Multi-terminal detection compensation power distribution cabinet

Abstract

The application relates to the technical field of detection cabinets, and provides a multi-end detection compensation power distribution cabinet, which comprises a cabinet body; a high-voltage terminal plate assembly, a low-voltage terminal plate and a high-voltage release mechanism are fixed in the cabinet body; a first detection port and a second detection port are respectively arranged; the high-voltage terminal plate assembly comprises guide pipes, a high-voltage terminal plate, a lower control plate and a variable connecting piece, the two guide pipes are symmetrically fixed on the cavity walls of the two sides of the cabinet body, the high-voltage terminal plate is fixedly connected between the two guide pipes, the lower control plate is slidably arranged between the two guide pipes, the top surface of the lower control plate is in sliding contact with the bottom surface of the high-voltage terminal plate, one end of the variable connecting piece is connected with the cavity wall of the cabinet body, the variable connecting piece provides a release channel for the heat of the low-voltage area and rapidly increases the heat energy of the high-voltage area, orderly conduction and step-by-step response of the heat are realized, the pressure relief response time is shortened, and the safety protection efficiency of the cabinet body is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of testing cabinet technology, and in particular to a multi-terminal testing and compensation power distribution cabinet. Background Technology

[0002] In the field of power distribution systems, distribution cabinets, as core terminal equipment for power distribution and control, are widely used in various scenarios such as industrial production, high-rise buildings, and data centers. Their operational stability and safety are directly related to the reliability of power supply and the safety of surrounding personnel and equipment. To prevent external dust, moisture, foreign objects, and corrosive substances from entering the cabinet and to prevent the insulation performance of electrical components from deteriorating and causing faults due to poor contact, existing distribution cabinets mostly adopt a fully enclosed structure design. At the same time, to achieve hierarchical distribution and control of power, the cabinet is usually divided into high-voltage and low-voltage areas, with corresponding high-voltage terminal boards and low-voltage terminal boards, and independent detection ports are provided to ensure that the high and low voltage areas are used separately and do not interfere with each other during normal operation. The fully enclosed structure can also effectively reduce the corrosion of the distribution electrical components by the external environment and reduce the risk of damage to faulty components.

[0003] Currently, the high and low voltage areas of the distribution cabinets on the market are usually fixedly separated. Even if a thermal high voltage fault occurs in the high voltage area, the low voltage area cannot be connected to the high voltage area. As a result, the heat generated by heat conduction in the low voltage area cannot be discharged synchronously, which further aggravates the overall heat load in the cabinet. Existing pressure relief valves lack a self-triggering, efficient pressure relief mechanism and have a delayed response. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a multi-terminal detection and compensation distribution cabinet, comprising a cabinet body; a high-voltage terminal block assembly, a low-voltage terminal block, and a high-voltage release mechanism are fixed inside the cabinet body; a first detection port and a second detection port are respectively provided on the back of the cabinet body corresponding to the positions of the high-voltage terminal block assembly and the low-voltage terminal block. The high-voltage terminal block assembly includes guide tubes, a high-voltage terminal block, a lower control board, and a variable connector. Two guide tubes are symmetrically fixed to the two side walls of the cabinet. The high-voltage terminal block is fixedly connected between the two guide tubes. The lower control board is slidably disposed between the two guide tubes, with its top surface in sliding contact with the bottom surface of the high-voltage terminal block. One end of the variable connector is connected to the cavity wall of the cabinet, and the other end is connected to one end of the lower control board, with the connection position along the movement direction of the lower control board. The high-voltage terminal block has several evenly distributed upper through holes, and the lower control board has several evenly distributed lower through holes. When the variable connector is in its normal state, the lower through holes and upper through holes are misaligned. When the variable connector is heated and expands, it moves the lower control board, causing the lower through holes to overlap with the upper through holes. The cabinet is provided with a pressure relief hole. The high-pressure release mechanism includes a spring-loaded pressure relief valve installed in the pressure relief hole and a heat collection pipe located above the high-pressure terminal block and connected to the spring-loaded pressure relief valve. The air inlet of the heat collection pipe faces downward and is located above the high-pressure terminal block.

