A power distribution cabinet for electrical equipment

Abstract

The application relates to the technical field of smart power grids, and discloses a power distribution cabinet for electrical equipment, which comprises a power distribution cabinet, a zero line row arranged in the power distribution cabinet and electrically connected with the branch line, a conductive pin in sustained conductive contact with the zero line row, a pressing assembly comprising a pressing ring capable of being sleeved on the conductive pin, and a heat-sensitive trigger piece which releases the pressing effect of the pressing ring when the temperature of the conductive pin exceeds a threshold value, so that the contact piece instantaneously releases the zero line row and forms a repair gap therebetween, and then re-closes. When the temperature exceeds the threshold value, the heat-sensitive trigger piece instantaneously releases the pressing force of the pressing ring, so that a controllable repair gap is formed between the contact piece and the zero line row, and under the shearing action, the silver powder and the reducing agent are released by breaking the microcapsules, then the silver powder is sintered by Joule heat to form a dense conductive layer and reduce the oxidation layer, so that the effects of automatically repairing electrochemical corrosion, restoring low contact resistance and avoiding continuous high-temperature fire are achieved.

Description

Technical Field

[0001] This invention relates to the field of smart grid technology, specifically to a power distribution cabinet for electrical equipment. Background Technology

[0002] Distribution cabinets are generally used in situations with fewer circuits and more dispersed loads, while motor control centers are generally used in situations with more circuits and more concentrated loads. They distribute the electrical energy of a certain circuit of the upper-level power distribution equipment to the nearest load, while distribution cabinets are devices that can provide protection, monitoring and control for the load.

[0003] Currently, in low-voltage switchgear, the neutral busbar (N busbar) typically runs across the entire cabinet in the form of exposed copper or aluminum busbars. It collects and distributes neutral wires from various circuits by bolting. Since the surface of the neutral busbar is completely exposed and there are numerous bolting points, this is the area that ages first. Especially in humid environments, the exposed copper busbar surface and bolting points are prone to oxide film and electrochemical corrosion, which gradually reduces the effective contact area. This leads to increased resistance and temperature in localized areas. According to field measurement data, the temperature difference between bolting points on the same busbar can reach more than 30°C, and the highest temperature rise in localized hot spots exceeds 90°C, accelerating insulation aging and posing a fire hazard. Summary of the Invention

[0004] The purpose of this invention is to provide a power distribution cabinet for electrical equipment to solve at least one technical problem existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a power distribution cabinet for electrical equipment, comprising a power distribution cabinet, wherein a neutral busbar is arranged inside the power distribution cabinet and electrically connected to the branch circuit wires, and further comprising:

[0006] A conductive pin, which has an external thread and can be directly screwed into the threaded hole of the neutral busbar, and maintains continuous conductive contact with the neutral busbar;

[0007] A clamping assembly includes a clamping ring that can be fitted onto a conductive pin, and the clamping ring is used to clamp the contact piece at the end of the wire onto the neutral busbar.

[0008] The thermal trigger releases the clamping action of the pressure ring when it detects that the temperature of the conductive pin exceeds a threshold, causing the contact plate to instantly loosen the neutral busbar and form a repair gap between it, and then closes again.

[0009] The microcapsule is fitted inside the annular groove on the outer wall of the conductive pin and located within the repair gap. After being broken by the shearing action between the conductive pin and the contact plate, the microcapsule releases silver powder filler and reducing agent. When the contact plate is closed, the silver powder is sintered and diffused through Joule heating.

[0010] Optionally, the clamping assembly includes a power connector, a piezoelectric plate rotatably mounted on the top of the power connector, an elongated groove on the top of the piezoelectric plate, the width of the elongated groove being greater than the diameter of the conductive pin and less than the diameter of the pressure ring, a slide bar slidably mounted in the elongated groove, and the end of the slide bar being configured as a wedge with an inclined surface, and a through-hole wedge groove being opened on the side of the conductive pin, and the inclined surface in the wedge groove being opposite to the inclined surface of the wedge.

[0011] Optionally, the thermal trigger includes a flip rod rotatably mounted on the top of the piezoelectric plate and a pressure rod rotatably mounted on the top of the slide bar. The end of the pressure rod is rotatably connected to the middle section of the flip rod, and a tension spring is connected between the side of the slide bar away from the wedge and the inner wall of the long groove.

