Air-cooled explosion-proof electric control cabinet

Abstract

The utility model belongs to the technical field of engineering, and particularly relates to an air-cooled explosion-proof electric control cabinet. The explosion-proof electric control cabinet comprises an explosion-proof box body, an air inlet pipe, a fixing frame, a pneumatic triple piece, an air inlet pneumatic control valve, an exhaust pneumatic pressure relief valve and an environment temperature sensor. Compressed air enters the pneumatic FRL after the pneumatic control valve is opened, the compressed air enters the air inlet pipe in the cabinet body after being purified, dried and subjected to pressure regulation through the pneumatic FRL, fresh cold air enters the explosion-proof cabinet through the air outlet in the air inlet pipe, and the cold and hot air naturally circulates in the cabinet to reduce the environment temperature in the cabinet. When the pressure in the cabinet body exceeds the pressure set by the exhaust pneumatic pressure relief valve, air in the cabinet body is exhausted through the exhaust pipeline on the pressure relief valve, and the purpose of stabilizing the pressure in the cabinet body is achieved in this way. By adopting the cooling mode, the service life of internal electrical elements can be prolonged by 20%.

Description

Technical Field

[0001] The utility model belongs to the field of engineering technology, and specifically relates to an air-cooled explosion-proof electric control cabinet. Background Art

[0002] There are three types of explosion-proof electric control cabinets on the market: flameproof, increased safety, and positive pressure. Since the electrical components in the explosion-proof electric control cabinet are densely packed and used continuously for a long time, the cabinet has good sealing but is not easy to dissipate heat, resulting in a high working environment temperature in the cabinet.

[0003] However, for electrical components, poor heat dissipation will affect the service life of the components, and thus seriously affect the smooth operation of the equipment. At present, the heat dissipation method of the explosion-proof electric control cabinet is to rely on the electrical components to be close to the electrical cabinet panel and dissipate heat naturally through the cabinet panel. This heat dissipation method is slow and the effect is not ideal.

[0004] Therefore, it is necessary to develop a new explosion-proof electric control cabinet to overcome the above problems. Summary of the invention

[0005] The technical problem and idea to be solved by the present invention are: to solve the technical problem of slow heat dissipation of electrical components in explosion-proof electric control cabinets, adopt a composite explosion-proof form combining flameproof type and positive pressure type explosion-proof form, and use circulating air cooling method to prevent the working performance of components inside the cabinet from being degraded or damaged due to excessively high ambient temperature.

[0006] An air-cooled explosion-proof electric control cabinet comprises an explosion-proof box body 1, an air inlet pipe 2, a fixing frame 3, a pneumatic triplet 4, an air inlet pneumatic control valve 5, an exhaust pneumatic pressure relief valve 6 and an ambient temperature sensor 7;

[0007] The explosion-proof box body 1 is a rectangular parallelepiped shell;

[0008] The air inlet pipe 2 is located above the inside of the side panel of the explosion-proof box body 1, and the pipe mouth of the air inlet pipe 2 extends from the other adjacent side panel; the fixing frame 3 is fixedly connected to the outer side wall of the explosion-proof box body 1 corresponding to the pipe mouth of the air inlet pipe 2, and the pneumatic triplet 4 is fixed on the fixing frame 3 to dry and clean the compressed air and filter it, and at the same time adjust the intake pressure; one end of the pneumatic triplet 4 is connected to the air inlet pipe 2, and the other end is connected to the intake pneumatic control valve 5, and the intake pneumatic control valve 5 controls the connection and disconnection of the compressed air; the exhaust pneumatic pressure relief valve 6 is located at the outer and lower side wall of the explosion-proof box body 1 opposite to the pipe mouth of the air inlet pipe 2, and controls the pressure inside the explosion-proof box; the ambient temperature sensor 7 is located on the side of the exhaust port in the explosion-proof box corresponding to the exhaust pneumatic pressure relief valve 6; the ambient temperature sensor 7 is connected to the intake pneumatic control valve 5 for communication, and controls the opening and closing of the intake pneumatic control valve 5;

[0009] Preferably, the air inlet pipe 2 is located on the inner side of the back plate of the explosion-proof box body 1 , and the pipe opening of the air inlet pipe 2 is located on the left side plate of the explosion-proof box body 1 .

[0010] Furthermore, the ambient temperature sensor 7 is mounted on the back plate of the explosion-proof box body 1 , and the exhaust pneumatic pressure relief valve 6 is located on the right side plate of the explosion-proof box body 1 .

[0011] Preferably, the gap between the explosion-proof box body 1 and the pipe opening of the air inlet pipe 2, and the gap between the explosion-proof box body 1 and the pipeline connected to the exhaust pneumatic pressure relief valve 6 are sealed with explosion-proof sealing putty.