[0005] Preferably, the first detection port and the second detection port are fitted with seals.

[0006] Preferably, the low-voltage terminal block is disposed below the lower control board and forms a low-voltage chamber between the low-voltage terminal block and the lower control board, and a high-voltage chamber is formed between the high-voltage terminal block and the top cavity wall of the cabinet.

[0007] Preferably, the ends of the two guide tubes away from the variable connector are connected to a connecting tube. Guide rods are fixed at both ends of the connecting tube, and pulleys are fixed on the two guide rods. The two guide rods are inserted into the corresponding guide tubes and roll in contact with the inner wall of the connecting tube through the pulleys. The end of the lower control plate away from the variable connector is connected to the connecting tube.

[0008] Preferably, the high-pressure release mechanism further includes a heat collection cover corresponding to the lower part of the heat collection pipe and fixed inside the cabinet. The heat collection pipe consists of several pipes arranged parallel to each other. The bottom of each heat collection pipe is connected to a row of lead pipes. The bottom ends of all lead pipes are vertically downward and connected to the heat collection cover. The opening of the heat collection cover faces downward, so that the bottom ends of all lead pipes correspond to the high-pressure chamber to absorb heat.

[0009] Preferably, a plurality of first assembly rods are connected between the two guide tubes, and the high-voltage terminal plate is correspondingly disposed below the guide tubes; a first heat dissipation cavity is formed between two adjacent first assembly rods, one first heat dissipation cavity corresponds to two rows of upper through holes, and a first assembly groove is provided on the first assembly rod.

[0010] Preferably, a plurality of second mounting rods are fixed on the top of the low-voltage terminal board, a second heat dissipation cavity is formed between two adjacent second mounting rods, and a second mounting groove is provided on the second mounting rod.

[0011] Preferably, the heat collection pipe has tubular diameter reducing sections at both ends, the other end of the tubular diameter reducing section is connected to the cabinet, the cabinet has a discharge port corresponding to the tubular diameter reducing section, and the spring-loaded pressure relief valve is installed inside the tubular diameter reducing section corresponding to the discharge port.

[0012] Furthermore, it also includes an explosion-proof isolation section, which includes an isolation protection tube. An explosion-proof accommodating cavity is formed inside the isolation protection tube. The explosion-proof accommodating cavity is filled with perfluorohexanone. An overflow explosion-proof hole communicating with the explosion-proof accommodating cavity is formed on the high-voltage terminal block. A thermal strain section is provided on the overflow explosion-proof hole. When heated, the thermal strain section actuates to open the overflow explosion-proof hole.

[0013] Furthermore, the thermal strain unit includes a thermal strain gauge and a sealing plate. The sensing end of the thermal strain gauge is disposed at the air inlet of the heat collection tube, and the actuating end of the thermal strain gauge is formed with a puncture needle. The sealing plate is disposed at the overflow explosion-proof hole. When the thermal strain gauge is heated and actuated, the sealing plate is destroyed by the puncture needle.

[0014] The advantages of this invention compared to the prior art are: A spring-loaded pressure relief valve is installed on the distribution cabinet. The cabinet is divided into high-voltage and low-voltage zones. The high-voltage zone contains a high-voltage terminal block assembly, and the low-voltage zone contains a low-voltage terminal block. The high-voltage terminal block assembly consists of an upper high-voltage terminal block and a lower control board, forming a two-layer sliding plate structure. A variable coupling is connected between the back of the lower control board and the cabinet. When high temperatures occur inside the cabinet, the variable coupling's thermal expansion characteristics automatically push the control board to close the through-hole, connecting the high and low-voltage zones and collecting heat energy. This ultimately triggers the spring-loaded pressure relief valve to open, ensuring safe heat release even with a highly sealed cabinet and preventing accidents.

