Mutual inductor support for solid-sealed polar pole

Abstract

The utility model discloses a mutual inductor support for a solid-sealed polar pole. The mutual inductor support comprises a first mutual inductor, a second mutual inductor and a supporting piece used for supporting and fixing the first mutual inductor and the second mutual inductor. The supporting piece is further provided with a first supporting part, a second supporting part and a third supporting part. And the first supporting part, the second supporting part and the third supporting part are in contact with a supporting surface from at least three point positions, so that the supporting piece stabilizes the first mutual inductor and the second mutual inductor on the supporting surface. Due to the fact that the two mutual inductors can abut against the inner cavity through at least three point positions under the action of the supporting pieces, the phenomenon that displacement occurs between the mutual inductors and the conducting rod when epoxy resin is poured is avoided. Therefore, one-time integral sealing is facilitated, the manufacturing process is simplified, the insulation reliability is improved, the service life is prolonged, the voltage signal sampling accuracy is improved, and the metering precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to a current transformer bracket for solidified pole posts. Background Technology

[0002] An integrated encapsulation process is used to completely encapsulate components such as vacuum interrupters and current / voltage transformers with epoxy resin through vacuum casting, forming a rigid, non-removable whole. However, this process requires all components to be precisely fixed before the resin cures. Any displacement will lead to internal air gaps or uneven insulation layers, affecting dielectric properties. At the same time, if the transformer shifts before the epoxy resin cures, it will change the relative position of the coil and the conductive rod, which will affect the measurement accuracy of the transformer. In particular, the capacitive voltage divider structure of the voltage transformer is sensitive to the inter-electrode distance, and displacement may cause electric field distortion, increasing the risk of partial discharge.

[0003] Specific examples Figure 1 and Figure 2 As shown, after the iron stud 7 is placed in the casting mold 8, in order to ensure that each current transformer can be stably and reliably fitted onto the outside of the conductive rod 9, the support 3 needs to be stably and reliably pressed against the inner wall of the inner cavity 10, so as to avoid displacement between each current transformer and the conductive rod 9 due to the epoxy resin during casting. Utility Model Content

[0004] The purpose of this invention is to provide a current transformer bracket for solidified poles to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a current transformer bracket for sealing poles, comprising a first current transformer and a second current transformer, and a support member for supporting and fixing the first current transformer and the second current transformer; the support member is further provided with a first support portion, a second support portion, and a third support portion; the first support portion, the second support portion, and the third support portion contact the support surface from at least three points, so that the support member stabilizes the first current transformer and the second current transformer on the support surface.

[0006] As a preferred technical solution of this utility model: the support member includes a tray and a first bracket and a second bracket mounted on the tray, and the first bracket, the second bracket and the tray are used to fix the first current transformer and the second current transformer on the support member.

[0007] As a preferred technical solution of this utility model: the first bracket has the same structure as the second bracket, and the first support part, the second support part and the third support part are processed on the first bracket.

[0008] As a preferred technical solution of this utility model: the first support portion protrudes outward along the radial direction of the second bracket and fits against the support surface with an arc surface.

[0009] As a preferred technical solution of this utility model: the second support part and the third support part protrude outward along the radial direction of the second bracket and fit against the support surface with an arc surface.

[0010] As a preferred technical solution of this utility model: the second support part and the third support part protrude outward along the radial direction of the second bracket and abut against the support surface in a point contact manner.

[0011] As a preferred technical solution of this utility model: the tray and the first bracket are made of plastic, and the first bracket is also provided with a wire hole.

[0012] As a preferred technical solution of this utility model, it further includes a diagonal brace, and one end of the diagonal brace passes through the support plate and abuts against the first current transformer.

[0013] As a preferred technical solution of this utility model: the end of the diagonal brace away from the support member is connected to the base plate; the support plate is also provided with a hole for easy insertion of the diagonal brace.

[0014] As a preferred technical solution of this utility model: the inclined brace is a resistor array; wherein, one end of the inclined brace is electrically connected to the first current transformer and the second current transformer, and the base plate is also provided with an aviation socket electrically connected to the inclined brace.

[0015] The beneficial effects of this utility model using the above technical solution are as follows: Since the two current transformers can contact the inner cavity at least three points under the action of the support, each current transformer can be stably and reliably positioned within the inner cavity, thus avoiding displacement between the current transformers and the conductive rods during epoxy resin casting. Because the two current transformers are reliably fixed by the support, no displacement occurs during epoxy resin casting, preventing electric field distortion caused by displacement of the voltage transformer's capacitive voltage divider structure and avoiding the increased risk of partial discharge. Simultaneously, it also ensures the impact resistance, moisture resistance, and mechanical protection capabilities of the epoxy resin after curing. Based on this, the two current transformers will not shift during epoxy resin casting, thus facilitating one-time overall sealing, simplifying the manufacturing process, improving insulation reliability, extending service life, improving voltage signal sampling accuracy, and enhancing metering precision. Attached Figure Description

[0016] Figure 1 A schematic diagram of the main structure of a casting mold in the prior art;

[0017] Figure 2This is a schematic diagram of the cross-sectional structure of a solid-sealed pole after molding in the prior art.

