Power distribution cabinet with detection structure
By using the linkage structure of the plastic deformation traction rod and the energy storage spring, the problem of rapid pressure relief in the power distribution cabinet during high-temperature faults is solved, achieving a safe and reliable protection effect and reducing operation and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-14
AI Technical Summary
Existing distribution cabinets equipped with detection structures have a safety hazard because they cannot quickly expel the high-heat gas inside when the detection components or electrical faults occur, leading to cabinet explosions.
It adopts a linkage structure of plastic deformation traction rod and energy storage spring. High heat triggers the plastic deformation of the plastic deformation traction rod, which automatically opens the hatch and activates the safety vent, so as to realize the rapid discharge of high heat gas inside the cabinet.
It enables rapid pressure relief and cooling in the event of a high-temperature fault, preventing cabinet explosion accidents, reducing equipment damage, extending the life of detection components, and reducing maintenance difficulty and cost.
Smart Images
Figure CN122393749A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power distribution cabinet technology, and in particular to a power distribution cabinet with a detection structure. Background Technology
[0002] In the power transmission and distribution process, switchboards, as core equipment for power distribution, control, and protection, are widely used in various scenarios such as industrial production, building construction, and power maintenance. With the development of intelligent and sophisticated power equipment, switchboards with detection structures have been widely adopted. In addition to terminal mounting brackets for fixing power terminals, these switchboards are also equipped with detection element mounting assemblies for installing various power detection elements (such as temperature sensors, current sensors, fault detectors, etc.). Through these detection elements, the power parameters and equipment operating status inside the cabinet are monitored in real time, potential power faults are detected in a timely manner, and the safe and stable operation of the switchboard is ensured.
[0003] However, existing distribution cabinets with detection structures still have significant safety hazards. They are unable to cope with sudden high-heat situations caused by problems such as faulty detection components, short circuits, and poor contact inside the cabinet. When the detection components inside the distribution cabinet malfunction or other electrical faults occur, a large amount of heat will be generated, and the internal air pressure will rise rapidly. It is difficult to quickly expel the high-heat gas inside by relying solely on conventional heat dissipation structures. As heat and air pressure continue to accumulate, it is very easy to cause the cabinet to explode. Summary of the Invention
[0004] To address the aforementioned problems, this invention provides a distribution cabinet with a detection structure, comprising a cabinet body; the cabinet body contains a terminal mounting bracket and a detection element mounting assembly; an operation port is provided on the side of the cabinet body, and a door is hinged to the outer end of the operation port; an operation compartment is integrally formed within the operation port, the inner end of the operation compartment communicating with the interior of the cabinet body, and the outer end communicating with the exterior of the cabinet body; the detection element mounting assembly includes a guide seat, a mounting carrier, a plastic-modulated traction rod, and a storage spring; the guide seat is fixed within the operation compartment; the mounting carrier is slidably disposed within the guide seat, its outer end entering the operation port and having an open portion opposite to the door, and its inner end entering the cabinet body and having an upwardly curved closed portion; a traction hole is provided on the closed portion; one end of the plastic-modulated traction rod corresponds to the inner end of the mounting carrier and is fixed. One end of the device extends into and locks into the traction hole on the cavity wall of the cabinet to form a traction force on the mounting carrier; the storage spring is connected between the operating compartment and the inner end of the mounting carrier to provide a reset pulling force to the mounting carrier; a safety vent is provided on the closed part of the mounting carrier, and a controllable opening and closing component is provided in the safety vent; a driving component is provided in the operating compartment. When the inner end of the mounting carrier is locked and pulled by the plastic traction rod, the controllable opening and closing component blocks the safety vent; when the inner end of the mounting carrier is reset to the operating compartment, its outer end impacts the compartment door and automatically opens, and triggers the controllable opening and closing component to open the safety vent through the driving component, thereby allowing the gas in the cabinet to enter the interior of the mounting carrier through the safety vent and be discharged to the outside of the cabinet through the operating port.
[0005] Preferably, a welding nut is fixed to the cavity wall of the cabinet, a first threaded sleeve is fixed to one end of the plastic deformation traction rod, the first threaded sleeve is screwed into the welding nut, and a second threaded sleeve is fixed to the other end of the plastic deformation traction rod. The second threaded sleeve enters the mounting carrier through the traction hole and is screwed into a locking nut.
[0006] Preferably, the plastic deformation traction rod is a fusible bismuth-based alloy rod, with a stress deformation groove formed in its middle section.
