Safety power distribution cabinet for power system

Abstract

The invention relates to the technical field of power distribution cabinets, and discloses a power system safety type power distribution cabinet which comprises a power distribution cabinet body, a control switch is installed in the power distribution cabinet body, the control switch is provided with a wire plugging hole allowing the end of a wire to be inserted, and the power distribution cabinet further comprises an installation box which is installed in the power distribution cabinet body and designed to be attached to the wire plugging hole in the control switch. An embedding groove for wiring of a wire is formed in the mounting box; the top cover is detachably mounted at the opening in the upper part of the mounting box, and a closed space wrapping the wire plugging hole is formed among the top cover, the mounting box and the control switch; and the fire extinguishing assembly is mounted in the mounting box, and when the temperature in the sealed space exceeds a preset value, the fire extinguishing assembly sprays an insulating substance to the wire inserting hole. The detachable top cover is tightly matched with the mounting box, a closed space is formed at the wire plugging hole of the control switch, environmental factors such as moisture and oxygen are isolated, and fire disasters caused by electric leakage or short circuit at exposed positions of wires are prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution cabinets, and specifically to a safe distribution cabinet for power systems. Background Art

[0002] As an important device for distributing electric energy in power systems, distribution cabinets are widely used in industrial, commercial, and civil buildings.

[0003] Currently, when wiring a distribution cabinet, generally, the insulating skin at the end of the wire is stripped off, and then it is inserted into the hole of the switch terminal and tightened with bolts for fixed connection. Although it is convenient for connection, this will directly expose some of the wire at the wire port to the air, and the wiring part of the wiring terminal will also be exposed to the air. In this way, the first part of the insulating layer to age should be this position. Especially in a humid environment, when the current is too large, this position is more likely to have high temperature or even catch fire compared to other positions, thus causing potential safety hazards. Summary of the Invention

[0004] The purpose of the present invention is to provide a safe distribution cabinet for power systems to solve at least one of the technical problems existing in the above-mentioned prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A safe distribution cabinet for power systems, including a distribution cabinet, a control switch is installed in the distribution cabinet, and the control switch has an insertion hole for the end of the wire conductor to be inserted. It further includes:

[0006] An installation box installed in the distribution cabinet and designed to fit the insertion hole on the control switch, and an embedding groove for the wire to pass through is provided in the installation box;

[0007] A top cover detachably installed at the upper opening of the installation box, and a sealed space that wraps the insertion hole is formed among the top cover, the installation box, and the control switch;

[0008] A fire extinguishing component installed in the installation box. When the temperature in the sealed space exceeds a preset value, the fire extinguishing component sprays an insulating substance towards the insertion hole and wraps and covers the insertion hole and the exposed part of the wire.

[0009] Optionally, the fire extinguishing component includes a sliding frame slidably mounted on the inner wall of the installation box. An elevating plate is slidably mounted on the inner wall of the sliding frame. A swing rod is rotatably connected between the elevating plate and the inner wall of the installation box. A torsion spring is installed at the connection between the swing rod and the installation box, and the torsion spring applies a torsional force to the swing rod to rotate away from the wire insertion hole. A fixed cylinder is fixed to the inner wall of the installation box away from the control switch. A piston cylinder is slidably mounted in the fixed cylinder. A piston rod is slidably mounted on the inner wall of the piston cylinder through a piston plate. One end of the piston rod penetrates and is fixed to the outer wall of the sliding frame close to the control switch. A discharge channel is formed inside the piston rod. A second plug is embedded at the position of the outlet of the discharge channel. An air vent hole is provided on the second plug. A through groove through which the fixed cylinder can pass is formed on the outer wall of the sliding frame close to the control switch. The piston cylinder is filled with a flowing insulating substance;

[0010] The fire extinguishing component further includes a locking part, and the locking part is used to lock the position of the sliding frame and release the lock on the sliding frame after the temperature in the installation box exceeds a preset value.

[0011] Optionally, the locking part includes a groove formed on the outer wall of the top cover. A locking hook is rotatably mounted on the inner wall of the groove. One end of the locking hook is provided as a hook. A bimetallic strip is also mounted on the inner wall of the groove, and the bimetallic strip contacts and abuts against the end of the locking hook away from the hook.

