Low-voltage current transformer quick release device for transformer substation

Abstract

The invention discloses a low-voltage current transformer quick-dismounting device for a transformer substation, and relates to the technical field of transformer dismounting and mounting, and the low-voltage current transformer quick-dismounting device comprises a dismounting and mounting end and a supporting end. The dismounting end is arranged at the supporting end and comprises a dismounting head, a steering knuckle, an adapter shaft and a tail end support, and the dismounting head is driven by rotation of the steering knuckle to achieve bolt dismounting. The supporting end comprises a supporting base, a supporting plate and a connecting base, the supporting frame is arranged on the side face of the supporting end, and the supporting frame comprises a vertical rod and a transverse rod. According to the device, through multi-degree-of-freedom adjustment of the steering knuckle and accurate positioning of the arc-shaped head, bolt clamping and fixing can be completed in a narrow space; the magnetic attraction block and the clamping groove are designed in a double-anti-disengaging mode, and therefore the bolt is prevented from slipping when adjusting the transmission torque. The supporting end is reinforced through height adjustment, side face supporting and inclined supporting, and a stable operation platform is provided. The dismounting end is flexibly adjusted and designed in an anti-falling mode and is matched with the supporting end, accurate bolt dismounting in a narrow space and mutual inductor falling prevention are achieved, and the process is efficient, safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of instrument transformer disassembly and assembly technology, specifically to a quick-release device for low-voltage current transformers used in substations. Background Technology

[0002] In power distribution networks, low-voltage current transformers (hereinafter referred to as "transformers") are widely deployed in distribution cabinets, switch boxes, and other scenarios as core equipment for current measurement and protection monitoring. However, their installation locations are often close to the side wall of the cabinet or embedded in narrow spaces, and the space constraints and efficiency issues of disassembly and assembly have long plagued maintenance personnel. Currently, the mainstream disassembly and assembly relies on traditional manual tools, which is completed by manually rotating hexagonal fixing bolts. This process has some unacceptable problems: Traditional wrenches require sufficient space to rotate, but the internal clearance of electrical cabinets is often less than 30mm, and in older or custom-made cabinets, it is even reduced to less than 20mm. The tools are bulky and the angle is not adjustable, making them prone to jamming, slipping, or even accidentally touching live parts due to spatial interference, which can lead to safety accidents.

[0003] Large-size instrument transformers have large internal core holes and bulky coils. When installed on a side wall, the distance between the coil and the back panel of the cabinet is often less than 40mm. During disassembly, the coil moves with the instrument transformer, compressing the space and even obstructing the bolt heads. This requires additional prying of the coil, prolonging the operation time and increasing the risk of insulation wear.

[0004] When only 1-2 bolts remain to secure the transformer during the later stages of disassembly, the transformer is suspended by the remaining bolts or friction, requiring one hand to hold it up and the other to operate it. In deep cabinets, it is difficult to reach the bottom support, and the transformer is prone to falling due to a shift in the center of gravity. This can result in minor damage such as broken casing and deformed coils, or even serious injury to personnel or damage to adjacent equipment, significantly increasing maintenance costs and safety risks.

[0005] The above problems are particularly difficult when the distribution cabinet is small and only one person can operate it. Reaching into the cabinet to disassemble and install the equipment, as well as the risk of the transformer falling during disassembly, are very difficult to solve. Summary of the Invention

[0006] The purpose of this invention is to provide a quick-release device for low-voltage current transformers in substations to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a quick-release device for a low-voltage current transformer in a substation, comprising a disassembly end and a support end, wherein the disassembly end is disposed on the support end, and the support end is provided with a support frame; The disassembly and assembly end is used for disassembling and assembling the current transformer. The disassembly and assembly end includes a disassembly and assembly head, an adapter shaft, and a tail end bracket. The end of the disassembly and assembly head is connected to the steering knuckle. The steering knuckle is connected to the adapter shaft. The adapter shaft is mounted on the tail end bracket. The steering shaft can drive the steering knuckle to rotate, thereby driving the disassembly and assembly head to rotate, thus realizing the disassembly and assembly of bolts. The support end includes a support base, a support plate, and a connecting seat. The tail end bracket is detachably mounted on the connecting seat. The connecting seat is fixedly mounted on the top of the support plate. The support plate is mounted on the support base. The support frame is disposed on the side of the support end. The support frame includes a vertical rod and a horizontal rod. The vertical rod is mounted on the support base, and the horizontal rod is mounted on the top of the vertical rod.