[0015] The control board moves by utilizing the deformation of components in the high-pressure zone when their heat exceeds their coefficient of thermal expansion. This provides a release channel for heat in the low-pressure zone and rapidly heats up the high-pressure zone, achieving orderly heat conduction and step-by-step response. This shortens the pressure relief response time and significantly improves the cabinet's safety protection efficiency. When the temperature inside the cabinet is at normal, the lower control board returns to its original position, causing the upper and lower through holes to misalign, thus separating the high and low pressure zones and preventing interference between the high and low pressure components. The lower control board returns to its original position automatically driven by the cold shrinkage reset of the variable connector, restoring the separation between the high and low pressure zones. No manual intervention is required to restore the cabinet to its normal sealed isolation state, ensuring long-term stable operation. Attached Figure Description

[0016] Figure 1 A schematic diagram of a multi-terminal detection and compensation distribution cabinet from a first-view perspective, provided for an embodiment of the present invention; Figure 2 A plan view of the cabinet door side of a multi-terminal detection and compensation distribution cabinet provided for an embodiment of the present invention, after the cabinet door has been removed; Figure 3 A schematic diagram of a multi-terminal detection and compensation distribution cabinet from a second perspective, provided for an embodiment of the present invention; Figure 4 A multi-terminal detection and compensation distribution cabinet provided for embodiments of the present invention comprises... Figure 2 A diagram illustrating the upward-looking perspective; Figure 5 A schematic diagram of a partially cut-open multi-terminal detection and compensation distribution cabinet provided for an embodiment of the present invention; Figure 6 A schematic diagram from a second perspective showing a partially cut-open multi-terminal detection and compensation distribution cabinet, provided as an embodiment of the present invention; Figure 7 This is a schematic diagram from a third-person perspective of a multi-terminal detection and compensation distribution cabinet partially cut open, as provided in an embodiment of the present invention.

[0017] In the diagram: 1. Cabinet; 2. High-voltage terminal block assembly; 21. Guide tube; 22. High-voltage terminal block; 23. Lower control board; 24. Variable connector; 25. Upper through hole; 26. Lower through hole; 3. Low-voltage terminal block; 4. High-voltage release mechanism; 41. Spring-loaded pressure relief valve; 42. Heat collection pipe; 421. Tubular diameter reducer; 43. Heat collector cover; 44. Lead-in pipe; 5. First detection port; 6. Second detection port; 7. Explosion-proof isolation section; 71. Isolation protection pipe; 711. Explosion-proof accommodating cavity; 72. Explosion-proof overflow hole; 721. Thermal strain gauge; 722. Sealing plate; 8. Low-pressure chamber; 9. High-pressure chamber; 10. Connecting pipe; 101. Guide rod; 11. First assembly rod; 111. First assembly slot; 12. First heat dissipation channel; 13. Second assembly rod; 14. Second heat dissipation channel; 131. Second assembly slot. Detailed Implementation

[0018] The above and other embodiments and advantages 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.

[0019] In one implementation, such as Figures 1-7 As shown: This embodiment provides a multi-terminal detection and compensation distribution cabinet, including a cabinet body 1; a high-voltage terminal block assembly 2, a low-voltage terminal block 3, and a high-voltage release mechanism 4 are fixedly installed inside the cabinet body 1; a first detection port 5 and a second detection port 6 are respectively opened on the back of the cabinet body 1 corresponding to the positions of the high-voltage terminal block assembly 2 and the low-voltage terminal block 3; a high-voltage resistant sealed door is installed at the front of the cabinet body 1; the high-voltage terminal block assembly 2 is used to install high-voltage components, and the low-voltage terminal block 3 is used to install low-voltage components. This method of partitioning high and low voltage components avoids mutual interference between high and low voltage, improves safety, and facilitates the classified connection of high and low voltage circuits and high and low voltage detection terminals.

