CN110752454A - Power line connecting device and operation method thereof - Google Patents
Power line connecting device and operation method thereof Download PDFInfo
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- CN110752454A CN110752454A CN201910951080.1A CN201910951080A CN110752454A CN 110752454 A CN110752454 A CN 110752454A CN 201910951080 A CN201910951080 A CN 201910951080A CN 110752454 A CN110752454 A CN 110752454A
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- power line
- fastening block
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- 238000000034 method Methods 0.000 title claims abstract description 7
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 10
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
- H01R4/42—Clamping area to one side of screw only
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Abstract
The invention discloses a power line connecting device and an operation method thereof, and belongs to the technical field of power construction. The power line connecting device mainly comprises a base, a fastening block, an electrode plate, an electrode and a fastening screw. The application of the invention increases the contact area of the connection part between the power lines or between the power lines and the power equipment, prevents the power line connection part from being exposed and enhances the connection tightness of the power lines. All the conductive metal leakage parts are subjected to insulation treatment. The invention is applied to the connection of power lines and power equipment such as distribution boxes, switches, sockets and the like or the interconnection of the power lines, reduces the resistance of the connection part of the power lines, has firm connection, avoids the occurrence of accidental touch leakage accidents, and improves the safety of power utilization.
Description
Technical Field
The invention relates to the technical field of power construction, in particular to a power line connecting device and an operation method thereof.
Background
Power lines are the carriers that transmit electrical energy. Electrical energy is transmitted from one end to the other end through power lines. In the process of electric energy transmission, a power line needs to be connected to connecting equipment such as a distribution box, a switch, a socket, a plug and the like. The cross-section of the power line is usually circular or quasi-circular in view of maximizing the use of metal conductors and minimizing the loss of electrical energy on the line. For the case of large current transmission, the terminals of the power lines are usually subjected to some special treatment, such as welding a special connector, a wire nose.
But in most cases the power lines are directly connected. The power line ends are wound around screws and then screwed to the base of the connection device, or the power lines are pressed against the device base with screws, or the two power lines are twisted together and wrapped with an insulating material.
This direct connection is prone to many problems. First, the contact surface is relatively small. The resistance of the contact surface is relatively large, and when the current of the electric appliance is relatively large, the contact surface can generate heat. If the heat cannot be dissipated in time, the local temperature will rise. Second, the conductive metal is exposed to the outside. If the sealing is not good, the electric shock accident is easy to happen. In addition, the twisted connection is not strong enough if it is not properly operated, and is easily separated, thereby causing an arc or a power failure.
Disclosure of Invention
The invention mainly solves the technical problem of providing a power line connecting device and an operation method thereof, which can increase the contact area when the power line is connected, reduce the contact surface resistance and avoid the temperature rise of the connecting part; the phenomenon of exposed conductive metal is eliminated, and the phenomenon of electric arc or power failure caused by twisting connection of a power line is avoided.
In order to achieve the above purpose, the invention adopts a technical scheme that: provides a power line connecting device, which comprises a base, a fastening block and an electrode plate and is characterized in that,
the base is hollow, the left end of the hollow part in the base is closed, the right end of the hollow part in the base is provided with a power line insertion opening, and the upper surface of the hollow part in the base is an inclined plane which is inclined from the lower left to the upper right;
the fastening block is positioned in the hollow part of the base, the upper end surface of the fastening block is an inclined surface with a lower left part and an upper right part, the inclined surface is arranged opposite to the upper surface of the hollow part in the base, and the middle part of the lower end surface of the fastening block is provided with a first groove;
the electrode plate is fixed on the lower surface of the hollow part in the base;
wherein the length directions of the first groove, the electrode plate and the lower surface of the hollow part of the base are all left and right,
when the fastening block moves towards the right end of the hollow part of the base, a gap is formed between the upper end surface of the fastening block and the upper surface of the hollow part of the base and gradually becomes larger, so that the first groove and the electrode plate are gradually loosened in contact;
when the fastening block moves towards the left end of the hollow part of the base, the gap between the upper end face of the fastening block and the upper surface of the hollow part of the base is gradually reduced, so that the first groove and the electrode plate are gradually and tightly contacted until being compacted.