[0012] Optionally, a partition layer and a diaphragm perpendicular to the partition layer are fixed to the inner wall of the piston cylinder. The partition layer and the diaphragm divide the interior of the piston cylinder into two sealed and mutually isolated storage cavities. Epoxy resin and curing agent are respectively stored in the two storage cavities;

[0013] Fine holes are also formed inside the piston rod. A first plug is embedded at the outlet position of the fine holes. One end of the first plug is connected with an inserting wire. The inserting wire penetrates into the partition layer and alternately penetrates into the storage cavities on both sides of the partition layer. The partition layer is made of paraffin material.

[0014] Optionally, an expansion cavity is formed between the side of the fixed cylinder away from the piston rod and the inner wall of the piston cylinder. The expansion cavity is communicated with the space above the elevating plate through a connecting pipe. An air vent hole is also formed on the outer wall of the sliding frame above the elevating plate. A one-way tooth is provided on the outer wall of the piston cylinder, and the one-way tooth is designed at a right angle.

[0015] Optionally, a detachable base is installed at the bottom of the installation box. The embedding groove is formed on the joint surface between the base and the installation box, and a sealing cushion layer is provided in the embedding groove.

[0016] Optionally, a slide rail is provided at the top edge of the installation box, the top cover is slidably installed with the installation box via the slide rail, and a locking block for limiting the top cover is also rotatably installed on the edge outer wall of the installation box.

[0017] Optionally, the diaphragm is configured as an integral structure, and the penetration wire passes through the diaphragm and is fixedly connected to a penetration point of the diaphragm.

[0018] Optionally, the discharge channel is configured as an oblique opening, and the opening direction is aligned with the position of the wire insertion hole.

[0019] Optionally, sealing gaskets are provided at the fitting positions of the installation box and the top cover and the control switch.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention forms a closed space at the control switch plug hole by closely matching the removable top cover with the installation box, isolating environmental factors such as moisture and oxygen, and preventing fires caused by leakage or short circuit at exposed wires. At the same time, the sealed space provides protection for emergency situations, reduces safety hazards, and enhances the safety of the distribution cabinet.

[0022] 2. The present invention is designed to install a fire extinguishing component in the box. When the temperature exceeds a preset value, the torsion spring force and air pressure change are used to spray the insulating material (such as a mixture of epoxy resin and curing agent) in the piston cylinder toward the wire plug hole through the discharge channel, quickly wrapping the exposed wires, isolating and isolating them from oxygen, suppressing the fire source, gaining time for rescue and maintenance, and improving the safety emergency response capability of the distribution cabinet.

[0023] 3. The present invention limits the scope of influence in case of failure by providing an independent installation box and fire extinguishing assembly corresponding to each control switch, thus avoiding joint failure. The detachable base, top cover and independent fire extinguishing assembly are convenient for disassembly and maintenance. When replacing the control switch, the inside of the power distribution cabinet will not be polluted, which simplifies the maintenance process and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the cross-sectional three-dimensional structure of the power distribution cabinet of the present invention;

[0025] Figure 2 It is an enlarged schematic diagram of the control switch of the present invention and its corresponding installation box;

[0026] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the installation box of the present invention;

[0027] Figure 4 It is a side view of the installation box of the present invention;

[0028] Figure 5 For the present invention Figure 4 Sectional view along AA;

[0029] Figure 6 For the present invention Figure 4 Schematic perspective sectional view along B-B in the present invention;

[0030] Figure 7 For the present invention Figure 5 Cross-sectional view along C-C in the present invention;

[0031] Figure 8 Bottom view perspective view of the base, installation box and top cover of the present invention;

[0032] Figure 9 Top view perspective view of the base, installation box and top cover of the present invention.

[0033] In the figure: 1, power distribution cabinet; 2, control switch; 3, wire insertion hole; 4, base; 5, installation box; 6, top cover; 7, sliding frame; 8, lifting plate; 9, swing rod; 10, fixed cylinder; 11, piston cylinder; 12, piston rod; 13, discharge channel; 14, first plug; 15, second plug; 16, interspersed wire; 17, partition layer; 18, diaphragm; 19, groove; 20, locking hook; 21, bimetallic strip; 22, air vent hole; 23, connecting pipe; 24, expansion cavity; 25, one-way tooth; 26, locking block; 27, electric wire; 28, slide rail. Detailed implementation manners

