Adjustable binding post for three-phase dry-type transformer

Abstract

The utility model provides an adjustable binding post for a three-phase dry-type transformer, which belongs to the technical field of dry-type transformers and comprises a connecting part, a post body, a sealing plate fixedly connected to the side wall of the post body, a base plate fixedly connected to the interior of the post body and a cable clamping joint hermetically mounted on the side wall of the end part of the post body. And the wiring part comprises a supporting plate fixedly connected to the side wall of the base plate, a connecting piece fixedly connected to the side wall of the supporting plate, and a wire end protection cover inserted in the middle of the connecting piece. The beneficial effects of the utility model are that: can adapt to the thickness difference of different specifications of cable joints, realize the dual function of light load contact and pressure adjustability, ensure that the cables with different wire diameters can be firmly crimped, avoid the cable damage caused by excessive crimping, be compatible with a variety of joint types, isolate the live part from the external metal, and improve the production efficiency. And the insulation performance and the operation safety of the binding post in complex environments such as moisture and dust can be obviously improved.

Description

Technical Field

[0001] This utility model belongs to the field of dry-type transformer technology, specifically relating to an adjustable terminal block for a three-phase dry-type transformer. Background Technology

[0002] With the development of intelligent and efficient power systems, three-phase dry-type transformers are increasingly widely used in industrial and civil fields. As a core component of power transmission, its terminals must simultaneously meet the requirements of high-reliability electrical connection, convenient maintenance and commissioning, and stability in complex environments.

[0003] Traditional terminal blocks are mostly fixed structures lacking adjustability. Cable connectors are tightened with a single bolt, which cannot accommodate the clamping requirements of different cable specifications. Poor contact can easily lead to localized overheating or even arcing. In open-air or humid environments, the inside of the terminal block is susceptible to moisture and dust intrusion, resulting in decreased insulation performance and increasing the risk of short circuits. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable terminal block for a three-phase dry-type transformer, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An adjustable terminal block for a three-phase dry-type transformer, comprising:

[0007] The connecting component includes a column, a sealing plate fixedly connected to the side wall of the column, a pad fixedly connected to the interior of the column, and a cable clamping connector sealed and installed on the end side wall of the column, the end of the cable clamping connector extending into the interior of the column.

[0008] The wiring component includes a support plate fixedly connected to the side wall of the pad, a connector fixedly connected to the side wall of the support plate, a wire end protection cover inserted into the middle of the connector, and a terminal block fixedly connected to the side wall of the pad, the end of the terminal block extending to the side wall of the cable clamping connector.

[0009] As a preferred embodiment of the present invention, the wiring component further includes a pressure plate inserted into the side wall of the wire end protective cover, a positioning post inserted into the inner side of the middle groove of the pressure plate, and the end of the positioning post being threadedly connected to the side wall of the support plate.

[0010] In a preferred embodiment of this utility model, a spring is sleeved in the middle of the positioning post, one end of the spring is in elastic contact with the side of the pressure plate, and the other end of the spring is in elastic contact with the upper surface of the support plate.

[0011] In a preferred embodiment of this utility model, the end of the positioning post is threaded with a nut, and the nut is engaged with the upper end of the pressure plate.

[0012] As a preferred embodiment of this utility model, the wiring component further includes a limiting post threadedly connected to the side wall of the support plate, and an adjusting block threadedly connected to the end of the limiting post. The adjusting block is engaged in the middle of the groove at the end of the pressure plate, and the end of the limiting post is at the same height as the wiring hole on the side wall of the wire end protective cover.

[0013] As a preferred embodiment of the present invention, the connecting component further includes a sensor connecting cover installed on the side wall of the column, and a plug sealed on the side wall of the column, the end of the sensor connecting cover extending into the interior of the column.

[0014] As a preferred embodiment of this utility model, a sealing ring is installed at the connection between the column and the sealing plate, and the side wall of the sealing plate is tightly fitted to the side wall of the column.

[0015] Compared with the prior art, the beneficial effects of this utility model are: it can adapt to the thickness difference of different specifications of cable connectors, realize the dual functions of light-load contact and adjustable pressure, and ensure that cables of different diameters can be firmly crimped; the stroke limiting mechanism composed of the limiting post and the adjusting block can accurately limit the movement distance of the crimping plate, avoid excessive crimping and damage to the cable, and is compatible with multiple connector types, reducing repeated disassembly and assembly losses, isolating live parts from external metal, and significantly improving the insulation performance and operational safety of the terminal block in complex environments such as humidity and dust. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a front structural diagram of the present invention;

[0019] Figure 3 This is one of the internal structural diagrams of this utility model;

[0020] Figure 4 This is the second schematic diagram of the internal structure of this utility model.

