Electric power control box capable of being disassembled quickly

Abstract

The invention discloses a power control box capable of being quickly disassembled, and relates to the technical field of power control boxes, the power control box comprises a box body and a cover plate, two clamping grooves are symmetrically formed in the front faces of the two side walls of the box body, two self-locking limiting assemblies are symmetrically arranged on the back face of the cover plate, and the two self-locking limiting assemblies can be clamped with the two clamping grooves in the adjacent side respectively. The box body is provided with an open fire protection assembly which is used for detecting open fire and can be automatically powered off. Two rotating rods are slightly rotated through a cross-shaped end face, and under the cooperation of a first bevel gear, a second bevel gear and a circular gear, clamping blocks can be correspondingly displaced through traction of a steel wire rope, so that the clamping blocks on the cover plate can be separated from clamping grooves in the box body, a plurality of screws do not need to be disassembled, and the operation is convenient. The cover plate of the electric power control box can be quickly disassembled by rotating the rotating shaft, so that the maintenance convenience can be improved, secondary hidden dangers caused by shell breakage due to violent disassembly are avoided, and the requirement of high-frequency disassembly and assembly is not afraid.

Description

Technical Field

[0001] The present invention relates to the technical field of power control boxes, and specifically provides a power control box that can be quickly disassembled. Background Art

[0002] Power control boxes are core components of household and industrial power systems, responsible for safely distributing, protecting, and controlling the flow of electrical energy. They usually integrate key components such as air switches, leakage protectors, and fuses, and can automatically cut off the circuit in case of short circuits, overloads, or leakage to ensure electrical safety. Their outer shells are designed with flame-retardant materials, and the internal wiring layout is clear and orderly, meeting both functional requirements and aesthetics. As the "invisible guardians" of the power system, they achieve stable power supply through the cooperation of precise components.

[0003] However, household power control boxes still have the following deficiencies during use:

[0004] 1. Currently, the volume of household power control boxes is relatively small, and the operating space on them is also small. The cover plates on the control boxes are usually fixed to the box body using screws, and multiple tools are required to open the cover plates. The disassembly and assembly of the cover plates are rather troublesome. When sudden faults such as overloads and short circuits occur in the circuit, other factors may cause the screws to not be quickly removed during the process of turning the screws, which will delay the repair opportunity.

[0005] 2. Existing power control boxes do not have the function of detecting open flames and automatically cutting off the power. When the insulation of the circuit is damaged and the live wire comes into direct contact with the neutral wire, a large current will generate a high-temperature electric arc instantaneously, which will ignite surrounding plastic components or accumulated dust to form an open flame, and the fire will quickly spread to the entire power distribution system, causing a fire, thus posing a safety hazard in people's daily lives.

[0006] Therefore, we propose a power control box that can be quickly disassembled to solve the problems raised above. Summary of the Invention

[0007] The purpose of the present invention is to provide a power control box that can be quickly disassembled. The cover plate and the power control box can be quickly disassembled and assembled, and the operation is convenient, not afraid of high-frequency disassembly and assembly requirements. And inside the power control box, the detection of open flame can be completed without manual intervention, and the main power supply and the load circuit can be disconnected in time to avoid the risk of the spread of electrical fires, solving the problems raised in the above background art.

[0008] To achieve the above object, the present invention provides the following technical solution: A power control box that can be quickly disassembled, including a box body and a cover plate. On the front of both side walls of the box body, two card slots are symmetrically opened. On the back of the cover plate, two self-locking limit components are symmetrically arranged. The two self-locking limit components can be respectively engaged with the two card slots on the adjacent side. On the box body, there is a fire protection component for detecting open fire and automatically cutting off power.

[0009] The self-locking limit component includes a cavity and a groove opened in the cover plate. A perforation is opened between the cavity and the groove. One surface of the cavity is rotationally connected with a rotating rod through a bearing. One end of the rotating rod passes through the perforation and is fixed with a cross end face that can rotate in the groove. One end of the rotating rod is sleeved and fixed with a turntable. A toothed self-locking groove is opened on one surface of the turntable.

[0010] The fire protection component includes a small infrared flame detector, an AC contactor, and a relay. An isolation plate is fixed inside the box body. The isolation plate divides the internal space of the box body into an installation cavity for power components and an isolation cavity.

