Ground knife interlocking mechanism limiter for centrally installed switchgear

Abstract

The utility model belongs to a ground knife interlocking mechanism limiter for a centrally installed switchgear. Comprising a centrally installed switchgear body, a cabinet door frame of the centrally installed switchgear body is provided with a limiting hole, the limiting hole is internally provided with a telescopic grounding knife-switch interlocking rod, the grounding knife-switch interlocking rod is provided with a first protruding block, and when the grounding knife-switch interlocking rod extends out, the first protruding block is provided with a second protruding block at a position corresponding to a grounding knife-switch operating rod. The tail end of the grounding knife-switch interlocking rod is provided with a guide sleeve and a spring capable of realizing telescoping of the grounding knife-switch interlocking rod, the cabinet door frame is provided with a detachable limiting and fixing part, and the limiting and fixing part is provided with a limiting part used for compressing and limiting the grounding knife-switch interlocking rod; the device has the advantages of being simple in structure, reasonable in design, convenient to reuse, labor-saving and capable of reducing operation risks.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary components of central cabinets, specifically a limiter for a ground knife interlocking mechanism for a central cabinet. Background Technology

[0002] A medium-voltage switchgear, also known as a metal-clad medium-voltage withdrawable switchgear, is a type of high-voltage power distribution equipment. The interlocking principle of the grounding switch in a medium-voltage switchgear is as follows: When the rear door is closed, a protrusion on the door presses against the grounding switch interlocking rod, causing the rod to move forward and create a gap between the first and second protrusions. This gap allows the grounding switch operating lever to rotate and perform the grounding switch opening / closing operation. When the rear door is open, the first and second protrusions are in contact, preventing the grounding switch from opening or closing. In practical work, when insulation testing is required, the rear door must be open before the grounding switch is opened, allowing the insulation test to proceed.

[0003] Based on the above problems, currently, when performing insulation testing, one person is stationed at the back of the cabinet to hold the pop-out grounding switch transmission rod with a pin, while two other people operate the grounding switch in front of the cabinet. At this time, the person at the back needs to continuously hold the grounding switch transmission rod while simultaneously calling out to the operators in front. However, the sound is limited by the arc-proof masks worn by the personnel in front, resulting in poor communication between the two sides. Furthermore, the person at the back, continuously holding the transmission rod, is extremely prone to loosening due to the spring force, posing a risk of mechanical injury. This operation is time-consuming, labor-intensive, and carries operational risks. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a floor knife interlocking mechanism limiter for a central cabinet, in order to solve the technical problems existing in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A limiter for a floor knife interlocking mechanism in a central cabinet includes a central cabinet body. A limit hole is provided on the cabinet door frame of the central cabinet body. A retractable floor knife interlocking rod is provided in the limit hole. A first protrusion is provided on the floor knife interlocking rod. When the floor knife interlocking rod is extended, a second protrusion is provided at the corresponding position of the first protrusion and the floor knife operating rod. The end of the floor knife interlocking rod is provided with a guide sleeve and a spring that enables the floor knife interlocking rod to extend and retract. A detachable limiting fixing part is provided on the cabinet door frame. The limiting fixing part is provided with a limiting part for compressing and limiting the floor knife interlocking rod.

[0007] The beneficial effects of this utility model are as follows: by setting a limiting and fixing part, it can be fixed with the cabinet door frame. At the same time, it is connected to the limiting part and the limiting part compresses and limits the ground knife interlocking rod, thereby saving labor and reducing operational risks. Furthermore, the limiting and fixing part and the cabinet door frame are detachably connected, so that this utility model can be used in conjunction with several central cabinets to improve utilization.

[0008] Preferably, the limiting and fixing part includes a detachable part connected to the cabinet door frame, and a limiting connector adapted to the limiting part.

[0009] Preferably, the limiting connector includes a fixing plate and connecting plates respectively disposed on both sides of the fixing plate. The ends of the connecting plates are respectively connected to the cabinet door frame through corresponding detachable parts, and the fixing plate is provided with a threaded hole in the middle.

[0010] Preferably, the limiting part is a screw with a nut, the external thread of the screw is adapted to the internal thread in the threaded hole, and the outer diameter of the end of the screw is smaller than the inner diameter of the limiting hole.

[0011] Preferably, the detachable component includes a magnet that attracts to the end of the connecting plate.

[0012] Preferably, the fixing plate and the connecting plate are an integral structure; the connecting plate is L-shaped, and a magnet is provided on the outer end face of its short side.

[0013] Preferably, the detachable component further includes at least one magnet with a threaded hole in the middle, and threaded holes are respectively provided on the outer end face of the corresponding short side of the L-shaped connecting plate and the fixing plate, and a detachment screw is installed through the threaded hole and the hole.