[0012] It also includes a bimetallic strip installed on the top of the piezoelectric plate away from the rotation point, and the piezoelectric plate is embedded with a heat-conducting wire that contacts the bimetallic strip and the conductive pin. When the flip rod rotates to be in the same plane as the pressure rod, the bent end of the flip rod contacts the bimetallic strip.

[0013] Optionally, a fixed shaft is fixed to the top of one side of the power base via a shaft seat. The piezoelectric plate is rotatably mounted on the fixed shaft. Insertion holes are provided inside the piezoelectric plate and on the side of the fixed shaft. A plug rod that can be inserted into the insertion hole is fixed to the side of the slide bar. A pressing protrusion is also coaxially fixed at the rotation point of the flip rod. A vertical wing is integrally formed on the top of the pressure ring. When the flip rod is rotated 180 degrees, the protruding position of the pressing protrusion contacts the vertical wing and presses it downward.

[0014] Optionally, the top of the power connector is also equipped with an elastic element, and the top of the elastic element is provided with a groove for embedding and fixing the power line.

[0015] Optionally, the top surface of the piezoelectric plate is equipped with a buckle, and the buckle can be engaged by a flip bar.

[0016] Optionally, the bent end of the flip bar is provided with a counterweight roller.

[0017] Optionally, the microcapsule has a double-layer structure, with an outer layer of melamine-formaldehyde resin and an inner layer of paraffin wax, and is filled with nano-silver powder and a reducing agent.

[0018] Optionally, the power connector can be detachably installed on the inner wall of the distribution cabinet by means of bolt connection, and corresponds to a single screw hole on the neutral busbar.

[0019] Optionally, the neutral busbar is an integral copper busbar design, and both ends of the neutral busbar are installed on the inner wall of the distribution cabinet through insulators.

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

[0021] I. This invention uses a thermal trigger to instantly release the clamping force of the pressure ring when the temperature exceeds a threshold, so that a controllable repair gap is formed between the contact plate and the neutral busbar. Under shearing action, the microcapsules are broken to release silver powder and reducing agent. Subsequently, the silver powder is sintered by Joule heating to form a dense conductive layer and reduce the oxide layer, thus achieving the effects of online automatic repair of electrochemical corrosion, restoration of low contact resistance, and prevention of continuous high temperature fire.

[0022] Third, by precisely targeting the smallest failure unit, "neutral busbar / ground busbar + compression connection", this invention makes the aging of the microenvironment caused by moisture or salt spray corrosion of the joint visible and treats it locally. This achieves the effect of curbing the risk of a single microenvironment at the bud stage, significantly reducing the probability of fire in the entire cabinet, and buying valuable time for subsequent maintenance. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the power distribution cabinet of the present invention;

[0024] Figure 2 This is an enlarged perspective view of the neutral busbar and junction box of the present invention;

[0025] Figure 3 This is a front view of the neutral busbar and junction box of the present invention;

[0026] Figure 4 This is an exploded perspective view of the neutral busbar and junction box of the present invention;

[0027] Figure 5 This is a cross-sectional view of the grounding socket and its structure according to the present invention;

[0028] Figure 6 This is a diagram showing the state of the flipping rod and pressure rod of the present invention during flipping.

[0029] Figure 7 This is a three-dimensional structural schematic diagram and a partial view of the grounding socket and its structure according to the present invention;

[0030] Figure 8 This is a schematic diagram showing the state of the pressure plate of the present invention after it is lifted.

[0031] In the diagram: 1. Distribution cabinet; 2. Neutral busbar; 3. Conductive pin; 4. Electrical connector; 5. Piezoelectric plate; 6. Wire; 7. Electrical connector; 8. Long slot; 9. Sliding bar; 10. Pressure bar; 11. Flip bar; 12. Bimetallic strip; 13. Pressure ring; 14. Vertical wing; 15. Wedge groove; 16. Insert rod; 17. Tension spring; 18. Insertion hole; 19. Fixed shaft; 20. Extrusion protrusion; 21. Microcapsule; 22. Elastic element; 23. Buckle. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1 to 8 The present invention provides a technical solution: a power distribution cabinet for electrical equipment, including a power distribution cabinet 1, wherein a neutral busbar 2 is arranged inside the power distribution cabinet 1 and electrically connected to the branch wires 6, and further comprising:

[0034] The conductive pin 3 has an external thread and can be directly screwed into the threaded hole of the neutral busbar 2, and maintains continuous conductive contact with the neutral busbar 2.

[0035] The clamping assembly includes a clamping ring 13 that can be fitted onto the conductive pin 3, and the clamping ring 13 is used to clamp the contact piece 7 at the end of the wire 6 onto the neutral busbar 2.

