CN112202068A

CN112202068A - Electric power distribution cabinet

Info

Publication number: CN112202068A
Application number: CN202011027778.3A
Authority: CN
Inventors: 冯林英
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-01-08

Abstract

The invention provides an electrical power distribution cabinet which comprises a cabinet body, a first rotating shaft, a cabinet door, a second rotating shaft, a nut column, a first spiral spring, a piston and a push rod, wherein one side of an opening of the cabinet body is provided with an inward protruding edge, the protruding edge is provided with a groove, a first inner cavity and a second inner cavity are arranged in the protruding edge, the first inner cavity is communicated with the second inner cavity through a first through hole, a first sealing cavity is formed among the piston, the first inner cavity and the push rod, lubricating grease is filled in the first sealing cavity, one end of the first spiral spring is fixedly connected with the side wall of the first inner cavity, the other end of the first spiral spring is fixedly connected with one end of the push rod, one end of the push rod is connected with the inner wall of the first through hole in a sliding and sealing mode, one end of the first. The cabinet door can limit the positions of the first rotating shaft and the cabinet door, so that technicians can conveniently open the cabinet door and clean and maintain the electric elements in the electric power distribution cabinet.

Description

Electric power distribution cabinet

Technical Field

The invention relates to the technical field of electrical equipment, in particular to an electrical power distribution cabinet.

Background

The high-voltage power distribution cabinet can be called as a high-voltage switch cabinet, is an electrical appliance product which is used for power generation, power transmission, power distribution, electric energy conversion and consumption of an electric power system and plays roles of on-off, control or protection and the like, has a voltage grade of 3.6-550 kV, and mainly comprises a high-voltage circuit breaker, a high-voltage isolating switch, a grounding switch, a high-voltage load switch, a high-voltage automatic reclosing and sectionalizing device, a high-voltage operating mechanism, a high-voltage explosion-proof power distribution device, a high-voltage switch cabinet and the.

Due to maintenance and cleaning requirements, the doors of high voltage distribution cabinets need to be opened and closed. But the cabinet body and the door body of present high voltage distribution cabinet all are through hinge connection generally, when cleaning or maintaining high voltage distribution cabinet internal component, the cabinet door can autogiration close even, influences cleanness and maintenance progress, and its structure remains to be improved.

Disclosure of Invention

Based on this, in order to solve the problem that the cabinet door of the existing high-voltage power distribution cabinet can automatically rotate or even close when being cleaned or maintained, and the cleaning and maintenance progress is influenced, the invention provides an electric power distribution cabinet, and the specific technical scheme is as follows:

an electrical power distribution cabinet comprises a cabinet body, a first rotating shaft and a cabinet door, wherein one side of an opening of the cabinet body is provided with an inward protruding edge, the protruding edge is provided with a slot, the cabinet door is rotatably connected with the slot through the first rotating shaft, the electrical power distribution cabinet further comprises a second rotating shaft, a nut column, a first spiral spring, a piston and a push rod, a first inner cavity and a second inner cavity are arranged in the protruding edge, one end of the second rotating shaft extends into the first inner cavity and is in threaded connection with the nut column, the piston is fixedly connected with one end, far away from the second rotating shaft, of the nut column, the piston is in sliding sealing connection with the inner wall of the first inner cavity, the first inner cavity is communicated with the second inner cavity through a first through hole, and a first sealing cavity is formed among the piston, the first inner cavity and the push rod, the lubricating grease is filled in the first sealing cavity, one end of the first spiral spring is far away from the first inner cavity, the side wall of the second inner cavity is fixedly connected, the other end of the first spiral spring is fixedly connected with one end of the push rod, one end of the push rod is connected with the inner wall of the first through hole in a sliding and sealing mode, one end of the first rotating shaft extends into the second inner cavity, a clamping groove matched with the other end of the push rod is formed in the second inner cavity, and the push rod is made of fusible alloy.

