Reverse interlocking mechanism for high-voltage switch cabinet
By designing a reverse interlocking mechanism in a high-voltage switch cabinet, the limiting rod, barrier rod and cam are used to achieve synchronous interlock between the cabinet door and the ground switch operating shaft, the problems of complex operation and safety hazards in the existing technology are solved, and the problems of high-voltage operation are improved. Operational security and simplify operational processes.
Patent Information
- Application Number
- CN202421098928.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-20
Smart Images
Figure CN222440403U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of switch cabinets, in particular to a reverse 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 inventors stated that in the prior art solution, the synchronization between the door closing action of the switch cabinet and the grounding switch is poor, and after the door is closed, additional control of other components is required to operate the grounding switch, which increases the operating burden of the staff and poses a safety hazard. Utility Model Content
[0005] In order to overcome the above technical problems, the purpose of the utility model is to provide a reverse interlocking mechanism for a high-voltage switch cabinet, which solves the problem that the interlocking mechanism between the switch door and the grounding switch of the current high-voltage switch cabinet has poor synchronization and complicated operation.
[0006] The purpose of the utility model can be achieved through the following technical solutions: a reverse interlocking mechanism for a high-voltage switch cabinet, installed and used between a cabinet body and a cabinet door of the switch cabinet, an earthing switch operating shaft is rotatably arranged inside the cabinet body, and a cam is also sleeved and fixed on the outside of the earthing switch operating shaft, a limit rod is slidably arranged at the opening of the cabinet body corresponding to the closed position after the cabinet door is rotated, and the limit rod is automatically reset on its moving trajectory by a spring, one end of the limit rod extends out of the cabinet body, and the other end of the limit rod is rotatably connected to one end of a baffle rod, and the other end of the baffle rod extends to the cam, a limit shaft is arranged inside the cabinet body corresponding to the middle part of the baffle rod, and the baffle rod rotates about the limit shaft, and when the cabinet door is closed, the limit rod drives the baffle rod to rotate about the limit shaft, at this time, the end of the baffle rod and the cam are misaligned with each other, and the earthing switch operating shaft can rotate normally.
[0007] Furthermore, a retaining ring is sleeved and fixed on the surface of the limit rod, and a fixing frame is provided on the cabinet body corresponding to the position of the moving track of the limit rod. The limit rod is slidably connected to the fixing frame, and the spring is sleeved between the outside of the limit rod corresponding to the retaining ring and the fixing frame.
[0008] Furthermore, the side surface of the fixing frame is in an L-shaped structure, one end of which is fixedly connected to the cabinet body, and the other end of which extends to the moving track of the limiting rod.
[0009] Furthermore, the limiting rod and the blocking rod are both round rods, wherein the end of the blocking rod close to the cam is a rectangular rod.
[0010] Furthermore, a fixing piece is provided on the inner wall of the cabinet body at a position corresponding to the rectangular rod, and a limiting groove is provided through the middle of the fixing piece. The rectangular rod slides in the limiting groove. When the cabinet door presses against the limiting rod, the rectangular rod moves from one end of the limiting groove to the other end. At this time, the rectangular rod is misaligned with the cam.
[0011] Furthermore, the surface where the cam abuts against the rectangular rod is a plane, and anti-slip grooves are formed on the plane.
[0012] Compared with the traditional method, the technical solution sets a limit rod, a stop rod and a cam as an interlocking mechanism between the cabinet door and the earthing switch operating shaft. When the staff closes the door, the limit rod is pressed and pushes the stop rod to move. At this time, the end of the stop rod is misaligned with the cam, so that the earthing switch operating shaft can rotate, so that the earthing switch can only be operated when the door is closed, thereby improving the safety of the staff's operation. There is no need to operate other components additionally. The staff can unlock the grounding switch operating shaft by closing the cabinet door along the traditional method. There is no need for additional learning and operating costs, which is conducive to popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The utility model is further described below in conjunction with the accompanying drawings.
[0014] Figure 1 It is a three-dimensional view of the utility model applied to a cabinet;
[0015] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle (a schematic diagram of the position of the limit rod when the door is closed);
[0016] Figure 3 This is the main view of the utility model applied to the cabinet;
[0017] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.
[0018] In the figure: 1, cabinet; 2, earthing switch operating shaft; 21, cam; 3, limit rod; 31, fixing bracket; 32, retaining ring; 33, spring; 4, retaining rod; 41, limit shaft; 5, fixing piece; 51, limit groove. DETAILED DESCRIPTION
[0019] 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.