[0036] The thermal trigger releases the clamping action of the pressure ring 13 when it detects that the temperature of the conductive pin 3 exceeds the threshold, causing the contact plate 7 to instantly loosen the neutral busbar 2 and form a repair gap between it, and then closes again.

[0037] Microcapsule 21 is fitted inside the annular groove on the outer wall of conductive pin 3 and located in the repair gap. After being broken by the shearing action between conductive pin 3 and contact plate 7, microcapsule 21 will release silver powder filler and reducing agent. When contact plate 7 is closed, the silver powder is sintered and diffused by Joule heating.

[0038] Currently, the most common installation method for existing power distribution cabinets, whether it is the neutral busbar, the ground busbar, or the switch wiring, is the bolt + saddle-shaped washer / disc-shaped washer method. Its advantage is that the contact area is large. Compared with the method of tightening the wire end with bolts, the wire core is not easily crushed, and it can also be easily disassembled and reassembled.

[0039] However, the neutral busbar or ground busbar is directly exposed. In addition, most existing distribution cabinets rely on natural ventilation for heat dissipation. Therefore, when the cabinet is humid or contains salt spray, moisture can easily cause electrochemical corrosion between the exposed neutral busbar and the gasket (connector 7), thereby reducing the contact area between the two, increasing resistance and causing local high temperature, which can easily lead to fire and other safety hazards. Therefore, it is necessary to protect the connection of the neutral busbar. In this case, the protection of this position is mainly carried out to reduce safety hazards. The specific implementation method is as follows:

[0040] When using the distribution cabinet 1, refer to the following when connecting the wire 6 to the neutral busbar 2: Figure 4First, the conductive pin 3 needs to be screwed into the threaded hole of the neutral busbar 2 to maintain continuous conductive contact. Second, the contact piece 7 at the end of the wire 6 is placed on the conductive pin 3, and the contact piece 7 is pressed onto the neutral busbar 2 by the pressure ring 13 in the clamping assembly. This completes the connection of the neutral circuit.

[0041] During the power-on process, when the resistance between the contact piece 7 and the neutral busbar 2 increases and the temperature rises due to electrochemical corrosion, when the temperature exceeds the threshold, the thermal trigger will cause the pressure ring 13 to briefly release the pressure on the contact piece 7, allowing it to instantly loosen the neutral busbar 2 and form a repair gap between them, so as to repair the corrosion between the contact piece 7 and the neutral busbar 2. Then the pressure ring 13 presses the contact piece 7 back onto the neutral busbar 2.

[0042] During this process, the release of the contact piece 7 will cause it to move outward along the conductive pin 3 momentarily. Therefore, a shearing force will be generated between it and the conductive pin 3 on the microcapsule 21. Combined with the effect of local high temperature, the microcapsule 21 can be broken, and the silver powder filler and reducing agent inside can be released in the repair gap. Then, when the pressing ring 13 presses the contact piece 7 tightly onto the neutral busbar 2 again, the silver powder is sintered and diffused through Joule heating to form a dense conductive layer. At the same time, the reducing agent can also reduce and remove the oxide layer, so that the interface resistance is restored. This avoids the phenomenon of local continuous high temperature and reduces the fire safety hazard of the distribution cabinet 1.

[0043] Moreover, even if the interface resistance cannot be completely restored, this remedial measure can still play a certain delay role, prevent the spread of single-point faults, reduce the probability of fire by orders of magnitude, and provide valuable time for subsequent rescue personnel to repair and maintain.

[0044] It is worth mentioning that this method precisely targets the smallest failure unit, the "neutral / ground busbar + compression connection," making the microenvironmental aging visible, namely, "corrosion of the joints caused by moisture or salt spray leading to fire of the entire cabinet." By addressing small problems first, this method can improve the safety of the single-point microenvironment inside the cabinet compared to simply talking about "moisture and fire prevention of the whole machine," thereby improving the overall safety performance of the machine.

[0045] In one preferred embodiment, an implementation of a clamping component is provided;

[0046] The clamping assembly includes a power connector 4, a piezoelectric plate 5 is rotatably mounted on the top of the power connector 4, and a long groove 8 is formed on the top of the piezoelectric plate 5. The width of the long groove 8 is greater than the diameter of the conductive pin 3 and less than the diameter of the pressure ring 13. A slide bar 9 is slidably mounted in the long groove 8, and the end of the slide bar 9 is set as a wedge with an inclined surface. A through-hole wedge groove 15 is formed on the side of the conductive pin 3, and the inclined surface in the wedge groove 15 is opposite to the inclined surface of the wedge.

