CN112196390A

CN112196390A - High-low voltage electrical switch cabinet

Info

Publication number: CN112196390A
Application number: CN202011027045.XA
Authority: CN
Inventors: 冯杰慧
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 a high-low voltage electrical switch 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, a first inner cavity, a second inner cavity, a first through hole and a second through hole are formed in the protruding edge, the first inner cavity is communicated with the second inner cavity through the 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 sealing mode, one end of the first rotating shaft is provided with a. 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 high-voltage and low-voltage electric switch cabinet.

Description

High-low voltage electrical switch cabinet

Technical Field

The invention relates to the technical field of electrical equipment, in particular to a high-voltage and low-voltage electrical switch cabinet.

Background

The high-low voltage switch cabinet is a device for connecting high-voltage or low-voltage cables as the name implies, a high-voltage cabinet is used by a common power supply station and a substation, the high-voltage cabinet is subjected to voltage reduction by a transformer and then enters a low-voltage cabinet, the low-voltage cabinet enters each power distribution box, and protective devices such as switch breakers and the like are assembled into an integrated electrical device without the inside.

Due to maintenance and cleaning requirements, the doors of the switchgear cabinet need to be opened and closed. However, the cabinet body and the door body of the existing high-low voltage electrical switch cabinet are generally connected through hinges, when the internal elements of the switch cabinet are cleaned or maintained, the cabinet door can automatically rotate or even close, the cleaning and maintenance progress is influenced, and the structure of the cabinet door needs to be improved.

Disclosure of Invention

Based on this, in order to solve the problem that the cabinet door of the existing high-low voltage electric switch cabinet can automatically rotate or even close when being cleaned or maintained, and the cleaning and maintenance progress is influenced, the invention provides a high-low voltage electric switch cabinet, which has the following specific technical scheme:

a high-low voltage electrical switch 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 high-low voltage electrical switch cabinet further comprises a second rotating shaft, a nut column, a first spiral spring, a piston and a push rod, a first inner cavity, a second inner cavity, a first through hole and a second through hole are arranged in the protruding edge, one end of the second rotating shaft is rotatably connected with the side wall of the first inner cavity far away from the cabinet door, the other 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 of the nut column far away from the second rotating shaft, the piston is in sliding sealing connection with the inner wall of the first inner cavity, and the first inner cavity is communicated with the second inner cavity through the first through hole, the piston first inner chamber form a first sealed cavity between the push rod, it has lubricating grease to fill in the first sealed cavity, first coil spring's one end with first inner chamber is kept away from the lateral wall fixed connection of second inner chamber, first coil spring's the other end with the one end fixed connection of push rod, the one end of push rod with the inner wall sliding seal of first through-hole connects, the one end of first pivot stretch into in the second inner chamber and be equipped with the other end assorted draw-in groove of push rod, 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, it has fusible alloy to fill in the second through-hole.

Optionally, high low-voltage electrical switchgear still includes the tool to lock, the tool to lock includes interior lock core, the tool to lock is installed first inner chamber is kept away from in the lateral wall of cabinet door, the one end of second pivot pass through interior lock core with first inner chamber is kept away from the lateral wall of cabinet door rotates and is connected.

Optionally, the lock further includes an outer lock cylinder, a second spiral spring, an outer pin tumbler and an inner pin tumbler, at least one outer pin tumbler hole is formed in the outer lock cylinder, an inner pin tumbler hole matched with the outer pin tumbler hole is formed in the inner lock cylinder, the inner lock cylinder is sleeved in the outer lock cylinder, the second spiral spring and the outer pin tumbler are installed in the outer pin tumbler hole, one end of the second spiral spring is in contact with the side wall of the outer pin tumbler hole far away from the inner lock cylinder, the other end of the second spiral spring is in contact with one end of the outer pin tumbler, and the inner pin tumbler is installed in the inner pin tumbler hole.

Optionally, the high-low voltage electrical switchgear further includes a key matched with the lock.

Optionally, the lock is a pin tumbler lock.

Optionally, the nut column is a press-riveting nut column.

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

Optionally, a rubber handle is arranged on the cabinet door.

Optionally, the lock is made of an aluminum alloy material.

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 the lateral wall in 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 the technical staff to open the cabinet door, clean and maintain the inside electrical component of high-low voltage electrical switchgear. In addition, fusible alloy is filled in the second through hole, when the temperature of the high-low voltage electrical switch cabinet is higher than the melting temperature of the fusible alloy in the second through hole, lubricating grease in the first sealing cavity when the fusible alloy in the second through hole melts flows into the groove from the second through hole, the lubricating grease in the first sealing cavity does not limit the first spiral spring to pull the push rod out of the clamping groove, the push rod is separated from the clamping groove under the elastic action of the first spiral spring, and a technician can rapidly open or close the cabinet door as required without rotating the second rotating shaft, so that the working efficiency is improved.

