Built-in mutual inductor mounting structure of transformer

Abstract

The utility model discloses a built-in mutual inductor installation structure of a transformer, and relates to the technical field of transformers, the built-in mutual inductor installation structure of the transformer comprises a supporting frame, an installation cylinder and a mutual inductor assembly, the supporting frame is arranged away from an iron core side column, and the supporting frame is used for being connected with an iron core upper clamping piece and an iron core lower clamping piece; the mounting cylinder is connected with the supporting frame, a containing cavity is formed in the mounting cylinder, and the mutual inductor assembly is arranged in the containing cavity. According to the technical scheme, the mutual inductor assembly is arranged in the containing cavity of the installation cylinder, the installation cylinder is connected to the supporting frame, and the supporting frame is connected to the iron core upper clamping piece and the iron core lower clamping piece, so that the internal space of the transformer oil tank is reasonably utilized to achieve installation of the built-in mutual inductor, the structure is stable, actual operation is simple, and the installation cost is low. The quality and the efficiency are greatly improved, and the quality reliability of products is also improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field especially relates to a transformer built -in mutual -inductor mounting structure. BACKGROUND

[0002] In order to guarantee the safe and economic operation of power system, the operation of power equipment must be monitored and measured, therefore, it is necessary to install current transformer on transformer, and the operation state of equipment is monitored and fault protection through setting current transformer. The built-in current transformer is a kind of special transformer current transformer, and it is mainly used for measuring the current signal of non-star connection winding of transformer, such as the current of medium voltage winding in three-phase autotransformer, three-phase three-winding or double-winding medium angle connection winding. Unlike the bushing current transformer arranged in the elevated seat, the built-in current transformer is arranged inside the transformer oil tank.

[0003] However, with the increase of product capacity and the improvement of protection system sensitivity requirement, the parameter requirement of built-in current transformer assembly is increasingly strict, the size of mutual inductor assembly is also increased accordingly, and a certain space is needed for fixing and installation, and the strength of the fixing structure of mutual inductor assembly needs to be increased. The assembly mode of fixing the insulating wood piece on the clamp piece used in the early industry cannot meet the installation requirement of mutual inductor assembly.

[0004] Therefore, how to meet the installation requirement of mutual inductor is a problem to be solved at present. CONTENT OF UTILITY MODEL

[0005] The utility model discloses a kind of transformer built-in mutual inductor mounting structures, to solve how to meet the problem of the installation requirement of mutual inductor.

[0006] To achieve the above-mentioned purpose, the utility model provides a kind of transformer built-in mutual inductor mounting structure, the transformer built-in mutual inductor mounting structure includes support frame, installation cylinder and mutual inductor assembly, the support frame is set apart from iron core side column, the support frame is used to be connected with iron core upper clamp piece and iron core lower clamp piece, the installation cylinder is connected with the support frame, the installation cylinder is provided with containing cavity, the mutual inductor assembly is set in the containing cavity.

[0007] In an embodiment, the installation cylinder includes cylinder body, fixed plate, supporting plate and pressing plate, the cylinder body and the support frame are connected with the fixed plate, the bottom of the cylinder body is connected with the supporting plate, the top of the cylinder body is connected with the pressing plate, the cylinder body, the pressing plate and the supporting plate are enclosed to form the containing cavity, the containing cavity is provided with the mutual inductor assembly, the supporting plate is provided with wire inlet hole, and the pressing plate is provided with wire outlet hole, so that lead wire can pass through the wire inlet hole, the mutual inductor assembly and the wire outlet hole in sequence.

[0008] In an embodiment, the inner wall of the barrel is provided with a fixing member, the fixing member is provided with a threaded hole, the pressing plate is provided with a mounting hole, and the mounting barrel further comprises a fastener, the fastener is threadedly connected with the threaded hole after passing through the mounting hole.

