A photovoltaic power station box transformer handover test bus dismounting device

Abstract

The utility model provides a kind of photovoltaic power station box transformer handover test bus dismounting device, belong to dismounting device technical field, the photovoltaic power station box transformer handover test bus dismounting device includes: bus bridge shell body, its lateral wall inner surface is equipped with the receiving cavity extending along shell longitudinal direction;Ω-shaped lifting eye, the both ends of this lifting eye are pivoted in the pivot seat of the receiving cavity, and can be 180 ° rotation around this pivot seat between the hidden position of being completely embedded receiving cavity and the stress position of being turned outward;Torsion spring, it is set in the pivot seat and with its one end abutting receiving cavity wall, the other end abuts lifting eye;Lock arm, rotatably set in lifting eye root portion, and eccentric cam is formed in lock arm front end;Clamping groove, it is opened in the outer periphery of bus terminal shell, and it is matched with the eccentric cam;When lifting eye is in hidden position, eccentric cam is embedded clamping groove to lock bus terminal;Solve the problem that traditional exposed lifting eye dismounting mode needs many people to cooperate, is easy to collide and corrode and is cumbersome to operate.

Description

Technical Field

[0001] This utility model belongs to the field of dismantling device technology, specifically, it relates to a dismantling device for the busbar of a photovoltaic power station transformer handover test. Background Technology

[0002] The handover test of a photovoltaic power station's prefabricated transformer is a comprehensive verification procedure that must be carried out after the prefabricated transformer and its supporting busbar system are installed and before they are officially put into operation. The core purpose of the test is to confirm the continuity, insulation level, mechanical strength, and reliability of each connection part of the busbar circuit, thereby ensuring the safety and stability of subsequent grid-connected operation. During the test, technicians need to repeatedly disassemble and reassemble the busbar terminals and the prefabricated transformer bushings to perform insulation resistance measurements, contact resistance tests, and withstand voltage tests. Because prefabricated transformers are usually located in narrow outdoor spaces, and the busbar sections are heavy and the porcelain bushings are brittle, traditional disassembly methods have revealed many drawbacks.

[0003] Traditional dismantling devices typically employ exposed lifting rings in conjunction with manual hoists or pry bars. These rings, constantly exposed to the outside of the casing, are susceptible to deformation from collisions with vehicles or pedestrians, and accumulate dust and rainwater, leading to corrosion and jamming. Dismantling often requires multiple people: one to hold the pry bar steady, another to operate the hoist, and a third to monitor safety—a labor-intensive and cumbersome process. Exposed lifting rings also pose a risk of misoperation; accidental contact outside of maintenance hours can prematurely loosen busbar terminals, causing poor contact or insulation damage. Furthermore, traditional lifting rings lack a synchronized unlocking mechanism between the lifting ring and the busbar terminal. Dismantling requires first forcibly loosening the terminal with a pry bar before pulling out the lifting ring, which easily creates localized stress concentration between the pry bar and the porcelain bushing, causing cracks or even breakage of the bushing. Utility Model Content

[0004] In view of this, the present invention provides a photovoltaic power station transformer box-type busbar dismantling device for handover test, which solves the problems of traditional exposed lifting ring dismantling methods requiring multiple people to work together, being prone to collision and corrosion, and being cumbersome to operate.

[0005] This utility model is implemented as follows: This utility model provides a busbar disassembly device for photovoltaic power station transformer handover test, comprising: The busbar bridge housing has a storage cavity extending longitudinally along the inner surface of its side wall; Ω-shaped lifting ring, the two ends of which are pivotally connected to the pivot seat of the storage cavity, and can rotate 180° around the pivot seat between the hidden position fully embedded in the storage cavity and the force-bearing position of being flipped outward; A torsion spring is sleeved on the pivot seat with one end abutting against the wall of the receiving cavity and the other end abutting against the lifting ring, continuously applying torque to push the lifting ring to the force-bearing position; The locking arm is rotatably fitted onto the base of the lifting ring, and an eccentric cam is formed at the front end of the locking arm; A slot is formed on the outer periphery of the bus terminal housing and cooperates with the eccentric cam; When the lifting ring is in the hidden position, the eccentric cam engages with the slot to lock the bus terminal; when the lifting ring rotates from the hidden position to the stressed position, the eccentric cam simultaneously disengages from the slot to release the lock, allowing the bus terminal to be rotated out in the horizontal direction.

