Ring main unit instrument room test fixing tool

Abstract

The utility model relates to a ring main unit instrument room test fixing tool, and belongs to the field of electrical equipment detection. According to the technical scheme, the ring main unit instrument room test fixing tool comprises a base, and a lifting component and a clamping component are arranged on the base; the lifting component comprises a lifting driving device, and the upper end of the lifting driving device is connected with a bending support. The clamping component comprises a horizontal driving device, two clamping jaws are installed on the horizontal driving device, each clamping jaw comprises a vertical-panel-shaped clamping part, and the two clamping parts are arranged in parallel and directly face each other. According to the scheme, the fixing tool special for the instrument chamber of the ring main unit is designed, the ring main unit is fixed in a bottom lifting and two-side clamping mode, the instrument chamber is lifted to expose a bayonet socket at the bottom, meanwhile, the two sides of the instrument chamber are clamped to achieve complete fixation of the instrument chamber, and the instrument chamber can be prevented from inclining under the action of external force; and the bending support and the clamping jaw are both designed to be movable, so that the universality is improved, and the device can adapt to instrument rooms of different sizes.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment testing, and in particular to a fixed testing fixture for the instrument room of a ring main unit. Background Technology

[0002] In power transmission and transformation systems, 10kV ring main units (RNBs) are crucial electrical equipment. As a typical terminal distribution device, they are widely used in power systems and various industrial users, and are indispensable products in smart grids, directly affecting the safe and reliable operation of the power grid. Currently, existing domestic RNBs mainly include gas-insulated RNBs and solid-insulated RNBs. Among them, gas-insulated RNBs include SF6 gas-insulated RNBs, dry air RNBs, and nitrogen RNBs, which are widely used due to their excellent insulation performance, ease of processing, and low cost.

[0003] During the production process, the assembly sequence is as follows: first, the air box, mechanism room, and cable room are assembled into a whole to form the main body of the cabinet; then, the instrument room is assembled on the main body of the cabinet; next, the wiring between the instrument room and the main body of the cabinet is completed; and finally, the instrument room is debugged. The instrument room itself is quite heavy, and its installation requires a lot of manpower. Furthermore, if the debugging of the instrument room fails, it needs to be removed from the ring main unit, which increases the burden on the staff.

[0004] Using an off-site commissioning method, that is, connecting the instrument compartment interface to the external lead wire for commissioning, can avoid the aforementioned problem of repeated disassembly and assembly. However, if... Figure 1 As shown, the interfaces of the instrument compartment are located on the top and bottom surfaces. When the cables are plugged into the bottom surface of the cabinet during off-machine testing, the instrument compartment is difficult to maintain its upright position. The method of raising it cannot maintain the stability of the center of gravity, which makes off-machine testing of the ring network cabinet instrument compartment a certain challenge. Summary of the Invention

[0005] This utility model addresses the problem that the instrument compartment of a ring main unit is difficult to fix due to wiring issues when it is being tested in an off-site state, and provides a testing fixture for the instrument compartment of a ring main unit.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: a test fixture for a ring main unit instrument room, including a base, on which a lifting component and a clamping component are provided, the clamping component being located above the lifting component; the lifting component includes a lifting drive device, the upper end of which is connected to a bending support, the bending support being Z-shaped, including an upper plate, a lower plate, and a vertical connecting plate, the upper plate and the lower plate being located on both sides of the vertical connecting plate and respectively fixedly connected to the upper and lower edges of the vertical connecting plate; the clamping component includes a horizontal drive device, on which two jaws are mounted, each jaw including a vertical panel-shaped clamping part, the two clamping parts being arranged parallel and facing each other, the horizontal drive device being able to drive the two jaws to move towards each other. This design presents a fixture specifically for securing the instrument compartment of a ring main unit. It employs a bottom-support and side-clamping method to fix the ring main unit. The bending support engages with the inner right-angle structure at the bottom of the instrument compartment, lifting it to expose the bottom connectors. The bending support is also adjustable, allowing for further adjustment based on cable bending after wiring to ensure a tight connection between the cable connectors and the connectors. Clamping the sides of the instrument compartment provides complete fixation, preventing tilting of the instrument compartment under external force when operating buttons, knobs, or other switches on the front. Both the bending support and the clamps are movable, improving the fixture's versatility and adaptability to instrument compartments of different sizes.

