Integrated insulation barrier safety device for replacement of transformers

Abstract

The application relates to a kind of integrated insulation isolation safety devices for replacing transformer, relates to a kind of replacement transformer auxiliary equipment, solves the poor protection safety and poor field adaptability of existing replacement transformer protection tool.The fixed frame is of rectangular structure and is provided with movable opening structure, a threaded hole is formed in the center of a short side;The sliding rod is arranged between the two long sides of the rectangular structure in a sliding connection manner;The clamping screw is arranged in the threaded hole in a threaded connection manner, the front end of the clamping screw is arranged in the middle of the outer side wall of the sliding rod, the relative distance between the sliding rod and the short side structure where the movable opening structure is arranged is changed by rotating the clamping screw;The sliding wheel set is arranged on the inner side wall of the short side structure where the movable opening structure is arranged and the inner side wall of the sliding rod;The insulation isolation plate is fixed on the fixed frame by the connecting mechanism.The beneficial effect is good protection safety, high repair efficiency and strong field adaptability.

Description

Technical Field

[0001] This invention relates to an auxiliary device for replacing transformers. Background Technology

[0002] In the daily operation and emergency repair of the 10kV distribution network system, transformer burnout faults caused by overload, short circuit, insulation aging, lightning strikes, and other factors occur frequently. These are typical sudden and high-impact equipment failures. Once a transformer fails, replacement work must be carried out immediately to quickly restore power supply to the area and ensure the stable operation of the power grid for residential production and daily life. Currently, the replacement work of 10kV distribution network transformers faces the following specific problems:

[0003] 1. The work process is cumbersome, and the emergency response is delayed. Due to the limitations of the transformer platform structure, site space, and safety distance, crane hoisting operations cannot meet the safety distance requirements for live parts. Therefore, professional live-line workers must first perform live-line disconnection or connection operations before the transformer can be hoisted and replaced. This process requires simultaneous initiation of a live-line work application and completion of multiple approval levels, resulting in long travel times for live-line workers and equipment. Furthermore, live-line disconnection and connection are constrained by the qualifications and authority of the person in charge, as well as on-site coordination. These numerous steps and long processing times can easily delay emergency repairs and power restoration, significantly extending the user's power outage duration.

[0004] 2. Insufficient safety protection and significant personal injury risks: Current operations lack comprehensive, integrated insulation and isolation measures for the transformer platform. Only simple protective tools such as conventional small insulating baffles and insulating blankets are used on-site, offering limited protection and incomplete shielding, failing to effectively isolate all live parts such as drop-out switches, leads, and terminals. Workers are prone to electric shock, short circuits, and other safety accidents due to tool contact or misoperation during transformer disassembly and assembly. Furthermore, disconnecting and connecting live leads is a high-risk live operation, further increasing personnel safety risks and psychological burden.

[0005] 3. The protective equipment is outdated and has poor on-site adaptability; existing insulation protection accessories are all modular and fragmented designs, with bulky materials, inconsistent mechanical strength and insulation performance, and no standardized installation structure. On-site installation requires multiple people to cooperate and repeatedly adjust the positioning, making the operation complex and time-consuming; moreover, the adaptability to different pole diameters, transformer specifications, and line layouts is poor, making it difficult to quickly complete full-point, full-coverage insulation protection, which seriously restricts the efficiency of emergency repairs and the reliability of protection.

[0006] In summary, the existing 10kV distribution network transformer replacement work has multiple shortcomings in terms of process efficiency, safety protection, tool compatibility, and cost control. The existing insulation protection methods and operation modes are no longer able to meet the core requirements of high efficiency, safety, convenience, and low cost for emergency fault repair. Summary of the Invention

[0007] The purpose of this invention is to solve the problems of poor safety and poor on-site adaptability of existing protective tools for transformer replacement, and to propose an integrated insulation and isolation safety device for transformer replacement.