[0014] A grounding knife interlocking mechanism limiter for a central power cabinet, manufactured according to the above technical solution, achieves connection between the cabinet door frame and the limiting part by setting a limiting and fixing part, thereby compressing and limiting the grounding knife interlocking rod, which facilitates insulation testing of the central power cabinet. The limiting part in this utility model is a screw rod with a nut, that is, the extension and positioning of the screw rod is achieved by threaded engagement, which has the characteristics of simple structure, low cost and strong limiting. The detachable part in this utility model is preferably in the form of a magnet. This form not only facilitates installation, fixing and disassembly, but also does not damage the original structure of the central power cabinet. In actual use, if the magnetic force of the magnet is insufficient, it cannot achieve the purpose of limiting. If the magnetic force is too large, disassembly will be inconvenient. Based on this, this utility model is equipped with a disassembly screw. When disassembly is required, the magnet can be removed by pushing out the disassembly screw. It has the characteristics of simple structure, reasonable design, convenient reuse, labor saving and reduced operation risk. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model in use.

[0017] Figure 2 for Figure 1 A magnified view of part A in the middle.

[0018] Figure 3 for Figure 1 A magnified view of part B in the middle section.

[0019] Figure 4 This is a schematic diagram of the structure of this utility model.

[0020] In the diagram: 1. Central cabinet body; 2. Cabinet door frame; 3. Limiting hole; 4. Ground knife interlocking rod; 5. First protrusion; 6. Ground knife operating rod; 7. Second protrusion; 8. Fixing plate; 9. Connecting plate; 10. Nut; 11. Screw; 12. Magnet; 13. Removal screw; 14. Guide sleeve; 15. Spring. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] The following is in conjunction with the appendix Figure 1-4To further describe this application in detail, this utility model is a floor knife interlocking mechanism limiter for a central cabinet, including a central cabinet body 1. A limiting hole 3 is opened on the cabinet door frame 2 of the central cabinet body 1. A retractable floor knife interlocking rod 4 is provided in the limiting hole 3. A first protrusion 5 is provided on the floor knife interlocking rod 4. When the floor knife interlocking rod 4 is extended, a second protrusion 7 is provided at the corresponding position of the first protrusion 5 and the floor knife operating rod 6. The end of the floor knife interlocking rod 4 is provided with a guide sleeve 14 and a spring 15 that can realize the extension and retraction of the floor knife interlocking rod 4. A detachable limiting fixing part is provided on the cabinet door frame 2. The limiting fixing part is provided with a limiting part for compressing and limiting the floor knife interlocking rod 4. This utility model is mainly used in insulation testing of a centrally located cabinet. It connects to the cabinet door frame 2 via a detachable limiting and fixing part, and simultaneously connects to a limiting part, allowing the limiting part to pass through the limiting hole 3 and compress and limit the grounding knife interlocking rod 4, thus achieving insulation testing. The aforementioned detachable connection refers to conventional methods such as bolt connection or pin connection. Its main purpose is to facilitate the connection and disassembly between the cabinet door frame 2 and the limiting and fixing part, thereby improving the utilization rate of this utility model and making it easier to close the cabinet door after the insulation test. The limiting and fixing part also provides an installation position for the limiting part and allows the limiting part to pass through the limiting hole 3 and compress and limit the grounding knife interlocking rod 4. This utility model is characterized by its resistance to loosening, replacement of manual labor, reduction of personnel requirements, lower risk during operation, and improved work efficiency.

[0023] Furthermore, the limiting and fixing part includes a detachable component connected to the cabinet door frame 2, and a limiting connector adapted to the limiting part. The detachable component described in this invention can be a conventional connection such as bolts, its main purpose being to facilitate the fixing between the cabinet door frame 2 and the detachable component. The limiting connector facilitates the installation and limiting of the limiting part.

[0024] Furthermore, the limiting connector includes a fixing plate 8 and connecting plates 9 respectively disposed on both sides of the fixing plate 8. The ends of the connecting plates 9 are connected to the cabinet door frame 2 through corresponding detachable parts. The fixing plate 8 has a threaded hole in the middle. In this utility model, the fixing plate 8 and the connecting plates 9 on both sides can form a semi-enclosed structure with one side opening of the cabinet door frame 2. The cross-section of the frame formed can be a rectangle, square, circle, or ellipse with one side opening.

[0025] Furthermore, the limiting part is a screw 11 with a nut 10. The external thread of the screw 11 is adapted to the internal thread in the threaded hole, and the outer diameter of the end of the screw 11 is smaller than the inner diameter of the limiting hole 3. This utility model can realize the displacement and limiting of the screw 11 by matching the external thread of the screw 11 with the internal thread in the threaded hole. At the same time, the end of the screw 11 can be inserted into the limiting hole 3 to realize the compression limiting of the ground knife interlocking rod 4.

[0026] Furthermore, the detachable component includes a magnet 12 that is attracted to the end of the connecting plate 9. This invention uses a magnet 12 as a detachable component, which avoids disrupting the original structure and use of the central cabinet; that is, it does not affect the original use of the central cabinet or the opening and closing mechanism of the rear cabinet door.