Preferably, the first groove is provided in plurality.
Preferably, the electrode plate further comprises an electrode which penetrates through the lower part of the base and is electrically connected with the electrode plate.
Preferably, one electrode and one electrode plate form one electric connection unit, and the number of the electric connection units is one or more.
Preferably, when there are a plurality of the electrical connection units, any two of the electrical connection units are insulated from each other.
Preferably, the middle of the electrode plate is provided with a second groove, the first groove and the second groove are arranged oppositely from top to bottom, and the length direction of the second groove is left and right.
Preferably, the clamping device further comprises a fastening screw, the head of the fastening screw is located on the left side of the base, a screw rod of the fastening screw penetrates through the base and is fixedly connected with the fastening block, and a screw rod of the fastening screw is in threaded connection with the base.
Preferably, the fastening block and the base are made of insulating materials.
Preferably, the upper surface of the fastening block and the upper surface of the hollow part in the base are in a concave-convex structure in cross section, and the concave part of the upper surface of the hollow part in the base surrounds the convex part of the upper surface of the fastening block, so that the fastening block is prevented from moving transversely when moving left and right.
In order to achieve the above object, the second technical solution adopted by the present invention is: there is provided an operating method of a power line connection apparatus, characterized by comprising the steps of:
loosening the fastening screw to enable the fastening block to move towards the right end of the hollow part in the base, and increasing the gap between the upper end surface of the fastening block and the upper surface of the hollow part in the base to enable the first groove and the electrode plate to be gradually loosened in contact, so that the end part of a power line to be connected is inserted between the first groove and the electrode plate;
and screwing the fastening screw to enable the fastening block to move towards the left end of the hollow part in the base, reducing the gap between the upper end surface of the fastening block and the upper surface of the hollow part in the base, and gradually tightly contacting the first groove and the electrode plate until the power line, the first groove and the electrode plate to be connected are compacted.
The invention has the beneficial effects that: the invention increases the contact area when the power line is connected, reduces the contact surface resistance and avoids the temperature rise of the connection part; the phenomenon of exposed conductive metal is eliminated, and the phenomenon of electric arc or power failure caused by twisting connection of a power line is avoided.
Drawings
FIG. 1 is a schematic view of a power line connection device;
the parts in the drawings are numbered as follows: 1-fastening screw head, 2-fastening screw rod, 3-electrode plate, 4-power line outer insulating layer, 5-power line inner core, 6-fastening block, 7-fastening block and base contact inclined plane, 8-base and 6-1-first groove
FIG. 2 is a schematic diagram of a structure of a power line connection device;
FIG. 3 is a schematic diagram of a power line connection device;
the parts in the drawings are numbered as follows: 9-electrode
FIG. 4 is a schematic view of an improved electrode sheet
The parts in the drawings are numbered as follows: 3-1-second groove
FIG. 5 is a schematic cross-sectional view of the upper surface of the fastening block and the upper surface of the hollow portion of the base;
the parts in the drawings are numbered as follows: 6-2-upper surface of fastening block, 8-1-upper surface of hollow portion in base interior
FIG. 6 is a schematic view showing a handle moving structure of a fastening block
The parts in the drawings are numbered as follows: 10-handle, 11-bracket, 12-handle.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
The invention converts the winding connection of the traditional power line (including the winding of the end part around a screw or the twisting of two power lines) into the linear connection, can adjust the length of the linear connection part according to the actual requirement, increases the contact area of the power line connection compared with the winding connection, and simultaneously, the exposed outer surface of the conductive metal of the invention adopts the insulation treatment, thereby avoiding the exposed phenomenon of the conductive metal.
