Grounding interlocking structure of switch cabinet

Abstract

The utility model belongs to the technical field of switch cabinets, and particularly relates to a switch cabinet grounding interlocking structure which comprises a side plate, a handcart guide rail, a grounding operation shaft and a handcart interlocking shaft, the handcart interlocking shaft is provided with a limiting rod and a limiting block, the operation end of the grounding operation shaft is slidably assembled with a baffle plate, the baffle plate is linked with the handcart interlocking shaft through a linkage small crank arm, and the handcart interlocking shaft is connected with the handcart guide rail. The handcart interlocking shaft is rotationally connected with the linkage small crank arm through the connecting rod, the baffle moves up and down to drive the handcart interlocking shaft to rotate, the limiting rod and the limiting block stretch out or retract, and therefore movement of the handcart is locked or unlocked, equidistant assembling holes are formed in the two ends of the linkage small crank arm, the length of a force arm can be adjusted through hole position switching, and the handcart interlocking device is suitable for handcarts of different specifications. Linkage is achieved only through the small linkage connecting lever and the connecting rod, transmission parts are reduced, installation efficiency is improved, raw material purchasing, labor and operation and maintenance cost is reduced, the problems that in the prior art, the structure is complex, cost is high, installation is tedious and the like are effectively solved, and remarkable engineering application value is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of switchgear technology, specifically a grounding interlocking structure for switchgear. Background Technology

[0002] Switchgear is a widely used piece of equipment in power systems. Circuit breaker trolleys and grounding switches are installed together in the switchgear. Grounding switches are protective devices that are only allowed to be closed during power outage maintenance, while circuit breakers are devices that disconnect the main circuit to meet power demand. Due to their different functional requirements, grounding switches can only be operated after the circuit breaker has been opened. To prevent possible misoperation between the two, the interlocking mechanism between the circuit breaker and the grounding switch has come into being.

[0003] A Chinese patent with publication number CN215897140U discloses a grounding switch and handcart interlocking mechanism for miniaturized switchgear. It primarily addresses the problem that existing grounding switch and handcart interlocking mechanisms cannot be applied to miniaturized switchgear. Through a grounding switch transmission component, a welded rotating rod, and an interlocking transmission device, the power of the grounding switch's opening and closing is converted into the movement force of an interlocking limit plate and a limit plate block. When extended, the limit plate blocks the handcart limit plate and the handcart interlocking limit plate, preventing the handcart from being driven. When retracted, the limit plate and the handcart interlocking limit plate are free and unrestricted, allowing the handcart to be driven. This achieves the interlocking of the grounding switch and handcart within the miniaturized switchgear, effectively ensuring the safety of the miniaturized switchgear.

[0004] The aforementioned miniaturized switchgear grounding switch and handcart interlocking mechanism still has some problems in use: the grounding interlocking structure adopts a multi-link transmission structure to realize the linkage control between the baffle and the handcart interlocking shaft. Its complex structure not only increases the cost of raw material procurement, but also makes installation and debugging cumbersome, resulting in high labor and equipment usage costs. The multiple moving parts of the complex transmission structure are prone to wear, leading to high maintenance costs and low reliability. This significantly increases the enterprise's inventory management and supply chain costs. The aforementioned miniaturized switchgear grounding switch and handcart interlocking mechanism has not effectively solved these problems. Therefore, a switchgear grounding interlocking structure is proposed to address the above problems. Utility Model Content

[0005] To address the shortcomings of existing miniaturized switchgear grounding switch and handcart interlocking mechanisms, a switchgear grounding interlocking structure is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The grounding interlocking structure of the switchgear described in this utility model includes a handcart guide rail set on one side of a side plate, a grounding operating shaft mounted on the side plate, a handcart interlocking shaft mounted on one side of the handcart guide rail, a limiting rod and a limiting block that can pass through the handcart guide rail to limit the movement of the handcart, a baffle slidably mounted on the operating end of the grounding operating shaft, an operating plate that passes through the side plate on the baffle, the baffle and the handcart interlocking shaft are linked by a linkage crank arm, a connecting rod is set at one end of the handcart interlocking shaft, the other end of the connecting rod is rotatably connected to one end of the linkage crank arm, the other end of the linkage crank arm is rotatably connected to one side of the baffle, the up and down movement of the baffle can drive the handcart interlocking shaft to rotate, so that the limiting rod and the limiting block pass through or retract into the handcart guide rail, thereby playing the function of locking and unlocking the movement of the handcart.

[0007] Preferably, the linkage crank arm has several equidistant mounting holes at the assembly ends of the connecting rod and the baffle, respectively, for hinged assembly with the connecting rod and the baffle.

[0008] Preferably, a tension spring is provided between the side plate and the linkage crank arm for pulling the linkage crank arm to rotate and reset, so that the baffle reset can block the operating end of the grounding operating shaft.

[0009] The beneficial effects of this utility model are:

[0010] This utility model provides a grounding interlocking structure for switchgear. This utility model uses only a linkage small crank arm connecting rod to realize the linkage between the baffle and the handcart interlocking shaft, reducing transmission components. This not only improves installation efficiency but also directly reduces the procurement expenditure of most raw materials. In addition, labor costs and operation and maintenance costs are also reduced, which has significant engineering application value. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0012] Figure 1 This is a three-dimensional structural view of the entire utility model;

[0013] Legend:

[0014] 1. Side plate; 2. Handcart guide rail; 3. Grounding operating shaft; 4. Handcart interlocking shaft; 5. Limit rod; 6. Limit block; 7. Baffle; 8. Operating panel; 9. Linkage small crank arm; 10. Connecting rod; 11. Assembly hole; 12. Tension spring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Specific implementation examples are given below.

