Intelligent wiring terminal for monitoring direct current grounding

Abstract

The invention relates to the technical field of wiring terminals, in particular to an intelligent wiring terminal for monitoring direct current grounding, which comprises an insulating shell, a first wiring terminal, a second wiring terminal, a connecting sheet and a current transformer, the rear side of the first binding post and the rear side of the second binding post make contact with the inner side of the rear portion of the insulating shell. The guide rail type direct-current multi-loop intelligent electric quantity collecting and monitoring device is reasonable and compact in structure, when the guide rail type direct-current multi-loop intelligent electric quantity collecting and monitoring device is used, the current transformer is arranged on the outer side of the connecting piece in a sleeving mode, the power line end of the current transformer is connected with the guide rail type direct-current multi-loop intelligent electric quantity collecting and monitoring device, and the first binding post and the second binding post are connected with connecting wires on the two sides In this way, when a direct current grounding phenomenon occurs to equipment corresponding to the wiring terminal, the monitoring device can quickly judge the position of the faulted wiring terminal according to the current signal collected by the current transformer, and maintenance personnel can quickly eliminate the fault of the corresponding wiring terminal according to the monitoring device, so that the fault time of a power grid is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of wiring terminals and is an intelligent wiring terminal for monitoring direct current grounding. Background Art

[0002] Terminal blocks are an accessory product used to achieve electrical connections. They are industrially classified as connectors. With the development of the electronics industry, the scope of use of terminal blocks is expanding, and there are more and more types. At present, terminal blocks can be divided into European terminal block series, plug-in terminal block series, transformer terminal blocks, building wiring terminals, track terminal block series, etc. One end of the track terminal block seals the metal sheet in insulating plastic, and holes for inserting wires are provided at both ends of the insulating plastic. Conductors are provided to connect the wires, which is suitable for interconnecting a large number of wires. In order to ensure that there is enough current passing through, the crimping area is designed to achieve reliable contact. When the track terminal block is used, the screw is loosened with a screwdriver. The rise of the screw drives the crimping terminal to rise, providing enough space for the wire access. The two wires are inserted from the two wire inlets respectively, and the screws are tightened to press the wires. The crimping terminal contacts the wire and the conductor at the same time, thereby connecting the two wires. The track terminal block is widely used in the control circuits of power plants and medium and large substations.

[0003] At present, the control circuits, relay protection devices, export circuits, and signal circuits of power plants and medium and large substations are all powered by DC power supplies. However, during use, due to unqualified circuit insulation materials, low insulation performance, or disrepair and severe aging, the secondary circuit insulation has damage defects, such as abrasion, smashing, and crushing, and moisture on rainy days, which can easily cause DC grounding.

[0004] If there is only one point of grounding in the DC system, it will not cause direct harm to the DC system, but the fault must be eliminated in time. Otherwise, if there is another point of grounding in the DC system, it may cause serious harm to the entire power system. When a two-point grounding fault occurs in the DC system, it may constitute a grounding short circuit, causing relay protection, signals, and automatic devices to malfunction or refuse to operate. It may even cause the DC fuse to blow, causing the protection and automatic devices and control circuits to lose power. If a DC grounding phenomenon occurs, maintenance personnel are required to eliminate the fault points one by one, but the number of track-type wiring terminals is large, and the process of eliminating the fault points is cumbersome and time-consuming, which prolongs the maintenance time and reduces the operation time of the power grid. Summary of the invention

[0005] The present invention provides an intelligent wiring terminal for monitoring DC grounding, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that it is relatively cumbersome to troubleshoot the existing wiring terminals after the DC grounding phenomenon occurs.

[0006] The technical solution of the present invention is achieved through the following measures: an intelligent terminal for monitoring DC grounding, comprising an insulating shell, a first terminal, a second terminal, a connecting piece and a current transformer, the first terminal and the second terminal are arranged at intervals on the left and right inside the insulating shell, the rear side of the first terminal and the rear side of the second terminal are in contact with the inner side of the rear part of the insulating shell, a left connecting hole is arranged on the left side of the first terminal, and a right connecting hole is arranged on the left side of the second terminal, a left threaded through hole and a right threaded through hole are arranged on the upper side of the first terminal and the upper side of the second terminal respectively, a left clamping bolt and a right clamping bolt are arranged on the upper side of the insulating shell at intervals on the left and right, the lower end of the left clamping bolt is screwed into the left threaded through hole, and the lower end of the right clamping bolt is screwed into the right threaded through hole, a connecting piece is installed between the first terminal and the second terminal, and a current transformer is mounted on the outer side of the middle part of the connecting piece.