Optionally, the electric power distribution cabinet still includes memory spring, spine portion and elastic film, still be equipped with the second through-hole in the protruding border, the one end of second through-hole with the fluting intercommunication, the other end of second through-hole with the lateral wall intercommunication of first through-hole, elastic film's all around edge with the lateral wall sealing connection of the other end of second through-hole, memory spring's one end with the second through-hole is kept away from the lateral wall fixed connection of first through-hole, memory spring's the other end with the one end fixed connection of spine portion, the other end of spine portion is just right elastic film.

Optionally, the spine portion is a cone.

Optionally, the diameter of the bottom surface of the cone is smaller than the diameter of the elastic membrane.

Optionally, the side of the cone is provided with a plurality of notches.

Optionally, a plurality of said notches are parallel to a generatrix of said cone.

Optionally, the melting temperature of the push rod is between 65 degrees celsius and 80 degrees celsius.

Optionally, the clamping groove is in a regular hexagon shape.

Optionally, the bottom of the cabinet body is provided with a rubber foot pad.

One end of the second rotating shaft is rotatably connected with the side wall, far away from the cabinet door, of the first inner cavity, the other end of the second rotating shaft extends into the first inner cavity and is in threaded connection with the nut column, and one end of the nut column is fixedly connected with the piston, so that the piston can be driven to move back and forth along the side wall of the first inner cavity by rotating the second rotating shaft. And first coil spring set up at the lateral wall of first inner chamber with between the one end of push rod, the one end of push rod and the inner wall sliding seal of first through-hole are connected, the one end of first pivot be equipped with the other end assorted draw-in groove of push rod, it has lubricating grease to fill in the first sealed cavity, through the lateral wall round trip movement of drive piston along first inner chamber, can make the push rod slide from top to bottom along the inner wall of first through-hole, and then make the other end card of push rod go into in the draw-in groove or follow break away from in the draw-in groove to prescribe a limit to the position of first pivot and cabinet door, make things convenient for technical staff to open the cabinet door, clean and maintain the inside electrical component of electrical distribution cabinet.

Drawings

The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

Fig. 1 is a schematic view of an overall structure of an electrical distribution cabinet according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic view of an overall structure of a lock of an electrical distribution cabinet according to an embodiment of the present invention;

fig. 4 is a schematic view of a structural relationship among a memory spring, a spike, an elastic membrane and a protruding edge of an electrical distribution cabinet according to an embodiment of the present invention;

fig. 5 is a schematic view of a structural relationship among a third inner cavity, a rubber block, a third coil spring, a top bar and a raised edge of an electrical distribution cabinet according to an embodiment of the present invention;

fig. 6 is a schematic structural relationship diagram of a first limiting block, a second limiting block, a first round bar, a second round bar and a third inner cavity of an electrical distribution cabinet according to an embodiment of the present invention.

Description of reference numerals:

1. a cabinet body; 2. a first rotating shaft; 3. a cabinet door; 4. a second rotating shaft; 5. a nut post; 6. a piston; 7. a first coil spring; 8. a push rod; 9. a raised edge; 10. grooving; 11. a first lumen; 12. a second lumen; 13. a first through hole; 14. an inner lock cylinder; 15. an outer lock cylinder; 16. a second coil spring; 17. an outer pin; 18. an inner marble; 19. an outer bullet hole; 20. an inner bullet hole; 21. a memory spring; 22. a spike portion; 23. an elastic film; 24. a second through hole; 25. a first round bar; 26. a top rod; 27. a third coil spring; 28. a rubber block; 29. a third lumen; 30. a groove; 31. a first stopper; 32. a second round bar; 33. and a second limiting block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.