[0008] The integrated insulation and isolation safety device for replacing transformers according to the present invention includes a snap-fit ​​unit, an insulation isolation plate, and a connecting mechanism;

[0009] The buckle fixing unit is used to fix the connecting mechanism to the pole. The buckle fixing unit includes a fixing frame, a sliding rod, a clamping screw, and a sliding wheel assembly.

[0010] The fixed frame is a rectangular structure with a movable opening on one of the short sides. A threaded through hole is located at the center of the opposite short side. A sliding rod is slidably connected between the two long sides of the rectangular structure. A clamping screw is threadedly connected to the threaded through hole, and the front end of the clamping screw is rotatably connected to the middle of the outer wall of the sliding rod. Rotating the clamping screw changes the relative distance between the sliding rod and the short side of the movable opening structure. A set of sliding wheels is arranged on the inner wall of the short side of the movable opening structure and on the inner wall of the sliding rod.

[0011] The insulating isolation plate is fixed to the outer side wall of one long side of the fixed frame by a connecting mechanism.

[0012] Furthermore, the sliding wheel assembly includes four sliding wheels and four fixed rods;

[0013] The four sliding wheels are connected to one end of the four fixed rods by pins; the other ends of two fixed rods are fixed to the inner wall of the sliding rod; the other ends of the other two fixed rods are fixed to the inner wall of the short side structure where the movable opening structure is located, and the main shafts of the four sliding wheels are parallel to the main shaft of the pole.

[0014] Furthermore, the insulating isolation plate adopts a plate-shaped structure made of insulating material, which can achieve full coverage of the live parts of the transformer platform.

[0015] Furthermore, the connecting mechanism consists of two cylindrical connecting rods;

[0016] The insulating isolation plate is fixed to one end of two columnar connecting rods, and the two columnar connecting rods are fixed to the outer wall of one long side of the fixed frame through a sliding connecting plate;

[0017] The two ends of the sliding connecting plate are respectively fixed to the side walls of the two sleeves, and the two sleeves are respectively nested on the two cylindrical connecting rods.

[0018] Furthermore, it also includes two limiting bolts;

[0019] Two limit bolts are fixed to the other end of the two cylindrical connecting rods respectively.

[0020] Furthermore, it also includes turning the handle;

[0021] The rotating handle is fixed to the rear end of the clamping screw.

[0022] Furthermore, it also includes locking clips;

[0023] The locking buckle is installed at the joint of the movable opening structure on the short side of the fixed frame. The body of the locking buckle is installed at the end of the movable opening structure on the short side of the fixed frame, and the hanging ring of the locking buckle is fixed on the outer wall of the long side of the fixed frame adjacent to the end of the short side of the movable opening structure.

[0024] Furthermore, the connecting mechanism, the fixed frame, the sliding rod, and the sliding wheel assembly are all made of insulating materials.

[0025] Compared with the prior art, the integrated insulation and isolation safety device for replacing transformers described in this invention has the following key advantages:

[0026] 1. Excellent protection and safety, and high repair efficiency: Through the application of fixed units, insulating isolation plates and connecting mechanisms, the live parts of the transformer platform are isolated, which helps to optimize the original work process, eliminates the need for professional coordination of live work, breaks through the work restrictions of the person in charge, solves the problem of difficult work time coordination, and can shorten the transformer repair time by more than 3 hours, greatly improve the repair efficiency of sudden faults in the distribution network, and reduce the economic losses and impact on people's livelihood caused by power outages.

[0027] 2. Integrated structure and strong field adaptability: The design integrates the fixing unit and the insulation isolation unit, breaking through the technical limitations of the mutual cooperation of insulation protection tools. The fixing unit is compatible with mainstream pole sizes and transformer platforms of different specifications and layouts, with strong versatility, and can be fully promoted in 10kV distribution network transformer replacement operations.

[0028] 3. Lightweight materials and easy operation: The new lightweight and high-strength insulation materials are used, which significantly reduces the weight compared to existing insulation and protection tools. Each component is designed with a quick-operation structure. The quick-connect structure with locking buckles does not require special tools. A single person can complete the installation, adjustment and disassembly of the device. The operation threshold is low and the deployment time of the device is greatly shortened.