[0009] The number of the fixing members is multiple, the multiple fixing members are distributed along the circumferential direction of the inner wall of the barrel, each of the fixing members is provided with a threaded hole, the number of the mounting holes is consistent with and one-to-one corresponds to the number of the threaded holes, and the number of the fasteners is consistent with and one-to-one corresponds to the number of the threaded holes.

[0010] In an embodiment, the support frame comprises a support pipe, a first connecting member and a second connecting member, the first connecting member and the second connecting member are connected with the support pipe, the support pipe is connected with the upper iron core clamp through the first connecting member, the support pipe is connected with the lower iron core clamp through the second connecting member, and the fixing plate is connected with the support pipe.

[0011] In an embodiment, the first connecting member comprises a first connecting plate and a second connecting plate, the first connecting plate is connected with the support pipe, the second connecting plate is welded with the upper iron core clamp, and the first connecting plate is detachably connected with the second connecting plate.

[0012] In an embodiment, the transformer built-in mutual inductor mounting structure further comprises an insulation assembly, and the insulation assembly is located between the mutual inductor assembly and the cavity wall of the accommodating cavity.

[0013] In an embodiment, the transformer built-in mutual inductor mounting structure further comprises a wooden support, the wooden support is connected with the upper iron core clamp and the lower iron core clamp, and the wooden support and the support frame are arranged in the extension direction of the upper iron core clamp.

[0014] In an embodiment, the transformer built-in mutual inductor mounting structure further comprises a plurality of shielding pipes, and the plurality of shielding pipes are arranged in the circumferential direction of the top of the mounting barrel.

[0015] And / or,

[0016] The plurality of shielding pipes are arranged in the circumferential direction of the bottom of the mounting barrel.

[0017] In an embodiment, the transformer built-in mutual inductor mounting structure further comprises a protective corner ring, the protective corner ring is arranged in the inner hole of the mutual inductor assembly, and both ends of the protective corner ring protrude out of the mounting barrel.

[0018] In an embodiment, the number of the installation cylinders is consistent with and one-to-one corresponding to the number of the transformer assemblies, and the three installation cylinders are arranged at intervals along the extension direction of the support frame.

[0019] In the embodiment of the utility model, the transformer built-in transformer installation structure is arranged in the inside of transformer oil tank, the body of transformer oil tank is provided with iron core side column, iron core upper clamp and iron core lower clamp, and the iron core upper clamp and the iron core lower clamp on the body are connected through the support frame, so that stable support structure is provided, and the stability of the transformer assembly in the inside of transformer is ensured;By arranging the transformer assembly in the accommodating cavity of the installation cylinder, the installation process of the transformer assembly can be simplified, maintenance and replacement are facilitated, and work efficiency is improved;And the installation cylinder can provide additional protection for the transformer assembly, prevent external factors from damaging the transformer assembly, also help to prevent accidental movement or vibration of the transformer assembly during operation, thereby improving the safety performance of the transformer, and the quality reliability of the transformer product is improved;The support frame can be installed in the triangular area surrounded by the side wall and the body end of the transformer oil tank, since the side wall on both sides of the transformer oil tank and the body end surround four triangular areas, the support frame can be arbitrarily selected according to actual needs Position for installation, the specific installation position of the support frame is not limited in the embodiment, the support frame is arranged away from the iron core side column, which helps to optimize the utilization of the internal space of the transformer oil tank and improve the space utilization efficiency. In addition, in the embodiment, the specific number of the installation cylinder and the transformer assembly can be adjusted according to the specific design and size of the transformer oil tank, which has good adaptability, the number of the transformer assembly is consistent with and one-to-one corresponding to the number of the lead of the transformer, and the number of the installation cylinder is consistent with and one-to-one corresponding to the number of the transformer assembly, so that each lead can pass through the corresponding transformer assembly, thereby monitoring the running state of the transformer and providing fault protection. The embodiment of the utility model sets the transformer assembly in the accommodating cavity of the installation cylinder, connects the installation cylinder on the support frame, and connects the support frame on the iron core upper clamp and the iron core lower clamp, so as to reasonably utilize the internal space of the transformer oil tank to realize the installation of the built-in transformer, the structure is stable, the actual operation is simple, the quality and efficiency are greatly improved, the quality reliability of the product is also improved, and the number of the installation cylinder and the transformer assembly can be adjusted according to the specific design and size of the transformer oil tank, thereby enhancing the adaptability of the transformer built-in transformer installation structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0021] Figure 1 It is a structure schematic view of an embodiment of the transformer built-in mutual inductor installation structure.

