35kV switch cabinet rear door locking and fastening device

Abstract

The utility model provides a 35kV switch cabinet rear door locking and fastening device, belonging to the technical field of 35kV switch cabinets, comprising a cabinet body and a rear door hinged on the left side of the cabinet body front opening, a locking and fastening mechanism is also provided on the right side of the rear end of the rear door, the locking and fastening mechanism comprises a rotating hole arranged in the middle of the right end of the rear surface of the rear door, a rotating column is rotatably connected in the rotating hole, an elliptical plate is arranged at the rear end of the rotating column, a transmission plate is rotatably connected at the upper and lower ends of the rear surface of the elliptical plate, a vertically symmetrically distributed fixed plate is arranged at the upper and lower ends of the rear surface of the rear door, a sliding lock rod is slidably connected in the sliding hole arranged in the middle of the fixed plate, and the inner end of the sliding lock rod is rotatably connected with the outer end of the transmission plate adjacent to the same side. The utility model ensures that the rear door of the switch cabinet is safely closed and locked under specific conditions through the coordinated work of the locking and fastening mechanism, the locking assembly, and the limit drive assembly, and prevents misoperation or unauthorized access, and multiple locking methods increase the safety of the 35kV switch cabinet.

Description

Technical Field

[0001] The utility model belongs to the technical field of 35kV switch cabinets, and in particular relates to a rear door locking and fastening device for a 35kV switch cabinet. Background Art

[0002] 35kV switchgear is a high-voltage electrical equipment designed for power systems. It is mainly used in the power generation, transmission, distribution, power conversion and consumption of 35 kV voltage level, playing a key role in switching, control or protection. This type of switchgear is usually installed in substations, industrial power facilities or other places where high-voltage power distribution and management are required;

[0003] In order to ensure the safety of 35kV switchgear, it is usually necessary to install interlocking rods, lock plates, etc. on the switch doors to achieve mutual constraints between operating components to ensure the locking of the switch doors. Although the switch doors can be locked, there are still some problems in daily use, which are mainly reflected in two points: First, the safety locking mechanism is too simple and lacks hierarchical protection, so anyone can easily perform the unlocking operation; second, the condition-dependent safety locking function is not integrated, which leads to the possibility that the back door of the switchgear may be improperly opened when specific safety regulations are not met, thereby increasing the risk of misoperation and the possibility of unauthorized access. Utility Model Content

[0004] In view of this, the utility model provides a 35kV switch cabinet rear door locking and fastening device, which can ensure that the switch cabinet rear door is safely closed and locked under specific conditions through the coordinated work of a locking and fastening mechanism, a locking assembly, and a limit drive assembly to prevent misoperation or unauthorized access. Multiple locking methods increase the safety of the 35kV switch cabinet.

[0005] To solve the above technical problems, the utility model provides a 35kV switch cabinet rear door locking and fastening device, including a cabinet body and a rear door hinged on the left side of the cabinet front end opening, a locking and fastening mechanism is also provided on the right side of the rear end of the rear door, the locking and fastening mechanism includes a rotating hole arranged in the middle of the right end of the rear surface of the rear door, a rotating column is rotatably connected in the rotating hole, an elliptical plate is provided at the rear end of the rotating column, a transmission plate is rotatably connected at the upper and lower ends of the rear surface of the elliptical plate, a vertically symmetrically distributed fixing plate is provided at the upper and lower ends of the right side of the rear surface of the rear door, a sliding locking rod is slidably connected in the sliding hole arranged in the middle of the fixing plate, the inner end heads of the sliding locking rod are respectively rotatably connected to the outer end heads of the transmission plate adjacent to the same side, the upper and lower walls of the cabinet body are each provided with locking holes corresponding to the sliding locking rod one by one, a locking assembly for limiting the sliding locking rod is also provided on the right side of the cabinet body, and a limiting driving assembly for driving the rotating column to move is also provided at the front end of the rotating column.

[0006] The locking and fastening mechanism also includes annular plates respectively arranged on the outer ends of the outer arc surfaces of the sliding lock rods. Springs are arranged between the inner end surfaces of the annular plates and the outer side surfaces of the transmission plates adjacent to the same side. The springs are respectively movably sleeved on the outer sides of the sliding lock rods adjacent to the same side.

[0007] The locking assembly includes an electromagnetic push rod vertically symmetrically arranged at the front end of the right side of the upper and lower walls of the cabinet. The outer ends of the sliding lock rods are provided with limit openings. The telescopic ends of the electromagnetic push rods are respectively located in the adjacent limit openings on the same side. The electromagnetic push rods are electrically connected to the single-chip microcomputer on the 35kV switch cabinet.

