Grounding interlocking mechanism for high-voltage switch cabinet

Abstract

The utility model relates to the technical field of switch cabinets, in particular to a grounding interlocking mechanism for a high-voltage switch cabinet, which is mounted and used on a frame of the switch cabinet, at least one front door and one rear door are hinged to two opposite sides of the frame, the interlocking mechanism comprises a grounding switch transmission shaft and a flat shaft which are movably connected through a limiting assembly, and the flat shaft is connected with the grounding switch transmission shaft. The limiting assembly has an unlocking state and a locking state. Compared with a traditional method, according to the technical scheme, interlocking is achieved between the rear door of the switch cabinet and the grounding switch, the limiting assembly is adjusted by opening and closing the rear door, when the rear door is closed, a transmission shaft of the grounding switch can rotate, a worker can operate the grounding switch, and the rear door cannot be opened in the operation process of the grounding switch; when the grounding switch is operated, the transmission shaft of the grounding switch rotates and resets, and the rear door can be opened, thereby ensuring that the rear door is in a safe closed state during the operation process of the grounding switch and avoiding accidents.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinets, in particular to a grounding interlocking mechanism for a high-voltage switch cabinet. Background Art

[0002] Switch cabinet is an electrical equipment that controls the opening and closing of various equipment. The interlocking mechanism of the grounding switch and the switch cabinet grounding switch is designed to meet the "five protection" requirements of the switch cabinet, "preventing accidental entry into the live interval". Its function is: when the staff operates the grounding switch, when the grounding switch is closed, the cabinet door can be opened and personnel can enter for maintenance; when the cabinet door is opened, the grounding switch cannot be opened; when the cabinet door is closed, the grounding switch can be opened, which can effectively prevent maintenance personnel from accidentally entering the live interval.

[0003] The patent document with patent publication number: CN108878190A discloses a grounding switch and switch cabinet door interlocking mechanism, which realizes that the grounding switch can only be operated when the cabinet door is closed, and the cabinet door cannot be opened when the grounding switch is open, and the cabinet door can be opened when the grounding switch is closed.

[0004] The switch cabinet has both a front door and a rear door. Before operating the grounding switch, you need to ensure that the front and rear doors of the switch cabinet are closed. Since the front door is generally facing the staff, it is easy to confirm whether the front door is opened or closed. However, the rear door is easily forgotten during work, so there are safety hazards when operating the grounding switch. Utility Model Content

[0005] In order to overcome the above technical problems, the purpose of the utility model is to provide a grounding interlocking mechanism for a high-voltage switch cabinet, which solves the problem of lack of interlocking interaction between the rear door of the current switch cabinet and the grounding switch, and the existence of safety hazards when the staff operates the grounding switch.

[0006] The purpose of the utility model can be achieved by the following technical solutions: a grounding interlocking mechanism for a high-voltage switch cabinet, which is installed and used on a frame of the switch cabinet, wherein at least one front door and one rear door are hinged on opposite sides of the frame, the interlocking mechanism comprises a grounding switch transmission shaft and a flat shaft, which are movably connected by a limit assembly, and the limit assembly has two states of unlocking and locking, the grounding switch transmission shaft extends toward the front door, and the flat shaft extends toward the rear door; a fixing piece is arranged at a position of the frame near the rear door, the flat shaft moves horizontally about the fixing piece, and the two are elastically connected by a spring, one end of the flat shaft near the rear door is rotatably connected with a hook, a limit rod is connected to the inner wall of the rear door corresponding to the position of the hook, and a limit slot is provided at the limit rod, when the rear door is rotated to close, the limit rod abuts and pushes the end of the flat shaft to make it move horizontally toward the front door, and the hook is engaged with the limit slot after rotating a certain angle, at this time, the rear door is in a locked state, the limit assembly is in an unlocked state, and the grounding switch transmission shaft can rotate normally.

[0007] Furthermore, the grounding switch transmission shaft and the flat shaft are both installed close to the inner wall of the frame, thus saving space inside the switch cabinet.

[0008] Furthermore, the frame is provided with a limiting member corresponding to the position where the flat shaft moves forward and backward, and the limiting member is provided with a sliding groove which is slidably sleeved with the flat shaft, and the sliding groove is used to increase the stability of the flat shaft during movement.

