An explosion-proof electrical box

Abstract

The invention relates to a box cabinet for electric equipment, in particular to an explosion-proof electrical box; the box cabinet comprises a box body, an opening and closing mechanism, a sealing mechanism and an injection mechanism; the box body is hinged with a box door; an opening and closing mechanism is arranged between the box body and the box door, and the box door is opened and closed by the opening and closing mechanism; the sealing mechanism comprises a movable plate and a sealing plate; the opening and closing mechanism is linked with the movable plate and the sealing plate, a plurality of exhaust ports are arranged in the box body, the positions of the movable plate and the sealing plate correspond to the exhaust ports, and all the exhaust ports are closed when the movable plate and the sealing plate are moved to fit with the box body; the injection mechanism comprises an inflation valve, an inflation valve is installed on the inner wall of the box body, and the inflation valve is connected to a storage box through a gas transmission pipe; the inflation valve is provided with an adjustment button, which extends to the outside of the box body and corresponds to the position of the sealing plate; the invention reduces the concentration of hydrogen around the outside of the box body, and solves the problem of explosion caused by hydrogen entering the box body when the box door is opened.

Description

Technical Field

[0001] The invention relates to a cabinet for electric equipment, in particular to an explosion-proof electrical appliance box. Background Art

[0002] Explosion-proof electrical box is a type of distribution box with explosion-proof performance, mainly including explosion-proof lighting distribution box, explosion-proof power distribution box, explosion-proof and anti-corrosion distribution box, etc. Explosion-proof electrical box is suitable for power wiring in flammable and explosive places such as petrochemical equipment, oil platforms, chemical industry, pharmaceuticals, coal, smelting, shipbuilding, military industry and textiles. Due to the wide applicability of explosion-proof electrical boxes, different design types of explosion-proof electrical boxes will be used for different scenarios.

[0003] The battery room is needed when the ship is sailing. When the lead-acid battery in the battery room is charged, it will undergo a water electrolysis reaction, that is, water is electrolyzed into hydrogen and oxygen. Therefore, a certain amount of hydrogen and oxygen will inevitably be released. In order to protect the electrical appliances near the battery room and prevent the electric sparks generated at work from igniting the hydrogen and causing an explosion, an explosion-proof electrical box is needed. Existing explosion-proof electrical boxes mostly use isolation to prevent hydrogen from contacting the internal electrical appliances. However, since air cannot enter seamlessly, when workers inspect the electrical appliances in the explosion-proof electrical box, they must open the box door, which will cause hydrogen to enter and it is impossible to completely avoid contact; therefore, there are potential safety hazards. Summary of the invention

[0004] The present invention overcomes the deficiencies of the prior art and provides an explosion-proof electrical box; the present invention is achieved through the following technical solutions.

[0005] An explosion-proof electrical box comprises a box body, a box door is hingedly connected to the box body, and also comprises an opening and closing mechanism, a sealing mechanism and an injection mechanism;

[0006] The opening and closing mechanism includes a spring, a mounting slot is provided on the box door, a spring is provided inside the mounting slot, one end of the spring is fixedly connected to the mounting slot, and the other end of the spring is fixedly connected to a moving block, the moving block is slidably arranged in the mounting slot, a connecting rod is installed on the moving block, and the outer surface of the connecting rod is rotatably connected to the first gear; a moving slot is provided on the surface of the box body, a second gear is provided inside the moving slot, a tooth slot is provided on the inner wall surface of the moving slot, and the second gear is meshed and connected with the first gear through the cooperation of the tooth slot; a recovery slot is provided on the surface of the box body, a positioning plate is fixedly connected in the recovery slot, and a rubber gasket is installed on one side of the positioning plate, and when the first gear moves to the recovery slot, the first gear enters the recovery slot with the cooperation of the second gear, and the rubber gasket at the recovery slot clamps and locks the connecting rod;