The structure and operation of the present invention are described in detail below with reference to the accompanying drawings:
fig. 1 shows a first structure of a power line connection device. The power line connecting device comprises a fastening screw head 1, a fastening screw rod 2, an electrode plate 3, a fastening block 6, a fastening block and base contact inclined plane 7, a base 8 and a first groove 6-1.
The inside cavity of base 8, the left end of the inside cavity of base 8 is sealed, the right-hand member opening of the inside cavity of base 8, the upper surface of the inside cavity of base 8 is the inclined plane (the fastening block and the base contact inclined plane 7 in figure 1) that the lower left side inclines to the upper right side, the up end of fastening block 6 is also the inclined plane that the lower left side inclines to the upper right side, two inclined planes are arranged oppositely, fastening block 6 is located the cavity of base 8, the lower terminal surface middle part of fastening block 6 sets up first recess 6-1. The electrode plate 3 is fixed on the lower surface of the hollow part in the base 8, and the length directions of the lower end surface of the fastening block 6, the first groove 6-1 and the electrode plate 3 are all left and right.
The head part 1 of the fastening screw is positioned at the left side of the base 8, the screw rod 2 of the fastening screw penetrates through the left end of the base 8 and is fixedly connected to the left end part of the fastening block 6, and the screw rod 2 of the fastening screw is in threaded connection with the base 8.
The length of the tightening screw 2 in the hollow of the base 8 can be adjusted by rotating the tightening screw head 1, so that the tightening block 6 moves to the left and right in the hollow of the base 8.
The fastening block 6 and the base 8 are made of insulating materials, so any two of the fastening screws (including the fastening screw head 1 and the fastening screw rod 2), the fastening block 6, the base 8 and the electrode plate 3 cannot conduct electricity, the end part is surrounded by the base when the electrode plate 3 is manufactured, and the electric leakage danger cannot occur when the power line connecting device is used.
When an external power line needs to be connected, the fastening screw is unscrewed, so that the fastening block 6 moves towards the right end of the hollow part in the base 8, and the gap between the upper end surface of the fastening block 6 and the upper surface of the hollow part in the base 8 is enlarged. Therefore, the contact between the first groove 6-1 and the electrode plate 3 is gradually loosened, the end part (mainly comprising the power line inner core 5 and a small part of the power line outer insulating layer 4) of the power line to be connected is inserted between the first groove 6-1 and the electrode plate 3, and the length of the power line inner core 5 inserted between the first groove 6-1 and the electrode plate 3 can be adjusted according to actual requirements; then, the fastening screw is tightened to move the fastening block 6 toward the left end of the hollow portion inside the base 8, thereby reducing the gap between the upper end surface of the fastening block 6 and the upper surface of the hollow portion inside the base 8. So that the first groove 6-1, the electrode plate 3 and the end part of the power line to be connected are contacted tightly until being compacted finally. The exposed part of the power line is the outer insulating layer 4 of the power line, so that the power line connecting device can not generate electric leakage danger when in use.
Fig. 2 shows a second structure of the power line connection device. Fig. 2 is a modification of fig. 1, in which a plurality of first grooves 6-1 are provided (two grooves in fig. 2 illustrate the positional relationship of the grooves). The power line connection device can be applied to the interconnection of two power lines (a zero line and a live line) on one hand, and is applied to the connection between a plurality of live lines or the connection between a plurality of zero lines on the other hand. This structure replaces the twisted connection between conventional power lines.