[0007] Preferably, the mounting carrier is a rectangular structure with one end open facing the cabinet door, a back plate at the end opposite the cabinet door, and a bottom plate at the bottom. The bottom plate and the back plate are slidably disposed with respect to the cavity wall of the operating compartment, and the back and bottom of the sealed part are seamlessly connected to the back plate and the bottom plate, respectively.
[0008] Preferably, a terminal block is installed inside the cabinet, and electrical terminals are installed on the terminal block. The input end of the electrical terminals is close to the mounting carrier, and the output end is close to the terminal mounting bracket.
[0009] Preferably, the controllable opening and closing component is rotatably connected to the safety vent via a rotating shaft, one end of which extends to the outside of the sealed portion and is fixed with a gear; the driving component is a rack, which is fixed to the cavity wall of the operating chamber along the linear motion direction corresponding to the gear.
[0010] Preferably, a cover plate is fixed inside the cabinet, and the mounting carrier and plastic deformation traction rod are located below the cover plate.
[0011] Preferably, an inclined surface is provided between the bottom of the outer end of the operating port and the bottom of the operating compartment, and the outer end of the inclined surface is inclined downward toward the outer end of the operating port; a stepped portion is provided at the bottom of the operating port, and the top end of the door is rotatably connected to the top end of the operating port through a torsion spring shaft, and the bottom end abuts and fits into the stepped portion.
[0012] The advantages of this invention compared to the prior art are: This invention utilizes the coordinated action of a plastic-deformable traction rod and a storage spring. Without additional power, the high heat generated by an internal cabinet malfunction triggers the plastic deformation of the traction rod, which is then quickly broken by the storage spring. This releases the traction constraint on the mounting carrier, automatically opening the hatch and simultaneously activating the safety vents. This allows heat to escape from the cabinet, preventing cabinet explosions and reducing equipment damage. Compared to existing passive pressure relief structures, this invention offers a faster pressure relief response and more reliable protection. The detection components are mounted on the mounting carrier, which is stably locked in place by the plastic-deformable traction rod. Under normal operating conditions, this provides a solid mounting foundation for the detection components. The hatch prevents the entry of external dust, moisture, and other debris. When the cabinet becomes hot, the open end of the mounting carrier forces the hatch open, simultaneously pushing the detection components towards the outside of the cabinet, achieving rapid heat dissipation, extending the lifespan of the detection components, and allowing them to be moved to a safe environment as quickly as possible. The core components of this invention—the plastic-deformed traction rod, the energy storage spring, the mounting carrier, the hatch, and the controllable opening and closing components—are linked together to complete the safety protection action. This eliminates the need for complex disassembly and debugging, significantly reducing the difficulty and cost of later operation and maintenance. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of a partial cross-section of the back of an embodiment of the present invention; Figure 3 This is a schematic diagram of the removal of the hatch from a side view according to an embodiment of the present invention; Figure 4 This is a schematic diagram from the front view when the cabinet door is removed according to an embodiment of the present invention; Figure 5 The embodiments of the present invention are provided by Figure 4 Enlarged schematic diagram of section B; Figure 6 The embodiments of the present invention are provided by Figure 4 Draw a diagram illustrating the rotation; Figure 7 The embodiments of the present invention are provided by Figure 6 An enlarged schematic diagram of part A is shown.
[0014] In the diagram: 1. Cabinet; 2. Terminal mounting bracket; 3. Detection element mounting assembly; 4. Door; 5. Operating compartment; 6. Guide seat; 7. Mounting carrier; 8. Plastic-deformed traction rod; 9. Storage spring; 10. Enclosed section; 11. Traction hole; 12. Safety vent; 13. Controllable opening and closing component; 14. Drive component; 15. Welding nut; 16. First threaded sleeve; 17. Second threaded sleeve; 18. Locking nut; 19. Stress deformation groove; 20. Back plate; 21. Base plate; 22. Terminal plate; 23. Electrical terminal; 24. Gear; 25. Cover plate; 26. Operating port; 27. Sloping surface; 28. Stepped section; 29. Open section. Detailed Implementation
[0015] 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.
