A three-element combined voltage transformer body structure

Abstract

The present application relates to mutual inductor technical field, propose a kind of three-element combination voltage mutual inductor body structure, comprising: core, three-column rectangular structure;Coil assembly, winding on the three columns of core;Wiring assembly, symmetrically arranged in the top two sides of coil assembly;Positioning assembly, clamped on the three columns of core, transverse positioning is carried out to coil assembly;Supporting assembly, inserted in the three columns of core, longitudinal positioning is carried out to coil assembly and wiring assembly;In the present application, except that the insulation skeleton is used as insulating medium between primary coil and secondary coil, its periphery is only positioned by positioning assembly and supporting assembly with relatively compact body, so that the volume of product is smaller, solve the problem of narrow insulation space of three-element combination voltage mutual inductor in prior art, inconvenient installation.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to a three-element combined voltage transformer body structure. Background Technology

[0002] Three-phase three-element combined instrument transformers are a type of distribution network instrument transformer, widely used in power systems. They include two structural forms: independent rectangular core structure and three-column rectangular core structure. Compared with the independent rectangular core structure, the three-phase three-element combined instrument transformer with the three-column rectangular core structure has advantages such as compact structure, small size, and low cost.

[0003] Currently, the primary and secondary coils of three-element combined voltage transformers require insulation media and other large auxiliary structures for support and positioning, resulting in a large product size. This leads to a narrow insulation space and makes the installation of three-element combined voltage transformers inconvenient. Summary of the Invention

[0004] This invention proposes a three-element combined voltage transformer body structure, which solves the problem of narrow insulation space and inconvenient installation in the prior art for three-element combined voltage transformers.

[0005] The technical solution of the present invention is as follows: A three-element combined voltage transformer body structure, comprising: The iron core has a three-column rectangular structure; The coil assembly is wound around the three columns of the iron core; Wiring assemblies are symmetrically arranged on both sides of the top of the coil assembly; The positioning component is clamped on the three columns of the iron core to perform lateral positioning of the coil assembly; The support components, inserted into the three columns of the iron core, provide longitudinal positioning for the coil assembly and wiring assembly.

[0006] Preferably, the three columns of the iron core are symmetrically provided with axial stepped holes, the axial stepped holes including a first hole section in the upper part, a second hole section in the middle part, and a third hole section in the lower part.

[0007] Preferably, the coil assembly includes a secondary coil, a coil frame sleeved on the outside of the secondary coil, and a primary coil wound on the outside of the coil frame.

[0008] Preferably, the wiring assembly includes a primary bracket, the top of the primary coil is provided with a terminal and a primary lead is connected to the terminal, one end of the primary bracket is fixed to the terminal and the other end of the primary bracket is provided with a bayonet.

[0009] Preferably, the positioning component includes an upper positioning plate and a lower positioning plate. Both the upper and lower positioning plates are provided with protrusions that are engaged with the three columns of the iron core. The upper positioning plate has symmetrically provided limiting grooves on both sides of its top to limit the position of the primary bracket. The upper positioning plate has symmetrically provided buckles on both sides of its bottom. The protrusions on both sides of the lower positioning plate have buckle grooves that engage with the buckles.

[0010] Preferably, the support assembly includes an upper insulating rod and a lower insulating rod that is connected and cooperates with the upper insulating rod.

[0011] Preferably, the upper insulating rod includes an upper rod body, a fixing plate is fixed to the top of the upper rod body, an upper cylinder and an upper cone located below the upper cylinder are fixed to the outer side of the bottom of the upper rod body, and a threaded hole is opened on the inner side of the end of the upper rod body.

[0012] Preferably, the lower insulating rod includes a lower rod body, the top of the lower rod body is fixed with a threaded rod that is threadedly connected to a threaded hole, the outer side of the lower end of the lower rod body is fixed with a lower cone and a lower cylinder located below the lower cone, and the bottom of the lower cylinder is fixed with a knob.