[0018] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 4 An exploded view of the main structure of this utility model;

[0020] Figure 5 A schematic diagram of the main structure of the support component of this utility model;

[0021] Figure 6 This is an exploded structural diagram of the support member and diagonal brace of this utility model.

[0022] In the diagram: 1. First current transformer; 2. Second current transformer; 3. Support component; 30. Tray; 31. First bracket; 32. Second bracket; 33. Wire hole; 34. First support part; 35. Second support part; 36. Third support part; 37. Socket; 4. Diagonal brace; 5. Base plate; 6. Aviation socket; 7. Iron stud; 8. Casting mold; 9. Conductive rod; 10. Inner cavity. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "upper surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model.

[0024] Please see Figure 1-6 This utility model provides an embodiment of a current transformer bracket for a fixed terminal block, comprising a first current transformer 1 and a second current transformer 2, and a support member 3 for supporting and fixing the first current transformer 1 and the second current transformer 2; the support member 3 is further provided with a first support portion 34, a second support portion 35 and a third support portion 36; the first support portion 34, the second support portion 35 and the third support portion 36 contact the support surface from at least three points, so that the support member 3 stabilizes the first current transformer 1 and the second current transformer 2 on the support surface.

[0025] In summary, specifically as follows: Figure 1 and Figure 2As shown, when the first support part 34 on the support member 3 contacts the inner cavity 10 of the casting mold 8, and the second support part 35 and the third support part 36 abut against the side of the inner cavity 10, the support member 3 can be stably positioned in the inner cavity 10. After the support member 3 is stably positioned in the inner cavity 10, the position between the first current transformer 1 and the second current transformer 2 and the conductive rod 9 is reliably fixed, so the entire support member 3 will not be displaced during the epoxy resin casting process.

[0026] Based on this, no displacement will occur when the two current transformers are poured with epoxy resin, which is conducive to achieving one-time overall sealing, simplifying the manufacturing process, improving insulation reliability, extending service life, improving voltage signal sampling accuracy, and improving metering accuracy.

[0027] To improve the overall stability of the support member 3, its structure was optimized. Specifically, the support member 3 includes a support plate 30 and a first bracket 31 and a second bracket 32 ​​mounted on the support plate 30. The first bracket 31, the second bracket 32, and the support plate 30 are used to fix the first current transformer 1 and the second current transformer 2 onto the support member 3. By setting two brackets and using them to fix the corresponding current transformers, and then connecting the support plate 30 to the two brackets, a relatively stable structure is formed between the entire support member 3 and the two current transformers. This prevents displacement of the current transformers on the support member 3 and also prevents displacement of the entire support member 3 due to the contact between the support member 3 and the inner cavity 10. In use, insulating tape can be used to wrap the first current transformer 1 and the second current transformer 2 around the support member 3, and the insulating tape can also be wrapped from the outside of the support member 3 to improve the stability between the support member 3 and the current transformers.

[0028] Furthermore, since the first bracket 31 and the second bracket 32 ​​have the same structure, and the first support part 34, the second support part 35 and the third support part 36 are machined on the first bracket 31, the support parts on the two brackets are in contact with the inner cavity 10, so the stability of the entire support member 3 in the inner cavity 10 can be improved by increasing the number of contact points.

[0029] To balance stability and ensure sufficient epoxy resin deposition around the two current transformers and support member 3, the structures of the first bracket 31 and the second bracket 32 ​​were further optimized, namely:

[0030] The first support portion 34 protrudes outward along the radial direction of the second bracket 32 ​​and fits against the support surface with an arc surface. Therefore, when the circle of the arc surface of the first support portion 34 coincides with the center of the inner cavity 10 on the same straight line, it ensures that the centers of the two current transformers can coincide on the same axis, thereby ensuring the concentricity of the two current transformers and the conductive rod 9; in particular, the first support portion 34 can also prevent the two brackets from blocking the flow of epoxy resin, thereby ensuring that the epoxy resin can fully fill the inner cavity 10.

[0031] Similarly, the second support portion 35 and the third support portion 36 protrude outward along the radial direction of the second bracket 32 ​​and fit against the support surface with arcuate surfaces. Therefore, when the arcuate surfaces of the second support portion 35 and the third support portion 36 come into contact with the inner cavity 10, the second support portion 35 and the third support portion 36 can be used to further support the support member 3 on the side of the support member 3 without affecting the flow of epoxy resin, so as to ensure that the epoxy resin can be fully poured into the inner cavity 10.

[0032] Furthermore, since the second support portion 35 and the third support portion 36 protrude outward along the radial direction of the second bracket 32 ​​and abut against the support surface in a point-contact manner, the resistance to the flow of epoxy resin is reduced while ensuring that the contact point remains unchanged. This allows for an increase in the amount of epoxy resin filling, which in turn helps to improve the sealing performance. At the same time, the epoxy resin can be fully filled into the inner cavity 10, thereby ensuring the mechanical properties of the epoxy resin after curing and its ability to fix the support member 3 after curing.