[0007] The sealing mechanism includes a movable plate and a sealing plate; the second gear is fixedly connected to a fixed rod, a through slot is provided at a position of the box body corresponding to the fixed rod, the through slot is provided along the direction of the movable slot, the fixed rod passes through the through slot and is connected to the movable plate, the movable plate is fitted with the outer surface of the box body, the movable plate is connected with a sealing plate, a plurality of exhaust ports are provided in the box body, the positions of the movable plate and the sealing plate and the exhaust ports correspond, and when the movable plate and the sealing plate are moved to fit with the box body, all the exhaust ports are closed;

[0008] The injection mechanism includes an inflation valve, which is installed on the inner wall of the box body and connected to the storage box through an air pipe; the inflation valve is provided with an adjustment button, which extends to the outside of the box body and corresponds to the position of the sealing plate.

[0009] Furthermore, a storage box is installed on the top surface of the box body, and a control panel is installed on the front surface of the storage box.

[0010] Furthermore, two doors are arranged on the front side of the box body; and opening and closing mechanisms are arranged on the top and bottom surfaces of the two doors.

[0011] Furthermore, through grooves are provided at the top and bottom of the box body at positions corresponding to the fixed rods, and movable plates are provided at the top and bottom of the box body; a sealing plate is fixedly connected between the upper and lower movable plates on the same side.

[0012] Furthermore, inflation valves are installed on the inner walls on both sides of the box body, and the adjustment buttons of the inflation valves on both sides correspond to the positions of the sealing plates on the same side respectively.

[0013] The beneficial effects of the present invention compared with the prior art are as follows:

[0014] The present invention uses the cooperation of the mounting groove, the spring, the moving block, the connecting rod and the first gear, and utilizes the box door to adjust the inert gas content in the box when opening and closing, so that when the box door is opened, the relationship between the inflation valve and the adjustment button is utilized to change the inflation power and inflation flow rate of the inflation valve, so that the inert gas is exhausted to the surroundings through the exhaust port, thereby reducing the concentration of hydrogen around the outside of the box and avoiding explosion caused by electrical sparks. This solves the problem that when workers check electrical appliances in the explosion-proof electrical box, they must open the box door, which will cause hydrogen to enter and the electrical sparks will ignite the hydrogen to cause an explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is one of the overall structural schematic diagrams of the present invention;

[0016] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0017] Figure 3 This is the third schematic diagram of the overall structure of the present invention;

[0018] Figure 4 for Figure 1 Schematic diagram of the structure at A in the middle;

[0019] Figure 5 for Figure 2 Schematic diagram of the structure at B in the middle;

[0020] Figure 6 for Figure 3 Schematic diagram of the structure at point C in the figure.

[0021] In the figure:

[0022] 1. Box body; 2. Box door; 3. Mounting groove; 4. Spring; 5. Moving block; 6. Connecting rod; 7. First gear; 8. Moving groove; 9. Second gear; 10. Tooth groove; 11. Fixed rod; 12. Moving plate; 13. Sealing plate; 14. Recovery groove; 15. Positioning plate; 16. Rubber gasket; 17. Inflating valve; 18. Air pipe; 19. Storage box; 20. Adjustment button; 21. Control panel; 22. Exhaust port. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0024] See also Figures 1 to 6 , this embodiment provides an explosion-proof electrical box, including a box body 1, an opening and closing mechanism, a sealing mechanism and an injection mechanism;

[0025] The front end surface of the box body 1 is rotatably connected with a box door 2 through a hinge, and the box body 1 and the box door 2 are used to store and protect the electrical appliances;

[0026] The upper and lower surfaces of the front end of the box body 1 and the upper and lower surfaces of the box door 2 are equipped with an opening and closing mechanism, which can quickly limit the box door 2, facilitate the subsequent work of the staff, and provide a force to the sealing mechanism;

[0027] Sealing mechanisms are installed on both sides of the box body 1 to prevent external hydrogen from entering the box body 1;

[0028] An injection mechanism is installed on the top surface of the box body 1, and the injection mechanism can inject inert gas into the box body 1. The inert gas makes it difficult for hydrogen to enter the explosion-proof electrical box and can dilute the hydrogen concentration outside the explosion-proof electrical box.