[0047] See Figure 4 and Figure 5 First, the connector 4 is installed in the gap between the neutral busbar 2 and the inner wall of the distribution cabinet 1, somewhat like a stapler. Then, after the pressure ring 13 is put on the conductive pin 3, the piezoelectric plate 5 is rotated so that its long groove 8 can be put on the outside of the conductive pin 3. Then, by sliding the adjusting strip 9, the wedge at the front end can be inserted into the wedge groove 15 on the conductive pin 3. By using the squeezing action between the inclined surfaces of the two, the piezoelectric plate 5 can apply pressure to the pressure ring 13, thereby pressing the connector 7 stably on the neutral busbar 2.

[0048] Moreover, it is worth noting that both the electrical connector and the adjusting slider 9 are made of insulating material to prevent the risk of electric shock.

[0049] In one preferred embodiment, a thermal trigger is provided, which is triggered by a temperature rise caused by a local increase in resistance and heat accumulation.

[0050] The thermal trigger includes a flip rod 11 rotatably mounted on the top of the piezoelectric plate 5 and a pressure rod 10 rotatably mounted on the top of the slide bar 9. The end of the pressure rod 10 is rotatably connected to the middle section of the flip rod 11. A tension spring 17 is connected between the side of the slide bar 9 away from the wedge and the inner wall of the long groove 8.

[0051] It also includes a bimetallic strip 12 installed on the top of the piezoelectric plate 5 away from the rotation point, and the piezoelectric plate 5 is embedded with a heat-conducting wire that contacts the bimetallic strip 12 and the conductive pin 3. When the flip rod 11 rotates to the same plane as the pressure rod 10, the bent end of the flip rod 11 contacts the bimetallic strip 12.

[0052] For details, please refer to [link / reference]. Figure 4 and Figure 6 When adjusting the slider 9 so that the wedge at its end is inserted into the wedge groove 15, the adjustment is accomplished by rotating the flip rod 11, which drives the pressure rod 10 to rotate, thereby causing the slider 9 to slide. Simultaneously, the tension spring 17 is stretched, accumulating tensile potential energy. When the flip rod 11 rotates to a state where it is on the same plane as the pressure rod 10, as... Figure 7 As shown, the torque between the tension spring 17 and the pressure rod 10 is zero at this time. Therefore, the flip rod 11, the pressure rod 10 and the slider 9 are all in a balanced state, so the slider 9 can also achieve the self-locking effect.

[0053] As described above, the long groove 8 fits onto the conductive pin 3. Heat-conducting wires can be installed on the inner wall and inside the long groove to allow the conductive pin 3 to quickly transfer heat to the bimetallic strip 12 when the temperature rises. When the temperature of the bimetallic strip 12 exceeds its threshold, it bends and exerts a squeezing force on the flip rod 11, creating an angle between it and the pressure rod 10. Therefore, the balance between the flip rod 11, the pressure rod 10, and the slider 9 is broken. Under the tension of the tension spring 17, the slider 9 slides out of the wedge groove 15, and simultaneously, the pressure rod 10 and the flip rod 11 rotate together. Figure 6 As shown, as the slider 9 gradually separates from the inclined surface of the wedge groove 15, the pressure of the piezoelectric plate 5 on the pressure ring 13 will also gradually be released, thereby releasing the pressing effect of the mating electrode 7, so that a repair gap can be formed between it and the neutral busbar 2, which is convenient for subsequent repair processes.

[0054] In one preferred embodiment, a method is provided in which a repair gap is formed between the contact plate 7 and the neutral busbar 2 and then they are re-pressed to ensure the sintering and diffusion of the silver powder.

[0055] A fixed shaft 19 is fixed to the top of one side of the power base 4 via a shaft seat. The piezoelectric plate 5 is rotatably mounted on the fixed shaft 19. Insertion holes 18 are provided inside the piezoelectric plate 5 and on the side of the fixed shaft 19. A plug rod 16 that can be inserted into the insertion hole 18 is fixed to the side of the slide bar 9. A pressing protrusion 20 is also coaxially fixed at the rotation point of the flip rod 11. The top of the pressure ring 13 is integrally formed with a vertical wing 14. When the flip rod 11 is rotated 180 degrees, the protruding position of the pressing protrusion 20 contacts the vertical wing 14 and presses it downward.

