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Positive pressure type explosion-proof control cabinet

A technology of control cabinets and control boxes, which is applied in the direction of sealed enclosures, etc., and can solve problems such as small range of dangerous places, unsuitable equipment for sparks or arcs, and prone to flash accidents, etc.

Pending Publication Date: 2018-01-30
QINGDAO OUSHENG LIGHTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In petrochemical and other production enterprises, the content of volatile gases such as flammable and explosive in the working environment is relatively high. Once these gases come into contact with sparks, flash explosion accidents are likely to occur. Therefore, try to avoid placing equipment that will generate sparks in the production workshop. However, due to Production requires that some control cabinets must be installed in these hazardous areas of explosive gas atmospheres, and the existing explosion-proof equipment is mostly of increased safety type. Applicable to equipment that generates sparks or arcs during normal operation, so an explosion-proof control box suitable for a wide range of applications and explosive gas atmospheres is required

Method used

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  • Positive pressure type explosion-proof control cabinet
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  • Positive pressure type explosion-proof control cabinet

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Embodiment Construction

[0013] Such as figure 1 As shown, the positive pressure explosion-proof control cabinet of the present invention is composed of a cabinet body 1, a main cavity element assembly 2, an explosion-proof solenoid valve, a throttle valve and a pressure switch. The cabinet body 1 is a closed structure, and the The top of the cabinet 1 is provided with an alarm 23. The cabinet 1 is composed of the main cabinet 3 and the auxiliary cabinet 4. In the main cabinet 3, the upper part is the electrical cavity 5, the lower part is the wiring cavity 6, and the electrical cavity 5 Component assembly 2 is arranged inside, electrical chamber door 7 is provided on electrical chamber 5, indicator light group 8 and button group 21 are provided on electrical chamber door 7, wiring chamber door 9 is provided on wiring chamber 6, and auxiliary cabinet body 4 is provided with auxiliary box body cabinet door 20, and described auxiliary box body cabinet door 20 is provided with glass window 22, and the po...

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PUM

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Abstract

The invention provides a positive pressure type explosion-proof control cabinet and relates to the technical field of explosion-proof devices. The control cabinet is composed of a cabinet body, a maincavity element component, explosion-proof electromagnetic valves, throttle valves and pressure switches. The main cabinet body of the cabinet body is composed of an electrical cavity, an electrical cavity cabinet door, a wiring cavity and a wiring cavity door. An element component is arranged in the electrical cavity. An indicator light group and a button group are arranged on the electrical cavity cabinet door. An auxiliary box body door is arranged on the auxiliary cabinet body of the cabinet body. The inlet end of the cabinet body is connected with the explosion-proof electromagnetic valveI, the multi-stage oil-water filter and a throttle valve I in turn. The drainage end of the cabinet body is connected with the throttle valve II and the explosion-proof electromagnetic valve II in turn. The pressure switch I, the pressure switch II, the pressure switch III and a pressure gauge are connected with the pipeline of the cabinet body. An explosion-proof control box is in circuit connection with the throttle valve I, the throttle valve II, the indicator light group and the button group. According to the invention, the control cabinet has a wide application range; due to the passivity and stability of an inert gas, the inert gas is filled into the control cabinet; the internal pressure of the cabinet body is always greater than the atmospheric pressure; and the electrical operation in the control cabinet is ensured.

Description

technical field [0001] The invention relates to the technical field of explosion-proof equipment, in particular to a positive pressure type explosion-proof control cabinet. Background technique [0002] In petrochemical and other production enterprises, the content of volatile gases such as flammable and explosive in the working environment is relatively high. Once these gases come into contact with sparks, flash explosion accidents are likely to occur. Therefore, try to avoid placing equipment that will generate sparks in the production workshop. However, due to Production requires that some control cabinets must be installed in these hazardous areas of explosive gas atmospheres, and the existing explosion-proof equipment is mostly of increased safety type. It is suitable for equipment that generates sparks or arcs under normal operation, so an explosion-proof control box suitable for a wide range of applications and explosive gas atmospheres is required. Contents of the ...

Claims

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Application Information

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IPC IPC(8): H05K5/06
Inventor 张广庆宋文强张博伦
Owner QINGDAO OUSHENG LIGHTING CO LTD
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