[0034] 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 of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1 to 9 , the present invention provides a technical solution: a safety type power distribution cabinet for a power system, including a power distribution cabinet 1, a control switch 2 is installed in the power distribution cabinet 1, and the control switch 2 has a wire insertion hole 3 into which the end of the electric wire 27 can be inserted. It further includes:

[0036] An installation box 5 installed in the power distribution cabinet 1 and designed to fit at the wire insertion hole 3 on the control switch 2, and an embedding groove for the electric wire 27 to pass through is provided in the installation box 5;

[0037] A top cover 6 detachably installed at the upper opening of the installation box 5, and a sealed space that wraps the wire insertion hole 3 is formed among the top cover 6, the installation box 5 and the control switch 2;

[0038] A fire extinguishing component installed in the installation box 5. When the temperature in the sealed space exceeds a preset value, the fire extinguishing component sprays an insulating substance towards the wire insertion hole 3 and wraps and covers the wire insertion hole 3 and the exposed part of the electric wire 27.

[0039] Currently, according to research and investigation, the main reasons for potential safety hazards during the actual use of distribution cabinets are as follows: 1. Leakage and fire ignition. Due to reasons such as rain, humidity, and aging, the insulation of the wires in the distribution cabinet decreases, resulting in leakage. When there is leakage, local high temperatures may be generated, causing nearby combustibles to catch fire, thus triggering a fire. 2. Short - circuit and fire ignition. The insulation of the wire is damaged, causing the live wire to come into direct contact with the neutral wire or the ground wire, resulting in a short - circuit. When there is a short - circuit, the current increases sharply, instantaneously generating a large amount of heat and sparks, igniting the surrounding combustibles. 3. Overload and fire ignition. That is, when the actual current exceeds the safe current - carrying capacity, the temperature continues to rise, accelerating the aging of the insulation layer. In severe cases, it may even directly ignite the flammable materials around the wire.

[0040] In summary, the common cause is the aging of the wires, which leads to a decline in insulation performance, thus resulting in potential safety hazards. Among them, when connecting the control switch, some of the wires at the wire port are directly exposed to the air, and the connection part of the terminal block is also exposed to the air. Compared with the other parts of the wire, the insulation layer at this position ages first, and the potential safety hazard at this position is the greatest. Therefore, it is necessary to protect the connection part of the control switch. In this case, the main protection is carried out at this position to achieve the purpose of reducing potential safety hazards. The specific implementation methods are as follows:

[0041] See Figure 2 and Figure 5 During wiring, certain preparations are required. First, closely attach the installation box 5 to the back panel inside the distribution cabinet 1 against the control switch 2. It can be installed using bolts or other existing methods. Then, pass the external wire 27 into the embedded groove inside the installation box 5, and remove the insulation skin at its front end. Insert the wire end of the wire 27 into the wiring hole 3 on the control switch 2, and then tighten the bolt on it to connect the wire to the control switch 2. The connection method is the same as the existing method.

[0042] After connection, install the top cover 6 on the installation box 5 to form a sealed space separated from the external environment. This sealed space can, on the one hand, prevent the influence of external moisture or other environmental factors on the exposed part of the wire 27, and on the other hand, prepare for possible emergencies in the future.

[0043] When the local temperature at the wiring connection rises sharply due to the above reasons and exceeds the preset value, the fire extinguishing component installed in the installation box 5 will spray an insulating substance towards the wire insertion hole 3, and make it wrap and cover the wire insertion hole 3 and the exposed part of the wire 27. In this way, using a layer of insulating substance to cover the exposed wire part can, on the one hand, achieve the effect of insulation and isolation, preventing electric leakage or even the occurrence of sparks in the first place, and on the other hand, it can also quickly isolate it from the external aerobic environment, avoiding the direct occurrence of a fire, and winning enough time for subsequent rescue and maintenance, improving the safety performance;

[0044] Moreover, it is worth mentioning that since there are many control switches 2 and wires 27 in the power distribution cabinet 1, as Figure 1 shown, therefore, the corresponding design of the above installation box 5 can not only avoid the associated influence of the fault location on adjacent control switches 2, but also the separate design of the fire extinguishing component provides convenience for the subsequent replacement of the control switch 2, avoiding the entire pollution of the power distribution cabinet 1 and being difficult to clean.