[0006] The technical advantages of the photovoltaic power station transformer box-type busbar dismantling device provided by this utility model are as follows: By completely hiding the Ω-shaped lifting ring in the housing cavity and linking it with the torsion spring, locking arm and eccentric cam, the device has no protrusions in appearance and does not occupy extra space during operation, avoiding the problem of traditional exposed lifting rings being easily touched or accumulating dust; when it is necessary to dismantle the busbar, only one hand needs to rotate the lifting ring, the torsion spring instantly releases the torque, the eccentric cam simultaneously exits the slot, and the lifting ring automatically springs up to become the force fulcrum, one person can horizontally rotate out the entire busbar without carrying additional lifting tools, significantly saving labor, shortening power outage time and reducing the risk of high-altitude operations.

[0007] Based on the above technical solution, the photovoltaic power station transformer box-type busbar disassembly device of this utility model can be further improved as follows: The storage cavity is formed by an arc-shaped groove along the longitudinal direction of the shell, which matches the outline of the Ω-shaped lifting ring. The opening width of the groove is smaller than the maximum outer diameter of the lifting ring to prevent the lifting ring from accidentally popping out when not in operation.

[0008] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the arc-shaped groove matches the outline of the lifting ring and the opening width is smaller than the maximum outer diameter of the lifting ring, so that the lifting ring is completely covered by the side wall of the housing when not in operation, preventing the lifting ring from popping out or being damaged due to accidental collisions by vehicles or personnel. At the same time, it completely eliminates the possibility of rainwater and sand entering the housing through the gaps in the lifting ring, thereby improving the reliability of the device in long-term operation.

[0009] Furthermore, the pivot seat includes blind holes arranged at both ends of the receiving cavity and coaxially aligned. The inner wall of the blind hole is provided with an annular limiting shoulder for axially constraining the torsion spring and limiting the axial movement of the lifting ring.

[0010] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the blind holes are arranged coaxially to form an annular limiting shoulder, which simplifies the machining and assembly of the pivot seat, and uses the depth of the blind holes themselves and the limiting shoulder to jointly constrain the axial position of the torsion spring and the lifting ring, avoiding lateral movement caused by running vibration, thereby ensuring that the lifting ring flipping action is always smooth and without jamming, and extending the service life of the torsion spring and the pivot.

[0011] Furthermore, the root of the lifting ring is provided with a radial boss, and the locking arm is sleeved on the outer periphery of the boss. A damping washer is arranged between the boss and the locking arm so that the locking arm remains stationary when no external force is applied.

[0012] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the cooperation between the radial boss and the damping washer provides moderate rotational resistance to the locking arm, so that the locking arm will not rotate spontaneously due to slight vibration during transportation or operation, ensuring that the eccentric cam is stably embedded in the slot; at the same time, this resistance will not hinder the smooth rotation during manual operation, realizing "stepless" hand feel control and improving the on-site operation experience.

[0013] Furthermore, the outer contour of the eccentric cam is integrally extended from the front end of the locking arm, and its outer edge curved surface forms a line contact lock with the arc-shaped inner wall surface of the slot to reduce frictional resistance.

[0014] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the eccentric cam is integrally extended from the front end of the locking arm, and its outer curved surface forms a line contact with the inner wall of the slot. The contact stress is concentrated and the frictional resistance is small, which not only ensures reliable locking, but also makes the torque required for unlocking extremely low. The operator can complete the task without the aid of tools, which significantly reduces labor intensity and reduces damage to the porcelain sleeve caused by knocking.

