CN109449834B - Quick power supply connecting device for 10kV overhead distribution line - Google Patents
Quick power supply connecting device for 10kV overhead distribution line Download PDFInfo
- Publication number
- CN109449834B CN109449834B CN201811307254.2A CN201811307254A CN109449834B CN 109449834 B CN109449834 B CN 109449834B CN 201811307254 A CN201811307254 A CN 201811307254A CN 109449834 B CN109449834 B CN 109449834B
- Authority
- CN
- China
- Prior art keywords
- hole
- clamping groove
- power supply
- plug
- insulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009826 distribution Methods 0.000 title claims abstract description 52
- 239000012212 insulator Substances 0.000 claims description 59
- 239000004579 marble Substances 0.000 claims description 35
- 238000009413 insulation Methods 0.000 claims description 34
- 238000003780 insertion Methods 0.000 claims description 27
- 230000037431 insertion Effects 0.000 claims description 27
- 239000004020 conductor Substances 0.000 claims description 17
- 230000005684 electric field Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract description 3
- 238000003032 molecular docking Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000006855 networking Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000000819 phase cycle Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
Landscapes
- Cable Accessories (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
The invention discloses a quick power supply connecting device for a 10kV overhead distribution line, which is fixedly arranged on a specific electric pole of the 10kV overhead distribution line which is verified by power supply guarantee evaluation, and the quick access power supply of a medium-voltage mobile emergency power supply vehicle can be realized at any time by only one comprehensive small team through the 10kV distribution line after the device is arranged, and a quick butt plug of a cable of the medium-voltage mobile emergency power supply vehicle is matched with a connecting component of the device; the device can also realize that the distribution line provided with the device is quickly connected into other adjacent power distribution lines provided with the device through equipment such as a bypass cable, a bypass load switch and the like, so as to realize power conversion, and the quick butt plug of the bypass equipment cable is matched with the connecting component of the device.
Description
Technical Field
The invention relates to a rapid power supply connection device for a 10kV overhead distribution line.
Background
The power supply is the most outstanding public safety guarantee demand at present, and the development and the manufacture of the power supply guarantee emergency industrial equipment are accelerated.
At present, an emergency power supply is directly connected into a 10kV power distribution network overhead line through a 10kV cable. The power supply is directly connected into the system through a 10kV cable in a power failure operation connection mode or a live operation connection mode. The mode of directly accessing the overhead line of the power distribution network through the 10kV cable mainly has the following defects:
1. when a power supply is accessed through a 10kV cable in a power failure operation mode, the power supply of an access line user needs to be interrupted;
2. when a power supply is accessed through hot-line work through a 10kV cable, special work type hot-line work personnel are required to carry out the access, and the safety risk of the work is high;
3. when the access work is carried out, the arrangement work of cables, vehicles and bypass equipment is complicated on site, and the access work flow is more;
4. when the switching-in work is carried out, the switching-in operation, the electric test, the live working, the generator networking and the bypass operation are carried out in a multi-work professional cooperation mode, the input of manpower and material resources are high, the cooperation is difficult, and the working efficiency is low;
5. from planning access to on-site task completion, the time requirement is more than 2 days, and the work is time-consuming;
6. the method has the advantages that the access difficulty is high, the influence of factors such as multi-variety professional cooperation and time consumption is low, the intention of operators for developing emergency power supply work is low, and the high-value equipment assets are trapped, and meanwhile the power supply service is influenced.
Disclosure of Invention
The invention provides a rapid power supply connection device for a 10kV overhead distribution line, which overcomes the defects existing in the background technology. The technical scheme adopted for solving the technical problems is as follows:
10kV overhead distribution line fast power supply connecting device, its characterized in that: it comprises the following steps:
the box body is provided with an insulator mounting hole;
the insulation connecting assembly comprises an insulator and a connecting assembly, wherein the lower end of the insulator is provided with a stress cone, the insulator is fixedly connected to the box body, and the stress cone penetrates through an insulator mounting hole in the box body to enter the box body; the connecting assembly is fixedly connected to the insulator and is positioned in the box body, the stress cone stretches into the connecting assembly, and an insertion space is formed between the stress cone and the connecting assembly; the insulator is embedded with a conductor, the upper end of the conductor extends out of the insulator to form a conductive connecting part, the lower end of the conductor is provided with a first jack, and the first jack corresponds to the bottom end of the stress cone;
the quick butt joint plug is provided with a yielding groove at the upper end, and a conducting rod is arranged in the yielding groove; the quick butt-joint plug can be detachably connected with the connecting component, and when the quick butt-joint plug is assembled with the connecting component, the upper end of the quick butt-joint plug stretches into the insertion space and the conducting rod is in plug-in fit with the first jack.