[0045] In one relatively preferred embodiment, an implementation manner of the fire extinguishing component is provided;

[0046] The fire extinguishing component includes a sliding frame 7 slidably installed on the inner wall of the installation box 5. An elevator plate 8 is slidably installed on the inner wall of the sliding frame 7. A swing rod 9 is rotatably connected between the elevator plate 8 and the inner wall of the installation box 5. A torsion spring is installed at the connection between the swing rod 9 and the installation box 5, and the torsion spring applies a torsional force to the swing rod 9 to rotate away from the wire insertion hole 3. A fixed cylinder 10 is fixed on the inner wall of the installation box 5 away from the control switch 2, and a piston cylinder 11 is slidably installed in the fixed cylinder 10. A piston rod 12 is slidably installed on the inner wall of the piston cylinder 11 through a piston plate. One end of the piston rod 12 penetrates and is fixed on the outer wall of the sliding frame 7 close to the control switch 2. A discharge channel 13 is opened inside the piston rod 12, and a second plug 15 is embedded at the position of the outlet of the discharge channel 13, and a ventilation hole is provided on the second plug 15. A through groove for the fixed cylinder 10 to pass through is opened on the outer wall of the sliding frame 7 close to the control switch 2. The piston cylinder 11 is filled with a flowing insulating substance;

[0047] The fire extinguishing component further includes a locking part, and the locking part is used to lock the position of the sliding frame 7 and release the lock on the sliding frame 7 after the temperature in the installation box 5 exceeds the preset value.

[0048] Specifically refer to Figure 5, where the shown state is that the torsion spring is in a twisted state and the locking part is in a locked state with respect to the sliding frame 7. When the temperature at the wiring connection rises, the temperature in the space formed between the wire insertion hole 3, the sliding frame 7, and the top cover 6 will rise sharply. When it exceeds the preset value, the locking part releases the locking effect on the sliding frame 7. At this time, under the action of the torsional force accumulated by the torsion spring, the swing rod 9 will rotate away from the control switch 2, thereby driving the lifting plate 8 to move upward in the sliding frame 7. At the same time, it will also drive the sliding frame 7 to slide away from the control switch 2, causing the piston rod 12 to slide into the piston cylinder 11. Under the action of the internal pressure, the insulating substance inside it is extruded from the discharge channel 13, and at the same time, the second plug 15 is also extruded to achieve the purpose of insulating and wrapping the exposed part of the above-mentioned wire;

[0049] It is worth mentioning that since the space between the sliding frame 7 and the wire insertion hole 3 is relatively small in the initial state, its temperature change will be more obvious, so that the locking part can react more quickly and accurately. Moreover, since the sliding frame 7 will move away from the wire insertion hole 3 after unlocking, this will instantly expand the space. The expansion of the space will not only reduce the internal oxygen concentration but also form a low-pressure environment, which can not only avoid direct ignition but also prevent an explosion phenomenon from occurring due to a sharp rise in temperature at this position, further improving the safety performance.

[0050] In one relatively preferred embodiment, an implementation manner of the locking part is provided;

[0051] The locking part includes a groove 19 opened on the outer wall of the top cover 6. A locking hook 20 is rotatably installed on the inner wall of the groove 19, and one end of the locking hook 20 is provided as a hook. A bimetallic strip 21 is also installed on the inner wall of the groove 19, and the bimetallic strip 21 contacts and abuts against the end of the locking hook 20 away from the hook.

[0052] Specifically, refer to Figure 3 , when installing the top cover 6, the outer wall of the sliding frame 7 can be hooked by the hook. After the top cover 6 is installed, the hook will play a role in sliding limit for the sliding frame 7;

[0053] When the temperature in the space where the wire insertion hole 3 is located rises sharply, the bimetallic strip 21 in the groove 19 will bend under the temperature change and push against the locking hook 20 to rotate until the hook disengages from the sliding frame 7, thereby achieving the release of the locking effect on the sliding frame 7 and completing the subsequent insulation covering process;

[0054] From Figure 3 it can be seen that the position of the groove 19 and the design of the hook are located at the position of the sliding frame 7 close to the wire insertion hole 3, so that the bimetallic strip 21 can sense the temperature change in the first time and thus can unlock the sliding frame 7 in time.