[0008] The limit drive assembly includes a rectangular groove arranged in the middle of the front end surface of the rotating column, a rectangular cylinder is slidably connected in the rectangular groove, and a rotating plate is provided on the front surface of the rectangular cylinder; the limit drive assembly also includes a spring 2 arranged between the rear wall surface of the rectangular groove and the front wall surface of the rectangular cylinder; the limit drive assembly also includes a groove arranged in the middle of the right side of the front surface of the rear door, the groove is matched with the rotating plate, and an annular evenly distributed limit block is provided at the edge of the rear surface of the rotating plate, and a limit slot hole corresponding to the limit block is provided at the edge of the rear wall surface of the groove.

[0009] A U-shaped handle is arranged in the middle of the front end surface of the rotating plate.

[0010] The beneficial effects of the above technical solution of the utility model are as follows:

[0011] 1. When closing the rear door of the 35kV switch cabinet, the relevant staff pulls the rotating plate outward, and the rotating plate overcomes the elastic force of the second spring and drives the rectangular tube and the limit block to move outward synchronously along the rectangular groove, so that the limit block is separated from the groove. Then the relevant staff rotates the elliptical plate through the rotating plate. When the elliptical plate rotates, it is driven by the transmission plate, and at the same time, with the help of the rebound force of the first spring, the sliding lock rod and the annular plate move outward along the sliding hole on the fixed plate, and finally the end of the sliding lock rod is inserted into the corresponding lock hole on the upper and lower walls of the cabinet to achieve the first physical locking. The design of the groove and the limit block limits the rotating plate. Rotate to avoid misoperation, and then energize the electromagnetic push rod through the single-chip microcomputer on the 35kV switch cabinet, so that the telescopic end of the electromagnetic push rod extends and inserts into the corresponding limit port, implementing secondary electronic locking. Multiple locking methods increase the safety of the 35kV switch cabinet. It can only be unlocked under authorized electrical signals. The device achieves tight locking and reliable unlocking of the rear door through a combination of mechanical and electrical methods. It mainly uses the locking fastening mechanism, locking assembly, and limit drive assembly to work together to ensure that the rear door of the switch cabinet is safely closed and locked under specific conditions to prevent misoperation or unauthorized access.

[0012] 2. When it is necessary to open the back door of the 35kV switch cabinet, the relevant staff must first obtain authorization to open the door, and then cut off the power to the electromagnetic push rod through the single-chip microcomputer on the 35kV switch cabinet. The telescopic rod of the electromagnetic push rod retracts and resets under the action of the built-in spring, so that the telescopic end of the electromagnetic push rod is separated from the limit opening, and then the first electronic lock is released. Then the relevant staff intervenes and pulls the rotating plate outward. The rotating plate overcomes the elastic force of spring 2 and drives the rectangular tube and the limit block to move outward synchronously along the rectangular groove, so that the limit block is separated from the groove. Then the relevant staff rotates the elliptical plate through the rotating plate. When the elliptical plate rotates, it drives the sliding lock rod and the annular plate to overcome the elastic force of spring 1 and move inward along the sliding hole on the fixed plate through the transmission plate, and finally separates the end of the sliding lock rod from the lock hole to achieve unlocking, and then maintains the angle of the rotating plate, and uses the rebound force of spring 2 to drive the rotating plate, the rectangular tube and the limit block to move inward synchronously along the rectangular groove, so that the limit block and the groove are movably plugged, thereby maintaining the unlocked state of the sliding lock rod, without the need for continuous human intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the rear door locking and fastening device of a 35kV switch cabinet of the utility model;

[0014] Figure 2 This is a schematic diagram of the locking and fastening mechanism structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the enlarged structure of point A of the utility model;

[0016] Figure 4 It is a schematic diagram of the enlarged structure of point B of the utility model.

[0017] Explanation of the reference numerals in the accompanying drawings: 100, cabinet; 200, rear door; 300, rotating column; 301, elliptical plate; 302, transmission plate; 303, fixed plate; 304, sliding locking rod; 305, locking hole; 306, annular plate; 307, spring one; 400, electromagnetic push rod; 401, limiting opening; 500, rectangular groove; 501, rectangular cylinder; 502, rotating plate; 503, spring two; 504, groove; 505, limiting block. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the following will be combined with the appended drawings of the embodiment of the utility model. Figure 1-4 , the technical scheme of the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0019] like Figure 1-4 As shown:

[0020] The present embodiment provides a 35kV switch cabinet rear door locking and fastening device, including a cabinet body 100 and a rear door 200 hinged to the left side of the front end opening of the cabinet body 100, a locking and fastening mechanism is also provided on the right side of the rear end of the rear door 200, the locking and fastening mechanism includes a rotating hole arranged in the middle of the right end of the rear surface of the rear door 200, a rotating column 300 is rotatably connected in the rotating hole, an elliptical plate 301 is provided at the rear end of the rotating column 300, a transmission plate 302 is rotatably connected to the upper and lower ends of the rear surface of the elliptical plate 301, a vertically symmetrically distributed fixing plate 303 is provided at the upper and lower ends of the right side of the rear surface of the rear door 200, a sliding locking rod 304 is slidably connected in the sliding hole arranged in the middle of the fixing plate 303, and the inner part of the sliding locking rod 304 is The side end heads are rotatably connected to the outer end heads of the transmission plate 302 adjacent to the same side, and the right sides of the front ends of the upper and lower walls of the cabinet 100 are provided with lock holes 305 corresponding to the sliding lock rods 304. The right side of the cabinet 100 is also provided with a locking assembly for limiting the sliding lock rod 304, and the front end of the rotating column 300 is also provided with a limiting driving assembly for driving the rotating column 300 to move; the locking and fastening mechanism also includes annular plates 306 respectively arranged on the outer ends of the outer arc surfaces of the sliding lock rods 304, and a spring 307 is arranged between the inner end surface of the annular plate 306 and the outer side surface of the transmission plate 302 adjacent to the same side, and the spring 307 is respectively movably sleeved on the outside of the sliding lock rods 304 adjacent to the same side.

[0021] like Figure 2-4 As shown, the locking assembly includes an electromagnetic push rod 400 vertically symmetrically arranged at the front end of the right side of the upper and lower walls of the cabinet 100, and a limit opening 401 is provided at the outer end of the sliding lock rod 304. The telescopic ends of the electromagnetic push rod 400 are respectively located in the adjacent limit openings 401 on the same side, and the electromagnetic push rod 400 is electrically connected to the single-chip microcomputer on the 35kV switch cabinet.

[0022] like Figure 1-3 As shown, the limit drive assembly includes a rectangular groove 500 arranged in the middle of the front end surface of the rotating column 300, a rectangular tube 501 is slidably connected in the rectangular groove 500, and a rotating plate 502 is provided on the front surface of the rectangular tube 501; the limit drive assembly also includes a spring 503 arranged between the rear wall surface of the rectangular groove 500 and the front wall surface of the rectangular tube 501; the limit drive assembly also includes a groove 504 arranged in the middle of the right side of the front surface of the rear door 200, the groove 504 is matched with the rotating plate 502, and the edge of the rear surface of the rotating plate 502 is provided with an annular evenly distributed limit block 505, and the edge of the rear wall surface of the groove 504 is provided with a limit slot hole corresponding to the limit block 505 one by one.

[0023] The working principle of the 35kV switch cabinet rear door locking and fastening device provided by the utility model is as follows: when it is necessary to open the 35kV switch cabinet rear door 200, the relevant staff must first obtain the authorization to open the door, and then cut off the power to the electromagnetic push rod 400 through the single-chip microcomputer on the 35kV switch cabinet, and the telescopic rod of the electromagnetic push rod 400 retracts and resets under the action of the built-in spring, so that the telescopic end of the electromagnetic push rod 400 is separated from the limit opening 401, thereby releasing the first electronic lock, and then the relevant staff intervenes to pull the rotating plate 502 outwards, and the rotating plate 502 overcomes the elastic force of the spring 503 and drives the rectangular tube 501 and the limit block 505 to move outward synchronously along the rectangular groove 500, so that the limit block 505 and the groove 501 are separated. 04 is separated, and then the relevant staff rotates the elliptical plate 301 through the rotating plate 502. When the elliptical plate 301 rotates, the transmission plate 302 drives the sliding lock rod 304 and the annular plate 306 to overcome the elastic force of the spring 1 307 and move inward along the sliding hole on the fixed plate 303, so that the end of the sliding lock rod 304 is separated from the lock hole 305 to achieve unlocking, and then the angle of the rotating plate 502 is maintained, and the rebound force of the spring 2 503 is used to drive the rotating plate 502, the rectangular tube 501 and the limit block 505 to move inward along the rectangular groove 500 synchronously, so that the limit block 505 is movably plugged with the groove 504, thereby maintaining the unlocked state of the sliding lock rod 304, without continuous human intervention, when the 35 is closed. When the rear door 200 of the kV switch cabinet is opened, the relevant staff pulls the rotating plate 502 outward, and the rotating plate 502 overcomes the elastic force of the spring 2 503 and drives the rectangular tube 501 and the limit block 505 to move outward synchronously along the rectangular groove 500, so that the limit block 505 is separated from the groove 504. Then the relevant staff rotates the elliptical plate 301 through the rotating plate 502. When the elliptical plate 301 rotates, it is driven by the transmission plate 302, and at the same time, with the help of the rebound force of the spring 1 307, the sliding lock rod 304 and the annular plate 306 move outward along the sliding hole on the fixed plate 303, and finally the end of the sliding lock rod 304 is inserted into the lock hole 305 correspondingly set on the upper and lower walls of the cabinet 100, so as to realize physical locking. The design of the groove 504 and the limit block 505 limits the rotation of the rotating plate 502 to avoid misoperation. Then, the electromagnetic push rod 400 is energized through the single-chip microcomputer on the 35kV switch cabinet, so that the telescopic end of the electromagnetic push rod 400 extends and is inserted into the corresponding limit opening 401, implementing secondary electronic locking. Multiple locking methods increase the safety of the 35kV switch cabinet. It can only be unlocked under authorized electrical signals. The device achieves tight locking and reliable unlocking of the rear door through a combination of mechanical and electrical methods. It mainly uses the locking fastening mechanism, locking assembly, and limit drive assembly to work together to ensure that the rear door of the switch cabinet is safely closed and locked under specific conditions to prevent misoperation or unauthorized access.