[0021] In the diagram: 100, connecting component; 101, column; 102, sealing plate; 103, pad; 104, cable clamp connector; 105, sensor connection cover; 106, plug; 200, wiring component; 201, support plate; 202, connector; 203, wire end protection cover; 204, terminal block; 205, wire clamping plate; 206, positioning post; 207, spring; 208, nut; 209, limit post; 210, adjusting block. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0025] Example

[0026] Reference Figure 1-4 This embodiment of the present invention provides an adjustable terminal block for a three-phase dry-type transformer, comprising:

[0027] The connecting component 100 includes a column 101, a sealing plate 102 fixedly connected to the side wall of the column 101, a pad 103 fixedly connected to the inside of the column 101, and a cable clamping connector 104 sealed and installed on the end side wall of the column 101, the end of the cable clamping connector 104 extending into the inside of the column 101.

[0028] The wiring component 200 includes a support plate 201 fixedly connected to the side wall of the pad 103, a connector 202 fixedly connected to the side wall of the support plate 201, a wire end protection cover 203 inserted into the middle of the connector 202, and a terminal block 204 fixedly connected to the side wall of the pad 103, with the end of the terminal block 204 extending to the side wall of the cable clamping connector 104.

[0029] The column 101 is a hollow cylinder made of high-strength insulating material (such as epoxy resin), forming a cable mounting cavity inside. Threaded interfaces on the outer wall are used to fix the sealing plate 102 and sensor connection cover 105. The insulation performance of the column 101 ensures electrical isolation safety of the terminal block under high-voltage environments. The sealing plate 102 is a circular metal plate that is sealed to the end of the column 101 via a sealing ring, forming a dustproof and moisture-proof enclosed space. A wire-passing hole is provided in the center of the sealing plate 102, and bolt holes are provided on the edges to fix it to the column 101, ensuring that the internal cables are protected from external environmental corrosion. The pad 103 is fixed to the insulating support plate in the middle section inside the column 101, supporting the wiring component 200 and providing a mechanical fixing point. A cable channel is pre-cut on the pad 103 to guide the cable clamping connector 104 to mate with the terminal block 204. The cable clamping connector 104 is used to connect external cables, and mechanical clamping of the cables is achieved by rotating the clamping nut. The support plate 201 is used to install components such as the pressure plate 205. The connector 202, terminal block 204, and wire end protector 203 work together to facilitate the fixing of cables and the formation of an electrical connection path. The wire end protector 203 is a cover made of transparent insulating plastic, with a hollow interior to accommodate cable connectors.

[0030] Specifically, the wiring component 200 also includes a pressure plate 205 inserted into the side wall of the wire end protection cover 203. A positioning post 206 is inserted into the inner side of the middle groove of the pressure plate 205. The end of the positioning post 206 is threaded to the side wall of the support plate 201. A spring 207 is sleeved in the middle of the positioning post 206. One end of the spring 207 is in elastic contact with the side of the pressure plate 205, and the other end of the spring 207 is in elastic contact with the upper surface of the support plate 201. A nut 208 is threaded to the end of the positioning post 206. The nut 208 is snapped into the upper end of the pressure plate 205. The wiring component 200 also includes a limiting post 209 threaded to the side wall of the support plate 201, and an adjusting block 210 threaded to the end of the limiting post 209. The adjusting block 210 is snapped into the middle of the groove at the end of the pressure plate 205, and the end of the limiting post 209 is at the same height as the wiring hole on the side wall of the wire end protection cover 203.

[0031] The pressure plate 205 is a metal pressure plate with a groove in the middle that slides into the positioning post 206. It can move up and down along the positioning post 206 by rotating the nut 208. The positioning post 206 is made of stainless steel, with one end threaded to the support plate 201 and the other end elastically connected to the pressure plate 205 via a spring 207, forming an adjustable elastic clamping structure. The spring 207 is fitted into the middle of the positioning post 206, initially providing upward elastic force so that the pressure plate 205 lightly presses against the cable connector. Rotating the nut 208 compresses the spring 207, increasing the pressure of the pressure plate 205 on the cable and ensuring the reliability of the electrical connection. The limiting post 209 is threadedly connected to the support plate 201, and the adjusting block 210 (wedge-shaped metal block) is installed at the end. By rotating the limiting post 209, the position of the adjusting block 210 in the groove of the pressure plate 205 can be adjusted, thereby limiting the maximum travel of the pressure plate 205 and preventing excessive compression that could damage the cable.

[0032] It should be noted that the connecting component 100 also includes a sensor connecting cover 105 installed on the side wall of the column 101, and a plug 106 sealed on the side wall of the column 101, with the end of the sensor connecting cover 105 extending into the interior of the column 101.