In a preferred embodiment: the insulator further comprises a base body, an umbrella skirt body and a top end part which are sequentially connected, the base body is fixedly connected with the box body, the stress cone is connected with the base body, the umbrella skirt body longitudinally extends, first transverse protrusions and second transverse protrusions which are longitudinally staggered are arranged on the periphery of the umbrella skirt body, the length of each first transverse protrusion is smaller than that of each second transverse protrusion, and the conductor sequentially penetrates through the stress cone, the base body, the umbrella skirt body and the top end part and the upper end of the conductor stretches out of the top end part to form a conductive connecting part.
In a preferred embodiment: and an annular net-shaped electric field shielding piece is embedded in the insulator, the electric field shielding piece is embedded in the connecting part of the seat body and the stress cone, and the horizontal middle line of the electric field shielding piece is overlapped with the boundary line of the seat body and the stress cone.
In a preferred embodiment: the connecting assembly comprises a flange plate and bolts, wherein the flange plate is propped against the inner top surface of the box body, the bolts penetrate through the flange plate and the box body and then are in threaded fit with the base body so as to fixedly connect the insulator with the box body, and sealing elements are further arranged and clamped between the base body and the box body.
In a preferred embodiment: the connecting assembly further comprises a fixed sleeve, a movable sleeve, a marble, a first elastic piece, a second elastic piece, an inner limit clamping ring and an outer limit clamping ring, wherein the fixed sleeve is fixed at the lower end of the flange plate, a stress cone stretches into the fixed sleeve, an insertion space is formed between the stress cone and the fixed sleeve, and the fixed sleeve is provided with a first clamping slot hole which transversely penetrates through the fixed sleeve; the movable sleeve is movably sleeved outside the fixed sleeve, the first elastic piece is clamped between the movable sleeve and the fixed sleeve, the inner wall of the movable sleeve is provided with a second clamping groove, the second elastic piece is sleeved outside the stress cone and propped against the flange plate and the inner limit clamping ring, and the inner limit clamping ring is propped against the inner wall of the fixed sleeve; the marble is movably connected with the first clamping slot hole, the outer limiting snap ring is clamped outside the fixed sleeve, and the bottom end of the movable sleeve is abutted against the outer limiting snap ring.
In a preferred embodiment: the periphery of the quick butt-joint plug is provided with a third clamping groove, when the quick butt-joint plug stretches into the insertion space, the quick butt-joint plug extrudes the inner limiting snap ring to push the second elastic piece to compress until the third clamping groove corresponds to the first clamping groove hole, and the first elastic piece extrudes the movable sleeve under the action of self elasticity to push the marble into the first clamping groove hole and the third clamping groove so that the quick butt-joint plug is connected with the connecting component; when the movable sleeve is pushed by hand to compress the first elastic piece towards the first elastic piece until the second clamping groove is on the same straight line with the first clamping groove hole and the third clamping groove, the second elastic piece ejects the inner limiting snap ring to push the marble into the space formed by the second clamping groove and the first clamping groove hole, and the quick butt-joint plug can automatically withdraw from butt joint with the connecting component.
In a preferred embodiment: the first clamping slot is internally provided with a first step surface, the first step surface divides the first clamping slot into a large-diameter slot and a small-diameter slot which are arranged outside and inside, and the diameter of the marble is larger than that of the small-diameter slot and smaller than that of the large straight-hole slot.
In a preferred embodiment: the outer periphery of the fixed sleeve is provided with a second step surface, the inner wall of the fixed sleeve is provided with a fourth step surface, the inner periphery of the movable sleeve is provided with a third step surface, the first elastic piece is sleeved outside the fixed sleeve, two ends of the first elastic piece respectively prop against the second step surface and the third step surface, and the inner limiting snap ring props against the fourth step surface.
In a preferred embodiment: the first jack comprises a first node hole, a second node hole, a third node hole, a fourth node hole and a bell mouth which are sequentially connected, the diameter of the first node hole is smaller than that of the second node hole, the diameter of the second node hole is smaller than that of the third node hole, the diameter of the third node hole is larger than that of the fourth node hole, and the diameter of the second node hole is the same as that of the fourth node hole; the conductive rod comprises a guide head, a straight rod part and a round platform part which are sequentially connected, the diameter of the round platform part is larger than that of the straight rod part, the round platform part is connected with the straight rod part through an inclined surface, when the conductive rod is inserted into the first jack, the inclined surface is abutted against the horn mouth, the straight rod part passes through the fourth section hole and the third section hole until the second section hole is positioned, and the guide head is positioned in the second section hole.