[0011] Preferably, the self-locking limit component further includes two sliding rods symmetrically fixed at the top of the groove. A moving plate is sleeved on the surfaces of the two sliding rods. A connecting rod is fixed to the bottom of the moving plate. A wedge block is fixed to one surface of the bottom end of the connecting rod. The wedge block is slidably connected in the toothed self-locking groove. Self-locking springs are sleeved on the surfaces of the two sliding rods. Limit plates are fixed to the bottom ends of the two sliding rods. The top and bottom ends of the two self-locking springs are respectively fixed to the bottom of the moving plate and the top of the adjacent limit plate.

[0012] Preferably, the self-locking limit component further includes two movable slots symmetrically opened on the back of the cover plate. Two guide rods are symmetrically fixed between the top and bottom of the two movable slots. Two corresponding blocks are slidably arranged on the surfaces of the two guide rods. The two blocks are symmetrically arranged.

[0013] Preferably, return springs are sleeved on the surfaces of the four guide rods. The two ends of the four return springs are respectively fixed to the adjacent block and one surface of the movable slot. One end of each of the two blocks passes through the adjacent movable slot and is engaged with the corresponding card slot. The block and the card slot are both set to be adapted "L" shapes.

[0014] Preferably, a steel wire rope is fixed to one surface of each of the two blocks. The steel wire ropes are fixed in the middle of the two adjacent return springs. A wire groove communicating with each other is opened between the two movable slots. Two round rods are rotatably connected in the wire groove. One end of each of the two round rods is rotationally connected with one surface of the wire groove through a bearing.

[0015] Preferably, the other ends of the two round rods both pass through the wire groove and enter the cavity, and are both sleeved and fixed with circular gears. The steel wire ropes are both movable in the wire groove. One ends of the two steel wire ropes are respectively wound and fixed on the surfaces of one ends of the corresponding round rods, and the two circular gears are meshed in the cavity.

[0016] Preferably, a first bevel gear and a second bevel gear are arranged in the cavity. The first bevel gear is sleeved and fixed on the surface of the rotating rod, and the second bevel gear is sleeved and fixed on one end of one of the round rods. The first bevel gear and the second bevel gear are meshed.

[0017] Preferably, two semi-circular grooves are formed in the wire groove, and the two round rods and the steel wire ropes are respectively movable in the corresponding semi-circular grooves.

[0018] Preferably, the open fire protection component further includes a transparent observation window opened on the partition board. The AC contactor is fixed in the installation cavity, and the small infrared flame detector is fixed on the top of the isolation cavity. The small infrared flame detector can monitor the installation cavity through the transparent observation window.

[0019] Preferably, the relay is fixed on one side wall of the isolation cavity. The small infrared flame detector is electrically connected to the relay, and the relay is electrically connected to the AC contactor.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. In the present invention, by slightly rotating the two rotating rods through the cross end faces, under the cooperation of the first bevel gear, the second bevel gear and the circular gear, the steel wire ropes can be used to traction the corresponding displacement of the latch, so that the latch on the cover plate can be disengaged from the card slot on the box body. Without disassembling a plurality of screws, the cover plate of the power control box can be quickly disassembled, which can improve the maintenance convenience, and at the same time avoid the secondary hidden danger caused by the violent disassembly resulting in the rupture of the shell, and is not afraid of the high-frequency disassembly and assembly requirements.

[0022] 2. In the present invention, by setting the wedge block, the self-locking spring, the connecting rod and the tooth-shaped self-locking groove, the shapes of the wedge block and the tooth-shaped self-locking groove are adapted to each other. That is, when it is necessary to rotate the rotating rod to disassemble the cover plate, the rotated rotating rod can be locked. The rotating rod can maintain the locked state, which can avoid the reset rotation of the rotating rod caused by the reset spring, that is, the displacement of the latch is locked, so that the personnel can smoothly disassemble the cover plate. Under the influence of the function of the reset spring, the personnel only need to push the moving plate to release the engagement between the wedge block and the tooth-shaped self-locking groove, and the locking of the rotating rod can be released. The reset spring can push the latch to quickly reset and move, so the installation of the cover plate and the power control box is also convenient, thus making it more convenient for the personnel to disassemble and assemble the cover plate.