[0020] The high-voltage terminal block assembly 2 includes guide tubes 21, a high-voltage terminal block 22, a lower control board 23, and a variable connector 24 (high-elasticity silicone expansion seat or rubber expansion tube). Two guide tubes 21 are symmetrically fixed to the side walls of the cabinet 1. The high-voltage terminal block 22 is fixedly connected between the two guide tubes 21. The lower control board 23 is slidably disposed between the two guide tubes 21, with its top surface in sliding contact with the bottom surface of the high-voltage terminal block 22. One variable connector 24... One end is connected to the cavity wall of the cabinet 1, and the other end is connected to one end of the lower control plate 23. The connection position is set along the movement direction of the lower control plate 23. Several upper through holes 25 are evenly distributed on the high voltage terminal plate 22, and several lower through holes 26 are evenly distributed on the lower control plate 23. When the variable connector 24 is in normal state, the lower through holes 26 and the upper through holes 25 are misaligned. When the variable connector 24 is heated and expands, it drives the lower control plate 23 to move, so that the lower through holes 26 and the upper through holes 25 overlap vertically. The cabinet 1 has a pressure relief hole. The high-pressure release mechanism 4 includes a spring-loaded pressure relief valve 41 installed in the pressure relief hole and a heat collection pipe 42 located above the high-pressure terminal block 22 and connected to the spring-loaded pressure relief valve 41. The air inlet of the heat collection pipe 42 faces downward and is located above the high-pressure terminal block 22. Both ends of the heat collection pipe 42 are provided with tubular diameter reducing sections 421. The other end of the tubular diameter reducing section 421 is connected to the cabinet 1. The cabinet 1 has a discharge port corresponding to the tubular diameter reducing section 421. The spring-loaded pressure relief valve 41 is installed inside the tubular diameter reducing section 421.

[0021] When high temperatures occur inside the cabinet 1 (such as due to failure of the heat dissipation structure or component failure), and the high temperature reaches the preset trigger temperature (80℃~120℃) of the variable connector 24, the heat will be quickly transferred to the variable connector 24. Because the variable connector 24 has the characteristics of thermal expansion and contraction, it will expand significantly and lengthen after reaching the preset trigger temperature, thereby generating thrust to push the lower control plate 23 to move smoothly along the guide tube 21 towards the cabinet door. Finally, the lower through hole 26 on the lower control plate 23 and the upper through hole 25 on the high-voltage terminal plate 22 will be aligned vertically. At this time, the high and low pressure areas are connected through the aligned through holes, and the two areas change from being basically separated to being interconnected. The heat in the low pressure area is released to the high pressure area, and the heat in the high pressure area gradually rises with the temperature. It enters the heat collection pipe 42 through the opening of the heat collection pipe 42 in the form of gas release. After being continuously collected and heated by the heat collection pipe 42, it finally acts on the spring-type pressure relief valve 41. The spring-type pressure relief valve 41 opens, and the heat can be released from the inside of the cabinet 1 to the outside. This allows the cabinet 1 to release heat and relieve pressure when a sudden high temperature occurs, even if it is highly sealed. The heat collection pipe, the lead pipe, and the heat collection cover together constitute a closed pressure generation circuit filled with a temperature-sensitive phase change working fluid.

[0022] The heat collection shroud is located above the high-pressure chamber and serves as the evaporation and heat absorption section of the pressure generation circuit. The heat collection tube consists of several parallel metal pipes connected to the heat collection shroud via multiple lead-in pipes. All heat collection tubes, lead-in pipes, and the inner cavity of the heat collection shroud are evacuated at the factory and filled with a liquid phase-change working fluid with a specific boiling point. The spring-loaded pressure relief valve is a diaphragm pressure valve. Its valve core structure includes a pressure-sensing diaphragm, and the pressure-sensing chamber below the diaphragm is connected to the internal cavity of the heat collection tube via a pipe, allowing the pressure-sensing chamber below the diaphragm to sense the working fluid vapor pressure within the pressure-sensing circuit.

