Air intake apparatus for positive-pressure explosion-proof power distribution cabinet

Abstract

An air intake apparatus for a positive-pressure explosion-proof power distribution cabinet, comprising a pressure reducing valve (1), a directional solenoid valve (2), and a positive-pressure air-replenishing speed control valve (3). The pressure reducing valve (1) is located outside a cabinet body (5), and the directional solenoid valve (2) and the positive-pressure air-replenishing speed control valve (3) are located inside the cabinet body (5). A manual ball valve (6) is further mounted at an air inlet of the pressure reducing valve (1). The directional solenoid valve (2) is in communication with the pressure reducing valve (1) by means of a tubing assembly. The directional solenoid valve (2) is in communication with the positive-pressure air-replenishing speed control valve (3) by means of air-replenishing tubing (7). By providing the pressure reducing valve (1), the directional solenoid valve (2), and the positive-pressure air-replenishing speed control valve (3), the present apparatus can accurately regulate the flow of intake air entering the cabinet body (5), thereby ensuring that the internal pressure of the positive-pressure cabinet is stable.

Description

An air intake device for a positive pressure explosion-proof distribution cabinet Technical Field

[0001] This invention relates to the technical field of positive pressure switchgear air intake devices and related fields, and particularly to an air intake device for a positive pressure explosion-proof switchgear. Background Technology

[0002] Positive pressure cabinets are widely used in explosion-proof and dust-proof fields. They need to maintain an internal pressure higher than the external environmental pressure to prevent harmful substances from entering. However, existing air intake devices have problems such as inaccurate adjustment, poor sealing, and unstable flow control, which affect the protective effect and equipment safety of positive pressure cabinets. Summary of the Invention

[0003] In view of this, in order to solve the above problems, the purpose of this invention is to provide an air intake device for a positive pressure explosion-proof distribution cabinet, comprising:

[0004] Pressure reducing valve, reversing solenoid valve, positive pressure air supply speed control valve, cabinet, air supply pipe, manual ball valve;

[0005] The pressure reducing valve, the reversing solenoid valve, and the positive pressure air supply speed regulating valve are all installed in the cabinet, and the deceleration valve is located outside the cabinet, while the reversing solenoid valve and the positive pressure air supply speed regulating valve are located inside the cabinet.

[0006] The manual ball valve is also installed at the air inlet of the pressure reducing valve;

[0007] The reversing solenoid valve and the pressure reducing valve are connected via a duct assembly.

[0008] The reversing solenoid valve and the positive pressure air supply speed control valve are connected through the air supply pipe.

[0009] In the above-mentioned positive pressure explosion-proof distribution cabinet air intake device, the manual ball valve is connected to the air intake of the pressure reducing valve through a first threaded joint.

[0010] The above-mentioned positive pressure explosion-proof distribution cabinet air intake device, wherein the air pipe assembly includes: a second threaded connector, a third threaded connector, a first air pipe connector, and a second air pipe connector; the second threaded connector is installed on the reversing solenoid valve, the third threaded connector is installed on the second threaded connector, and the third threaded connector is sequentially installed on the pressure reducing valve through the first air pipe connector and the second air pipe connector.

[0011] In the above-mentioned positive pressure explosion-proof distribution cabinet air intake device, the two ends of the air supply pipe are respectively installed on the reversing solenoid valve and the positive pressure air supply speed regulating valve through a fourth air pipe connector and a fifth air pipe connector.

[0012] The air intake device of the aforementioned positive pressure explosion-proof distribution cabinet further includes: a first silencer; the first silencer is installed on the reversing solenoid valve.

[0013] The air intake device of the aforementioned positive pressure explosion-proof distribution cabinet further includes: a second silencer; the second silencer is installed on the positive pressure air supply speed regulating valve.

[0014] The air intake device of the aforementioned positive pressure explosion-proof distribution cabinet further includes: a housing sealing gasket; the housing sealing gasket is installed between the pressure reducing valve and the cabinet body.

[0015] The air intake device of the aforementioned positive pressure explosion-proof distribution cabinet further includes: a gasket; the gasket is also installed between the reversing solenoid valve and the cabinet body.

[0016] In the above-mentioned positive pressure explosion-proof distribution cabinet air intake device, the fourth air pipe connector is arranged in an "L" shape.

[0017] In the above-mentioned positive pressure explosion-proof distribution cabinet air intake device, the adjusting knob of the positive pressure air replenishment speed regulating valve extends out of the cabinet body.