[0013] The beneficial effects of this invention are as follows: 1. In this invention, the relative pressing and cooperation of the support components can cause the positioning components on both sides to press the coil component towards the middle, so that the position of the coil component can be automatically centered. 2. In this invention, when the ends of the upper rod and the lower rod abut against each other, the upper cone and the lower cone just abut against the bottom wall of the first hole section and the third hole section, and at the same time the upper cylinder and the upper cone just abut against the outer side of the protrusion of the upper positioning plate and the lower positioning plate. The coil assembly is laterally positioned by the positioning components on both sides, and the coil assembly is longitudinally positioned by the support components on both sides. 3. In this invention, the limiting grooves on both sides of the top of the upper positioning plate are used to position the primary bracket laterally, and the support assembly is used to position the primary bracket longitudinally, to prevent the primary bracket and the wiring terminals from becoming loose, and to further improve the connection stability. 4. In this invention, apart from the insulating frame serving as the insulating medium, the primary and secondary coils are positioned only by relatively compact positioning and support components, resulting in a smaller product size and solving the problem of narrow insulation space and inconvenient installation in existing three-element combined voltage transformers. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the body structure of a three-element combined voltage transformer proposed in this invention; Figure 2This is a front view schematic diagram of the body structure of a three-element combined voltage transformer proposed in this invention; Figure 3 This is a side view schematic diagram of the body structure of a three-element combined voltage transformer proposed in this invention; Figure 4 This is a top view schematic diagram of the structure of a three-element combined voltage transformer proposed in this invention; Figure 5 This is an exploded view of the structure of a three-element combined voltage transformer proposed in this invention. Figure 6 This is a schematic diagram of a partial cross-sectional structure of the iron core proposed in this invention; Figure 7 This is a schematic diagram of the coil assembly and wiring assembly structure proposed in this invention; Figure 8 This is an exploded view of the positioning component proposed in this invention; Figure 9 This is a schematic diagram of the exploded structure of the support component proposed in this invention; Figure 10 This is a structural schematic diagram of the support component proposed in this invention from another perspective. In the diagram: 1. Iron core; 11. Axial stepped hole; 111. First hole section; 112. Second hole section; 113. Third hole section; 2. Coil assembly; 21. Secondary coil; 22. Coil frame; 23. Primary coil; 3. Wiring assembly; 31. Primary bracket; 311. Bayonet; 32. Terminal; 33. Primary lead wire; 4. Positioning assembly; 41. Upper positioning plate; 411. Limiting groove; 412. Buckle; 42. Lower positioning plate; 43. Protrusion; 431. Buckle groove; 5. Support assembly; 51. Upper insulating rod; 511. Upper rod body; 512. Fixing plate; 513. Upper cylinder; 514. Upper cone; 515. Threaded hole; 52. Lower insulating rod; 521. Lower rod body; 522. Threaded rod; 523. Lower cone; 524. Lower cylinder; 525. Knob. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The present invention provides a technical solution: a three-element combined voltage transformer body structure, including an iron core 1, a coil assembly 2, a wiring assembly 3, a positioning assembly 4, and a support assembly 5.

[0018] Please see Figure 5 and Figure 6 The iron core 1 is a three-column rectangular structure. Axial stepped holes 11 are symmetrically opened on the three columns of the iron core 1. The axial stepped holes 11 are used to insert the support assembly 5. The axial stepped holes 11 include a first hole section 111 in the upper part, a second hole section 112 in the middle part, and a third hole section 113 in the lower part. The diameters of the first hole section 111 and the third hole section 113 are both larger than the diameter of the second hole section 112. That is, the two ends of the axial stepped hole 11 are thicker and the middle is thinner, which facilitates the insertion and positioning of the support assembly 5.

[0019] Please see Figure 5 and Figure 7 The coil assembly 2 is wound on the three columns of the iron core 1. The coil assembly 2 includes a secondary coil 21, a coil frame 22 sleeved on the outside of the secondary coil 21, and a primary coil 23 wound on the outside of the coil frame 22. The primary coil 23 and the secondary coil 21 are insulated and isolated only by the coil frame 22 made of epoxy resin.