[0012] Preferably, the explosion-proof box further comprises a cable connection port 8, which is located on the bottom plate of the explosion-proof box body 1 and is used for inserting cables for controlling the explosion-proof box components.

[0013] Furthermore, after the cable connection port 8 is inserted, the gap between the cable and the connection port is sealed with explosion-proof sealing putty.

[0014] Preferably, the air intake pneumatic control valve 5 and the exhaust pneumatic pressure relief valve 6 are intrinsically safe solenoid valves.

[0015] Furthermore, the ambient temperature sensor 7 sets the maximum and minimum temperature values, and controls the air intake pneumatic control valve 5 and the exhaust pneumatic pressure relief valve 6 to control the on and off of compressed air.

[0016] Preferably, the air intake pneumatic control valve 5 and the exhaust pneumatic pressure relief valve 6 are manual valves, and the temperature sensor 7 controls the alarm signal to facilitate manual opening and closing of the manual valves.

[0017] Preferably, the fixing bracket 3 is welded to the outside of the explosion-proof box body 1 .

[0018] Beneficial effects achieved by the present invention:

[0019] The utility model allows compressed air to enter the pneumatic triplex after the pneumatic control valve is opened. The pneumatic triplex purifies, dries and regulates the compressed air before entering the air intake pipe in the cabinet. Fresh cold air enters the explosion-proof cabinet through the air outlet in the air intake pipe. The hot and cold air circulates naturally in the cabinet to reduce the ambient temperature in the cabinet. When the pressure in the cabinet exceeds the pressure set by the exhaust pneumatic pressure relief valve, the air in the cabinet is discharged through the exhaust pipeline on the pressure relief valve. In this way, the purpose of stabilizing the pressure in the cabinet is achieved. By adopting this cooling method, the service life of the internal electrical components can be increased by 20%. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail in conjunction with the following examples. It should be noted that the present invention is not limited to the following examples.

[0022] Example 1

[0023] An air-cooled explosion-proof electric control cabinet, such as Figure 1 As shown, it includes an explosion-proof box body 1, an air inlet pipe 2, a fixing frame 3, a pneumatic triplex 4, an air inlet pneumatic control valve 5, an exhaust pneumatic pressure relief valve 6, an ambient temperature sensor 7 and a cable connection port 8;

[0024] The explosion-proof box body 1 is a rectangular parallelepiped shell;

[0025] The air inlet pipe 2 is located on the inner side of the back plate of the explosion-proof box body 1, and the outlet of the air inlet pipe 2 is located on the left side plate of the explosion-proof box body 1 and extends out; the fixing frame 3 is fixedly connected to the outer side wall of the explosion-proof box body 1 corresponding to the outlet of the air inlet pipe 2, and the pneumatic triplet 4 is fixed on the fixing frame 3 to dry and clean the compressed air and adjust the intake pressure at the same time; one end of the pneumatic triplet 4 is connected to the air inlet pipe 2, and the other end is connected to the air inlet pneumatic control valve 5, and the air inlet pneumatic control valve 5 controls the connection and disconnection of the compressed air; the exhaust The pneumatic pressure relief valve 6 is located at the lower outer side wall of the explosion-proof box body 1 opposite to the pipe opening of the air inlet pipe 2, and controls the pressure inside the explosion-proof box; the ambient temperature sensor 7 is installed on the back plate of the explosion-proof box body 1, and the exhaust pneumatic pressure relief valve 6 is located on the right side plate of the explosion-proof box body 1; the ambient temperature sensor 7 is communicated with the air intake pneumatic control valve 5 to control the opening and closing of the air intake pneumatic control valve 5; the cable wiring port 8 is located on the bottom plate of the explosion-proof box body 1, and is used to insert the cable that controls the explosion-proof box components.

[0026] The gap between the explosion-proof box body 1 and the air inlet pipe 2, and the gap between the explosion-proof box body 1 and the pipeline connected to the exhaust pneumatic pressure relief valve 6 are sealed with explosion-proof sealing putty; after the cable wiring port 8 is inserted, the gap between the cable and the wiring port is sealed with explosion-proof sealing putty.

[0027] The air intake pneumatic control valve 5 and the exhaust pneumatic pressure relief valve 6 are intrinsically safe solenoid valves; the ambient temperature sensor 7 sets the maximum and minimum temperature values ​​to control the air intake pneumatic control valve 5 and the exhaust pneumatic pressure relief valve 6 to control the on and off of compressed air.

