Arc-resistant combined mutual inductor

Abstract

The utility model relates to the technical field of combined mutual inductors, in particular to an arc-resistant combined mutual inductor which comprises a frame, the top of the frame is detachably connected with a combined mutual inductor body, an outer shell of the combined mutual inductor body is of an outdoor silicon rubber pouring totally-closed supporting column type structure, and a locking assembly is arranged in the frame and comprises a rectangular shell. A two-way lead screw is connected into the rectangular shell, rectangular moving blocks are connected to two threaded areas of the two-way lead screw in a threaded mode, and circular positioning rods are arranged on the opposite side faces of the two rectangular moving blocks. According to the arc-resistant combined mutual inductor, through the locking assembly and the rectangular connecting block, an operator can easily disassemble and assemble the mutual inductor assembly, tedious steps in traditional operation are reduced, the maintenance efficiency is improved, the downtime of equipment is shortened, and the stability and operability of system operation are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of combined transformers, and specifically relates to an arc-resistant combined transformer. Background Technique

[0002] A combined transformer is a power device that integrates a voltage transformer and a current transformer. It is widely used in the power system to measure parameters such as voltage, current, and power, and to achieve the protection and control functions of the power system. By combining the voltage transformer and the current transformer in the same device, the combined transformer can effectively save space, reduce the complexity of equipment installation and maintenance, improve the integration and stability of the system, and thus is widely used in high-voltage transmission lines, substations, and various power facilities.

[0003] The patent with the publication number CN219759320U discloses a 10kV plug-and-play cast combined transformer, including a base. An transformer assembly is arranged above the base, and a fixing mechanism is arranged behind the base; the transformer assembly includes a housing, and a transformer main body is arranged inside the housing. For this 10kV plug-and-play cast combined transformer, by setting the housing as an outdoor silicone rubber cast fully enclosed pillar structure, the product has the advantages of arc resistance, ultraviolet resistance, aging resistance, and long service life, replacing the oil insulation structure of the traditional oil-immersed metering box, overcoming the problem of oil leakage of the traditional metering box, improving the water leakage problem of the stainless steel shell metering box, and making the metering box a truly maintenance-free product; by setting the incoming and outgoing lines of the transformer assembly as elbow plug sockets, the insulation and safety are effectively improved, preventing the possibility of primary short circuit caused by foreign flying objects and electric shock to personnel during maintenance.

[0004] The above-mentioned prior art makes the combined transformer have the advantages of arc resistance, ultraviolet resistance, aging resistance, and long service life by setting the housing as an outdoor silicone rubber cast fully enclosed pillar structure. However, there are still several defects in the structural design of the prior art: First, the design of the base and the fixing mechanism for installing the transformer assembly is relatively complex. The double-headed screw and the screw are exposed for a long time, which is easy to adhere to dust or rust and corrode, thus affecting their normal use; Second, when disassembling the transformer assembly, multiple steps need to be performed in sequence, including loosening bolts, releasing the pressure plate positioning, operating bevel gears and double-headed screws, etc. This operation process makes the disassembly cumbersome, increasing the difficulty and time cost of equipment maintenance. In view of this, we propose an arc-resistant combined transformer. Content of the Utility Model

[0005] The purpose of the utility model is to provide an arc-resistant combined transformer to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An arc-resistant combined mutual inductor, comprising a frame-shaped structure. The frame-shaped structure serves as the support framework for the entire combined mutual inductor, providing necessary structural stability, ensuring that all components remain firm during operation, and at the same time providing a basis for the installation and operation of other components. A combined mutual inductor body is detachably connected to the top of the frame-shaped structure. The outer shell of the combined mutual inductor body is an outdoor silicone rubber cast fully enclosed pillar type structure. The combined mutual inductor body is the key part of this equipment, responsible for the accurate measurement of voltage and current. Its design adopts an outdoor silicone rubber cast fully enclosed pillar type structure, with excellent arc resistance, ultraviolet resistance and aging resistance properties, ensuring the reliability and long service life of the equipment in harsh environments;