[0015] Furthermore, the slot is an annular groove opened circumferentially along the busbar terminal housing, with the groove opening width gradually decreasing towards the bottom, used to guide the eccentric cam to engage and disengage.

[0016] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the slot adopts an inverted trapezoidal structure with a circumferential annular groove and the groove width gradually decreases towards the bottom of the groove. When the busbar terminal is inserted, it automatically guides the eccentric cam to slide into the locking position, which has high assembly fault tolerance. When disassembling, the conical surface of the side wall of the groove also plays a guiding role, so that the eccentric cam can be easily pushed out, avoiding the "jamming" phenomenon that is easy to occur in traditional straight wall slots, and improving the success rate of disassembly and assembly on the first attempt.

[0017] Furthermore, the opening edge of the storage cavity is chamfered, and the corresponding edge of the hanging ring is rounded to reduce jamming when the hanging ring is flipped.

[0018] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the chamfer of the edge of the storage cavity opening and the rounded corner of the corresponding edge of the lifting ring form a smooth guide surface, eliminating the risk of sharp angle shearing and preventing the operator's hand from being scratched by the sharp corner interference during the lifting ring flipping process; at the same time, the rounded corner structure reduces local stress concentration and improves the fatigue life of the shell and the lifting ring.

[0019] Furthermore, when the lifting ring is in a stressed position, its top arc protrudes from the outer surface of the housing, forming a stress point that can be manually gripped or connected to external lifting devices.

[0020] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: when the lifting ring is in the stress position, the top arc naturally protrudes from the outer surface of the shell, forming a rigid fulcrum that can be directly gripped or attached to the lifting device, eliminating the need for additional steps to find the lifting point; the arc shape conforms to ergonomics, making it easy to grip and apply force with one hand, further shortening the on-site preparation time, and is especially suitable for spaces with limited space or narrow spaces at height.

[0021] Furthermore, an elastic positioning pin is provided between the locking arm and the lifting ring to provide retaining force after the eccentric cam is inserted into the slot, preventing accidental unlocking due to vibration.

[0022] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the elastic positioning pin provides additional holding force after the eccentric cam is embedded in the slot, so that even if the transformer is subjected to continuous vibration during operation, there will be no accidental unlocking due to the rotation of the locking arm, thereby ensuring that the busbar is always in a reliable locked state during transportation and installation before and after the handover test, and enhancing the system safety.

[0023] Furthermore, the busbar bridge housing, lifting ring, locking arm, and eccentric cam are all made of non-magnetic metal materials to reduce the interference of the magnetic field on the busbar current flow.

[0024] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: all key components are made of non-magnetic metal materials, which eliminates the influence of magnetic field concentration on the bus current distribution and avoids eddy current heating and additional losses; at the same time, non-magnetic materials have good mechanical strength and corrosion resistance, and are suitable for outdoor high humidity and high salt spray environments, ensuring long-term stable operation of the device and reducing maintenance costs.

[0025] Compared with existing technologies, the beneficial effects of the photovoltaic power station transformer box-type busbar dismantling device provided by this utility model are as follows: This utility model sets up a storage cavity inside the busbar bridge shell, hiding the Ω-shaped lifting ring in a flip-out manner, and forming an integrated linkage mechanism with the torsion spring, locking arm, and eccentric cam, fundamentally changing the space occupation, collision, and corrosion problems caused by traditional exposed lifting rings. When not in operation, the lifting ring is completely fitted into the storage cavity, with no protrusions, avoiding accidental bumps and preventing rainwater and dust intrusion. When the busbar needs to be dismantled, the operator only needs to rotate the lifting ring with one hand, the torsion spring instantly releases torque, and the eccentric cam simultaneously disengages from the slot of the busbar terminal shell, achieving "one-step unlocking," and the lifting ring automatically pops out to become a rigid force support point. The entire process does not require additional pry bars, hoists, or multiple people; a single person can horizontally rotate out the entire busbar section, significantly reducing power outage time and manpower input. Because the lifting ring's arc-shaped guide surface engages with the opening of the storage cavity during rotation, and the locking arm and eccentric cam use curved line contact, the disassembly force is evenly distributed. The busbar terminals and porcelain bushings no longer experience concentrated impact, significantly reducing the risk of cracking. The use of non-magnetic metal materials eliminates eddy current heating caused by concentrated magnetic fields, ensuring uniform busbar current distribution. The device itself also possesses excellent weather resistance, adapting to high humidity and high salt spray environments. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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.