[0022] Figure 2 It is another view structure schematic view of an embodiment of the transformer built-in mutual inductor installation structure.

[0023] Figure 3 It is a structure schematic view of an embodiment of the transformer built-in mutual inductor installation structure.

[0024] Figure 4 It is another view structure schematic view of an embodiment of the transformer built-in mutual inductor installation structure.

[0025] Figure 5 It is a structure schematic view of an embodiment of the installation cylinder of the transformer built-in mutual inductor installation structure.

[0026] Figure 6 It is another structure schematic view of an embodiment of the installation cylinder of the transformer built-in mutual inductor installation structure.

[0027] Explanation of the drawing reference numerals:

[0028] 100, transformer built-in mutual inductor installation structure; 1, support frame; 11, support pipe; 12, first connecting piece; 121, first connecting plate; 122, second connecting plate; 13, second connecting piece; 2, installation cylinder; 21, containing cavity; 22, cylinder body; 23, fixed plate; 24, supporting plate; 241, wire inlet hole; 25, pressing plate; 251, wire outlet hole; 26, fixing piece; 261, threaded hole; 27, fastening piece; 3, mutual inductor assembly; 4, insulation assembly; 41, first insulation piece; 42, second insulation piece; 43, third insulation piece; 5, wooden support; 6, shielding pipe; 7, protection corner ring;

[0029] 200, transformer oil tank; 210, body; 2101, iron core side column; 2102, iron core upper clamping piece; 2103, iron core lower clamping piece; 220, lead wire.

[0030] The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0032] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0033] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0034] In order to ensure the safe and economic operation of the power system, the operation of the power equipment must be monitored and measured, so it is necessary to install a current transformer on the transformer to monitor the operation state of the equipment and provide fault protection. The built-in current transformer is a special current transformer for transformers, which is mainly used for measuring the current signal of the non-star-connected winding of the transformer, such as the current of the medium-voltage winding in a three-phase autotransformer, the current of the middle-angle-connected winding in a three-phase three-winding or double-winding transformer. Unlike the bushing current transformer arranged in the elevated seat, the built-in current transformer is arranged inside the transformer oil tank.

[0035] However, with the increase of product capacity and the improvement of protection system sensitivity requirements, the parameter requirements of the built-in current transformer assembly are increasingly stringent, the size of the transformer assembly is also correspondingly increased, and a certain space is required for fixing and installing. At the same time, the strength of the fixing structure of the transformer assembly needs to be increased. The method of assembling by fixing the insulating wood piece on the clamp used in the early industry has been unable to meet the installation requirements of the transformer assembly.

[0036] The applicant found through careful research that the existing built-in current transformer is mainly installed by means of an insulating wood piece fixed between the upper clamp and the lower clamp of the iron core. Multiple transformers are arranged in the horizontal direction of the insulating wood piece. Due to the increase of the size and mass of the transformer, the space required for installation in the horizontal direction is larger, and the internal space of the transformer oil tank is limited, and the insulating wood piece cannot provide stable support. Therefore, the existing assembly method cannot meet the installation requirements of the transformer.

[0037] The main purpose of the present application is to provide a transformer built-in transformer installation structure to solve the problem of how to meet the installation requirements of the transformer.

