Explosion-proof motor junction box

Abstract

The explosion-proof motor junction box comprises an upper shell, a lower shell, an explosion-proof layer and a sealing ring, the left side of the upper shell is provided with an input shaft, the lower shell is installed on the bottom end face of the upper shell, the right end face of the lower shell is provided with a first insertion sheet, a second insertion sheet is arranged behind the first insertion sheet, and the second insertion sheet is installed on the bottom end face of the upper shell. First bolts are installed at the four corners of the top end face of the upper shell, the anti-explosion layer is installed on the inner surface of the lower shell in a surrounding mode, the sealing ring is arranged at the edge of the top end face of the lower shell, first internal threads are arranged at the four corners of the anti-explosion rubber and the four corners of the lower shell, and the outer surfaces of the upper shell and the lower shell are sleeved with an anti-explosion cover. According to the explosion-proof motor junction box, internal sparks or flames can be prevented from diffusing to the external environment through the design of the explosion-proof layer and the sealing ring, so that the risk of fire disasters is reduced, combustible substances can be prevented from entering a protector through the sealing structure, the combustible substances are prevented from being in contact with electrical elements or circuits, and the danger of fire disasters and explosion is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of junction boxes, in particular to an explosion-proof motor junction box. Background Art

[0002] The use of junction boxes has become one of the very common items in people's daily lives. Junction boxes are one of the electrical auxiliary materials, because the wires used for decoration pass through the wire tube, and at the joints of the wires (for example, the line is relatively long, or the wire tube needs to turn a corner), junction boxes are used as transitions. The wire tube is connected to the junction box, and the wires in the wire tube are connected in the junction box, which plays a role in protecting and connecting the wires. Junction boxes are also often used when using explosion-proof motors.

[0003] As disclosed in the patent document of application number 202111190551.5, a junction box for explosion-proof motors is disclosed in the present invention, including a base assembly, wherein the base assembly includes a base, a fixed platform, a junction platform, an inner winding column, a baffle, a terminal, an outer winding column, a fixed card slot, a top circular groove of the base, an inner arc groove of the base, a ball, a ball groove, a spring groove, a compression spring, and a wiring hole. A top circular groove of the base is provided near the outer side of the top surface of the base, and eight inner arc grooves of the base are provided on the bottom surface of the top circular groove of the base, and a plurality of ball grooves are provided on the top surface of the top circular groove of the base, and balls are movably installed inside the ball grooves. The invention cooperates with the bottom buckle of the truncated table and the inner arc groove of the base, so that when the device is in use, when the orientation of the device needs to be changed, the rotating truncated table can be lifted upward, and then the rotating truncated table can be rotated to change the direction, thereby improving the operating efficiency of the device and reducing unnecessary disassembly and assembly operations.

[0004] Similar junction boxes are easily affected by external vibrations because several lines are brought together during wiring, and the gravity of the lines themselves causes the lines to sag or loosen, making the lines loose, which can easily generate sparks and short circuits. In addition, there are usually flammable materials such as wires and cables in the junction box. Once a fire occurs, it is easy for the fire to spread.

[0005] Therefore, in view of this, the existing structural deficiencies are studied and improved, and an explosion-proof motor junction box is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide an explosion-proof motor junction box. During wiring, several lines are brought together and are easily affected by external vibrations, and the gravity of the lines themselves causes the lines to sag or loosen, thereby making the lines loose, which is prone to sparks and short circuits. In addition, there are usually flammable materials such as wires and cables in the junction box. Once a fire occurs, it is easy to cause the fire to spread.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an explosion-proof motor junction box, comprising an upper shell, a lower shell, an upper wiring tube, a gathering assembly and a flame retardant layer, the upper end face of the upper shell being welded with a reinforcement frame, the lower shell being arranged on the lower end face of the upper shell, the upper wiring tube being arranged on the outside of the upper shell, the upper wiring tube being arranged in three groups, the outside of the lower shell being arranged with a lower wiring tube, the lower wiring tube being arranged in three groups, bolts are arranged at the four corners of the upper end face of the upper shell, threaded holes are arranged at the four corners of the upper end face of the lower shell, the inner cavities of the upper shell and the lower shell are both provided with interlayers, the inner cavities of the interlayers are provided with steel plates, and the flame retardant layer is arranged on the inner surfaces of the upper shell and the lower shell.