[0029] Specifically, the opening and closing mechanism includes a spring 4. The top and bottom surfaces of the two cabinet doors 2 are provided with mounting grooves 3. The mounting grooves 3 are provided with springs 4. One end of the spring 4 is fixedly connected to the mounting grooves 3. The other end of the spring 4 is fixedly connected to a moving block 5. The moving block 5 is slidably arranged in the mounting grooves 3. A connecting rod 6 is installed on the moving block 5. The outer surface of the connecting rod 6 is rotatably connected to a first gear 7. The front end surfaces of the top and bottom of the cabinet 1 are provided with moving grooves 8. The second gear 9 is installed in the moving grooves 8. The inner wall surface of the moving grooves 8 is provided with tooth grooves 10. The second gear 9 is meshed and connected with the first gear 7 through the cooperation of the tooth grooves 10. When the cabinet door 2 is closed, the cabinet 1 squeezes the first gear 7. The first gear 7 is meshed and connected with the second gear 9 and rotates together. The cabinet door 2 is gradually closed to squeeze the first gear 7 from the hinged end of the cabinet door 2 and the cabinet 1 to the other end. The top and bottom front end surfaces of the box body 1 are provided with recovery grooves 14, and a positioning plate 15 is fixedly connected to the recovery groove 14. A rubber gasket 16 is installed on one side of the positioning plate 15. When the first gear 7 moves to the recovery groove 14, the first gear 7 enters the recovery groove 14 with the cooperation of the second gear 9, and the rubber gasket 16 at the recovery groove 14 can clamp and lock the connecting rod 6, so as to facilitate the closing of the box door 2.

[0030] The sealing mechanism includes a movable plate 12 and a sealing plate 13; the second gear 9 is fixedly connected to a fixed rod 11, and through grooves are provided at the top and bottom of the box body 1 corresponding to the positions of the fixed rod 11, and the through grooves are arranged along the direction of the movable groove 8, and the fixed rod 11 passes through the through grooves and is connected to the movable plate 12, and the movable plate 12 is fitted with the outer surface of the box body 1, and three sealing plates 13 are fixedly connected between the upper and lower movable plates 12 on the same side; exhaust ports 22 are opened on the top, bottom and side walls of the box body 1, and the positions of the movable plate 12 and the sealing plate 13 correspond to the exhaust ports 22, and when the movable plate 12 and the sealing plate 13 are moved to fit with the box body 1, all the exhaust ports 22 are closed.

[0031] The injection mechanism includes an inflation valve 17, and the inflation valves 17 are installed on the inner walls of both sides of the box body 1. An air pipe 18 is fixedly connected to the surface of one side of the inflation valve 17, and a storage box 19 is installed on the top surface of the box body 1, and the other end of the air pipe 18 is fixedly connected to the storage box 19; the inflation valve 17 is provided with an adjustment button 20, which extends to the outside of the box body 1 and corresponds to the position of the sealing plate 13; a control panel 21 is installed on the front end surface of the storage box 19.

[0032] When the box door 2 is closed, it will drive the fixing rod 11 to move toward the center of the box body 1, and then drive the moving plate 12 and the sealing plate 13 to move toward the center of the box body 1 through the fixing rod 11, blocking the exhaust port 22 opened in the box body 1. At the same time, the sealing plate 13 squeezes the adjustment button 20 when moving toward the center of the box body 1, thereby reducing the inflation flow rate of the inflation valve 17 until the inflation valve 17 is closed.

[0033] The working principle of an explosion-proof electrical box is as follows: when the device is needed, inert gas is injected into the storage box 19 in advance, and then the electrical appliances that need to be protected are placed in the box body 1, and then the box door 2 is closed. In the process of closing the box door 2, since the box body 1 squeezes the first gear 7 when the box door 2 is closed, the first gear 7 is meshed and connected with the second gear 9 and rotates together, and the box door 2 gradually closes to squeeze the first gear 7 to the other end, until the first gear 7 moves to the recovery groove 14, the first gear 7 enters the recovery groove 14 with the cooperation of the second gear 9, and the rubber gasket 16 at the recovery groove 14 clamps and locks the connecting rod 6, so that the box door 2 is closed.