[0029] 4. Comprehensive protection and high safety level: The insulating baffle is 1500*1200mm in size, which can completely block all live parts of the transformer platform that do not meet the safety distance requirements, effectively ensuring the safety measures for transformer replacement operations, completely replacing the original live disconnection and connection operation, eliminating the safety risks of live operation, and greatly improving the safety of operation. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of an integrated insulation and isolation safety device for replacing transformers, as described in Specific Embodiment 1.

[0031] Figure 2 This is a bottom view of an integrated insulation and isolation safety device for replacing a transformer, as described in Specific Embodiment 1.

[0032] Figure 3 This is a left view of an integrated insulation and isolation safety device for replacing a transformer, as described in Specific Embodiment 1.

[0033] Figure 4 This is a schematic diagram of the specific structure of the fixed unit in the open state in the first specific implementation method.

[0034] In the diagram, 1 is the insulating isolation plate; 2 is the connecting mechanism; 3 is the pole; 4 is the fixed frame; 5 is the sliding rod; 6 is the clamping screw; 7 is the sliding wheel; 8 is the fixed rod; 9 is the rotating handle; 10 is the sliding connecting plate; 11 is the locking buckle; and 12 is the limit bolt. Detailed Implementation

[0035] Specific Implementation Method 1: Combination Figures 1 to 4 This embodiment describes an integrated insulation isolation safety device for replacing transformers, comprising a fixing unit, an insulation isolation plate 1, and a connecting mechanism 2.

[0036] The fixing unit is used to fix the connecting mechanism 2 to the pole 3. The fixing unit includes a fixing frame 4, a sliding rod 5, a clamping screw 6, and a sliding wheel assembly.

[0037] The fixed frame 4 is a rectangular structure with a movable opening on one of the short sides. A threaded through hole is provided at the center of the other short side opposite to the movable opening. The sliding rod 5 is slidably connected between the two long sides of the rectangular structure. The clamping screw 6 is threadedly connected to the threaded through hole, and the front end of the clamping screw 6 is rotatably connected to the middle of the outer wall of the sliding rod 5. The relative distance between the sliding rod 5 and the short side structure where the movable opening is located is changed by rotating the clamping screw 6. The sliding wheel assembly is arranged on the inner wall of the short side structure where the movable opening is located and on the inner wall of the sliding rod 5.

[0038] The insulating isolation plate 1 is fixed to the outer side wall of one long side of the fixed frame 4 by the connecting mechanism 2.

[0039] In this embodiment, the fixing unit is the basic fixing module of the device, used to firmly and detachably fix the entire insulation and isolation safety device to the power distribution pole 3. It is the carrier for the installation and adjustment of the insulation isolation plate 1. The core includes a fixing frame 4, a sliding rod 5, a clamping screw 6, and a sliding wheel assembly. The structural design combines sliding adjustment and fixing stability, making it easy to install and highly adaptable. It can accurately adapt to mainstream pole specifications from 190mm to 260mm. The fixing frame 4 is made of a new type of rigid insulating material and is a rectangular frame structure. Its size is precisely matched with the insulation isolation plate 1 to ensure connection stability. One side of the short side of the fixing frame 4 is an open structure with a spring-type buckle for quick fixing. It can be opened and closed manually without special tools, making it easy to fit the entire fixing frame 4 into the pole 3 for initial positioning. The other side of the short side of the fixing frame 4 has a precisely drilled threaded through hole in the middle, which serves as a dedicated installation position for the clamping screw 6. This achieves integrated fixing of the clamping screw 6 and the fixing frame 4, eliminating the problem of loose connection and ensuring the overall structural stability. The clamping screw 6 is installed in the dedicated threaded through hole of the fixed frame 4. It is an adjustable screw-tightening clamping structure, which is suitable for poles 3 with different diameters from 190mm to 260mm. After the sliding wheel group adjusts the fixed frame 4 to the target height, the front end of the clamping screw 6 pushes the sliding rod by tightening, ensuring that the sliding wheel group is tightly fitted to the outer wall of the pole 3. With the buckle locking of the movable opening structure of the fixed frame 4, a triple fixing structure of "wheel group positioning + clamping device locking + buckle fixing" is formed, which completely prevents the device from slipping or falling off due to external force collision or on-site vibration during operation, and ensures the reliability of insulation isolation.