[0016] In one implementation, such as Figures 1-7 As shown: This embodiment provides a power distribution cabinet with a detection structure, including a cabinet body 1; a terminal mounting bracket 2 and a detection element mounting assembly 3 are provided inside the cabinet body 1; an operation port 26 is opened on the side of the cabinet body 1, and a door 4 is hinged to the outer end of the operation port 26. An operation compartment 5 is integrally formed inside the operation port 26, the inner end of the operation compartment 5 communicates with the inside of the cabinet body 1, and the outer end communicates with the outside of the cabinet body 1; the detection element mounting assembly 3 includes a guide seat 6, a mounting carrier 7, a plastic deformation traction rod 8, and a storage spring 9. The guide seat 6 is fixed inside the operation compartment 5, and the mounting carrier 7 is slidably disposed inside the guide seat 6. Its outer end enters the operation port and has an open part 29 opposite to the door 4. Its inner end enters the cabinet body 1 and has an upwardly curved closed part 10. A traction hole 11 is opened on the closed part 10. One end of the plastic deformation traction rod 8 corresponds to the inner end of the mounting carrier 7 and is fixed. One end of the device extends into and locks into the traction hole 11 on the cavity wall of the cabinet 1 to form a traction force on the mounting carrier 7; the storage spring 9 is connected between the operating chamber 5 and the inner end of the mounting carrier 7 to provide a reset pulling force to the mounting carrier 7; a safety vent 12 is provided on the closed part 10 of the mounting carrier 7, and a controllable opening and closing component 13 is provided in the safety vent 12; a drive component 14 is provided in the operating chamber 5. When the inner end of the mounting carrier 7 is locked and pulled by the plastic traction rod 8, the controllable opening and closing component 13 blocks the safety vent 12; when the inner end of the mounting carrier 7 is reset to the operating chamber 5, its outer end impacts the door 4 and automatically opens, and triggers the controllable opening and closing component 13 through the drive component 14 to open the safety vent 12, thereby allowing the gas in the cabinet 1 to enter the interior of the mounting carrier 7 through the safety vent 12 and be discharged to the outside of the cabinet 1 through the operating port.
[0017] Under normal operating conditions, the mounting carrier 7 is locked and pulled by the plastic deformation traction rod 8. Specifically, one end of the plastic deformation traction rod 8 is fixed to the cavity wall of the cabinet 1. After the mounting carrier 7 is pulled towards one end of the plastic deformation traction rod 8 through the sealing part 10, the free end of the plastic deformation traction rod 8 is inserted into the traction hole 11 (locked by a nut), thereby forming a stable traction on the mounting carrier 7. At this time, the energy storage spring 9 is in a stretched and energy-storing state. At the same time, the inner end of the mounting carrier 7 is inside the cabinet 1. The controllable opening and closing part 13 blocks the safety vent hole 12 and forms a heat transfer channel between the sealing part 10 and the cavity wall of the cabinet 1, which collects heat. The plastic deformation traction rod 8 is located in this heat transfer channel. When the heat generated inside the cabinet 1 exceeds the plastic deformation value of the plastic deformation traction rod 8 (above 70°C), it will cause the plastic deformation traction rod 8 to plastically deform until it is pulled off by the traction force, triggering the motion mechanism. This causes the mounting carrier 7 to move the detection element towards the operation port 26, away from the hot zone, thus forming protection. Under normal conditions, the plastic deformation traction rod 8 will not deform and has sufficient strength to ensure continuous traction on the installation carrier 7. Various detection elements installed on the installation carrier 7 are in the detection position and can monitor the internal power parameters and operating status of the cabinet 1 in real time.
[0018] For example, when the cabinet 1 generates high heat due to electrical faults such as detection element failure or circuit short circuit, the high temperature environment will cause the plastic deformation traction rod 8 to undergo plastic deformation. At this time, the energy storage spring 9 releases its stored energy, generates a reset pull force, and quickly pulls off the plastic deformation traction rod 8, thus releasing the traction effect of the plastic deformation traction rod 8 on the mounting carrier 7. Under the reset pull of the storage spring 9, the mounting carrier 7 slides along the guide seat 6 toward the operating port 26. Its outer end gradually moves toward the outside of the operating port 26 and hits the hatch 4, causing the hatch 4 to automatically open around the torsion spring shaft. At the same time, the mounting carrier 7 drives the controllable opening and closing part 13 at its inner end to enter the operating chamber 5. When the controllable opening and closing part 13 moves with the mounting carrier 7 to contact the drive part 14 on the cavity wall of the operating chamber 5, the drive part 14 triggers the controllable opening and closing part 13 to rotate and open the controllable opening and closing part 13 that originally blocked the safety vent hole 12. This allows the inside of the cabinet 1 to form a communication channel with the outside. The high-temperature gas inside the cabinet 1 enters the mounting carrier 7 through the safety vent hole 12 and is then discharged to the outside of the cabinet 1 through the opened operating port 26, achieving rapid depressurization and cooling, and preventing the cabinet 1 from bursting due to heat and gas pressure accumulation. After troubleshooting, the mounting carrier 7 can be manually pushed back to its original position, the plastic transformer traction rod 8 can be replaced, and the sealing part 10 of the mounting carrier 7 can be re-locked and fixed by the plastic transformer traction rod 8. The mounting carrier 7 is then pulled back to the charging state for safety protection. At the same time, the controllable opening and closing part 13 disengages from the driving part 14 and resets to seal the safety vent 12. The hatch 4 closes automatically under the action of the torsion spring shaft, and the power distribution cabinet returns to normal operation.
