Bus protection device, switching structure thereof and relay protection screen cabinet

Abstract

The utility model provides a bus protection device, a switching structure thereof and a relay protection screen cabinet. The bus protection device switching structure comprises a switching circuit board, a switching terminal socket, a switching terminal, an old terminal socket and an old terminal, wherein the switching terminal socket and the switching terminal are arranged in pairs; the old terminal socket and the old terminal are arranged in pairs; the switching terminal socket is connected to the switching circuit board; the conversion terminal is used for being electrically connected with the conversion terminal socket, and one end of the conversion terminal is electrically connected to the novel bus protection device; the old terminal socket is also connected to the switching circuit board and is electrically connected with the switching terminal socket; the old terminal is used for being electrically connected with the old terminal socket, and one end of the old terminal is electrically connected with an external power transmission circuit. According to the switching structure of the bus protection device, the utilization of old terminals of an old bus protection device is realized, end-to-end plug and play of a power distribution cable can be realized on the premise of not changing the old terminals and wiring, the operation steps are simplified, the replacement and maintenance time is saved, and the effect of quickly replacing a new relay protection device and an old relay protection device is realized.

Description

Technical Field

[0001] The present application belongs to the technical field of power transmission protection equipment, and more specifically, relates to a busbar protection device and its switching structure, and a relay protection panel cabinet. Background Art

[0002] As the scale of the power grid continues to expand, the importance of relay protection devices as the core guarantee for the safe and stable operation of the power grid is self-evident. However, a large number of relay protection devices that were put into use earlier are facing the need for replacement due to expiration of service. The current replacement method is to remove all old devices and old wiring, then install new devices and rewire and tie the wires. The transformation process is cumbersome and labor-intensive. The transformation causes long power outages on site, which has a great impact on the normal power supply of the power grid. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a busbar protection device and its switching structure, and a relay protection panel cabinet, so as to solve the technical problems existing in the prior art that the operation process is complicated, time-consuming and labor-intensive when replacing old relay protection equipment.

[0004] To achieve the above purpose, the technical solution adopted in this application is:

[0005] A busbar protection device switching structure is provided, comprising:

[0006] Adapter circuit board;

[0007] A transfer terminal socket connected to the transfer circuit board;

[0008] A transfer terminal, used to be electrically connected to a transfer terminal socket, one end of the transfer terminal being electrically connected to a busbar protection device;

[0009] A reused terminal socket is connected to the transfer circuit board and is electrically connected to the transfer terminal socket;

[0010] The reuse terminal is used to be electrically connected to the reuse terminal socket, and one end of the reuse terminal is electrically connected to an external power transmission circuit.

[0011] As a further improvement of the above technical solution:

[0012] Optionally, a transfer box is further included, on which the transfer circuit board is mounted. The transfer box serves as a bearing base of the transfer circuit board and is used to fix the transfer circuit board.

[0013] Optionally, the adapter box includes a front panel, a back panel and side panels that are arranged in a box shape, the front panel and the back panel are respectively located at two ends of the side panels, and the adapter circuit board is installed on the back panel.

[0014] Optionally, a handle is further provided on the front panel, which can facilitate the holding, moving or transporting of the adapter box.

[0015] Optionally, the adapter circuit board is a PCB circuit board.

[0016] Optionally, the position of the reused terminal socket on the adapter circuit board corresponds to the position of the reused terminal on the external power transmission circuit, so as to ensure that the reused terminal is always located near its original installation position, and the length of the old wiring does not need to be changed.

[0017] This application provides a bus protection device, including a bus protection device body and the above-mentioned bus protection device adapter structure.

[0018] This application also provides a relay protection panel cabinet, including a cabinet body and the above-mentioned bus protection device.

[0019] As a further improvement of the above technical solution:

[0020] Optionally, the adapter box is plugged into the cabinet body.