[0018] The positive effects of the above technical solution compared with the existing technology are:

[0019] By applying this invention, an air intake device for a positive pressure explosion-proof distribution cabinet is provided. By installing a pressure reducing valve, a reversing solenoid valve, and a positive pressure air supply speed regulating valve on the cabinet, the air intake flow rate entering the cabinet can be precisely adjusted through this device to ensure stable internal pressure of the positive pressure cabinet, while also possessing good sealing performance and durability. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the air intake device of a positive pressure explosion-proof distribution cabinet according to the present invention.

[0021] Figure 2 is a top view of the air intake device of a positive pressure explosion-proof distribution cabinet according to the present invention.

[0022] Figure 3 is a side view of the air intake device of a positive pressure explosion-proof distribution cabinet according to the present invention. 1. Pressure reducing valve; 2. Reversing solenoid valve; 3. Positive pressure air supply speed regulating valve; 4. Adjusting knob; 5. Cabinet body; 6. Manual ball valve; 7. Air supply pipe; 8. First threaded connector; 9. Second threaded connector; 10. Third threaded connector; 11. First air pipe connector; 12. Second air pipe connector; 13. Fourth air pipe connector; 14. Fifth air pipe connector; 15. First silencer; 16. Second silencer; 17. Housing sealing gasket; 18. Gasket; 19. Sealing ring. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the invention.

[0024] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0025] As shown in Figures 1 to 3, an air intake device for a positive pressure explosion-proof distribution cabinet according to a preferred embodiment is shown, which includes: a pressure reducing valve 1, a reversing solenoid valve 2, a positive pressure air supply speed regulating valve 3, a cabinet body 5, an air supply pipe 7, and a manual ball valve 6.

[0026] Pressure reducing valve 1, reversing solenoid valve 2, and positive pressure replenishing speed regulating valve 3 are all installed in cabinet 5, with pressure reducing valve 1 located outside cabinet 5 and reversing solenoid valve 2 and positive pressure replenishing speed regulating valve 3 located inside cabinet 5; a manual ball valve 6 is also installed at the air inlet of pressure reducing valve 1; reversing solenoid valve 2 is connected to pressure reducing valve 1 through an air pipe assembly; reversing solenoid valve 2 is connected to positive pressure replenishing speed regulating valve 3 through a replenishing air pipe 7.

[0027] In practical use, the inlet of pressure reducing valve 1 is connected to a gas source. Pressure reducing valve 1 then reduces the inlet pressure to a desired outlet pressure. The reduced gas then enters reversing solenoid valve 2, which controls positive pressure purging and pressure compensation. Finally, the gas enters positive pressure replenishment speed regulating valve 3, which adjusts the gas flow rate to ensure the final pressure entering cabinet 5 remains within the set range. A manual ball valve 6 is installed at the inlet of pressure reducing valve 1, allowing for adjustment of the gas flow rate entering pressure reducing valve 1.

[0028] In addition to the above, the present invention also has the following embodiments:

[0029] Furthermore, in a positive-pressure explosion-proof distribution cabinet, an air intake device is provided, wherein a manual ball valve 6 is connected to the air intake of a pressure reducing valve 1 via a first threaded connector 8. Specifically, the manual ball valve 6 and the pressure reducing valve 1 are installed via the first threaded connector 8, making installation and disassembly simple and quick.

[0030] Furthermore, an air intake device for a positive pressure explosion-proof distribution cabinet includes an air pipe assembly comprising: a second threaded connector 9, a third threaded connector 10, a first air pipe connector 11, and a second air pipe connector 12. The second threaded connector 9 is installed on a reversing solenoid valve 2, and the third threaded connector 10 is installed on the second threaded connector 9. The third threaded connector 10 is sequentially installed on a pressure reducing valve 1 via the first air pipe connector 11 and the second air pipe connector 12. Specifically, the pressure reducing valve 1 and the reversing solenoid valve 2 are connected via multiple threaded connectors and air pipe connectors, and the relative positions between them are unrestricted.

[0031] Furthermore, in a positive pressure explosion-proof distribution cabinet, the air intake device comprises an air supply pipe 7, the two ends of which are respectively installed on the reversing solenoid valve 2 and the positive pressure air supply speed control valve 3 via a fourth air pipe connector 13 and a fifth air pipe connector 14. Specifically, the air supply pipe 7 is installed on the reversing solenoid valve 2 and the positive pressure air supply speed control valve 3 via two air pipe connectors, making the installation tighter and less prone to falling off.

