A voltage transformer device that is easy to install with a shielding mesh.

Abstract

This invention relates to the field of voltage transformer technology, specifically to a voltage transformer device that facilitates the installation of a shielding mesh. The device includes a voltage transformer body, inside which an iron core is installed. Two symmetrically distributed insulating baffles are fixedly fitted onto the top of the iron core. Each insulating baffle includes a support ring, and one side of each support ring has an annular groove. A rotating ring is rotatably connected inside the annular groove, and the bottoms of the two rotating rings are driven and abutted against a shielding mesh. In this invention, by inserting both sides of one end of the shielding mesh into horizontal slots and inserting the vertically upward portion of the shielding mesh into a guide groove, rotating the rotating rings in the direction of the shielding mesh, and inserting the drive pins on the rotating rings into the mesh openings of the shielding mesh, the shielding mesh is transported to the middle position above the iron core as the rotating rings rotate, thus improving the efficiency of shielding mesh installation.

Description

Technical Field

[0001] This invention relates to the field of voltage transformer technology, and more specifically to a voltage transformer device that is easy to install with a shielding mesh. Background Technology

[0002] A voltage transformer is a transformer with an iron core. It mainly consists of a primary winding, a secondary winding, an iron core, insulating paper, epoxy resin, and other components and casting materials. The purpose of a voltage transformer is to transform voltage to supply power to measuring instruments and relay protection devices. It is used to measure the voltage, power, and energy of a line, or to protect valuable equipment, motors, and transformers in the event of a line fault. Most existing voltage transformers have a shielding mesh (usually wire mesh or a welded mesh structure of other materials) installed between the winding and the iron core. This shielding mesh replaces the traditional semiconductor enamel coating, eliminating the need for semiconductor enamel treatment. The process improves processing efficiency, and the shielding mesh can improve the field strength distribution and reduce the occurrence of partial discharge. However, when installing the shielding mesh, it is generally necessary to manually insert one end of the shielding mesh into the gap between the winding and the core at the corresponding position, and then bend both ends of the shielding mesh towards the core and lay it. In the above processing, the length of the inserted end of the shielding mesh is often too long or too short, resulting in different lengths of the shielding mesh on both sides of the core, which affects the effect of the shielding mesh in actual use. Sometimes, the lack of auxiliary guiding installation structure for the shielding mesh also makes it difficult to quickly install the shielding mesh onto the core and winding. Summary of the Invention

[0003] To overcome the aforementioned technical problems, the present invention aims to provide a voltage transformer device that facilitates the installation of a shielding mesh. This device involves inserting one end of the shielding mesh into two horizontal slots and inserting the bent portions at both ends of the shielding mesh into corresponding guide slots. Then, the actuating pin on the rotating ring is rotated towards the shielding mesh. The transmission pin on the outer side of the rotating ring is inserted into the mesh opening of the shielding mesh above the horizontal slots. As the rotating ring rotates continuously, the shielding mesh is conveyed to the other end of the iron core. When the limiting block on the rotating ring slides to the bottom of the limiting slot, the limiting block stops inside the limiting slot. At this point, the rotating ring no longer moves the shielding mesh, thus achieving the directional movement of the shielding mesh a certain distance. This ensures that both ends of the shielding mesh are of equal length and are arranged on the iron core, improving the efficiency of shielding mesh installation and preventing the occurrence of different installation lengths at both ends of the shielding mesh.

[0004] By arranging insulating baffles between both ends of winding one and winding two, the two insulating baffles work together to restrict the position of winding one and winding two, preventing them from shifting, and thus improving the capacitance of winding one and winding two. During the movement of the shielding mesh, the guide grooves assist in the directional movement of the two ends of the shielding mesh, and the transverse slots assist in the directional movement of the horizontal end of the shielding mesh. When the shielding mesh is inserted into the middle of the iron core, both guide grooves clamp and restrict the position of the upward bending part of the shielding mesh, making it easy for the two ends of the shielding mesh to be rotated towards the iron core manually.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A voltage transformer device that facilitates the installation of a shielding mesh includes a voltage transformer body. An iron core is installed inside the voltage transformer body. Two symmetrically distributed insulating baffles are sleeved and fixed on the top of the iron core. Each insulating baffle includes a support ring. An annular groove is opened on one side of the support ring. A rotating ring is rotatably connected inside the annular groove. The bottom of the two rotating rings is driven to abut against the shielding mesh.