[0055] In one of the more preferred embodiments, an implementation method of extruding an insulating material is provided;

[0056] A partition layer 17 and a diaphragm 18 vertically arranged on the inner wall of the piston cylinder 11 are fixed. The partition layer 17 and the diaphragm 18 divide the interior of the piston cylinder 11 into two sealed and mutually isolated storage chambers. The two storage chambers respectively store epoxy resin and curing agent.

[0057] A fine hole is also formed inside the piston rod 12, and a first plug 14 is embedded at the outlet of the fine hole. One end of the first plug 14 is connected to an insertion wire 16, which penetrates through a partition layer 17 and alternately penetrates the storage cavities on both sides thereof. The partition layer 17 is made of paraffin.

[0058] For details, please refer to Figure 3 and Figure 7 As can be seen from the above content, the movement of the sliding frame 7 is driven by the instantaneous release of the torsion force of the torsion spring after the lock is released, so the sliding of the sliding frame 7 is fast, so when the piston rod 12 slides into the piston cylinder 11, the internal pressure thereof will increase sharply. Under the action of the internal pressure thereof, the first plug 14 will directly spray outward and drive the insertion wire 16 to be pulled outward. As the insertion wire 16 is pulled, one end of the insertion wire 16 inserted in the two storage cavities will tear the partition layer 17, so that the epoxy resin and the curing agent in the two storage cavities are mixed together, and as the insertion wire 16 is pulled, the mixing becomes more uniform. While the two are mixed, they are also squeezed out from the discharge channel 13 to cover the wire insertion hole 3 with the insulating material.

[0059] During this process, it is worth noting that the separation layer 17 is made of paraffin, so that when the temperature rises sharply, it becomes soft and melted, so that the epoxy resin and the curing agent can be mixed in advance, and it is also convenient for the pulling of the inserted wire 16, further improving the mixing effect of the two, and further improving the insulation performance for the subsequent covering of the insulating material.

[0060] In one of the more preferred embodiments, in order to further improve the spraying effect of the insulating material and the accidental touch resistance during the installation process, an implementation method for storing the insulating material is provided;

[0061] An expansion chamber 24 is formed between the side of the fixed cylinder 10 away from the piston rod 12 and the inner wall of the piston cylinder 11. The expansion chamber 24 is connected to the space above the lifting plate 8 through a connecting pipe 23. The outer wall of the sliding frame 7 above the lifting plate 8 is also provided with an air leakage hole 22. The outer wall of the piston cylinder 11 is also provided with a one-way tooth 25, and the one-way tooth 25 is designed at a right angle.

[0062] Since the wire 27 and the control switch 2 need to be installed or disassembled, but in the absence of an emergency, there is no need to spray the insulating material. Therefore, the handling of the wire 27 in the safe state and the emergency state needs to be separated;

[0063] Install in the safe state. When installing the top cover 6, after hooking the locking hook 20 on the sliding frame 7, sliding the top cover 6 can drive the sliding frame 7 to slide, thereby driving the swing rod 9 to swing so that the torsion spring starts to accumulate torsional force. During this process, the top cover 6 is in a stable sliding state until the top cover 6 is installed and fixed. At this time, the sliding frame 7 is in a locked state;

[0064] During this process, the sliding frame 7 will drive the piston rod 12 to be pulled outwards. To prevent the premature mixing of the above-mentioned insulating material, a vent hole is provided on the second plug 15 to allow air to pass through to balance the internal and external air pressure changes. At the same time, the lifting plate 8 will slide downwards in the sliding frame 7 as the swing rod 9 swings, increasing the space above it. At this time, the vent hole 22 opened on the outer wall of the sliding frame 7 also serves to balance the air pressure change, so that it will not affect the piston cylinder 11 and the insulating material therein during the installation process;

[0065] Similarly, when disassembling the top cover 6, it can be smoothly slid open, and it will not affect the insulating material in the piston cylinder 11 either;

[0066] In the emergency state, when the sliding frame 7 is unlocked, the air in the piston cylinder 11 cannot be discharged in time from the vent hole on the second plug 15 due to the instantaneous release of the torsional force of the torsion spring, that is, the internal pressure cannot be discharged in time. Therefore, the first plug 14 and the second plug 15 will be directly extruded, thus achieving the effect of discharging the insulating material;