[0020] Please see Figure 5 and Figure 7 The wiring assembly 3 is symmetrically arranged on both sides of the top of the coil assembly 2. The wiring assembly 3 includes a primary bracket 31. The top of the primary coil 23 is provided with a terminal 32, and a primary lead 33 is connected to the terminal 32. One end of the primary bracket 31 is fixed to the terminal 32. The primary coil 23, the terminal 32, and the primary bracket 31 are fixed by welding. The other end of the primary bracket 31 is provided with a bayonet 311, which facilitates longitudinal positioning by the support assembly 5 and prevents the primary bracket 31 and the terminal 32 from becoming loose, thus affecting the connection stability.

[0021] Please see Figure 5 and Figure 8 The positioning component 4 is clamped on the three columns of the iron core 1 to perform lateral positioning of the coil assembly 2. The positioning component 4 includes an upper positioning plate 41 and a lower positioning plate 42. Both the upper positioning plate 41 and the lower positioning plate 42 are provided with protrusions 43 that are locked onto the three columns of the iron core 1. The upper positioning plate 41 has symmetrically opened limiting grooves 411 on both sides of its top to limit the position of the primary bracket 31. The lower positioning plate 42 has symmetrically fixed buckles 412 on both sides of its bottom. The protrusions 43 on both sides of the lower positioning plate 42 have buckle grooves 431 that engage with the buckles 412. The upper positioning plate 41 and the lower positioning plate 42 perform lateral positioning of the coil assembly 2, and the limiting grooves 411 on both sides of the top of the upper positioning plate 41 perform lateral positioning of the primary bracket 31 to prevent the primary bracket 31 and the terminal 32 from becoming loose, thereby further improving the connection stability.

[0022] Please see Figure 5 , Figure 9 and Figure 10 The support assembly 5 is inserted into the three columns of the iron core 1 to provide longitudinal positioning for the coil assembly 2 and the wiring assembly 3. The support assembly 5 includes an upper insulating rod 51 and a lower insulating rod 52 that mates with the upper insulating rod 51. The upper insulating rod 51 includes an upper rod body 511, a fixing plate 512 fixed to the top of the upper rod body 511, an upper cylinder 513 fixed to the outer bottom of the upper rod body 511, and an upper cone 514 located below the upper cylinder 513. A threaded hole 515 is opened on the inner side of the end of the upper rod body 511, wherein the upper cylinder 513 and the upper rod body 511 are connected. The outer diameter of 1 is equal to the diameter of the first hole section 111 and the second hole section 112 of the axial stepped hole 11. The lower insulating rod 52 includes a lower rod body 521. The top of the lower rod body 521 is fixed with a threaded rod 522 that is threadedly connected to the threaded hole 515. The outer side of the end of the lower rod body 521 is fixed with a lower cone 523 and a lower cylinder 524 located below the lower cone 523. The bottom of the lower cylinder 524 is fixed with a knob 525. The outer diameter of the lower cylinder 524 and the lower rod body 521 is equal to the diameter of the third hole section 113 and the second hole section 112 of the axial stepped hole 11.