[0008] Preferably, the disassembly / assembly head includes an arc-shaped head and a connecting column. The arc-shaped head is disposed on the top of the connecting column, and the working surface of the arc-shaped head is arc-shaped. The connecting column is connected to the steering knuckle.

[0009] Preferably, the working surface of the arc-shaped head is provided with a slot, the bottom of the slot is provided with a magnetic block, and the opening of the slot is provided with a guide slope. The slot is used to hold the head of the bolt.

[0010] Preferably, the end of the steering shaft is provided with a mounting sleeve for mounting power tools.

[0011] Preferably, the tail end bracket includes a front frame, a middle frame, and a rear frame. The front frame is fixedly installed on the connecting seat, the middle frame is fixedly installed between the front frame and the rear frame, and the rear frame is provided with gripping holes.

[0012] Preferably, the steering knuckle includes a driven knuckle and a driving knuckle, which are connected by a connecting knuckle. The driving knuckle is provided with a side bracket, and a remotely controlled servo motor is mounted on the side bracket. The output shaft of the servo motor is connected to the connecting knuckle and can drive the connecting knuckle and the driven knuckle to rotate.

[0013] Preferably, the adapter shaft is provided with a diagonal brace sleeve, the lower end of which is hinged to the diagonal brace rod, and the lower end of which is supported on the corresponding support groove of the support plate.

[0014] Preferably, the bottom of the vertical rod is inserted into the sleeve, and the sleeve is fixedly installed on the support base.

[0015] Preferably, the transverse rod is provided with a groove, and there are several grooves arranged side by side. The groove is used to insert a plug.

[0016] Preferably, the top of the vertical rod is provided with a cylinder, and the horizontal rod is inserted into the cylinder.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the multi-degree-of-freedom adjustment of the steering knuckle and the precise positioning of the arc-shaped head, allows the bolt to be inserted and fixed in a confined space at the disassembly and assembly end. The dual anti-dislodgement design of the magnetic block and the slot ensures that the bolt does not slip during the adjustment and torque transmission process, providing a stable foundation for subsequent bolt disassembly and assembly. 2. The support end in this invention provides a stable working platform for the assembly and disassembly end through height adjustment, side support and diagonal bracing reinforcement; the multi-degree-of-freedom adjustment and anti-detachment design of the assembly and disassembly end, with the cooperation of the support end, enables precise assembly and disassembly of bolts in a narrow space and protection against the fall of the current transformer, making the overall process efficient, safe and reliable. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the present invention.

[0019] Figure 2 This is a top view of the present invention.

[0020] Figure 3 This is the front view of the present invention. Figure 4 for Figure 3 The left view.

[0021] Figure 5 This is a structural diagram of the disassembly and assembly end of the present invention.

[0022] In the diagram: 1-Disassembly / Assembly End; 11-Disassembly / Assembly Head; 111-Arc Head; 112-Connecting Column; 113-Slot; 114-Magnetic Block; 12-Adapter Shaft; 121-Mounting Sleeve; 13-Tail End Bracket; 131-Front Frame; 132-Middle Frame; 133-Rear Frame; 14-Steering Knuckle; 141-Driven Knuckle; 142-Driven Knuckle; 143-Connecting Knuckle; 144-Side Bracket; 145-Servo Motor; 2-Support End; 21-Support Base; 22-Support Plate; 23-Connecting Seat; 3-Support Frame; 31-Vertical Rod; 311-Sleeve; 312-Cylinder; 32-Horizontal Rod; 321-Groove; 322-Insertion Plate; 4-Diagonal Brace Sleeve; 41-Diagonal Brace Rod; 100-Mutual Inductor. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1 to 5The present invention provides a technical solution: a quick-release device for low-voltage current transformers in substations, comprising a disassembly end 1 and a support end 2, wherein the disassembly end 1 is disposed on the support end 2, and the support end 2 is provided with a support frame 3. The disassembly and assembly end 1 is used to disassemble and assemble the current transformer 100. The disassembly and assembly end 1 includes a disassembly and assembly head 11, an adapter shaft 12, and a tail end bracket 13. The end of the disassembly and assembly head 11 is connected to a steering knuckle 14. The steering knuckle 14 is connected to the adapter shaft 12. The adapter shaft 12 is mounted on the tail end bracket 13. The steering shaft 12 can drive the steering knuckle 14 to rotate, thereby driving the disassembly and assembly head 11 to rotate, so as to disassemble and assemble the bolts. The disassembly / assembly end 1 is the actuator, which acts directly on the transformer bolts. It achieves multi-degree-of-freedom angle adjustment through the transmission chain of the disassembly / assembly head 11, steering knuckle 14, adapter shaft 12, and tail end bracket 13.