[0023] When the temperature of the high-pressure chamber or the mixed hot gas entering through the through-hole rises abnormally, heat is conducted to the liquid phase change working fluid inside through the wall of the heat collection hood. After absorbing heat, the working fluid rapidly boils and vaporizes, its volume expanding dramatically, generating a sudden increase in steam pressure within the closed pressure-sensing circuit. This pressure is conducted through the heat collection pipe to the pressure-sensing diaphragm of the spring-loaded pressure relief valve. When this steam pressure reaches the valve's set pressure, it overcomes the preload of the spring inside the valve, causing the diaphragm to deform and thus opening the valve core, achieving pressure relief. After pressure relief, the pressure in the pressure-sensing circuit decreases, and external cold air enters the cabinet through the spring-loaded pressure relief valve. The steam working fluid in the circuit cools and liquefies, its volume shrinking, and the circuit pressure returns to normal. The valve automatically resets and closes under the action of the spring.

[0024] When the heat released by the high-pressure zone components exceeds the expansion coefficient of the variable connector 24, the lower control plate 23 moves due to expansion and deformation, causing the upper and lower through holes to overlap. This releases the heat released by the low-pressure zone components into the high-pressure zone. This serves two purposes: first, to provide conditions for the release of heat in the low-pressure zone when a risk occurs; and second, to rapidly raise the temperature of the high-pressure zone, triggering the spring-loaded pressure relief valve 41 to open briefly, thus completing the pressure relief and improving security efficiency.

[0025] As the temperature recovers or the safety hazard is eliminated by human intervention, the variable connector 24 shrinks and moves the lower control board 23 back to its original position. The upper and lower through holes are misaligned again, the high and low voltage areas are restored to isolation, and the high and low voltage components in the high and low voltage areas are restored to not interfering with each other.

[0026] Specifically, sealing elements are embedded in the first detection port 5 and the second detection port 6. The first detection port 5 and the second detection port 6 are respectively set for the high and low voltage areas. The high voltage terminal line or high voltage detection line is introduced into the cabinet 1 from the first detection port 5 and electrically connected to the high voltage component on the high voltage terminal board 22. The low voltage terminal line or low voltage detection line is introduced into the cabinet 1 from the second detection port 6 and electrically connected to the low voltage component on the low voltage terminal board 3. The sealing element is an annular sealing ring, the outer ring of which is tightly fixed to the first detection port 5 or the second detection port 6, and the inner ring of which is tightly fitted onto the wire harness to prevent dust from entering and to ensure the sealing of the cabinet 1.

[0027] Specifically, the low-voltage terminal block 3 is located below the lower control board 23, forming a low-voltage chamber 8 between them. The high-voltage terminal block 22 forms a high-voltage chamber 9 between it and the top wall of the cabinet 1. The low-voltage chamber 8 is the installation space for low-voltage components, which are installed on the low-voltage terminal block 3. The high-voltage chamber 9 is the installation space for high-voltage components, which are installed on the high-voltage terminal block 22. This partitioned arrangement of high and low voltage spaces facilitates the separation of high and low voltage components, simplifying maintenance and wiring management. Under energized conditions, both high-voltage and low-voltage components generate heat. However, due to this partitioned arrangement, the lower through-hole 26 on the lower control board 23 and the upper through-hole 25 on the high-voltage terminal block 22 are misaligned in normal operation. The top surface of the lower control board 23 slides against the bottom surface of the high-voltage terminal block 22. The heat from the low-pressure chamber 8 (low-pressure zone) will not enter the high-pressure chamber 9 (high-pressure zone). Regardless of whether the heat released from the high-pressure or low-pressure zone exceeds the expansion coefficient of the variable connector 24, the variable connector 24 will expand. The variable connector 24 will push the lower control plate 23 towards the cabinet door. At this time, not only will the heat from the low-pressure zone enter the high-pressure chamber 9 through the through-hole, but the heat will also urge the heat in the high-pressure chamber 9 to enter the heat collection pipe 42, driving the spring-loaded pressure relief valve 41 to open, completing unified pressure relief. Pressure relief in both zones is completed through a single spring-loaded pressure relief valve 41, saving path space. The variable connector is the core actuator for achieving thermal response drive; it is essentially a thermally sensitive linear actuator. In one embodiment, a metal bellows filled with a specific phase change wax or shape memory alloy (SMA) spring can be used. When the ambient temperature reaches the melting point of the phase change material, its volume expands rapidly, pushing the bellows to elongate axially. This elongation can be precisely calculated and directly converted into the precise displacement of the lower control plate. For connections to the cabinet and control panel, it is recommended to use metal brackets and bearing pins with low thermal resistance to reduce thermal hysteresis.