[0023] 3. In the present invention, the small infrared flame detector can be sensitive to flame response and has strong anti-interference ability. It can detect incipient open fire in the power control box in time and alarm in time to interfere. The linkage control circuit can trigger the relay in an extremely short time, so that the power supply of the AC contactor is cut off, and the connection between the main power supply and the load circuit is disconnected. The whole process of detection, alarm and power-off can be completed without manual intervention, avoiding the expansion of the fire and causing serious home fires, and significantly reducing the risk of electrical fire spread. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional view of the overall structure in a quickly detachable power control box of the present invention;

[0025] Figure 2 It is a three-dimensional view of the internal structure of the box body in a quickly detachable power control box of the present invention;

[0026] Figure 3 It is a three-dimensional view of the cut-open slot structure on one side wall of the box body in a quickly detachable power control box of the present invention;

[0027] Figure 4 It is a three-dimensional view of the partially cut-open cavity and groove structures of the cover plate in a quickly detachable power control box of the present invention;

[0028] Figure 5 It is a three-dimensional view of the enlarged structure at A in a quickly detachable power control box of the present invention;

[0029] Figure 6 It is a three-dimensional view of the enlarged partial structure of the self-locking limit component in a quickly detachable power control box of the present invention;

[0030] Figure 7 It is an exploded three-dimensional view of the turntable, wedge block and moving plate in a quickly detachable power control box of the present invention.

[0031] Figure 8 It is a three-dimensional view of the partially cut-open movable slot and wire slot structures of the cover plate in a quickly detachable power control box of the present invention;

[0032] Figure 9 It is a three-dimensional view of the enlarged structure at B in a quickly detachable power control box of the present invention;

[0033] Figure 10 It is a three-dimensional view of the enlarged structure at C in a quickly detachable power control box of the present invention.

[0034] In the figure: 1. Box body; 2. Cover plate; 3. Card slot; 4. Self-locking limit component; 401. Cavity; 402. Groove; 403. Rotating rod; 404. Cross end face; 405. Turntable; 406. Tooth-shaped self-locking groove; 407. Slide bar; 408. Moving plate; 409. Connecting rod; 410. Wedge block; 411. Self-locking spring; 412. Activity slot; 413. Guide rod; 414. Block; 415. Reset spring; 416. Steel wire rope; 417. Wire groove; 418. Round rod; 419. Circular gear; 420. First bevel gear; 421. Second bevel gear; 422. Semi-circular groove; 5. Open fire protection component; 501. Small infrared flame detector; 502. AC contactor; 503. Relay; 504. Isolation plate; 505. Installation cavity; 506. Isolation cavity; 507. Transparent observation window. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to the attached Figure 1 - attached Figure 10 As shown in the figure, the present invention provides a technical solution: a power control box that can be quickly disassembled, including a box body 1 and a cover plate 2. Two card slots 3 are symmetrically opened on the front of both side walls of the box body 1. Two self-locking limit components 4 are symmetrically arranged on the back of the cover plate 2. The two self-locking limit components 4 can be respectively engaged with two adjacent card slots 3 on one side. An open fire protection component 5 for detecting open fire and automatically cutting off power is arranged on the box body 1.

[0037] Example 1, according to Figures 4 - 7As shown in the figure, the self-locking limit component 4 includes a cavity 401 and a groove 402 formed in the cover plate 2. A perforation is formed between the cavity 401 and the groove 402. One surface of the cavity 401 is rotatably connected to a rotating rod 403 through a bearing. One end of the rotating rod 403 passes through the perforation and is fixed with a cross end face 404 that can rotate in the groove 402. A turntable 405 is sleeved and fixed at one end of the rotating rod 403. A toothed self-locking groove 406 is formed on one surface of the turntable 405. The self-locking limit component 4 further includes two sliding rods 407 symmetrically fixed at the top of the groove 402. A moving plate 408 is sleeved on the surfaces of the two sliding rods 407. A connecting rod 409 is fixed to the bottom of the moving plate 408. A wedge block 410 is fixed to one surface of the bottom end of the connecting rod 409. The wedge block 410 is slidably connected in the toothed self-locking groove 406. Self-locking springs 411 are sleeved on the surfaces of the two sliding rods 407. Limit plates are fixed at the bottom ends of the two sliding rods 407. The top ends and the bottom ends of the two self-locking springs 411 are respectively fixed to the bottom of the moving plate 408 and the top of the adjacent limit plate.