[0023] The working principle and usage process of this invention are as follows: During installation, the protrusions 43 on the upper positioning plate 41 and the lower positioning plate 42 are first respectively locked onto the three columns of the iron core 1. After pressing the upper positioning plate 41 and the lower positioning plate 42, the upper positioning plate 41 and the lower positioning plate 42 are fixed by the engagement of the buckle 412 and the buckle groove 431. Then, the upper rod body 511 of the upper insulating rod 51 is inserted from top to bottom into the second hole section 112 through the first hole section 111. Then, the lower rod body 521 of the lower insulating rod 52 is inserted from bottom to top into the second hole section 112 through the upper cylinder 513. Under the guidance of the second hole section 112, the threaded rod 522 at the top of the lower rod body 521 is inserted into the threaded hole 515 at the end of the upper rod body 511. The knob 525 at the bottom of the lower cylinder 524 is turned so that the upper rod body 511... 11 and the lower rod 521 approach each other, and then the upper cone 514 and the lower cone 523 press the protrusions 43 of the upper positioning plate 41 and the lower positioning plate 42 from the upper and lower parts respectively. The support components 5 on both sides can make the positioning components 4 on both sides press the coil assembly 2 relative to each other, so that the position of the coil assembly 2 can be automatically centered. When the ends of the upper rod 511 and the lower rod 521 abut against each other, the upper cone 514 and the lower cone 523 just abut against the bottom wall of the first hole section 111 and the third hole section 113. At the same time, the upper cylinder 513 and the upper cone 514 also just abut against the outer side of the protrusions 43 of the upper positioning plate 41 and the lower positioning plate 42. The positioning components 4 on both sides perform lateral positioning of the coil assembly 2, and the support components 5 on both sides perform longitudinal positioning of the coil assembly 2. Finally, the primary bracket 31's latch 311 is secured to the outside of the upper rod 511, and the top surface of the primary bracket 31 contacts the bottom surface of the fixing plate 512. The primary bracket 31 itself is secured in the limiting groove 411 of the upper positioning plate 41. Then, the other end of the primary bracket 31 is welded to the wiring terminal 32 of the coil assembly 2. The limiting grooves 411 on both sides of the top of the upper positioning plate 41 provide lateral positioning for the primary bracket 31, and the support assembly 5 provides longitudinal positioning for the primary bracket 31, preventing the primary bracket 31 and the wiring terminal 32 from becoming loose, and further improving the connection stability.

[0024] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A three-element combined voltage transformer body structure, characterized in that, include: The iron core (1) is a three-column rectangular structure; The coil assembly (2) is wound on the three columns of the iron core (1); Wiring components (3) are symmetrically arranged on both sides of the top of coil components (2); The positioning component (4) is clamped on the three columns of the iron core (1) to perform lateral positioning of the coil assembly (2); The support assembly (5) is inserted into the three columns of the iron core (1) to provide longitudinal positioning for the coil assembly (2) and the wiring assembly (3). The iron core (1) has symmetrically provided axial stepped holes (11) on its three columns. The axial stepped holes (11) include a first hole section (111) in the upper part, a second hole section (112) in the middle part, and a third hole section (113) in the lower part. The coil assembly (2) includes a secondary coil (21), a coil frame (22) sleeved on the outside of the secondary coil (21), and a primary coil (23) wound on the outside of the coil frame (22). The wiring assembly (3) includes a primary bracket (31), the top of the primary coil (23) is provided with a terminal (32), and a primary lead (33) is connected to the terminal (32). One end of the primary bracket (31) is fixed to the terminal (32), and the other end of the primary bracket (31) is provided with a bayonet (311). The positioning component (4) includes an upper positioning plate (41) and a lower positioning plate (42). Both the upper positioning plate (41) and the lower positioning plate (42) are provided with protrusions (43) that are locked onto the three columns of the iron core (1). The upper positioning plate (41) has symmetrically provided limiting grooves (411) on both sides of the top to limit the primary bracket (31). The upper positioning plate (41) has symmetrically fixed buckles (412) on both sides of the bottom. The protrusions (43) on both sides of the lower positioning plate (42) are provided with buckle grooves (431) that engage with the buckles (412). The support assembly (5) includes an upper insulating rod (51) and a lower insulating rod (52) that is connected to the upper insulating rod (51).

2. The structure of a three-element combined voltage transformer according to claim 1, characterized in that, The upper insulating rod (51) includes an upper rod body (511), a fixing plate (512) is fixed to the top of the upper rod body (511), an upper cylinder (513) and an upper cone (514) located below the upper cylinder (513) are fixed to the outer side of the bottom of the upper rod body (511), and a threaded hole (515) is opened on the inner side of the end of the upper rod body (511).

3. The structure of a three-element combined voltage transformer according to claim 2, characterized in that, The lower insulating rod (52) includes a lower rod body (521), the top of the lower rod body (521) is fixed with a threaded rod (522) that is threadedly connected to a threaded hole (515), the outer side of the end of the lower rod body (521) is fixed with a lower cone (523) and a lower cylinder (524) located below the lower cone (523), and a knob (525) is fixed at the bottom of the lower cylinder (524).

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