[0033] In summary, by optimizing the structure of the support member 3, which consists of three parts, the following advantages are achieved: firstly, it facilitates the assembly of the two current transformers with the support member 3; secondly, it facilitates the production and processing of the support member 3; and thirdly, it does not affect the filling of epoxy resin or the mechanical properties of the cured epoxy resin. In particular, by increasing the number of contact points with the inner cavity 10 through the above optimization, the overall stability of the support member 3 within the inner cavity 10 is ensured, thereby guaranteeing the concentricity of the two current transformers and the conductive rod 9 and improving the accuracy of the detection of each current transformer.

[0034] In addition, since the tray 30 and the first bracket 31 are made of plastic, and the first bracket 31 is also provided with a wire hole 33, the lead wires of each current transformer can be inserted through the wire hole 33. At the same time, the lead wires of the current transformer can also be fixed by the support member 3, reducing the impact of the movement of the lead wires on the mechanical properties of the epoxy resin after curing before the epoxy resin is cured.

[0035] Based on the above scheme, in order to further improve the stability of the support member 3 in the inner cavity 10, one end of the diagonal brace 4 passes through the support plate 30 and abuts against the first current transformer 1. Therefore, the diagonal brace 4 is used on one side of the support member 3 to make the support member 3 press tightly against the inner cavity 10.

[0036] Furthermore, since the end of the diagonal brace 4 away from the support member 3 is connected to the base plate 5, the stability of the support member 3 can be further guaranteed by connecting the base plate 5 with the iron stud 7.

[0037] At the same time, the support plate 30 is also provided with a socket 37 for easy insertion of the diagonal brace 4, so that one end of the diagonal brace 4 can pass through the socket 37 and come into contact with the first current transformer 1.

[0038] In particular, since the diagonal brace 4 is a resistor array, with one end electrically connected to the first current transformer 1 and the second current transformer 2, and the base plate 5 is also equipped with an aviation socket 6 electrically connected to the diagonal brace 4, the diagonal brace 4 can not only assist in fixing the support member 3, but also transmit the detection information of the two current transformers to the aviation socket 6, thus facilitating the user to obtain the detection information of the current transformers. That is, the current transformer information is led out by connecting the aviation plug to the aviation socket 6.

[0039] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A current transformer bracket for solidified pole posts, characterized in that: It includes a first current transformer (1) and a second current transformer (2) and a support member (3) for supporting and fixing the first current transformer (1) and the second current transformer (2). The support member (3) is also provided with a first support part (34), a second support part (35) and a third support part (36). The first support (34), the second support (35) and the third support (36) are in contact with the support surface from at least three points so that the support member (3) stabilizes the first transformer (1) and the second transformer (2) on the support surface.

2. The current transformer bracket for a fixed-seal pole as described in claim 1, characterized in that: The support member (3) includes a tray (30) and a first bracket (31) and a second bracket (32) mounted on the tray (30), and the first bracket (31), the second bracket (32) and the tray (30) are used to fix the first transformer (1) and the second transformer (2) on the support member (3).

3. The current transformer bracket for a solidified pole post according to claim 2, characterized in that: The first bracket (31) has the same structure as the second bracket (32), and the first support part (34), the second support part (35) and the third support part (36) are machined on the first bracket (31).

4. The current transformer bracket for a solidified pole as described in claim 3, characterized in that: The first support (34) protrudes outward along the radial direction of the second bracket (32) and fits against the support surface with an arc surface.

5. A current transformer bracket for a fixed-seal pole as described in claim 4, characterized in that: The second support (35) and the third support (36) protrude outward along the radial direction of the second bracket (32) and fit against the support surface with an arc surface.

6. A current transformer bracket for a fixed-seal pole as described in claim 5, characterized in that: The second support (35) and the third support (36) protrude outward along the radial direction of the second bracket (32) and abut against the support surface in a point-contact manner.

7. A current transformer bracket for a fixed-seal pole as described in claim 6, characterized in that: The tray (30) and the first bracket (31) are made of plastic, and the first bracket (31) is also provided with a wire hole (33).

8. A current transformer bracket for a solidified pole as described in any one of claims 2-7, characterized in that: It also includes a diagonal brace (4), one end of which passes through the support plate (30) and abuts against the first current transformer (1).

9. A current transformer bracket for a fixed-seal pole as described in claim 8, characterized in that: The end of the diagonal brace (4) away from the support member (3) is connected to the base plate (5); the support plate (30) is also provided with a hole (37) for easy insertion of the diagonal brace (4).

10. A current transformer bracket for a fixed-seal pole as described in claim 9, characterized in that: The diagonal brace (4) is a resistor array; one end of the diagonal brace (4) is electrically connected to the first current transformer (1) and the second current transformer (2), and the base plate (5) is also provided with an aviation socket (6) electrically connected to the diagonal brace (4).

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