[0027] Figure 1 This is an example diagram of a busbar dismantling device for a photovoltaic power station transformer handover test. Figure 2 A top view of a busbar disassembly device for a photovoltaic power station transformer handover test; Figure 3 A perspective view of a busbar dismantling device for a photovoltaic power station transformer handover test; The attached diagram lists the components represented by each number as follows: 10. Busbar bridge housing; 11. Slot; 20. Lifting ring; 30. Torsion spring; 40. Locking arm; 41. Eccentric cam. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0029] like Figures 1-3 The diagram shown is an example of a photovoltaic power station transformer box-type busbar disassembly device provided by this utility model, comprising: The busbar bridge housing 10 has a storage cavity extending longitudinally along the inner surface of its side wall; Ω-shaped lifting ring 20, the two ends of which are pivotally connected to the pivot seat of the storage cavity, and can rotate 180° around the pivot seat between the hidden position fully embedded in the storage cavity and the force-bearing position of the outward flipping. A torsion spring 30 is sleeved on the pivot seat with one end abutting against the wall of the receiving cavity and the other end abutting against the lifting ring 20, continuously applying torque to push the lifting ring 20 to the force-bearing position; The locking arm 40 is rotatably sleeved on the base of the lifting ring 20, and the front end of the locking arm 40 forms an eccentric cam 41; The slot 11 is formed on the outer periphery of the bus terminal housing and cooperates with the eccentric cam 41; When the lifting ring 20 is in the hidden position, the eccentric cam 41 is inserted into the slot 11 to lock the bus terminal; when the lifting ring 20 rotates from the hidden position to the force-bearing position, the eccentric cam 41 simultaneously disengages from the slot 11 to release the lock, so that the bus terminal can be rotated out in the horizontal direction.

[0030] In the above technical solution, the storage cavity is opened longitudinally along the shell as an arc-shaped groove that matches the contour of the Ω-shaped lifting ring 20. The opening width of the groove is smaller than the maximum outer diameter of the lifting ring 20 to prevent the lifting ring 20 from accidentally popping out when not in operation.

[0031] Ω-shaped lifting ring: The whole is a round steel bar bent into an "Ω" shape: the two ends are straight handles, and the middle section is an arc handle. The two straight handles are inserted into the above-mentioned blind holes and can rotate around the same axis. The lifting ring can be fully fastened into the storage cavity, so that the outer edge of the handle is flush with the outer surface of the shell; after rotation, the handle flips outward to form a grippable "ear".

[0032] Furthermore, in the above technical solution, the pivot seat includes blind holes arranged at both ends of the receiving cavity and coaxially aligned. The inner wall of the blind hole is provided with an annular limiting shoulder for axially constraining the torsion spring 30 and limiting the axial movement of the lifting ring 20.

[0033] Furthermore, in the above technical solution, the lifting ring 20 has a radial boss at its root, the locking arm 40 is sleeved on the outer periphery of the boss, and a damping washer is arranged between the boss and the locking arm 40 so that the locking arm 40 remains stationary when no external force is applied.

[0034] Furthermore, in the above technical solution, the outer contour of the eccentric cam 41 is integrally extended from the front end of the locking arm 40, and its outer edge curved surface forms a line contact lock with the arc-shaped inner wall surface of the slot 11 to reduce frictional resistance.

