Novel power-taking plugging device for ring main unit

Abstract

A novel power-taking plugging device used for a ring main unit comprises a wiring pile, a plugging head, a lower insulation sleeve and an upper insulation sleeve, the lower side of the wiring pile is provided with a clamping opening and a lower fixing port, the upper portion of a wire connected with one wire inlet end of an opening and closing switch in the ring main unit is installed on the lower side of the lower fixing port, and a base installed on the outer side of the wiring pile is installed on the ring main unit; the upper end of the wiring pile serves as a limiting rod, the upper end of the connecting plug is provided with an upper fixing port, and a wire connected with one wire outlet end of the generator is installed in the upper fixing port. The socket is inserted into the outer side of the wiring pile at the lower end of the limiting rod, and the upper insulating sleeve and the lower insulating sleeve are installed on the outer side of the connecting plug and the outer side of the wiring pile respectively. According to the utility model, a plurality of sets are cooperatively used, the external generator can supply power to corresponding electrical equipment in the ring main unit and the ring main unit can supply power to electrical loads through insertion or separation of the wiring piles and the connecting plugs, application connection and separation are more convenient, convenience is brought to operation of workers, and the working efficiency is correspondingly improved.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment technology for ring main units, and in particular to a new type of power supply plug-in device used in ring main units. Background Art

[0002] A ring main unit (RNB) is an electrical device whose electrical components are installed in a steel plate metal cabinet or assembled into a modular ring network power supply unit. Its core components include load switches, fuses, and circuit breakers. It offers advantages such as simple structure, small size, low price, improved power supply parameters and performance, and enhanced power supply safety. RNBs are used in production areas with power shortages or areas requiring continuous power supply (such as hospitals). They are typically paired with an internal combustion engine-driven generator. During a power outage, the generator's output power is directly fed into the RNB's feeder terminal, allowing the RNB to continue supplying power to relevant equipment when the mains power in the corresponding area fails.

[0003] The existing connection method between the ring main unit (RNB) and the generator output power supply generally involves installing terminal blocks at the top of the RNB, and then fixing the generator power output terminals onto the terminal blocks using nuts and other means (the terminal blocks located inside the RNB are connected to the inlet of a separate set of circuit breakers via wires, and the outlet of the circuit breakers is connected to the power input of the electrical load via separate wires). While this method meets practical needs to some extent, it is structurally limited. Because the terminal blocks and generator power output terminals are fixedly connected, separating the generator power output terminals from the terminal blocks for maintenance or subsequent reconnection is relatively cumbersome, causing inconvenience to staff and hindering work efficiency. Therefore, it is essential to provide a plug-in device that allows for convenient connection and disconnection. Utility Model Content

[0004] In order to overcome the shortcomings of the existing power supply mechanism used between the ring main unit and the generator due to structural limitations, as described in the background, this utility model provides a new type of power supply plug-in device for ring main units that connects the upper terminal block of the ring main unit and the power output terminal of the generator through a plug-in method, which brings convenience to the operator and improves the work efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] The new type of ring main unit uses a power supply connection device, including a terminal block, a connector, a lower insulating sleeve, and an upper insulating sleeve. The terminal block has a clamp on its lower side and a lower fixed port at its lower end. The upper part of the wire connected to one of the incoming terminals of the ring main unit's opening / closing switch is installed below the lower fixed port, and the middle part of the wire is clamped by the clamp. A base is installed on the outside of the terminal block, and the base has fixing holes around its perimeter. The inner side of the lower insulating sleeve is installed at the lower end of the terminal block on the base. The ring main unit has multiple fixing openings, each with multiple fixing holes A on its side. The lower end of the terminal block is inserted into one of these holes. The base is installed on the fixed opening; the outer diameter of the upper end of the terminal block is smaller than the outer diameter of the lower end, and the upper end serves as a limiting rod; the inner side of the connector is a hollow structure, with a closed upper end and an open lower end; the upper end of the connector has an upper fixed port, and the wire connected to one of the generator's output terminals is installed in the upper fixed port; the inner diameter of the hollow part of the connector is larger than the outer diameter of the terminal block limiting rod; the outer side of the lower end of the connector is a sloping structure serving as a socket, and the socket of the connector is inserted into the outer side of the terminal block at the lower end of the limiting rod; the inner side of the upper insulating sleeve is installed on the outer side of the connector and the terminal block located at the upper end of the base.

[0007] Furthermore, the terminals and connectors are made of conductive metal, and the base is an insulating ceramic structure.

[0008] Furthermore, the sockets are arranged in a ring with openings at intervals, and the outer diameter of the terminal block at the lower end of the limiting rod is larger than the inner diameter of the socket.

[0009] Furthermore, the inner diameters of the lower insulating sleeve and the upper insulating sleeve are smaller than the outer diameters of the terminal block and the connector.

[0010] Furthermore, the connector is equipped with multiple sets of limiting mechanisms, each including a spring, a positioning bead, and a guide tube. One side of the guide tube is a closed structure, and the other side is an open structure. The spring and the positioning bead are respectively movably sleeved inside the guide tube. Multiple positioning holes are distributed inside the connector, and the guide tubes of the multiple sets of limiting mechanisms are respectively installed in the multiple positioning holes.