[0034] When the box door 2 is closed, the movable plate 12 and the sealing plate 13 are driven by the fixed rod 11 to move toward the center of the box body 1, and the exhaust port 22 opened in the box body 1 is blocked. When the sealing plate 13 moves toward the center of the box body 1, it squeezes the adjustment button 20, thereby reducing the inflation flow rate of the inflation valve 17. When the box door 2 is opened, the reverse operation is started, the sealing plate 13 and the movable plate 12 no longer block the exhaust port 22, and no longer squeeze the adjustment button 20, thereby opening and increasing the inflation flow rate of the inflation valve 17, so that the inert gas is exhausted to the surroundings through the exhaust port 22, dispersing the surrounding hydrogen concentration, and avoiding explosion caused by electrical sparks.

[0035] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. An explosion-proof electrical box, comprising a box body (1), wherein the box body (1) is hingedly connected to a box door (2); characterized in that: It also includes an opening and closing mechanism, a sealing mechanism and an injection mechanism; The opening and closing mechanism comprises a spring (4); the box door (2) is provided with a mounting groove (3); a spring (4) is provided inside the mounting groove (3); one end of the spring (4) is fixedly connected to the mounting groove (3); the other end of the spring (4) is fixedly connected to a moving block (5); the moving block (5) is slidably arranged in the mounting groove (3); a connecting rod (6) is installed on the moving block (5); the outer surface of the connecting rod (6) is rotatably connected to a first gear (7); a moving groove (8) is provided on the surface of the box body (1); a second gear (9) is provided inside the moving groove (8); the moving groove ( 8) a tooth groove (10) is provided on the inner wall surface, and the second gear (9) is meshed and connected with the first gear (7) through the cooperation of the tooth groove (10); a recovery groove (14) is provided on the surface of the box body (1), a positioning plate (15) is fixedly connected in the recovery groove (14), and a rubber gasket (16) is installed on one side of the positioning plate (15); when the first gear (7) moves to the recovery groove (14), the first gear (7) enters the recovery groove (14) with the cooperation of the second gear (9), and the rubber gasket (16) at the recovery groove (14) clamps and locks the connecting rod (6); The sealing mechanism comprises a movable plate (12) and a sealing plate (13); the second gear (9) is fixedly connected to a fixed rod (11); through grooves are provided at the top and bottom of the box body (1) at positions corresponding to the fixed rod (11); the movable plate (12) is provided at the top and bottom of the box body (1); a sealing plate (13) is fixedly connected between the upper and lower movable plates (12) located on the same side; the through groove is arranged along the direction of the movable groove (8); the fixed rod (11) passes through the through groove and is connected to the movable plate (12); the movable plate (12) is fitted with the outer surface of the box body (1); a plurality of exhaust ports (22) are provided on the box body (1); the positions of the movable plate (12) and the sealing plate (13) correspond to the exhaust ports (22); when the movable plate (12) and the sealing plate (13) are moved to fit with the box body (1), all the exhaust ports (22) are closed; The injection mechanism comprises an inflation valve (17), and the inflation valves (17) are installed on the inner walls of both sides of the box body (1), and a gas supply pipe (18) is fixedly connected to the surface of one side of the inflation valve (17), and a storage box (19) is installed on the top surface of the box body (1), and the other end of the gas supply pipe (18) is fixedly connected to the storage box (19); the inflation valve (17) is provided with an adjustment button (20), and the adjustment button (20) extends to the outside of the box body (1) and corresponds to the position of the sealing plate (13); the storage box (19) is filled with inert gas.

2. An explosion-proof electrical box according to claim 1, characterized in that: The storage box (19) is installed on the top surface of the box body (1), and a control panel (21) is installed on the front surface of the storage box (19).

3. An explosion-proof electrical box according to claim 1, characterized in that: Two box doors (2) are provided on the front side of the box body (1); the top surfaces and bottom surfaces of the two box doors (2) are both provided with opening and closing mechanisms.

Images