[0007] The following are further optimizations and / or improvements to the above technical solutions: The front middle part of the above-mentioned insulating shell can be separated by a left mounting groove and a right mounting groove on the left and right sides, and both the left mounting groove and the right mounting groove are open forward. The first terminal is slidably installed in the left mounting groove, and a stepped left mounting hole with a larger upper part and a smaller lower part is provided on the upper left side of the insulating shell corresponding to the position of the first terminal. The lower end of the left mounting hole extends to the upper inner wall of the left mounting groove, and the upper part of the left clamping bolt is installed in the left mounting hole. The second terminal is slidably installed in the right mounting groove, and a stepped right mounting hole with a larger upper part and a smaller lower part is provided on the upper right side of the insulating shell corresponding to the position of the second terminal. The lower end of the right mounting hole extends to the upper inner wall of the right mounting groove, and the upper part of the right clamping bolt is installed in the left mounting hole.

[0008] There may be a test slot with an upward opening between the right side of the left installation slot and the left side of the right installation slot. The current transformer is fixedly installed in the test slot. A left notch that passes through the left and right sides is provided between the left part of the test slot and the right part of the left installation slot. A right notch that passes through the left and right sides is provided between the right part of the test slot and the left part of the right installation slot. The left end of the connecting piece passes through the left notch and is inserted into the left wiring hole. The right end of the connecting piece passes through the right notch and is inserted into the right wiring hole.

[0009] The left and right intervals on the lower side of the above-mentioned insulating shell can be provided with blocks that can be clamped together with the guide rail, and the lower front side and / or the lower rear side of the test slot are provided with test holes whose lower ends extend to the lower side of the insulating shell, and the two test holes are located between the two blocks.

[0010] The left side of the insulating shell may be provided with a left guide hole which is larger on the left and smaller on the right, and the right end of the left guide hole is connected to the left part of the left mounting groove. The right side of the insulating shell is provided with a right guide hole which is smaller on the left and larger on the right, and the left end of the right guide hole is connected to the right part of the right mounting groove.

[0011] The present invention has a reasonable and compact structure. When in use, the current transformer is sleeved on the outside of the connecting piece, and then the power line of the current transformer is connected to the current transformer instrument. The end of the power line of the current transformer can also be connected to the rail-type DC multi-circuit intelligent power collection and monitoring device, and the first terminal and the second terminal are respectively connected to the wiring on both sides. In this way, when the device corresponding to the terminal is DC grounded, the monitoring device can quickly determine the position of the faulty terminal according to the current signal collected by the current transformer, and the maintenance personnel can quickly eliminate the fault of the corresponding terminal according to the monitoring device, thereby shortening the fault time of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a schematic diagram of the front cross-sectional structure of embodiments one to five of the present invention.

[0013] The codes in the accompanying drawings are: 1 is an insulating shell, 2 is a first terminal, 3 is a second terminal, 4 is a connecting piece, 5 is a current transformer, 6 is a left clamping bolt, 7 is a right clamping bolt, 8 is a left wiring hole, 9 is a right wiring hole, 10 is a left mounting slot, 11 is a right mounting slot, 12 is a left mounting hole, 13 is a right mounting hole, 14 is a test slot, 15 is a left notch, 16 is a right notch, 17 is a block, 18 is a test hole, 19 is a left guide hole, 20 is a right guide hole, 21 is a guide rail, 22 is a wire, and 23 is a wiring. DETAILED DESCRIPTION

[0014] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0015] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0016] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figure 1As shown, the intelligent terminal block for monitoring DC grounding includes an insulating housing 1, a first terminal 2, a second terminal 3, a connecting piece 4 and a current transformer 5. The first terminal 2 and the second terminal 3 are arranged at intervals on the left and right inside the insulating housing 1. The rear side of the first terminal 2 and the rear side of the second terminal 3 are in contact with the inner side of the rear part of the insulating housing 1. A left wiring hole 8 is arranged on the left side of the first terminal 2, and a right wiring hole 9 is arranged on the left side of the second terminal 3. A left threaded through hole and a right threaded through hole are arranged on the upper side of the first terminal 2 and the upper side of the second terminal 3, respectively. A left clamping bolt 6 and a right clamping bolt 7 are arranged on the upper side of the insulating housing 1 at intervals on the left and right. The lower end of the left clamping bolt 6 is screwed into the left threaded through hole, and the lower end of the right clamping bolt 7 is screwed into the right threaded through hole. A connecting piece 4 is installed between the first terminal 2 and the second terminal 3, and a current transformer 5 is sleeved on the outer side of the middle part of the connecting piece 4.

