Connecting structure and solid-sealed polar pole

Abstract

The utility model provides a connecting structure and a solid-sealed polar pole, and relates to the technical field of power distribution networks. The connection structure comprises a primary high-voltage loop lead, a plug connector, a secondary element and an insulator. One end of the primary high-voltage loop lead is provided with a shaft hole; one end of the plug connector is inserted into the shaft hole and elastically abuts against the hole wall of the shaft hole; the secondary element is connected with the other end of the plug connector; the insulator wraps the primary high-voltage loop lead, the plug connector and the secondary element. One end of the plug connector is inserted into a shaft hole in the primary high-voltage loop lead, and the other end of the plug connector is connected with the secondary element, so that the primary high-voltage loop lead is connected with the secondary element. When the sizes and the positions of the primary high-voltage loop lead and the secondary element are changed before and after die assembly, the plug connector can slide in the shaft hole to adapt to the position change between the primary high-voltage loop lead and the secondary element, the situation that the position of the assembled secondary element is deformed is improved, and reliable and accurate connection of the secondary element is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution networks, in particular to a connection structure and a sealed pole. Background Art

[0002] In medium- and high-voltage power grid systems, products that deeply integrate primary and secondary circuits are often encapsulated and molded using insulating materials such as epoxy resin or engineering plastics. During assembly, secondary components (such as voltage sensors, current sensors, and temperature sensors) are first connected to the primary high-voltage circuit and placed in a mold. Insulating materials such as epoxy resin and engineering plastics are then poured into the mold. The insulating material is cured through a thermal curing or thermoplastic molding process, and the product is finally formed and demolded.

[0003] During this process, the assembled secondary components and primary high-voltage circuits undergo dimensional and positional changes before and after mold closing. However, existing connections between secondary components and primary high-voltage circuits often utilize threaded or riveted connections, which cannot be adjusted after assembly. This can easily lead to deformation of the connectors after assembly, such as severe skew, which can affect key electrical properties and hinder the reliable and precise connection of the secondary components. Utility Model Content

[0004] In order to solve the problems existing in the prior art, one of the purposes of the present invention is to provide a connection structure.

[0005] The utility model provides the following technical solutions:

[0006] A connection structure comprising:

[0007] A primary high-voltage circuit lead, one end of which is provided with an axial hole;

[0008] A plug-in connector, one end of which is inserted into the shaft hole and elastically abuts against the wall of the shaft hole;

[0009] a secondary component connected to the other end of the connector; and

[0010] An insulator wraps the primary high-voltage circuit lead, the connector and the secondary element.

[0011] As a further optional solution to the connecting structure, the connector includes a shaft body, an elastic sheet and a connecting portion, the shaft body is inserted into the shaft hole, the elastic sheet is arranged on the side wall of the shaft body, and the shaft body is elastically supported against the hole wall of the shaft hole through the elastic sheet, and the connecting portion is respectively connected to the shaft body and the secondary element.

[0012] As a further optional solution to the connection structure, both ends of the elastic sheet are respectively connected to the shaft body, and the middle portion of the elastic sheet is arched.

[0013] As a further optional solution to the connection structure, the connector further includes two mounting portions, which are sleeved on the shaft and distributed along the axis of the shaft;

[0014] A plurality of elastic sheets are provided, and the plurality of elastic sheets are distributed along the circumference of the shaft body. Both ends of the elastic sheet are connected to the shaft body through the two mounting portions respectively.

[0015] As a further optional solution to the connection structure, a notch is provided on the mounting portion, and the notch extends along the axial direction of the shaft body.

[0016] As a further optional solution to the connection structure, a guide ball head is provided at one end of the shaft away from the connection portion.

[0017] As a further optional solution to the connection structure, the connection structure further includes a coil spring, which is sleeved on one end of the primary high-voltage circuit lead close to the connector and the connector, and the insulator wraps the coil spring.

[0018] As a further optional solution to the connection structure, the pitch of the coil spring is d, the wire diameter of the coil spring is D, and 1.5D≤d≤2D.

[0019] As a further optional solution to the connection structure, the secondary element is a voltage sensor, a current sensor or a temperature sensor.

[0020] Another object of the present invention is to provide a sealed pole.

[0021] The utility model provides the following technical solutions:

[0022] A sealed pole comprises the above-mentioned connection structure.