[0038] The effect achieved by the entire Embodiment 1 is as follows: With the shape matching between the toothed self-locking groove 406 and the wedge block 410, the rotation direction of the rotating rod 403 can be restricted. When the rotating rod 403 is rotated, the round rod 418 can smoothly wind and reel the steel wire rope 416, so that the rotating rod 403 can be effectively rotated. And when the cover plate 2 is disassembled, the rotated rotating rod 403 can be locked to prevent the rotating rod 403 rotating in the cavity 401 due to the bearing from easily resetting and rotating when no force is applied by the personnel, so that the personnel can smoothly and quickly disassemble the cover plate 2 for corresponding maintenance work. Moreover, with the cooperation of the sliding rod 407 and the self-locking spring 411, while maintaining the rotating function of the rotating rod 403, a locking function can be achieved, and thus there are various practical effects.

[0039] Embodiment 2, according to Figures 6 - 10As shown in the figure, the self-locking limit component 4 further includes two movable slots 412 symmetrically formed on the back surface of the cover plate 2. Between the top and bottom of the two movable slots 412, two guide rods 413 are symmetrically fixed. On the surfaces of the two corresponding guide rods 413, sliders 414 are slidably arranged. The two sliders 414 are symmetrically arranged. On the surfaces of the four guide rods 413, return springs 415 are sleeved. The two ends of the four return springs 415 are respectively fixed to the adjacent slider 414 and one surface of the movable slot 412. One ends of the two sliders 414 respectively pass through the adjacent movable slot 412 and are engaged with the corresponding card slots 3. The sliders 414 and the card slots 3 are both arranged in a matching "L" shape. On one surface of the two sliders 414, steel wire ropes 416 are fixed. The steel wire ropes 416 are fixed in the middle of the adjacent two return springs 415. A communication wire slot 417 is formed between the two movable slots 412. In the wire slot 417, two round rods 418 are respectively rotatably connected. One ends of the two round rods 418 are rotatably connected to one surface of the wire slot 417 by bearings. The other ends of the two round rods 418 respectively pass through the wire slot 417 and enter the cavity 401, and are both sleeved and fixed with circular gears 419. The steel wire ropes 416 are both movably arranged in the wire slot 417. One ends of the two steel wire ropes 416 are respectively wound and fixed on the surface of one end of the corresponding round rod 418. The two circular gears 419 are meshed in the cavity 401. In the cavity 401, a first bevel gear 420 and a second bevel gear 421 are arranged. The first bevel gear 420 is sleeved and fixed on the surface of the rotating rod 403. The second bevel gear 421 is sleeved and fixed on one end of one of the round rods 418. The first bevel gear 420 and the second bevel gear 421 are meshed. Two semi-circular slots 422 are formed on the wire slot 417. The two round rods 418 and the steel wire ropes 416 are respectively movably arranged in the corresponding semi-circular slots 422.

[0040] The effects achieved by the entire Embodiment 2 are as follows: The guide rod 413 can guide the latch 414, enabling the latch 414 to only move up and down. When the return spring 415 pushes the moving plate 408 downward, the wedge 410 disengages from the toothed area of the toothed self-locking groove 406, releasing the lock on the rotating rod 403. The compressed return spring 415 can quickly drive the corresponding movement of the latch 414 under its elastic potential energy. When the latch 414 engages with the card slot 3, the installation of the cover plate 2 can be completed. At this time, the steel wire rope 416 on the latch 414 can be pulled, causing the round rod 418 to rotate correspondingly to unwind the steel wire rope 416, and the rotating rod 403 also rotates correspondingly. When the operations of the latch 414 and the rotating rod 403 stop, the force applied to the moving plate 408 is released, and the compressed self-locking spring 411 can push the moving plate 408 back to its original position. The moving plate 408 can drive the wedge 410 to reset and move upward through the connecting rod 409. The wedge 410 engages with the toothed area of the toothed self-locking groove 406 again, locking the rotating rod 403 again. Both the latch 414 and the card slot 3 are set to be adapted "L" shapes to effectively install the cover plate 2 on the box body 1. The steel wire ropes 416 are fixed between two adjacent return springs 415, that is, between two guide rods 413, so that the pulling force of the steel wire ropes 416 can smoothly pull the latch 414 for corresponding displacement. The round rod 418 is located in the wire groove 417, enabling the round rod 418 to directly wind and unwind the steel wire rope 416. The semi-circular groove 422 is to cooperate with the winding thickness of the steel wire rope 416 to enable the round rod 418 to smoothly wind the appropriate length of the steel wire rope 416.