[0019] It should be further explained that: for example, the safety vent 12 is a round hole, and the controllable opening and closing part 13 is a circular plate, which can be opened and closed by rotating.
[0020] This invention, through its rational design, offers the following specific advantages over existing technologies: By setting up a linkage structure between the plastic deformation traction rod 8 and the storage spring 9, when a high-temperature fault occurs inside the cabinet 1, the high temperature triggers the plastic deformation of the plastic deformation traction rod 8, which is then quickly broken by the storage spring 9. This achieves automatic reset and sliding of the mounting carrier 7, requiring no additional power drive, providing a rapid response, and triggering the pressure relief and cooling action of the cabinet 1 immediately. Through the linkage design between the mounting carrier 7, the door 4, and the controllable opening / closing component 13, the opening of the door and the safety vent 12 are synchronized, allowing the high-temperature gas inside the cabinet 1 to be quickly discharged through the safety vent 12 and the operating port 26, significantly improving the operational safety of the distribution cabinet. Under normal operating conditions, the controllable opening / closing component 13 blocks the safety vent 12, ensuring that heat inside the cabinet is concentrated on the plastic deformation traction rod 8. When the protection action is triggered, the controllable opening / closing component 13 can be opened in conjunction, enabling rapid gas exchange between the inside and outside of the cabinet.
[0021] The core components of this invention (plastic deformation traction rod 8, energy storage spring 9, mounting carrier 7, hatch 4, controllable opening and closing component 13) are linked together, with strong coordination of actions, and complete the safety protection action without complicated disassembly and debugging, which greatly reduces the difficulty and cost of later operation and maintenance.
[0022] Specifically, the cavity wall of the cabinet 1 is fixed (welded) with a welding nut 15, and one end of the plastic-modified traction rod 8 is fixed with a first threaded sleeve 16. The first threaded sleeve 16 is screwed into the welding nut 15, so that the plastic-modified traction rod 8 can be detachably fixed in the cabinet 1. It can withstand the tensile force of the storage spring 9 and the traction force of the plastic-modified traction rod 8, avoiding loosening and falling off during long-term use. Moreover, if the plastic-modified traction rod 8 is broken, it is easy to replace and re-traction.
[0023] The other end of the plastic deformation traction rod 8 is fixed with a second threaded sleeve 17. The second threaded sleeve 17 enters the mounting carrier 7 through the traction hole 11 and is screwed with a locking nut 18 to improve the connection strength between the plastic deformation traction rod 8 and the mounting carrier 7. Only the middle section of the plastic deformation traction rod 8 is left exposed for thermoplastic deformation.
[0024] Specifically, the plastic deformation traction rod 8 is a fusible bismuth-based alloy rod with a stress deformation groove 19 in its middle section. The stress deformation groove 19 is annular, which is equivalent to leaving an annular stress section in the middle section of the plastic deformation traction rod 8. This ensures that the plastic deformation traction rod 8 can undergo plastic deformation at a preset position and be pulled off by the storage spring 9. This avoids uneven deformation of the plastic deformation traction rod 8, failure to break off in time, or the breakage position deviating from the preset position, which would prevent the mounting carrier 7 from sliding normally. This improves the reliability and stability of the entire linkage mechanism.
[0025] Specifically, the mounting carrier 7 is a rectangular structure with one end open to the cabinet door. Opening the cabinet door facilitates the installation of detection components into the mounting carrier 7. The end of the mounting carrier 7 facing away from the cabinet door is provided with a back plate 20, and the bottom is provided with a base plate 21. The base plate 21 and the back plate 20 are slidably arranged with the cavity wall of the operating chamber 5. This serves two purposes: first, to improve the strength of the mounting carrier 7 and meet the load-bearing requirements for component installation; and second, to increase the sliding surface between the mounting carrier 7 and the cavity wall of the guide seat 6, ensuring the stability of the mounting carrier 7 as it slides along the guide seat 6.