[0028] Specifically, considering the flexibility of the variable connector 24, its thermal expansion or thermal contraction may cause instability during the movement of the lower control board 23. Therefore, a connecting pipe 10 is provided at the end of each of the two guide tubes 21 furthest from the variable connector 24. Guide rods 101 are fixed to both ends of the connecting pipe 10, and pulleys are installed on both guide rods 101. The two guide rods 101 are inserted into their respective guide tubes 21 and roll in contact with the inner wall of the connecting pipe 10 via the pulleys. The end of the control plate 23 away from the variable connector 24 is fixedly connected to the connecting pipe 10. When the lower control plate 23 moves, it will drive the connecting pipe 10 to move synchronously. The guide rods 101 at both ends of the connecting pipe 10 will drive the pulleys to roll along the cavities of the two guide pipes 21. This ensures that the lower control plate 23 moves smoothly and stably, thereby enabling the lower through hole 26 on the lower control plate 23 to accurately overlap with the upper through hole 25 on the high voltage terminal plate 22, laying the foundation for subsequent high and low voltage zone connection and high heat energy release.

[0029] Specifically, the high-pressure release mechanism 4 also includes a heat collection cover 43 located below the heat collection pipes 42 and fixed inside the cabinet 1. Several heat collection pipes 42 are arranged parallel to each other. Each heat collection pipe 42 has a row of connecting pipes 44 connected to its bottom. The bottom ends of all connecting pipes 44 are vertically downwards and connected to the heat collection cover 43. The opening of the heat collection cover 43 faces downwards, allowing the bottom ends of all connecting pipes 44 to absorb heat from the high-pressure chamber 9. The heat released from the high-pressure chamber 9 is quickly collected by the heat collection cover 43 and then gathered into all the connecting pipes 44. These connecting pipes 44 then send the heat to all the heat collection pipes 42. These heat collection pipes 42 increase the heat collection space, greatly improving safety. Simultaneously, the heated gas is fed back to its corresponding spring-loaded pressure relief valve 41 through these heat collection pipes 42. Heat generated in the low-pressure area due to heat conduction also enters the high-pressure area synchronously through the connected high and low-pressure areas, and is released along the aforementioned path, thereby rapidly reducing the temperature and pressure inside the cabinet 1 and ensuring the safe operation of the distribution cabinet.

[0030] Specifically, several first mounting rods 11 are connected between the two guide tubes 21, and the high-voltage terminal plate 22 is correspondingly disposed below the guide tubes 21; a first heat dissipation cavity 12 is formed between two adjacent first mounting rods 11, and one first heat dissipation cavity 12 corresponds to two rows of upper through holes 25. A first mounting groove 111 is opened on the first mounting rod 11. Several second mounting rods 13 are fixed to the top of the low-voltage terminal plate 3, and a second heat dissipation cavity 14 is formed between two adjacent second mounting rods 13. A second mounting groove 131 is opened on the second mounting rod 13. When the high-voltage component is installed in the high-voltage chamber 9, its bottom surface is mounted on the first mounting rod 11, and screws are installed into the first mounting groove 111 to fix the high-voltage component to the first mounting rod 11. When the low-voltage component is installed in the low-voltage chamber 8, its bottom surface is mounted on the second mounting rod 13, and screws are installed into the second mounting groove 131 to fix the low-voltage component to the second mounting rod 13. The first heat dissipation cavity 12 and the second heat dissipation cavity 14 provide space for heat release at the bottom of the component.