In a preferred embodiment: the connecting device further comprises an insulation plug, the insulation plug is provided with a groove matched with the stress cone, the periphery of the insulation plug is provided with a fourth clamping groove, the upper end of the insulation plug is matched with the insertion space, when the upper end of the insulation plug is inserted into the insertion space, the insulation plug extrudes the inner limit clamping ring to push the second elastic piece to compress until the fourth clamping groove corresponds to the first clamping groove hole, and the first elastic piece extrudes the movable sleeve under the action of self elasticity to push the marble into the first clamping groove hole and the fourth clamping groove so that the insulation plug is connected with the connecting assembly; when the movable sleeve is pushed by hand to compress the first elastic piece towards the first elastic piece until the second clamping groove is on the same straight line with the first clamping groove hole and the fourth clamping groove, the second elastic piece ejects the inner limiting snap ring to push the marble into the space formed by the second clamping groove and the first clamping groove hole, and the insulating plug can automatically withdraw from butt joint with the connecting component.
Compared with the background technology, the technical proposal has the following advantages:
the connecting device is fixedly arranged on a specific electric pole of a 10kV overhead distribution line which is proved by power supply guarantee evaluation, the 10kV distribution line after the device is arranged can realize the quick access power supply of a medium-voltage mobile emergency power supply vehicle at any time only by a comprehensive small team, and a quick butt plug of a cable of the medium-voltage mobile emergency power supply vehicle is matched with a connecting component of the device; the device can also realize that the distribution line provided with the device is quickly connected into other adjacent power distribution lines provided with the device through equipment such as a bypass cable, a bypass load switch and the like, so as to realize power conversion, and the quick butt plug of the bypass equipment cable is matched with the connecting component of the device.
When the distribution line needs to be rapidly powered, the mobile power supply vehicle is driven to the side of the distribution line pole provided with the device, after a rapid access procedure is handled, the insulating plug on the device is taken down, and the cable rapid connection plug of the mobile power supply vehicle is inserted into the connection assembly of the connection device to supply power. The working procedures of on-site investigation, cable arrangement, vehicle placement, bypass equipment arrangement and the like of the original working mode are comprehensively simplified or canceled, and the access time is greatly shortened.
After the device is arranged on a distribution line, when a mobile power supply or other access power supplies are needed for supplying power, the power supply of a power supply user is not needed to be interrupted for connecting the power supplies.
After the device is installed on a distribution line, when a mobile power supply or other access power supplies are needed for supplying power, no special work live working personnel are needed to carry out live access, and unnecessary operation safety risks are reduced.
After the device is arranged on a distribution line, when a mobile power supply or other access power supplies are needed to supply power, complex switching operation, electric test, live working, multi-working professional cooperation and professional cooperation such as generator networking and bypass operation are not needed, and implementation can be carried out by a single team.
In summary, after the connecting device is installed on the distribution line, the operation efficiency and the operation safety coefficient of the distribution line connected with an external power supply can be comprehensively improved, so that the willingness of an operator to develop emergency power supply is comprehensively improved, the use efficiency of high-value equipment assets is improved, and the power supply reliability and the high-quality service capability of a power grid are improved.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic diagram showing a connection state of the connection device with an overhead distribution line and an access cable.
Fig. 1-1 is a schematic diagram showing a disconnection state of the connection device and the access cable.
Fig. 2 shows a schematic assembly of the insulator and the case.
Fig. 3 shows a schematic top view of the case.
Fig. 4 shows an assembly schematic of the insulator, the box and the flange.
Fig. 5 shows one of the assembly diagrams of the insulator, the connection assembly, the box, and the quick-connect plug, when the quick-connect plug is separated from the connection assembly.
Fig. 6 shows a second schematic assembly view of the insulator, the connection assembly, the box, and the quick docking plug, where the quick docking plug is connected to the connection assembly.
Fig. 7 shows one of the assembly diagrams of the insulator, the connection assembly, the box, and the insulating plug, where the insulating plug is separated from the connection assembly.
Fig. 8 shows one of the assembly diagrams of the insulator, the connection assembly, the box, and the insulating plug, where the insulating plug is connected to the connection assembly.
Fig. 9 is an exploded perspective view of the insulating connecting assembly.
Detailed Description
Referring to fig. 1 to 9, a preferred embodiment of a 10kV overhead distribution line rapid power supply connection device, the 10kV overhead distribution line rapid power supply connection device includes a box 100, an insulating connection assembly 200, a rapid docking plug 400, and an insulating plug 700.