[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a reverse interlocking mechanism for a high-voltage switch cabinet is installed and used between a cabinet body 1 and a cabinet door of the switch cabinet. An earthing switch operating shaft 2 is rotatably arranged inside the cabinet body 1, and a cam 21 is also sleeved and fixed on the outside of the earthing switch operating shaft 2; Figure 2 and Figure 4 As shown, a limit rod 3 is slidably provided at the opening of the cabinet body 1 corresponding to the closed position after the cabinet door is rotated. The limit rod 3 is horizontally arranged, one end of which extends out of the cabinet body 1, and the other end thereof passes through the fixing frame 31 and is rotatably connected to one end of the stop rod 4. The other end of the stop rod 4 extends upward to the vicinity of the cam 21. When the cabinet door is not closed, the stop rod 4 is located on the rotation track of the cam 21. When the grounding switch operating shaft 2 rotates, the cam 21 will abut against the end of the stop rod 4, thereby preventing the grounding switch operating shaft 2 from rotating further, and the grounding switch cannot be rotated when the cabinet door is opened.
[0021] like Figure 2 and Figure 4 As shown, a fixing frame 31 is further provided at a position of the cabinet 1 corresponding to the moving trajectory of the limit rod 3. Viewed from the side, the fixing frame 31 is an L-shaped structure, one end of which is fixedly connected to the inner wall of the cabinet 1, and the other end thereof extends to the moving trajectory of the limit rod 3. The limit rod 3 slides in and out of the fixing frame 31, and a retaining ring 32 is further sleeved on the outer wall of the limit rod 3. A spring 33 is further sleeved between the outer wall of the limit rod 3 corresponding to the retaining ring 32 and the fixing frame 31. When the cabinet door rotates and presses the limit rod 3 to slide toward the inside of the cabinet 1, the retaining ring 32 squeezes the spring 33, and the spring 33 is compressed at this time. When the cabinet door is opened, the limit rod 3 automatically resets under the action of the spring 33.
[0022] like Figure 2 and Figure 4As shown, a limit axis 41 is provided at the middle of the inner wall of the cabinet 1 corresponding to the stop rod 4, and the stop rod 4 rotates about the limit axis 41. When the cabinet door is closed, the limit rod 3 moves toward the inside of the cabinet 1, and the stop rod 4 is pushed at this time and moves toward one side of the cabinet door about the limit axis 41, that is, the limit rod 3 and the stop rod 4 move in opposite directions. At this time, the end of the stop rod 4 is misaligned with the cam 21, and the grounding switch operating shaft 2 can rotate normally, meeting the safety specification that the cabinet door is closed and the grounding switch can be operated.
[0023] like Figure 2 and Figure 4 As shown, the limit rod 3 and the blocking rod 4 are both round rods, wherein the end of the blocking rod 4 close to the cam 21 is a rectangular rod, and a fixing part 5 is provided on the inner wall of the cabinet 1 at the position corresponding to the rectangular rod. A limiting groove 51 is penetrated through the middle of the fixing part 5, and the rectangular rod slides in the limiting groove 51. When the cabinet door presses against the limit rod 3, the rectangular rod moves from one end of the limiting groove 51 to the other end. At this time, the rectangular rod is misaligned with the cam 21, and the limiting groove 51 serves to limit the rotation range of the blocking rod 4, thereby ensuring that the blocking rod 4 can accurately complete the task requirements of blocking and not blocking as required without a large movement range.
[0024] In this embodiment, the surface where the cam 21 abuts against the rectangular rod is a plane, and anti-slip grooves are formed on the plane, so that when the cam 21 abuts against the rectangular rod, the contact is tighter to prevent the two from shaking.
[0025] The technical solution sets a limit rod 3, a stop rod 4 and a cam 21 as an interlocking mechanism between the cabinet door and the earthing switch operating shaft 2. When the staff closes the door, the limit rod 3 is pressed and pushes the stop rod 4 to move. At this time, the end of the stop rod 4 is misaligned with the cam 21, so that the earthing switch operating shaft 2 can rotate, so that the earthing switch can be operated only when the door is closed, thereby improving the safety of the staff's operation. There is no need to operate other components additionally. The staff can unlock the earthing switch operating shaft 2 by closing the cabinet door along the traditional method. There is no need for additional learning and operating costs, which is conducive to popularization and use.