[0038] Please refer to Figures 1 to 4 In an embodiment of the present application, the transformer built-in transformer installation structure 100 includes a support frame 1, an installation cylinder 2 and a transformer assembly 3. The support frame 1 is arranged away from the iron core side column 2101. The support frame 1 is used to connect with the upper clamp 2102 and the lower clamp 2103 of the iron core. The installation cylinder 2 is connected with the support frame 1. The installation cylinder 2 is provided with a containing cavity 21. The transformer assembly 3 is arranged in the containing cavity 21.

[0039] In the embodiment of the utility model, transformer built -in mutual inductor installation structure 100 set up in the inside of transformer oil tank 200, the body 210 of transformer oil tank 210 is provided with iron core side column 2101, iron core upper clamp 2102 and iron core lower clamp 2103, is connected through support frame 1 and the iron core upper clamp 2102 and iron core lower clamp 2103 on the body 210, to provide stable support structure, ensure the stability of mutual inductor assembly 3 in the inside of transformer, through setting up mutual inductor assembly 3 in the containing cavity 21 of installation cylinder 2, can simplify the installation process of mutual inductor assembly 3, be convenient for maintenance and replacement, help to improve work efficiency, and installation cylinder 2 can provide additional protection for mutual inductor assembly 3, prevent external factors from causing damage to mutual inductor assembly 3, also help to prevent accidental movement or vibration of mutual inductor assembly 3 in the operation process, thereby improving the safety performance of transformer, make the quality reliability of transformer product improve, support frame 1 can be installed in the triangle area surrounded by the side wall of transformer oil tank 200 and the end of body 210, since the side wall of the two sides of transformer oil tank 200 and the end of body 210 surround four triangle areas, therefore support frame 1 can be arbitrarily selected a position for installation according to actual demand, the specific installation position of support frame 1 is not limited in this embodiment, support frame 1 is set away from iron core side column 2101, help to optimize the utilization of internal space of transformer oil tank 200, improve space utilization efficiency. In addition, in the embodiment, the specific number of installation cylinder 2 and mutual inductor assembly 3 can be adjusted according to the specific design and size of transformer oil tank 200, has good adaptability, the number of mutual inductor assembly 3 is consistent with the number of lead 220 and is set one by one, the number of installation cylinder 2 is consistent with the number of mutual inductor assembly 3 and is set one by one, so that each lead 220 can pass through the corresponding mutual inductor assembly 3, thereby monitoring and fault protection of the operation state of transformer.

[0040] The technical scheme of the utility model sets up mutual inductor assembly 3 in the containing cavity 21 of installation cylinder 2, connects installation cylinder 2 on support frame 1, connects support frame 1 on iron core upper clamp 2102 and iron core lower clamp 2103, thereby rationally utilizes the internal space of transformer oil tank 200 to realize the installation of built-in mutual inductor, stable structure, simple actual operation, quality and efficiency are greatly improved, the quality reliability of product is also improved, and the number of installation cylinder 2 and mutual inductor assembly 3 can be adjusted according to the specific design and size of transformer oil tank 200, enhance the adaptability of transformer built-in mutual inductor installation structure 100.

[0041] Please refer to Figure 5 And Figure 6In an embodiment, the mounting cylinder 2 comprises a cylinder body 22, a fixing plate 23, a supporting plate 24 and a pressing plate 25, the cylinder body 22 and the supporting frame 1 are connected with the fixing plate 23, the bottom of the cylinder body 22 is connected with the supporting plate 24, and the top of the cylinder body 22 is connected with the pressing plate 25, the cylinder body 22, the pressing plate 25 and the supporting plate 24 enclose to form a containing cavity 21, the containing cavity 21 is provided with the transformer component 3, the supporting plate 24 is provided with an inlet hole 241, and the pressing plate 25 is provided with an outlet hole 251, so that the lead wire 220 can pass through the inlet hole 241, the transformer component 3 and the outlet hole 251 in sequence; specifically, the containing cavity 21 formed by the cylinder body 22, the supporting plate 24 and the pressing plate 25 provides a stable installation environment for the transformer component 3, so that the transformer component 3 can be effectively protected, the damage of external factors to the transformer component 3 is reduced, the electromagnetic interference is reduced, the measurement accuracy of the transformer component 3 is improved, the accidental movement or vibration of the transformer component 3 during operation is prevented, and thus the safety performance of the transformer is improved, the quality reliability of the transformer product is improved, the inlet hole 241 provided on the supporting plate 24 and the outlet hole 251 provided on the pressing plate 25 make the lead wire 220 pass through the inlet hole 241, the transformer component 3 and the outlet hole 251 in sequence, so that the equipment operation state is monitored and fault protection is performed.