[0007] As a preferred implementation of a test fixture for a ring main unit instrument room, the base is also provided with a rotating component. The rotating component includes a fixed part and a rotating part. The fixed part is fixedly connected to the base, and the lifting component and the clamping component are both installed on the rotating part.

[0008] As a preferred embodiment of a testing fixture for a ring main unit's instrument compartment, the fixed portion of the rotating component includes multiple first support columns, the upper ends of which collectively support and fix a second support. The rotating portion of the rotating component includes an instrument compartment support, with a first motor located below the second support. The output shaft of the first motor passes through the second support and connects to the instrument compartment support. The fixture further incorporates a rotatable structure, allowing operators to rotate the instrument compartment after installation, further reducing labor intensity and making testing operations in the instrument compartment more flexible and convenient.

[0009] As a preferred embodiment of a test fixture for a ring main unit's instrument compartment, the rotating component further includes a rotating disk. The upper surface of the rotating disk is provided with multiple second support columns. The instrument compartment support is fixed to the top of the second support columns, and a window is provided on the instrument compartment support. The lifting component and clamping component are located behind the window. The window allows cables to pass through, further reducing positional interference.

[0010] As a preferred implementation of a fixed fixture for testing in the instrument room of a ring main unit, the lifting drive device is a cylinder. The lifting component also includes a third support, which is L-shaped. The cylinder is installed in the L-shaped notch of the third support. The cylinder rod is set vertically upward, and the cylinder rod is fixedly connected to the bottom surface of the upper plate of the bending support.

[0011] As a preferred embodiment of a test fixture for a ring main unit instrument compartment, the clamping component includes a fourth support. A horizontal drive device is mounted on top of the fourth support, comprising a first lead screw and a second lead screw. The first and second lead screws are coaxially fixedly connected and rotate in opposite directions. Two grippers are respectively mounted on the first and second lead screws and are equidistant from the connection point between the first and second lead screws. A second motor is connected to either the first or second lead screw. By driving the lead screw to rotate via the motor, the relative movement distance of the two grippers can be precisely controlled, achieving accurate clamping of instrument compartments of different sizes.

[0012] As a preferred embodiment of the testing fixture for a ring main unit instrument room, the clamping component further includes a fifth support, on which the horizontal drive device is mounted. The fifth support is bolted to the top of the fourth support. The horizontal drive device can be quickly assembled and disassembled with the fifth support, facilitating maintenance.

[0013] As a preferred embodiment of a fixed fixture for testing in the instrument compartment of a ring main unit, the fifth support includes a vertical plate located in a vertical plane. The first and second lead screws are mounted on the front of the vertical plate, and the second motor is mounted on the back of the vertical plate. A second pulley is provided at the end of the first or second lead screw, and a first pulley is provided on the output shaft of the second motor. A transmission belt is mounted around both the first and second pulleys. This design makes reasonable use of space, reduces the lateral width of the fixture, and avoids interference with other components by mounting the motor on the back. The use of belt drive can achieve buffering and overload protection to avoid excessive pressure on the sides of the instrument compartment, while ensuring smooth power transmission from the motor and enabling precise movement of the grippers.

[0014] As a preferred embodiment of the fixed fixture for testing the instrument compartment of a ring main unit, the fifth support is further equipped with a first slide rail and a second slide rail. A first slide table and a second slide table are jointly mounted on the first and second slide rails. The lead screw nut is connected to the first slide table, and the lead screw nut is connected to the second slide table. The two grippers are respectively mounted on the first and second slide tables. The slide rails and slide tables provide precise guidance for the movement of the grippers, making the grippers more stable during movement, reducing shaking and offset, and further improving the accuracy and stability of the grippers clamping the instrument compartment. This ensures that the instrument compartment remains fixed during testing and is not affected by external forces.