[0031] The invention also includes an explosion-proof isolation section 7, which includes an isolation protection tube 71. An explosion-proof accommodating cavity 711 is formed inside the isolation protection tube. The explosion-proof accommodating cavity is filled with perfluorohexanone. An overflow explosion-proof hole 72 communicating with the explosion-proof accommodating cavity is formed on the high-voltage terminal block 22. A thermal strain section is provided on the overflow explosion-proof hole 72. When heated, the thermal strain section actuates to open the overflow explosion-proof hole. The isolation protection pipe 71 is installed between the two heat collection pipes 42. When the heat is too high, the thermal strain section opens the overflow explosion-proof hole, and the perfluorohexanone agent inside is released instantly. While absorbing the heat in the air, it also prevents combustion and quickly extinguishes the flames. More importantly, the low-pressure area inside is instantly submerged by the perfluorohexanone agent without affecting signal transmission. If combustion occurs in the low-pressure area, the perfluorohexanone agent can act as an isolation agent to prevent damage to the actuators and the expansion of the danger. If combustion occurs in the high-pressure area, the connection caused by the opening of the isolation plate will be instantly isolated by the perfluorohexanone agent to avoid affecting the low-pressure area. This ensures that the final protection control command can continue to be executed, or that communication signals can be sent to the cloud server in a timely manner to ensure timely rescue.

[0032] The thermal strain unit includes a thermal strain gauge 721 and a sealing plate 722. The sensing end of the thermal strain gauge is located at the air inlet of the heat collection pipe 42. The actuating end of the thermal strain gauge 721 forms a puncture needle. The sealing plate 722 is located at the overflow explosion-proof hole 72. When the thermal strain gauge is heated, the sealing plate 722 is destroyed by the puncture needle. Because a large airflow is generated at the heat collection pipe when the heat is high, this high-frequency heat exchange is conducive to the timely triggering of deformation of the thermal strain gauge. The sealing plate is made of a fragile material and can be easily destroyed by the puncture needle, allowing perfluorohexanone to flow out fully and quickly.

[0033] The above orientation references do not represent the specific orientations of each component in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme and to make relative descriptions based on the orientations of the references. In reality, the specific orientations of each component are based on their actual installation and use, as well as the orientation descriptions that are customary to those skilled in the art. This is hereby stated.

[0034] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-terminal detection and compensation distribution cabinet, characterized in that, Includes a cabinet (1); the cabinet (1) is internally fixed with a high-voltage terminal board assembly (2), a low-voltage terminal board (3) and a high-voltage release mechanism (4); the back of the cabinet (1) is provided with a first detection port (5) and a second detection port (6) respectively corresponding to the positions of the high-voltage terminal board assembly (2) and the low-voltage terminal board (3); The high-voltage terminal block assembly (2) includes guide tubes (21), a high-voltage terminal block (22), a lower control board (23), and a variable connector (24). Two guide tubes (21) are symmetrically fixed to the two side walls of the cabinet (1). The high-voltage terminal block (22) is fixedly connected between the two guide tubes (21). The lower control board (23) is slidably disposed between the two guide tubes (21), with the top surface of the lower control board (23) slidingly contacting the bottom surface of the high-voltage terminal block (22). One end of the variable connector (24) is connected to the side wall of the cabinet (1). The cavity wall is connected, and the other end is connected to one end of the lower control plate (23), and the connection position is set along the movement direction of the lower control plate (23). The high voltage terminal plate (22) is evenly provided with several upper through holes (25), and the lower control plate (23) is evenly provided with several lower through holes (26). When the variable connector (24) is in normal state, the lower through holes (26) and the upper through holes (25) are misaligned. When the variable connector (24) is heated and expands, it drives the lower control plate (23) to move, so that the lower through holes (26) and the upper through holes (25) overlap vertically. The cabinet (1) is provided with a pressure relief hole. The high pressure release mechanism (4) includes a spring-loaded pressure relief valve (41) installed in the pressure relief hole and a heat collection pipe (42) located above the high pressure terminal block (22) and connected to the spring-loaded pressure relief valve (41). The air inlet of the heat collection pipe (42) faces downward and is located above the high pressure terminal block (22).