[0023] The embodiments of the present utility model have the following beneficial effects:

[0024] In the above-mentioned connection structure, one end of the connector is inserted into the axial hole on the primary high-voltage circuit lead, and the other end is connected to the secondary component, thereby connecting the primary high-voltage circuit lead and the secondary component together. Since the connector elastically abuts against the hole wall of the axial hole, the connector is not easily dislodged from the axial hole under the action of static friction, ensuring that the primary high-voltage circuit lead and the secondary component maintain a stable connection before the insulator is cast. During the process of casting the insulator, the primary high-voltage circuit lead, the connector, and the secondary component are placed in the casting mold together. When the size and position of the primary high-voltage circuit lead and the secondary component change before and after the mold is closed, the connector can slide in the axial hole to adapt to the position change between the primary high-voltage circuit lead and the secondary component, improve the deformation of the position of the secondary component after assembly, and facilitate reliable and precise connection of the secondary component.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 The figure shows an overall structural diagram of a connection structure provided by an embodiment of the present utility model;

[0028] Figure 2 A cross-sectional schematic diagram of a coil spring in a connection structure provided by an embodiment of the present utility model is shown;

[0029] Figure 3 A cross-sectional schematic diagram of a connector in a connection structure provided by an embodiment of the present utility model is shown;

[0030] Figure 4 The figure shows the overall structure of a connector in a connection structure provided by an embodiment of the present utility model.

[0031] Description of main component symbols:

[0032] 100-primary high-voltage circuit lead; 110-axis hole; 200-connector; 210-axis body; 211-guide ball head; 220-elastic sheet; 230-connecting part; 240-mounting part; 241-notch; 300-secondary element; 400-insulator; 500-coil spring. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0035] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the template description herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] In the related art, threaded connection or riveting is often used between the secondary component and the primary high-voltage circuit.

[0039] However, for products like primary and secondary fused sealed poles and insulators used in medium and high voltage applications, besides ensuring effective connection, they also need to consider the high-voltage electric field, thus requiring the removal of sharp corners. Furthermore, medium and high voltage products operate in ambient temperatures ranging from -40°C to 70°C. Because the insulation components are often made of epoxy resin and engineering plastics, sharp corners in metal components can affect product stress and thermal expansion differences, potentially leading to cracking.

[0040] Primary and secondary fusion products are encapsulated and molded using insulating materials such as epoxy resin and engineering plastics, and require mold assembly. The components are assembled and placed in the mold, and then insulating materials such as epoxy resin and engineering plastics are poured into the mold. After the product solidifies through a thermosetting or thermoplastic molding process, it is removed from the mold. Because it needs to be placed in the mold in advance and then the mold is closed and pressure maintained, the assembled components need to undergo dimensional changes before and after closing the mold. Therefore, the connection between secondary components such as sensors and the primary high-voltage circuit requires connectors that can be resized to facilitate reliable and accurate connection of the secondary components.

[0041] When using a threaded connection, because the starting position of the thread is uncertain, the secondary component often lacks directionality after connection and may be at any angle within 360°. Threaded connections generally require more than four threads to have a certain strength, so they must be rotated more than four times during installation, which greatly affects the efficiency of installation. At the same time, threaded connections are difficult to adjust in height. The primary and secondary fusions generally require a position adjustment distance of 2mm, and the adjustment of the thread relies on the fixation of the end face, which can only have one size. Therefore, it is difficult to complete the thread adjustment during the assembly process of the primary and secondary fusion components. In addition, the secondary components and the primary high-voltage circuit connected by threads must be assembled in advance and preheated before being installed in the mold. This makes it impossible for the primary high-voltage circuit and the secondary components to be processed according to their respective needs, which brings a lot of trouble to product production.

[0042] On the other hand, when using the riveted sleeve method for connection, the rivet sleeve needs to be clamped with the primary and secondary fused wires to connect, and all riveted joints will have sharp corners after clamping, which will lead to the risk of discharge in medium and high voltage environments. Similarly, if sharp corners appear in important positions, there will be risks such as cracking when using epoxy and engineering plastic materials for insulation. In addition, the use of riveted sleeves also faces the problem of non-adjustable size after size selection, and the position of the connector after assembly will be deformed. If there is severe skew, it will affect key characteristics such as electrical properties. Finally, the connectors are connected by manual riveting, which will lead to unreliable riveting due to factors such as the operator's state, operating methods, and operating habits. Unreliable riveting often results in false connections, leading to connection failure.

[0043] Example

[0044] For the above questions, please refer to Figure 1 This embodiment provides a connection structure, including a primary high-voltage circuit lead 100, a connector 200, a secondary component 300 and an insulator 400.

[0045] One end of the primary high-voltage circuit lead 100 is provided with an axial hole 110 . Accordingly, one end of the connector 200 is inserted into the axial hole 110 and elastically abuts against the hole wall of the axial hole 110 . The secondary component 300 is connected to the other end of the connector 200 .