[0040] Specific Implementation Method 2: This implementation method further defines the integrated insulation and isolation safety device for replacing transformers described in Specific Implementation Method 1. In this implementation method, the sliding wheel group includes four sliding wheels 7 and four fixed rods 8.

[0041] The four sliding wheels 7 are respectively connected to one end of the four fixed rods 8 by pins; the other ends of two fixed rods 8 are fixed to the inner wall of the sliding rod 5; the other ends of the other two fixed rods 8 are fixed to the inner wall of the short side structure where the movable opening structure is located, and the main shafts of the four sliding wheels 7 are all parallel to the main shaft of the pole 3.

[0042] In this embodiment, four insulated sliding wheels 7 are evenly arranged inside the fixed frame 4. The wheel body is made of high-strength wear-resistant insulating material and can slide up and down along the outer wall of the pole 3 with a specification of 190mm to 260mm. The four sliding wheels 7 are symmetrically distributed in a rectangle. The pin shafts of the four sliding wheels 7 are parallel to the main shaft (central axis) of the pole 3. This ensures the fit between the fixed frame 4 and the pole 3 and allows the entire fixed unit to slide freely up and down along the pole 3. This makes it easy for operators to quickly adjust the installation position of the device according to the height of the live parts of the transformer platform without repeated disassembly and reassembly, which greatly improves the installation and adjustment efficiency.

[0043] Specific Implementation Method 3: This implementation method further defines the integrated insulation and isolation safety device for replacing transformers described in Specific Implementation Method 1. In this implementation method, the insulation isolation plate 1 adopts a plate-shaped structure made of insulating material, which can achieve full coverage of the live parts of the transformer platform.

[0044] In this embodiment, the insulating isolation plate 1 is the core protection module of the device. It is connected to the fixed unit by a sliding type and can be precisely adjusted in the horizontal direction along the fixed frame 4. It is used to completely shield and insulate all live parts such as the transformer platform drop-out switch and down conductor. The connecting mechanism 2 is adapted to the insulating isolation plate 1. The structural parameters are standardized and the operation is user-friendly. The protection range is fully covered and the adjustment is flexible. The insulating isolation plate 1 is made of a new type of epoxy resin interlayer PMI foam insulation material. The standard size is 1500mm×1200mm. Compared with the original insulating baffle, the weight is reduced by more than 30%, and the insulation withstand voltage level is higher. It can stably withstand the rated voltage of 10kV distribution network without the risk of breakdown or leakage. The baffle is an integral flat plate structure with rounded edges to prevent scratching of operators or distribution network cables. The large size design can completely shield all live parts of the transformer platform, realize the physical isolation of live parts from the transformer replacement operation area, and eliminate the risk of electric shock.

[0045] Specific Implementation Method Four: This implementation method further defines the integrated insulation and isolation safety device for replacing transformers described in Specific Implementation Method One. In this implementation method, the connecting mechanism 2 consists of two cylindrical connecting rods.

[0046] The insulating isolation plate 1 is fixed to one end of two columnar connecting rods, and the two columnar connecting rods are fixed to the outer wall of one long side of the fixed frame 4 through the sliding connecting plate 10;

[0047] The two ends of the sliding connecting plate 10 are respectively fixed to the side walls of the two sleeves, and the two sleeves are respectively nested on the two cylindrical connecting rods.

