A flame-retardant wiring protection device in a distribution box

Abstract

This invention relates to a wiring protection device for a flame-retardant distribution box, comprising a distribution box body, a cover movably connected to the surface of the distribution box body, an inlet hole on the left side and an outlet hole on the right side of the distribution box body, a wiring fixing mechanism inside the distribution box body, and a detection and cooling mechanism on the left side of the inner cavity of the distribution box body. The detection and cooling mechanism includes a cooling box fixedly connected to the inside of the distribution box body, a partition dividing the interior of the cooling box into an air blowing slot and a detection slot fixedly connected to the middle of the inner cavity of the cooling box, a motor inside the air blowing slot, a fan blade fixedly connected to the output shaft of the motor, and air blowing holes on the surface of the cooling box and on the side of the air blowing slot. When the temperature of the distribution box body rises, cold air is used to cool the interior of the flame-retardant distribution box body, resulting in good cooling effect, improving the protection performance of the wiring, ensuring normal operation of the wiring; high temperature situations can be detected and eliminated in a timely manner, avoiding the situation of the wiring inside the distribution box burning out due to high temperature, ensuring safety and reliability.

Description

Technical Field

[0001] This invention relates to the field of electrical distribution box technology, and in particular to a line protection device inside a flame-retardant electrical distribution box. Background Technology

[0002] Distribution boxes are electrical equipment characterized by their small size, easy installation, special technical performance, fixed location, unique configuration functions, lack of site restrictions, widespread application, stable and reliable operation, high space utilization, small footprint, and environmental benefits. The massive parameters on the distribution box data generally constitute a low-voltage distribution box. According to the electrical wiring requirements, switching equipment, measuring instruments, protective electrical appliances, and auxiliary equipment are assembled in a closed or semi-closed metal cabinet or panel to form a low-voltage distribution box. When protecting the lines inside the distribution box, protective structures are required.

[0003] Patent publication number CN112018674A discloses a power line protection device, including a wiring box. The wiring box has several partition plates fixed inside, which divide the interior of the wiring box into several wire-clamping slots. Each wire-clamping slot is fitted with a limit block. A closing cover is provided on one side of the wiring box. Several fixing blocks are fixed on the top of the wiring box, and several fixing frames that match the fixing blocks are fixed on the bottom of the wiring box. Two adjacent wiring boxes are fitted together by the fixing blocks and fixing frames in a one-to-one correspondence.

[0004] To address the issue of protective devices failing to limit and separate individual cables, existing technologies employ junction boxes, separators, limit blocks, and closing covers to individually limit and separate the installed cables, and use fixing blocks and frames for locking. However, this approach still results in situations where high temperatures inside the distribution box cannot be detected and eliminated in time, leading to overheating and burnout of the wiring within the box, thus causing poor protection performance of the distribution box for the wiring. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a line protection device inside a flame-retardant distribution box, which is safe and reliable, has a good cooling effect, improves the protection performance of the line, and ensures the normal use of the line.

[0006] The present invention is implemented using the following scheme: a circuit protection device inside a flame-retardant distribution box, comprising a distribution box body, a box cover movably connected to the surface of the distribution box body, an inlet hole on the left side of the distribution box body and an outlet hole on the right side, a circuit fixing mechanism provided in the inner cavity of the distribution box body, and a detection and cooling mechanism provided on the left side of the inner cavity of the distribution box body; the detection and cooling mechanism includes a cooling box fixedly connected to the inside of the distribution box body, a partition plate fixedly connected to the middle of the inner cavity of the cooling box body dividing the interior of the cooling box body into a blowing slot and a detection slot, a motor provided in the inner cavity of the blowing slot, a fan blade fixedly connected to the output shaft of the motor, and a blowing hole provided on the surface of the cooling box body and on the side of the blowing slot.