[0056] For details, please refer to [link / reference]. Figure 6 and Figure 7 When the flip rod 11 and the pressure rod 10 are rotating, the movement of the slide bar 9 will first insert the insertion rod 16 on its side into the insertion hole 18 on the piezoelectric plate 5 and the fixed shaft 19, so that the piezoelectric plate 5 and the fixed shaft 19 are locked, that is, the piezoelectric plate 5 is limited.

[0057] Secondly, as shown in the figure, the flip rod 11 is located inside the pressure rod 10. Therefore, when the flip rod 11 is flipped 180 degrees, it can also be located on the same plane as the pressure rod 10. After the flip rod 11 is flipped 180 degrees, the extrusion protrusion 20 at its rotation point will also be flipped 180 degrees. Its protrusion will contact the vertical wing 14 and apply downward extrusion to it and the pressure ring 13 again, thereby achieving the purpose of pressing the contact piece 7 again.

[0058] The upright wing 14 can be made of a thermally conductive material, so that the heat of the conductive pin 3 can be transferred to the heat-conducting wire;

[0059] In this way, by switching the compression method of the pressure ring 13, the initial state is achieved by direct compression by the piezoelectric plate 5, while the subsequent state is achieved by compression of the protrusion 20 to achieve compression of the upright wing 14 and the pressure ring 13. The time between the two is the process of repairing the formation of the gap.

[0060] Furthermore, it is worth mentioning that since the flipping rod 11 and the pressing rod 10 remain on the same plane after rotation, the extrusion protrusion 20 also has a self-locking function, which ensures its stability during the pressing process.

[0061] In one preferred embodiment, an elastic member 22 is also installed on the top of the power connector 4, and the top of the elastic member 22 is provided with a groove that allows the power supply line 6 to be embedded and fixed.

[0062] See Figure 7 and Figure 8 The elastic element 22 is designed to both limit the movement of the wire 6 and provide an upward elastic force. Specifically, when the contact piece 7 is released from pressure, the elastic element 22 will slightly spring upwards to ensure the formation of the repair gap. Simultaneously, it ensures sufficient shearing force between the elastic element 22 and the conductive pin 3 to break the microcapsule 21. For the specific structure, please refer to [reference needed]. Figure 6 As shown, I will not go into details here.

[0063] In one preferred embodiment, a latch 23 is mounted on the top surface of the piezoelectric plate 5, and the latch 23 can be engaged with the flip rod 11. See details below. Figure 7 and Figure 8 The limiting caliper of the buckle 23 can limit the flip lever 11 to a certain extent, preventing it from easily flipping due to accidental triggering or other reasons. It will only flip when it is squeezed by the bimetallic strip 12, thus improving the accuracy of triggering.

[0064] Furthermore, a buckle 23 can also be installed on the slider 9 or on the other side of the piezoelectric plate 5 so that the flip bar 11 can automatically complete the locking after rotating 180 degrees.

[0065] In one preferred embodiment, the bent end of the tilting rod 11 is provided with a counterweight roller, see [reference]. Figure 6 and Figure 7 By adding a counterweight roller, the tilting rod 11 can complete a 180-degree flip during the flipping process by using inertia. This can avoid jamming due to insufficient subsequent stroke and also avoid the influence of structural dead points.

[0066] In one preferred embodiment, the microcapsule 21 has a double-layer structure, with the outer layer being melamine-formaldehyde resin and the inner layer being paraffin wax, and the interior is filled with nano silver powder and a reducing agent.

[0067] By setting the outer layer of microcapsule 21 as melamine-formaldehyde resin, the overall shell can be made rigid, while the inner paraffin layer is a soft layer that is soluble when the temperature rises. When the temperature rises and exceeds the threshold, the melting and expansion of the paraffin can make the shell more easily broken under shearing action, thereby releasing the internal nano silver powder and reducing agent.

[0068] Some low-temperature glass powder can also be added to the filler to form a silver-glass composite conductive layer during sintering, which can further improve the interface strength and oxidation resistance.

[0069] In one preferred embodiment, the grounding socket 4 is detachably installed on the inner wall of the distribution cabinet 1 by means of bolt connection, and corresponds to a single screw hole on the neutral busbar 2.

[0070] In one preferred embodiment, the neutral busbar 2 is an integral copper busbar design, and both ends of the neutral busbar 2 are installed on the inner wall of the distribution cabinet 1 through insulators.