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 diagram of an overall structure of a high-voltage and low-voltage electrical switch 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 lock structure of a high-low voltage electrical switch cabinet according to an embodiment of the present invention;

fig. 4 is a schematic structural relationship diagram of a third inner cavity, a rubber block, a third coil spring, a top bar and a raised edge of a high-low voltage electrical switch cabinet according to an embodiment of the present invention;

fig. 5 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 a high-low voltage electrical switch 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 second through hole; 22. a first round bar; 23. a top rod; 24. a third coil spring; 25. a rubber block; 26. a third lumen; 27. a groove; 28. a first stopper; 29. a second round bar; 30. 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 fig. 2, a high-low voltage electrical switch 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 high-low voltage electrical switch cabinet further includes a second rotating shaft 4, a nut post 5, a first spiral spring 7, a piston 6, and a push rod 8, a first inner cavity 11, a second inner cavity 12, a first through hole 13, and a second through hole 21 are disposed in the protruding edge 9, one end of the second rotating shaft 4 is rotatably connected to a side wall of the first inner cavity 11 away from the cabinet door 3, the other end of the second rotating shaft 4 extends into the first inner cavity 11 and is threadedly connected to the nut post 5, the piston 6 is fixedly connected to one end of the nut post 5 away from the second rotating shaft 4, the piston 6 is connected with the inner wall of the first inner cavity 11 in a sliding and sealing manner, the first inner cavity 11 is communicated with the second inner cavity 12 through a first through hole 13, a first sealing cavity is formed among the piston 6, the first inner cavity 11 and the push rod 8, lubricating grease is filled in the first sealing cavity, one end of the first spiral spring 7 is fixedly connected with the side wall of the first inner cavity 11 far away from the second inner cavity 12, the other end of the first spiral spring 7 is fixedly connected with one end of the push rod 8, one end of the push rod 8 is connected with the inner wall of the first through hole 13 in a sliding and sealing manner, one end of the first rotating shaft 2 extends into the second inner cavity 12 and is provided with a clamping groove matched with the other end of the push rod 8, one end of the second through hole 21 is communicated with the open groove 10, and the other end of the second through hole 21 is communicated with the side wall of the first through hole 13, the second through hole 21 is filled with a fusible alloy. Specifically, the second through hole 21 is at least partially hermetically filled with a fusible alloy, so that the first through hole 13 is not communicated with the slot 10 when the fusible alloy in the second through hole 21 is not melted.

Because 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, 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 electric elements of high-low voltage electrical switchgear.

In addition, the second through hole 21 is filled with fusible alloy, when the temperature of the high-low voltage electric switch cabinet is higher than the melting temperature of the fusible alloy in the second through hole 21, the lubricating grease in the first sealed chamber melted by the fusible alloy in the second through hole 21 flows from the second through hole 21 into the slot 10 through the first through hole 13, lubricating grease in the first sealing chamber does not limit the first spiral spring 7 to pull the push rod 8 out of the clamping groove any more, the push rod 8 is separated from the clamping groove under the elastic force of the first spiral spring 7, a technician does not need to rotate the second rotating shaft 4, namely, the cabinet door 3 can be opened or closed quickly according to the requirement, namely, the cabinet door 3 of the high-low voltage electric switch cabinet can be opened for heat dissipation or the opened cabinet door 3 of the high-low voltage electric switch cabinet can be closed, so as to achieve the purpose of utilizing the cabinet door 3 to isolate the air in the high-low voltage electrical switch cabinet to extinguish the flame in the cabinet body 1.

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.

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 the inside electrical component of high-low voltage electrical switchgear.

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.

In one embodiment, the nut column 5 is a rivet pressing nut column 5, and the clamping groove is in a cross shape or a regular hexagon shape. Preferably, the cross section of the clamping groove is in a regular hexagon shape. In this way, by rotating the second rotating shaft 4, 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, rubber pads are installed at the bottom of the cabinet body 1 to prevent the high-voltage and low-voltage electrical switch cabinet from sliding and reduce the vibration to which the high-voltage and low-voltage electrical switch cabinet is subjected.

In one embodiment, the push rod 8 is shown as being made of a fusible alloy. The push rod 8 is made of fusible alloy, when an electric circuit fault occurs inside the high-low voltage electric switch cabinet to cause a fire or the heat dissipation inside the high-low voltage electric switch cabinet is poor to cause the temperature inside the cabinet body 1 to be too high, and the temperature of the cabinet body 1 is higher than the melting temperature of the push rod 8, the push rod 8 is heated and melted. At this moment, the push rod 8 no longer restricts the position of first pivot 2 and cabinet door 3, and the technical staff can open cabinet door 3 very conveniently as required and carry out ventilation cooling to high-low voltage electrical switchgear, perhaps close cabinet door 3 to reach the mesh that utilizes cabinet door 3 isolated high-low voltage electrical switchgear inside air and make the inside flame of the cabinet body 1 extinguish.