[0007] Furthermore, a semiconductor cooling chip is provided on the inner side of the air blowing slot. The cold end of the semiconductor cooling chip is located inside the air blowing slot, and the hot end extends to the outside of the power distribution box. An air inlet box is provided in the inner cavity of the detection slot. One end of the air inlet box extends to the outside of the cooling box, and the other end of the air inlet box extends through the partition to the inside of the air blowing slot.

[0008] Furthermore, a movable damper is movably connected to the inner cavity of the air inlet box near the air inlet, and an arc-shaped spring piece is connected between the movable damper and the inner wall of the air inlet box on the side opposite to the air inlet; a first screen and a second screen are fixedly connected in sequence along the air outlet direction near the air outlet of the inner cavity of the air inlet box, and the diameter of the circular hole of the first screen is larger than the diameter of the circular hole of the second screen.

[0009] Furthermore, a controller is fixedly connected to the inner cavity of the detection tank, a temperature detector is provided in the inner cavity of the detection tank, the detection end of the temperature detector extends to the outside of the cooling box, the temperature detector is electrically connected to the controller, and the controller is electrically connected to the motor.

[0010] Furthermore, the line fixing mechanism includes a fixed base plate and a mounting plate. The fixed base plate is fixedly connected to the inner side of the distribution box. The mounting plate is snapped onto the surface of the fixed base plate. Several fixed bases are fixedly connected to the surface of the mounting plate. Each fixed base is provided with a movable pressure seat above it. A limit plate is fixedly connected to one end of the bottom surface of the movable pressure seat. The lower end of the limit plate is inserted into the slot on the upper side of the corresponding end of the fixed base and can slide relative to the slot. The bottom surface of the movable pressure seat and the top surface of the fixed base are both provided with clamping grooves. Rubber pads are provided in the clamping grooves.

[0011] Furthermore, a transmission plate is fixedly connected to the end face of both the fixed base and the movable pressure seat away from the limiting plate. Two screws are fixedly connected to opposite sides of the two transmission plates. The two screws have opposite thread directions and are connected to a screw cylinder. The two ends of the inner cavity of the screw cylinder are threadedly connected to the two screws respectively.

[0012] Furthermore, a fixing plate is fixedly connected to the surface of the fixing base plate, and a positioning groove is provided on the bottom surface of the mounting plate, which is adapted to the fixing plate.

[0013] Furthermore, the fixed plate has an internal slot, and guide rods are fixedly connected to both sides of the inner cavity of the slot. A pressure plate is provided between the two guide rods and is movably connected to the guide rods. A locking rod extending from the side of the fixed plate is fixedly connected to one side of the pressure plate. A locking hole is provided on the side of the positioning slot to engage with the locking rod. The middle of the other side of the pressure plate is fixedly connected to one end of an elastic element. The other end of the elastic element is fixedly connected to the inner side of the slot. The other side of the pressure plate is fixedly connected to one end of an airbag located in the middle of the elastic element. The other end of the airbag is fixedly connected to the inner side of the slot.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) When the temperature of the distribution box rises, cold air is used to cool the inside of the flame-retardant distribution box. The cooling effect is good, which improves the protection performance of the line and ensures the normal use of the line. The high temperature scene can be detected and eliminated in time, avoiding the situation of the line inside the distribution box being burned by high temperature. It is safe and reliable.

[0016] (2) The movable pressure seat is moved down to cooperate with the fixed base to clamp and fix the line, which improves the convenience of fixing; the rubber pad is set to ensure the stability of the compression and to ensure that the surface of the line is not damaged by the compression.

[0017] (3) The line fixing mechanism is easy to disassemble and assemble. When the line needs to be maintained, the mounting plate can be removed from the fixed base plate, so that the line fixed by the fixed base and the movable pressure seat can be moved out of the flame-retardant distribution box for maintenance, thus improving the convenience of maintenance.

[0018] (4) The installation of movable air dampers and screens prevents external dust from entering, thus improving the protective performance.