The box body 100 is a cuboid, 3 insulator mounting holes 110 and 18 base fixing holes 111 are formed in the top surface of the box body 100, 6 base fixing holes 111,6 base fixing holes 111 corresponding to the periphery of each insulator mounting hole 110 are annularly arranged, and phase sequence cards 131 are arranged on the front surface and the top surface of the box body 100; mounting and fixing holes 112 are formed in the left and right supporting legs at the bottoms of the two sides of the box body; the left side surface of the box body is provided with an equipment nameplate 130 and an equipment nameplate mounting bracket 120; the two sides of the box body close to the top surface are provided with a hand lifting hanging handle 140; the lower right corner of the front face of the case 100 is provided with a ground sign 132 and a ground mounting bolt 121. Accordingly, as shown in fig. 2, the insulating connecting member 200 and the insulating plug 700 are also provided with three, respectively, to be suitable for a three-phase overhead distribution line.
The insulated connection assembly 200 includes an insulator and a connection assembly.
The insulator is of an integral casting molding structure. The insulator is provided with a stress cone 210, a seat 220, an umbrella skirt 230 and a top end 240, which are connected in sequence; the insulator has embedded therein an electrical conductor 300, an electric field shield 250. The insulator is secured to the housing 100 by a mount 220 and the stress cone 210 passes through the insulator mounting hole 110 in the housing and into the housing 100.
In this embodiment, the tip 240 may have a bent shape, or may have a straight line segment. The bent tip 240 has a better insulation effect than the tip 240 having a straight-line shape, especially in rainy days, and the bent tip 240 can prevent rainwater from entering the insulator along the conductor.
In this embodiment, the outer circumference of the umbrella skirt 230 of the insulator is provided with a first transverse protrusion 231 and a second transverse protrusion 232 which are longitudinally staggered, and the length of the first transverse protrusion 231 is smaller than that of the second transverse protrusion 232. As shown in fig. 3, the conductor 300 penetrates the stress cone 210, the seat 220, the umbrella skirt 230, and the tip 240 in this order.
In this embodiment, the upper end of the conductor 300 extends from the top end 240 to form a conductive connection portion 310, and the lower end thereof is provided with a first jack 320, where the first jack 320 corresponds to the bottom end of the insulator stress cone 210. As shown in fig. 4, the conductive connection portion 310 is flat, and has 2 screw holes 311 formed therein, and the screw holes 311 are used for bolting with the down conductor of the overhead line.
In this embodiment, the first jack 320 includes a first node hole, a second node hole, a third node hole, a fourth node hole, and a bell mouth that are sequentially connected, where the first node hole has a diameter smaller than the second node hole, the second node hole has a diameter smaller than the third node hole, the third node hole has a diameter larger than the fourth node hole, and the second node hole has a diameter equal to the fourth node hole.
In this embodiment, the insulator is further embedded with an electric field shielding member 250, and the electric field shielding member 250 has a ring-shaped mesh structure. In this embodiment, the electric field shield 250 is embedded in the connecting portion of the base 220 and the stress cone 210, and the horizontal middle line of the electric field shield overlaps with the boundary line of the base 220 and the stress cone 210; the electric field shielding pieces 250 are uniformly distributed on the outer side of the electric conductor by taking the electric conductor as a circle center; three ground connection bars 251 are provided outside the electric field shield 250. In this embodiment, the electric field shielding member 250 is made of stainless steel or plastic.
In this embodiment, the bottom surface of the base 220 is provided with an annular sealing groove 221 and six insulator fixing screw holes 222. The three ground connection bars 251 of the electric field shield 250 are respectively connected with three of the insulator fixing screw holes 222 to form a pair of ground connection channels.
The connection assembly is fixedly connected to the insulator and is positioned in the box body 100, the stress cone 210 extends into the connection assembly through the insulator mounting hole 110 on the box body, and an insertion space 211 is formed between the stress cone 210 and the connection assembly.
In this embodiment, the connection assembly includes a flange 500 and a bolt 510, the flange 500 abuts against the inner top surface of the case 100 and is provided with a flange screw hole 501, an external thread is provided at the bottom end of the flange 500, the bolt 510 passes through the flange screw hole 501 and the seat fixing hole 111 and then is screwed with the insulator fixing screw hole 222 on the seat 220 to fix the insulator to the case 100, a sealing member 520 is further provided, and the sealing member 520 is located in the annular sealing groove 221 and is sandwiched between the seat 220 and the case 100.
In this embodiment, the connection assembly further includes a fixed sleeve 600, a movable sleeve 610, a first elastic member 620, a second elastic member 630, an inner limit snap ring 640, a marble 650, and an outer limit snap ring 615.
