CN-224233976-U - Mining flameproof and intrinsically safe variable-frequency speed regulation control box

Abstract

The utility model relates to the technical field of mining electrical equipment, in particular to a mining explosion-proof and intrinsically safe variable frequency speed regulation control box, which comprises a control box provided with a box door, wherein an explosion-proof cavity and an intrinsically safe cavity which are distributed up and down are formed in the control box by separation through a metal partition board, a heat dissipation cavity is arranged at the top end of the control box, the heat dissipation cavity and the explosion-proof cavity are physically isolated through a heat conduction metal wall, strong and weak electricity physical isolation can be realized through the explosion-proof cavity and the intrinsically safe cavity which are distributed up and down, energy channeling is avoided, the cavity distribution is optimized, meanwhile, maintenance personnel can operate in a zoned mode, explosion flame and pressure can be limited in the cavity by matching a stepped concave-convex structure with a double-layer sealing structure, explosion flame and high-temperature gas in the explosion-proof cavity are blocked, the external environment is prevented from being ignited, the explosion-proof reliability is realized.

Inventors

• DONG MEILING
• ZHENG LEI
• QI HAIHUI
• HUANG YONGCHAO
• YUAN ZHAOYANG
• LI XINYING
• ZHANG XUEFENG
• LIU TAO
• Han Houhai

Assignees

• 吉林省白山泵业机械有限责任公司

Dates

Publication Date

20260512

Application Date

20250528

Claims (6)

1. 1. The mining flameproof and intrinsically safe variable frequency speed regulation control box comprises a control box (1) provided with a box door, and is characterized in that the inside of the control box (1) is partitioned by a metal partition plate (101) to form a flameproof cavity (2) and a flame retardant (An Qiang) which are distributed up and down, the flameproof cavity (2) is arranged at the upper part, a frequency converter and a power module are arranged in the flameproof cavity, the flame retardant (An Qiang) is arranged at the lower part, an intrinsically safe control circuit is independently arranged and is electrically isolated from the flameproof cavity (2) through a through-wall binding post, a heat dissipation cavity (4) is arranged at the top end of the control box (1), and the heat dissipation cavity (4) is physically isolated from the flameproof cavity (2) through a heat conducting metal wall; The anti-explosion device is characterized in that a radiating fin (202) is arranged on the upper end face of the anti-explosion cavity (2), the radiating fin (202) penetrates through the heat conducting metal wall and extends to the inside of the radiating cavity (4), an air duct (401) is arranged at the top end of the inside of the radiating cavity (4), an air hole (403) is formed in the bottom end of the air duct (401) in a penetrating mode, the air hole (403) is opposite to the surface of the radiating fin (202), a fan (402) is arranged on the outer wall of the radiating cavity (4), an air inlet of the fan (402) is communicated with the outside, and an outlet of the fan is communicated with the air duct (401); The front side of the inside of the explosion-proof cavity (2) is provided with a door plate (203), and the contact surface of the door plate (203) and the opening of the explosion-proof cavity (2) is of a stepped concave-convex structure; The side walls of the explosion-proof cavity (2) and the explosion-proof body An Qiang are respectively provided with an inlet and outlet (5), the inlet and outlet (5) is close to the wiring terminal block in the corresponding cavity, and a double-layer sealing structure is adopted, the explosion-proof cavity comprises an outer layer sealing structure, an oil-resistant rubber sealing ring (501) is embedded into the inner side of a metal threaded compression nut, an inner layer sealing structure comprises an annular cavity (502) arranged on the inner side of the rubber sealing ring (501), and mining explosion-proof cement is filled in the annular cavity (502).
2. 2. The mining explosion-proof and intrinsically safe variable frequency speed control box is characterized in that heat conduction silica gel (201) is coated between the inner wall of the top of the explosion-proof cavity (2) and the radiating fins (202).
3. 3. The mining explosion-proof and intrinsically safe variable frequency speed control box of claim 1, wherein the control box (1) is welded by thickened steel plates.
4. 4. The mining explosion-proof and intrinsically safe variable frequency speed control box of claim 1, wherein the right side of the outer wall of the radiating cavity (4) is provided with an air outlet (404) which is obliquely downwards arranged, and a dustproof filter screen is embedded in the air outlet (404).
5. 5. The mining explosion-proof and intrinsically safe variable frequency speed control box of claim 1, wherein the radiating fins (202) are wavy aluminum fins.
6. 6. The mining explosion-proof and intrinsically safe variable frequency speed control box of claim 1, wherein the through-wall binding post is made of ceramic insulation material, and two ends of the through-wall binding post are fixed on a metal partition plate (101) through epoxy resin encapsulation.