[0032] Furthermore, an air intake device for a positive pressure explosion-proof distribution cabinet further includes: a first silencer 15; the first silencer 15 is installed on the reversing solenoid valve 2. Specifically, the first silencer 15 eliminates the noise generated when the reversing solenoid valve 2 is in operation.

[0033] Furthermore, an air intake device for a positive pressure explosion-proof distribution cabinet further includes: a second silencer 16; the second silencer 16 is installed on the positive pressure air supply speed regulating valve 3. Specifically, the second silencer 16 eliminates the noise of the positive pressure air supply speed regulating valve 3.

[0034] Furthermore, an air intake device for a positive pressure explosion-proof distribution cabinet further includes: a housing sealing gasket 17; the housing sealing gasket 17 is installed between the pressure reducing valve 1 and the cabinet body 5. Specifically, the housing sealing gasket 17 ensures the sealing performance between the pressure reducing valve 1 and the cabinet body 5.

[0035] Furthermore, an air intake device for a positive pressure explosion-proof distribution cabinet further includes: a gasket 18; a gasket 18 is also installed between the reversing solenoid valve 2 and the cabinet body 5. Specifically, the gasket 18 increases the tightness of the installation between the reversing solenoid valve 2 and the cabinet body 5.

[0036] Furthermore, in a positive pressure explosion-proof distribution cabinet, the air intake device has an "L"-shaped fourth air pipe connector 13. Specifically, the "L"-shaped fourth air pipe 13 changes the direction of the gas, thereby enabling the reversing solenoid valve 2 and the positive pressure air supply speed regulating valve 3 to connect.

[0037] Furthermore, an air intake device for a positive pressure explosion-proof distribution cabinet includes an adjustment knob 4 of the positive pressure air supply speed control valve 3 extending out of the cabinet body 5. Specifically, this allows the positive pressure air supply speed control valve 3 to be adjusted via the adjustment knob 4 from outside the cabinet body 5.

[0038] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. An air intake device for a positive pressure explosion-proof distribution cabinet, characterized in that, include: Pressure reducing valve, reversing solenoid valve, positive pressure air supply speed control valve, cabinet, air supply pipe, manual ball valve; The pressure reducing valve, the reversing solenoid valve, and the positive pressure air supply speed regulating valve are all installed in the cabinet, and the deceleration valve is located outside the cabinet, while the reversing solenoid valve and the positive pressure air supply speed regulating valve are located inside the cabinet. The manual ball valve is also installed at the air inlet of the pressure reducing valve; The reversing solenoid valve and the pressure reducing valve are connected via a duct assembly. The reversing solenoid valve and the positive pressure air supply speed control valve are connected through the air supply pipe.

2. The air intake device for a positive pressure explosion-proof distribution cabinet according to claim 1, characterized in that, The manual ball valve is connected to the air inlet of the pressure reducing valve via a first threaded connector.

3. The air intake device for a positive pressure explosion-proof distribution cabinet according to claim 1, characterized in that, The air tube assembly includes: a second threaded connector, a third threaded connector, a first air tube connector, and a second air tube connector; the second threaded connector is installed on the reversing solenoid valve, the third threaded connector is installed on the second threaded connector, and the third threaded connector is sequentially installed on the pressure reducing valve through the first air tube connector and the second air tube connector.

4. The air intake device for a positive pressure explosion-proof distribution cabinet according to claim 1, characterized in that, The two ends of the air supply pipe are respectively installed on the reversing solenoid valve and the positive pressure air supply speed control valve through the fourth air pipe connector and the fifth air pipe connector.

5. The air intake device for a positive pressure explosion-proof distribution cabinet according to claim 1, characterized in that, Also includes: First silencer; the first silencer is installed on the reversing solenoid valve.

6. The air intake device for a positive pressure explosion-proof distribution cabinet according to claim 1, characterized in that, Also includes: The second silencer is installed on the positive pressure air supply speed control valve.

7. The air intake device for a positive pressure explosion-proof distribution cabinet according to claim 1, characterized in that, Also includes: Housing sealing gasket; the housing sealing gasket is installed between the pressure reducing valve and the cabinet.

8. The air intake device for a positive pressure explosion-proof distribution cabinet according to claim 1, characterized in that, Also includes: Gasket; the gasket is also installed between the reversing solenoid valve and the cabinet.

9. The air intake device for a positive pressure explosion-proof distribution cabinet according to claim 4, characterized in that, The fourth endotracheal connector is L-shaped.

10. The air intake device for a positive pressure explosion-proof distribution cabinet according to claim 1, characterized in that, The adjustment knob of the positive pressure air supply speed control valve extends out of the cabinet.

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