[0009] Furthermore, the limit assembly includes a rotating member sleeved and fixed on the surface of the earthing switch transmission shaft and a limit block fixedly connected to one side of the flat shaft, the side of the rotating member facing the front door is an abutment surface, and a slot is also provided on the surface of the rotating member, the contour of the slot matches the end contour of the limit block; when the earthing switch is turned on, the rear door is closed, and the flat shaft drives the limit block to move toward the front door as a whole, at which time the limit block is disengaged from the slot, and the hook is engaged with the limit slot, and the rotating member can rotate synchronously with the earthing switch transmission shaft normally, and the limit block continues to abut against the abutment surface under the restraint of the spring; when the earthing switch is turned off, the rotating member rotates and resets, and the flat shaft drives the limit block to move toward the rear door as a whole under the restraint of the spring, and the limit block is re-engaged with the slot, and the hook is disengaged from the limit slot, and at this time the rear door can be opened normally.

[0010] Furthermore, a chamfered surface is formed at a position where the limiting block contacts the abutting surface.

[0011] Furthermore, a bent rod is connected to one end of the flat shaft close to the rear door, and the bent rod is connected to the hook via a sliding rod, and the spring is arranged between the bent rod and the fixing member; the fixing member is provided with an extension portion corresponding to the position of the hook, and when the rear door is in an open state, the hook naturally rotates and falls under the action of gravity and abuts against the extension portion, and when the rear door is in a closed state, the limit rod pushes the sliding rod and drives the flat shaft as a whole to move toward the front door, and the hook abuts against the extension portion during the movement and engages with the limit groove after rotating upward, at which time the grounding switch inside the switch cabinet can be operated.

[0012] Furthermore, the sliding rod is slidably connected to the fixing member, and a positioning ring is provided on the surface of the fixing member corresponding to the position where the sliding rod is inserted, and the positioning ring is a cylindrical structure. The sliding rod passes through the middle of the positioning ring, and the diameter of the curved rod is larger than the positioning ring. When the curved rod abuts against the positioning ring, the sliding rod cannot move further.

[0013] Furthermore, the limiting groove is located at the lower end of the limiting rod, the horizontal height of the hook is lower than the limiting rod, and the inner diameter of the limiting groove is larger than the hook, that is, when there is no external force constraint, the hook can naturally rotate and fall and disengage from the limiting groove.

[0014] Furthermore, the frame is provided with an opening corresponding to the position of the limit rod. When the rear door is closed, the limit rod is inserted into the switch cabinet from the opening. In the closed state, there is a certain opening and closing interval between the rear door and the frame, leaving space for the subsequent opening of the rear door.

[0015] The beneficial effects of the utility model are as follows: compared with the traditional method, the technical scheme achieves an interlock between the rear door of the switch cabinet and the grounding switch, and adjusts the limit assembly by opening and closing the rear door, so that when the rear door is closed, the grounding switch transmission shaft can rotate and the staff can operate the grounding switch. During the operation of the grounding switch, the rear door cannot be opened. When the grounding switch is closed, the grounding switch transmission shaft rotates and resets, and the rear door can be opened at this time, ensuring that the rear door is in a safe closed state during the operation of the grounding switch to avoid accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 This is the main view of the utility model installed and used on the frame;

[0018] Figure 2 It is a three-dimensional view of the utility model installed and used on a frame;

[0019] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0020] Figure 4 It is a three-dimensional view of the driving shaft, flat shaft, limiter and limiter assembly of the grounding switch in the utility model;

[0021] Figure 5 It is a back view of the driving shaft, flat shaft and limiter of the grounding switch in the utility model;

[0022] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle (a schematic diagram of the position of the pull hook and the limit rod when the rear door is open);

[0023] Figure 7 It is a three-dimensional view of the curved rod, sliding rod, draw hook, fixing member and limit rod in the utility model (a schematic diagram of the position of the draw hook and the limit rod when the rear door is open);

[0024] Figure 8 It is a three-dimensional view of the flat shaft, the curved rod, the sliding rod and the draw hook in the utility model;

[0025] Fig. 9 It is a side view of the rotating member, the flat shaft and the limit block in the utility model in the use state;

[0026] Fig.10 It is a three-dimensional view of the rotating part in the utility model.