The fixing sleeve 600 is fixed at the lower end of the flange 500, and the stress cone 210 extends into the fixing sleeve 600, and the insertion space 211 is formed between the stress cone 210 and the fixing sleeve 600; the fixed sleeve 600 is provided with 8 first clamping slot holes 611 which transversely penetrate through the fixed sleeve 600, a first step surface is arranged in the first clamping slot holes 611, the first step surface divides the first clamping slot holes into large-diameter slot holes and small-diameter slot holes which are arranged outside and inside, the diameter of the marble is larger than that of the small-diameter slot holes and smaller than that of the large-diameter slot holes, the marble is used for being placed into the marble 650, the diameter of the small-diameter slot holes is smaller than that of the marble 650, limit is formed on the marble 650, the marble 650 is prevented from falling into the space inside the inner wall of the fixed sleeve 600 completely, and meanwhile, the part of spheres of the marble 650 can be ensured to extend into the space inside the inner wall of the fixed sleeve 600 to form protruding clamping positions.
In this embodiment, the inner wall of the fixing sleeve 600 is further provided with a fourth step surface 617. The outer periphery of the fixing sleeve 600 is provided with a second step surface 613 and a fifth clamping groove 616. The top end of the fixing sleeve 600 is provided with an internal thread.
The movable sleeve 610 is movably sleeved outside the fixed sleeve 600, the first elastic piece 620 is clamped between the movable sleeve 610 and the fixed sleeve 600, and the inner wall of the movable sleeve 610 is provided with a second clamping groove 612; the second elastic element 630 and the inner limit snap ring 640 are sleeved outside the stress cone 210, the second elastic element 630 abuts against the flange 500 and the inner limit snap ring 640, and the inner limit snap ring 640 abuts against the fourth step surface 617; the marble 650 is movably attached to the first detent hole 611.
In this embodiment, the inner periphery of the movable sleeve 610 is provided with a third step surface 614, the first elastic member 620 is sleeved outside the fixed sleeve 600, and two ends of the first elastic member respectively prop against the second step surface 613 and the third step surface 614.
The outer limit snap ring 615 is installed in the fifth clamping groove 616, the bottom end of the movable sleeve 610 abuts against the outer limit snap ring 615, and the outer limit snap ring 615 is used for preventing the movable sleeve 610 from falling out.
The quick docking plug 400 is provided with a first soft insulator 430 and a connecting sleeve 450 sleeved outside the first soft insulator 430, a yielding groove 420 is formed at the upper end of the first soft insulator 430, and a conductive rod 421 is arranged in the yielding groove 420; the upper end of the quick docking plug 400 is matched with the insertion space 211 and the conductive rod 421 is in plug-in fit with the first jack 320. The third clamping groove 410 is arranged on the outer periphery of the connecting sleeve 450.
In this embodiment, the conductive rod 421 includes a guide head, a straight rod portion and a circular truncated cone portion that are sequentially connected, the diameter of the circular truncated cone portion is larger than that of the straight rod portion, and the circular truncated cone portion and the straight rod portion are connected by an inclined plane, when the conductive rod 421 is inserted into the first jack 320, the inclined plane abuts against the bell mouth, the straight rod portion passes through the fourth section hole and the third section hole until the second section hole is located, and the guide head is located in the second section hole.
In this embodiment, a watchband spring finger structure (not shown) is disposed at the third hole, and the straight rod portion is held tightly by the watchband spring finger structure when the conductive rod 421 is inserted into the first insertion hole 320.
When the upper end of the quick docking plug 400 is inserted into the insertion space 211, the stress cone 210 extends into the abdication groove 420, the conductive rod 421 is inserted into the first insertion hole 320, the connection sleeve 450 presses the inner limit snap ring 640 to push the second elastic element 630 to compress until the third clamping groove 410 corresponds to the first clamping groove 611, at this time, the first elastic element 620 presses the movable sleeve 610 under the self elastic force to push the marble 650 into the first clamping groove 611 and the third clamping groove 410 so as to connect the quick docking plug 400 with the connection assembly; at this time, the inner wall of the movable sleeve 610 forms a blocking wall for the marble 650, so as to ensure that the marble 650 is stably placed in the first clamping slot hole 611 and the third clamping slot 410, and a locking state is formed in which the quick docking plug 400 is connected with the connecting component, and in the locking state, the first soft insulator 430 on the quick docking plug 400 and the stress cone 210 are mutually extruded to form an insulating closed space;
when the movable sleeve 610 is pushed by hand to compress the first elastic member 620 toward the first elastic member 620 until the second clamping groove 612 is aligned with the first clamping groove hole 611 and the third clamping groove 410, the second elastic member 630 pushes the inner limiting snap ring 640 and the connecting sleeve 450 to push the marble 650 into the space formed by the second clamping groove 612 and the first clamping groove hole 611, so that the quick docking plug 400 can automatically withdraw from docking with the connecting assembly. The above process forms a detachable docking process for the quick connect plug 400 with the connection sleeve 450 docked and disconnected from the connection assembly.
