Air inlet device of positive pressure type explosion-proof power distribution cabinet

Abstract

The invention discloses an air inlet device of a positive pressure type explosion-proof power distribution cabinet, which is characterized in that a pressure reducing valve, a reversing electromagnetic valve and a positive pressure air supply speed regulating valve are all mounted on a cabinet body, and a speed reducing valve is positioned outside the cabinet body; the reversing solenoid valve and the positive pressure air supply speed regulating valve are positioned in the cabinet body; the manual ball valve is further mounted at an air inlet of the pressure reducing valve; the reversing electromagnetic valve is communicated with the pressure reducing valve through an air pipe assembly; and the reversing electromagnetic valve is communicated with the positive pressure air supply speed regulating valve through the air supply pipe. Through the application of the air inlet device of the positive pressure type explosion-proof power distribution cabinet, the pressure reducing valve, the reversing solenoid valve and the positive pressure air supply speed regulating valve are arranged on the cabinet body, so that the air inlet flow entering the cabinet body can be accurately regulated through the device, and the stability of the internal pressure of the positive pressure cabinet is ensured; and meanwhile, good sealing performance and durability are achieved.

Description

Technical Field

[0001] The present invention relates to the related technical fields such as an air intake device for a positive pressure cabinet, and in particular to an air intake device for a positive pressure explosion-proof distribution cabinet. Background Art

[0002] Positive pressure cabinets are widely used in explosion-proof and dust-proof fields. They need to maintain internal pressure higher than 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 the positive pressure cabinet. Summary of the invention

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

[0004] Pressure reducing valve, reversing solenoid valve, positive pressure air supply speed regulating 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 speed reducing valve is located outside the cabinet, and 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 is connected to the pressure reducing valve through an air pipe assembly;

[0008] The reversing solenoid valve is communicated with the positive pressure air supply speed regulating valve through the air supply air pipe.

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

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

[0011] In the above-mentioned air intake device of a positive pressure explosion-proof distribution cabinet, 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 joint and a fifth air pipe joint.

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

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

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

[0015] The above-mentioned air intake device of the 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 air intake device of a positive pressure explosion-proof distribution cabinet, the fourth air pipe joint is arranged in an "L" shape.

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

[0018] Compared with the prior art, the above technical solution has the following positive effects:

[0019] Through the application of the present invention, an air intake device for a positive pressure explosion-proof distribution cabinet is provided. By arranging a pressure reducing valve, a reversing solenoid valve and a positive pressure air supply speed regulating valve on the cabinet body, the air intake flow entering the cabinet body can be accurately adjusted through the device to ensure the internal pressure of the positive pressure cabinet is stable, while having good sealing and durability. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 The present invention is a top view of an air intake device of a positive pressure explosion-proof power distribution cabinet.

[0022] Figure 3 The present invention is a side view of an air intake device of a positive pressure explosion-proof power distribution cabinet.

[0023] 1. Pressure reducing valve; 2. Reversing solenoid valve; 3. Positive pressure air supply speed regulating valve; 4. Adjusting knob; 5. Cabinet; 6. Manual ball valve; 7. Air supply pipe; 8. First threaded joint; 9. Second threaded joint; 10. Third threaded joint; 11. First air pipe joint; 12. Second air pipe joint; 13. Fourth air pipe joint; 14. Fifth air pipe joint; 15. First muffler; 16. Second muffler; 17. Shell sealing gasket; 18. Gasket; 19. Sealing ring. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations, but they are not intended to limit the present invention.

[0025] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0026] like Figures 1 to 3 As shown, an air intake device of a positive pressure explosion-proof distribution cabinet of 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 air pipe 7, and a manual ball valve 6.

[0027] The pressure reducing valve 1, the reversing solenoid valve 2 and the positive pressure air supply speed regulating valve 3 are all installed in the cabinet 5, and the speed reducing valve 1 is located outside the cabinet 5, and the reversing solenoid valve 2 and the positive pressure air supply speed regulating valve 3 are located inside the cabinet 5; a manual ball valve 6 is also installed at the air inlet of the pressure reducing valve 1; the reversing solenoid valve 2 is connected to the pressure reducing valve 1 through an air pipe assembly; the reversing solenoid valve 2 is connected to the positive pressure air supply speed regulating valve 3 through an air supply air pipe 7.