[0026] Specifically, a terminal block 22 is installed inside the cabinet 1. Electrical terminals 23 are mounted on the terminal block 22. The input end of the electrical terminals 23 is close to the mounting carrier 7 for electrical connection with the detection element inside the mounting carrier 7. The output end of the electrical terminals 23 is close to the terminal mounting frame 2 for electrical connection with other components (the components being tested) on the terminal mounting frame 2, thus forming a detection circuit between the detection element and the components being tested. In other words, the terminal block 22 acts as a relay station between the detection element and the components being tested. When the mounting carrier 7 is triggered to slide rapidly towards the operating port, an instantaneous traction force quickly separates the electrical wires on the detection element from the input end of the electrical terminals 23, preventing any obstruction to the sliding of the mounting carrier 7 with the detection element due to wiring issues.
[0027] Specifically, the controllable opening and closing component 13 is rotatably connected to the safety vent 12 via a rotating shaft. One end of the rotating shaft extends to the outside of the sealing part 10 and is fixed with a gear 24. The driving component 14 is a rack, which is fixed to the cavity wall of the operating chamber 5 along the linear motion direction corresponding to the gear 24.
[0028] The length and installation position of the rack are matched with the movement trajectory of the gear 24 to ensure that when the mounting carrier 7 drives the controllable opening and closing component 13 and the gear 24 to move into the operating chamber 5, the gear 24 can accurately mesh with the rack (driving component 14). When gear 24 moves with mounting carrier 7 to contact and mesh with rack, as mounting carrier 7 continues to slide, rack exerts force on gear 24, driving gear 24 to rotate around the shaft, which in turn drives controllable opening and closing component 13 to rotate synchronously, causing controllable opening and closing component 13, which originally blocked safety vent 12, to rotate to the open position. Gear 24 is still meshed with rack at this time, ensuring that controllable opening and closing component 13 is self-locked in the open position, thus realizing the opening of safety vent 12. When the fault is cleared and mounting carrier 7 is reset, gear 24 moves in the opposite direction with mounting carrier 7, meshes with rack and rotates in the opposite direction. After gear 24 disengages from rack, controllable opening and closing component 13 rotates back to re-block safety vent 12. At this time, a heat transfer channel is formed between the inner end (closed part 10) of mounting carrier 7 and the cavity wall of cabinet 1, which is used to collect heat to plastic deformation traction rod 8. This structure achieves precise linkage control of the controllable opening and closing element 13 through the meshing transmission of gears and racks. The transmission is smooth and the operation is reliable, avoiding problems such as the controllable opening and closing element 13 not opening in time or failing to reset.
[0029] A cover plate 25 is fixed inside the cabinet 1, and the mounting carrier 7 and the plastic deformation traction rod 8 are located below the cover plate 25. When the heat inside the cabinet 1 is released upward, it is blocked by the cover plate 25, which concentrates the heat release to the location of the plastic deformation traction rod 8, thus accelerating the heat induction of the plastic deformation traction rod 8.
[0030] An inclined surface 27 is provided between the bottom of the outer end of the operating port 26 and the bottom of the operating compartment 5. The outer end of the inclined surface 27 is inclined downward toward the outer end of the operating port 26. A stepped portion 28 is provided at the bottom of the operating port 26. The top of the hatch 4 is rotatably connected to the top of the operating port 26 through a torsion spring shaft, and the bottom end abuts against the stepped portion 28. The inclined surface 27 is the inclined surface at the bottom position of the operating port 26 and the operating compartment 5. Under the restriction of the torsion spring shaft, the hatch 4 is tightly sealed against the operating port 26. At this time, the bottom end of the hatch 4 is tightly against the stepped portion 28. Sealing strips are provided on the edge of the hatch 4 or the edge of the operating port 26 and the stepped portion 28. When the mounting carrier 7 is in a normal state (without colliding with the hatch 4 through the opening portion 29), the hatch 4 is tightly closed on the operating port 26 to prevent rainwater from entering.
[0031] 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.