[0008] A fixed bottom plate is fixedly connected to the bottom of the combined mutual inductor body. The fixed bottom plate serves as a basic component of the combined mutual inductor body, providing stable bottom support, preventing the equipment from generating displacement during operation, and ensuring the accuracy and safety of the mutual inductor. Rectangular connection blocks are provided at the bottom of the fixed bottom plate and near the left and right sides. The rectangular connection blocks are used to connect the combined mutual inductor body to the frame-shaped structure, playing a role of fixation and positioning, ensuring the correct installation of the combined mutual inductor in the frame-shaped structure. Circular slots are provided on the opposite sides of the two rectangular connection blocks. The circular slots provide insertion positions for circular positioning rods, ensuring that the circular positioning rods can effectively combine with the rectangular connection blocks, providing support for the stability of the mutual inductor;

[0009] A locking component is provided inside the frame-shaped structure. The locking component is responsible for controlling the fixing and unlocking of the combined transformer body, ensuring the safety of the equipment during operation and facilitating the later disassembly of the combined transformer body. The locking component includes a rectangular housing which is horizontally arranged. In the middle of the interior of the rectangular housing, there are two partition plates arranged symmetrically left and right. The two partition plates are jointly connected to a bidirectional lead screw to allow the bidirectional lead screw to move smoothly. On the outer wall of the bidirectional lead screw and near the middle position, there is a driven bevel gear. Both threaded areas of the bidirectional lead screw are threadedly connected with rectangular moving blocks. On the opposite sides of the two rectangular moving blocks, there are circular positioning rods. The opposite ends of the two circular positioning rods penetrate through the inner wall of the rectangular housing and are respectively inserted into two circular slots. In the middle of the front side of the rectangular housing, there is a driving rod rotatably connected. At the rear end of the driving rod, there is a driving bevel gear meshing and driving with the driven bevel gear. The driving rod is used to transmit the operating force of the user to drive the driving bevel gear to rotate. The driving bevel gear drives the driven bevel gear to rotate, so that the driven bevel gear drives the bidirectional lead screw to rotate. The bidirectional lead screw drives the two rectangular moving blocks to move synchronously relative to each other or in the opposite direction, so that the two rectangular moving blocks respectively drive the two circular positioning rods to move synchronously. When the opposite ends of the two circular positioning rods are respectively inserted into the two circular slots, the positions of the two rectangular connecting blocks are fixed. When the opposite ends of the two circular positioning rods are respectively removed from the two circular slots, the fixing of the two rectangular connecting blocks can be released. At this time, the staff only needs to move the combined transformer body upward to complete the disassembly of the combined transformer body.

[0010] Preferably, two rectangular holes arranged symmetrically left and right are opened at the top of the frame-shaped structure. The two rectangular connecting blocks respectively pass through the two rectangular holes into the frame-shaped structure.

[0011] Preferably, U-shaped bases are provided at the bottom of the frame-shaped structure and near the left and right sides. A plurality of mounting holes for bolts to pass through are opened on the U-shaped bases. The U-shaped bases provide stable support for the frame-shaped structure, enhance the overall stability of the equipment, and are designed with mounting holes for easy fixing and installation.

[0012] Preferably, connecting top plates are provided at the top of the rectangular housing and near the left and right ends. The top of the connecting top plates is fixedly connected to the top of the inner wall of the frame-shaped structure. The connecting top plates are used to fixedly connect the rectangular housing to the top of the frame-shaped structure to enhance the stability of the housing.

[0013] Preferably, connecting bottom plates are provided at the bottom of the rectangular housing and near the left and right ends. The bottom of the connecting bottom plates is fixedly connected to the bottom of the inner wall of the frame-shaped structure. The connecting bottom plates firmly fix the rectangular housing at the bottom of the inner wall of the frame-shaped structure to provide support and enhance the overall structural strength of the transformer.

[0014] Preferably, the outer wall of the rectangular moving block fits against the inner wall of the rectangular housing to ensure that the rectangular moving block is stably driven by the bidirectional lead screw. A circular avoidance groove for avoiding the bidirectional lead screw is provided in the circular positioning rod, enabling the circular positioning rod to move left and right and preventing it from being obstructed by the bidirectional lead screw.

[0015] Preferably, a first annular sealing rubber pad is provided at the connection between the driving rod and the rectangular housing. The driving rod can rotate relative to the first annular sealing rubber pad, serving as a seal to prevent external moisture and dust from entering and improving the protection performance of the device.

