A joint for preventing miswiring of three-phase three-wire

Abstract

The application discloses a joint for preventing three-phase three-wire miswiring, which comprises a socket assembly, a plug assembly and a connecting rod. The socket assembly comprises a socket body, a connecting column arranged on the socket body, three plug holes arranged on the connecting column and conductive sheets arranged in the plug holes. The plug assembly comprises a plug, three conductive rods arranged on the plug and extending from one end of the plug. The conductive rods are connected with the plug holes. The application can avoid short circuit, insulation breakdown, motor reverse rotation, equipment burning and other serious losses caused by phase sequence error of a system, effectively avoid polarity misconnection, and is convenient and safe to use.

Description

Technical Field

[0001] This invention relates to the field of connectors, and in particular to a connector for preventing miswiring of three-phase three-wire connections. Background Technology

[0002] Since high-voltage systems of 10kV and above generally use a three-phase, three-wire power supply, most high-voltage systems use three-phase, two-element energy meters to measure electrical energy. There is an internationally accepted convention for the phase arrangement of the bushings on the primary and secondary sides of a three-phase transformer, with no exceptions. This means that when construction workers face the high-voltage side of the transformer, if there are only three bushings on the high-voltage side, they are arranged from left to right as "A, B, C". If the bushing arrangement of a typical power transformer does not conform to this rule, it is considered an incorrect connection, and the transformer manufacturer's quality control department will not allow it to leave the factory. Operators often mistakenly connect wires to the wrong positions, failing to insert them into the corresponding mounting holes, which can easily lead to incorrect polarity connections, causing short circuits and other dangerous situations. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract and title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0005] Therefore, the technical problem that this invention aims to solve is that operators often connect wires to the wrong positions when wiring, failing to insert them into the corresponding mounting holes, which can easily lead to short circuits due to incorrect polarity connection and other dangerous situations.

[0006] To solve the above technical problems, the present invention provides the following technical solution: a connector for preventing miswiring of three-phase three-wire, comprising a socket assembly, including a socket body, wherein the socket body is provided with a connecting post, the connecting post is provided with three socket holes, and a conductive sheet is provided in the socket hole;

[0007] A plug assembly includes a plug having three conductive rods extending from one end of the plug; the conductive rods are engaged with and connected to a socket.

[0008] As a preferred embodiment of the connector for preventing miswiring of three-phase three-wire according to the present invention, wherein: the plug outer sleeve is provided with a connecting ring, the inner side of the connecting ring is provided with an annular boss, the outer side of the plug is provided with an annular groove, and the annular boss is embedded in the annular groove.

[0009] As a preferred embodiment of the connector for preventing miswiring of three-phase three-wire according to the present invention, wherein: the end of the connecting post is provided with a frustum, the inner side of the connecting ring is provided with a first spiral groove, and the length of the first spiral groove along the axial direction of the connecting ring is consistent with the axial length of the connecting post.

[0010] As a preferred embodiment of the connector for preventing miswiring of three-phase three-wire according to the present invention, wherein: a positioning ring is provided outside the connecting ring, a limiting step is provided at the end of the plug away from the connecting ring, an axially extending long groove is provided on the part of the plug located between the limiting step and the annular groove, a limiting pin is provided on the inner side of the positioning ring, and the limiting pin is embedded in the long groove.

[0011] As a preferred embodiment of the connector for preventing miswiring of three-phase three-wire according to the present invention, a first spring is provided between the positioning ring and the limiting step.

[0012] As a preferred embodiment of the connector for preventing miswiring of three-phase three-wire according to the present invention, wherein: a positioning pin is provided on the inner side of the end of the positioning ring that contacts the connecting ring, a second spiral groove is provided on the outer side of the connecting ring, and the positioning pin is embedded in the second spiral groove;

[0013] The second spiral groove has the same number of turns as the first spiral groove.

[0014] As a preferred embodiment of the connector for preventing miswiring of three-phase three-wire according to the present invention, wherein: the axial length of the second spiral groove is consistent with the length of the long groove, and when the limiting pin is located at the end of the long groove, the positioning pin is simultaneously located at the end of the second spiral groove.

[0015] As a preferred embodiment of the connector for preventing miswiring of three-phase three-wire according to the present invention, wherein: a limiting hole is provided at the end of the connecting ring away from the plug, a limiting groove is provided in the limiting hole, a moving block is provided in the limiting groove, the moving block is provided with a positioning shaft, the positioning shaft passes through the limiting hole; a second spring is provided between the moving block and the limiting hole;

[0016] The socket body has a fixing hole corresponding to the limiting hole at the end near the plug.