[0007] The support ring includes a semi-circular ring one and a semi-circular ring two that are fused and welded together. The bottom end of the semi-circular ring two is provided with a guide groove that runs through it. The guide groove is provided with a notch that communicates with the annular groove. The bottom end of the semi-circular ring one is provided with a transverse slot that communicates with the annular groove through the notch.

[0008] The rotating ring includes a semi-circular ring three and a semi-circular ring four that are fused together. A plurality of transmission posts that are movably inserted into the mesh openings of the shielding mesh are uniformly fixed on the outer side wall of one end of the semi-circular ring four.

[0009] Furthermore, the core is located between two insulating baffles and is wrapped with insulating paper one. A winding one is sleeved on the outside of the insulating paper one. An insulating paper two is wrapped with insulating paper two on the outside of the winding one. A winding two is sleeved on the outside of the insulating paper two.

[0010] Furthermore, epoxy resin is filled and cast inside the voltage transformer body and in the gap between the insulating baffle, winding one and winding two. Copper wire is connected and led out on winding two, and one end of the copper wire away from winding two is exposed in the insulator after casting.

[0011] Furthermore, the inner ring of the support ring has two symmetrically opened positioning blind holes, and positioning blocks that are movably inserted into the positioning blind holes are fixed on both sides of the iron core at the corresponding positions of the positioning blind holes.

[0012] Furthermore, the semicircular ring one has a limiting groove inside, the inner ring of the semicircular ring three is fixed with a limiting block that is slidably connected to the limiting groove, both the limiting block and the limiting groove are arc-shaped, and a toggle post is fixed on one side of the semicircular ring three.

[0013] Furthermore, both ends of the shielding mesh are bent upwards and slidably inserted into the corresponding guide grooves, and both sides of the shielding mesh are bent towards the iron core.

[0014] Furthermore, the semicircular ring three and the semicircular ring four are provided with an arc-shaped through hole two that communicates with the arc-shaped through hole one.

[0015] Furthermore, the plurality of transmission columns are arranged at equal angles along the outer ring of the semi-circular ring four, and the distance between two adjacent transmission columns is the same.

[0016] The beneficial effects of this invention are:

[0017] 1. By inserting one end of the shielding mesh into two horizontal slots and inserting the bent parts at both ends of the shielding mesh into the corresponding guide slots, the actuating pin on the rotating ring is rotated towards the shielding mesh. The transmission pin on the outside of the rotating ring is inserted into the mesh of the shielding mesh above the horizontal slots. As the rotating ring rotates continuously, the shielding mesh is transported to the other end of the iron core. When the limiting block on the rotating ring slides to the bottom of the limiting slot, the limiting block stops in the limiting slot. At this time, the rotating ring no longer moves the shielding mesh, thus achieving the directional movement of the shielding mesh a certain distance. That is, the two ends of the shielding mesh are of the same length and are arranged on the iron core, which improves the efficiency of the shielding mesh installation and prevents the phenomenon of different installation lengths at both ends of the shielding mesh.

[0018] 2. By arranging insulating baffles between both ends of winding one and winding two, the two insulating baffles work together to restrict the position of winding one and winding two, preventing them from shifting. This can better improve the capacitance of winding one and winding two. During the movement of the shielding mesh, the guide groove assists in the directional movement of both ends of the shielding mesh, and the transverse slot assists in the directional movement of the horizontal end of the shielding mesh. When the shielding mesh is inserted into the middle of the iron core, both guide grooves clamp and restrict the position of the upward bending part of the shielding mesh, making it easy for the two ends of the shielding mesh to be rotated towards the iron core manually. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the iron core, insulating baffle and shielding mesh structure in this invention;

[0022] Figure 3 This is a schematic diagram of the initial state structure of the shielding mesh installation in this invention;

[0023] Figure 4-5 This is a schematic diagram of the overall structure of the insulating baffle from different perspectives in this invention;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the support ring in this invention;

[0025] Figure 7 This is a schematic diagram of the split three-dimensional structure of the rotating ring in this invention;

[0026] Figure 8 This is a schematic diagram of the external structure of the shielding mesh after installation in this invention.