[0046] In addition, the insulator 400 wraps the primary high-voltage circuit lead 100 , the connector 200 , and the secondary element 300 .

[0047] In the above connection structure, one end of the connector 200 is inserted into the axial hole 110 of the primary high-voltage circuit lead 100, and the other end is connected to the secondary component 300, thereby connecting the primary high-voltage circuit lead 100 and the secondary component 300 together. Because the connector 200 elastically abuts against the wall of the axial hole 110, the connector 200 is unlikely to be dislodged from the axial hole 110 due to static friction, ensuring a stable connection between the primary high-voltage circuit lead 100 and the secondary component 300 before the insulator 400 is cast. During the casting process of the insulator 400, the primary high-voltage circuit lead 100, the connector 200, and the secondary component 300 are all placed into the casting mold. When the primary high-voltage circuit lead 100 and the secondary component 300 change in size and position before and after mold closing, the connector 200 can slide in the axial hole 110 to adapt to the position change between the primary high-voltage circuit lead 100 and the secondary component 300, improve the deformation of the position of the secondary component 300 after assembly, and facilitate reliable and precise connection of the secondary component 300.

[0048] Exemplarily, the diameter of the shaft hole 110 is 2-8 mm.

[0049] Furthermore, the connection structure further includes a coil spring 500. The coil spring 500 is sleeved on one end of the primary high-voltage circuit lead 100 close to the connector 200 and the connector 200, and the insulator 400 wraps the coil spring 500.

[0050] During use, the coil spring 500 completely covers the primary high-voltage circuit lead 100 and the connector 200, effectively shielding the sharp corners at the connection between the primary high-voltage circuit lead 100 and the connector 200. Furthermore, the coil spring 500 has a copper wire angled structure, with openings in all directions to allow the insulator 400 to flow in before curing, effectively joining the coil spring 500, the primary high-voltage circuit lead 100, the connector 200, and the insulator 400.

[0051] In addition, the coil spring 500 can also enhance the ability of the insulator 400 to resist environmental stress and reduce the impact of environmental changes on the insulator 400.

[0052] Optionally, the coil spring 500 is made of conductive or semiconductor materials (such as copper, aluminum, nylon, etc.) to achieve a shielding effect on the electric field.

[0053] See also Figure 2 In some embodiments, the pitch of the coil spring 500 is d, and the wire diameter of the coil spring 500 is D, satisfying 1.5D≤d≤2D.

[0054] Optionally, the ratio d / D of the pitch to the wire diameter of the coil spring 500 may be 1.5, 1.6, 1.7, 1.8, 1.9, 2, or any value between 1.5 and 2.

[0055] Please also refer to Figure 3 and Figure 4 Specifically, the connector 200 includes a shaft 210 , an elastic sheet 220 and a connecting portion 230 .

[0056] The shaft 210 is inserted into the shaft hole 110, and the elastic piece 220 is provided on the side wall of the shaft 210. The shaft 210 elastically abuts against the wall of the shaft hole 110 via the elastic piece 220. In addition, the connecting portion 230 is connected to the shaft 210 and the secondary element 300 respectively.

[0057] During assembly, the shaft body 210 and the elastic piece 220 provided on the side wall of the shaft body 210 are inserted into the shaft hole 110 on the primary high-voltage circuit lead 100. During this process, the elastic piece 220 is squeezed and deformed, and elastically abuts against the hole wall of the shaft hole 110.

[0058] Exemplarily, a surface of the connection portion 230 is provided with threads, and the connection portion 230 is threadedly connected to the secondary element 300 .

[0059] In some embodiments, both ends of the elastic piece 220 are respectively connected to the shaft body 210 , and the middle portion of the elastic piece 220 is arched.

[0060] When the connector 200 is not inserted into the shaft hole 110, the middle of the elastic piece 220 is arched. When the shaft body 210 and the elastic piece 220 are inserted into the shaft hole 110 together, the elastic piece 220 is squeezed and deformed by the hole edge of the shaft hole 110, and the middle of the elastic piece 220 moves toward the shaft body 210.

[0061] Furthermore, the plug connector 200 further includes two mounting portions 240 . The two mounting portions 240 are sleeved on the shaft body 210 and distributed along the axis direction of the shaft body 210 .

[0062] In addition, a plurality of elastic sheets 220 are provided, and the plurality of elastic sheets 220 are distributed along the circumference of the shaft body 210. One end of each elastic sheet 220 is connected to the shaft body 210 through one of the mounting portions 240, and the other end of each elastic sheet 220 is connected to the shaft body 210 through another mounting portion 240.