[0015] As a preferred embodiment of the testing and fixing fixture for the instrument compartment of a ring main unit, rubber pads are provided on the opposing surfaces of the two grippers. The rubber pads increase the friction between the grippers and the instrument compartment, which can better fix the instrument compartment and prevent displacement of the instrument compartment during testing. At the same time, the rubber pads have a certain degree of elasticity, which can buffer the clamping force of the grippers on the instrument compartment, avoid damage to the surface of the instrument compartment, and protect the appearance and internal structure of the instrument compartment.

[0016] As can be seen from the above technical solutions, the advantages of this utility model are as follows: This fixture uses a bottom-supporting and side-clamping method to fix the ring main unit. The bending support cooperates with the right-angle structure at the bottom of the instrument compartment, which can be raised and lowered to ensure that the cable connectors and plug-in sockets are tightly inserted. The side clamping prevents the instrument compartment from tilting during operation. The bending support and the jaws are movable, improving versatility. The base is equipped with a rotating component, whose fixed and rotating parts cooperate to assist the operator in rotating the instrument compartment, reducing labor intensity and making the testing operation more flexible. The rotating disk and the second support column of the rotating part enhance the structural strength, and the window allows cables to pass through, reducing interference. The lifting drive device uses a cylinder, which, together with the L-shaped third support, provides fast response, smooth operation, and precise and controllable height adjustment. The horizontal drive device of the clamping component uses a motor to drive the lead screw, precisely controlling the movement distance of the jaws to achieve precise clamping of instrument compartments of different sizes. The fifth support is bolted to the top of the fourth support, facilitating quick disassembly and maintenance of the horizontal drive device. The upright plate design makes reasonable use of space, the rear-mounted motor avoids interference, and the belt drive provides buffering and overload protection, ensuring smooth power transmission. The slide rails and slide tables provide precise guidance for the movement of the grippers, improving clamping accuracy and stability. Rubber pads are placed on the opposing surfaces of the grippers to increase friction, secure the instrument compartment, buffer clamping force, and protect the appearance and internal structure of the instrument compartment. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description 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.

[0018] Figure 1 This is a structural schematic diagram of the instrument compartment of the ring main unit.

[0019] Figure 2 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the rotating component in a specific embodiment of this utility model. Figure 1 .

[0021] Figure 4This is a schematic diagram of the structure of the rotating component in a specific embodiment of this utility model. Figure 2 .

[0022] Figure 5 This is a schematic diagram of the lifting component in a specific embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the clamping component in a specific embodiment of the present invention. Figure 1 .

[0024] Figure 7 This is a schematic diagram of the clamping component in a specific embodiment of the present invention. Figure 2 .

[0025] Figure 8 This is a schematic diagram of the gripper structure in a specific embodiment of the present invention.

[0026] Figure 9 This is a schematic diagram illustrating the operation of a specific embodiment of the present invention.

[0027] Explanation of main figure symbols

[0028] 11. Instrument compartment main body; 12. Push-button switch; 13. Rotary switch; 14. Toggle switch; 15. First connector; 16. Second connector; 21. Base; 211. First support; 212. First motor; 213. First support column; 214. First gear; 215. Second gear; 216. Rotating shaft; 217. First turntable; 218. Second support; 219. Instrument compartment support; 22. Rotating component; 23. Lifting component; 231. Third support. 232. Cylinder, 233. Cylinder rod, 234. Bending support, 24. Clamping component, 241. Fourth support, 242. Fifth support, 243. Second motor, 244. First pulley, 245. Second pulley, 246. First slide, 247. Second slide, 248. First lead screw, 249. Second lead screw, 250. Coupling, 251. First slide rail, 252. Second slide rail, 253. Sixth support, 254. Seventh support, 255. Gripper, 256. Rubber pad. Detailed Implementation