[0016] Preferably, a second annular sealing rubber pad is provided at the connection between the circular positioning rod and the rectangular housing. The circular positioning rod can slide relative to the second annular sealing rubber pad, providing a sealing function to ensure that the internal structure is not affected by the external environment.

[0017] Preferably, second bearings are provided at the connections between the bidirectional lead screw and the two partition plates. The second bearings are used to support the bidirectional lead screw, ensuring its stability during rotation, reducing wear, and extending its service life.

[0018] Preferably, the locking assembly further includes a fixed vertical plate fixedly connected to the bottom of the inner wall of the frame-shaped structure. The front end of the driving rod passes through the rear side of the fixed vertical plate and is fixedly connected with a knob, facilitating the operator to rotate the driving rod. A first bearing is provided at the connection between the driving rod and the fixed vertical plate. The first bearing supports the rotation of the driving rod, reducing the frictional resistance and ensuring that the driving rod can move smoothly during operation, thereby improving the efficiency of the entire locking system.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. For this arc-resistant combined mutual inductor, through the locking assembly and the rectangular connecting block, the operator can easily disassemble and install the mutual inductor assembly, reducing the cumbersome steps in traditional operations. This design not only improves the maintenance efficiency but also reduces the equipment downtime, further enhancing the stability and operability of the system operation.

[0021] 2. For this arc-resistant combined mutual inductor, the locking mechanism of the locking assembly and the rectangular moving block is adopted to ensure that the mutual inductor body remains stable during operation, preventing the device from being displaced due to vibration or other external forces. Bearings and sealing rubber pads are also used in the locking assembly, reducing the wear of rotating components and the erosion of the external environment on the internal structure, further improving the safety of the device.

[0022] 3. The arc-resistant combined mutual inductor effectively prevents external dust, moisture, etc. from entering the equipment by setting the first annular sealing rubber pad and the second annular sealing rubber pad, improving the protection performance of the equipment. This design is particularly suitable for the mutual inductor device in harsh outdoor environments, enabling it to operate stably for a long time.

[0023] 4. The arc-resistant combined mutual inductor has an outdoor silicone rubber cast full-closed pillar structure for the housing of the combined mutual inductor body, with properties such as arc resistance, ultraviolet resistance, and aging resistance, and can maintain reliability and a long service life in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0025] Figure 2 is a schematic diagram of the overall exploded structure of the present utility model;

[0026] Figure 3 is a schematic diagram of a partial structure of the present utility model;

[0027] Figure 4 is a schematic diagram of the structure of the locking component in the present utility model;

[0028] Figure 5 is a schematic cross-sectional structure diagram of the rectangular housing in the present utility model;

[0029] Figure 6 is a schematic diagram of a partial structure of the locking component in the present utility model;

[0030] In the figure: 1. Frame-shaped frame; 10. Rectangular hole; 2. Combined mutual inductor body; 3. Fixed bottom plate; 30. Rectangular connecting block; 300. Circular slot; 4. Locking component; 40. Rectangular housing; 41. Partition; 42. Bidirectional lead screw; 43. Rectangular moving block; 44. Circular positioning rod; 440. Circular avoidance groove; 45. Driving rod; 46. Driven bevel gear; 47. Driving bevel gear; 48. Knob; 49. Fixed vertical plate; 400. Connecting top plate; 401. Connecting bottom plate; 402. First bearing; 403. Second bearing; 404. First annular sealing rubber pad; 405. Second annular sealing rubber pad; 5. U-shaped base; 50. Mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0033] Please refer to Figures 1-6 , the present utility model provides a technical solution:

[0034] An arc-resistant combined mutual inductor, including a frame-shaped frame 1. The frame-shaped frame 1 serves as the support frame for the entire combined mutual inductor, providing necessary structural stability, ensuring that all components remain firm during operation, and at the same time providing a basis for the installation and operation of other components. The top of the frame-shaped frame 1 is detachably connected with a combined mutual inductor body 2. The outer shell of the combined mutual inductor body 2 is an outdoor silicone rubber cast full-closed pillar type structure. The combined mutual inductor body 2 is the key part of this device, responsible for the accurate measurement of voltage and current. Its design adopts an outdoor silicone rubber cast full-closed pillar type structure, with excellent arc resistance, ultraviolet resistance and aging resistance, ensuring the reliability and long service life of the device in harsh environments;