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through specific embodiments and related drawings. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the cooling mechanism of the present invention;

[0022] Figure 3 This is a cross-sectional view of the air inlet box of the present invention;

[0023] Figure 4 This is a schematic diagram of the circuit fixing mechanism of the present invention;

[0024] Figure 5 This is a structural schematic diagram of the fixed base plate and mounting base of the present invention;

[0025] Figure 6 This is a cross-sectional schematic diagram of the fixing plate of the present invention;

[0026] Explanation of the numbers in the diagram: 1. Distribution box; 2. Box cover; 3. Inlet hole; 4. Outlet hole; 5. Cooling detection mechanism; 51. Cooling box; 52. Partition plate; 53. Air blower; 54. Detection slot; 55. Controller; 56. Temperature detector; 57. Air inlet box; 571. Movable damper; 572. Arc spring; 573. First screen; 574. Second screen; 58. Support plate; 59. Motor; 510. Fan blade; 511. Semiconductor refrigeration 512. Air blowing hole; 6. Circuit fixing mechanism; 61. Fixed base plate; 611. Fixed plate; 6111. Empty groove; 6112. Guide rod; 6113. Pressure plate; 6114. Clamping rod; 6115. Elastic element; 6116. Airbag; 62. Mounting plate; 621. Positioning groove; 622. Clamping hole; 63. Fixed base; 64. Limiting plate; 65. Movable pressure seat; 66. Transmission plate; 67. Screw; 68. Screw barrel; 69. Rubber pad. Detailed Implementation

[0027] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] like Figures 1-6As shown, a line protection device in a flame-retardant distribution box includes a distribution box body 1, and a box cover 2 is movably connected to the surface of the distribution box body 1. The box cover 2 can be hinged to the distribution box body 1. The distribution box 1 has an inlet hole 3 on the left side and an outlet hole 4 on the right side. The inner cavity of the distribution box 1 is equipped with a line fixing mechanism 6. The inner left side of the inner cavity of the distribution box 1 is equipped with a detection and cooling mechanism 5. The detection and cooling mechanism 5 includes a cooling box 51 fixedly connected to the inner side of the distribution box 1. The inner cavity of the cooling box 51 is fixedly connected with a partition 52 that divides the interior of the cooling box 51 into an air blowing channel 53 and a detection channel 54. The inner cavity of the air blowing channel 53 is equipped with a motor 59. The inner cavity of the air blowing channel 53 is fixedly connected with a support plate 58. The motor 59 is fixedly connected to the support plate 58. The output shaft of the motor 59 is fixedly connected with a fan blade 510. The surface of the cooling box 51 and the side of the air blowing channel 53 are provided with an air blowing hole 512. When the temperature rises, the motor 59 drives the fan blades 510 to rotate and generate wind speed. The fan blades 510 blow the wind out from the air outlet 512, thereby using the wind to cool the inside of the distribution box 1 and improve the protection performance of the lines.

[0030] In this embodiment, a thermoelectric cooler 511 is disposed on the inner side of the air blowing trough 53. The cold end of the thermoelectric cooler 511 is located inside the air blowing trough, and the hot end extends to the outside of the distribution box. An air inlet box 57 is disposed in the inner cavity of the detection trough 54. One end of the air inlet box 57 extends to the outside of the cooling box 51, and the other end of the air inlet box 57 extends through the partition 52 into the interior of the air blowing trough 53. After the thermoelectric cooler 511 cools the air, the fan blades 510 blow the cold air out from the air blowing hole 512, thereby greatly improving the cooling effect.