[0029] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0030] like Figure 1 As shown, the current ring main unit's instrument compartment includes an instrument compartment body 11. The top of the instrument compartment body 11 has a first connector 15, and the bottom has a second connector 16. The first connector 15 and the second connector 16 are used to connect to the plugs on the ring main unit to achieve electrical control. The front of the instrument compartment body 11 has multiple push-button switches 12, rotary switches 13, and toggle switches 14. When testing the instrument compartment, the first connector 15 and the second connector 16 need to be wired, and then the push-button switches 12, rotary switches 13, and toggle switches 14 are activated to determine if the intended function can be achieved. Figure 1 It is evident that the lower rear side of the instrument compartment body 11 has a right-angled notch, which makes it less stable when placed upright and also inconvenient for bottom wiring.

[0031] To address this, this embodiment provides a test fixture for the instrument room of a ring main unit, such as... Figure 2 As shown, the fixed fixture includes a base 21, on which a rotating component 22, a lifting component 23, and a clamping component 24 are provided. The rotating component 22 includes a fixed part and a rotating part. The fixed part is fixedly connected to the base 21. The lifting component 23 and the clamping component 24 are both mounted on the rotating part, and the clamping component 24 is located above the lifting component 23. Specifically:

[0032] like Figure 2 , Figure 3 As shown, the fixed part of the rotating component 22 includes multiple first support columns 213, the upper ends of which together support and fix a second support 218; the rotating part of the rotating component 22 includes an instrument compartment support 219, a first motor 212 is provided below the second support 218, the output shaft of the first motor 212 passes through the second support 218 and is connected to the instrument compartment support 219; the rotating part of the rotating component 22 also includes a rotating disk 217, the upper surface of which is provided with multiple second support columns, the instrument compartment support 219 is fixed to the top of the second support columns, the instrument compartment support 219 has a window, and the lifting component 23 and clamping component 24 are located behind the window.

[0033] The first support 211 is fixedly mounted on the base 21 for mounting the first motor 212. The first motor 212 is fixedly mounted on one side of the center of the first support 211 and is used to drive the rotation of the rotating part. There are three first support columns 213, which are fixedly mounted on the base 21 and located outside the first motor 212, for supporting the second support 218. The second support 218 is fixed and stationary relative to the base 21 and supports the turntable 217. The output shaft of the first motor 212 is connected to a first gear 214, the outer gear of which cooperates with a second gear 215. The second gear 215 is fixedly mounted on a rotating shaft 216 and cooperates with the first gear 214. The rotation of the second gear 215 will drive the rotation of the first rotating shaft 216. The first rotating shaft 216 is mounted on the base 21 and located at the center of the base 21, and can rotate relative to the base 21. Turntable 217 is fixedly mounted on first rotating shaft 216. Rotation of first rotating shaft 216 drives turntable 217 to rotate. Turntable 217 can rotate relative to second support 218. Four second support columns are provided above turntable 217. Instrument housing support 219 has a disc-shaped structure and is fixed to the upper ends of the four second support columns of turntable 217 by bolts. Instrument housing support 219 is relatively stationary with respect to turntable 217. Rectangular window is provided on instrument housing support 219 to prevent interference with the second connector on the lower side of instrument housing. Lifting component 23 and clamping component 24 are fixedly mounted on instrument support to fix the position of instrument housing.

[0034] The working process of the rotating component 22 is as follows: the first motor 212 rotates, the first motor 212 drives the first gear 214 to rotate, and drives the second gear 215 and the first rotating shaft 216 to rotate. Since the first rotating shaft 216, the turntable 217 and the instrument chamber support 219 are relatively fixed, the instrument chamber support 219 is driven to rotate, so that the instrument chamber fixed on the instrument chamber support 219 rotates, and the instrument chamber reaches the desired rotation angle position.

[0035] like Figure 5 As shown, the lifting component 23 includes a lifting drive device, and a bending support 234 is connected to the upper end of the lifting drive device. The bending support 234 is Z-shaped and includes an upper plate, a lower plate, and a vertical connecting plate. The upper plate and the lower plate are located on both sides of the vertical connecting plate and are fixedly connected to the upper and lower edges of the vertical connecting plate, respectively. The lifting drive device is a cylinder 232. The lifting component also includes a third support 231, which is L-shaped. The cylinder 232 is installed in the L-shaped notch of the third support 231. The cylinder rod 233 of the cylinder 232 is vertically upward and is fixedly connected to the bottom surface of the upper plate of the bending support 234.