[0017] As a preferred embodiment of the connector for preventing miswiring of three-phase three-wire according to the present invention, wherein: the socket body is provided with a reset groove that penetrates the fixing hole, the reset groove extends axially, a reset pin is provided in the fixing hole, the reset pin is provided with a toggle rod that passes through the reset groove, and a third spring is provided between the toggle rod and the end of the reset groove near the plug.

[0018] As a preferred embodiment of the connector for preventing miswiring of three-phase three-wire according to the present invention, wherein: the positions of the three sockets correspond to the positions of the three conductive rods, and the conductive sheet and conductive rod are respectively connected to their respective wires.

[0019] The beneficial effects of this invention are: the single-phase determination of this invention avoids serious losses such as short circuits, insulation breakdowns, motor reversals, and equipment burnout caused by incorrect phase sequence in the primary system, effectively avoids incorrect polarity connection, and is convenient and safe to use. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 A schematic diagram of the structure of a connector for preventing miswiring of three-phase three-wires according to an embodiment of the present invention is provided;

[0022] Figure 2 A schematic diagram of the connecting ring in a connector for preventing miswiring of three-phase three-wires according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of a connector for preventing miswiring of three-phase three-wires according to an embodiment of the present invention before connection;

[0024] Figure 4 This is a schematic diagram of the completed connection structure of the connector for preventing miswiring of three-phase three-wire according to an embodiment of the present invention. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0028] Furthermore, 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 throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0029] Example 1

[0030] Reference Figure 1 This embodiment provides a connector to prevent miswiring of three-phase three-wire connections, including a socket assembly 100 and a plug assembly 200. Both the socket assembly 100 and the plug assembly 200 are three-phase connectors. The socket assembly 100 includes a socket body 101, which is cylindrical. A connecting post 101a is provided on the socket body 101, with a diameter smaller than the diameter of the socket body 101. Three socket holes 101b are provided on the connecting post 101a, and conductive plates 102 are disposed within each socket hole 101b. The three socket holes 101b correspond to the connectors of three wires. The plug assembly 200 includes a plug 201, which is cylindrical. The plug 201 is provided with three conductive rods 202, which extend from one end of the plug 201. The conductive rods 202 are engaged with the socket holes 101b. The positions of the three conductive rods 202 and the three socket holes 101b are fixed, and only one connection method is required.

[0031] Furthermore, the plug 201 is fitted with a connecting ring 203, with an annular boss 203a on the inner side of the connecting ring 203 and an annular groove 201a on the outer side of the plug 201, the annular boss 203a being embedded in the annular groove 201a. Therefore, the connecting ring 203 and the plug 201 can rotate relative to each other; and in the initial state, that is, before connection, the position of the connecting ring 203 remains unchanged, thus serving as an identification function.

[0032] When connecting, simply align the three conductive rods 202 and the three sockets 101b.

[0033] Example 2

[0034] Reference Figures 1-4 This is the second embodiment of the present invention, which is based on the previous embodiment and differs from the previous embodiment in that:

[0035] The connecting post 101a has a frustum 101c at its end. The position of the frustum 101c is fixed. In this embodiment, there are two frustums 101c. The inner side of the connecting ring 203 has a first spiral groove 203b. There are also two first spiral grooves 203b. It should be noted that before connection, when the position of the frustum 101c is aligned with the end position of the first spiral groove 203b, the three conductive rods 202 and the three sockets 101b are exactly in the correct position.

[0036] It should be noted that the length of the first spiral groove 203b along the axial direction of the connecting ring 203 is consistent with the axial length of the connecting post 101a, that is, when the connection is completed, the end of the connecting ring 203 is exactly in contact with the end face of the socket body 101.

[0037] Furthermore, a positioning ring 204 is provided outside the connecting ring 203, and a limiting step 201b is provided at the end of the plug 201 away from the connecting ring 203. A long groove 201c extending axially is provided in the portion of the plug 201 located between the limiting step 201b and the annular groove 201a. A limiting pin 204a is provided inside the positioning ring 204, and the limiting pin 204a is embedded in the long groove 201c. Therefore, under the action of the limiting pin 204a, the positioning ring 204 can only move along the extension direction of the long groove 201c. A first spring 205 is provided between the positioning ring 204 and the limiting step 201b. The first spring 205 is a compression spring, meaning that in the initial state, the positioning ring 204 is located away from the limiting step 201b. A positioning pin 204b is provided inside the end of the positioning ring 204 that contacts the connecting ring 203, and a second spiral groove 203c is provided outside the connecting ring 203, with the positioning pin 204b embedded in the second spiral groove 203c.