[0031] In this embodiment, a movable damper 571 is movably connected to the inner cavity of the air inlet box 57 near the air inlet. An arc-shaped spring piece 572 is connected between the movable damper 571 and the inner wall of the air inlet box 57 on the side opposite to the air inlet. A first screen 573 and a second screen 574 are fixedly connected sequentially along the air outlet direction in the inner cavity of the air inlet box 57 near the air outlet. The diameter of the circular hole of the first screen 573 is larger than the diameter of the circular hole of the second screen 574. The motor 59 inside the air blowing duct 53 drives the fan blades 510 to rotate, generating wind speed. The pressure inside the air blowing duct 53 decreases, and the external pressure pushes the movable damper 571 to move, opening the air inlet box 57. The movable damper 571 squeezes the arc-shaped spring piece 572 to generate elasticity, thereby allowing outside air to enter the air inlet box 57. After the air passes through the first screen 573 for coarse filtration and the second screen 574 for fine filtration, the air enters the air blowing duct 53. When the motor 59 stops running, the arc-shaped spring piece 572 restores its elasticity, causing the movable damper 571 to spring back and seal the air inlet box 57, preventing outside dust from entering.

[0032] In this embodiment, a controller 55 is fixedly connected to the inner cavity of the detection slot 54, and a temperature detector 56 is installed in the inner cavity of the detection slot 54. The detection end of the temperature detector 56 extends to the outside of the cooling box 51. The temperature detector 56 is electrically connected to the controller 55, and the controller 55 is electrically connected to the motor 59. The temperature inside the distribution box 1 is detected by the temperature detector 56. When the temperature rises, the temperature detector 56 transmits a signal to the controller 55. The controller 55 starts the motor 59 to rotate, and the motor 59 drives the fan blades 510 to rotate, generating wind speed. Outside air enters the air blowing slot through the air inlet box 57. After the semiconductor cooling chip 511 cools the air, the fan blades 510 blow the cold air out from the air blowing hole 512, thereby using the cold air to cool the inside of the distribution box 1 and improving the protection performance of the circuit.

[0033] In this embodiment, the line fixing mechanism 6 includes a fixed base plate 61 and a mounting plate 62. The fixed base plate 61 is fixedly connected to the inner side of the distribution box 1. The mounting plate 62 is snapped onto the surface of the fixed base plate 61. A plurality of fixed bases 63 are fixedly connected to the surface of the mounting plate 62. Each fixed base 63 is provided with a movable pressure seat 65. A limiting plate 64 is fixedly connected to one end of the bottom surface of the movable pressure seat 65. The lower end of the limiting plate 64 is inserted into the slot on the upper side of the corresponding end of the fixed base 63 and can slide relative to the slot. Both the bottom surface of the movable pressure seat 65 and the top surface of the fixed base 63 are provided with clamping grooves. Rubber pads 69 are provided in the clamping grooves. By placing the line in the clamping groove on the top surface of the fixed base 63, the setting of the limiting plate 64 allows the movable pressure seat 65 to move down smoothly. The downward movement of the movable pressure seat 65 cooperates with the fixed base 63 to clamp and fix the line, improving the convenience of fixing. The rubber pad 69 ensures the stability of the compression and prevents the circuit surface from being damaged by compression; the fixing components consisting of the fixed base 63 and the movable pressure base 65 are arranged in an array to ensure that the circuit is neat.

[0034] In this embodiment, transmission plates 66 are fixedly connected to the end faces of both the fixed base 63 and the movable pressure seat 65 away from the limiting plate 64. Two screws 67 are fixedly connected to opposite sides of the two transmission plates 66. The threads of the two screws 67 are in opposite directions, and a screw cylinder 68 connects between the two screws 67. The two ends of the inner cavity of the screw cylinder 68 are threadedly connected to the two screws 67. By rotating the screw cylinder 68, the two screws can be controlled to move towards or away from each other, thereby pushing the movable pressure seat 65 to clamp or loosen.

[0035] In this embodiment, a fixing plate 611 is fixedly connected to the surface of the fixing base plate 61, and a positioning groove 621 is provided on the bottom surface of the mounting plate 62, which is adapted to the fixing plate 611.