[0042] In the embodiment, the inner diameter of the inlet hole 241 is greater than the inner diameter of the transformer component 3; specifically, the larger inner diameter of the inlet hole 241 can make the lead wire 220 pass through the transformer component 3 more easily, reduce the difficulty in the installation process, facilitate future maintenance and replacement work, and also ensure the necessary insulation distance to avoid electrical breakdown and ensure the safe operation of the transformer equipment.

[0043] In an embodiment, the inner wall of the barrel 22 is provided with a fixing part 26, the fixing part 26 is provided with a threaded hole 261, the pressing plate 25 is provided with a mounting hole (not shown in the figure), and the mounting barrel 2 further comprises a fastener 27 which is screwed with the threaded hole 261 after passing through the mounting hole; the number of the fixing part 26 is multiple, the multiple fixing parts 26 are distributed along the circumferential direction of the inner wall of the barrel 22, each fixing part 26 is provided with a threaded hole 261, the number of the mounting hole is consistent with and one-to-one corresponds to the number of the threaded hole 261, and the number of the fastener 27 is consistent with and one-to-one corresponds to the number of the threaded hole 261; specifically, the fixing part 26 is arranged on the inner wall of the barrel 22, the top of the fixing part 26 can abut against the bottom of the pressing plate 25, and then the fastener 27 is screwed with the threaded hole 261 of the fixing part 26 after passing through the mounting hole of the pressing plate 25, so as to realize the mounting and fixing of the pressing plate 25 and the barrel 22, realize the limiting of the mutual inductor assembly 3, prevent the mutual inductor assembly 3 from moving out of the containing cavity 21 in the operation process, improve the safety performance of the transformer built-in mutual inductor mounting structure 100, and improve the quality reliability of the transformer product; the multiple fixing parts 26 are distributed along the circumferential direction of the inner wall of the barrel 22, the stability and the carrying capacity of the entire mounting barrel 2 are enhanced, the safety of the entire transformer built-in mutual inductor mounting structure 100 is improved, the one-to-one correspondence between the threaded hole 261 and the mounting hole and the consistency between the number of the fastener 27 and the number of the threaded hole 261 simplify the installation process, improve the installation efficiency, and make the maintenance more convenient.

[0044] In an embodiment, the support frame 1 comprises a support pipe 11, a first connecting part 12 and a second connecting part 13, the first connecting part 12 and the second connecting part 13 are connected with the support pipe 11, the support pipe 11 is connected with the upper core clamp 2102 through the first connecting part 12, the support pipe 11 is connected with the lower core clamp 2103 through the second connecting part 13, and the fixing plate 23 is connected with the support pipe 11; specifically, the support pipe 11 is used to provide the main supporting force, the first connecting part 12 is used to ensure the stable connection between the support pipe 11 and the upper core clamp 2102, and the second connecting part 13 is used to ensure the stable connection between the support pipe 11 and the lower core clamp 2103, by connecting the support pipe 11 with the upper core clamp 2102 and the lower core clamp 2103, the stability of the entire transformer built-in mutual inductor mounting structure 100 can be ensured, and the design of the first connecting part 12 and the second connecting part 13 allows the position of the support pipe 11 to be flexibly adjusted as needed to adapt to different installation requirements, and the design of the support pipe 11 can adapt to transformers of different sizes and shapes, providing good adaptability.