[0035] The bottom of the combined mutual inductor body 2 is fixedly connected with a fixed bottom plate 3. The fixed bottom plate 3 serves as the basic component of the combined mutual inductor body 2, providing stable bottom support, preventing the device from generating displacement during operation, and ensuring the accuracy and safety of the mutual inductor. Rectangular connection blocks 30 are provided at positions near the left and right sides of the bottom of the fixed bottom plate 3. The rectangular connection blocks 30 are used to connect the combined mutual inductor body 2 with the frame-shaped frame 1, playing a role of fixing and positioning, ensuring the correct installation of the combined mutual inductor in the frame-shaped frame. Circular slots 300 are opened on the opposite sides of the two rectangular connection blocks 30. The circular slots 300 provide insertion positions for the circular positioning rods 44, ensuring that the circular positioning rods 44 can effectively combine with the rectangular connection blocks 30 and providing support for the stability of the mutual inductor;

[0036] A locking component 4 is provided inside the frame-shaped rack 1. The locking component 4 is responsible for controlling the fixation and unlocking of the combined transformer body 2, ensuring the safety of the equipment in the working state and facilitating the later disassembly of the combined transformer body 2. The locking component 4 includes a rectangular housing 40 which is horizontally arranged. In the middle of the interior of the rectangular housing 40, there are two partitions 41 arranged symmetrically left and right. The two partitions 41 are jointly connected with a bidirectional lead screw 42 to allow the bidirectional lead screw 42 to move smoothly. On the outer wall of the bidirectional lead screw 42 and near the middle position, there is a driven bevel gear 46. Both threaded areas of the bidirectional lead screw 42 are threadedly connected with rectangular moving blocks 43. On the opposite sides of the two rectangular moving blocks 43, there are circular positioning rods 44. The opposite ends of the two circular positioning rods 44 penetrate through the inner wall of the rectangular housing 40 and are respectively inserted into two circular slots 300. In the middle of the front side of the rectangular housing 40, there is a driving rod 45 rotatably connected. At the rear end of the driving rod 45, there is a driving bevel gear 47 meshing and driving with the driven bevel gear 46. The driving rod 45 is used to transmit the operating force of the user to drive the driving bevel gear 47 to rotate. The driving bevel gear 47 drives the driven bevel gear 46 to rotate, so that the driven bevel gear 46 drives the bidirectional lead screw 42 to rotate. The bidirectional lead screw 42 drives the two rectangular moving blocks 43 to move synchronously relative to each other or in the opposite direction, so that the two rectangular moving blocks 43 respectively drive the two circular positioning rods 44 to move synchronously. When the opposite ends of the two circular positioning rods 44 are respectively inserted into the two circular slots 300, the positions of the two rectangular connecting blocks 30 are fixed. When the opposite ends of the two circular positioning rods 44 are respectively removed from the two circular slots 300, the fixation of the two rectangular connecting blocks 30 can be released. At this time, the staff only needs to move the combined transformer body 2 upward to complete the disassembly of the combined transformer body 2.

[0037] In this embodiment, two rectangular holes 10 arranged symmetrically left and right are opened at the top of the frame-shaped rack 1. The two rectangular connecting blocks 30 respectively pass through the two rectangular holes 10 into the frame-shaped rack 1.

[0038] Specifically, U-shaped bases 5 are provided at the bottom of the frame-shaped rack 1 and near the left and right sides. A plurality of mounting holes 50 for bolts to pass through are opened on the U-shaped bases 5. The U-shaped bases 5 provide stable support for the frame-shaped rack 1, enhance the overall stability of the equipment, and at the same time, the mounting holes 50 are designed for easy fixation and installation.

[0039] Furthermore, connecting top plates 400 are provided at the top of the rectangular housing 40 and near the left and right ends. The top of the connecting top plates 400 is fixedly connected to the top of the inner wall of the frame-shaped rack 1. The connecting top plates 400 are used to fixedly connect the rectangular housing 40 to the top of the frame-shaped rack 1, enhancing the stability of the housing.

[0040] Furthermore, connecting base plates 401 are provided at the bottom of the rectangular housing 40 near both left and right ends. The bottom of the connecting base plate 401 is fixedly connected to the bottom of the inner wall of the frame-shaped rack 1. The connecting base plate 401 firmly fixes the rectangular housing 40 to the bottom of the inner wall of the frame-shaped rack 1, providing support and enhancing the overall structural strength of the current transformer.