Description

Mining flameproof and intrinsically safe variable-frequency speed regulation control box Technical Field The utility model relates to the technical field of mining electrical equipment, and particularly discloses a mining flameproof and intrinsically safe variable frequency speed regulation control box. Background The control box can be used as speed regulating device and starting switch of various equipments in mining area and other working face, when the equipments have the faults of overload, short circuit, overvoltage, undervoltage, etc., it can automatically cut off power supply and display fault signal, and the control box has the functions of leakage locking before closing, and can display current value and voltage value of each branch, and has the protection of undervoltage, overload, phase-lacking, short circuit and leakage locking, etc. in the line of alternating current 50Hz, rated voltage to 660V and rated total current to 90A and below. The traditional mining flameproof and intrinsically safe variable frequency speed regulation control box is characterized in that the flameproof circuit and the intrinsic safety circuit are arranged in the same cavity, the flameproof circuit and the intrinsic safety circuit are separated by a simple isolation plate, energy crosstalk is easy to cause, intrinsic safety signals malfunction, the junction surface of the box door and the cavity is sealed by a plane, sealing failure is easy to be caused by long-term vibration, a wire inlet and a wire outlet are sealed by single-layer rubber, flame is easy to leak in an explosion test, and therefore the mining flameproof and intrinsically safe variable frequency speed regulation control box is needed to solve the problem. Disclosure of utility model The utility model provides a mining explosion-proof and intrinsically safe variable frequency speed regulation control box, which can realize strong and weak electricity physical isolation through an explosion-proof cavity and an intrinsic safety cavity which are distributed up and down, avoid energy crosstalk, optimize the layout of a cavity, limit explosion flame and pressure in the cavity through a stepped concave-convex structure matched with a double-layer sealing structure, block explosion flame and high-temperature gas leakage in the explosion-proof cavity and realize the explosion-proof reliability. The utility model is realized in such a way, the mining flameproof and intrinsically safe variable frequency speed control box comprises a control box provided with a box door, wherein the inside of the control box is separated by a metal partition plate to form a flameproof cavity and an intrinsically safe cavity which are distributed up and down, the flameproof cavity is positioned at the upper part, a built-in frequency converter and a power module are arranged in the flameproof cavity, the intrinsically safe cavity is positioned at the lower part, an intrinsically safe control circuit is independently arranged and is electrically isolated from the flameproof cavity by a through-wall binding post, the top end of the control box is provided with a heat dissipation cavity, and the heat dissipation cavity and the flameproof cavity are physically isolated by a heat conducting metal wall; The upper end face of the explosion-proof cavity is provided with radiating fins, the radiating fins penetrate through the heat-conducting metal wall and extend to the inside of the radiating cavity, the top end of the inside of the radiating cavity is provided with an air duct, the bottom end of the air duct is provided with an air hole in a penetrating mode, the air hole is opposite to the surface of the radiating fins, the outer wall of the radiating cavity is provided with a fan, the air inlet of the fan is communicated with the outside, and the outlet of the fan is communicated with the air duct; the front side of the inner part of the explosion-proof cavity is provided with a door plate, and the contact surface of the door plate and the opening of the explosion-proof cavity is of a stepped concave-convex structure; The side walls of the explosion-proof cavity and the intrinsic safety cavity are respectively provided with a wire inlet and a wire outlet, the wire inlet and the wire outlet are close to the wiring terminal rows in the corresponding cavities, and a double-layer sealing structure is adopted, and the explosion-proof cavity comprises an outer layer sealing, an oil-resistant rubber sealing ring is embedded into the inner side of a metal threaded compression nut; and the inner layer is sealed, namely an annular cavity is formed in the inner side of the rubber sealing ring, and mining explosion-proof cement is filled in the annular cavity. As the mining flameproof and intrinsically safe variable frequency speed regulation control box is preferable, heat conduction silica gel is coated between the inner wall of the top of the flameproof cavity and the radiating fins. As the mini