[0027] In the figure: 1. frame; 11. opening; 2. earthing switch transmission shaft; 21. rotating member; 22. abutting surface; 23. slot; 3. flat shaft; 31. curved rod; 32. sliding rod; 33. spring; 34. hook; 35. limit block; 4. limit member; 5. limit assembly; 6. fixing member; 61. extension part; 62. positioning ring; 7. limit rod; 71. limit slot. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, a grounding interlocking mechanism for a high-voltage switch cabinet is installed and used on a frame 1 of the switch cabinet. At least a front door and a rear door are hinged on two opposite sides of the frame 1. The interlocking mechanism includes a grounding switch transmission shaft 2 and a flat shaft 3, which are movably connected through a limit assembly 5. The limit assembly 5 has two states, unlocked and locked. The grounding switch transmission shaft 2 extends toward the front door, and the flat shaft 3 extends toward the rear door.

[0030] like Figure 1 , Figure 2 , Figure 3 As shown, a fixing member 6 is provided at a position of the frame 1 near the rear door, and the flat shaft 3 moves horizontally in the front-rear direction about the fixing member 6, as shown in FIG. Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, a bent rod 31 is connected to one end of the flat shaft 3 close to the rear door, the bent rod 31 is connected to the hook 34 through a sliding rod 32, the sliding rod 32 is slidably sleeved with the fixing member 6, and a spring 33 is also connected between the bent rod 31 and the fixing member 6, so that the flat shaft 3 as a whole always moves toward the rear door under the restraining action of the spring 33.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 As shown, the inner wall of the rear door is connected to the position of the hook 34, and a limiting groove 71 is provided at the limiting rod 7. When the rear door and the frame 1 are rotated at a certain angle to close, the limiting rod 7 will abut and push the sliding rod 32 and drive the flat shaft 3 to move horizontally toward the front door as a whole. Figure 6 , Figure 7 , Figure 8 As shown, an extension portion 61 is provided at the position of the fixing member 6 corresponding to the hook 34. When the rear door is in the open state, the hook 34 naturally rotates and falls under the action of gravity and abuts against the extension portion 61. When the rear door is in the closed state, the limit rod 7 pushes the slide rod 32 and drives the flat shaft 3 to move toward the front door as a whole. The hook 34 abuts against the extension portion 61 during the movement and engages with the limit groove 71 after rotating up a certain angle. After being fully engaged, the rear door is in a locked state. The rear door cannot be opened due to the engagement between the hook 34 and the limit groove 71. At the same time, the limit assembly 5 is in an unlocked state, and the grounding switch transmission shaft 2 can rotate normally. At this time, the staff can operate the grounding switch inside the switch cabinet.

[0032] In this embodiment, the slide rod 32 is slidably connected to the fixing member 6, and a positioning ring 62 is provided on the surface of the fixing member 6 corresponding to the position where the slide rod 32 is inserted. The positioning ring 62 is a cylindrical structure, and the slide rod 32 passes through the middle of the positioning ring 62. The diameter of the curved rod 31 is larger than the positioning ring 62. When the curved rod 31 abuts against the positioning ring 62, the slide rod 32 cannot move further at this time. If the slide rod 32 drives the flat shaft 3 to move further toward the rear door, the rear door will encounter greater resistance when closing, which is inconvenient to use.

[0033] In this embodiment, the limit groove 71 is located at the lower end of the limit rod 7, the horizontal height of the hook 34 is lower than the limit rod 7, and the inner diameter of the limit groove 71 is larger than the hook 34, that is, when there is no external force constraint, the hook 34 can naturally rotate and fall and disengage from the limit groove 71; in this embodiment, the frame 1 is provided with an opening 11 at the position corresponding to the limit rod 7. When the rear door is closed, the limit rod 7 is inserted into the switch cabinet from the opening 11. When the rear door is closed, there is a certain amount of opening and closing interval between the rear door and the frame 1, leaving room for the subsequent opening of the rear door.