[0041] Furthermore, the outer wall of the rectangular moving block 43 is in contact with the inner wall of the rectangular housing 40 to ensure that the rectangular moving block 43 is stably driven by the bidirectional lead screw 42. A circular avoidance groove 440 for avoiding the bidirectional lead screw 42 is formed in the circular positioning rod 44, enabling the circular positioning rod 44 to move left and right and preventing it from being obstructed by the bidirectional lead screw 42.

[0042] Furthermore, a first annular sealing rubber pad 404 is provided at the connection between the driving rod 45 and the rectangular housing 40. The driving rod 45 can rotate relative to the first annular sealing rubber pad 404, playing a sealing role to prevent external moisture and dust from entering and improving the protection performance of the device.

[0043] Furthermore, a second annular sealing rubber pad 405 is provided at the connection between the circular positioning rod 44 and the rectangular housing 40. The circular positioning rod 44 can slide relative to the second annular sealing rubber pad 405, providing a sealing effect to ensure that the internal structure is not affected by the external environment.

[0044] Furthermore, second bearings 403 are provided at the connections between the bidirectional lead screw 42 and the two partition plates 41. The second bearings 403 are used to support the bidirectional lead screw 42, ensuring its stability during rotation, reducing wear, and extending its service life.

[0045] Furthermore, the locking assembly 4 further includes a fixed vertical plate 49 fixedly connected to the bottom of the inner wall of the frame-shaped rack 1. The front end of the driving rod 45 passes through the rear side of the fixed vertical plate 49 and is fixedly connected to a knob 48, facilitating the staff to rotate the driving rod 45. A first bearing 402 is provided at the connection between the driving rod 45 and the fixed vertical plate 49. The first bearing 402 supports the rotation of the driving rod 45, reducing the frictional resistance and ensuring that the driving rod 45 can move smoothly during operation, thereby improving the efficiency of the entire locking system.

[0046] When the arc-resistant combined mutual inductor of this embodiment is in use, the frame-shaped frame 1 and the combined mutual inductor body 2 are assembled. The frame-shaped frame 1 serves as the support structure of the entire device to ensure its stability. The combined mutual inductor body 2 is fixed in the frame-shaped frame 1 through the fixed bottom plate 3 and the rectangular connection block 30 at the bottom. The two rectangular connection blocks 30 enter the frame-shaped frame 1 through the corresponding rectangular holes 10. The locking component 4 is used to firmly fix the combined mutual inductor body 2. Rotate the driving rod 45 to drive the driving bevel gear 47, drive the driven bevel gear 46, and then rotate the bidirectional lead screw 42. The rotation of the bidirectional lead screw 42 drives the movement of the two rectangular moving blocks 43, so that the circular positioning rod 44 is inserted into the circular slot 300 of the rectangular connection block 30 to complete the locking of the combined mutual inductor body 2. This process ensures that the combined mutual inductor body 2 remains stable during operation and avoids the displacement of the device position caused by external vibration or external force. When the combined mutual inductor body 2 is installed and locked, the device can operate normally. The outer shell of the combined mutual inductor body 2 adopts an outdoor silicone rubber fully enclosed post type structure, which has the advantages of arc resistance, ultraviolet resistance, and aging resistance, ensuring that the device can operate stably in harsh environments. During operation, the first annular sealing rubber pad 404 and the second annular sealing rubber pad 405 ensure that external dust and moisture cannot enter the device interior, thereby improving the protection performance of the device, especially suitable for long-term use in outdoor harsh environments. When maintenance or replacement of the device is required, the operator can disassemble it by reverse operation of the locking component 4. By rotating the driving rod 45, the bidirectional lead screw 42 is rotated in the reverse direction to drive the movement of the rectangular moving block 43, so that the circular positioning rod 44 is removed from the circular slot 300. At this time, the connection between the combined mutual inductor body 2 and the frame-shaped frame 1 is released, and the operator can easily lift and disassemble the device for maintenance or replacement. The entire disassembly process is simple and efficient, reducing the complexity of device maintenance and downtime. After the maintenance or replacement is completed, according to the initial installation steps, the combined mutual inductor body 2 is placed back on the frame-shaped frame 1 and fixed using the locking component 4. Through these steps, the normal use and efficient maintenance of the arc-resistant combined mutual inductor can be ensured, while improving the measurement accuracy and operation stability of the power system.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. An arc-resistant combined mutual inductor, comprising a frame-shaped frame (1), a combined mutual inductor body (2) is detachably connected to the top of the frame-shaped frame (1), and the outer shell of the combined mutual inductor body (2) is an outdoor silicone rubber cast fully enclosed pillar type structure, characterized in that: The bottom of the combined current transformer body (2) is fixedly connected with a fixed bottom plate (3). At positions near the left and right sides of the bottom of the fixed bottom plate (3), rectangular connecting blocks (30) are provided. Circular slots (300) are formed on the opposite side surfaces of the two rectangular connecting blocks (30). A locking component (4) is arranged in the frame-shaped rack (1). The locking component (4) includes a rectangular shell (40). In the middle of the interior of the rectangular shell (40), two partition plates (41) arranged symmetrically left and right are provided. The two partition plates (41) are jointly connected with a bidirectional lead screw (42). A driven bevel gear (46) is arranged on the outer wall of the bidirectional lead screw (42) near the middle position. Rectangular moving blocks (43) are in threaded connection with both threaded areas of the bidirectional lead screw (42). Circular positioning rods (44) are arranged on the opposite side surfaces of the two rectangular moving blocks (43). The opposite end parts of the two circular positioning rods (44) penetrate through the inner wall of the rectangular shell (40) and are respectively inserted into the two circular slots (300). A driving rod (45) is rotatably connected to the middle of the front side of the rectangular shell (40). A driving bevel gear (47) meshing and driving with the driven bevel gear (46) is arranged at the rear end of the driving rod (45).