[0028] The working principle of this embodiment is as follows:

[0029] The temperature sensor senses the temperature change inside the cabinet, and controls the air intake pneumatic control valve by setting the highest and lowest temperature values ​​to control the compressed air on and off, thereby controlling the ambient temperature inside the explosion-proof control cabinet. After the pneumatic control valve is opened, the compressed air enters the pneumatic triplex, which purifies, dries and regulates the compressed air before entering the air intake pipe inside the cabinet. Fresh cold air enters the explosion-proof cabinet through the air outlet in the air intake pipe, and the hot and cold air circulates naturally in the cabinet to reduce the ambient temperature inside the cabinet. When the pressure inside the cabinet exceeds the pressure set by the exhaust pneumatic pressure relief valve, the air inside the cabinet is discharged through the exhaust pipe on the pressure relief valve, and the purpose of stabilizing the pressure inside the cabinet is achieved in this way. Using this cooling method, the service life of its internal electrical components can be increased by 20%.

Claims

1. An air-cooled explosion-proof electric control cabinet, characterized in that: It comprises an explosion-proof box body (1), an air inlet pipe (2), a fixing frame (3), a pneumatic triplet (4), an air inlet pneumatic control valve (5), an exhaust pneumatic pressure relief valve (6) and an ambient temperature sensor (7); The explosion-proof box body (1) is a rectangular parallelepiped shell; The air inlet pipe (2) is located above the side panel of the explosion-proof box body (1), and the pipe opening of the air inlet pipe (2) extends out from another adjacent side panel; the fixing frame (3) is fixedly connected to the outer wall of the explosion-proof box body (1) corresponding to the pipe opening of the air inlet pipe (2); the pneumatic triplet (4) is fixed on the fixing frame (3) to dry and clean the compressed air and adjust the intake pressure at the same time; one end of the pneumatic triplet (4) is connected to the air inlet pipe (2), and the other end is connected to the intake pneumatic control valve ( 5), the air intake pneumatic control valve (5) controls the connection and disconnection of compressed air; the exhaust pneumatic pressure relief valve (6) is located at the lower side of the side wall of the explosion-proof box body (1) opposite to the pipe opening of the air intake pipe (2), and controls the pressure in the explosion-proof box; the ambient temperature sensor (7) is located on the side of the exhaust port in the explosion-proof box corresponding to the exhaust pneumatic pressure relief valve (6); the ambient temperature sensor (7) is connected to the air intake pneumatic control valve (5) for communication, and controls the opening and closing of the air intake pneumatic control valve (5).

2. The air-cooled explosion-proof electric control cabinet according to claim 1 is characterized in that: The air inlet pipe (2) is located on the inner side of the back plate of the explosion-proof box body (1), and the pipe opening of the air inlet pipe (2) is located on the left side plate of the explosion-proof box body (1).

3. The air-cooled explosion-proof electric control cabinet according to claim 2 is characterized in that: The ambient temperature sensor (7) is mounted on the back plate of the explosion-proof box body (1), and the exhaust pneumatic pressure relief valve (6) is located on the right side plate of the explosion-proof box body (1).

4. The air-cooled explosion-proof electric control cabinet according to claim 1 is characterized in that: The gap between the explosion-proof box body (1) and the pipe opening of the air inlet pipe (2), and the gap between the explosion-proof box body (1) and the pipeline connected to the exhaust pneumatic pressure relief valve (6) are sealed with explosion-proof sealing putty.

5. The air-cooled explosion-proof electric control cabinet according to claim 1 is characterized in that: The explosion-proof box further comprises a cable connection port (8), which is located on the bottom plate of the explosion-proof box body (1) and is used for inserting cables for controlling the explosion-proof box components.

6. The air-cooled explosion-proof electric control cabinet according to claim 5 is characterized in that: After the cable connection port (8) is inserted, the gap between the cable and the connection port is sealed with explosion-proof sealing glue.

7. The air-cooled explosion-proof electric control cabinet according to claim 1 is characterized in that: The air intake pneumatic control valve (5) and the exhaust pneumatic pressure relief valve (6) are intrinsically safe electromagnetic valves.

8. The air-cooled explosion-proof electric control cabinet according to claim 7 is characterized in that: The ambient temperature sensor (7) sets the maximum and minimum temperature values, and controls the air intake pneumatic control valve (5) and the exhaust pneumatic pressure relief valve (6) to control the on and off of compressed air.

9. The air-cooled explosion-proof electric control cabinet according to claim 1, characterized in that: The air intake pneumatic control valve (5) and the exhaust pneumatic pressure relief valve (6) are manual valves, and the temperature sensor (7) controls the alarm signal.

10. The air-cooled explosion-proof electric control cabinet according to claim 1, characterized in that: The fixing frame (3) is welded to the outside of the explosion-proof box body (1).

Images