[0045] In the embodiment, the fixing plate 23 is detachably connected with the support tube 11; specifically, the fixing plate 23 can be detachably connected with the support tube 11 through threaded fasteners, which simplifies the installation process, makes the installation and maintenance of the installation cylinder 2 more convenient and fast, and by setting the detachable connection between the fixing plate 23 and the support tube 11, it is more convenient to adjust the number of the installation cylinder 2 and the transformer sensor assembly 3 according to the specific design and size of the transformer oil tank 200, which can effectively improve the adaptability of the transformer built-in transformer installation structure 100.

[0046] According to an embodiment of the present application, the fixing plate 23 is welded with the support tube 11; specifically, welding the fixing plate 23 with the support tube 11 can ensure the stability of the transformer built-in transformer installation structure 100, prevent displacement due to vibration or impact, provide high-strength connection, ensure the reliability of the fixing plate 23 in long-term operation, and reduce maintenance problems.

[0047] In an embodiment, the first connecting piece 12 includes a first connecting plate 121 and a second connecting plate 122, the first connecting plate 121 is connected with the support tube 11, and the second connecting plate 122 is welded with the upper core clamp 2102; the first connecting plate 121 and the second connecting plate 122 are detachably connected; specifically, by setting the first connecting plate 121 and the second connecting plate 122, the smooth connection between the support tube 11 and the upper core clamp 2102 is realized; in the embodiment, the first connecting plate 121 and the support tube 11 can be fixed by bolts, welding or other mechanical methods to ensure the stability of the connection between the support tube 11 and the first connecting plate 121, and the second connecting plate 122 is welded with the upper core clamp 2102 to provide high-strength connection and provide stable support for the installation cylinder 2 and the transformer sensor assembly 3; the first connecting plate 121 and the second connecting plate 122 can be detachably connected by bolts, which is simple in structure and convenient to disassemble and assemble, allowing flexible disassembly and assembly as needed to adjust the position of the support tube 11 to adapt to different installation requirements.

[0048] In addition, in the embodiment, the structure of the second connecting piece 13 can be the same as that of the first connecting piece 12, which helps to reduce manufacturing costs and the complexity of inventory management, and is easier to install and maintain.

[0049] In an embodiment, the transformer built-in mutual inductor installation structure 100 further comprises an insulation assembly 4 located between the mutual inductor assembly 3 and the cavity wall of the accommodating cavity 21; specifically, the insulation assembly 4 is used to ensure the electrical isolation between the mutual inductor assembly 3 and the cavity wall of the accommodating cavity 21, reduce the electromagnetic interference between the mutual inductor assembly 3 and the metal components on the installation cylinder 2, ensure the measurement accuracy of the mutual inductor assembly 3, and prevent current leakage to avoid short circuit or electric shock accidents, which helps to ensure the long-term stable operation of the mutual inductor assembly 3. In this embodiment, the insulation assembly 4 comprises a first insulation piece 41, a second insulation piece 42 and a third insulation piece 43, the first insulation piece 41 is located between the bottom of the mutual inductor assembly 3 and the supporting plate 24, the second insulation piece 42 is located between the top of the mutual inductor assembly 3 and the pressing plate 25, and the third insulation piece 43 is located between the outer wall of the mutual inductor assembly 3 and the inner wall of the cylinder body 22, and one end of the third insulation piece 43 is connected with the first insulation piece 41, and the other end of the third insulation piece 43 is connected with the second insulation piece 42, so as to ensure the electrical isolation between the mutual inductor assembly 3 and the cavity wall of the accommodating cavity 21.

[0050] In an embodiment, the transformer built-in mutual inductor installation structure 100 further comprises a wooden support 5 connected with the upper core clamp 2102 and the lower core clamp 2103, and the wooden support 5 is arranged along the extension direction of the upper core clamp 2102 and spaced apart from the supporting frame 1; specifically, one end of each lead 220 on the transformer is arranged along the wooden support 5, and the other end of the lead 220 is arranged along the wooden support 5 after passing through the corresponding mutual inductor assembly 3, which can simplify the wiring process, make the lead 220 arranged according to the designed direction, make the installation more orderly, and be easier to maintain, and the wooden support 5 is an insulation support, which can prevent current leakage or accidental contact, and improve safety.