[0034] like Figure 1 , Figure 4 , Fig. 9 , Fig.10 As shown, the limit assembly 5 includes a rotating member 21 which is sleeved and fixed on the surface of the earthing switch transmission shaft 2 and a limit block 35 fixedly connected to one side of the flat shaft 3. The side of the rotating member 21 facing the front door is the abutment surface 22. A slot 23 is also provided on the surface of the rotating member 21. The contour of the slot 23 matches the end contour of the limit block 35. A chamfered surface is formed at the position where the limit block 35 contacts the abutment surface 22. According to the above technical solution, when the earthing switch is turned on, the rear door is closed. At this time, the limit rod 7 abuts against the slide bar 32 and pushes the slide bar 32 together with the curved rod 31, the flat shaft 3, and the limit block 35 to move toward the front door as a whole. The spring 33 is stretched, and the hook 34 is abutted by the extension portion 61 and rotates upward and is engaged with the limit groove 71. The limit block 35 is disengaged from the slot 23, and the rotating member 21 can rotate synchronously with the earthing switch transmission shaft 2 normally. The limit block 35 is in continuous contact with the abutment surface 22 under the restraining action of the spring 33. When the grounding switch is closed, the rotating member 21 rotates and resets, and the slide bar 32, the curved rod 31, the flat shaft 3, and the limit block 35 move toward the rear door as a whole under the restraining action of the spring 33. The limit block 35 is re-engaged with the slot 23, and the grounding switch transmission shaft 2 cannot rotate. The spring 33 contracts. Since there is a certain amount of opening and closing interval between the rear door and the frame 1 in the closed state, the slide bar 32 can push the limit rod 7 and the rear door to move outward a certain distance. As the hook 34 gradually moves away from the extension portion 61, the hook 34 automatically falls and disengages from the limit slot 71. At this time, the rear door can be opened normally, and the grounding switch cannot be started, ensuring that the rear door is in a safe closed state during the operation of the grounding switch to avoid accidents. Example

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, a grounding interlocking mechanism for a high-voltage switch cabinet is installed and used on a frame 1 of the switch cabinet. At least a front door and a rear door are hinged on two opposite sides of the frame 1. The interlocking mechanism includes a grounding switch transmission shaft 2 and a flat shaft 3, which are movably connected through a limit assembly 5. The limit assembly 5 has two states: unlocked and locked. The grounding switch transmission shaft 2 extends toward the front door, and the flat shaft 3 extends toward the rear door. Compared with the first embodiment: Figure 1 , Figure 2 , Figure 4 As shown, the earthing switch transmission shaft 2 and the flat shaft 3 are both installed against the inner wall of the frame 1. Compared with the traditional round shaft structure, the flat shaft 3 can further save the space inside the switch cabinet; and the frame 1 is also provided with a limiting member 4 at the position corresponding to the forward and backward movement of the flat shaft 3. The limiting member 4 is provided with a sliding groove that is slidably connected to the flat shaft 3. The sliding groove limits the lateral movement range of the flat shaft 3, thereby increasing the stability of the flat shaft 3 during movement.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The above contents are merely examples and explanations of the present utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present utility model.

Claims

1. A grounding interlocking mechanism for a high-voltage switch cabinet, comprising an interlocking mechanism, the interlocking mechanism being mounted and used on a frame (1) of the switch cabinet, the frame (1) having at least one front door and one rear door hingedly connected on opposite sides thereof, characterized in that: The interlocking mechanism comprises an earthing switch transmission shaft (2) and a flat shaft (3), the two being movably connected via a limit assembly (5), the limit assembly (5) being in two states: unlocked and locked, the earthing switch transmission shaft (2) extending towards the front door, and the flat shaft (3) extending towards the rear door; a fixing member (6) is provided at a position of the frame (1) close to the rear door, the flat shaft (3) moving horizontally with respect to the fixing member (6), the two being elastically connected via a spring (33), and the flat shaft (3) rotating at one end close to the rear door. The rear door is movably connected to a draw hook (34), and the inner wall of the rear door is connected to a limit rod (7) at a position corresponding to the draw hook (34). A limit groove (71) is provided at the limit rod (7). When the rear door is rotated to close, the limit rod (7) abuts against and pushes the end of the flat shaft (3) to move horizontally toward the front door. The draw hook (34) is engaged with the limit groove (71) after rotating a certain angle. At this time, the rear door is in a locked state, the limit assembly (5) is in an unlocked state, and the grounding switch transmission shaft (2) can rotate normally.