In this embodiment, the insulation plug 700 includes a second soft insulator 710 and a connection sleeve 720 sleeved on the outer periphery of the second soft insulator 710. The second soft insulator 710 is provided with a groove 730 matched with the stress cone 210, the connecting sleeve 720 is provided with a fourth clamping groove 740, and the upper end of the insulating plug 700 is matched with the insertion space 211.
When the upper end of the insulation plug 700 is inserted into the insertion space 211, the insulation plug 700 presses the inner limit snap ring 640 to push the second elastic member 630 to compress until the fourth clamping groove 740 corresponds to the first clamping groove hole 611, and the first elastic member 620 presses the movable sleeve 610 under the action of self elasticity to push the marble 650 into the first clamping groove hole 611 and the fourth clamping groove 740 so as to connect the insulation plug 700 with the connection assembly; at this time, the inner wall of the movable sleeve 610 forms a blocking wall for the marble 650, so as to ensure that the marble 650 is stably placed in the first clamping slot hole 611 and the fourth clamping slot 740, and a locking state is formed in which the insulation plug 700 is connected with the connection assembly, and in the locking state, the second soft insulator 710 on the insulation plug 700 and the stress cone 210 are mutually extruded to form an insulation closed space;
when the movable sleeve 610 is pushed by hand to compress the first elastic member 620 toward the first elastic member 620 until the second clamping groove 612 is aligned with the first clamping groove hole 611 and the fourth clamping groove 740, the second elastic member 630 pushes the inner limiting snap ring 640 and the connecting sleeve 720 to push the marble 650 into the space formed by the second clamping groove 612 and the first clamping groove hole 611, so that the insulating plug 700 can automatically withdraw from the butt joint with the connecting assembly. The above process forms a detachable docking process for docking and detaching the insulation plug 700 from the connection assembly.
The assembling process of the box body is as follows:
the device nameplate mounting bracket 120 is welded to the left side surface of the box body 100, the device nameplate 130 is mounted on the mounting bracket 120, the grounding mounting bolt 121 is welded to the right lower corner of the front surface of the box body 100, the grounding nameplate 132 is mounted on the vertical upper side of the grounding mounting bolt 121, the phase sequence plate 131 is mounted on the top surface and the front surface of the box body 100, and the hand lifting hanging handles 140 are welded to the positions, close to the top surface, on both sides of the box body 100, as shown in fig. 2 and 3.
The assembly process of the insulating connecting component and the box body is as follows:
firstly, placing a sealing piece 520 in an annular sealing groove 221 on a base 220, then penetrating a stress cone 210 on an insulator through an insulator mounting hole 110 on the box body to extend into the box body 100, and then adjusting the position of a base fixing hole 111 to enable the base fixing hole 111 to correspond to an insulator fixing screw hole 222 one by one; sleeving the flange 500 outside the stress cone 210 and abutting against the inner top surface of the box body 100, adjusting the position of the flange 500 to enable the flange screw holes 501 to correspond to the base fixing holes 111, inserting bolts 510 into the flange screw holes 501 and the base fixing holes 111, screwing in the insulator fixing screw holes 222 to fixedly connect the flange 500, the box body 100 and the base 220, and ensuring that the sealing piece 520 is tightly clamped between the annular sealing groove 221 on the bottom surface of the base 220 and the top surface of the box body 100 after fixedly connecting;
next, 8 balls 650 are correspondingly placed into the 8 first clamping slots 611, the first elastic element 620 is sleeved outside the fixed sleeve 600, the movable sleeve 610 is placed between the fifth clamping slot 616 and the second step surface 613 by compressing the first elastic element 620 through the movable sleeve 610, the outer limit clamping ring 615 is installed in the fifth clamping slot 616, clamping positions of the movable sleeve 610 and the first elastic element 620 are formed, meanwhile, the balls 650 are placed into the space formed by the second clamping slot 612 and the first clamping slot 611, then the inner limit clamping ring 640 is placed into the fixed sleeve 600 and is propped against the fourth step surface 617, the second elastic element 630 is placed into the fixed sleeve 600 and is propped against the inner limit clamping ring 640, and then the assembled fixed sleeve 600 is fastened by compressing the second elastic element 630 to the inner thread and the outer thread at the bottom end of the flange 500 in a screwing manner, and at this time, the connection assembly of the insulation connection assembly 200 and the box body 100 is completed, as shown in fig. 5 and 7.