[0067] Moreover, during this process, since the lifting plate 8 also moves upwards rapidly in the sliding frame 7, the air pressure in the space above it will also increase instantaneously. The vent hole 22 cannot relieve the pressure in time. Therefore, the air inside it will be discharged into the expansion chamber 24 through the connecting pipe 23, causing the air pressure inside it to increase rapidly, moving the piston cylinder 11 towards the direction close to the control switch 2, and the one-way tooth 25 can also play a one-way limiting role. In this way, the relative movement of the piston rod 12 and the piston cylinder 11 can not only further increase the internal pressure, but also help the insulating material to have sufficient initial velocity when shooting out of the discharge channel 13, so that the covering strength in the wiring hole 3 is higher and the insulation effect is better.

[0068] In this way, through the cooperation of the above structures, the use of the insulating material can be triggered only in an emergency and will not be affected during the normal disconnection and connection of wires.

[0069] In one of the more preferred embodiments, a detachable base 4 is installed at the bottom of the installation box 5, and the embedding groove is opened on the joint surface of the base 4 and the installation box 5, and a sealing cushion layer is provided in the embedding groove.

[0070] See Figure 5 , by designing the base 4 and the installation box 5 to be detachable, it is convenient for the connection of the wire 27, and the base 4 can be installed on the installation box 5 through bolts, and the base 4 can also be installed on the back panel in the power distribution cabinet 1 in advance.

[0071] In one of the more preferred embodiments, slide rails 28 are provided at the top edge of the installation box 5, and the top cover 6 is slidably installed on the installation box 5 through the slide rails 28, and a locking block 26 for limiting the top cover 6 is rotatably installed on the outer wall of the edge of the installation box 5.

[0072] See Figure 6 , after the top cover 6 is slidably installed, it can be limited and locked by rotating the locking block 26. The structure is simple and the operation is convenient, and the design of the slide rails 28 can also keep the top cover 6 and the installation box 5 in a fitting state.

[0073] In one of the more preferred embodiments, the diaphragm 18 is set as an integral structure, and the interspersed wire 16 passes through the diaphragm 18 and is fixedly connected to the penetration part of the diaphragm 18. The diaphragm 18 is designed as an integral structure, which can cause the interspersed wire 16 to be damaged when pulled, thereby ensuring the mixing and spraying of the insulating substance.

[0074] In one of the more preferred embodiments, the discharge channel 13 is provided with an inclined mouth, and the opening direction is aligned with the position of the wire insertion hole 3. By designing the opening direction of the discharge channel 13, the sprayed insulating material can fill and cover the wire insertion hole 3 in the first time, so as to better isolate it from the external environment (oxygen or moisture and external combustibles, etc.).

[0075] In one of the more preferred embodiments, sealing washers are provided at the fitting positions of the installation box 5 and the top cover 6 and the control switch 2. By installing the sealing washers, the isolation effect between the formed sealed space and the external environment can be further improved, and the intrusion of external moisture can be further prevented.

[0076] The standard parts used in this embodiment can be directly purchased from the market, and the non-standard structural components recorded according to the description and the drawings can also be directly processed without any doubt according to the existing technical knowledge. At the same time, the connection methods of each component adopt the mature conventional means in the existing technology, and the machines, parts and equipment all adopt the conventional models in the existing technology, so no specific description will be made here.

[0077] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power system safety distribution cabinet, comprising a distribution cabinet (1), wherein a control switch (2) is installed in the distribution cabinet (1), and the control switch (2) has a wire insertion hole (3) for inserting the end of a wire (27) of a power line, characterized in that: Also includes: An installation box (5) is installed in the power distribution cabinet (1) and is designed to fit the wire insertion hole (3) on the control switch (2), and an embedded groove capable of routing the power line (27) is provided in the installation box (5); A top cover (6) is detachably mounted on the opening above the installation box (5), and a closed space that wraps the wire insertion hole (3) is formed between the top cover (6), the installation box (5) and the control switch (2); A fire extinguishing component is installed in the installation box (5). When the temperature in the sealed space exceeds a preset value, the fire extinguishing component sprays insulating material toward the wire insertion hole (3) and wraps and covers the exposed parts of the wire insertion hole (3) and the wire (27).