[0027] In the diagram: 100, Voltage transformer body; 110, Iron core; 111, Insulating paper one; 120, Epoxy resin; 130, Copper wire; 200, Winding one; 210, Insulating paper two; 300, Winding two; 400, Insulating baffle; 410, Support ring; 411, Semicircular ring one; 4111, Limiting groove; 412, Semicircular ring two; 4121, Guide groove; 4122, Notch; 4123, Horizontal slot; 420, Annular groove; 430, Rotating ring; 431, Semicircular ring three; 4311, Limiting block; 4312, Arc-shaped through hole one; 432, Semicircular ring four; 4321, Transmission column; 4322, Arc-shaped through hole two; 440, Positioning blind hole; 500, Shielding mesh. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1-8As shown, a voltage transformer device that facilitates the installation of a shielded mesh includes a voltage transformer body 100. An iron core 110 is installed inside the voltage transformer body 100. Two symmetrically distributed insulating baffles 400 are fixedly sleeved on the top of the iron core 110. Each insulating baffle 400 includes a support ring 410. An annular groove 420 is formed on one side of the support ring 410. A rotating ring 430 is rotatably connected inside the annular groove 420. The bottoms of the two rotating rings 430 are driven to abut against a shielded mesh 500. The support ring 410 includes a semi-circular ring 1 411 and a semi-circular ring 2 412 that are fused together. A guide groove 4121 is formed through the bottom end of the semi-circular ring 2 412. A notch 4122 communicating with the annular groove 420 is formed on the guide groove 4121. A horizontal cross-section communicating with the annular groove 420 through the notch 4122 is formed at the bottom end of the semi-circular ring 1 411. To the slot 4123, the rotating ring 430 includes a semi-circular ring three 431 and a semi-circular ring four 432 that are fused together. Multiple transmission posts 4321, which are movably inserted into the mesh openings of the shielding mesh 500, are uniformly fixed to the outer wall of one end of the semi-circular ring four 432. By inserting both sides of one end of the shielding mesh 500 into the horizontal slot 4123 and inserting the vertically upward area of ​​the shielding mesh 500 into the guide groove 4121, the rotating ring 430 is rotated towards the shielding mesh 500. The transmission posts 4321 on the rotating ring 430 are inserted into the mesh openings of the shielding mesh 500. As the rotating ring 430 rotates with the transmission posts 4321, the shielding mesh 500 is transported to the upper middle position above the iron core 110 and stops. Then, the two ends of the shielding mesh 500 are rotated towards the iron core 110 to complete the installation of the shielding mesh 500, which helps improve the efficiency of the shielding mesh 500 installation.

[0030] See Figure 1 As shown, the core 110 is located between two insulating baffles 400, and insulating paper 111 is wound and fixed thereon. A winding 200 is sleeved on the outside of the insulating paper 111, and insulating paper 210 is wound and fixed on the outside of the winding 200. A winding 300 is sleeved on the outside of the insulating paper 210, thus allowing the windings 200 and 300 to operate in isolation, ensuring the stability of their capacitance. The voltage transformer body 100 is located inside and in an isolated position. The gap between the insulating baffle 400, winding 200 and winding 300 is filled with epoxy resin 120. A copper wire 130 is connected and led out from winding 300. The end of the copper wire 130 away from winding 300 is exposed in the insulator after casting. By arranging insulating baffles 400 between the two ends of winding 200 and winding 300, the two insulating baffles 400 cooperate to restrict the position of winding 200 and winding 300 and prevent winding 200 and winding 300 from shifting.