When a plurality of power lines need to be connected, the fastening screws are unscrewed, so that the fastening block 6 moves towards the right end of the hollow part in the base 8, and the gap between the upper end surface of the fastening block 6 and the upper surface of the hollow part in the base 8 is enlarged. Therefore, the contact between the first groove 6-1 and the electrode plate 3 is gradually loosened, the end part of each power line needing to be connected is inserted between one first groove 6-1 and the electrode plate 3, and the length of the power line inner core 5 inserted between the first groove 6-1 and the electrode plate 3 can be adjusted according to actual requirements; then, the fastening screw is tightened to move the fastening block 6 toward the left end of the hollow portion inside the base 8, and the gap between the upper end surface of the fastening block 6 and the upper surface of the hollow portion inside the base 8 is gradually reduced. So that the contact among the ends of the power lines to be connected, the first groove 6-1 and the electrode sheet 3 is gradually tight until the final compaction. Since the electrode sheet 3 is conductive, a plurality of power lines are conducted. The exposed part of the power line is the outer insulating layer 4 of the power line, so that the power line connecting device can not generate electric leakage danger when in use.
Fig. 3 shows a third configuration of the power line connection device. Fig. 3 is a modification of fig. 1, in which the electrode tab 3 is electrically connected to the electrode 9, and the electrode 9 passes through the base 8. The power line connection device of such a structure is mainly used for connecting a power line and connection equipment (such as a distribution box, a switch, a socket, and the like). The electrodes 9 communicate directly with the parts of the device where electrical conduction is required. One electrode piece 3 and one electrode 9 constitute one electrical connection unit. The number of the electric connection units of the structure is one or more according to the actual wiring requirement. When the number of the electric connection units is multiple, any two electric connection units are insulated. Each corresponding to one of the first recesses 6-1. For example, a single-pole switch requires only one electrical connection unit, a two-phase socket or switch requires two electrical connection units, a three-phase socket or switch requires three electrical connection units, and a distribution box requires a plurality of electrical connection units.
When an external power line needs to be connected, the fastening screw is unscrewed, so that the fastening block 6 moves towards the right end of the hollow part in the base 8, and the gap between the upper end surface of the fastening block 6 and the upper surface of the hollow part in the base 8 is enlarged. Therefore, the contact between the first groove 6-1 and the electrode plate 3 is gradually loosened, the end part of the power line needing to be connected is inserted between the first groove 6-1 and the electrode plate 3, and the length of the power line inner core 5 inserted between the first groove 6-1 and the electrode plate 3 can be adjusted according to actual requirements; then, the fastening screw is tightened to move the fastening block 6 toward the left end of the hollow portion in the base 8, thereby reducing the gap between the upper end surface of the fastening block 6 and the upper surface of the hollow portion in the base 8. So that the contact between the end of the power line to be connected, the first groove 6-1 and the electrode sheet 3 is gradually tightened until the final compaction. The exposed part of the power line is the outer insulating layer 4 of the power line, and the end part of the electrode 9 is positioned in the base 8 and is surrounded by the base 8. If the electrode 9 extends out of the base 8, the part extending out of the base 8 and the conductive part of the power connecting equipment are sealed by insulating materials, so that the leakage of the metal conductive part is avoided, and the electric leakage danger cannot occur when the power line connecting device is used.
Fig. 4 shows an improved structure of the electrode plate, wherein a second groove 3-1 is arranged in the middle of the electrode plate 3, and the second groove 3-1 is arranged in the left-right direction and is vertically opposite to the first groove 6-1. The number of the second grooves 3-1 is the same as that of the first grooves 6-1, and both the grooves exist in pairs.
Fig. 5 shows a cross section of the upper surface of the fastening block and the upper surface of the hollow part inside the base, and a concavo-convex structure is formed between the upper surface 6-2 of the fastening block 6 and the upper surface 8-1 of the hollow part inside the base 8. The convex portion of the fastening block 6 is surrounded by the concave portion of the hollow portion inside the base 8, thereby preventing the fastening block 6 from moving in the lateral direction when moving left and right. For example, the upper surface 6-2 of the fastening block 6 may have a rectangular, trapezoidal, semicircular or triangular structure, and the corresponding upper surface 8-1 of the hollow portion inside the base 8 has a rectangular, trapezoidal, semicircular or triangular structure.