[0033] Among them, the sensor connection cover 105 and the plug 106 are optional accessories. The sensor connection cover 105 is used to install temperature or humidity sensors to realize real-time monitoring of the terminal block's operating status. The plug 106 is a spare interface seal made of rubber to ensure the sealing of unused interfaces.

[0034] Preferably, a sealing ring is installed at the connection between the column 101 and the sealing plate 102, and the side wall of the sealing plate 102 is tightly fitted to the side wall of the column 101.

[0035] In use, after stripping the insulation layer of the outer cable, insert it into the cable clamping connector 104, tighten the clamping nut on the outside of the connector, and fix the cable conductor with the elastic clip. Insert the other end of the cable connector into the wire end protection cover 203, push the wire clamping plate 205 downward, so that the connector contacts the connector 202. At this time, the spring 207 provides initial pressure, and rotating the nut 208 further compresses the spring, and the wire clamping plate 205 firmly presses the connector onto the connector 202, forming an electrical conduction path. Adjust the limit post 209 so that the adjusting block 210 abuts against the groove of the wire clamping plate 205 to set the maximum crimping stroke and avoid damage to the cable or connector due to excessive force.

[0036] In summary, the elastic combination of the pressure plate, spring, and positioning post allows for adaptation to thickness differences in cable connectors of varying specifications, achieving both light-load contact and adjustable pressure. Rotating the nut increases the crimping force via the spring, ensuring a secure connection for cables of different diameters. The travel limiting mechanism, consisting of the limiting post and adjusting block, precisely restricts the pressure plate's movement, preventing over-crimping and cable damage, while also accommodating various connector types and reducing repeated disassembly and assembly losses. The post and sealing plate form a dustproof and waterproof seal through a sealing ring, which, combined with the threaded seal of the sensor connection cover and plug, effectively prevents moisture and dust intrusion. The insulating pad and epoxy resin post create a double insulation barrier, isolating live components from external metal, significantly improving the insulation performance and operational safety of the terminal block in complex environments such as humidity and dust.

[0037] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0038] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0039] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An adjustable terminal block for a three-phase dry-type transformer, characterized in that: include, The connecting component (100) includes a column (101), a sealing plate (102) fixedly connected to the side wall of the column (101), a pad (103) fixedly connected to the inside of the column (101), and a cable clamping connector (104) sealed and installed on the end side wall of the column (101), the end of the cable clamping connector (104) extending into the inside of the column (101); The wiring component (200) includes a support plate (201) fixedly connected to the side wall of the pad (103), a connector (202) fixedly connected to the side wall of the support plate (201), a wire end protection cover (203) inserted into the middle of the connector (202), and a terminal block (204) fixedly connected to the side wall of the pad (103), the end of the terminal block (204) extending to the side wall of the cable clamping connector (104).

2. The adjustable three-phase dry-type transformer terminal block according to claim 1, characterized in that: The wiring component (200) also includes a pressure plate (205) inserted into the side wall of the wire end protection cover (203). A positioning post (206) is inserted into the inner side of the middle groove of the pressure plate (205), and the end of the positioning post (206) is threaded to the side wall of the support plate (201).

3. The adjustable three-phase dry-type transformer terminal block according to claim 2, characterized in that: A spring (207) is sleeved in the middle of the positioning post (206). One end of the spring (207) is in elastic contact with the side of the pressure plate (205), and the other end of the spring (207) is in elastic contact with the upper surface of the support plate (201).

4. The adjustable three-phase dry-type transformer terminal block according to claim 3, characterized in that: The end of the positioning post (206) is threaded with a nut (208), which is snapped onto the upper end of the pressure plate (205).

5. The adjustable three-phase dry-type transformer terminal block according to claim 4, characterized in that: The wiring component (200) further includes a limiting post (209) threadedly connected to the side wall of the support plate (201), and an adjusting block (210) threadedly connected to the end of the limiting post (209). The adjusting block (210) is engaged in the middle of the groove at the end of the pressure plate (205), and the end of the limiting post (209) is level with the wiring hole on the side wall of the wire end protection cover (203).

6. The adjustable three-phase dry-type transformer terminal block according to claim 5, characterized in that: The connecting component (100) also includes a sensor connection cover (105) installed on the side wall of the column (101) and a plug (106) sealed on the side wall of the column (101), the end of the sensor connection cover (105) extending into the interior of the column (101).

7. The adjustable three-phase dry-type transformer terminal block according to claim 6, characterized in that: A sealing ring is installed at the connection between the column (101) and the sealing plate (102), and the side wall of the sealing plate (102) is in close contact with the side wall of the column (101).

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