[0024] like Figure 1-3As shown, a U-shaped handle is provided in the middle of the front end surface of the rotating plate 502, and the U-shaped handle is convenient for relevant staff to operate.

[0025] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. 35kV switch cabinet rear door locking and fastening device, characterized by: The cabinet comprises a cabinet body (100) and a rear door (200) hinged to the left side of the front opening of the cabinet body (100); a locking and fastening mechanism is further provided on the right side of the rear end of the rear door (200); the locking and fastening mechanism comprises a rotating hole provided in the middle of the right end of the rear surface of the rear door (200); a rotating column (300) is rotatably connected in the rotating hole; an elliptical plate (301) is provided at the rear end of the rotating column (300); a transmission plate (302) is rotatably connected to the upper and lower ends of the rear surface of the elliptical plate (301); and a fixing plate (302) distributed vertically symmetrically is provided on the upper and lower ends of the right side of the rear surface of the rear door (200). 03), a sliding lock rod (304) is slidably connected in the sliding hole arranged in the middle of the fixed plate (303), and the inner end of the sliding lock rod (304) is rotatably connected to the outer end of the transmission plate (302) adjacent to the same side, and the right sides of the front ends of the upper and lower walls of the cabinet (100) are provided with lock holes (305) corresponding to the sliding lock rod (304) one by one, and the right side of the cabinet (100) is also provided with a locking component for limiting the sliding lock rod (304), and the front end of the rotating column (300) is also provided with a limiting drive component for driving the rotating column (300) to move.

2. The 35kV switch cabinet rear door locking and fastening device according to claim 1, characterized in that: The locking and fastening mechanism also includes an annular plate (306) respectively arranged on the outer end of the outer arc surface of the sliding lock rod (304), and a spring (307) is provided between the inner end surface of the annular plate (306) and the outer side surface of the transmission plate (302) adjacent to the same side, and the spring (307) is movably sleeved on the outside of the sliding lock rod (304) adjacent to the same side.

3. The 35kV switch cabinet rear door locking and fastening device according to claim 1, characterized in that: The locking assembly comprises an electromagnetic push rod (400) vertically symmetrically arranged at the front end of the right side of the upper and lower walls of the cabinet (100); the outer end of the sliding lock rod (304) is provided with a limit opening (401); the telescopic ends of the electromagnetic push rod (400) are respectively located in the limit openings (401) adjacent to each other on the same side; and the electromagnetic push rod (400) is electrically connected to a single chip microcomputer on the 35kV switch cabinet.

4. The 35kV switch cabinet rear door locking and fastening device according to claim 1, characterized in that: The limit drive assembly comprises a rectangular groove (500) arranged in the middle of the front end surface of the rotating column (300), a rectangular tube (501) is slidably connected in the rectangular groove (500), and a rotating plate (502) is provided on the front surface of the rectangular tube (501).

5. The 35kV switch cabinet rear door locking and fastening device according to claim 4, characterized in that: The limit drive assembly further comprises a second spring (503) arranged between the rear wall surface of the rectangular groove (500) and the front wall surface of the rectangular tube (501).

6. The 35kV switch cabinet rear door locking and fastening device according to claim 4, characterized in that: The limit drive assembly also includes a groove (504) arranged in the middle of the right side of the front surface of the rear door (200), the groove (504) is arranged in cooperation with the rotating plate (502), the edge of the rear surface of the rotating plate (502) is provided with annular evenly distributed limit blocks (505), and the edge of the rear wall surface of the groove (504) is provided with limit slot holes corresponding to the limit blocks (505) one by one.

7. The 35kV switch cabinet rear door locking and fastening device according to claim 4, characterized in that: A U-shaped handle is provided in the middle of the front end surface of the rotating plate (502).

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