2. A grounding interlocking mechanism for a high-voltage switch cabinet according to claim 1, characterized in that: The earthing switch transmission shaft (2) and the flat shaft (3) are both installed close to the inner wall of the frame (1), thereby saving space inside the switch cabinet.

3. A grounding interlocking mechanism for a high-voltage switch cabinet according to claim 2, characterized in that: The frame (1) is provided with a limiting member (4) corresponding to the position of the flat shaft (3) moving forward and backward, and the limiting member (4) is provided with a sliding groove that is slidably sleeved with the flat shaft (3), and the sliding groove is used to increase the stability of the flat shaft (3) during movement.

4. A grounding interlocking mechanism for a high-voltage switch cabinet according to claim 1, characterized in that: The limit assembly (5) comprises a rotating member (21) sleeved and fixed on the surface of the earthing switch transmission shaft (2) and a limit block (35) fixedly connected to one side of the flat shaft (3); the side of the rotating member (21) facing the front door is an abutment surface (22); a slot (23) is also provided on the surface of the rotating member (21); the contour of the slot (23) matches the contour of the end of the limit block (35); when the earthing switch is turned on, the rear door is closed, the flat shaft (3) drives the limit block (35) to move toward the front door as a whole, at which time the limit block (35) is disengaged from the slot (23), and the pull The hook (34) is engaged with the limit groove (71), the rotating member (21) can rotate normally and synchronously with the earthing switch transmission shaft (2), the limit block (35) is continuously in contact with the abutment surface (22) under the restraining action of the spring (33), and when the earthing switch is turned off, the rotating member (21) rotates to reset, the flat shaft (3) drives the limit block (35) to move toward the rear door as a whole under the restraining action of the spring (33), the limit block (35) is re-engaged with the engagement groove (23), the hook (34) is disengaged from the limit groove (71), and the rear door can be opened normally at this time.

5. A grounding interlocking mechanism for a high-voltage switch cabinet according to claim 4, characterized in that: A chamfered surface is formed at the position where the limiting block (35) contacts the abutting surface (22).

6. A grounding interlocking mechanism for a high-voltage switch cabinet according to claim 4, characterized in that: The flat shaft (3) is connected to a bent rod (31) at one end close to the rear door. The bent rod (31) is connected to the hook (34) via a slide bar (32). The spring (33) is arranged between the bent rod (31) and the fixing member (6). The fixing member (6) is provided with an extension portion (61) at a position corresponding to the hook (34). When the rear door is in an open state, the hook (34) naturally rotates and falls under the action of gravity and abuts against the extension portion (61). When the rear door is in a closed state, the limit rod (7) pushes the slide bar (32) and drives the flat shaft (3) as a whole to move toward the front door. During the movement, the hook (34) abuts against the extension portion (61) and is engaged with the limit groove (71) after rotating upward. At this time, the grounding switch inside the switch cabinet can be operated.

7. A grounding interlocking mechanism for a high-voltage switch cabinet according to claim 6, characterized in that: The sliding rod (32) is slidably sleeved with the fixing member (6); a positioning ring (62) is further provided on the surface of the fixing member (6) at a position corresponding to the insertion position of the sliding rod (32); the positioning ring (62) is a cylindrical structure; the sliding rod (32) passes through the middle of the positioning ring (62); the diameter of the curved rod (31) is larger than the positioning ring (62); when the curved rod (31) abuts against the positioning ring (62), the sliding rod (32) cannot move further.

8. A grounding interlocking mechanism for a high-voltage switch cabinet according to claim 7, characterized in that: The limiting groove (71) is located at the lower end of the limiting rod (7), the horizontal height of the draw hook (34) is lower than the limiting rod (7), and the inner diameter of the limiting groove (71) is larger than the draw hook (34), that is, when there is no external force constraint, the draw hook (34) can naturally rotate and fall and disengage from the limiting groove (71).

9. A grounding interlocking mechanism for a high-voltage switch cabinet according to claim 1, characterized in that: The frame (1) is provided with an opening (11) at a position corresponding to the limiting rod (7); when the rear door is closed, the limiting rod (7) is inserted into the switch cabinet from the opening (11); and when the rear door is in a closed state, there is a certain amount of opening and closing interval between the rear door and the frame (1), leaving space for subsequent opening of the rear door.

Images