Fig. 6 shows a handle moving structure of the fastening block, and the fastening screw in fig. 1 can be replaced by a handle 10 for the purpose of moving the fastening block 6 left and right. The handle 10 is of a ring structure, the cam shaft is connected with the outer ring through a handle 12, and the rotating shaft is fixed on the left side wall of the base 8 through a support 11. One end of a cross rod of the handle 10 is fixedly connected to the left end of the fastening block 6, the cross rod of the handle 10 penetrates through the base 8, and the other end of the cross rod is annular and is sleeved on the top end of a cam of the handle 10. When the handle of the handle is rotated, the cam rotates to enable the cross rod to move left and right, and accordingly the fastening block 6 is driven to generate left and right displacement.
When the invention is applied, the length of the linear connection part is adjusted according to actual needs, compared with winding connection, the contact area of power line connection is increased, the contact surface resistance is reduced, the temperature rise of the connection part is avoided, and the electric arc or power failure phenomenon caused by winding connection is eliminated; meanwhile, the exposed parts of the conductive metal are subjected to insulation treatment, so that the phenomenon of exposure of the conductive metal is avoided.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A power line connecting device comprises a base, a fastening block and an electrode plate, and is characterized in that,
the base is hollow, the left end of the hollow part in the base is closed, the right end of the hollow part in the base is provided with a power line insertion opening, and the upper surface of the hollow part in the base is an inclined plane which is inclined from the lower left to the upper right;
the fastening block is positioned in the hollow part of the base, the upper end surface of the fastening block is an inclined surface with a lower left part and an upper right part, the inclined surface is arranged opposite to the upper surface of the hollow part in the base, and the middle part of the lower end surface of the fastening block is provided with a first groove;
the electrode plate is fixed on the lower surface of the hollow part in the base;
wherein the length directions of the first groove, the electrode plate and the lower surface of the hollow part of the base are all left and right,
when the fastening block moves towards the right end of the hollow part of the base, a gap is formed between the upper end surface of the fastening block and the upper surface of the hollow part of the base and gradually becomes larger, so that the first groove and the electrode plate are gradually loosened in contact;
when the fastening block moves towards the left end of the hollow part of the base, the gap between the upper end face of the fastening block and the upper surface of the hollow part of the base is gradually reduced, so that the first groove and the electrode plate are gradually and tightly contacted until being compacted.
2. The power line connection device according to claim 1, wherein the first recess is provided in plurality.
3. The power line connection device according to claim 1, further comprising an electrode passing through a lower portion of the base and electrically connected to the electrode tab.
4. The power line connection device according to claim 3, wherein one of said electrodes and one of said electrode tabs constitute one or more electrical connection units.
5. The power line connection device according to claim 4, wherein when the plurality of electrical connection units are provided, any two of the electrical connection units are insulated from each other.
6. The power line connection device according to any one of claims 1 to 5, wherein a second groove is provided in a middle portion of the electrode tab, the first groove and the second groove are arranged opposite to each other in a vertical direction, and a length direction of the second groove is left and right.
7. The power line connection device according to any one of claims 1 to 5, further comprising a fastening screw, a head of the fastening screw being located to the left of the base, a shank of the fastening screw passing through the base and fixedly connected to the fastening block, and a shank of the fastening screw being threadedly connected to the base.
8. The power line connection device according to any one of claims 1 to 5, wherein the fastening block and the base are made of an insulating material.
9. The power line connection device according to any one of claims 1 to 5, wherein the upper surface of the fastening block and the upper surface of the hollow portion inside the base have a concave-convex structure in cross section, and the concave portion of the upper surface of the hollow portion inside the base surrounds the convex portion of the upper surface of the fastening block, thereby preventing the fastening block from moving laterally when moving left and right.