2. The multi-terminal detection and compensation distribution cabinet according to claim 1, characterized in that, The first detection port (5) and the second detection port (6) are fitted with seals.

3. The multi-terminal detection and compensation distribution cabinet according to claim 2, characterized in that, The low-voltage terminal block (3) is located below the lower control board (23) and forms a low-voltage chamber (8) between it and the lower control board (23). The high-voltage terminal block (22) forms a high-voltage chamber (9) between it and the top wall of the cabinet (1).

4. A multi-terminal detection and compensation distribution cabinet according to claim 3, characterized in that, The ends of the two guide tubes (21) away from the variable connector (24) are connected to a connecting tube (10). Guide rods (101) are fixed at both ends of the connecting tube (10). Pulleys are fixed on the two guide rods (101). The two guide rods (101) are inserted into the corresponding guide tubes (21) and roll in contact with the inner wall of the connecting tube (10) through the pulleys. The end of the lower control plate (23) away from the variable connector (24) is connected to the connecting tube (10).

5. A multi-terminal detection and compensation distribution cabinet according to claim 4, characterized in that, The high-pressure release mechanism (4) also includes a heat collection cover (43) corresponding to the bottom of the heat collection pipe (42) and fixed inside the cabinet (1). There are several heat collection pipes (42) arranged in parallel to each other. The bottom of each heat collection pipe (42) is connected to a row of lead pipes (44). The bottom ends of all lead pipes (44) are vertically downward and connected to the heat collection cover (43). The opening of the heat collection cover (43) faces downward, so as to absorb heat from the bottom ends of all lead pipes (44) corresponding to the high-pressure chamber (9).

6. A multi-terminal detection and compensation distribution cabinet according to claim 5, characterized in that, A plurality of first assembly rods (11) are connected between the two guide tubes (21), and the high voltage terminal plate (22) is correspondingly disposed below the guide tubes (21); a first heat dissipation cavity (12) is formed between two adjacent first assembly rods (11), and one first heat dissipation cavity (12) corresponds to two rows of upper through holes (25). A first assembly groove (111) is provided on the first assembly rod (11).

7. A multi-terminal detection and compensation distribution cabinet according to claim 6, characterized in that, The top of the low-voltage terminal block (3) is fixed with several second mounting rods (13), and a second heat dissipation cavity (14) is formed between two adjacent second mounting rods (13). A second mounting groove (131) is provided on the second mounting rod (13).

8. A multi-terminal detection and compensation distribution cabinet according to claim 7, characterized in that, The heat collection pipe (42) has tubular diameter reducing parts (421) at both ends. The other end of the tubular diameter reducing part (421) is connected to the cabinet (1). The cabinet (1) has a discharge port corresponding to the tubular diameter reducing part (421). The spring-loaded pressure relief valve (41) is installed in the tubular diameter reducing part (421) corresponding to the discharge port.

9. A multi-terminal detection and compensation distribution cabinet according to claim 1, characterized in that, It also includes an explosion-proof isolation section (7), which includes an isolation protection tube (71). An explosion-proof accommodating cavity (711) is formed inside the isolation protection tube. The explosion-proof accommodating cavity is filled with perfluorohexanone. An overflow explosion-proof hole (72) communicating with the explosion-proof accommodating cavity is formed on the high-voltage terminal block (22). A thermal strain section is provided on the overflow explosion-proof hole (72). When the thermal strain section is heated, it actuates to open the overflow explosion-proof hole.

10. A multi-terminal detection and compensation distribution cabinet according to claim 9, characterized in that, The thermal strain section includes a thermal strain gauge (721) and a sealing plate (722). The sensing end of the thermal strain gauge is located at the air inlet of the heat collection tube (42). The actuating end of the thermal strain gauge (721) forms a puncture needle. The sealing plate (722) is located at the overflow explosion-proof hole (72). When the thermal strain gauge is heated, the sealing plate (722) is destroyed by the puncture needle.

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