[0027] Furthermore, the fixing plate 8 and the connecting plate 9 are an integral structure; the connecting plate 9 is L-shaped, and a magnet 12 is provided on the outer end face of its short side. This arrangement enables a secure fixation between the magnet 12 and the connecting plate 9.

[0028] Furthermore, the detachable component also includes at least one magnet 12 with a threaded hole in its center. The threaded hole is connected to threaded holes on the outer end face of the corresponding short side of the L-shaped connecting plate 9 and on the fixing plate 8. A disassembly screw 13 is inserted through the threaded hole and the hole. In this invention, a magnet with strong magnetic force is preferred when selecting the magnet 12 to achieve the purpose of firmly compressing and limiting the ground knife interlocking rod 4. However, a strong magnet presents the characteristic of inconvenience in disassembling the magnet. Based on this, the above-mentioned structural form is designed. When it is necessary to remove the magnet, the disassembly screw 13 is rotated so that the end of the disassembly screw abuts against the cabinet door frame 2, thereby removing the magnet 12. The above structure can be set on one magnet 12 or on two magnets.

[0029] The specific working process of this utility model is as follows: When the insulation test of the central cabinet is required, the fixing plate 8 and the connecting plates 9 on both sides are integrated. The magnet 12 corresponding to the lower part of the connecting plate 9 is magnetically connected to the cabinet door frame 2. The position of this utility model is moved so that the end of the screw 11 is in the position corresponding to the limiting hole 3. Then, the screw 11 is rotated by the nut 10 so that the end of the screw 11 enters the limiting hole 3 and presses the ground knife interlocking rod 4, so that a gap is created between the first protrusion and the second protrusion. Then, the insulation test of the central cabinet is carried out manually. After the insulation test, the screw 11 is rotated in the opposite direction by the nut 10 so that the screw 11 exits the limiting hole 3, and the ground knife interlocking rod 4 is reset. When it is necessary to remove this utility model, the screw 13 is disassembled so that the disassembly screw 13 presses against the cabinet door frame 2, so that the magnet 12 and the cabinet door frame 2 are separated. This utility model can be reused and can be used for multiple central cabinets, thereby improving work efficiency, reducing the number of operators and avoiding mechanical injury to personnel.

[0030] 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 middle cabinet ground knife interlocking mechanism limiter, comprising a middle cabinet body (1), a limiting hole (3) is opened on the cabinet door frame (2) of the middle cabinet body (1), a telescopic ground knife interlocking rod (4) is arranged in the limiting hole (3), a first protrusion (5) is arranged on the ground knife interlocking rod (4), and a second protrusion (7) is arranged on the corresponding position of a ground knife operating rod (6) when the ground knife interlocking rod (4) is extended, characterized in that: The end of the ground knife interlocking rod (4) is provided with a guide sleeve (14) and a spring (15) that can realize the extension and retraction of the ground knife interlocking rod (4). The cabinet door frame (2) is provided with a detachable limiting and fixing part, and the limiting and fixing part is provided with a limiting part for compressing and limiting the ground knife interlocking rod (4). ​ 2. The ground switch interlocking mechanism limiter for a cubicle substation according to claim 1, characterized in that: The limiting and fixing part includes a detachable part connected to the cabinet door frame (2) and a limiting connector adapted to the limiting part.

3. The ground switch interlock mechanism limiter for a cubicle substation according to claim 2, characterized in that: The limiting connector includes a fixed plate (8) and connecting plates (9) respectively disposed on both sides of the fixed plate (8). The ends of the connecting plates (9) are connected to the cabinet door frame (2) through corresponding detachable parts. The fixed plate (8) has a threaded hole in the middle.

4. The ground switch interlock mechanism limiter for a cubicle substation according to claim 3, characterized in that: The limiting part is a screw (11) with a nut (10). The external thread of the screw (11) is adapted to the internal thread in the threaded hole. The outer diameter of the end of the screw (11) is smaller than the inner diameter of the limiting hole (3).

5. The ground fault interlock mechanism limiter for a pad-mounted transformer, as recited in claim 3, wherein: The detachable component includes a magnet (12) that is attracted to the end of the connecting plate (9).

6. The ground fault interlock mechanism limiter for a pad-mounted transformer, as recited in claim 5, wherein: The fixing plate (8) and the connecting plate (9) are an integral structure; The connecting plate (9) is L-shaped, and a magnet (12) is provided on the outer end face of its short side.

7. A floor switch interlocking mechanism limiter for a centrally located cabinet according to claim 6, characterized in that: The detachable component also includes at least one magnet (12) with a threaded hole in the middle. The threaded hole and the corresponding L-shaped connecting plate (9) and the fixing plate (8) have threaded holes respectively. The threaded hole and the hole are fitted with a disassembly screw (13).

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