[0011] Furthermore, the inner side of the lower end of the socket has an arc-shaped structure.

[0012] The beneficial effects of this utility model are as follows: This new model adopts multiple sets of equipment used in coordination, with the same number of power output terminals of the generator and multiple incoming terminals of a single set of opening and closing switches within the ring main unit. Through the insertion or disconnection of terminal blocks and connectors, it enables an external generator to supply power to the corresponding electrical equipment within the ring main unit, and the ring main unit to supply power to the electrical load. Because of the plug-in connection method, connection and disconnection are more convenient, bringing convenience to operators and correspondingly improving work efficiency. Based on the above, this utility model has good application prospects. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the overall planar cross-sectional structure and a partially enlarged structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the overall planar structure of this utility model. DETAILED DESCRIPTION

[0017] Figure 1 , 2As shown in Figure 3, the power supply connection device used in the new ring main unit includes a circular terminal block 1, a circular connector 2, a circular lower rubber insulating sleeve 3, and a circular upper rubber insulating sleeve 4. A "[" shaped clamp 101 is welded to the lower end of the terminal block 1. The lower end of the terminal block 1 has a concave lower fixed port 102 with internal threads. A hollow annular copper metal fixing ring is welded to the wire connected to the corresponding incoming terminal of a set of opening and closing switches inside the ring main unit (not shown in the figure). A copper bolt, threaded through the fixing ring, is screwed into the internal thread of the lower fixed port 102, fixing the fixing ring inside the lower fixed port 102. The lower end of the wire passes through the metal clamp... The terminal block 1 is clamped at 101; a base 103 is tightly fitted on the outer side of the middle part of the terminal block 1. The base 103 has a vertically penetrating fixing hole 104 around its perimeter. The inner side of the lower insulating sleeve 3 is tightly fitted onto the lower end of the terminal block 1 at the base, and the height of the lower insulating sleeve 3 is greater than the height of the terminal block 1 at the lower end of the base 103. The upper middle part of the ring main unit has multiple circular fixing openings spaced from left to right, with an inner diameter slightly larger than the outer diameter of the lower insulating sleeve. Each opening has multiple fixing holes A on its side. The lower ends of multiple sets of terminal blocks 1 of this invention are inserted into these fixing openings, and multiple bolts pass through the multiple fixing holes A of the base 103 of these terminal blocks. The system includes a fixed hole 104, multiple fixed holes A with multiple fixed openings, and multiple bolts with nuts screwed into their lower ends for fixing. Multiple sets of the new type of terminal block base 103 are installed on multiple openings of the ring main unit. The upper outer diameter of the terminal block 1 is smaller than the lower outer diameter, and the upper end serves as a limiting rod 105 (circular). The inner side of the connector 2 is a hollow structure 21, with a closed upper end and an open lower end. The upper middle part of the connector 2 has a recessed upper fixed port 22 with internal threads. A hollow annular copper metal fixing ring A is welded to the other side of the wire connected to one of the corresponding output terminals of the generator (not shown in the figure). A copper bolt, threaded through the fixing ring A, is screwed... Insert the fixing ring A into the internal thread of the upper fixed port 22 and fix it in the upper fixed port 22. The inner diameter of the hollow part inside the plug 2 is slightly larger than the outer diameter of the upper limit rod 105 of the terminal block, and the height is the same as the height of the limit rod 105. The lower outer side of the plug is a bevel structure as the socket 24. The socket 24 of the plug is vertically inserted into the outer side of the terminal block 1 at the lower end of the limit rod 105. The upper end of the upper insulating sleeve 4 is a closed structure. The inner side of the upper insulating sleeve 4 is tightly fitted on the plug 2 and the terminal block 1 on the outer side of the upper end of the base 103. There is an opening in the middle of the upper end of the upper insulating sleeve 4. The wire connected to the corresponding output terminal of the generator is led out to the upper outer end through the opening.

[0018] Figure 1 , 2As shown in Figure 3, the terminal block 1 and connector 2 are made of copper, while the base 103 is a ceramic structure. The connector has vertically distributed openings 25 at regular intervals in a ring (allowing the lower end of the connector 24 to be elastic and expand to lock onto the outside of the terminal block). The outer diameter of the terminal block 1 at the lower end of the limiting rod 105 is slightly larger than the inner diameter of the connector 24. The inner diameters of the circular lower rubber insulating sleeve 3 (for insulation) and the circular upper rubber insulating sleeve 4 (for insulation) are slightly smaller than the outer diameters of the terminal block 1 and connector 2. The connector is equipped with three sets of limiting mechanisms 23. Each limiting mechanism 23 includes a spring 231, a positioning bead 232, and a guide tube 233. The hollow guide tube 233 has a closed structure on the right and an open structure on the left. The positioning bead 232 and the spring 231 are respectively movably fitted inside the guide tube 233, with the positioning bead 232 located on the left. The outer diameter of the middle part of the positioning bead 232 is larger than the inner diameter of the left side of the guide tube 233 (where the inner diameter is smaller at the constriction point), and the outer diameter of the left side of the positioning bead 232 is smaller than the inner diameter of the left side of the guide tube 233. The left side of the positioning bead 232 is located outside the left end of the guide tube 233. Three positioning holes are distributed in a ring at intervals in the middle of the inner side of the connector. The guide tubes 233 of the three limiting mechanisms are tightly fitted into the three positioning holes. The left side of the guide tube 233 (at this moment, the inner side) and the inner side of the connector 2 are on the same plane. The inner side of the lower end of the socket 24 has an arc-shaped structure (to facilitate insertion into the outer side of the upper middle part of the terminal block 21).