[0008] Furthermore, the upper shell and the lower shell form a group of junction box structures, the upper wiring tube and the lower wiring tube are located correspondingly, and the upper wiring tube and the lower wiring tube form a group of wiring port structures.

[0009] Furthermore, the gathering component includes an upper jaw, a lower jaw, a movable pin and a spring. The upper jaw is arranged on the inner surface of the upper wiring tube, and the lower jaw is arranged on the inner surface of the lower wiring tube. The inner cavities of the upper wiring tube and the lower wiring tube are both provided with movable pins, and the outer surfaces of the two groups of movable pins are both sleeved with springs.

[0010] Furthermore, one end of one group of the movable pins passes through the upper wiring tube and is connected to the upper clamping jaw, and one end of the other group of the movable pins passes through the lower wiring tube and is connected to the lower clamping jaw.

[0011] Furthermore, the bolts and the threaded holes have the same diameter, and the four groups of bolts penetrate the inner cavity of the upper shell and mesh with the threaded holes.

[0012] Furthermore, the flame retardant layer is made of polyimide, the reinforcement frame is in a tic-tac-toe shape, and the upper clamping jaw and the lower clamping jaw are intertwined with each other.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the lines at the wiring ports are gathered together by the gathering component, so that the lines can be fixed in position, sparks and explosions caused by loosening and falling of the lines can be prevented, and the inside of the junction box is protected by the flame retardant layer, which isolates the contact with the flame and forms a heat insulation layer to prevent the fire from spreading and protect surrounding equipment and personnel. The specific contents are as follows:

[0014] A bundling component, an upper wiring tube and a lower wiring tube are provided. After a movable pin penetrates the upper wiring tube and the lower wiring tube, they are respectively connected to an upper clamp and a lower clamp. One end is fixed on the outer surface, and the other end generates a force on the inner surface of the wiring port structure through a spring on the outer surface of the pin. When the operator needs to bundle the line, he pinches one end of the movable pin and pulls it out. Due to the force of the inner cavity spring's own elastic force on the movable pin, the movable pin has resilience, and then the upper clamp and the lower clamp at the end of the movable pin are crossed together. After the movable pin is released, the reaction force generated by the spring causes the upper clamp and the lower clamp to clamp and tighten the line, thereby bundling the line.

[0015] A flame retardant layer is provided, and the flame retardant layer of polyimide material provides an isolation layer when sparks continue to be generated in the circuit. Since the polyimide material will form a carbonized layer under high temperature burning, it can effectively isolate the fire source, prevent the fire from spreading, and prevent explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an explosion-proof motor junction box of the utility model;

[0017] Figure 2 This is a three-dimensional structural schematic diagram of an upper shell of an explosion-proof motor junction box of the utility model;

[0018] Figure 3 This is a three-dimensional structural schematic diagram of a lower shell of an explosion-proof motor junction box of the utility model;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of a bundling component of an explosion-proof motor junction box of the utility model;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of a cross-state of a bundling component of an explosion-proof motor junction box according to the utility model.