[0021] Optionally, a wiring groove is provided between the adapter box and the bus protection device, which is convenient for accommodating the connection cable between the adapter terminal and the new bus protection device, and makes full use of the space resources.

[0022] The beneficial effects of a bus protection device, its adapter structure and a relay protection panel cabinet provided by this application are as follows:

[0023] The bus protection device adapter structure provided by this application includes an adapter circuit board, a pair of adapter terminal sockets and adapter terminals, and a pair of reused terminal sockets and reused terminals. Among them, the adapter terminal socket is connected to the adapter circuit board; the adapter terminal is used for electrically connecting to the adapter terminal socket, and one end of the adapter terminal is electrically connected to the new bus protection device; the reused terminal socket is also connected to the adapter circuit board and is electrically connected to the adapter terminal socket to achieve electrical transmission with the adapter terminal socket. The reused terminal is used for electrically connecting to the reused terminal socket, and one end of the reused terminal is electrically connected to the external power transmission circuit. In order to reduce all steps such as the complete removal of the old device and old wiring, and re-wiring and tying, the external power transmission circuit retains the terminals with the same wiring terminal structure as the old bus protection device, that is, the reused terminals. Electrical transmission is achieved through the connection between the reused terminal and the reused terminal socket.

[0024] The bus protection device adapter structure of this application realizes the utilization of the reused terminals of the old bus protection device, so that it can achieve the plug-and-play of the power distribution cable end-to-end without changing the old reused terminals and wiring, simplifies the operation steps, saves the replacement and maintenance time, and realizes the function of quickly replacing the old and new relay protection devices.

[0025] The bus protection device and the relay protection panel cabinet of the present application both have the transfer structure of the bus protection device. Therefore, they also have the advantages of the transfer structure of the bus protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic exploded view of the transfer structure of the bus protection device provided by the present application;

[0028] Figure 2 is a schematic three-dimensional structure diagram of the transfer structure of the bus protection device provided by the present application Figure 1 ;

[0029] Figure 3 is a schematic three-dimensional structure diagram of the transfer structure of the bus protection device provided by the present application Figure 2 ;

[0030] Figure 4 is a schematic three-dimensional structure diagram of the relay protection panel cabinet provided by the present application.

[0031] Among them, each reference numeral in the figure:

[0032] 1. Transfer circuit board; 2. Transfer terminal socket;

[0033] 3. Transfer terminal; 4. Reused terminal socket;

[0034] 5. Reused terminal; 6. Transfer box;

[0035] 61. Front panel; 62. Back panel;

[0036] 63. Side panel; 64. Handle;

[0037] 7. Bus protection device body; 8. Cabinet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the following further details the present application with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0042] With the continuous expansion of the power grid scale, the relay protection device, as the core guarantee for the safe and stable operation of the power grid, is of self-evident importance. However, a large number of relay protection devices put into use early are facing the need for replacement due to their expiration of service. After several product updates and iterations of the relay protection device, the wiring terminals of the new bus protection device are quite different in structure from those of the old bus protection device to be transformed and cannot be directly compatible and paired. The current replacement method is to completely remove the old device and old wiring, and then install the new device and re-wire and tie the wires. The transformation process is cumbersome, with a large workload. The on-site power outage time caused by the transformation is long, which has a great impact on the normal power supply of the power grid. Therefore, it is urgent to solve the problems such as the complicated operation process, time-consuming and laborious when replacing the old relay protection equipment. To provide a structure that can quickly replace the old and new relay protection devices.

[0043] As Figures 1 to 3 shown, the present application provides a bus protection device transfer structure, including a transfer circuit board 1, a pair of transfer terminal sockets 2 and transfer terminals 3, and a pair of reused terminal sockets 4 and reused terminals 5.