[0031] See Figure 2-7As shown, the inner ring of the support ring 410 has two symmetrically arranged positioning blind holes 440. Positioning blocks that are movably inserted into the positioning blind holes 440 are fixed on both sides of the iron core 110 at positions corresponding to the positioning blind holes 440, thus achieving initial fixation after the support ring 410 is installed on the iron core 110. A limiting groove 4111 is provided inside the semi-circular ring 1 411. A limiting block 4311 that is slidably connected to the limiting groove 4111 is fixed on the inner ring of the semi-circular ring 3 431. Both the limiting block 4311 and the limiting groove 4111 are arc-shaped. A toggle post is fixed on one side of the semi-circular ring 3 431. The limiting block 4311 slides in the limiting groove 4111, allowing the rotating ring 430 to rotate only a certain angle, facilitating the stopping of the rotating ring 430 after the shielding mesh 500 is transported to the appropriate position. Both ends of the shielding mesh 500 are bent upwards and aligned with the corresponding positions. The guide groove 4121 is slidably inserted, and both sides of the shielding mesh 500 are bent towards the iron core 110. The guide groove 4121 supports the shielding mesh 500 and facilitates the directional delivery of the shielding mesh 500 to the iron core 110. One end of the semi-circular ring three 431 is provided with an arc-shaped through hole one 4312, and the semi-circular ring four 432 is provided with an arc-shaped through hole two 4322 that communicates with the arc-shaped through hole one 4312. The arc-shaped through holes one 4312 and the arc-shaped through hole two 4322 facilitate the rotation of the rotating ring 430 without affecting the horizontal movement of the shielding mesh 500. Multiple transmission columns 4321 are arranged at equal angles along the outer ring of the semi-circular ring four 432, and the distance between two adjacent transmission columns 4321 is the same, so that the transmission columns 4321 correspond to the mesh holes on the shielding mesh 500, and the rotating ring 430 rotates to drive the shielding mesh 500 to move.