As shown in fig. 1 and 2, an electrical power distribution cabinet includes a cabinet body 1, a first rotating shaft 2 and a cabinet door 3, wherein a protruding edge 9 protruding inward is disposed on one side of an opening of the cabinet body 1, the protruding edge 9 is provided with a slot 10, the cabinet door 3 is rotatably connected to the slot 10 through the first rotating shaft 2, the electrical power distribution cabinet further includes a second rotating shaft 4, a nut post 5, a first helical spring 7, a piston 6 and a push rod 8, the protruding edge 9 is provided with a first inner cavity 11 and a second inner cavity 12, one end of the second rotating shaft 4 extends into the first inner cavity 11 and is in threaded connection with the nut post 5, the piston 6 is fixedly connected to one end of the nut post 5 far away from the second rotating shaft 4, the piston 6 is in sliding sealed connection with an inner wall of the first inner cavity 11, the first inner cavity 11 is communicated with the second inner cavity 12 through a first through hole 13, piston 6 first inner chamber 11 form a first sealed cavity between the push rod 8, it has lubricating grease to fill in the first sealed cavity, first coil spring 7 one end with first inner chamber 11 keeps away from the lateral wall fixed connection of second inner chamber 12, first coil spring 7 the other end with the one end fixed connection of push rod 8, the one end of push rod 8 with the inner wall sliding seal of first through-hole 13 connects, the one end of first pivot 2 stretch into in the second inner chamber 12 and be equipped with the other end assorted draw-in groove of push rod 8, push rod 8 is made by fusible alloy.

By filling the first sealing chamber with grease, it can be ensured that the piston 6 slides smoothly along the side wall of the first inner cavity 11 and the push rod 8 along the inner wall of the first through hole 13.

One end of the second rotating shaft 4 is rotatably connected with the side wall of the first inner cavity 11 far away from the cabinet door 3, the other end of the second rotating shaft 4 extends into the first inner cavity 11 and is in threaded connection with the nut post 5, and one end of the nut post 5 is fixedly connected with the piston 6, so that the piston 6 can be driven to move back and forth along the side wall of the first inner cavity 11 by rotating the second rotating shaft 4. And first coil spring 7 set up at the lateral wall of first inner chamber 11 with between the one end of push rod 8, the one end of push rod 8 and the inner wall sliding seal of first through-hole 13 are connected, the one end of first pivot 2 be equipped with the other end assorted draw-in groove of push rod 8, it has lubricating grease to fill in the first sealed cavity, through drive piston 6 along the lateral wall round trip movement of first inner chamber 11, can make push rod 8 slide from top to bottom along the inner wall of first through-hole 13, and then make push rod 8's other end card go into among the draw-in groove or follow break away from in the draw-in groove to prescribe a limit to the position of first pivot 2 and cabinet door 3, make things convenient for technical staff to open cabinet door 3, clean and maintain the inside electrical component of electric switch board.

When the other end of the push rod 8 is clamped into the clamping groove, the first spiral spring 7 is in a stretching state, and the elastic force of the first spiral spring can enable the push rod 8 to keep a trend of moving towards the first inner cavity 11. When the second rotating shaft 4 is rotated and the nut stud 5 and the piston 6 are driven to move in a direction away from the first spiral spring 7, the push rod 8 moves towards the first inner cavity 11 under the elastic force of the first spiral spring 7, and the other end of the push rod 8 is separated from the clamping groove. At this moment, open cabinet door 3 to certain angle to rotate first rotation once more, the drive nut post 5 and piston 6 toward being close to first coil spring 7 direction removes, through lubricating grease drive push rod 8 in the first sealed cavity removes toward second inner chamber 12 direction, and then makes push rod 8's the other end card go into in the draw-in groove, can prescribe a limit to the position of cabinet door 3, make things convenient for the technical staff to clean or operation such as maintenance change to the inside electrical component of electrical distribution cabinet.

When the other end of the push rod 8 is clamped into the clamping groove or separated from the clamping groove, the first spiral spring 7 is in a stretching state all the time. When the nut column 5 and the piston 6 are driven to move away from the first spiral spring 7 by rotating the second rotating shaft 4, the push rod 8 always keeps a trend of moving towards the first inner cavity 11 under the elastic force action of the first spiral spring 7, so that the push rod 8 can be smoothly separated from the clamping groove to open the cabinet door 3.