[0038] Reference Figure 3 In the initial state, the positioning ring 204 is located away from the limiting step 201b, and the positioning pin 204b is located at the end of the second spiral groove 203c. Therefore, before connection, due to the force of the spring, the position of the connecting ring 203 relative to the three conductive rods 202 is constant, and the position of the opening of the first spiral groove 203b near the end of the frustum 101c relative to the conductive rods 202 is unchanged. When the opening of the end of the first spiral groove 203b is directly opposite the frustum 101c, it is also the position where the three conductive rods 202 and the three sockets 101b are correctly connected, thus avoiding misconnection.

[0039] It should be noted that the number of turns of the second spiral groove 203c is the same as that of the first spiral groove 203b. In this embodiment, the number of turns of the second spiral groove 203c and the first spiral groove 203b is 0.25 turns. When the opening at the end of the first spiral groove 203b is aligned with the frustum 101c, the three conductive rods 202 and the three sockets 101b are in the correct position, so the plug assembly 200 can be pushed to connect them. During the connection process, under the action of the frustum 101c, the connecting ring 203 performs a spiral motion and drives the positioning ring 204 to compress the first spring 205. When the conductive rod 202 is fully embedded in the socket 101b, the frustum 101c is exactly located at the end of the first spiral groove 203b, and the end of the connecting ring 203 is in contact with the end of the socket body 101. The positioning pin 204b is also at the end of the second spiral groove 203c, and the distance between the positioning ring 204 and the connecting ring 203 is at its maximum.

[0040] Therefore, the axial length of the second spiral groove 203c is the same as the length of the long groove 201c. When the limiting pin 204a is located at the end of the long groove 201c, the positioning pin 204b is simultaneously located at the end of the second spiral groove 203c.

[0041] Furthermore, a limiting hole 203d is provided at the end of the connecting ring 203 away from the plug 201, a limiting groove 203e is provided in the limiting hole 203d, a moving block 206 is provided in the limiting groove 203e, and a positioning shaft 206a is provided in the moving block 206, which passes through the limiting hole 203d; a second spring 207 is provided between the moving block 206 and the limiting hole 203d; and a fixing hole 101d corresponding to the limiting hole 203d is provided at the end of the socket body 101 near the plug 201. Therefore, during the spiral motion of the connecting ring 203, the positioning shaft 206a first contacts the socket body 101 and retracts into the limiting hole 203d during the spiral motion of the connecting ring 203 until the conductive rod 202 is fully embedded in the socket 101b. At this time, the limiting hole 203d is coaxial with the fixing hole 101d, and the positioning shaft 206a is ejected into the fixing hole 101d under the action of the spring, which restricts the rotation of the connecting ring 203, thereby restricting the spiral motion of the connecting ring 203, that is, restricting the disengagement of the plug 201.

[0042] Preferably, the socket body 101 is provided with a reset groove 101e that penetrates the fixing hole 101d. The reset groove 101e extends axially, and a reset pin 103 is provided in the fixing hole 101d. The reset pin 103 is provided with a toggle lever 103a that passes through the reset groove 101e. A third spring 104 is provided between the toggle lever 103a and the end of the reset groove 101e near the plug 201. Therefore, when it is necessary to separate the connector, the toggle lever 103a is pushed towards the plug 201 to drive the reset pin 103 to push the positioning shaft 206a, causing the limiting shaft to retract into the limiting hole 203d. At this time, under the action of the first spring, the linear motion of the positioning ring 204 is converted into the rotational motion of the connecting ring 203, and the rotation direction is opposite to the direction during connection, that is, it can automatically disengage.

[0043] It should be noted that the three sockets 101b correspond to the positions of the three conductive rods 202, and the conductive sheet 102 and the conductive rod 202 are respectively connected to their respective wires. That is, the conductive sheet 102 is connected to the three-phase wire on one side, and the conductive rod 202 is connected to the three-phase wire on the other side.

[0044] In this embodiment, before the socket assembly 100 and the plug assembly 200 are connected, under the action of the first spring 205, the positions of the first spiral groove 203b and the frustum 101c are fixed, thus determining a unique connection method and avoiding misconnection of the three-phase wires. At this time, the connection can be completed by aligning the positions. Moreover, when the connection is completed, under the action of the positioning shaft 206a, the connection between the two is not easy to fall off. When separation is required, it is only necessary to move the toggle lever 103a.