[0025] The mounting head 11 is responsible for contacting the bolt and transmitting torque; the steering knuckle 14, as an intermediate joint, allows the mounting head 11 to swing in the horizontal and vertical directions; the adapter shaft 12 converts the rotation of the steering knuckle into linear or rotary motion, and finally transmits the force to the support end 2 through the tail end bracket 13.

[0026] The support frame 2 includes a support base 21, a support plate 22, and a connecting seat 23. The tail end bracket 13 is detachably mounted on the connecting seat 23. The connecting seat 23 is fixedly mounted on the top of the support plate 22. The support plate 22 is mounted on the support base 21. Support end 2 is the basic platform, which includes support frame 2 and side support frame 3. The support base 21, support plate 22 and connecting seat 23 of support frame 2 form a support, which not only provides overall height support, but also can be detachably connected to tail end bracket 13 through connecting seat 23 to adapt to the replacement of different models of disassembly and assembly ends; the side support frame 3 reinforces from the side to prevent the device from tipping over due to uneven force.

[0027] The support frame 3 is disposed on the side of the support end 2. The support frame 3 includes a vertical rod 31 and a horizontal rod 32. The vertical rod 31 is mounted on the support base 21, and the horizontal rod 32 is mounted on the top of the vertical rod 31.

[0028] In this embodiment, the disassembly head 11 includes an arc-shaped head 111 and a connecting post 112. The arc-shaped head 111 is disposed on the top of the connecting post 112, and the working surface of the arc-shaped head 111 is arc-shaped. The connecting post 112 is connected to the steering knuckle 14.

[0029] The working surface of the arc-shaped head 111 is designed to be arc-shaped. When the disassembly head 11 rotates, the arc-shaped surface can avoid interference with the screw and also meet the need to lock the screw head after the rotation angle, reduce the pressure per unit area, and avoid local stress concentration and slippage caused by bolt corrosion or stripping.

[0030] The connecting column 112 has a stepped shaft structure and is fixed to the mounting hole of the steering knuckle 14 by interference fit or set screw to ensure the reliability of connection during high torque transmission.

[0031] In this embodiment, the working surface of the arc-shaped head 111 is provided with a slot 113, the bottom of the slot 113 is provided with a magnetic block 114, and the opening of the slot 113 is provided with a guide slope. The slot 113 is used to hold the head of the bolt.

[0032] The groove 113 is designed to match the hexagonal head of the bolt. The groove depth is about 1 / 3 of the bolt head thickness, which ensures that the bolt will not slide laterally after being inserted, while also allowing for slight angular deviation.

[0033] The magnetic block 114 uses neodymium iron boron rare earth permanent magnets, which are embedded in the bottom of the slot 113 to generate an attraction force on the ferromagnetic bolt. This not only makes it easy for the slot 113 to hold the screw, but also prevents the bolt from falling off due to vibration or operational errors.

[0034] The guide slope forms a 30° angle with the bottom surface of the slot, and the edge is rounded with a radius of 0.5mm to reduce the resistance when the bolt head is inserted and to avoid wear on the bolt edges or cracking of the arc head caused by hard impact.

[0035] In this embodiment, the end of the steering shaft 12 is provided with a mounting sleeve 121, which is used to mount power tools.

[0036] The inner hole of mounting sleeve 121 is a regular hexagon, which is fixed to an electric wrench by a set screw, supporting quick assembly and disassembly.

[0037] Mounting sleeve 121 has a limiting boss on its outer circumference to prevent the electric wrench from moving axially and ensure the stability of torque transmission.