The push rod 8 is made by fusible alloy, works as the switch board is inside to take place electric circuit trouble and the conflagration breaks out or the inside poor heat dissipation of switch board leads to the inside high temperature of the cabinet body 1, just the temperature of the cabinet body 1 is greater than during the melting temperature of push rod 8, the push rod 8 is heated and is melted. At this moment, push rod 8 no longer restricts the position of first pivot 2 and cabinet door 3, and technical staff can open cabinet door 3 very conveniently as required and carry out ventilation cooling to the switch board, perhaps close cabinet door 3 to reach and utilize the isolated switch board inside air of cabinet door 3 and make the mesh that the inside flame of the cabinet body 1 extinguishes.

In one embodiment, the electrical distribution cabinet further includes a memory spring 21, a spike portion 22 and an elastic film 23, a second through hole 24 is further disposed in the protruding edge 9, one end of the second through hole 24 is communicated with the slot 10, the other end of the second through hole 24 is communicated with the side wall of the first through hole 13, the peripheral edge of the elastic film 23 is hermetically connected with the side wall of the other end of the second through hole 24, one end of the memory spring 21 is fixedly connected with the side wall of the second through hole 24 far away from the first through hole 13, the other end of the memory spring 21 is fixedly connected with one end of the spike portion 22, and the other end of the spike portion 22 faces the elastic film 23.

In one embodiment, the spike 22 is a cone, the bottom surface of which is fixedly connected with the other end of the memory spring 21, and the diameter of the bottom surface of the cone is smaller than that of the elastic membrane 23. Thus, after the spike 22 pierces the elastic membrane 23, the grease in the second sealed chamber can smoothly flow into the second through hole 24.

In one embodiment, the surface of the cone is provided with a plurality of notches parallel to the generatrix of the cone. The provision of a plurality of notches in the surface of the cone allows grease in the second seal chamber to flow more rapidly into the second through-hole 24.

In one embodiment, the nut post 5 is a press-riveting nut post 5, and the clamping groove is in a regular hexagon shape. In this way, by rotating the first rotating shaft 2, the nut column 5 and the piston 6 are driven to move toward the first coil spring 7, and then the other end of the push rod 8 is driven to be inserted into the slot, so that the cabinet door 3 can be limited to three angles of 0 degree, 60 degrees, 120 degrees and 180 degrees.

In one embodiment, the bottom of the cabinet body 1 is provided with a rubber pad to prevent the power distribution cabinet from sliding and reduce the vibration of the power distribution cabinet.

In one embodiment, the second rotating shaft 4 is made of fusible alloy, when the temperature of the power distribution cabinet is higher than the melting temperature of the second rotating shaft 4, the second rotating shaft 4 melts, the second rotating shaft 4 and the nut column 5 do not limit the position of the piston 6, and the push rod 8 can be separated from the clamping groove under the elastic force of the first spiral spring 7. So, can avoid when block terminal high temperature or when the conflagration breaks out, need not through rotating second pivot 4, can directly open cabinet door 3 in order to carry out the radiating operation to the switch board, the switch board cabinet door 3 of perhaps opening closes, and isolated cabinet body 1 inside circulation of air is so that inside flame oxygen deficiency extinguishes, and then reaches save time, improves work efficiency's purpose.

As shown in fig. 3, in one embodiment, the electrical power distribution cabinet further includes a lock, the lock includes an inner lock cylinder 14, an outer lock cylinder 15, a second spiral spring 16, an outer pin 17 and an inner pin 18, the lock is installed in a side wall of the first inner cavity 11 away from the cabinet door 3, one end of the second rotating shaft 4 is rotatably connected to the side wall of the first inner cavity 11 away from the cabinet door 3 through the inner lock cylinder 14, at least one outer pin hole 19 is formed in the outer lock cylinder 15, an inner pin hole 20 matched with the outer pin hole 19 is formed in the inner lock cylinder 14, the inner lock cylinder 14 is sleeved in the outer lock cylinder 15, the second spiral spring 16 and the outer pin 17 are installed in the outer pin hole 19, one end of the second spiral spring 16 is in contact with the side wall of the outer pin hole 19 away from the inner lock cylinder 14, the other end of the second coil spring 16 is in contact with one end of the outer pin 17, and the inner pin 18 is mounted in the inner pin hole 20. The electric power distribution cabinet further comprises a key matched with the lock. Utilize key and tool to lock, can close cabinet door 3, prevent that non-technical personnel from opening the switch board at will, improve the security performance of switch board. The lockset is arranged on the side wall of the cabinet door 3 far away from the first cavity, the structure is ingenious and simple, and the angle position of the cabinet door 3 can be well locked.