[0036] The third support 231 is fixedly mounted on the instrument compartment support 219 by screws. The cylinder 232 is located above the third support 231 and is connected to the third support 231 by screws, serving as the drive mechanism for the lifting component 23. The bending support 234 is mounted on the cylinder rod 233 by screws. The bending support 234 is in direct contact with the instrument compartment, and its overall structure is Z-shaped. Figure 9 As shown, this design allows for better contact with the two lower surfaces and one side of the instrument compartment, increasing the contact area and making the bending support 234 more reliable when supporting the instrument compartment's vertical movement. When the lifting component 23 is working, it controls the inflation and deflation of the cylinder 232, causing the cylinder rod 233 to extend and retract, which in turn drives the bending support 234 and the instrument compartment to move vertically up and down, allowing the instrument compartment to reach the desired height.

[0037] like Figure 6-8 As shown, the clamping component 24 includes a fourth support 241, and a horizontal drive device is disposed on the top of the fourth support 241. Two grippers 255 are mounted on the horizontal drive device. Each gripper 255 includes a vertical panel-shaped clamping part, and the two clamping parts are arranged parallel to each other. Rubber pads 256 are provided on the opposite surfaces of the two grippers 255. The horizontal drive device can drive the two grippers 255 to move towards each other. Specifically, the horizontal drive device includes a first lead screw 248 and a second lead screw 249. The first lead screw 248 and the second lead screw 249 are coaxially fixedly connected by a coupling 250 and rotate in opposite directions. The two grippers 255 are respectively mounted on the first lead screw 248 and the second lead screw 249 and are equidistant from the connection point between the first lead screw 248 and the second lead screw 249. The first lead screw 248 or the second lead screw 249 is connected to a second motor 243.

[0038] Furthermore, the clamping component 24 also includes a fifth support 242, on which the horizontal drive device is mounted. The fifth support 242 is bolted to the top of the fourth support 241. The fifth support 242 includes a vertical plate located in a vertical plane. A first lead screw 248 and a second lead screw 249 are mounted on the front of the vertical plate. The fifth support 242 is also provided with a first slide rail 251 and a second slide rail 252. A first slide table 246 and a second slide table 24 are jointly mounted on the first slide rail 251 and the second slide rail 252. 7. The lead screw nut of the first lead screw 248 is connected to the first slide table 246, the lead screw nut of the second lead screw 249 is connected to the second slide table 247, the two grippers 255 are respectively installed on the first slide table 246 and the second slide table 247, the second motor 243 is installed on the back of the upright plate, the end of the first lead screw 248 or the second lead screw 249 is provided with a second pulley 245, the output shaft of the second motor is provided with a first pulley 244, and a transmission belt is jointly installed around the first pulley 244 and the second pulley 245.

[0039] The fourth support 241 is fixedly installed on the instrument compartment support 219, raising the working part of the entire clamping component 24 to the required height, so that it can clamp the two side walls of the instrument compartment without interfering with the lifting component 23. It has bent edges on both sides and raised reinforcing ribs at the rear to ensure the structural strength of the fourth support 241 and prevent it from being bent or deformed by the instrument compartment. The fifth support 242 is fixedly installed on the fourth support 241 with screws. It also has multiple reinforcing ribs at the rear to ensure structural strength. The sixth support 253 and the seventh support 254 are respectively installed at both ends of the front side of the fifth support. The second motor 243 is installed on the rear side of the fifth support 242 with screws, serving as the drive mechanism for the entire clamping component 24.