[0051] In an embodiment, the transformer built-in mutual inductor installation structure 100 further comprises a shielding tube 6, and the number of the shielding tubes 6 is multiple, and the multiple shielding tubes 6 are arranged along the circumferential direction of the top of the installation cylinder 2 and spaced apart; and / or, the multiple shielding tubes 6 are arranged along the circumferential direction of the bottom of the installation cylinder 2 and spaced apart; specifically, the shielding tube 6 can improve the electromagnetic compatibility of the mutual inductor assembly 3, prevent external electromagnetic interference from affecting the normal work of the mutual inductor assembly 3, and also reduce the electromagnetic interference of the mutual inductor assembly 3 on the surrounding equipment, and the shielding tube 6 is arranged along the circumferential direction of the top and the bottom of the installation cylinder 2, which can provide comprehensive electromagnetic shielding for the mutual inductor assembly 3. In this embodiment, the shielding tube 6 is welded to the outer wall of the top and the bottom of the installation cylinder 2, so that the overall structure forms a good electrode circular arc shape, so as to reduce the electrical insulation distance requirement, thereby reducing the overall installation size of the transformer built-in mutual inductor installation structure 100.

[0052] In an embodiment, the transformer built-in mutual inductor mounting structure 100 further comprises a protective corner ring 7, which is arranged in the inner hole of the mutual inductor assembly 3, and both ends of the protective corner ring 7 extend out of the mounting cylinder 2; specifically, the protective corner ring 7 can provide additional insulation protection to prevent current leakage or accidental contact, thereby improving the insulation reliability of the mutual inductor assembly 3, and in a high-voltage environment, the protective corner ring 7 helps to reduce the electric field concentration, thereby reducing the risk of partial discharge and improving the electrical performance and safety of the mutual inductor assembly 3, and both ends of the protective corner ring 7 extend out of the mounting cylinder 2, which can avoid the lead 220 from contacting the metal components on the mounting cylinder 2, preventing current leakage or accidental contact.

[0053] In an embodiment, the number of mutual inductor assemblies 3 is three, the number of mounting cylinders 2 is consistent with the number of mutual inductor assemblies 3 and is arranged one-to-one, and the three mounting cylinders 2 are arranged at intervals along the extension direction of the support frame 1; specifically, in this embodiment, the transformer built-in mutual inductor mounting structure 100 is applied to a three-phase autotransformer, which has three leads 220, so the number of mutual inductor assemblies 3 is three, and the three mutual inductor assemblies 3 are respectively used to detect the three leads 220, each mutual inductor assembly 3 has a corresponding mounting cylinder 2, ensuring the accuracy of installation and the independence of the mutual inductor assembly 3, and each mutual inductor assembly 3 can be used individually, which is convenient for maintenance and repair without affecting other components; the three mounting cylinders 2 are arranged at intervals along the extension direction of the support frame 1, which effectively reduces the occupied space of the mutual inductor compared with the existing structure in which the mutual inductors are arranged at intervals along the extension direction of the insulating wood piece. In this embodiment, the three mounting cylinders 2 can be arranged at intervals on the same side of the extension direction of the support frame 1, or the three mounting cylinders 2 can be arranged at intervals on the two sides of the extension direction of the support frame 1, and the specific mounting form of the three mounting cylinders 2 is not limited in this embodiment.

[0054] In this embodiment, the mutual inductor assembly 3 comprises at least one mutual inductor, and the number of mutual inductors can be adjusted according to user requirements, and setting multiple mutual inductors can provide multiple measurement points, thereby improving the accuracy and reliability of measurement, and the specific number of mutual inductors is not limited in this embodiment.