[0035] Furthermore, in the above technical solution, the slot 11 is an annular groove opened circumferentially along the busbar terminal housing, and the width of the groove opening gradually decreases towards the bottom of the groove, which is used to guide the eccentric cam 41 to engage and disengage.

[0036] Furthermore, in the above technical solution, the opening edge of the storage cavity is chamfered, and the corresponding edge of the hanging ring 20 is rounded to reduce jamming when the hanging ring 20 is flipped.

[0037] Furthermore, in the above technical solution, when the lifting ring 20 is in the stressed position, its top arc protrudes from the outer surface of the shell, forming a stress point that can be manually grasped or connected to external lifting tools.

[0038] Furthermore, in the above technical solution, an elastic positioning pin is provided between the locking arm 40 and the lifting ring 20 to provide a retaining force after the eccentric cam 41 is inserted into the slot 11, so as to prevent accidental unlocking due to vibration.

[0039] The locking arm is a small, one-piece molded metal component, forming an "L"-shaped bent arm: the short side is a circular sleeve, approximately twice the diameter of the eye ring handle, with a smooth inner hole, which can be rotatably fitted onto the cylindrical section at the base of the eye ring; the long side is the bent arm body, which extends radially from the outer edge of the sleeve and bends forward, forming an eccentric cam at the end—specifically, a gradually thickening arc wedge block. The back arc surface of the wedge block is the locking surface, which fits against the slot arc surface of the busbar terminal housing; the front end of the wedge block transitions into a chamfer for easy entry and exit from the slot.

[0040] Furthermore, in the above technical solution, the busbar bridge housing 10, lifting ring 20, locking arm 40 and eccentric cam 41 are all made of non-magnetic metal materials to reduce the interference of magnetic field on the busbar current flow.

[0041] "Non-magnetic metallic materials" specifically include: austenitic stainless steel, aluminum alloys, copper alloys, and titanium alloys. All of these materials exhibit paramagnetic or weakly magnetic characteristics with a relative permeability of μr≈1, do not produce significant eddy current losses under a 50Hz AC magnetic field, and their corrosion resistance meets the requirements for long-term outdoor operation.

[0042] First embodiment: This embodiment applies the device of this invention to the maintenance platform of a centralized photovoltaic booster station in coastal mudflats. Located in the intertidal zone, the platform experiences high humidity and heavy salt spray year-round, and the narrow space allows only single-person sideways operation. The entire device is integrally cast from austenitic stainless steel, known for its superior corrosion resistance. The busbar bridge housing has an arc-shaped receiving cavity milled into the side wall near the low-voltage bushing, perfectly matching the contour of the Ω-shaped lifting ring. Blind holes at both ends of the receiving cavity serve as pivot seats, and annular limiting shoulders are machined at the bottom of the blind holes. A torsion spring is inserted, with one end abutting the shoulder and the other hooking the root of the lifting ring, creating a pre-tightening torque. The locking arm and the root of the lifting ring are integrally forged and then machined twice. The eccentric cam surface at the front end is polished and locks into contact with the inverted trapezoidal groove of the busbar terminal housing.

[0043] In the actual handover test process, maintenance personnel only need to carry insulated gloves and a torque wrench. Before the test, the busbar terminals are locked: the lifting ring is completely hidden, with no protrusions, and cannot be directly corroded by salt spray; after the test, the personnel rotate the lifting ring about 90 degrees, the torsion spring is released, the eccentric cam smoothly exits the slot, and the lifting ring automatically springs up, exposing the arc-shaped stress section. Due to the soft tidal flat foundation, personnel can manually pull the busbar horizontally outward with the help of the lifting ring, without the need for additional pry bars or hoists, avoiding lateral impact on the porcelain bushing. The entire process can be completed by a single person, reducing the time to one-third of the original solution, and the stainless steel surface of the device showed no rust after the salt spray test, with zero damage to the porcelain bushing.