2. The arc-resistant combined mutual inductor according to claim 1, characterized in that: Two rectangular holes (10) arranged symmetrically left and right are formed at the top of the frame-shaped rack (1). The two rectangular connecting blocks (30) respectively pass through the two rectangular holes (10) and enter the frame-shaped rack (1).

3. The arc-resistant combined mutual inductor according to claim 1, characterized in that: U-shaped bases (5) are arranged at positions near the left and right sides of the bottom of the frame-shaped rack (1). A plurality of mounting holes (50) for bolts to pass through are formed on the U-shaped bases (5).

4. The arc-resistant combined mutual inductor according to claim 1, characterized in that: Connecting top plates (400) are arranged at positions near the left and right ends of the top of the rectangular shell (40). The tops of the connecting top plates (400) are fixedly connected to the top of the inner wall of the frame-shaped rack (1).

5. The arc-resistant combined mutual inductor according to claim 1, wherein: Connecting bottom plates (401) are arranged at positions near the left and right ends of the bottom of the rectangular shell (40). The bottoms of the connecting bottom plates (401) are fixedly connected to the bottom of the inner wall of the frame-shaped rack (1).

6. The arc-resistant combined mutual inductor according to claim 1, characterized in that: The outer wall of the rectangular moving block (43) is in fit with the inner wall of the rectangular shell (40). A circular avoidance groove (440) for avoiding the bidirectional lead screw (42) is formed in the circular positioning rod (44).

7. The arc-resistant combined mutual inductor according to claim 1, characterized in that: A first annular sealing rubber pad (404) is arranged at the connection part between the driving rod (45) and the rectangular shell (40). The driving rod (45) can rotate relative to the first annular sealing rubber pad (404).

8. The arc-resistant combined mutual inductor according to claim 1, characterized in that: A second annular sealing rubber pad (405) is arranged at the connection part between the circular positioning rod (44) and the rectangular shell (40). The circular positioning rod (44) can slide relative to the second annular sealing rubber pad (405).

9. The arc-resistant combined mutual inductor according to claim 1, characterized in that: Second bearings (403) are arranged at the connection parts between the bidirectional lead screw (42) and the two partition plates (41).

10. The arc-resistant combined mutual inductor according to claim 1, characterized in that: The locking component (4) further includes a fixed vertical plate (49) fixedly connected to the bottom of the inner wall of the frame-shaped frame (1). The front end of the driving rod (45) passes through the rear side of the fixed vertical plate (49) and is fixedly connected with a knob (48). A first bearing (402) is provided at the connection between the driving rod (45) and the fixed vertical plate (49).

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