In one embodiment, the lockset is made of an aluminum alloy material, so that the weight of the whole power distribution cabinet is reduced, and technicians can conveniently move and carry the power distribution cabinet.

In one embodiment, a switch handle is provided on the cabinet door 3 to facilitate the opening and closing of the cabinet door 3 by a technician.

In one embodiment, the second rotating shaft 4 and the push rod 8 are made of fusible alloy, the melting temperature of the second rotating shaft 4 is 65-80 ℃, the melting temperature of the push rod 8 is 80-90 ℃, and the push rod 8 and the second rotating shaft 4 are matched for use and can play a role in double protection. When the second rotating shaft 4 is too high in temperature of the power distribution cabinet or has a fire hazard and the temperature reaches 65 degrees and cannot be melted, or the second rotating shaft 4 is already melted, but the elasticity of the first spiral spring 7 is weakened and is not enough to push the piston 6 to move so as to separate the push rod 8 from the clamping groove, if the temperature of the power distribution cabinet continues to rise, the push rod 8 is heated and melted, and the push rod 8 does not limit the rotation of the cabinet door 3 any more. So, the push rod 8 of being made by the fusible alloy material provides the second for the switch board in essence and protects again, can further ensure when the switch board high temperature or conflagration breaing out, need not to rotate second pivot 4 and can open or close cabinet door 3 fast.

As shown in fig. 4, in one embodiment, the electrical distribution cabinet further includes a memory spring 21, a spike portion 22, and an elastic film 23, a second through hole 24 is further disposed in the protruding edge 9, one end of the second through hole 24 is communicated with the slot 10, the other end of the second through hole 24 is communicated with the side wall of the first through hole 13, the peripheral edge of the elastic film 23 is hermetically connected with the side wall of the other end of the second through hole 24, one end of the memory spring 21 is fixedly connected with the side wall of the second through hole 24 far away from the first through hole 13, the other end of the memory spring 21 is fixedly connected with one end of the spike portion 22, and the other end of the spike portion 22 faces the elastic film 23. Specifically, when the memory spring 21 is heated and elongated, the spike 22 may pierce the elastic membrane 23. The memory spring 21 is made of a CuZnAl memory alloy wire by winding and has a two-way memory effect, and the expansion and contraction temperature is between 90 ℃ and 95 ℃. That is, when the memory spring 21 is heated and the temperature is higher than the stretching temperature, the length thereof is increased, and the sharp portion 22 is pushed to approach the elastic film 23 and pierce the elastic film 23. At this time, the lubricating grease in the first sealing chamber flows into the slot 10 from the broken elastic membrane 23 through the first through hole 13 and the second through hole 24, and the push rod 8 is separated from the slot under the elastic force of the first spiral spring 7. Through setting up memory spring 21, spine portion 22 and elastic film 23, when the switch board high temperature perhaps conflagration breaks out, need not to rotate interior lock core 14 and second pivot 4 through the key, can dispel the heat or close switch board cabinet door 3 that will open in order to open switch board cabinet door 3 to reach and utilize the isolated switch board inside air of cabinet door 3 and make the mesh that the inside flame of the cabinet body 1 extinguishes.

In addition, use for a long time and the tool to lock rusts at the switch board, when unable through the key open switch board, can heat the bulge border 9 of switch board with the relative part of fluting 10 for memory spring 21 is heated the extension, and drive spine portion 22 punctures elastic film 23, and then makes push rod 8 break away from the draw-in groove, with open closed switch board, its simple structure thinks about ingeniously, has very big popularization nature. Of course, it is also possible to open the closed switch cabinet by heating a part of the raised edge, so that the second rotating shaft 4 or the push rod 8 melts, and contacts the limit of the push rod 8 on the first rotating shaft 2.