[0044] Among them, the adapter terminal socket 2 is connected to the adapter circuit board 1; the adapter terminal 3 is used for electrical connection with the adapter terminal socket 2, and one end of the adapter terminal 3 is electrically connected to the new bus protection device; the reused terminal socket 4 is also connected to the adapter circuit board 1 and is electrically connected to the adapter terminal socket 2 to achieve electrical transmission with the adapter terminal socket 2. The reused terminal 5 is used for electrical connection with the reused terminal socket 4, and one end of the reused terminal 5 is electrically connected to the external power transmission circuit. To reduce steps such as the complete removal of the old device and old wiring and re-wiring and bundling, the external power transmission circuit retains terminals with the same terminal structure as the wiring terminals of the old bus protection device, that is, the reused terminal 5. Electrical transmission is achieved through the connection between the reused terminal 5 and the reused terminal socket 4.

[0045] The bus protection device adapter structure of this application realizes the utilization of the reused terminal 5 of the old bus protection device, so that end-to-end plug-and-play of the power distribution cable can be achieved without modifying the existing reused terminal 5 and wiring, simplifying the operation steps, saving replacement and maintenance time, and realizing the function of quickly replacing new and old relay protection devices.

[0046] As Figures 1 to 3 shown, in an embodiment of this application, the bus protection device adapter structure further includes an adapter box 6, and the adapter circuit board 1 is installed on the adapter box 6. The adapter box 6 serves as a carrier substrate for the adapter circuit board 1 to fix the adapter circuit board 1. The specification and size of the adapter box 6 also need to be selected according to the installation rack, such as a 19-inch standard relay protection panel cabinet rack. To improve the simplicity and aesthetics of the adapter box 6, the external spray color of the adapter box 6 should be consistent with the appearance color of the relay protection panel cabinet.

[0047] As Figures 1 to 3 shown, in an embodiment of this application, the adapter box 6 includes a front panel 61, a back panel 62, and side panels 63 that are arranged in a box-shaped enclosure. The front panel 61 is located at the front end of the adapter box 6 to face the operator directly. The back panel 62 is located at the rear end of the adapter box 6, and the side panels 63 are respectively located on the left and right sides of the adapter box 6, and the front panel 61 and the back panel 62 are respectively located at both ends of the side panels 63. The front panel 61, the back panel 62, and the side panels 63 are all sheet metal structures, formed by stamping and bending, and assembled into a whole through fasteners such as screws. When the adapter box 6 is installed on the relay protection panel cabinet, the front panel 61 faces the operator, and the back panel 62 faces the inside of the relay protection panel cabinet. Installing the adapter circuit board 1 on the back panel 62 can effectively shield the adapter circuit board 1 and reduce the interference of the external environment on the adapter circuit board 1, thereby better protecting the adapter circuit board 1. To reduce the weight of the adapter box 6, the side panels 63 can adopt a hollow design, that is, a through hole is provided in the middle of the side panels 63.

[0048] As Figures 1 to 3As shown, in one embodiment of the present application, in order to facilitate the movement and transportation of the transfer box 6, a handle 64 is further provided on the front panel 61. The handle 64 is C-shaped and protrudes outward. The handle 64 is specifically made of die-cast aluminum alloy, and its external paint color is consistent with the appearance color of the transfer box 6 or the relay protection panel cabinet. When in use, the transfer box 6 can be moved and carried by holding the handle 64.

[0049] In one embodiment of the present application, the adapter circuit board 1 specifically adopts a PCB circuit board. The PCB circuit board can accurately layout and solidify various electronic components and connection lines on an insulating substrate to form a tightly connected and compact whole. It not only has good circuit anti-interference ability, but also ensures the stability and reliability of signal transmission, and effectively reduces the risk of failure caused by poor contact or loose lines. The PCB circuit board also has the advantages of low cost and excellent protection performance.

[0050] In one embodiment of the present application, the position of the reused terminal socket 4 on the adapter circuit board 1 corresponds to the position of the reused terminal 5 on the external power transmission circuit to ensure that the reused terminal 5 is always located near the original installation position and the length of the old wiring does not need to be changed.