[0032] Working principle: During use, when installing this voltage transformer, the semicircular ring 1 411 (with a three-semicircular ring 3 431 internally slidingly connected) and the semicircular ring 2 412 (with a four-semicircular ring 432 internally slidingly connected) are spliced ​​together and fitted onto one end of the iron core 110. The positioning blind hole 440 on the inner ring of the support ring 410, formed by the merging of the semicircular ring 1 411 and the semicircular ring 2 412, is inserted and fixed to the corresponding positioning block on the iron core 110, thus initially restricting the position of the support ring 410 after installation. Simultaneously, the semicircular ring 1 411 and the semicircular ring 2 412 are fused and welded together using external welding equipment, thus completing the semicircular ring 410 connection. The three-ring 431 and the semi-circular ring 432 are similarly fused and welded to form the rotating ring 430. Similarly, another insulating baffle 400 is installed at the other end of the core 110. Then, using an external CNC winding machine, insulating paper 111, winding 200, insulating paper 210, and winding 300 are sequentially wound on the core 110 between the two insulating baffles 400. When it is necessary to install the shielding mesh 500, first insert one end of the shielding mesh 500 into the two transverse slots 4123, and then insert the bent parts at both ends of the shielding mesh 500 into the corresponding guide slots 4121, referring to the instruction manual. Figure 3In the indicated state, the two actuating pins on the rotating rings 430 are then rotated towards the shielding mesh 500. The limiting block 4311 on the inner ring of the rotating ring 430 slides within the limiting groove 4111 of the support ring 410. The rotation of the rotating ring 430 causes multiple transmission pins 4321 on its outer ring to sequentially engage with the shielding mesh 500 above the transverse slot 4123, i.e., the transmission pins 4321 are inserted into the mesh openings of the shielding mesh 500. As the rotating ring 430 rotates, it transports the shielding mesh 500 to the other side of the core 110. When the limiting block 4311 slides to the bottom of the limiting groove 4111, the limiting block 4311 stops sliding, causing the rotating ring 430 to stop moving. Rotation causes the two upward-bent areas on the shielding mesh 500 to move to the middle position of the core 110, fulfilling the installation requirement of placing the shielding mesh 500 in the middle position above the core 110. During this movement, the bent areas at both ends of the shielding mesh 500 slide inside the corresponding guide grooves 4121. As the rotating ring 430 rotates, the arc-shaped through holes 4312 and 4322 on the rotating ring 430 rotate and come into contact with the bent areas at both ends of the shielding mesh 500, thus assisting in the directional movement of the shielding mesh 500. Finally, the two ends of the shielding mesh 500 are rotated towards the core 110 (refer to the instruction manual). Figure 2 This enables the installation of the 500-mesh shielding mesh for the voltage transformer.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A voltage transformer device that facilitates the installation of a shielded mesh, comprising a voltage transformer body (100), wherein an iron core (110) is installed inside the voltage transformer body (100), characterized in that, The top of the core (110) is fitted with two symmetrically distributed insulating baffles (400). Each insulating baffle (400) includes a support ring (410). An annular groove (420) is provided on one side of the support ring (410). A rotating ring (430) is rotatably connected inside the annular groove (420). The bottom of the two rotating rings (430) is in direct contact with a shielding mesh (500). The support ring (410) includes a semi-circular ring one (411) and a semi-circular ring two (412) that are fused together. A guide groove (4121) is provided through the bottom end of the semi-circular ring two (412). A notch (4122) communicating with the annular groove (420) is provided on the guide groove (4121). A transverse slot (4123) communicating with the annular groove (420) through the notch (4122) is provided at the bottom end of the semi-circular ring one (411). The rotating ring (430) includes a semi-circular ring three (431) and a semi-circular ring four (432) that are fused and welded together. A plurality of transmission columns (4321) that are movably inserted into the mesh of the shielding mesh (500) are uniformly fixed on the outer side wall of one end of the semi-circular ring four (432). The semicircular ring one (411) has a limiting groove (4111) inside. The inner ring of the semicircular ring three (431) is fixed with a limiting block (4311) that is slidably connected to the limiting groove (4111). Both the limiting block (4311) and the limiting groove (4111) are arc-shaped. A toggle post is fixed on one side of the semicircular ring three (431).

2. The voltage transformer device for easy installation of a shielded mesh according to claim 1, characterized in that, The core (110) is located between two insulating baffles (400) and is wound with insulating paper one (111). A winding one (200) is sleeved on the outside of the insulating paper one (111). An insulating paper two (210) is wound and fixed on the outside of the winding one (200). A winding two (300) is sleeved on the outside of the insulating paper two (210).

3. A voltage transformer device for easy installation of a shielded mesh according to claim 2, characterized in that, The interior of the voltage transformer body (100) and the gap between the insulating baffle (400), winding one (200) and winding two (300) are filled with epoxy resin (120). A copper wire (130) is connected to the winding two (300), and one end of the copper wire (130) away from the winding two (300) is exposed in the insulator after casting.

4. A voltage transformer device for easy installation of a shielded mesh according to claim 1, characterized in that, The inner ring of the support ring (410) has two symmetrically arranged positioning blind holes (440), and the iron core (110) has positioning blocks fixed on both sides of the corresponding positioning blind holes (440) that are movably inserted into the positioning blind holes (440).

5. A voltage transformer device for easy installation of a shielded mesh according to claim 1, characterized in that, Both ends of the shielding mesh (500) are bent upwards and slidably inserted into the corresponding guide groove (4121). Both sides of the shielding mesh (500) are bent towards the iron core (110).

6. A voltage transformer device for easy installation of a shielded mesh according to claim 1, characterized in that, One end of the semicircular ring three (431) is provided with an arc-shaped through hole one (4312), and the semicircular ring four (432) is provided with an arc-shaped through hole two (4322) that communicates with the arc-shaped through hole one (4312).

7. A voltage transformer device for easy installation of a shielded mesh according to claim 1, characterized in that, Multiple transmission columns (4321) are arranged at equal angles along the outer ring of the semi-circular ring four (432), and the distance between two adjacent transmission columns (4321) is the same.

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