The memory spring 21, the spine portion 22 and the elastic film 23 are arranged, so that a third protection can be provided for the power distribution cabinet. When the temperature of the power distribution cabinet reaches the stretching temperature of the memory spring 21, the second rotating shaft 4 is already melted, the push rod 8 is not melted, the elasticity of the first spiral spring 7 is weakened and is not enough to push the piston 6 to move through the lubricating grease in the first sealing chamber so that the push rod 8 is separated from the clamping groove, if the temperature of the power distribution cabinet continues to rise, the memory spring 21 is heated and extended, the spine portion 22 pierces the elastic film 23, the lubricating grease in the first sealing chamber flows in, and the limiting effect of the lubricating grease in the first sealing chamber on the movement of the push rod 8 is reduced. Under the action of the elastic force of the first spiral spring 7, the push rod 8 is separated from the clamping groove, and the push rod 8 does not limit the rotation of the cabinet door 3 any more. Thus, the memory spring 21, the spike portion 22 and the elastic film 23 substantially provide a third protection for the power distribution cabinet, so that the cabinet door 3 can be quickly opened or closed without rotating the second rotating shaft 4 when the temperature of the power distribution cabinet is too high or a fire disaster occurs.

As shown in fig. 5 and 6, in one embodiment, the power distribution cabinet further includes a first round rod 25, a plunger 26, a third coil spring 27 and a rubber block 28, a third inner cavity 29 is further disposed in the protruding edge 9, a groove 30 is disposed on a side wall of the slot 10 away from the first rotating shaft 2, the rubber block 28 is connected to the groove 30 in a sliding manner, one end of the third inner cavity 29 is communicated with the groove 30, one end of the plunger 26 extends into the third inner cavity 29 and is connected to a side wall of the third inner cavity 29 in a sliding and sealing manner, the other end of the plunger 26 is fixedly connected to one end of the third coil spring 27, the other end of the third coil spring 27 is fixedly connected to a side surface of the rubber block 28 away from the first rotating shaft 2, the first round rod 25 is connected to a side wall of the third inner cavity 29 close to the piston 6 in a sliding and sealing manner, just the one end of first round bar 25 stretches into in the third inner chamber 29, the other end of first round bar 25 stretches into in the first inner chamber 11 and be located piston 6 with between the interior lock core 14, the peripheral surface of the one end of first round bar 25 is equipped with first stopper 31, form the sealed cavity of second between third inner chamber 29, first round bar 25 and the ejector pin 26, it has lubricating grease to fill in the sealed cavity of second. Specifically, when the push rod 8 is inserted into the slot and the piston 6 is separated from the first round bar 25, the first round bar 25 can be restored to the original position by the rubber block 28 and the third coil spring 27. The first stopper 31 is disposed to prevent one end of the first rod 25 from being located in the third cavity 29 all the time.

When the key is inserted into the internal cylinder 14 of the lock to unlock the lock, the piston 6 can push the first rod 25 to the third inner cavity 29 by rotating the internal cylinder 14 and the second rotating shaft 4, so that the nut column 5 and the piston 6 are close to the second rotating shaft 4 under the action of the second rotating shaft 4. During the process of moving the first round rod 25 to the third inner cavity 29, the first round rod 25 drives the push rod 26 and the third coil spring 27 to approach the first rotating shaft 2 through the lubricating grease in the second sealed cavity, so that the rubber block 28 slides along the groove 30 and contacts with the first rotating shaft 2. In the actual use process, rotate interior lock core 14 earlier for piston 6 moves towards interior lock core 14 direction, and push rod 8 breaks away from with the draw-in groove under the effect of first coil spring 7 elasticity, at this moment, can freely open cabinet door 3 to arbitrary angle. After the door 3 is opened, the inner lock cylinder 14 is rotated continuously in the same direction and the piston 6 is pressed against the first round rod 25, the rubber block 28 is close to the first rotating shaft 2 and the first rotating shaft 2 is tightly contacted, and the position of the door 3 is further limited by the friction force between the rubber block 28 and the first rotating shaft 2.