[0040] The first pulley 244 is fixedly connected to the second motor 243. The rotation of the second motor 243 drives the first pulley 244 to rotate. The second pulley 245 is fixedly mounted on the first lead screw 248 and is connected to the first pulley 244 via a transmission belt. The rotation of the second pulley 245 drives the first lead screw 248 to rotate. The first lead screw 248 is mounted on the sixth support 253 and can rotate relative to the sixth support 253. One end of the first lead screw 248 is connected to the second lead screw 249 via a coupling 250. The second lead screw 249 is mounted on the seventh support 254 and can rotate relative to the seventh support 254. It is connected to the first lead screw 248 via a coupling 250, and its thread direction is the same as that of the first lead screw 248. Conversely, the first slide rail 251 and the second slide rail 252 are mounted on the sixth support 253 and the seventh support 254 at both ends. The first slide table 246 is mounted on the first slide rail 251, the second slide rail 252 and the first lead screw 248, and moves in coordination with the first lead screw 248. When the first lead screw 248 rotates, the first slide table 246 moves horizontally. The second slide table 247 is mounted on the first slide rail 251, the second slide rail 252 and the second lead screw 249, and moves in coordination with the second lead screw 249. When the second lead screw 249 rotates, the second slide table 247 moves horizontally. Due to the different rotation directions of the first lead screw 248 and the second lead screw 249, the first slide table 246 and the second slide table 247 will move closer to each other or further away from each other during movement. Two grippers 255 are respectively fixedly mounted on the first slide 246 and the second slide 247 by screws, and the surfaces of the two grippers are arranged opposite each other. Rubber pads 256 are provided on the gripper surfaces to increase the contact friction with the instrument chamber, making the gripping operation safer. The clamping component 24 works as follows: The second motor 243 runs, sequentially driving the first pulley 244, the second pulley 245, the first lead screw 248, the coupling 250, and the second lead screw 249 to rotate. Because the two lead screws rotate in different directions, the first slide 246 and the second slide 247 move horizontally in different directions, thereby causing the two grippers 255 to move closer or further apart. Figure 9 As shown, this enables the clamping and fixing of the instrument chamber or the release of the clamping force.

[0041] Through the coordinated transmission of the rotating component 22, the lifting component 23, and the clamping component 24, the instrument compartment can be moved to the required position under different working conditions. Furthermore, the clamping component 24 can freely adjust the clamping width, enabling the clamping and fixing of instrument compartments of different models and sizes, thus improving the flexibility of the device.

[0042] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: This fixture uses a bottom-supporting and side-clamping method to fix the ring main unit. The bending support cooperates with the right-angle structure at the bottom of the instrument compartment, which can be raised and lowered to ensure that the cable connectors are tightly inserted into the plug-in sockets. The side clamping prevents the instrument compartment from tilting during operation. The bending support and the jaws are movable, improving versatility. The base is equipped with a rotating component, whose fixed and rotating parts cooperate to assist the operator in rotating the instrument compartment, reducing labor intensity and making the testing operation more flexible. The rotating disk and the second support column of the rotating part enhance the structural strength, and the window allows cables to pass through, reducing interference. The lifting drive device uses a cylinder, which, in conjunction with the L-shaped third support, provides fast response, smooth operation, and precise and controllable height adjustment. The horizontal drive device of the clamping component uses a motor to drive a lead screw, precisely controlling the movement distance of the jaws to achieve precise clamping of instrument compartments of different sizes. The fifth support is bolted to the top of the fourth support, facilitating quick disassembly and maintenance of the horizontal drive device. The upright plate design makes reasonable use of space, the rear-mounted motor avoids interference, and the belt drive provides buffering and overload protection, ensuring smooth power transmission. The slide rails and slide tables provide precise guidance for the movement of the grippers, improving clamping accuracy and stability. Rubber pads are placed on the opposing surfaces of the grippers to increase friction, secure the instrument compartment, buffer clamping force, and protect the appearance and internal structure of the instrument compartment.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test fixture for a ring main unit instrument compartment, comprising a base (21), characterized in that, The base (21) is provided with a lifting component (23) and a clamping component (24), and the clamping component (24) is located above the lifting component (23); The lifting component (23) includes a lifting drive device, and the upper end of the lifting drive device is connected to a bending support (234). The bending support (234) is Z-shaped and includes an upper plate, a lower plate and a vertical connecting plate. The upper plate and the lower plate are located on both sides of the vertical connecting plate and are fixedly connected to the upper and lower edges of the vertical connecting plate respectively. The clamping component includes a horizontal drive device, on which two jaws (255) are mounted. Each jaw (255) includes a vertical panel-shaped clamping part, and the two clamping parts are arranged in parallel and facing each other. The horizontal drive device can drive the two jaws (255) to move towards each other.