[0048] In this embodiment, an insulated cylindrical connecting rod is used between the insulating isolation plate 1 and the fixed unit. The connecting rod serves as a connecting component for the sliding guide rail. The connecting rod and the fixed frame 4 are vertically fixed through the sliding connecting plate 10, ensuring a firm connection and smooth sliding. The insulating isolation plate 1 can achieve a maximum horizontal sliding adjustment of 680mm along the fixed frame 4. Operators can achieve precise and full-coverage isolation of the live parts according to the actual layout of the live parts of the transformer platform and the cable routing. It is adaptable to transformer platforms of different specifications and layouts, and has strong versatility and adaptability.

[0049] Specific Implementation Method 5: This implementation method further defines the integrated insulation and isolation safety device for replacing transformers described in Specific Implementation Method 4. In this implementation method, two limiting bolts 12 are also included.

[0050] Two limit bolts 12 are fixed to the other end of the two cylindrical connecting rods respectively.

[0051] In this embodiment, the length of a single column-shaped connecting rod is 1400mm, and the fixed interval between two connecting rods is 400mm. It is made of a new type of lightweight glass fiber insulating material, which combines high strength, high insulation and lightness, effectively reducing the physical exertion of operators. The surface of the rod is treated with anti-slip texture to improve the stability of hand operation. One end of the operating rod is fixedly connected to the back of the insulating baffle in a triangular shape to ensure the connection strength, and the other end is an anti-slip hand operating end. Operators can complete the installation, sliding adjustment and disassembly of the insulating baffle by holding the operating rod. There is no need to come into close contact with live parts throughout the process, which completely ensures the personal safety of operators from the operating end. The limiting bolt 12 prevents the sliding connecting plate 10 from detaching from the two column-shaped connecting rods.

[0052] Specific Implementation Method Six: This implementation method further defines the integrated insulation and isolation safety device for replacing transformers described in Specific Implementation Method One. In this implementation method, it also includes a rotating handle 9.

[0053] The rotating handle 9 is fixed to the rear end of the clamping screw 6.

[0054] In this embodiment, by setting a rotating handle 9 at the rear end of the clamping screw 6, tool-free tightening / loosening is achieved, making the operation more labor-saving and faster, greatly improving the efficiency of locking and disassembly, and making it suitable for rapid deployment and withdrawal in emergency repair scenarios.

[0055] Specific Implementation Method Seven: This implementation method further defines the integrated insulation and isolation safety device for replacing transformers described in Specific Implementation Method One. In this implementation method, a locking buckle 11 is also included.

[0056] The locking buckle 11 is disposed at the joint of the movable opening structure on the short side of the fixed frame 4. The body of the locking buckle 11 is disposed at the end of the movable opening structure on the short side of the fixed frame 4, and the hanging ring of the locking buckle 11 is fixed on the outer wall of the long side of the fixed frame 4 adjacent to the end of the short side of the movable opening structure.

[0057] In this embodiment, the locking buckle 11 enables rapid closing and locking of the movable opening, forming a double locking mechanism with the locking screw 6 to prevent the device from loosening under vibration or impact. Simultaneously, a standardized operating procedure is established, allowing transformer replacement to be completed without live-line work, simplifying the process and shortening repair time. An insulation isolation operation method for uninterrupted transformer replacement in a 10kV distribution network includes the following steps:

[0058] 1. The operators arrive at the site with the equipment;

[0059] 2. Open the movable opening structure of the fixed frame 4, install the fixed frame 4 at the designated position on the pole 3, lock the locking buckle 11, and tighten the locking screw 6. Adjust the insulating baffle 1 to completely block the live parts through the connecting mechanism 2.

[0060] 3. Complete the dismantling, hoisting, and replacement of the old and new transformers within the insulated isolation area;

[0061] 4. After the transformer has been replaced and tested to be qualified, loosen the clamping screw 6, open the locking buckle 11, disassemble the device, and complete the emergency repair.

[0062] Specific Implementation Method Eight: This implementation method further defines the integrated insulation and isolation safety device for replacing transformers described in Specific Implementation Method One. In this implementation method, the connecting mechanism 2, the fixed frame 4, the sliding rod 5, and the sliding wheel assembly are all made of insulating materials.