[0019] Figure 1 , 2 As shown in Figure 3, this new type of device uses multiple sets (e.g., three sets) in tandem, which is consistent with the number of multiple (e.g., three) power output terminals of the generator and the number of multiple (e.g., three) incoming terminals of a single set of opening and closing switches in the ring main unit. In specific applications, the operator inserts the three sets of connectors 2 of this new type into the outer side of the upper end of the terminal block 1 from top to bottom. The hollow part on the inner side of the connector 2 is located outside the upper limit rod 105 of the terminal block and plays a positioning role for the connector 2. The socket 24 of the connector is vertically inserted into the outer side of the terminal block 1 at the lower end of the limit rod 105 (the lower end of the socket 24 is elastic and can effectively make close contact with the outer side of the terminal block for electrical conduction). In this way, the connection between the terminal block and the connector can be realized, and the electrical energy output by the generator enters the ring main unit. During the insertion of this novel connector into the terminal block, after the positioning beads 232 of the three sets of limiting mechanisms 23 contact the outer side of the middle of the terminal block, the terminal block will push the positioning beads 232 (circular structure) to move outward against the elastic force of the spring 231. After the terminal block and connector are engaged, the spring 231 will drive the positioning beads 232 to move inward. In this way, the inner side of the positioning beads 232 of the three sets of limiting mechanisms 23 can effectively contact the outer side of the terminal block, playing a stabilizing role and ensuring that the terminal block and connector are effectively engaged to transmit electrical energy. Because this novel connector uses a plug-in connection method, connection and separation are more convenient, bringing convenience to the operator and correspondingly improving work efficiency.

[0020] Those skilled in the art should understand that although this specification describes embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. Therefore, the scope of protection of this application is defined by the claims.

Claims

1. A power supply connection device used in a new type of ring main unit, comprising a terminal block, a connector, a lower insulating sleeve, and an upper insulating sleeve, characterized in that, The lower side of the terminal block has a clamp, and the lower end of the terminal block has a lower fixed port. The upper part of the wire connected to one of the incoming terminals of the opening and closing switch in the ring main unit is installed on the lower fixed port, and the middle part of the wire is clamped by the clamp. A base is installed on the outside of the terminal block, and there are fixing holes around the base. The inner side of the lower insulating sleeve is installed on the part of the terminal block located at the lower end of the base. The ring main unit has multiple fixing openings, and each opening has multiple fixing holes A on its side. The lower end of the terminal block is inserted into one of the fixing openings, and the base is installed on the fixing opening. The upper outer diameter of the pile is smaller than the lower outer diameter, and the upper end serves as a limiting rod. The inner side of the connector is hollow, with a closed upper end and an open lower end. The upper end of the connector has an upper fixed port, and the wire connected to one of the generator's output terminals is installed in the upper fixed port. The inner diameter of the hollow part of the connector is larger than the outer diameter of the terminal block limiting rod. The lower outer side of the connector has a sloping structure as a socket, and the socket of the connector is inserted into the outer side of the terminal block at the lower end of the limiting rod. The inner side of the upper insulating sleeve is installed on the outer side of the connector and the terminal block located on the upper end of the base.

2. The power supply connection device used in the novel ring main unit according to claim 1, characterized in that, The terminals and connectors are made of conductive metal, while the base is an insulating ceramic structure.

3. The power supply connection device used in the novel ring main unit according to claim 1, characterized in that, The sockets are arranged in a ring with openings at intervals, and the outer diameter of the terminal block at the lower end of the limit rod is larger than the inner diameter of the socket.

4. The power supply connection device used in the novel ring main unit according to claim 1, characterized in that, The inner diameters of the lower and upper insulating sleeves are smaller than the outer diameters of the terminals and connectors.

5. The power supply connection device used in the novel ring main unit according to claim 1, characterized in that, The connector is equipped with multiple sets of limiting mechanisms, including springs, positioning beads, and guide tubes. One side of the guide tube is a closed structure, and the other side is an open structure. The springs and positioning beads are movably sleeved inside the guide tubes. Multiple positioning holes are distributed inside the connector, and the guide tubes of the multiple sets of limiting mechanisms are installed in the multiple positioning holes.

6. The power supply connection device used in the novel ring main unit according to claim 1, characterized in that, The inner side of the lower end of the socket has an arc-shaped structure.

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