[0063] It is understandable that the two mounting portions 240 and each elastic piece 220 can be processed and formed first, and then mounted on the shaft body 210 .

[0064] Furthermore, a notch 241 is provided on the mounting portion 240 , and the notch 241 extends along the axis direction of the shaft body 210 .

[0065] When the elastic sheet 220 is squeezed and deformed, the outer diameter of the mounting portion 240 changes accordingly, and the mounting portions 240 located on both sides of the notch 241 move relatively, while the entire mounting portion 240 always maintains close contact with the shaft body 210.

[0066] Furthermore, a guide ball head 211 is provided at one end of the shaft body 210 away from the connecting portion 230 .

[0067] During the assembly process, the guide ball head 211 can guide the shaft body 210 , which is beneficial for the shaft body 210 to be smoothly inserted into the shaft hole 110 .

[0068] In some embodiments, the secondary element 300 is a voltage sensor, a current sensor, or a temperature sensor.

[0069] In summary, in the above connection structure, one end of connector 200 is inserted into axial hole 110 in primary high-voltage circuit lead 100, and the other end is connected to secondary component 300, thereby connecting primary high-voltage circuit lead 100 and secondary component 300. Because connector 200 elastically abuts against the wall of axial hole 110, static friction prevents connector 200 from being removed from axial hole 110, ensuring a stable connection between primary high-voltage circuit lead 100 and secondary component 300 before the insulator 400 is cast and molded.

[0070] During the casting process of the insulator 400, the primary high-voltage circuit lead 100, connector 200, and secondary component 300 are placed together in the casting mold. If the primary high-voltage circuit lead 100 and secondary component 300 experience size or positional changes before and after the mold is closed, the connector 200 can slide within the axial hole 110, with an effective movement distance of at least 15 mm, to accommodate the positional changes between the primary high-voltage circuit lead 100 and secondary component 300. This prevents deformation of the secondary component 300 after assembly and facilitates a reliable and precise connection of the secondary component 300.

[0071] In addition, the use of the connector 200 can achieve a quick connection between the primary high-voltage circuit lead 100 and the secondary component 300, which is simple and convenient to assemble, so that the primary high-voltage circuit lead 100 and the secondary component 300 can be placed and preheated separately before being placed in the mold, without the need for pre-assembly and preheating.

[0072] This embodiment also provides a sealed pole, including the above-mentioned connection structure.

[0073] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0074] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0075] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A connection structure, characterized in that: include: A primary high-voltage circuit lead, one end of which is provided with an axial hole; A plug-in connector, one end of which is inserted into the shaft hole and elastically abuts against the wall of the shaft hole; a secondary component connected to the other end of the connector; and An insulator wraps the primary high-voltage circuit lead, the connector and the secondary element.

2. The connection structure according to claim 1, characterized in that: The connector includes a shaft body, an elastic sheet and a connecting portion. The shaft body is inserted into the shaft hole. The elastic sheet is arranged on the side wall of the shaft body. The shaft body is elastically supported by the hole wall of the shaft hole through the elastic sheet. The connecting portion is respectively connected to the shaft body and the secondary element.

3. The connection structure according to claim 2, characterized in that: Both ends of the elastic piece are connected to the shaft body respectively, and the middle part of the elastic piece is arranged in an arch shape.

4. The connection structure according to claim 3, characterized in that: The plug connector further includes two mounting portions, which are sleeved on the shaft and distributed along the axis of the shaft; A plurality of elastic sheets are provided, and the plurality of elastic sheets are distributed along the circumference of the shaft body. Both ends of the elastic sheet are connected to the shaft body through the two mounting portions respectively.

5. The connection structure according to claim 4, characterized in that: The mounting portion is provided with a notch, and the notch extends along the axial direction of the shaft body.

6. The connection structure according to claim 2, characterized in that: A guide ball head is provided at one end of the shaft body away from the connecting portion.

7. The connection structure according to any one of claims 1 to 6, characterized in that: The connection structure further includes a coil spring, which is sleeved on one end of the primary high-voltage circuit lead close to the connector and the connector, and the insulator wraps the coil spring.

8. The connection structure according to claim 7, characterized in that: The pitch of the coil spring is d, the wire diameter of the coil spring is D, and 1.5D≤d≤2D.

9. The connection structure according to any one of claims 1 to 6, characterized in that: The secondary element is a voltage sensor, a current sensor or a temperature sensor.

10. A sealed pole, characterized in that: The invention comprises the connection structure according to any one of claims 1 to 9.

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