[0044] Second embodiment: This embodiment deploys the device on the rooftop platform of a residential transformer substation in a mountainous distributed photovoltaic project. This location is at a high altitude with significant diurnal temperature variations, and snow easily accumulates on the equipment surface in winter. To accommodate roof load limitations, the busbar bridge housing is made of high-strength extruded aluminum alloy, and the storage cavity is designed as a shallower, flatter, arc-shaped groove to reduce weight. The pivot seat has been changed from a blind hole to a through-hole structure, with dust covers at both ends to prevent snowmelt infiltration. The torsion spring uses low-temperature tempered stainless steel wire to ensure good elasticity even at -20 degrees Celsius. The locking arm and lifting ring are changed to a separate structure: the locking arm is a precision casting of copper alloy, with chrome plating on the eccentric cam surface to reduce friction; the slot is directly opened on the annular flange of the busbar terminal housing for convenient on-site secondary processing.

[0045] During the handover test, traditional hoisting equipment could not be deployed due to the extremely limited roof space. This device allows for busbar assembly and disassembly by a single operator: before the test, the lifting ring is completely concealed within the recessed area of ​​the aluminum alloy shell, with its top flush with the outer surface of the shell, preventing snow accumulation from creating additional load; after the test, the operator, wearing cold-weather gloves, rotates the lifting ring, instantly releasing the torsion spring, disengaging the eccentric cam from its slot, and allowing the lifting ring to pop out as a rigid fulcrum, which, combined with a simple roof rail, allows the busbar to slide horizontally along the roof slope. The aluminum alloy material reduces the overall weight, facilitating roof handling; the thermal expansion difference between the copper alloy locking arm and the aluminum alloy shell is adaptively compensated by the curved surface of the eccentric cam, ensuring reliable locking and unlocking even under high and low temperature cycles. This embodiment achieved zero impact and zero ceramic cracks in both winter handover tests, and requires no additional heating or snow removal equipment, significantly reducing operation and maintenance costs.

[0046] Specifically, the principle of this utility model is as follows: the core principle of the device is a purely mechanical collaborative mechanism of "torsion spring energy storage - cam linkage - concealed flipping". The storage cavity, as an extension space of the shell, provides a track for the lifting ring to be concealed and flipped; the pivot seat and the torsion spring together constitute an energy storage unit. When the lifting ring is in the concealed position, the torsion spring is compressed and stores energy. Once an external rotational torque is applied, the torsion spring is immediately released and drives the lifting ring to flip around the pivot. The locking arm fitted at the root of the lifting ring is provided with an eccentric cam at its front end. The outer curved surface of the cam forms a self-locking fit with the slot on the busbar terminal shell: when the lifting ring is pressed into the concealed position, the torsion spring is compressed in the opposite direction, and the eccentric cam is embedded into the slot under the guidance of the curved surface, generating a radial locking force to keep the busbar terminal fixed to the shell; when the lifting ring is rotated outward, the torque released by the torsion spring is transmitted to the locking arm through the root of the lifting ring, forcing the eccentric cam to gradually exit the slot along the curved surface trajectory, and the locking force is released instantly; Because the eccentric cam and the slot have a line contact, the frictional resistance is low and the force is evenly distributed. The torque required for unlocking is much lower than that of a traditional pry bar. After the lifting ring is flipped into place, its top arc is naturally exposed, forming a fulcrum for direct gripping or attaching to lifting devices. The lifting ring itself becomes a lever, and the operator only needs to apply a horizontal pulling force to smoothly pull out the busbar terminal. The energy conversion path of the entire process is: manual rotational force - release of torsion spring potential energy - lifting ring flipping - locking arm rotation - eccentric cam unlocking - busbar terminal displacement. All steps are completed at once by the same set of mechanical parts, without any external power or electrical control components, ensuring high reliability and long service life of the device in extreme climates and electromagnetic environments.