The assembly process of the insulating plug and the insulating connecting component is as follows:
the upper end of the insulation plug 700 is inserted into the insertion space 211 to form a locked state in which the insulation plug 700 is connected to the connection assembly, and in the locked state, the second soft insulator 710 on the insulation plug 700 and the stress cone 210 are pressed apart from each other to form an insulation closed space, as shown in fig. 7 and 8.
The assembling process of the connecting device installed on the electric pole is as follows:
the connecting device is arranged on a special fixing support 10 on a distribution line pole, and is fastened with the special fixing support 10 through bolts passing through a box body mounting hole 112.
The assembling process of the connecting device which is fixedly arranged on the special fixing support 10 and then connected with an external power supply comprises the following steps:
when the distribution line provided with the connecting device needs to be connected with an external power supply for supplying power, the isolating knife switch 12 is firstly disconnected, after the fact that the device has no voltage is confirmed, a grounding short wire is arranged on the grounding hanging ring 13, the device is ensured to be in a non-electric grounding state disconnected with the distribution line, at the moment, the A, B, C three-phase movable sleeve 610 is compressed to the first elastic element 620 by hands to enable the first elastic element 620 to be in the same straight line with the first clamping groove hole 611 and the third clamping groove 740 respectively, the second elastic element 630 ejects the inner limiting clamp ring 640 and the connecting sleeve 710 to push the marble 650 into a space formed by the second clamping groove 612 and the first clamping groove hole 611, the insulating plug 700 automatically withdraws from butt joint with the connecting assembly, and at the moment, the insertion space 211 appears;
then, the A, B, C three-phase access cable 11 with the quick docking plug 400 installed and connected with the external power supply is respectively spliced with the three corresponding insertion spaces 211, when the upper end of the quick docking plug 400 is inserted into the insertion spaces 211, the stress cone 210 stretches into the yielding groove 420, the conducting rod 421 is inserted into the first jack 320, the connecting sleeve 450 extrudes the inner limit clamping ring 640 to push the second elastic element 630 to compress until the third clamping groove 410 corresponds to the first clamping groove hole 611, at this time, the first elastic element 620 extrudes the movable sleeve 610 under the action of self elasticity to push the marble 650 into the first clamping groove hole 611 and the third clamping groove 410 so as to connect the quick docking plug 400 with the connecting component, at this time, the grounding wire is removed, and the isolating knife switch 12 is closed, so that the external power supply can be connected with the distribution line for supplying power. As shown in fig. 1.
The process of dismantling the external power supply after the connecting device is fixedly arranged on the electric pole is as follows:
when the external power supply finishes supplying power to the distribution line provided with the connecting device, after the external power supply is stopped and no current passes through the connecting device, the isolating disconnecting link 12 is disconnected firstly, and after the device is confirmed to have no voltage, the grounding shorting tab is arranged on the grounding hanging ring 13, so that the device is ensured to be in a non-electric grounding state disconnected with the distribution line; at this time, the movable sleeve 610 is pushed by hand toward the first elastic member 620 to compress the first elastic member 620 until the second clamping groove 612 is on the same line with the first clamping groove hole 611 and the third clamping groove 410, the second elastic member 630 pushes the inner limiting snap ring 640 and the connecting sleeve 450 to push the marble 650 into the space formed by the second clamping groove 612 and the first clamping groove hole 611, and the quick connecting plug 400 automatically exits from the butt joint with the connecting assembly, thereby freeing up the insertion space 211;
next, the upper ends of the A, B, C three-phase insulation plugs 700 are respectively inserted into the three insertion spaces 211, when the upper ends of the insulation plugs 700 are inserted into the insertion spaces 211, the connecting sleeve 710 presses the inner limit snap ring 640 to push the second elastic element 630 to compress until the fourth clamping groove 740 corresponds to the first clamping groove hole 611, the first elastic element 620 presses the movable sleeve 610 under the self-elastic force to push the marble 650 into the first clamping groove hole 611 and the fourth clamping groove 740 so as to connect the insulation plugs 700 with the connecting assembly, and at this time, the device enters a standby state as shown in fig. 1-1.