[0017] Please see Figure 1 The present invention discloses a grounding interlocking structure for a switchgear, comprising a handcart guide rail 2 disposed on one side of a side plate 1, a grounding operating shaft 3 mounted on the side plate 1, and a handcart interlocking shaft 4 mounted on one side of the handcart guide rail 2. The handcart interlocking shaft 4 is provided with a limiting rod 5 and a limiting block 6 that can pass through the handcart guide rail 2 to limit the movement of the handcart. A baffle 7 is slidably mounted on the operating end of the grounding operating shaft 3, and an operating plate 8 passing through the side plate 1 is provided on the baffle 7. The baffle 7 and the handcart interlocking shaft 4 are linked by a small linkage arm 9. A connecting rod 10 is provided at one end of the handcart interlocking shaft 4, and the other end of the connecting rod 10 is rotatably connected to one end of the small linkage arm 9. The other end of the small linkage arm 9 is rotatably connected to one side of the baffle 7. The up-and-down movement of the baffle 7 can drive the handcart interlocking shaft 4 to rotate, causing the limiting rod 5 and the limiting block 6 to pass through or retract into the handcart guide rail 2, thereby locking and unlocking the movement of the handcart. During operation, when the operator... When the operator moves the operating plate 8 through the side plate 1 downwards, the baffle 7, which is fixedly connected to the operating plate 8, slides vertically downwards along the operating end of the grounding operating shaft 3. The hinge point on one side of the baffle 7 pulls the linkage small crank arm 9 to rotate. The linkage small crank arm 9 drives the handcart interlocking shaft 4 to rotate through the connecting rod 10 hinged at the other end, so that the limiting rod 5 and the limiting block 6 installed on the handcart interlocking shaft 4 pass through the handcart guide rail 2 to its inner side, locking the handcart chassis and preventing the handcart from moving, forming a locked state. When the baffle 7 moves upwards, it causes the linkage small crank arm 9 to rotate in the opposite direction, and through the connecting rod 10, it causes the handcart interlocking shaft 4 to rotate in the opposite direction, so that the limiting rod 5 and the limiting block 6 installed on the handcart interlocking shaft 4 retract to the outside of the handcart guide rail 2, releasing the limitation on the handcart and realizing the unlocked state where the handcart can move. This utility model adopts a simplified linkage structure of linkage small crank arm 9 and connecting rod 10, which reduces the number of transmission parts compared with the traditional interlocking structure, and solves the problems of many parts, complicated processing, and complicated installation in the existing linkage structure.

[0018] Furthermore, the linkage crank arm 9 has several equidistant mounting holes 11 at its assembly ends with the connecting rod 10 and the baffle 7, respectively, for hinged assembly with the connecting rod 10 and the baffle 7. During operation, the mounting ends of the linkage crank arm 9 have several equidistant mounting holes 11. By bolting the connecting rod 10 and the baffle 7 to different holes, the lever arm length of the linkage crank arm 9 can be changed, thereby adjusting the rotation angle of the handcart interlocking shaft 4, the operating stroke of the operating plate 8, and the transmission ratio. There is no need to replace the entire interlocking assembly; different specifications of handcarts can be adapted simply by changing the hole positions. By using different holes on the same crank arm, the problem of poor versatility of traditional interlocking mechanisms is solved.

[0019] Furthermore, a tension spring 12 is provided between the side plate 1 and the linkage small crank arm 9 to pull the linkage small crank arm 9 to rotate, so that the baffle 7 resets to block the operating end of the grounding operating shaft 3; during operation, when the operating plate 8 is pressed down to move the baffle 7 down to lock the vehicle, the tension spring 12 is stretched to store elastic potential energy. After the operator releases the operating plate 8, the tension of the tension spring 12 drives the linkage small crank arm 9 to rotate in the opposite direction, causing the baffle 7 to reset at a constant speed. The lower end of the baffle 7 covers the operating end of the grounding operating shaft 3 to prevent misoperation.

[0020] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A grounding interlock structure for a switchgear, comprising a handcart rail (2) disposed on one side of a side plate (1), wherein a grounding operating shaft (3) is mounted on the side plate (1), characterized in that: A handcart interlocking shaft (4) is mounted on one side of the handcart guide rail (2). The handcart interlocking shaft (4) is provided with a limiting rod (5) and a limiting block (6) that can pass through the handcart guide rail (2) to limit the movement of the handcart. A baffle (7) is slidably mounted on the operating end of the grounding operating shaft (3). An operating plate (8) that passes through the side plate (1) is provided on the baffle (7). The baffle (7) and the handcart interlocking shaft (4) are linked by a linkage small crank arm (9). A connecting rod (10) is provided at one end of the handcart interlocking shaft (4). The other end of the connecting rod (10) is rotatably connected to one end of the linkage small crank arm (9). The baffle (7) can rotate by moving up and down, so that the limiting rod (5) and the limiting block (6) can pass through or retract into the handcart guide rail (2), thereby locking and unlocking the movement of the handcart.

2. The grounding interlocking structure for a switchgear according to claim 1, characterized in that: The linkage small crank arm (9) has several equidistant mounting holes (11) at the assembly ends of the connecting rod (10) and the baffle (7) for mounting and hinged with the connecting rod (10) and the baffle (7).

3. The grounding interlocking structure for a switchgear according to claim 1, characterized in that: A tension spring (12) is provided between the side plate (1) and the linkage small crank arm (9) for pulling the linkage small crank arm (9) to rotate and reset, so that the baffle (7) resets and blocks the operating end of the grounding operating shaft (3).

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