[0038] If electric operation is not required, the hexagonal drive of the adapter shaft 12 can be directly locked with a manual wrench, which is compatible with manual operation scenarios.

[0039] In this embodiment, the tail support 13 includes a front frame 131, a middle frame 132 and a rear frame 133. The front frame 131 is fixedly installed on the connecting seat 23, the middle frame 132 is fixedly installed between the front frame 131 and the rear frame 133, and the rear frame 133 is provided with gripping holes.

[0040] The front frame 131 is made of aluminum alloy square tube and is fixed to the connecting seat 23 by bolts. The contact surface is attached with a rubber pad, which can both reduce shock and prevent slipping.

[0041] The rear frame 133 has gripping holes, and the horizontal distance between the holes and the adapter shaft 12 is 150mm, which makes it easy for maintenance personnel to grip the device.

[0042] In this embodiment, the steering knuckle 14 includes a driven knuckle 141 and a driving knuckle 142. The driven knuckle 141 and the driving knuckle 142 are connected by a connecting knuckle 143. The driving knuckle 142 is provided with a side bracket 144. A remotely controlled servo motor 145 is mounted on the side bracket 144. The output shaft of the servo motor 145 is connected to the connecting knuckle 143 and can drive the connecting knuckle 143 and the driven knuckle 141 to rotate.

[0043] Driven section 141 and driven section 142 are hinged by a pin, allowing relative rotation of ±90°, covering the common horizontal / vertical mounting angles of bolts in the distribution cabinet.

[0044] The connecting section 143 has a U-shaped fork structure, with its two ends connected to the pins of the driving section 142 and the driven section 141 respectively, to ensure rotational synchronization.

[0045] The servo motor 145 is a miniature servo motor, controlled by a 2.4GHz wireless remote controller. The output shaft is connected to the drive connector 143 via a key, enabling remote angle adjustment of the disassembly head 11 and avoiding the safety risks of manual adjustment.

[0046] In this embodiment, the adapter shaft 12 is provided with a diagonal brace sleeve 4, the lower end of the diagonal brace sleeve 4 is hinged to the diagonal brace rod 41, and the lower end of the diagonal brace rod 41 is supported on the corresponding support groove of the support plate 22.

[0047] The diagonal brace 4 is a ring shape, tightly gripping the middle of the adapter shaft 12.

[0048] The lower end of the diagonal brace 41 is inserted into the support groove of the support plate 22 to keep the rotating shaft 12 horizontal.

[0049] The connection point between the diagonal brace sleeve 4 and the diagonal brace rod 41 is located near the deflection center of the adapter shaft 12, which can reduce the maximum deflection of the adapter shaft 12 from 0.5mm to 0.1mm, ensuring the angular accuracy of the disassembly head 11.

[0050] In this embodiment, the bottom of the vertical rod 31 is inserted into the sleeve 311, and the sleeve 311 is fixedly installed on the support base 21.

[0051] In this embodiment, the transverse rod 32 is provided with a groove 321, and the groove 321 is provided with several parallel grooves. The groove 321 is used to insert the insert 322.

[0052] The groove 321 is opened along the length of the transverse rod 32, and the insert 322 can be inserted. The insert 322 is inserted into the cabinet and extends below the current transformer 100. When the current transformer falls, it can catch the magnetic core hole of the current transformer and prevent it from falling and being damaged during disassembly. This can prevent the current transformer from falling in a way that occupies minimal space.

[0053] In this embodiment, the top end of the vertical rod 31 is provided with a cylinder 312, and the horizontal rod 32 is inserted into the cylinder 312.

[0054] Example 1: Function of the disassembly / assembly end Step 1: Disassembling the head to its initial state and adjusting the angle The disassembly head 11 is in the storage state, the slot 113 of the arc head 111 is facing upward, the magnetic block 114 is in the adsorption state, and the driven joint 141 and the driving joint 142 of the steering knuckle 14 are at an initial angle.

[0055] The maintenance personnel send a command to the servo motor 145 via a 2.4GHz wireless remote control. The servo motor output shaft drives the connecting joint 143 to rotate. The connecting joint 143, in conjunction with the driving joint 142 and the driven joint 141, swings relative to each other, causing the disassembly head 11 to adjust its angle and avoid the side of the current transformer 100 that may block the screw, until the working surface of the arc-shaped head 111 faces the target bolt.

