Secondary circuit on-line parallel connection device based on power transformation equipment terminal strip structure

Abstract

The utility model relates to a secondary circuit on-line parallel connection device based on a power transformation equipment terminal strip structure. The secondary circuit on-line parallel connection device comprises a main body terminal (1) and an existing terminal strip structure (2) of a relay protection screen cabinet. The main body terminal (1) comprises a through-flow fastening bolt (11), a main body terminal head (12), a through-flow sleeve (13) and a conducting core wire (14); the conducting core wire (14) is connected with the through-flow sleeve (13); the existing terminal strip structure (2) is provided with two wire interfaces (21); the through-flow sleeve (13) is firmly connected to the existing terminal strip structure (2) through the through-flow fastening bolt (11), and a conductive path is formed between the conductive core wire (14) and the two wire interfaces (21). The device is used for multi-wire parallel connection and wire jumper application scenes of a relay protection screen cabinet, has the advantages of rapidness, convenience and stability, and guarantees the safety and reliability of connection on the basis of improving the construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power system relay protection, and in particular to a secondary circuit online parallel connection device based on the terminal block structure of power equipment. Background Technology

[0002] Relay protection is one of the core technologies in power systems, and it is the most basic, important, and effective technical means to prevent and limit large-scale power outages. The accuracy and reliability of relay protection are crucial to the stability of the power grid, especially when ensuring large-scale power supply. As a key piece of equipment in the control system, the correctness and accuracy of the wiring of relay protection cabinets directly affect the safety of system operation. Currently, the terminal block wiring of relay protection cabinets mostly adopts the Philips cable access method. This wiring method is usually a "one-in, one-out" structure, that is, electrical connection is achieved through a single incoming and outgoing line.

[0003] However, traditional Philips cable wiring methods have the following problems:

[0004] 1. Wiring complexity: Due to the requirements of signal lines, the connection and patching of Philips cables at terminal blocks are relatively complex. When patching is required, dozens of cables often need to be connected at the same time, making the wiring very complicated.

[0005] 2. Stability issues: Because Philips cables rely on a single contact point for wiring, poor contact may cause relay protection failure, leading to equipment malfunction or failure to operate, thus affecting the stability of the power grid.

[0006] 3. Insufficient flexibility: The existing terminal block connection method only supports "1 in and 1 out", which cannot meet the needs of multiple lines in parallel or multiple lines in parallel. Especially in the design of relay protection cabinets, it is not conducive to dealing with complex parallel jumper requirements.

[0007] Therefore, existing technologies require an improved terminal block device to enhance the flexibility and stability of wiring in relay protection cabinets and simplify wiring operations. Utility Model Content

[0008] This utility model provides an online parallel connection device for secondary circuits based on the terminal block structure of power equipment, which is used for multi-line parallel connection and jumper application scenarios of relay protection cabinets. It has the advantages of being fast, convenient and stable, while ensuring the safety and reliability of the connection while improving construction efficiency.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0010] A secondary circuit online parallel connection device based on the terminal block structure of power equipment, applied to the relay protection cabinet of a substation, includes:

[0011] Main terminal (1) and existing terminal block structure (2) of relay protection cabinet;

[0012] The main terminal (1) includes a current-passing fastening bolt (11), a main terminal head (12), a current-passing sleeve (13), and a conductive core wire (14).

[0013] The conductive core wire (14) is connected to the flow sleeve (13);

[0014] The existing terminal block structure (2) has two wire interfaces (21);

[0015] The current-passing sleeve (13) is securely connected to the existing terminal block structure (2) by the current-passing fastening bolt (11), and a conductive path is formed between the conductive core wire (14) and the two wire interfaces (21).

[0016] Furthermore, the existing terminal block structure (2) also has a fastener (22) with a threaded hole.

[0017] Tighten the flow fastening bolt (11) into the threaded hole of the fastener (22).

[0018] Furthermore, the fastener (22) is connected to two wire interfaces (21);

[0019] The conductive materials of the flow-through fastening bolt (11), fastener (22) and flow-through sleeve (13) are the same;

[0020] After the current-carrying bolt (11) is tightened, a conductive path is formed between the conductive core wire (14) and the two wire interfaces (21).

[0021] Furthermore, the main body terminal (1) also includes a limiting structure.

[0022] The limiting structure includes a main insulating limiting post (15), a second insulating limiting post (16) and a third insulating limiting post (17), all of which are made of insulating material.

[0023] Furthermore, the main insulating limiting post (15) covers the current-passing bushing (13).

[0024] The second insulating limit post (16) and the third insulating limit post (17) are located on both sides of the main terminal (1) and are inserted into the limit post holes of the existing terminal block structure (2) by means of a snap-fit.