[0028] In actual use, the air inlet of the pressure reducing valve 1 is connected to the gas source, and then the pressure reducing valve 1 reduces the air inlet pressure to a certain required air outlet pressure, and then the decompressed gas enters the reversing solenoid valve 2, which is used to control positive pressure purge and pressure compensation, and the gas finally enters the positive pressure air supply speed regulating valve 3, which is used to adjust the flow rate of the gas, so that the pressure finally entering the cabinet 5 is always maintained within the set value range. In addition, a manual ball valve 6 is installed at the air inlet of the pressure reducing valve 1, and the flow rate of the gas entering the pressure reducing valve 1 can be adjusted through the manual ball valve 6.

[0029] The present invention also has the following implementation modes based on the above:

[0030] Further, an air intake device for a positive pressure explosion-proof distribution cabinet is provided, wherein the manual ball valve 6 is connected to the air intake port of the pressure reducing valve 1 through a first threaded joint 8. Specifically, the manual ball valve 6 and the pressure reducing valve 1 are installed through the first threaded joint 8, and installation and disassembly are simple and quick.

[0031] Further, an air intake device for a positive pressure explosion-proof power distribution cabinet, wherein the air pipe assembly includes: a second threaded joint 9, a third threaded joint 10, a first air pipe joint 11, and a second air pipe joint 12; the second threaded joint 9 is installed on the reversing solenoid valve 2, the third threaded joint 10 is installed on the second threaded joint 9, and the third threaded joint 10 is sequentially installed on the pressure reducing valve 1 through the first air pipe joint 11 and the second air pipe joint 12. Specifically, the pressure reducing valve 1 and the reversing solenoid valve 2 are connected through multiple threaded joints and air pipe joints, and the relative position between the two is not restricted.

[0032] Further, an air intake device for a positive pressure explosion-proof power distribution cabinet is provided, wherein both ends of the air supply pipe 7 are respectively installed on the reversing solenoid valve 2 and the positive pressure air supply speed regulating valve 3 through the fourth air pipe joint 13 and the fifth air pipe joint 14. Specifically, the air supply pipe 7 is installed on the reversing solenoid valve 2 and the positive pressure air supply speed regulating valve 3 through two air pipe joints, so that the installation is more compact and not easy to fall off.

[0033] Furthermore, an air intake device for a positive pressure explosion-proof power distribution cabinet further includes: a first muffler 15; the first muffler 15 is installed on the reversing solenoid valve 2. Specifically, the first muffler 15 eliminates the noise generated when the reversing solenoid valve 2 is working.

[0034] Furthermore, an air intake device for a positive pressure explosion-proof power distribution cabinet further includes: a second muffler 16; the second muffler 16 is installed on the positive pressure air supply speed regulating valve 3. Specifically, the noise of the positive pressure air supply speed regulating valve 3 is eliminated by the second muffler 16.

[0035] Furthermore, an air intake device for a positive pressure explosion-proof distribution cabinet further includes: a housing seal 17; the housing seal 17 is installed between the pressure reducing valve 1 and the cabinet 5. Specifically, the housing seal 17 ensures the sealing of the pressure reducing valve 1 and the cabinet 5.

[0036] 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 5. Specifically, the gasket 18 increases the installation tightness between the reversing solenoid valve 2 and the cabinet 5.

[0037] Furthermore, an air intake device for a positive pressure explosion-proof power distribution cabinet is provided, wherein the fourth air pipe joint 13 is arranged in an "L" shape. Specifically, the direction of the gas is changed by the fourth air pipe 13 arranged in an "L" shape, so that the reversing solenoid valve 2 and the positive pressure air supply speed regulating valve 3 can be connected.

[0038] Further, an air intake device for a positive pressure explosion-proof distribution cabinet is provided, wherein the adjusting knob 4 of the positive pressure air supply speed regulating valve 3 extends out of the cabinet body 5. Specifically, the positive pressure air supply speed regulating valve 3 can be adjusted by the adjusting knob 4 outside the cabinet body 5.

[0039] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in 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 regulating 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 speed reducing valve is located outside the cabinet, and 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 is connected to the pressure reducing valve through an air pipe assembly; The reversing solenoid valve is communicated with the positive pressure air supply speed regulating valve through the air supply air pipe.

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

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

4. The air intake device of a positive pressure explosion-proof distribution cabinet according to claim 1 is 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 regulating valve through a fourth air pipe joint and a fifth air pipe joint.

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

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

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

8. The air intake device of 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 of a positive pressure explosion-proof distribution cabinet according to claim 4, characterized in that: The fourth air pipe joint is arranged in an "L" shape.

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

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