[0056] Step 2: Bolt insertion and anti-loosening fixation The maintenance personnel manually hold the rear frame 133 of the tail bracket 13 and slowly insert the disassembly head 11 into the power distribution cabinet until the slot 113 of the arc head 111 approaches the hexagonal head of the bolt.

[0057] Using the guide ramp at the inlet of slot 113, the bolt head is smoothly guided into the slot; the magnetic block 114 at the bottom of the slot simultaneously attracts the bolt, ensuring that the bolt is stably stuck in the slot, completing the pre-fixing of the bolt, and also preventing the disassembled bolt from falling off.

[0058] Step 3: Torque Transmission Preparation After removing the fixing bolts of head 11, the maintenance personnel should keep the disassembly end 1 stable. If electric disassembly is required, insert the output shaft of the electric wrench into the mounting sleeve 121 at the end of the adapter shaft 12 and tighten the set screw to fix it. If manual operation is required, directly use the wrench to hold the hexagonal section of the adapter shaft 12 and prepare to apply torque.

[0059] With the multi-degree-of-freedom adjustment of the steering knuckle 14 and the precise positioning of the arc head 111, the disassembly end 1 can complete the insertion and fixing of bolts in a narrow space. The dual anti-dislodgement design of the magnetic block 114 and the slot 113 ensures that the bolts do not slip during the adjustment and torque transmission process, providing a stable foundation for subsequent bolt disassembly and assembly.

[0060] Example 2: Overall structure with the detachable end installed on the support end The support end can be selected to be used in conjunction with the disassembly end as needed. When not needed, the disassembly end can be used independently.

[0061] Step 1: Deployment and Stability Reinforcement of Support End Place the support base 21 on the ground in front of the distribution cabinet, ensuring that the support end does not shift.

[0062] Adjust the depth of the vertical rod 31 inserted into the sleeve 311 of the support base 21 according to the installation depth of the current transformer; insert the horizontal rod 32 into the cylinder 312 at the top of the vertical rod 31, and adjust the insertion depth to form a stable rectangular support frame.

[0063] The diagonal brace 4 is tightly held in the middle of the adapter shaft 12, and the lower end of the diagonal brace 41 is supported on the corresponding support groove to form a triangular stable support and prevent the adapter shaft from shifting under force.

[0064] Step 2: Connect the disassembly end to the support end. The maintenance personnel hold the rear frame 133 of the tail end bracket 13, align the front frame 131 with the mounting surface of the support end 2 connecting seat 23, and fix it with bolts to ensure that the disassembly end 1 and the support end 2 do not wobble relative to each other.

[0065] Confirm that the remote control signal of the servo motor 145 is normal, the electric wrench matches the mounting sleeve 121 of the adapter shaft 12, and the groove 321 of the horizontal rod 32 on the side support bracket 3 at the support end has been inserted with the marked insert.

[0066] Step 3: Angle adjustment and bolt removal / installation The maintenance personnel control the servo motor 145 via remote control, which drives the steering knuckle 14 to adjust the angle of the disassembly head 11 so that the slot 113 of the arc head 111 is precisely aligned with the hexagonal head of the bolt, and the magnetic block 114 attracts and fixes the bolt.

[0067] When the electric wrench is activated, the torque is transmitted to the bolt through the adapter shaft 12, steering knuckle 14, and disassembly head 11, enabling efficient disassembly and assembly.

[0068] Step 4: Current transformer lifting During the later stages of disassembly, the current transformer began to sag due to its own weight. Maintenance personnel used the inserts already inserted in the groove 321 of the horizontal bar 32 to prevent it from falling.

[0069] Step 5: Device Recovery After the bolt is completely loosened, the servo motor 145 reverses the drive of the steering knuckle 14, causing the disassembly head 11 to retract from the bolt position.

[0070] Unscrew the M8 bolts between the tail end bracket 13 and the connecting seat 23, and remove the disassembly end 1 from the support end 2.

[0071] The support end 2 provides a stable working platform for the disassembly and assembly end 1 through height adjustment, side support and diagonal bracing reinforcement; the multi-degree-of-freedom adjustment and anti-detachment design of the disassembly and assembly end 1, with the cooperation of the support end, enables precise disassembly and assembly of bolts in a narrow space and protection against the fall of the current transformer, making the whole process efficient, safe and reliable.