[0026] Operation instructions: The grounding switch cannot be operated when the cabinet door is open: When the cabinet door is opened, under the elastic force of the spring 33, the limit rod 3 moves toward the outside of the cabinet body 1, and the limit rod 3 drives the lower end of the stop rod 4 to move toward the outside of the cabinet body 1 about the limit axis 41. At this time, the rectangular rod at the upper end of the stop rod 4 moves in the opposite direction to the bottom of the cam 21. Therefore, when the cabinet door is open, the cam 21 will contact the rectangular rod when the grounding switch operating shaft 2 rotates, and it cannot rotate further, and the grounding switch cannot be operated.
[0027] The grounding switch can be operated when the cabinet door is closed: when the cabinet door is closed, the cabinet door presses against the end of the limit rod 3 extending to the outside of the cabinet body 1, the retaining ring 32 presses the spring 33 to contract, and the limit rod 3 moves toward the inside of the cabinet body 1. At this time, the lower end of the retaining rod 4 moves toward the inside of the cabinet body 1 about the limit axis 41, and the rectangular rod at its upper end moves toward the outside of the cabinet body 1 in the limit groove 51. At this time, the rectangular rod is misaligned with the cam 21. When the grounding switch operating shaft 2 rotates, the cam 21 will not contact the rectangular rod, so that the grounding switch can be operated when the cabinet door is closed.
[0028] 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.
[0029] 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 reverse interlocking mechanism for a high-voltage switch cabinet, installed and used between a cabinet body (1) and a cabinet door of the switch cabinet, wherein an earthing switch operating shaft (2) is rotatably arranged inside the cabinet body (1), characterized in that: A cam (21) is also sleeved and fixed on the outside of the earthing switch operating shaft (2); a limit rod (3) is slidably provided at the opening of the cabinet body (1) corresponding to the position of the cabinet door after the cabinet door is rotated and closed; the limit rod (3) is automatically reset on its moving track by a spring (33); one end of the limit rod (3) extends out of the cabinet body (1); the other end of the limit rod (3) is rotatably connected to one end of a stop rod (4); the other end of the stop rod (4) extends to the cam (21); a limit shaft (41) is provided inside the cabinet body (1) corresponding to the middle part of the stop rod (4); the stop rod (4) rotates about the limit shaft (41); when the cabinet door is closed, the limit rod (3) drives the stop rod (4) to rotate about the limit shaft (41); at this time, the end of the stop rod (4) and the cam (21) are mutually offset, and the earthing switch operating shaft (2) can rotate normally.
2. A reverse interlocking mechanism for a high-voltage switch cabinet according to claim 1, characterized in that: A retaining ring (32) is sleeved and fixed on the surface of the limiting rod (3); a fixing frame (31) is further provided on the cabinet (1) at a position corresponding to the moving track of the limiting rod (3); the limiting rod (3) is slidably connected to the fixing frame (31); and the spring (33) is sleeved between the outside of the limiting rod (3) and the fixing frame (31) corresponding to the retaining ring (32).
3. A reverse interlocking mechanism for a high-voltage switch cabinet according to claim 2, characterized in that: The side surface of the fixing frame (31) is in an L-shaped structure, one end of which is fixedly connected to the cabinet (1), and the other end of which extends to the moving track of the limiting rod (3).
4. A reverse interlocking mechanism for a high-voltage switch cabinet according to claim 1, characterized in that: The limiting rod (3) and the blocking rod (4) are both round rods, wherein the end of the blocking rod (4) close to the cam (21) is a rectangular rod.
5. A reverse interlocking mechanism for a high-voltage switch cabinet according to claim 4, characterized in that: A fixing piece (5) is provided on the inner wall of the cabinet body (1) at a position corresponding to the rectangular rod, and a limiting groove (51) is provided through the middle of the fixing piece (5). The rectangular rod slides in the limiting groove (51). When the cabinet door presses against the limiting rod (3), the rectangular rod moves from one end of the limiting groove (51) to the other end. At this time, the rectangular rod is misaligned with the cam (21).
6. A reverse interlocking mechanism for a high-voltage switch cabinet according to claim 5, characterized in that: The surface where the cam (21) abuts against the rectangular rod is a plane, and anti-slip grooves are formed on the plane.