[0071] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A distribution cabinet for electrical equipment, comprising a distribution cabinet (1), wherein a neutral busbar (2) is arranged inside the distribution cabinet (1) and electrically connected to the wires (6) of a branch circuit, characterized in that, Also includes: Conductive pin (3), the conductive pin (3) has external thread and can be directly screwed into the threaded hole of the neutral busbar (2), and maintains continuous conductive contact with the neutral busbar (2); The clamping assembly includes a clamping ring (13) that can be fitted onto the conductive pin (3), and the clamping ring (13) is used to clamp the contact piece (7) at the end of the wire (6) onto the neutral busbar (2); When the thermal trigger detects that the temperature of the conductive pin (3) exceeds the threshold, it releases the pressing action of the pressure ring (13), causing the contact plate (7) to instantly loosen the neutral busbar (2) and form a repair gap between it, and then closes again; Microcapsule (21) is fitted in the annular groove on the outer wall of the conductive pin (3) and located in the repair gap. After the microcapsule (21) is broken by the shearing action between the conductive pin (3) and the contact plate (7), it will release silver powder filler and reducing agent. When the contact plate (7) is closed, the silver powder is sintered and diffused by Joule heating. The clamping assembly includes a power connector (4), a piezoelectric plate (5) is rotatably mounted on the top of the power connector (4), and a long groove (8) is provided on the top of the piezoelectric plate (5). The width of the long groove (8) is greater than the diameter of the conductive pin (3) and less than the diameter of the pressure ring (13). A slide bar (9) is slidably installed in the long groove (8), and the end of the slide bar (9) is set as a wedge with an inclined surface. A through-hole wedge groove (15) is provided on the side of the conductive pin (3), and the inclined surface in the wedge groove (15) is opposite to the inclined surface of the wedge. The thermal trigger includes a flip rod (11) rotatably mounted on the top of the piezoelectric plate (5) and a pressure rod (10) rotatably mounted on the top of the slide bar (9). The end of the pressure rod (10) is rotatably connected to the middle section of the flip rod (11). A tension spring (17) is connected between the side of the slide bar (9) away from the wedge and the inner wall of the long groove (8). It also includes a bimetallic strip (12) installed on the top of the piezoelectric plate (5) away from the rotation point, and the piezoelectric plate (5) is embedded with a heat-conducting wire that contacts the bimetallic strip (12) and the conductive pin (3). When the flip rod (11) rotates to the same plane as the pressure rod (10), the bent end of the flip rod (11) contacts the bimetallic strip (12).

2. The distribution cabinet for electrical equipment according to claim 1, characterized in that: The top of one side of the electrical base (4) is fixed with a fixed shaft (19) by a shaft seat. The piezoelectric plate (5) is rotatably mounted on the fixed shaft (19). The piezoelectric plate (5) and the side of the fixed shaft (19) are both provided with insertion holes (18). The side of the slide bar (9) is fixed with a plug rod (16) that can be inserted into the insertion hole (18). The rotating point of the flip rod (11) is also coaxially fixed with a pressing protrusion (20). The top of the pressure ring (13) is integrally formed with a vertical wing (14). When the flip rod (11) is rotated 180 degrees, the protruding position of the pressing protrusion (20) contacts the vertical wing (14) and presses it downward.

3. The electrical equipment distribution cabinet according to claim 1, characterized in that: The top of the power connector (4) is also equipped with an elastic element (22), and the top of the elastic element (22) is provided with a groove for embedding and fixing the power supply line (6).

4. The distribution cabinet for electrical equipment according to claim 1, characterized in that: The top surface of the piezoelectric plate (5) is equipped with a buckle (23), and the buckle (23) can be engaged by the flip bar (11).

5. The distribution cabinet for electrical equipment according to claim 1, characterized in that: The bent end of the flip bar (11) is provided with a counterweight roller.

6. The power distribution cabinet for electrical equipment according to claim 1, characterized in that: The microcapsule (21) has a double-layer structure, with the outer layer being melamine-formaldehyde resin and the inner layer being paraffin wax, and is filled with nano silver powder and reducing agent.

7. The electrical equipment distribution cabinet according to any one of claims 1-5, characterized in that: The junction box (4) is detachably installed on the inner wall of the distribution cabinet (1) by means of bolt connection, and corresponds to the screw hole on the neutral busbar (2) in a single manner.

8. The electrical equipment distribution cabinet according to any one of claims 1-6, characterized in that: The neutral busbar (2) is an integral copper busbar design, and both ends of the neutral busbar (2) are installed on the inner wall of the distribution cabinet (1) through insulators.

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