[0072] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative and not exhaustive. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A quick-release device for low-voltage current transformers in substations, characterized in that: It includes a disassembly end (1) and a support end (2), wherein the disassembly end (1) is disposed on the support end (2), and the support end (2) is provided with a support frame (3). The disassembly and assembly end (1) is used to disassemble and assemble the current transformer (100). The disassembly and assembly end (1) includes a disassembly and assembly head (11), an adapter shaft (12), and a tail end bracket (13). The end of the disassembly and assembly head (11) is connected to the steering knuckle (14). The steering knuckle (14) is connected to the adapter shaft (12). The adapter shaft (12) is mounted on the tail end bracket (13). The steering shaft (12) can drive the steering knuckle (14) to rotate, thereby driving the disassembly and assembly head (11) to rotate, so as to realize the disassembly and assembly of bolts. The support end (2) includes a support base (21), a support plate (22) and a connecting seat (23). The tail end bracket (13) is detachably installed on the connecting seat (23). The connecting seat (23) is fixedly installed on the top of the support plate (22). The support plate (22) is installed on the support base (21). The support frame (3) is located on the side of the support end (2). The support frame (3) includes a vertical rod (31) and a horizontal rod (32). The vertical rod (31) is installed on the support base (21), and the horizontal rod (32) is installed on the top of the vertical rod (31).

2. The quick-release device for low-voltage current transformers in substations according to claim 1, characterized in that: The disassembly / assembly head (11) includes an arc-shaped head (111) and a connecting column (112). The arc-shaped head (111) is located on the top of the connecting column (112). The working surface of the arc-shaped head (111) is arc-shaped. The connecting column (112) is connected to the steering knuckle (14).

3. A quick-release device for low-voltage current transformers in substations according to claim 2, characterized in that: The working surface of the arc-shaped head (111) is provided with a slot (113), the bottom of the slot (113) is provided with a magnetic block (114), the opening of the slot (113) is provided with a guide slope, and the slot (113) is used to hold the head of the bolt.

4. A quick-release device for low-voltage current transformers in substations according to claim 1, characterized in that: The end of the steering shaft (12) is provided with a mounting sleeve (121) for mounting power tools.

5. A quick-release device for low-voltage current transformers in substations according to claim 1, characterized in that: The tail support (13) includes a front frame (131), a middle frame (132) and a rear frame (133). The front frame (131) is fixedly installed on the connecting seat (23), the middle frame (132) is fixedly installed between the front frame (131) and the rear frame (133), and the rear frame (133) is provided with gripping holes.

6. A quick-release device for low-voltage current transformers in substations according to claim 1, characterized in that: The steering knuckle (14) includes a driven knuckle (141) and a driving knuckle (142). The driven knuckle (141) and the driving knuckle (142) are connected by a connecting knuckle (143). The driving knuckle (142) is provided with a side bracket (144). A remotely controlled servo motor (145) is installed on the side bracket (144). The output shaft of the servo motor (145) is connected to the connecting knuckle (143) and can drive the connecting knuckle (143) and the driven knuckle (141) to rotate.

7. A quick-release device for low-voltage current transformers in substations according to claim 1, characterized in that: The adapter shaft (12) is provided with a diagonal brace sleeve (4), the lower end of which is hinged to the diagonal brace rod (41), and the lower end of the diagonal brace rod (41) is supported on the corresponding support groove of the support plate (22).

8. A quick-release device for a low-voltage current transformer in a substation according to claim 1, characterized in that: The bottom of the vertical rod (31) is inserted into the sleeve (311), and the sleeve (311) is fixedly installed on the support base (21).

9. A quick-release device for a low-voltage current transformer in a substation according to claim 1, characterized in that: The transverse rod (32) is provided with a groove (321), and the groove (321) is provided with several parallel grooves. The groove (321) is used to insert the insert (322).

10. A quick-release device for a low-voltage current transformer in a substation according to claim 1, characterized in that: The top of the vertical rod (31) is provided with a cylinder (312), and the horizontal rod (32) is inserted into the cylinder (312).

Images