2. The power system safety distribution cabinet according to claim 1, characterized in that: The fire extinguishing assembly comprises a sliding frame (7) slidably mounted on the inner wall of the installation box (5); a lifting plate (8) is slidably mounted on the inner wall of the sliding frame (7); a swing rod (9) is rotatably connected between the lifting plate (8) and the inner wall of the installation box (5); a torsion spring is mounted at the connection between the swing rod (9) and the installation box (5); and the torsion spring applies a torsional force to the swing rod (9) to rotate in a direction away from the plug hole (3); a fixed cylinder (10) is fixed to the inner wall of the installation box (5) away from the control switch (2); and a piston cylinder (11) is slidably mounted in the fixed cylinder (10); and the piston cylinder The inner wall of the sliding frame (11) is slidably mounted with a piston rod (12) through a piston plate, one end of the piston rod (12) penetrates and is fixed to the outer wall of the sliding frame (7) close to the control switch (2), a discharge channel (13) is provided inside the piston rod (12), and a second plug (15) is embedded and installed at the position of the outlet of the discharge channel (13), and a vent hole is provided on the second plug (15), the outer wall of the sliding frame (7) close to the control switch (2) is provided with a through groove for the fixed cylinder (10) to pass through, and the piston cylinder (11) is filled with a flowing insulating material; The fire extinguishing assembly further comprises a locking portion, and the locking portion is used to lock the position of the sliding frame (7) and to unlock the sliding frame (7) after the temperature in the installation box (5) exceeds a preset value.

3. The power system safety distribution cabinet according to claim 2 is characterized in that: The locking portion comprises a groove (19) formed on the outer wall of the top cover (6); a lock hook (20) is rotatably mounted on the inner wall of the groove (19); one end of the lock hook (20) is configured as a curved hook; a bimetallic strip (21) is also mounted on the inner wall of the groove (19); and the bimetallic strip (21) contacts and abuts against one end of the lock hook (20) away from the curved hook.

4. The power system safety distribution cabinet according to claim 2, characterized in that: A partition layer (17) and a diaphragm (18) vertically arranged to the partition layer (17) are fixed to the inner wall of the piston cylinder (11); the partition layer (17) and the diaphragm (18) divide the interior of the piston cylinder (11) into two sealed and mutually isolated storage chambers, wherein the two storage chambers respectively store epoxy resin and curing agent; A fine hole is also formed inside the piston rod (12), and a first plug (14) is embedded at the outlet of the fine hole. One end of the first plug (14) is connected to an insertion wire (16). The insertion wire (16) penetrates through the partition layer (17) and alternately penetrates the storage cavities on both sides thereof. The partition layer (17) is made of paraffin.

5. The power system safety distribution cabinet according to claim 4, characterized in that: An expansion chamber (24) is formed between the side of the fixed cylinder (10) away from the piston rod (12) and the inner wall of the piston cylinder (11); the expansion chamber (24) is connected to the space above the lifting plate (8) through a connecting pipe (23); an air leakage hole (22) is also provided on the outer wall of the sliding frame (7) above the lifting plate (8); and a one-way tooth (25) is also provided on the outer wall of the piston cylinder (11), and the one-way tooth (25) is designed to be at a right angle.

6. The power system safety distribution cabinet according to claim 1, characterized in that: A detachable base (4) is installed at the bottom of the installation box (5), and the embedding groove is provided on the fitting surface between the base (4) and the installation box (5), and a sealing gasket layer is provided in the embedding groove.

7. The power system safety distribution cabinet according to claim 1, characterized in that: A slide rail (28) is provided at the top edge of the installation box (5), and the top cover (6) is slidably installed with the installation box (5) via the slide rail (28), and a locking block (26) for limiting the position of the top cover (6) is also rotatably installed on the outer wall of the edge of the installation box (5).

8. The power system safety distribution cabinet according to claim 4, characterized in that: The diaphragm (18) is provided as an integral structure, and the insertion wire (16) passes through the diaphragm (18) and is fixedly connected to the penetration point of the diaphragm (18).

9. The power system safety distribution cabinet according to claim 2, characterized in that: The discharge channel (13) is configured as an oblique opening, and the opening direction is aligned with the position of the wire insertion hole (3).

10. The power system safety distribution cabinet according to any one of claims 1 to 9, characterized in that: Sealing gaskets are provided at the locations where the installation box (5) and the top cover (6) fit with the control switch (2).

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