Claims

1. A device for dismantling the busbar during the handover test of a photovoltaic power station transformer, characterized in that, include: The busbar bridge housing has a storage cavity extending longitudinally along the inner surface of its side wall; Ω-shaped lifting ring, the two ends of which are pivotally connected to the pivot seat of the storage cavity, and can rotate 180° around the pivot seat between the hidden position fully embedded in the storage cavity and the force-bearing position of being flipped outward; A torsion spring is sleeved on the pivot seat with one end abutting against the wall of the receiving cavity and the other end abutting against the lifting ring, continuously applying torque to push the lifting ring to the force-bearing position; The locking arm is rotatably fitted onto the base of the lifting ring, and an eccentric cam is formed at the front end of the locking arm; A slot is formed on the outer periphery of the bus terminal housing and cooperates with the eccentric cam; When the lifting ring is in the hidden position, the eccentric cam engages with the slot to lock the bus terminal; when the lifting ring rotates from the hidden position to the stressed position, the eccentric cam simultaneously disengages from the slot to release the lock, allowing the bus terminal to be rotated out in the horizontal direction.

2. The photovoltaic power station transformer box-type transformer handover test busbar disassembly device according to claim 1, characterized in that, The storage cavity is formed by an arc-shaped groove along the longitudinal direction of the shell, which matches the contour of the Ω-shaped lifting ring. The opening width of the groove is smaller than the maximum outer diameter of the lifting ring to prevent the lifting ring from accidentally popping out when not in operation.

3. The photovoltaic power station transformer box-type transformer handover test busbar disassembly device according to claim 2, characterized in that, The pivot seat includes blind holes arranged at both ends of the receiving cavity and coaxially aligned. The inner wall of the blind hole is provided with an annular limiting shoulder for axially constraining the torsion spring and limiting the axial movement of the lifting ring.

4. The photovoltaic power station transformer box-type transformer handover test busbar disassembly device according to claim 3, characterized in that, The lifting ring has a radial boss at its root, and the locking arm is sleeved on the outer periphery of the boss. A damping washer is arranged between the boss and the locking arm to keep the locking arm stationary when no external force is applied.

5. The photovoltaic power station transformer box-type transformer handover test busbar disassembly device according to claim 4, characterized in that, The outer contour of the eccentric cam is integrally extended from the front end of the locking arm, and its outer edge curved surface forms a line contact lock with the arc-shaped inner wall surface of the slot to reduce frictional resistance.

6. The photovoltaic power station transformer box-type transformer handover test busbar disassembly device according to claim 5, characterized in that, The slot is an annular groove opened circumferentially along the outer shell of the busbar terminal. The width of the groove opening gradually decreases towards the bottom of the groove, which is used to guide the eccentric cam to engage and disengage.

7. The photovoltaic power station transformer box-type transformer handover test busbar disassembly device according to claim 6, characterized in that, The opening edge of the storage cavity is chamfered, and the corresponding edge of the hanging ring is rounded to reduce jamming when the hanging ring is flipped.

8. The photovoltaic power station transformer box-type transformer handover test busbar disassembly device according to claim 7, characterized in that, When the lifting ring is in a stressed position, its top arc protrudes from the outer surface of the shell, forming a stress point that can be manually gripped or connected to external lifting devices.

9. A photovoltaic power station transformer box-type transformer handover test busbar disassembly device according to claim 8, characterized in that, An elastic positioning pin is provided between the locking arm and the lifting ring to provide holding force after the eccentric cam is inserted into the slot, preventing accidental unlocking due to vibration.

10. A photovoltaic power station transformer box-type transformer handover test busbar disassembly device according to claim 9, characterized in that, The busbar bridge housing, lifting ring, locking arm, and eccentric cam are all made of non-magnetic metal materials to reduce the interference of magnetic fields on the busbar current flow.

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