As shown in fig. 5 and 6, in one embodiment, the power distribution cabinet further includes a second round rod 32, the second round rod 32 is connected with the third inner cavity 29 in a sliding and sealing manner near the side wall of the piston 6, one end of the second round rod 32 extends into the third inner cavity 29, the other end of the second round rod 32 extends into the first inner cavity 11 and is located between the first round rod 25 and the inner lock cylinder 14, and a second limit block 33 is disposed on the outer peripheral surface of one end of the second round rod 32. A second round bar 32 is arranged between the first round bar 25 and the inner lock cylinder 14, and by continuing to rotate the inner lock cylinder 14 and pressing the piston 6 against the second round bar 32, the ejector rod 26 can be further pushed towards the first rotating shaft 2 by using the lubricating grease in the second sealed chamber, further increasing the elastic force of the third helical spring 27 and the friction force between the rubber block 28 and the first rotating shaft 2.

In this embodiment, the first round bar 25 and the second round bar 32 are both arc-shaped at one end of the first inner cavity 11.

In the above embodiment, the sizes and dimensions of the components included in the power distribution cabinet can be adjusted according to actual situations, and are not described herein again.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electric power distribution cabinet comprises a cabinet body, a first rotating shaft and a cabinet door, wherein one side of an opening of the cabinet body is provided with an inward protruding edge, the protruding edge is provided with a slot, the cabinet door is rotatably connected with the slot through the first rotating shaft, and the electric power distribution cabinet is characterized by further comprising a second rotating shaft, a nut column, a first spiral spring, a piston and a push rod, a first inner cavity and a second inner cavity are arranged in the protruding edge, one end of the second rotating shaft extends into the first inner cavity and is in threaded connection with the nut column, the piston is fixedly connected with one end, far away from the second rotating shaft, of the nut column, the piston is in sliding sealing connection with the inner wall of the first inner cavity, the first inner cavity is communicated with the second inner cavity through a first through hole, and a first sealing cavity is formed among the piston, the first inner cavity and the push rod, the lubricating grease is filled in the first sealing cavity, one end of the first spiral spring is far away from the first inner cavity, the side wall of the second inner cavity is fixedly connected, the other end of the first spiral spring is fixedly connected with one end of the push rod, one end of the push rod is connected with the inner wall of the first through hole in a sliding and sealing mode, one end of the first rotating shaft extends into the second inner cavity, a clamping groove matched with the other end of the push rod is formed in the second inner cavity, and the push rod is made of fusible alloy.

2. The electrical distribution cabinet according to claim 1, further comprising a memory spring, a spike portion and an elastic film, wherein a second through hole is further disposed in the protruding edge, one end of the second through hole is communicated with the slot, the other end of the second through hole is communicated with the side wall of the first through hole, the peripheral edge of the elastic film is hermetically connected with the side wall of the other end of the second through hole, one end of the memory spring is fixedly connected with the side wall of the second through hole far away from the first through hole, the other end of the memory spring is fixedly connected with one end of the spike portion, and the other end of the spike portion faces the elastic film.

3. An electrical distribution cabinet according to any one of the preceding claims, wherein said spike is conical.

4. An electrical distribution cabinet according to any of the preceding claims, wherein the diameter of the base of said cone is smaller than the diameter of said elastic membrane.

5. An electrical distribution cabinet according to any one of the preceding claims, wherein the sides of said cone are provided with a plurality of notches.

6. An electrical distribution cabinet according to any one of the preceding claims, wherein a plurality of said notches are parallel to the generatrices of said cone.

7. Electrical switchgear cabinet according to one of the preceding claims, characterized in that said pusher has a melting temperature comprised between 65 ℃ and 80 ℃.

8. An electrical distribution cabinet according to any of the preceding claims, wherein said slots are regular hexagons.

9. An electrical distribution cabinet according to any of the preceding claims, wherein rubber feet are mounted to the bottom of said cabinet body.