[0021] In the figure: 1. upper shell; 2. lower box body; 3. upper wiring tube; 31. lower wiring tube; 4. reinforcement frame; 5. bolts; 6. threaded holes; 7. interlayer; 71. steel plate; 8. bundling assembly; 801. upper clamp; 802. lower clamp; 803. movable pin; 804. spring; 9. flame retardant layer. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0023] like Figures 1 to 5As shown, an explosion-proof motor junction box includes an upper shell 1, a lower shell 2, an upper wiring tube 3, a bundling assembly 8 and a flame retardant layer 9. A reinforcement frame 4 is welded to the upper end surface of the upper shell 1. The upper shell 1 serves as the outer shell of the junction box to protect the internal parts from the external environment and provide structural support. The reinforcement frame 4 is in a tic-tac-toe shape. The tic-tac-toe structure of the reinforcement frame 4 can effectively increase the bearing capacity of the upper shell 1, making it more pressure-resistant, thereby improving the safety of the equipment. The lower shell 2 is arranged on the lower end surface of the upper shell 1, and the lower shell 2 serves as the support bottom of the upper shell 1. The seat provides a closed space for the internal circuit at the same time to ensure the safe operation of the circuit. The upper shell 1 and the lower shell 2 form a set of junction box structures. The upper wiring tube 3 is arranged on the outer side of the upper shell 1. There are three sets of upper wiring tubes 3. The outer side of the lower shell 2 is provided with a lower wiring tube 31. There are three sets of lower wiring tubes 31. The positions of the upper wiring tubes 3 and the lower wiring tubes 31 correspond to each other. The upper wiring tubes 3 and the lower wiring tubes 31 form a set of wiring port structures. By arranging multiple sets of upper wiring tubes 3 and lower wiring tubes 31, the motor circuit is guided to the wiring port structure, which protects the circuit safety and facilitates connection.

[0024] Bolts 5 are provided at the four corners of the upper end surface of the upper shell 1, and threaded holes 6 are provided at the four corners of the upper end surface of the lower shell 2. The bolts 5 and the threaded holes 6 are used to connect the upper shell 1 and the lower shell 2, which enhances the overall stability and sealing of the junction box. The bolts 5 and the threaded holes 6 have the same aperture size. Four groups of bolts 5 penetrate the inner cavity of the upper shell 1 and mesh with the threaded holes 6. The bolts 5 penetrate the upper shell 1 and mesh with the threaded holes 6 to achieve a fastening connection of the shells, ensuring that the junction box structure is firm and the upper shell 1 and the lower shell 2 are firmly connected. The inner cavity of the interlayer 7 is provided with an interlayer 7, and the inner cavity of the interlayer 7 is provided with a steel plate 71. The steel plate 71 in the interlayer 7 provides reinforcement for the junction box, and enhances the overall structural strength of the junction box. The flame retardant layer 9 is provided on the inner surface of the upper shell 1 and the lower shell 2. The material of the flame retardant layer 9 is polyimide. The flame retardant layer 9 made of polyimide provides an isolation layer when the circuit continues to generate sparks. Since the polyimide material will form a carbonized layer under high temperature burning, it can effectively isolate the fire source, prevent the fire from spreading, and prevent explosions;

[0025] The bundling assembly 8 includes an upper clamping jaw 801, a lower clamping jaw 802, a movable pin 803 and a spring 804. The upper clamping jaw 801 is arranged on the inner surface of the upper wiring tube 3, and the lower clamping jaw 802 is arranged on the inner surface of the lower wiring tube 31. The upper clamping jaw 801 and the lower clamping jaw 802 are intersected with each other. The upper clamping jaw 801 and the lower clamping jaw 802 are arranged together by crossing to form a clamping force, so that the cable line is limited and protected. The inner cavities of the upper wiring tube 3 and the lower wiring tube 31 are both provided with movable pins 803, and the outer surfaces of the two sets of movable pins 803 are sleeved with Spring 804, one end of one group of movable pins 803 passes through the upper wiring tube 3 and is connected to the upper clamping jaw 801, and one end of the other group of movable pins 803 passes through the lower wiring tube 31 and is connected to the lower clamping jaw 802. One end of each group of movable pins 803 is fixed to the outer surface of the upper wiring tube 3 and the lower wiring tube 31, and the other end generates a force on the inner surface of the wiring port structure through the spring 804 on the outer surface of the pin body. The reaction force generated by the spring 804 makes the upper clamping jaw 801 and the lower clamping jaw 802 cross-clamped, thereby clamping and converging multiple groups of lines.