[0032] 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 power distribution cabinet with a detection structure, characterized in that, The system includes a cabinet (1); the cabinet (1) is equipped with a terminal mounting bracket (2) and a detection element mounting assembly (3); the side of the cabinet (1) has an operating port (26), the outer end of the operating port (26) is hinged with a door (4), and an operating compartment (5) is integrally formed inside the operating port (26). The inner end of the operating compartment (5) communicates with the inside of the cabinet (1), and the outer end communicates with the outside of the cabinet (1); the detection element mounting assembly (3) includes a guide seat (6), a mounting carrier (7), a plastic deformation traction rod (8), and a storage... Force spring (9), the guide seat (6) is fixed in the operating cabin (5), the mounting carrier (7) is slidably disposed in the guide seat (6), its outer end enters the operating port and has an open part (29) opposite to the cabin door (4), its inner end enters the cabinet (1) and has an upwardly curved closed part (10), the closed part (10) has a traction hole (11), one end of the plastic deformation traction rod (8) corresponds to the inner end of the mounting carrier (7) and is fixed to the cavity wall of the cabinet (1), the other One end extends into and locks into the traction hole (11) to form a traction force on the mounting carrier (7); the energy storage spring (9) is connected between the operating cabin (5) and the inner end of the mounting carrier (7) to provide a reset pulling force to the mounting carrier (7); a safety vent (12) is provided on the closed part (10) of the mounting carrier (7), and a controllable opening and closing component (13) is provided in the safety vent (12); a drive component (14) is provided in the operating cabin (5), when the inner end of the mounting carrier (7) When locked and pulled by the plastic traction rod (8), the controllable opening and closing component (13) blocks the safety vent (12); when the inner end of the mounting carrier (7) is reset to the operating cabin (5), its outer end hits the cabin door (4) and automatically opens, and triggers the controllable opening and closing component (13) through the driving component (14) to open the safety vent (12), thereby allowing the gas in the cabinet (1) to enter the interior of the mounting carrier (7) through the safety vent (12) and be discharged to the outside of the cabinet (1) through the operating port.
2. The power distribution cabinet with a detection structure according to claim 1, characterized in that, The cavity wall of the cabinet (1) is fixed with a welding nut (15). One end of the plastic deformation traction rod (8) is fixed with a first threaded sleeve (16). The first threaded sleeve (16) is screwed into the welding nut (15). The other end of the plastic deformation traction rod (8) is fixed with a second threaded sleeve (17). The second threaded sleeve (17) enters the mounting carrier (7) through the traction hole (11) and is screwed with a locking nut (18).
3. The power distribution cabinet with a detection structure according to claim 2, characterized in that, The plastic deformation traction rod (8) is a fusible bismuth-based alloy rod, with a stress deformation groove (19) opened in its middle section.
4. The power distribution cabinet with a detection structure according to claim 3, characterized in that, The mounting carrier (7) is a rectangular structure with one end open to the cabinet door and a back plate (20) on the end opposite to the cabinet door. It has a bottom plate (21) at the bottom. The bottom plate (21) and the back plate (20) are slidably disposed with the cavity wall of the operating chamber (5). The back and bottom of the sealing part (10) are seamlessly connected to the back plate (20) and the bottom plate (21) respectively.
5. A power distribution cabinet with a detection structure according to claim 4, characterized in that, A terminal block (22) is installed inside the cabinet (1). A power terminal (23) is installed on the terminal block (22). The input end of the power terminal (23) is close to the mounting carrier (7), and the output end is close to the terminal mounting frame (2).
6. The power distribution cabinet with a detection structure according to claim 5, characterized in that, The controllable opening and closing component (13) is rotatably connected to the safety vent (12) via a rotating shaft. One end of the rotating shaft extends to the outside of the closed part (10) and is fixed with a gear (24). The driving component (14) is a rack, which is fixed to the cavity wall of the operating chamber (5) along the linear motion direction corresponding to the gear (24).
7. The power distribution cabinet with a detection structure according to claim 6, characterized in that, The cabinet (1) is fixed with a cover plate (25), and the mounting carrier (7) and the plastic deformation traction rod (8) are located below the cover plate (25).
8. The power distribution cabinet with a detection structure according to claim 7, characterized in that, An inclined surface (27) is provided between the bottom of the outer end of the operating port (26) and the bottom of the operating compartment (5). The outer end of the inclined surface (27) is inclined downward toward the outer end of the operating port (26). A stepped portion (28) is provided at the bottom of the operating port (26). The top end of the door (4) is rotatably connected to the top end of the operating port (26) through a torsion spring shaft, and the bottom end abuts and fits into the stepped portion (28).