10. The operation method of the power line connection apparatus according to claim 7, characterized by comprising the steps of:
loosening the fastening screw to enable the fastening block to move towards the right end of the hollow part in the base, and increasing the gap between the upper end surface of the fastening block and the upper surface of the hollow part in the base to enable the first groove and the electrode plate to be gradually loosened in contact, so that the end part of a power line to be connected is inserted between the first groove and the electrode plate;
and screwing the fastening screw to enable the fastening block to move towards the left end of the hollow part in the base, reducing the gap between the upper end surface of the fastening block and the upper surface of the hollow part in the base, and gradually tightly contacting the first groove and the electrode slice until the power line to be connected, the first groove and the electrode slice are compacted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201910951080.1A CN110752454A (en) | 2019-10-08 | 2019-10-08 | Power line connecting device and operation method thereof |
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CN201910951080.1A CN110752454A (en) | 2019-10-08 | 2019-10-08 | Power line connecting device and operation method thereof |
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CN110752454A true CN110752454A (en) | 2020-02-04 |
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CN201910951080.1A Pending CN110752454A (en) | 2019-10-08 | 2019-10-08 | Power line connecting device and operation method thereof |
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Citations (9)
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---|---|---|---|---|
US3447122A (en) * | 1967-09-20 | 1969-05-27 | Crawford Fitting Co | Connector for electrical conductors |
FR2220890A1 (en) * | 1973-03-09 | 1974-10-04 | Baggioli Giuseppe | Terminal clamp for vehicle battery - has lead secured by circular clamp with tightening bolt and wedge gripping end of lead |
ES407437A1 (en) * | 1971-10-12 | 1976-01-01 | Alsthom Cgee | An electrical terminal. (Machine-translation by Google Translate, not legally binding) |
CN202084661U (en) * | 2010-12-07 | 2011-12-21 | 陈振农 | Quick electric connection device of copper single line |
CN102790029A (en) * | 2011-05-16 | 2012-11-21 | 英飞凌科技股份有限公司 | Power semiconductor module and power semiconductor module system |
CN103151624A (en) * | 2013-03-07 | 2013-06-12 | 河南省电力公司驻马店供电公司 | Connecting clamp of distribution transformer bushing lead screw rod and line wire |
CN205692985U (en) * | 2016-06-14 | 2016-11-16 | 国网河南镇平县供电公司 | A kind of cable device |
CN207852949U (en) * | 2018-03-13 | 2018-09-11 | 许曼丽 | A kind of automatically controlled wiring unit of new energy |
CN208478711U (en) * | 2018-07-25 | 2019-02-05 | 四川飞宇电力股份有限公司 | A kind of switch base can increase cable attachment force |
-
2019
- 2019-10-08 CN CN201910951080.1A patent/CN110752454A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3447122A (en) * | 1967-09-20 | 1969-05-27 | Crawford Fitting Co | Connector for electrical conductors |
ES407437A1 (en) * | 1971-10-12 | 1976-01-01 | Alsthom Cgee | An electrical terminal. (Machine-translation by Google Translate, not legally binding) |
FR2220890A1 (en) * | 1973-03-09 | 1974-10-04 | Baggioli Giuseppe | Terminal clamp for vehicle battery - has lead secured by circular clamp with tightening bolt and wedge gripping end of lead |
CN202084661U (en) * | 2010-12-07 | 2011-12-21 | 陈振农 | Quick electric connection device of copper single line |
CN102790029A (en) * | 2011-05-16 | 2012-11-21 | 英飞凌科技股份有限公司 | Power semiconductor module and power semiconductor module system |
CN103151624A (en) * | 2013-03-07 | 2013-06-12 | 河南省电力公司驻马店供电公司 | Connecting clamp of distribution transformer bushing lead screw rod and line wire |
CN205692985U (en) * | 2016-06-14 | 2016-11-16 | 国网河南镇平县供电公司 | A kind of cable device |
CN207852949U (en) * | 2018-03-13 | 2018-09-11 | 许曼丽 | A kind of automatically controlled wiring unit of new energy |
CN208478711U (en) * | 2018-07-25 | 2019-02-05 | 四川飞宇电力股份有限公司 | A kind of switch base can increase cable attachment force |
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