[0041] Embodiment 3, according to Figure 2 and Figure 3 As shown, the open fire protection component 5 includes a small infrared type flame detector 501, an AC contactor 502, and a relay 503. A partition plate 504 is fixed inside the box body 1. The partition plate 504 divides the internal space of the box body 1 into an installation cavity 505 for electrical components and an isolation cavity 506. The open fire protection component 5 further includes a transparent observation window 507 opened on the partition plate 504. The AC contactor 502 is fixed in the installation cavity 505. The small infrared type flame detector 501 is fixed on the top of the isolation cavity 506. The small infrared type flame detector 501 can monitor the installation cavity 505 through the transparent observation window 507. The relay 503 is fixed on one side wall of the isolation cavity 506. The small infrared type flame detector 501 is electrically connected to the relay 503, and the relay 503 is electrically connected to the AC contactor 502.

[0042] The effect achieved by the entire Embodiment 3 is as follows: The isolation board 504 is used to electrically isolate the small infrared flame detector 501 from other components, reducing electromagnetic interference. The small infrared flame detector 501 can monitor in real time whether there is an open fire in the installation cavity 505 through the transparent observation window 507. When an open fire appears in the initial stage, the relay 503 is promptly disconnected, causing the AC contactor 502 to disconnect between the main power supply and the load circuit, avoiding greater damage caused by the continuous flow of electricity during an electrical fire.

[0043] The working principle of the entire device is as follows: When it is necessary to install power components such as an air switch in the power control box, after the personnel install these components in the installation cavity 505, and the power circuit is connected to each component such as the air switch, the current output terminals of each component such as the air switch are connected to the main contacts of the AC contactor 502 according to categories. The load line is led out from the other end of the AC contactor 502. The alarm output terminal of the small infrared flame detector 501 is serially connected to the input terminal of the relay 503. The coil power supply terminal of the AC contactor 502 is connected to the output circuit of the relay 503. Moreover, the small infrared flame detector 501 and the relay 503 are independently powered. The transparent observation window 507 needs to use a special material with high infrared transmittance, such as quartz glass or coated glass, to ensure that the infrared wavelength of the open fire flame can effectively penetrate the glass of the transparent observation window 507 and be detected by the small infrared flame detector 501 in the isolation cavity 506.

[0044] When an open fire flame appears in the installation cavity 505, by detecting the infrared spectral characteristics of the flame, the light intensity is converted into a level change. For example, a high-level signal is output when the flame exists. The signal intensity is compared with a preset threshold. If it exceeds the threshold, it is determined as an open fire. By adjusting the dynamic threshold or analyzing multi-band signals, the flame signal is distinguished from the interference source. After detecting an effective flame signal, a switch quantity signal is output to disconnect the circuit in the relay 503. After the relay 503 disconnects the circuit path with the AC contactor 502, there is no current passing through the electromagnetic coil of the AC contactor 502, so the electromagnetic coil will not generate an alternating magnetic field, the magnetic field disappears, the spring force pushes the armature to reset, disengaging from the static iron core, and the armature drives the main contacts and auxiliary contacts to return to their original states. The main contacts are disconnected, and the path between the power supply and the load circuit is disconnected, so the load is powered off and stops running. It can cut off the power supply in the power supply and load circuits in a timely manner at the initial stage of the formation of an open fire, avoiding the spread of an electrical fire.

[0045] After the AC contactor 502 is powered off, manual power-on is required. When the control circuit is powered on, the internal coil of the AC contactor 502 is energized, and current flows through the electromagnetic coil of the AC contactor 502, generating an alternating magnetic field. The magnetic force attracts the armature to overcome the spring resistance and move towards the static iron core. The armature drives the contact bracket, causing the main contacts to close and the auxiliary contacts to switch synchronously. After the main contacts are closed, the main circuit is connected, and the load can then be powered on and operate normally;