[0017] According to the requirements, the current transformer 5 is an existing well-known technology, such as a miniature current transformer of model AKH-0.66 / W W-7. When in use, the current transformer 5 is sleeved on the outside of the connecting piece 4, and then the power cord of the current transformer 5 is connected to the current transformer of model CYVA, or the end of the power cord of the current transformer 5 is connected to the existing well-known model AMC200L-12DE / NB rail-type DC multi-circuit intelligent power acquisition monitoring device, and the first terminal 2 and the second terminal 3 are respectively connected to the wires 22 on both sides. In this way, when the device corresponding to the terminal is DC grounded, the monitoring device can quickly determine the location of the faulty terminal according to the current signal collected by the current transformer 5, and the maintenance personnel can quickly eliminate the fault of the corresponding terminal according to the monitoring device, thereby shortening the fault time of the power grid.

[0018] The above-mentioned wiring terminals can be further optimized and / or improved according to actual needs: Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, a left mounting groove 10 and a right mounting groove 11 are provided on the left and right sides of the front middle part of the insulating shell 1, and both the left mounting groove 10 and the right mounting groove 11 are open to the front, and the first terminal 2 is slidably installed in the left mounting groove 10, and a stepped left mounting hole 12 with a larger upper part and a smaller lower part is provided on the upper left side of the insulating shell 1 corresponding to the position of the first terminal 2, and the lower end of the left mounting hole 12 extends to the upper inner wall of the left mounting groove 10, and the upper part of the left clamping bolt 6 is installed in the left mounting hole 12, and the second terminal 3 is slidably installed in the right mounting groove 11, and a stepped right mounting hole 13 with a larger upper part and a smaller lower part is provided on the upper right side of the insulating shell 1 corresponding to the position of the second terminal 3, and the lower end of the right mounting hole 13 extends to the upper inner wall of the right mounting groove 11, and the upper part of the right clamping bolt 7 is installed in the left mounting hole 12.

[0019] During use, by setting the left mounting groove 10 and the right mounting groove 11, it is convenient to install the first terminal 2 and the second terminal 3, so that the first terminal 2 and the second terminal 3 can slide up and down in the left mounting groove 10 respectively, so that the wires 22 on both sides can be quickly fixed together by tightening the left clamping bolt 6 and the right clamping bolt 7, which is convenient to manufacture and use. By setting the left mounting hole 12 and the right mounting hole 13, the left clamping bolt 6 and the right clamping bolt 7 can be protected to avoid short circuit when the left clamping bolt 6 and the right clamping bolt 7 leak out, thereby reducing the failure rate of the terminal.

[0020] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, there is a test slot 14 with an upward opening between the right side of the left mounting slot 10 and the left side of the right mounting slot 11, the current transformer 5 is fixedly installed in the test slot 14, a left notch 15 extending from left to right is provided between the left part of the test slot 14 and the right part of the left mounting slot 10, a right notch 16 extending from left to right is provided between the right part of the test slot 14 and the left part of the right mounting slot 11, the left end of the connecting piece 4 passes through the left notch 15 and is inserted into the left wiring hole 8, and the right end of the connecting piece 4 passes through the right notch 16 and is inserted into the right wiring hole 9.

[0021] During use, the connecting piece 4 can be limited by setting the left notch 15 and the right notch 16. In this way, when the left clamping bolt 6 and the right clamping bolt 7 are tightened, the first terminal 2 and the second terminal 3 are quickly close to the lower side of the connecting piece 4 and the wire 22 whose end is located in the wiring hole is clamped. After the connecting piece 4 is limited, the relative position of the connecting piece 4 and the current transformer 5 can be guaranteed, avoiding the current transformer 5 being crushed after the connecting piece 4 moves downward when the left clamping bolt 6 and the right clamping bolt 7 are tightened.

[0022] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, blocks 17 that can be clamped together with the guide rail 21 are provided at intervals on the left and right sides of the lower side of the insulating shell 1, and a test hole 18 with a lower end extending to the lower side of the insulating shell 1 is provided on the front lower side and / or the rear lower side of the test slot 14, and the two test holes 18 are located between the two blocks 17.

[0023] During use, through the setting of the clamping block 17, the insulating housing 1 and the guide rail 21 can be flexibly disassembled and assembled, and maintenance is more convenient. By setting the test hole 18, the wiring 23 of the current transformer 5 can be passed through the test hole 18 and laid between the lower side of the insulating housing 1 and the groove of the guide rail 21, which can make the arrangement of the wiring 23 neater.