[0051] like Figure 4 As shown, the present application provides a busbar protection device, including a busbar protection device body 7 and the busbar protection device switching structure in the above-mentioned embodiment. When a fault occurs in the substation bus, if the fault is not removed in time, it will damage a large number of power equipment, destroy the stability of the system, and cause a power outage in the entire substation. In severe cases, it will cause the entire power system to collapse. The busbar protection device body 7 is an important device to ensure the safe and stable operation of the power grid. The busbar protection device body 7 uses the current differential protection principle. When the system operates normally or an external fault occurs, the sum of the currents flowing into the busbar is zero, that is, the differential current of the busbar differential protection, and the busbar protection device body 7 does not operate. When a busbar fault occurs, if the current equal to the current flowing into the fault point is greater than the action current set by the busbar protection device body 7, the busbar protection device body 7 will operate.

[0052] Since the busbar protection device of the present application has the busbar protection device transfer structure in the above embodiment, it also has the advantages of the busbar protection device transfer structure in the above embodiment.

[0053] like Figure 4 As shown, the present application also provides a relay protection panel cabinet, including a cabinet body 8 and the busbar protection device in the above embodiment, and the busbar protection device is installed in the cabinet body 8. Since the relay protection panel cabinet of the present application has the busbar protection device in the above embodiment, it also has the advantages of the busbar protection device in the above embodiment.

[0054] In an embodiment of the present application, the adapter box 6 is plugged into the cabinet 8. When maintenance, repair, or component replacement is required, the quick disassembly and assembly of the adapter box 6 on the cabinet 8 can be achieved.

[0055] In an embodiment of the present application, there is also a certain height gap between the adapter box 6 and the bus protection device. This gap not only serves as a spatial separation but also as a wiring duct, facilitating the accommodation of the connection cable between the adapter terminal 3 and the new bus protection device, thus making full use of the space resources.

[0056] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A busbar protection device switching structure, characterized in that: include: A transfer circuit board (1); A transfer terminal socket (2) connected to the transfer circuit board (1); A transfer terminal (3) is used to be electrically connected to the transfer terminal socket (2), and one end of the transfer terminal (3) is electrically connected to the busbar protection device; A reused terminal socket (4) is connected to the transfer circuit board (1) and is electrically connected to the transfer terminal socket (2); The reuse terminal (5) is used to be electrically connected to the reuse terminal socket (4), and one end of the reuse terminal (5) is electrically connected to an external power transmission circuit.

2. The busbar protection device switching structure according to claim 1, characterized in that: It also comprises a transfer box (6), and the transfer circuit board (1) is mounted on the transfer box (6).

3. The busbar protection device switching structure according to claim 2, characterized in that: The adapter box (6) comprises a front panel (61), a back panel (62) and a side panel (63) which are arranged in a box-like enclosure; the front panel (61) and the back panel (62) are respectively located at two ends of the side panel (63); and the adapter circuit board (1) is mounted on the back panel (62).

4. The busbar protection device switching structure according to claim 3, characterized in that: The front panel (61) is also provided with a handle (64).

5. The busbar protection device switching structure according to any one of claims 2 to 4, characterized in that: The adapter circuit board (1) is a PCB circuit board.

6. The busbar protection device switching structure according to any one of claims 2 to 4, characterized in that: The position of the reused terminal socket (4) on the adapter circuit board (1) corresponds to the position of the reused terminal (5) on the external power transmission circuit.

7. A busbar protection device, characterized in that: It comprises a busbar protection device body (7) and a busbar protection device transition structure as claimed in any one of claims 2 to 6.

8. A relay protection panel cabinet, characterized in that: It comprises a cabinet (8) and the busbar protection device as claimed in claim 7.

9. The relay protection panel cabinet according to claim 8, characterized in that: The transfer box (6) is plugged into the cabinet (8).

10. The relay protection panel cabinet according to claim 8, characterized in that: A wiring trough is provided between the transfer box (6) and the busbar protection device.

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