[0046] After the personnel install the components in the box body 1, the personnel first fix the box body 1 to the wall, and then the personnel snap the cover plate 2 to the front of the box body 1. At this time, the four clamping blocks 414 on the cover plate 2 will be inserted into the corresponding card slots 3. The clamping blocks 414 pulled by the steel wire rope 416 squeeze the return spring 415, which can lock the moving function of the clamping blocks 414. The clamping blocks 414 are not engaged with the card slots 3. Then the personnel use a suitable tool to push the moving plate 408, so that the moving plate 408 moves downward on the two sliding rods 407, and the self-locking spring 411 is squeezed. Under the connection action of the connecting rod 409, it can drive the wedge block 410 to move downward together until the wedge block 410 moves down to disengage from the toothed area of the tooth-shaped self-locking groove 406. At this time, the restriction of the wedge block 410 on the rotation direction of the turntable 405 can be released, and the round rod 418 can rotate arbitrarily. Under the thrust of the return spring 415, the clamping block 414 can move back, the steel wire rope 416 is pulled, and the winding length with the round rod 418 is reduced. At this time, the round rod 418 is pulled to rotate clockwise, and the steel wire rope 416 wound around the round rod 418 is relaxed, so that the clamping block 414 moves correspondingly and engages with the card slot 3. Under the L-shaped cooperation of the clamping block 414 and the card slot 3, the snap-on installation of the cover plate 2 can be completed;

[0047] During the long-term use of the box body 1, when personnel need to remove the lower cover plate 2 for corresponding maintenance, with the shape fit between the toothed self-locking groove 406 and the wedge block 410, one side of the wedge block 410 is a plane and the other side is an arc surface. The plane side of the wedge block 410 can contact the plane of the toothed area of the toothed self-locking groove 406, which can block the reverse rotation of the turntable 405. The arc surface of the wedge block 410 can contact the inclined surface of the toothed area of the toothed self-locking groove 406, enabling the arc surface of the wedge block 410 to slide on the inclined surface of the toothed self-locking groove 406. In this way, the turntable 405 can only rotate counterclockwise, and personnel can only rotate the rotating rod 403 counterclockwise. Thus, only a screwdriver is needed to rotate the cross end face 404 counterclockwise to drive the rotating rod 403 and the turntable 405 thereon to rotate counterclockwise together. The counterclockwise rotation of the rotating rod 403 can drive the first bevel gear 420 to rotate counterclockwise together, and the first bevel gear 420 can drive the second bevel gear 421 to rotate counterclockwise together. At this time, the second bevel gear 421 can drive one of the round rods 418 and the circular gear 419 thereon to rotate counterclockwise together. Under the meshing cooperation of the other circular gear 419, it can drive the other circular gear 419 and the other round rod 418 to rotate in the opposite direction, clockwise. Then, the two round rods 418 can rotate in opposite directions. At this time, the two round rods 418 can respectively wind the steel wire ropes 416 wound and fixed thereon, increasing the length of the steel wire ropes 416 wound on the round rods 418. Then, the length of the steel wire ropes 416 in the wire grooves 417 gradually becomes shorter. At this time, the traction force of the steel wire ropes 416 can overcome the resistance of the return spring 415, causing the return spring 415 to be compressed, driving the block 414 to displace correspondingly on the two guide rods 413. The other end of the block 414 gradually moves correspondingly in the card slot 3, and can gradually disengage from the engagement with the card slot 3 until the block 414 moves to the maximum limit and completely disengages from the engagement state of the card slot 3. At this time, the rotation of the rotating rod 403 cannot continue, and the force applied to the rotating rod 403 is released. During the rotation of the rotating rod 403, due to the shape fit between the toothed self-locking groove 406 and the wedge block 410, the wedge block 410 automatically moves up and down in cooperation within the toothed self-locking groove 406. At this time, the self-locking spring 411 is in the process of being repeatedly pulled and contracted and reset. When the rotation of the rotating rod 403 stops, under the action of the self-locking spring 411, the wedge block 410 just snaps into the toothed area rotated by the toothed self-locking groove 406, so as to lock the rotating rod 403 by limiting the turntable 405, avoiding the return rotation of the round rod 418 and the rotating rod 403 driven by the return spring 415 after personnel stop rotating the rotating rod 403, thus having a self-locking function. Personnel can then smoothly pull out the cover plate 2 from the box body 1, and the disassembly and assembly of the cover plate 2 can be completed.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A quickly detachable power control box, characterized in that: The invention comprises a box body (1) and a cover plate (2), wherein two card slots (3) are symmetrically provided on the front of both side walls of the box body (1), and two self-locking limit assemblies (4) are symmetrically provided on the back of the cover plate (2), and the two self-locking limit assemblies (4) can respectively engage with the two card slots (3) on the adjacent side, and the box body (1) is provided with an open flame protection assembly (5) for detecting open flames and automatically cutting off power; The self-locking limit assembly (4) comprises a cavity (401) and a groove (402) provided in the cover plate (2); a through-hole is provided between the cavity (401) and the groove (402); a rotating rod (403) is rotatably connected to one surface of the cavity (401) via a bearing; one end of the rotating rod (403) passes through the through-hole and is fixed with a cross end face (404) rotatable in the groove (402); a rotating disk (405) is sleeved and fixed to one end of the rotating rod (403); and a tooth-shaped self-locking groove (406) is provided on one surface of the rotating disk (405); The open flame protection assembly (5) comprises a small infrared flame detector (501), an AC contactor (502) and a relay (503); an isolation plate (504) is fixed inside the box body (1); the isolation plate (504) divides the internal space of the box body (1) into a mounting cavity (505) for power components and an isolation cavity (506).