[0036] In this embodiment, the fixing plate 611 has a hollow groove 6111 inside. Guide rods 6112 are fixedly connected to both sides of the inner cavity of the hollow groove 6111. A pressure plate 6113 is provided between the two guide rods 6112 and slidably connected to them. A locking rod 6114 extending from the side of the fixing plate 6111 is fixedly connected to one side of the pressure plate 6113. A locking hole 622 is provided on the side of the positioning groove 621 to engage with the locking rod 6114. The middle of the other side of the pressure plate 6113 is fixedly connected to one end of an elastic element 6115. The other end of the elastic element 6115 is fixedly connected to the inner side of the hollow groove 6111. The other side of the pressure plate 6113 is fixedly connected to one end of an airbag 6116 located in the middle of the elastic element 6115. The other end of the airbag 6116 is fixedly connected to the inner side of the hollow groove 6111. The elastic element 6115 is a coil spring. During installation, pressing the lever 6114 moves the pressure plate 6113 on the guide rod 6112. The pressure plate 6113 compresses the elastic element 6115 and the airbag 6116 to generate elastic force. At this time, the fixing plate 611 is inserted into the positioning groove 621. After releasing the lever 6114, the elastic element 6115 and the airbag 6116 return to their elastic force, causing the lever 6114 to be locked into the locking hole 622 for fixation. This facilitates the fixing of the mounting plate 62. When the circuit needs maintenance, pressing the lever 6114 separates it from the locking hole 622, and the mounting plate 62 can be removed from the surface of the fixed base plate 61. This allows the circuit fixed by the fixed base 63 and the movable pressure seat 65 to be moved out of the distribution box 1 for maintenance.

[0037] The working process of the wiring protection device inside the flame-retardant distribution box of this invention:

[0038] When in use, pressing the lever 6114 causes the pressure plate 6113 to move on the guide rod 6112. The moving pressure plate 6113 compresses the elastic element 6115 and the airbag 6116 to generate elastic force. At this time, the positioning block 611 is inserted into the positioning groove 621. After releasing the lever 6114, the elastic element 6115 and the airbag 6116 return to their elastic force, causing the lever 6114 to be inserted into the locking hole 622 for fixation, thereby facilitating the fixation of the mounting plate 62.

[0039] Then, insert the wire through the inlet hole 3, place the wire in the clamping groove on the top surface of the fixed base 63, rotate the screw 68, and through the spiral action of the screw 68 and the screw 67, drive the movable pressure seat 65 to move down and cooperate with the fixed base 63 to clamp and fix the wire, and then insert one end of the wire through the outlet hole 4.

[0040] When the distribution box 1 is working, the temperature detector 56 detects the temperature inside the distribution box 1. When the temperature rises, the temperature detector 56 transmits a signal to the controller 55. The controller 55 starts the motor 59 to rotate. The motor 59 drives the fan blade 510 to rotate and generate wind speed. The pressure inside the air duct 53 decreases. The external pressure pushes the movable baffle 571 to move and open the air inlet box 57. The movable baffle 571 squeezes the arc spring sheet 572 to generate elasticity, thereby allowing outside air to enter the air inlet box 57. After the air passes through the coarse filtration of the first screen 573 and the fine filtration of the second screen 574, the clean air enters the air duct 53. After the semiconductor cooling chip 511 cools the air, the fan blade 510 blows the cold air out from the air outlet 512, thereby using the cold air to cool the inside of the flame-retardant distribution box 1.

[0041] When the motor 59 stops running, the arc-shaped spring 572 restores its elasticity, causing the movable baffle 571 to spring back and seal the air inlet box 57. When the circuit needs maintenance, press the lever 6114 to separate it from the locking hole 622, and the mounting plate 62 can be removed from the surface of the fixed base plate 61, thereby removing the circuit fixed by the fixed base 63 and the movable pressure seat 65 from the flame-retardant distribution box 1 for maintenance.