[0063] In this embodiment, all load-bearing and structural components are made of insulating materials, achieving overall insulation of the device, avoiding the risks of electrical conduction and discharge from metal components, meeting the insulation requirements for live-line work on 10kV distribution networks, and further improving the intrinsic safety level of the device.

[0064] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An integrated insulation isolation safety device for replacing transformers, characterized in that, It includes a fixing unit, an insulating isolation plate (1), and a connecting mechanism (2); The fixing unit is used to fix the connecting mechanism (2) to the pole (3). The fixing unit includes a fixing frame (4), a sliding rod (5), a clamping screw (6), and a sliding wheel assembly. The fixed frame (4) is a rectangular structure. A movable opening structure is set on one side of the short side of the rectangular structure, and a threaded through hole is opened at the center of the other short side opposite to the movable opening structure. The sliding rod (5) is set between the two long sides of the rectangular structure in a sliding connection manner. The clamping screw (6) is set together with the threaded through hole in a threaded connection manner, and the front end of the clamping screw (6) is set in the middle of the outer side wall of the sliding rod (5) in a rotatable connection manner. By rotating the clamping screw (6), the relative distance between the sliding rod (5) and the short side structure where the movable opening structure is located is changed. The sliding wheel group is arranged on the inner side wall of the short side structure where the movable opening structure is located and on the inner side wall of the sliding rod (5). The insulating isolation plate (1) is fixed to the outer wall of one long side of the fixed frame (4) by the connecting mechanism (2).

2. The integrated insulation isolation safety device for replacing transformers according to claim 1, characterized in that, The sliding wheel assembly includes four sliding wheels (7) and four fixed rods (8); The four sliding wheels (7) are respectively connected to one end of the four fixed rods (8) by pins; the other end of two fixed rods (8) is fixed on the inner wall of the sliding rod (5); the other end of the other two fixed rods (8) is fixed on the inner wall of the short side structure where the movable opening structure is located, and the main shafts of the four sliding wheels (7) are all parallel to the main shaft of the electric pole (3).

3. The integrated insulation isolation safety device for replacing transformers according to claim 1, characterized in that, The insulating isolation plate (1) is a plate-shaped structure made of insulating material, which can fully cover the live parts of the transformer platform.

4. An integrated insulation isolation safety device for replacing transformers according to claim 1, characterized in that, The connecting mechanism (2) consists of two cylindrical connecting rods; The insulating isolation plate (1) is fixed to one end of two columnar connecting rods, and the two columnar connecting rods are fixed to the outer side wall of one long side of the fixed frame (4) through the sliding connecting plate (10); The two ends of the sliding connecting plate (10) are respectively fixed on the side walls of the two sleeves, and the two sleeves are respectively nested on the two cylindrical connecting rods.

5. An integrated insulation isolation safety device for replacing transformers according to claim 4, characterized in that, It also includes two limiting bolts (12); Two limit bolts (12) are fixed to the other end of the two cylindrical connecting rods respectively.

6. An integrated insulation isolation safety device for replacing transformers according to claim 1, characterized in that, It also includes rotating the handle (9); The rotating handle (9) is fixed to the rear end of the clamping screw (6).

7. An integrated insulation isolation safety device for replacing transformers according to claim 1, characterized in that, It also includes a locking buckle (11); The locking buckle (11) is set at the joint of the short side movable opening structure of the fixed frame (4). The body of the locking buckle (11) is set at the short side end of the movable opening structure of the fixed frame (4), and the hanging ring of the locking buckle (11) is fixed on the outer side wall of the long side of the fixed frame (4) adjacent to the short side end of the movable opening structure.

8. An integrated insulation isolation safety device for replacing transformers according to claim 1, characterized in that, The connecting mechanism (2), the fixed frame (4), the sliding rod (5) and the sliding wheel assembly are all made of insulating materials.

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