In one embodiment, the second rotating shaft 4 is made of fusible alloy, when the temperature of the high-voltage and low-voltage electrical switch 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 no longer limit the position of the piston 6, and the push rod 8 can be disengaged 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 heat dissipation operation to high-low voltage electrical switchgear, or the high-low voltage electrical switchgear cabinet door 3 of opening close, isolated 1 inside circulation of air of cabinet body so that inside flame oxygen deficiency extinguishes, and then reach save time, improve work efficiency's purpose.

As shown in fig. 3, in one embodiment, the high-low voltage electrical switch 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 provided in the outer lock cylinder 15, an inner pin hole 20 matching with the outer pin hole 19 is provided 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 a 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 high-low voltage electric switch cabinet also 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 high-low voltage electrical switchgear at will, improve high-low voltage electrical switchgear's security performance. 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 lock is made of an aluminum alloy material, so that the weight of the whole high-low voltage electrical switch cabinet is reduced, and technicians can conveniently move and carry the high-low voltage electrical switch cabinet.

In one embodiment, the lock is a pin tumbler lock.

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

In one of the embodiments, 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 is matched with the second rotating shaft 4 to play a role in double protection. When the temperature of the high-voltage and low-voltage electrical switch cabinet is too high or a fire occurs and the temperature reaches 65 ℃ and the second rotating shaft 4 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 that the push rod 8 is separated from the clamping groove, if the temperature of the high-voltage and low-voltage electrical switch 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. Thus, the push rod 8 made of the fusible alloy material provides a second protection for the high-voltage and low-voltage electrical switch cabinet, and can further ensure that the cabinet door 3 can be opened or closed quickly without rotating the second rotating shaft 4 when the temperature of the high-voltage and low-voltage electrical switch cabinet is too high or a fire occurs.

In addition, use for a long time and the tool to lock corrodes rustingly at high-low pressure electrical switch cabinet, when unable opening high-low pressure electrical switch cabinet through the key, can heat the protruding border 9 of high-low pressure electrical switch cabinet and the relative part of fluting 10, make fusible alloy in the second through-hole 21 melts, makes push rod 8 break away from the draw-in groove under first coil spring 7's elasticity effect to open closed high-low pressure electrical switch cabinet, its simple structure, the design is ingenious, has very big popularization nature. Of course, the closed high-low voltage electric switch cabinet can also be opened by heating the local part of the convex edge, so that the second rotating shaft 4 or the push rod 8 is melted, and the limit of the push rod 8 on the first rotating shaft 2 is contacted.

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 degrees centigrade, the melting temperature of the push rod 8 is 80-90 degrees centigrade, and the melting temperature of the fusible alloy in the second through hole 21 is 90-120 degrees centigrade. Through making push rod 8, second pivot 4 setting by fusible alloy to fill fusible alloy in second through-hole 21, can provide triple protection for high-low voltage electrical switch cabinet. When the temperature of the high-voltage and low-voltage electric switch cabinet reaches the melting temperature of the fusible alloy in the second through hole 21, the second rotating shaft 4 is 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 as to enable the push rod 8 to be separated from the clamping groove, if the temperature of the high-voltage and low-voltage electric switch cabinet continues to rise, the fusible alloy in the second through hole 21 is melted, the second through hole 21 is communicated with the first through hole 13, the lubricating grease in the first sealing chamber flows into the second through hole 21 through the first through hole 13, 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. So, make by fusible alloy through setting up push rod 8, second pivot 4 to pack fusible alloy in second through-hole 21, for high low-voltage electrical switch cabinet provides the third protection in essence, can further ensure when high low-voltage electrical switch cabinet 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 and fig. 5, in one embodiment, the high-low voltage electrical switchgear further includes a first round bar 22, a push bar 23, a third spiral spring 24, and a rubber block 25, a third inner cavity 26 is further disposed in the protruding edge 9, a groove 27 is disposed on a side wall of the slot 10 away from the first rotating shaft 2, the rubber block 25 is slidably connected to the groove 27, one end of the third inner cavity 26 is communicated with the groove 27, one end of the push bar 23 extends into the third inner cavity 26 and is slidably and sealingly connected to a side wall of the third inner cavity 26, the other end of the push bar 23 is fixedly connected to one end of the third spiral spring 24, the other end of the third spiral spring 24 is fixedly connected to a side surface of the rubber block 25 away from the first rotating shaft 2, the first round bar 22 is slidably and sealingly connected to a side wall of the third inner cavity 26 close to the piston 6, just the one end of first round bar 22 stretches into in the third inner chamber 26, the other end of first round bar 22 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 22 is equipped with first stopper 28, form the sealed cavity of second between third inner chamber 26, first round bar 22 and the ejector pin 23, 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 22, the first round bar 22 can be restored to the original position by the rubber block 25 and the third coil spring 24. The first stopper 28 is disposed to prevent one end of the first rod 22 from being located in the third cavity 26 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 22 to the third inner cavity 26 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 that the first round rod 22 moves towards the third inner cavity 26, the first round rod 22 drives the push rod 23 and the third helical spring 24 to approach the first rotating shaft 2 through the lubricating grease in the second sealed cavity, so that the rubber block 25 slides along the groove 27 and is in contact 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 22, the rubber block 25 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 25 and the first rotating shaft 2.