2. The test fixture for the instrument room of the ring main unit according to claim 1, characterized in that, The base (21) is also provided with a rotating component (22), which includes a fixed part and a rotating part. The fixed part is fixedly connected to the base (21), and the lifting component (23) and the clamping component (24) are both installed on the rotating part.

3. The test fixture for the instrument room of the ring main unit according to claim 2, characterized in that, The fixed part of the rotating component (22) includes a plurality of first support columns (213), the upper ends of which are jointly supported and fixed to a second support (218); the rotating part of the rotating component (22) includes an instrument room support (219), a first motor (212) is provided below the second support (218), and the output shaft of the first motor (212) passes through the second support (218) and is connected to the instrument room support (219).

4. The test fixture for the instrument room of the ring main unit according to claim 3, characterized in that, The rotating part of the rotating component (22) also includes a rotating disk (217). The upper surface of the rotating disk (217) is provided with a plurality of second support columns. The instrument room support (219) is fixed to the top of the second support columns. The instrument room support (219) has a window. The lifting component (23) and the clamping component (24) are located behind the window.

5. The test fixture for the instrument room of the ring main unit according to any one of claims 1-4, characterized in that, The lifting drive device is a cylinder (232). The lifting component also includes a third support (231). The third support (231) is L-shaped. The cylinder (232) is installed in the L-shaped notch of the third support (231). The cylinder rod (233) of the cylinder (232) is set vertically upward. The cylinder rod (233) is fixedly connected to the bottom surface of the upper plate of the bending support (234).

6. The test fixture for the instrument room of the ring main unit according to claim 1, characterized in that, The clamping component (24) includes a fourth support (241), and a horizontal drive device is disposed on the top of the fourth support (241). The horizontal drive device includes a first lead screw (248) and a second lead screw (249). The first lead screw (248) and the second lead screw (249) are coaxially fixedly connected and rotate in opposite directions. The two grippers (255) are respectively installed on the first lead screw (248) and the second lead screw (249) and are at the same distance from the connection point between the first lead screw (248) and the second lead screw (249). The first lead screw (248) or the second lead screw (249) is connected to a second motor (243).

7. The test fixture for the instrument room of the ring main unit according to claim 6, characterized in that, The clamping component (24) also includes a fifth support (242), on which the horizontal drive device is mounted, and the fifth support (242) is bolted to the top of the fourth support (241).

8. The test fixture for the instrument room of the ring main unit according to claim 7, characterized in that, The fifth support (242) includes a vertical plate located in a vertical plane. The first lead screw (248) and the second lead screw (249) are installed on the front of the vertical plate, and the second motor (243) is installed on the back of the vertical plate. The end of the first lead screw (248) or the second lead screw (249) is provided with a second pulley (245). The output shaft of the second motor is provided with a first pulley (244). A transmission belt is jointly installed around the first pulley (244) and the second pulley (245).

9. The test fixture for the instrument room of the ring main unit according to claim 7, characterized in that, The fifth support (242) is also provided with a first slide rail (251) and a second slide rail (252). The first slide rail (251) and the second slide rail (252) are jointly equipped with a first slide table (246) and a second slide table (247). The lead screw (248) nut is connected to the first slide table (246), and the lead screw (249) nut is connected to the second slide table (247). The two grippers (255) are respectively installed on the first slide table (246) and the second slide table (247).

10. The test fixture for the instrument room of the ring main unit according to claim 1, characterized in that, Rubber pads (256) are provided on the opposite surfaces of the two grippers (255).

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