[0055] The above description is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A transformer built-in mutual inductor mounting structure characterized by comprising: The transformer built-in mutual inductor mounting structure comprises a support frame, a mounting cylinder and a mutual inductor assembly, the support frame is arranged away from the side column of the iron core, the support frame is used for being connected with the upper clamp of the iron core and the lower clamp of the iron core, the mounting cylinder is connected with the support frame, the mounting cylinder is internally provided with a containing cavity, and the mutual inductor assembly is arranged in the containing cavity; The transformer built-in mutual inductor mounting structure further comprises shielding pipes, the number of the shielding pipes is multiple, and the multiple shielding pipes are arranged along the circumferential direction of the top of the mounting cylinder; And / or, The multiple shielding pipes are arranged along the circumferential direction of the bottom of the mounting cylinder.

2. The transformer built-in mutual inductor installation structure according to claim 1, characterized by The mounting cylinder comprises a cylinder body, a fixed plate, a supporting plate and a pressing plate, the cylinder body and the support frame are connected with the fixed plate, the bottom of the cylinder body is connected with the supporting plate, the top of the cylinder body is connected with the pressing plate, the cylinder body, the pressing plate and the supporting plate enclose to form the containing cavity, the containing cavity is internally provided with the mutual inductor assembly, the supporting plate is provided with a wire inlet hole, and the pressing plate is provided with a wire outlet hole, so that the lead wire can pass through the wire inlet hole, the mutual inductor assembly and the wire outlet hole in sequence.

3. The transformer built-in mutual inductor installation structure according to claim 2, characterized by The inner wall of the cylinder body is provided with a fixing piece, the fixing piece is provided with a threaded hole, the pressing plate is provided with a mounting hole, and the mounting cylinder further comprises a fastener, the fastener is threadedly connected with the threaded hole after passing through the mounting hole; The number of the fixing pieces is multiple, the multiple fixing pieces are distributed along the circumferential direction of the inner wall of the cylinder body, each fixing piece is provided with a threaded hole, the number of the mounting holes is consistent with and one-to-one corresponds to the number of the threaded holes, and the number of the fasteners is consistent with and one-to-one corresponds to the number of the threaded holes.

4. The transformer built-in mutual inductor installation structure according to claim 2, characterized by The support frame comprises a support pipe, a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are connected with the support pipe, the support pipe is connected with the upper clamp of the iron core through the first connecting piece, the support pipe is connected with the lower clamp of the iron core through the second connecting piece, and the fixed plate is connected with the support pipe.

5. The transformer built-in transformer installation structure according to claim 4, characterized by The first connecting piece comprises a first connecting plate and a second connecting plate, the first connecting plate is connected with the support pipe, the second connecting plate is welded with the upper clamp of the iron core, and the first connecting plate is detachably connected with the second connecting plate.

6. The transformer built-in transformer installation structure according to any one of claims 1 to 5, characterized by The transformer built-in mutual inductor mounting structure further comprises an insulation assembly, and the insulation assembly is located between the mutual inductor assembly and the cavity wall of the containing cavity.

7. The transformer built-in transformer installation structure according to any one of claims 1 to 5, characterized by The transformer built-in mutual inductor mounting structure further comprises a wooden support, the wooden support is connected with the upper clamp of the iron core and the lower clamp of the iron core, and the wooden support is arranged along the extension direction of the upper clamp of the iron core and is spaced from the support frame.

8. The transformer built-in transformer installation structure according to any one of claims 1 to 5, characterized by The transformer built-in mutual inductor mounting structure further comprises a protective corner ring, the protective corner ring is arranged in the inner hole of the mutual inductor assembly, and the two ends of the protective corner ring protrude out of the mounting cylinder.

9. The transformer built-in transformer installation structure according to any one of claims 1 to 5, characterized by The number of the mutual inductor assemblies is three, the number of the mounting cylinders is consistent with and one-to-one corresponds to the number of the mutual inductor assemblies, and the three mounting cylinders are arranged along the extension direction of the support frame.

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