As shown in fig. 4 and 5, in one embodiment, the high-voltage and low-voltage electrical switch cabinet further includes a second round rod 29, the second round rod 29 is connected with the third inner cavity 26 in a sliding and sealing manner near the side wall of the piston 6, one end of the second round rod 29 extends into the third inner cavity 26, the other end of the second round rod 29 extends into the first inner cavity 11 and is located between the first round rod 22 and the inner lock cylinder 14, and a second limit block 30 is disposed on an outer peripheral surface of one end of the second round rod 29. A second round bar 29 is arranged between the first round bar 22 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 29, the ejector rod 23 can be further pushed towards the first rotating shaft 2 by using the lubricating grease in the second sealed chamber, thereby further increasing the elastic force of the third spiral spring 24 and the friction force between the rubber block 25 and the first rotating shaft 2.

In this embodiment, the first round bar 22 and the second round bar 29 are both arc-shaped at one end of the first inner cavity 11.

In the above embodiments, the sizes and dimensions of the components included in the high-voltage and low-voltage electrical switch 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. A high-low voltage electrical switch 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 high-low voltage electrical switch 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, a second inner cavity, a first through hole and a second through hole are arranged in the protruding edge, one end of the second rotating shaft is rotatably connected with the side wall of the first inner cavity far away from the cabinet door, the other 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 of the nut column far away from the second rotating shaft, and the piston is in sliding sealing connection with the inner wall of the first inner cavity, first inner chamber with the second inner chamber is through first through-hole intercommunication, the piston first inner chamber form a first sealed cavity between the push rod, it has lubricating grease to fill in the first sealed cavity, first coil spring's one end with first inner chamber is kept away from the lateral wall fixed connection of second inner chamber, first coil spring's the other end with the one end fixed connection of push rod, the one end of push rod with the inner wall sliding seal of first through-hole connects, the one end of first pivot stretch into in the second inner chamber and be equipped with the other end assorted draw-in groove of push rod, 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, it has fusible alloy to fill in the second through-hole.

2. The high-low voltage electric switch cabinet as claimed in claim 1, further comprising a lock, wherein the lock comprises an internal lock cylinder, the lock is installed in the side wall of the first inner cavity far from the cabinet door, and one end of the second rotating shaft is rotatably connected with the side wall of the first inner cavity far from the cabinet door through the internal lock cylinder.

3. The high-low voltage electrical switch cabinet according to any one of the preceding claims, wherein the lock further comprises an outer lock cylinder, a second spiral spring, an outer pin and an inner pin, the outer lock cylinder is provided with at least one outer pin hole, the inner lock cylinder is provided with an inner pin hole matched with the outer pin hole, the inner lock cylinder is sleeved in the outer lock cylinder, the second spiral spring and the outer pin are installed in the outer pin hole, one end of the second spiral spring is in contact with the side wall of the outer pin hole far away from the inner lock cylinder, the other end of the second spiral spring is in contact with one end of the outer pin, and the inner pin is installed in the inner pin hole.

4. High-low voltage electrical switchgear according to one of the preceding claims, wherein the lock is a tumbler lock.

5. High-low voltage electrical switchgear according to one of the preceding claims, characterized in that it further comprises a key matching said lock.

6. High-low voltage electrical switchgear according to one of the preceding claims, characterized in that said nut studs are clinch nut studs.

7. High-low voltage electrical switchgear according to one of the preceding claims, wherein said slots are cross-shaped or regular hexagonal.

8. A high and low voltage electrical switchgear, according to one of the preceding claims, wherein said cabinet door is provided with a rubber handle.

9. High-low voltage electrical switchgear according to one of the preceding claims, characterized in that said lock is made of aluminium alloy material.

10. A high and low voltage electrical switchgear, as claimed in any one of the preceding claims, wherein the bottom of the cabinet body is fitted with rubber feet.