[0025] Furthermore, the main body terminal (1) also includes a core wire insulation layer (18).

[0026] The core wire insulation layer (18) covers the conductive core wire (14).

[0027] The beneficial effects achieved by this utility model are:

[0028] The secondary circuit online parallel connection device based on the terminal block structure of the power equipment includes a main terminal (1) and an existing terminal block structure (2) of the relay protection cabinet; the main terminal (1) includes a current-carrying fastening bolt (11), a main terminal head (12), a current-carrying sleeve (13) and a conductive core wire (14); the conductive core wire (14) is connected to the current-carrying sleeve (13); the existing terminal block structure (2) has two wire interfaces (21); the current-carrying fastening bolt (11) securely connects the current-carrying sleeve (13) to the existing terminal block structure (2), and a conductive path is formed between the conductive core wire (14) and the two wire interfaces (21);

[0029] Operators only need to connect the conductive core wire (14) to the input terminal of the main body terminal to realize the multi-line summary jumper requirements, avoiding complicated re-layout and wiring work;

[0030] The conductive core wire (14) forms a conductive path with the two wire interfaces (21), thereby realizing a one-in-two-out or one-out-two-in connection method, which is suitable for the multi-line parallel connection and jumper requirements of relay protection cabinets and has the advantages of being fast, convenient and stable. Attached Figure Description

[0031] Figure 1 This is a structural diagram of the online parallel connection device for secondary circuits based on the terminal block structure of power equipment according to this utility model;

[0032] Figure 2 This is a structural diagram of the single-chip plug-in and parallel connection of this utility model;

[0033] Figure 3 This is a connection diagram of two online parallel connection devices for secondary circuits based on the terminal block structure of power equipment according to this utility model;

[0034] Figure 4 This is a connection diagram of multiple online parallel connection devices for secondary circuits based on the terminal block structure of power equipment according to this utility model;

[0035] Figure 5 This is a summary diagram of the conductor cross-section of this utility model.

[0036] In the picture:

[0037] 1. Main terminal; 2. Existing terminal block structure; 11. Current-carrying fastening bolt; 12. Main terminal head; 13. Current-carrying sleeve; 14. Conducting core wire; 21. Wire interface; 22. Fastener; 15. Insulation limiting post; 16. Second insulation limiting post; 17. Third insulation limiting post; 18. Core wire insulation layer. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0039] like Figure 1 and Figure 2 As shown, a secondary circuit online parallel connection device based on the terminal block structure of power equipment is applied to the relay protection cabinet of a substation, comprising:

[0040] Main terminal (1) and existing terminal block structure (2) of relay protection cabinet;

[0041] The main terminal (1) includes a current-passing fastening bolt (11), a main terminal head (12), a current-passing sleeve (13), and a conductive core wire (14).

[0042] The current-passing fastening bolt (11) is located at the bottom of the device. Its function is to secure the current-passing sleeve (13) in the existing terminal block structure (2) to ensure the firmness and reliability of the entire wiring structure and avoid loosening of the connection due to vibration or external force.

[0043] The current-passing bushing (13) is used for conductive connection. Its inner wall design can effectively reduce resistance and ensure stable transmission of current signals.

[0044] The conductive core wire (14) is connected to the flow sleeve (13);

[0045] The existing terminal block structure (2) has two wire interfaces (21);

[0046] The current-passing sleeve (13) is securely connected to the existing terminal block structure (2) by the current-passing fastening bolt (11), and a conductive path is formed between the conductive core wire (14) and the two wire interfaces (21).

[0047] Priority, in Figure 1 In one embodiment, the existing terminal block structure (2) also has a fastener (22) with a threaded hole.

[0048] Tighten the flow fastening bolt (11) into the threaded hole of the fastener (22).

[0049] Priority, in Figure 1 In this embodiment, the fastener (22) is connected to two wire interfaces (21);

[0050] The conductive materials of the flow-through fastening bolt (11), fastener (22) and flow-through sleeve (13) are the same;

[0051] After the current-carrying bolt (11) is tightened, a conductive path is formed between the conductive core wire (14) and the two wire interfaces (21).

[0052] Priority, in Figure 1 In this embodiment, the main body terminal (1) further includes a limiting structure.

[0053] The limiting structure includes a main insulating limiting post (15), a second insulating limiting post (16) and a third insulating limiting post (17), all of which are made of insulating material.

[0054] Priority, in Figure 1 In the embodiment, the main insulating limiting post (15) covers the current-passing bushing (13).

[0055] The second insulating limit post (16) and the third insulating limit post (17) are located on both sides of the main terminal (1) and are inserted into the limit post holes of the existing terminal block structure (2) by means of a snap-fit.