[0026] In summary, if Figures 1 to 5 As shown, the explosion-proof motor junction box, the upper shell 1 and the lower shell 2 are combined into a set of junction box structures, and the bolts 5 penetrate the four corners of the upper shell 1 and mesh with the threaded holes 6 at the four corners of the lower shell 2. During installation, the operator only needs to rotate the bolts 5 to insert the upper shell 1 and connect it with the threaded holes 6 to achieve installation and fixation. When disassembly is required, the same operation can be performed. The well-shaped reinforcement frame 4 increases the overall strength of the upper shell 1, and the interlayer 7 increases the strength of the junction box structure through the strength of the steel plate 71;

[0027] When the line needs to be bundled during line connection, the operator pinches one end of the movable pin 803 in the bundling assembly 8 and pulls it. Since the other end is connected to the upper wiring tube 3, and the other group of movable pins 803 is connected to the lower wiring tube 31, all movable pins 803 will not be pulled out. When the spring 804 on the outer surface of the movable pin 803 is pulled, the movable pin 803 can be pulled by passing through the upper wiring tube 3, but the spring 804 is blocked on the inner surface of the upper wiring tube 3. Due to its own elastic force, the force of the upper clamping claw 801 is resisted, making the movable pin 803 have resilience. Then the movable pin is pulled out. The upper clamping jaw 801 at the end of 803 is crossed with the lower clamping jaw 802 of another set of movable pins 803. After the movable pin 803 is released, the reaction force generated by the spring 804 causes the upper clamping jaw 801 and the lower clamping jaw 802 to clamp and tighten the circuit, thereby converging the circuit. The flame retardant layer 9 of the polyimide material protects the inside of the junction box. If a short circuit spark occurs in the internal circuit, the polyimide material will form a group of carbonized layers under high temperature burning, thereby protecting the inner surfaces of the upper shell 1 and the lower shell 2, blocking the spark inside the box body, thereby preventing the spark from further spreading.

Claims

1. An explosion-proof motor junction box, comprising an upper shell (1), a lower shell (2), an upper wiring tube (3), a bundling component (8) and a flame retardant layer (9), characterized in that: The upper end surface of the upper shell (1) is welded with a reinforcement frame (4); the lower shell (2) is arranged on the lower end surface of the upper shell (1); the upper wiring tube (3) is arranged on the outer side of the upper shell (1); three groups of the upper wiring tube (3) are arranged; the outer side of the lower shell (2) is provided with a lower wiring tube (31); three groups of the lower wiring tube (31) are arranged; bolts (5) are arranged at the four corners of the upper end surface of the upper shell (1); threaded holes (6) are arranged at the four corners of the upper end surface of the lower shell (2); the inner cavities of the upper shell (1) and the lower shell (2) are both provided with an interlayer (7); the inner cavity of the interlayer (7) is provided with a steel plate (71); and the flame retardant layer (9) is arranged on the inner surfaces of the upper shell (1) and the lower shell (2).

2. The explosion-proof motor junction box according to claim 1, characterized in that: The upper shell (1) and the lower shell (2) form a set of junction box structures, the upper junction tube (3) and the lower junction tube (31) correspond in position to each other, and the upper junction tube (3) and the lower junction tube (31) form a set of junction port structures.

3. The explosion-proof motor junction box according to claim 2, characterized in that: The bundling assembly (8) comprises an upper clamping jaw (801), a lower clamping jaw (802), a movable pin (803) and a spring (804); the upper clamping jaw (801) is arranged on the inner surface of the upper wiring tube (3); the lower clamping jaw (802) is arranged on the inner surface of the lower wiring tube (31); the inner cavities of the upper wiring tube (3) and the lower wiring tube (31) are both provided with movable pins (803); and the outer surfaces of the two groups of movable pins (803) are both sleeved with springs (804).

4. The explosion-proof motor junction box according to claim 3, characterized in that: One end of one group of movable pins (803) passes through the upper wiring tube (3) and is connected to the upper clamp (801), and one end of another group of movable pins (803) passes through the lower wiring tube (31) and is connected to the lower clamp (802).

5. The explosion-proof motor junction box according to claim 4, characterized in that: The bolts (5) and the threaded holes (6) have the same hole diameter, and four groups of the bolts (5) penetrate the inner cavity of the upper shell (1) and mesh with the threaded holes (6).

6. The explosion-proof motor junction box according to claim 4, characterized in that: The flame retardant layer (9) is made of polyimide, the reinforcement frame (4) is in a tic-tac-toe shape, and the upper clamping jaw (801) and the lower clamping jaw (802) are intertwined with each other.

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