 is a schematic structural diagram of a second embodiment;

[0014] In the figure: 1. double relief valve; 101. main valve; 102. first relief valve; 103. second relief valve; 104. first pipeline; 105. second pipeline; 2. first valve; 3. second valve; 4. third valve; 8. first three-way valve; 9. second three-way valve; 10. fourth pipeline; 11. first relief pipeline; 12. second relief pipeline. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Example

[0016] like Figure 1As shown, the double relief valve device includes a main valve 101, a first relief valve 102, a second relief valve 103, a fourth pipeline 10, a second valve 3, a first relief pipeline 11, and a second relief pipeline 12. According to the gas flow direction in the pipeline, the first pipeline 104 and the second pipeline 105 are connected to the two sides of the main valve 101 respectively. The first pipeline 104 is connected to the first relief pipeline 11, and the second pipeline 105 is connected to the second relief pipeline 12. The first relief valve 102 is installed on the top of the first relief pipeline 11, and the second relief valve 103 is installed on the top of the second relief pipeline 12. The left and right ends of the fourth pipeline 10 are connected to the middle of the first relief pipeline 11 and the second relief pipeline 12 through the second three-way 9 and the first three-way 8 respectively. The second valve 3 is installed on the fourth pipeline 10. In normal use, the second valve 3 is closed, and the two relief valves are also closed. To open or close the main valve 101, you only need to open the second valve 3. The main valve 101 balances the pressure on both sides, and the main valve 101 can be easily opened or closed. If the pipeline pressure fluctuates, the two relief valves will automatically open and release to ensure safety, while the second valve 3 will not be affected and remain closed. Example

[0017] This embodiment is suitable for modification on the basis of the existing double relief valve, and can be completed without affecting the functions and use of the components of the double relief valve, and has great promotion significance.

[0018] Specific structure such as Figure 2 As shown, the double relief valve device includes a main valve 101, a first relief valve 102, a second relief valve 103, a fourth pipeline 10, a second valve 3, a first relief pipeline 11, a second relief pipeline 12, a first valve 2, and a third valve 4. According to the gas flow direction in the pipeline, the first pipeline 104 and the second pipeline 105 are connected to the two sides of the main valve 101 respectively. The first pipeline 104 is connected to the first relief pipeline 11, and the second pipeline 105 is connected to the second relief pipeline 12. The first relief valve 102 is installed on the first relief pipeline 11, and the second relief valve 103 is installed on the second relief pipeline 12. The left and right ends of the fourth pipeline 10 are connected to the first relief pipeline 11 and the second relief pipeline 12 through the second three-way 9 and the first three-way 8 respectively. The first valve 2 is installed on the top of the first relief pipeline 11, and the third valve 4 is installed on the top of the second relief valve 103. This embodiment is equivalent to adding a balanced pressure mechanism on the basis of the existing double relief valve, and the balanced pressure mechanism is composed of a first relief pipe 11, a second relief pipe 12, a fourth pipe 10, a second valve 3, a first valve 2, and a third valve 4.

[0019] In normal use, the first relief valve 102 and the second relief valve 103 are closed, the second valve 3 is closed, and the first valve 2 and the third valve 4 are open. If the pipeline pressure fluctuates and reaches the opening pressure of the relief valve, the two relief valves will automatically open and release to ensure safety. If the main valve 101 is to be opened and closed, the first valve 2 and the third valve 4 must be closed, the second valve 3 must be opened, the first relief valve 102 and the second relief valve 103 must be opened, and the pressure on both sides of the main valve 101 must be balanced, so that the main valve 101 can be easily opened and closed.

[0020] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A double relief valve device that can balance pressure, It is characterized in that The invention comprises a main valve (101), a first relief valve (102), a second relief valve (103), a fourth pipeline (10), a second valve (3), a first relief pipeline (11), and a second relief pipeline (12). According to the flow direction of gas in the pipeline, the first pipeline (104) and the second pipeline (105) are respectively connected on both sides of the main valve (101); the first pipeline (104) is connected to the first relief pipeline (11); the first relief valve (102) is installed on the first relief pipeline (11); the second pipeline (105) is connected to the second relief pipeline (12); the second relief valve (103) is installed on the second relief pipeline (12); the fourth pipeline (10) is connected between the first relief pipeline (11) and the second relief pipeline (12); and the second valve (3) is connected to the fourth pipeline (10).

2. A double-release valve device capable of balancing pressure according to claim 1, It is characterized in that The first relief valve (102) is installed at the top of the first relief pipe (11), the second relief valve (103) is installed at the top of the second relief pipe (12), and the fourth pipe (10) is connected to the middle of the first relief pipe (11) and the second relief pipe (12).

3. A double-release valve device capable of balancing pressure according to claim 1, It is characterized in that The first relief valve (102) is installed in the middle of the first relief pipe (11), the second relief valve (103) is installed in the middle of the second relief pipe (12), and the fourth pipe (10) is connected to the upper parts of the first relief pipe (11) and the second relief pipe (12).

4. A double-release valve device capable of balancing pressure according to claim 3, It is characterized in that A first valve (2) is installed at the top of the first relief pipe (11), and a third valve (4) is installed at the top of the second relief pipe (12).

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