[0056] The three insulating limit posts are arranged in a specific pattern, which not only restricts the position of the conductive core wire and prevents it from shifting, but also plays a role in isolation and insulation, thereby improving the overall stability and safety performance of the device.

[0057] Priority, in Figure 1 In one embodiment, the main terminal (1) further includes a core wire insulation layer (18).

[0058] The core wire insulation layer (18) covers the conductive core wire (14).

[0059] exist Figure 2 The diagram shown is a structural diagram of a single-piece plug-in parallel connector. If each existing terminal block structure of the relay protection cabinet is equipped with a single-piece plug-in parallel connector, then the relay protection cabinet contains multiple online parallel connection devices for secondary circuits based on the terminal block structure of the transformer equipment. The connection method of two online parallel connection devices for secondary circuits based on the terminal block structure of the transformer equipment is as follows. Figure 3 As shown.

[0060] In practical applications, the conductive core wires of multiple online parallel connection devices for secondary circuits based on the terminal block structure of power equipment are combined and connected into a single thick conductor, as shown in the following connection method. Figure 4 As shown, the summarized conductors are wrapped with the group insulation layer, as... Figure 5 As shown, to ensure electrical insulation and mechanical strength, the wiring terminals consist of bolted pins with connectors, facilitating connection to other devices.

[0061] The beneficial effects achieved by this utility model are:

[0062] The secondary circuit online parallel connection device based on the terminal block structure of the power equipment includes a main terminal (1) and an existing terminal block structure (2) of the relay protection cabinet; the main terminal (1) includes a current-carrying fastening bolt (11), a main terminal head (12), a current-carrying sleeve (13) and a conductive core wire (14); the conductive core wire (14) is connected to the current-carrying sleeve (13); the existing terminal block structure (2) has two wire interfaces (21); the current-carrying fastening bolt (11) securely connects the current-carrying sleeve (13) to the existing terminal block structure (2), and a conductive path is formed between the conductive core wire (14) and the two wire interfaces (21);

[0063] Operators only need to connect the conductive core wire (14) to the input terminal of the main body terminal to realize the multi-line summary jumper requirements, avoiding complicated re-layout and wiring work;

[0064] The conductive core wire (14) forms a conductive path with the two wire interfaces (21), thereby realizing a one-in-two-out or one-out-two-in connection method, which is suitable for the multi-line parallel connection and jumper requirements of relay protection cabinets and has the advantages of being fast, convenient and stable.

[0065] The above are merely embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the scope of the claims of this utility model pending approval.

Claims

1. A secondary circuit online parallel connection device based on the terminal block structure of power equipment, characterized in that, Relay protection cabinets used in substations include: The main terminal (1) and the existing terminal block structure (2) of the relay protection cabinet; The main terminal (1) includes a current-carrying fastening bolt (11), a main terminal head (12), a current-carrying sleeve (13), and a conductive core wire (14). The conductive core wire (14) is connected to the flow sleeve (13); The existing terminal block structure (2) has two wire interfaces (21). The current-passing sleeve (13) is securely connected to the existing terminal block structure (2) by the current-passing fastening bolt (11), and a conductive path is formed between the conductive core wire (14) and the two wire interfaces (21).

2. The online parallel connection device for secondary circuits based on the terminal block structure of power equipment according to claim 1, characterized in that, The existing terminal block structure (2) also has a fastener (22) with a threaded hole. The flow-through fastening bolt (11) is screwed into the threaded hole of the fastener (22).

3. The online parallel connection device for secondary circuits based on the terminal block structure of power equipment according to claim 2, characterized in that, The fastener (22) is connected to the two wire interfaces (21); The conductive materials of the flow-through fastening bolt (11), the fastener (22), and the flow-through sleeve (13) are the same; After the flow-through fastening bolt (11) is tightened, a conductive path is formed between the conductive core wire (14) and the two wire interfaces (21).

4. The online parallel connection device for secondary circuits based on the terminal block structure of power equipment according to claim 1, characterized in that, The main terminal (1) also includes a limiting structure. The limiting structure includes a main insulating limiting post (15), a second insulating limiting post (16) and a third insulating limiting post (17), all of which are made of insulating material.

5. The online parallel connection device for secondary circuits based on the terminal block structure of power equipment according to claim 4, characterized in that, The main insulating limiting post (15) covers the flow sleeve (13); The second insulating limiting post (16) and the third insulating limiting post (17) are disposed on both sides of the main body terminal (1) and are inserted into the limiting post holes of the existing terminal block structure (2) by means of a snap-fit.

6. The online parallel connection device for secondary circuits based on the terminal block structure of power equipment according to claim 1, characterized in that, The main terminal (1) also includes a core wire insulation layer (18); The core wire insulation layer (18) covers the conductive core wire (14).

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