[0042] Unless otherwise stated, if any of the technical solutions disclosed in this invention specify a numerical range, then the disclosed numerical range is a preferred numerical range. Anyone skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this invention discloses only some numerical values ​​to illustrate the technical solutions of this invention. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this invention.

[0043] If this invention discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., a connection using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is clearly impossible to use an integral molding process).

[0044] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0045] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A wiring protection device inside a flame-retardant distribution box, comprising a distribution box body, characterized in that: The distribution box is movably connected to a cover. An inlet hole is located on the left side of the distribution box, and an outlet hole is located on the right side. A wiring fixing mechanism is installed inside the distribution box, and a detection and cooling mechanism is located on the left side of the inner cavity. The detection and cooling mechanism includes a cooling box fixedly connected to the inside of the distribution box. A partition is fixedly connected to the center of the inner cavity of the cooling box, dividing the interior of the cooling box into an air-blowing trough and a detection trough. A motor is installed inside the air-blowing trough, and fan blades are fixedly connected to the output shaft of the motor. Air-blowing holes are opened on the surface of the cooling box and on the side of the air-blowing trough. A semiconductor device is installed inside the air-blowing trough. The cooling chip has its cold end located inside the air blowing channel and its hot end extending to the outside of the distribution box. An air inlet box is provided inside the detection channel, with one end extending to the outside of the cooling box and the other end extending through a partition into the inside of the air blowing channel. A movable damper is movably connected to the inner cavity of the air inlet box near the air inlet, and an arc-shaped spring is connected between the side of the movable damper away from the air inlet and the inner wall of the air inlet box. A first screen and a second screen are fixedly connected sequentially along the air outlet direction inside the inner cavity of the air inlet box, with the diameter of the holes in the first screen being larger than that in the second screen. The line fixing mechanism includes a fixed base plate and a mounting plate. The fixed base plate is fixedly connected to the inner side of the distribution box. The mounting plate is snapped onto the surface of the fixed base plate. Several fixed bases are fixedly connected to the surface of the mounting plate. Each fixed base has a movable pressure seat above it. A limit plate is fixedly connected to one end of the bottom surface of the movable pressure seat. The lower end of the limit plate is inserted into a slot on the upper side of the corresponding end of the fixed base and can slide relative to the slot. Both the bottom surface of the movable pressure seat and the top surface of the fixed base have clamping grooves, and rubber pads are placed in the clamping grooves. A fixed plate is fixedly connected to the surface of the fixed base plate, and the bottom surface of the mounting plate... A positioning groove is provided, which is adapted to a fixed plate. A hollow groove is provided inside the fixed plate. Guide rods are fixedly connected to both sides of the inner cavity of the hollow groove. A pressure plate is provided between the two guide rods and is movably connected to the guide rods. A locking rod extending from the side of the fixed plate is fixedly connected to one side of the pressure plate. A locking hole is provided on the side of the positioning groove to engage with the locking rod. The middle of the other side of the pressure plate is fixedly connected to one end of an elastic element. The other end of the elastic element is fixedly connected to the inner side of the hollow groove. The other side of the pressure plate is fixedly connected to one end of an airbag located in the middle of the elastic element. The other end of the airbag is fixedly connected to the inner side of the hollow groove.

2. The wiring protection device inside the flame-retardant distribution box according to claim 1, characterized in that: The inner cavity of the detection tank is fixedly connected to a controller, and the inner cavity of the detection tank is equipped with a temperature detector. The detection end of the temperature detector extends to the outside of the cooling box. The temperature detector is electrically connected to the controller, and the controller is electrically connected to the motor.

3. The wiring protection device inside the flame-retardant distribution box according to claim 1, characterized in that: A transmission plate is fixedly connected to the end face of both the fixed base and the movable pressure seat away from the limiting plate. Two screws are fixedly connected to opposite sides of the two transmission plates. The two screws have opposite thread directions and are connected to a screw cylinder. The two ends of the inner cavity of the screw cylinder are threaded to the two screws respectively.

Images