[0024] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 1As shown, a left guide hole 19 which is larger on the left and smaller on the right is provided on the left side of the insulating shell 1, and the right end of the left guide hole 19 is connected to the left part of the left mounting groove 10. A right guide hole 20 which is smaller on the left and larger on the right is provided on the right side of the insulating shell 1, and the left end of the right guide hole 20 is connected to the right part of the right mounting groove 11.

[0025] During use, by setting the left guide hole 19 and the right guide hole 20, it is convenient to pass the ends of the two wires 22 through the left guide hole 19 and the right guide hole 20 respectively and then insert them into the left wiring hole 8 and the right wiring hole 9, and then tighten the left clamping bolt 6 and the right clamping bolt 7, so that the lower inner side of the first terminal 2 and the second terminal 3 moves upward and approaches the lower end of the connecting plate 4 and clamps the ends of the two wires 22, which facilitates the connection between the first terminal 2 and the second terminal 3 and the wires 22, avoids the connection 23 of the current transformer 5 and the connection 23 of the first terminal 2 and the second terminal 3. The arrangement of the wires 22 and the connection 23 is more beautiful.

[0026] The above technical features respectively constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. An intelligent terminal block for monitoring DC grounding, characterized in that It includes an insulating shell, a first terminal, a second terminal, a connecting piece and a current transformer. The first terminal and the second terminal are arranged at intervals on the left and right inside the insulating shell. The rear side of the first terminal and the rear side of the second terminal are in contact with the inner side of the rear part of the insulating shell. The left side of the first terminal is provided with a left connecting hole that passes through the left and right sides, and the second terminal is provided with a right connecting hole that passes through the left and right sides. The upper side of the first terminal and the upper side of the second terminal are respectively provided with a left threaded through hole and a right threaded through hole. A left clamping bolt and a right clamping bolt are arranged at intervals on the left and right sides of the upper side of the insulating shell. The lower end of the left clamping bolt is screwed into the left threaded through hole, and the lower end of the right clamping bolt is screwed into the right threaded through hole. A connecting piece is installed between the first terminal and the second terminal, and a current transformer is mounted on the outer side of the middle part of the connecting piece.

2. The intelligent terminal block for monitoring DC grounding according to claim 1, characterized in that A left mounting groove and a right mounting groove are provided on the left and right sides of the front middle part of the insulating shell, and both the left mounting groove and the right mounting groove are open forward. The first terminal is slidably installed in the left mounting groove, and a stepped left mounting hole with a larger upper part and a smaller lower part is provided on the upper left side of the insulating shell corresponding to the position of the first terminal, and the lower end of the left mounting hole extends to the upper inner wall of the left mounting groove, and the upper part of the left clamping bolt is installed in the left mounting hole. The second terminal is slidably installed in the right mounting groove, and a stepped right mounting hole with a larger upper part and a smaller lower part is provided on the upper right side of the insulating shell corresponding to the position of the second terminal, and the lower end of the right mounting hole extends to the upper inner wall of the right mounting groove, and the upper part of the right clamping bolt is installed in the left mounting hole.

3. The intelligent terminal block for monitoring DC grounding according to claim 2, characterized in that There is a test slot with an upward opening between the right side of the left installation slot and the left side of the right installation slot. The current transformer is fixedly installed in the test slot. A left notch that passes through the left and right sides is provided between the left part of the test slot and the right part of the left installation slot. A right notch that passes through the left and right sides is provided between the right part of the test slot and the left part of the right installation slot. The left end of the connecting piece passes through the left notch and is inserted into the left wiring hole. The right end of the connecting piece passes through the right notch and is inserted into the right wiring hole.

4. The intelligent terminal block for monitoring DC grounding according to claim 3, characterized in that Blocks that can be clamped together with the guide rail are provided at intervals on the left and right sides of the lower side of the insulating shell, and a test hole with a lower end extending to the lower side of the insulating shell is provided on the lower front side and / or the lower rear side of the test slot, and the two test holes are located between the two blocks.

5. The intelligent terminal block for monitoring DC grounding according to claim 2, 3 or 4, characterized in that A left guide hole which is larger on the left and smaller on the right is provided on the left side of the insulating shell, and the right end of the left guide hole is connected to the left part of the left mounting groove. A right guide hole which is smaller on the left and larger on the right is provided on the right side of the insulating shell, and the left end of the right guide hole is connected to the right part of the right mounting groove.

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