2. The quick-detachable power control box according to claim 1, wherein: The self-locking limit assembly (4) also includes two sliding rods (407) symmetrically fixed on the top of the groove (402), the surfaces of the two sliding rods (407) are provided with a movable plate (408), the bottom of the movable plate (408) is fixed with a connecting rod (409), a wedge block (410) is fixed on a surface of the bottom end of the connecting rod (409), and the wedge block (410) is slidably connected in the tooth-shaped self-locking groove (406), the surfaces of the two sliding rods (407) are both provided with a self-locking spring (411), the bottom ends of the two sliding rods (407) are both fixed with a limit plate, and the top and bottom ends of the two self-locking springs (411) are respectively fixed to the bottom of the movable plate (408) and the top of the adjacent limit plate.

3. The quickly detachable power control box according to claim 1, characterized in that: The self-locking limit assembly (4) further comprises two movable grooves (412) symmetrically arranged on the back of the cover plate (2), two guide rods (413) are symmetrically fixed between the top and bottom of the two movable grooves (412), and two clamping blocks (414) are slidably provided on the surfaces of the two corresponding guide rods (413), and the two clamping blocks (414) are symmetrically arranged.

4. The quickly detachable power control box according to claim 3, characterized in that: The surfaces of the four guide rods (413) are sleeved with return springs (415), and the two ends of the four return springs (415) are respectively fixed to the adjacent clamping blocks (414) and one surface of the movable groove (412). One end of two clamping blocks (414) respectively passes through the adjacent movable groove (412) and is engaged with the corresponding clamping groove (3). The clamping blocks (414) and the clamping groove (3) are both arranged in a matching "L" shape.

5. The quickly detachable power control box according to claim 4, characterized in that: One surface of each of the two clamping blocks (414) is fixedly provided with a steel wire rope (416), and the steel wire ropes (416) are fixed in the middle of two adjacent return springs (415). A wire groove (417) communicating with each other is formed between the two movable grooves (412). Two round rods (418) are rotatably connected in the wire groove (417), and one end of each of the two round rods (418) is rotatably connected to a surface of the wire groove (417) by a bearing.

6. The quickly detachable power control box according to claim 5, characterized in that: The other ends of the two round rods (418) penetrate through the wire groove (417) and enter the cavity (401), and are respectively sleeved and fixed with circular gears (419). The steel wire ropes (416) are all movable in the wire groove (417). One ends of the two steel wire ropes (416) are respectively wound and fixed on the surface of one end of the corresponding round rod (418). The two circular gears (419) are meshed in the cavity (401).

7. The quickly detachable power control box according to claim 6, characterized in that: A first bevel gear (420) and a second bevel gear (421) are arranged in the cavity (401). The first bevel gear (420) is sleeved and fixed on the surface of the rotating rod (403). The second bevel gear (421) is sleeved and fixed on one end of one of the round rods (418). The first bevel gear (420) and the second bevel gear (421) are meshed.

8. The quickly detachable power control box according to claim 5, characterized in that: Two semi-circular grooves (422) are formed in the wire groove (417), and the two round rods (418) and the steel wire ropes (416) are respectively movable in the corresponding semi-circular grooves (422).

9. The quickly detachable power control box according to claim 1, characterized in that: The open fire protection assembly (5) further includes a transparent observation window (507) formed in the isolation plate (504). The AC contactor (502) is fixed in the installation cavity (505). The small infrared flame detector (501) is fixed on the top of the isolation cavity (506). The small infrared flame detector (501) can monitor the interior of the installation cavity (505) through the transparent observation window (507).

10. A quickly detachable power control box according to claim 9, characterized in that: The relay (503) is fixed on one side wall of the isolation cavity (506). The small infrared flame detector (501) is electrically connected to the relay (503), and the relay (503) is electrically connected to the AC contactor (502).

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