[0045] 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 proportions 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 the invention. 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 structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0046] 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 currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0047] 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.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention 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 solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A connector for preventing miswiring of three-phase three-wire connections, characterized in that: include, The socket assembly (100) includes a socket body (101), on which a connecting post (101a) is provided, and three socket holes (101b) are provided on the connecting post (101a), and a conductive sheet (102) is provided in the socket hole (101b). The plug assembly (200) includes a plug (201) having three conductive rods (202) extending from one end of the plug (201); the conductive rods (202) are engaged with a socket (101b). The plug (201) is fitted with a connecting ring (203), the end of the connecting post (101a) is provided with a frustum (101c), and the inner side of the connecting ring (203) is provided with a first spiral groove (203b). The length of the first spiral groove (203b) along the axial direction of the connecting ring (203) is the same as the axial length of the connecting post (101a). A positioning ring (204) is provided outside the connecting ring (203). A limiting step (201b) is provided at one end of the plug (201) away from the connecting ring (203). An axially extending long groove (201c) is provided on the part of the plug (201) between the limiting step (201b) and the annular groove (201a). A limiting pin (204a) is provided on the inner side of the positioning ring (204). The limiting pin (204a) is embedded in the long groove (201c). A positioning pin (204b) is provided on the inner side of the end of the positioning ring (204) that contacts the connecting ring (203), and a second spiral groove (203c) is provided on the outer side of the connecting ring (203). The positioning pin (204b) is embedded in the second spiral groove (203c). The second spiral groove (203c) has the same number of turns as the first spiral groove (203b); The end of the connecting ring (203) away from the plug (201) is provided with a limiting hole (203d), a limiting groove (203e) is provided in the limiting hole (203d), a moving block (206) is provided in the limiting groove (203e), and a positioning shaft (206a) is provided in the moving block (206), which passes through the limiting hole (203d); a second spring (207) is provided between the moving block (206) and the limiting hole (203d); The socket body (101) has a fixing hole (101d) at the end near the plug (201) that corresponds to the limiting hole (203d). During the connection process, under the action of the frustum (101c), the connecting ring (203) performs a spiral motion and drives the positioning ring (204) to compress the first spring (205). When the conductive rod (202) is fully embedded in the socket (101b), the frustum (101c) is just located at the end of the first spiral groove (203b), and the end of the connecting ring (203) is in contact with the end of the socket body (101). The positioning pin (204b) is also at the end of the second spiral groove (203c). The distance between the positioning ring (204) and the connecting ring (203) is the largest. When it is necessary to separate the connector, the operating lever (103a) is pushed towards the plug (201) to drive the reset pin (103) to push the positioning shaft (206a), so that the limiting shaft retracts into the limiting hole (203d). At this time, under the action of the first spring (205), the linear motion of the positioning ring (204) is converted into the rotational motion of the connecting ring (203), and the rotation direction is opposite to the direction when connected, that is, it can automatically disengage at this time.

2. The connector for preventing miswiring of three-phase three-wire according to claim 1, characterized in that: The inner side of the connecting ring (203) is provided with an annular boss (203a), and the outer side of the plug (201) is provided with an annular groove (201a). The annular boss (203a) is embedded in the annular groove (201a).

3. The connector for preventing miswiring of three-phase three-wire according to claim 2, characterized in that: A first spring (205) is provided between the positioning ring (204) and the limiting step (201b).

4. The connector for preventing miswiring of three-phase three-wire according to claim 3, characterized in that: The axial length of the second spiral groove (203c) is the same as the length of the long groove (201c). When the limiting pin (204a) is located at the end of the long groove (201c), the positioning pin (204b) is simultaneously located at the end of the second spiral groove (203c).

5. The connector for preventing miswiring of three-phase three-wire according to claim 4, characterized in that: The socket body (101) is provided with a reset groove (101e) that penetrates the fixing hole (101d). The reset groove (101e) extends axially. A reset pin (103) is provided in the fixing hole (101d). The reset pin (103) is provided with a toggle rod (103a) that passes through the reset groove (101e). A third spring (104) is provided between the toggle rod (103a) and the end of the reset groove (101e) near the plug (201).

6. The connector for preventing miswiring of three-phase three-wire according to claim 5, characterized in that: The three sockets (101b) correspond to the positions of the three conductive rods (202), and the conductive sheet (102) and the conductive rod (202) are respectively connected to their respective wires.

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