The connecting device is fixedly arranged on a specific electric pole of a 10kV overhead distribution line proved by power supply guarantee evaluation in advance, the 10kV distribution line after the device is arranged can realize the quick access power supply of a medium-voltage mobile emergency power supply vehicle at any time only by a comprehensive small team, and a quick butt plug of a cable of the medium-voltage mobile emergency power supply vehicle is matched with a connecting component of the device; the device can also realize that the distribution line provided with the device is quickly connected into other adjacent power distribution lines provided with the device through equipment such as a bypass cable, a bypass load switch and the like, so as to realize power conversion, and the quick butt plug of the bypass equipment cable is matched with the connecting component of the device.
When the distribution line needs to be rapidly powered, the mobile power supply vehicle is driven to the side of the distribution line pole provided with the device, after the rapid access procedure is completed, the insulation plug 700 on the device is taken down, and the cable rapid connection plug 400 of the mobile power supply vehicle is inserted into the connection assembly of the connection device to supply power. The working procedures of site investigation, cable arrangement, vehicle placement, bypass equipment arrangement and the like of the original working mode are comprehensively simplified or canceled, and the access time is greatly shortened;
after the device is arranged on a distribution line, when a mobile power supply or other access power supplies are needed for power supply, the power supply of a power supply user is not needed to be interrupted for power supply connection;
after the device is arranged on a distribution line, when a mobile power supply or other access power supplies are needed for supplying power, no special work live-line operators are needed to carry out live-line access, and unnecessary operation safety risks are reduced;
after the device is arranged on a distribution line, when a mobile power supply or other access power supplies are needed for supplying power, complex switching operation, electric test, live working, multi-variety professional cooperation and professional cooperation such as generator networking and bypass operation are not needed any more, and the device can be implemented by a single team;
in summary, after the connecting device is installed on the distribution line, the operation efficiency and the operation safety coefficient of the distribution line connected with an external power supply can be comprehensively improved, so that the willingness of an operator to develop emergency power supply is comprehensively improved, the use efficiency of high-value equipment assets is improved, and the power supply reliability and the high-quality service capability of a power grid are improved.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and therefore should not be taken as limiting the scope of the invention, for all changes and modifications that come within the meaning and range of equivalency of the claims and specification are therefore intended to be embraced therein.
Claims (8)
1.10kV overhead distribution line quick power supply connecting device, its characterized in that: it comprises the following steps:
the box body is provided with an insulator mounting hole;
the insulation connecting assembly comprises an insulator and a connecting assembly, wherein the lower end of the insulator is provided with a stress cone, the insulator is fixedly connected to the box body, and the stress cone penetrates through the insulator mounting hole to enter the box body; the connecting assembly is fixedly connected to the insulator and is positioned in the box body, the stress cone stretches into the connecting assembly, and an insertion space is formed between the stress cone and the connecting assembly; the insulator is embedded with a conductor, the upper end of the conductor extends out of the insulator to form a conductive connecting part, the lower end of the conductor is provided with a first jack, and the first jack corresponds to the bottom end of the stress cone;
the quick butt joint plug is provided with a yielding groove at the upper end, and a conducting rod is arranged in the yielding groove; the quick butt-joint plug is detachably connected with the connecting component, and when the quick butt-joint plug is assembled with the connecting component, the upper end of the quick butt-joint plug stretches into the insertion space and the conducting rod is in plug-in fit with the first jack;
the connecting assembly comprises a flange plate and bolts, wherein the flange plate is propped against the inner top surface of the box body, the bolts penetrate through the flange plate and the box body and then are in threaded fit with the base body so as to fixedly connect the insulator with the box body, and sealing elements are arranged in addition and clamped between the base body and the box body;
the connecting assembly further comprises a fixed sleeve, a movable sleeve, a marble, a first elastic piece, a second elastic piece, an inner limit clamping ring and an outer limit clamping ring, wherein the fixed sleeve is fixed at the lower end of the flange plate, a stress cone stretches into the fixed sleeve, an insertion space is formed between the stress cone and the fixed sleeve, and the fixed sleeve is provided with a first clamping slot hole which transversely penetrates through the fixed sleeve; the movable sleeve is movably sleeved outside the fixed sleeve, the first elastic piece is clamped between the movable sleeve and the fixed sleeve, the inner wall of the movable sleeve is provided with a second clamping groove, the second elastic piece is sleeved outside the stress cone and propped against the flange plate and the inner limit clamping ring, and the inner limit clamping ring is propped against the inner wall of the fixed sleeve; the marble is movably connected with the first clamping slot hole, the outer limiting snap ring is clamped outside the fixed sleeve, and the bottom end of the movable sleeve is abutted against the outer limiting snap ring.
2. The 10kV overhead distribution line quick power supply connection of claim 1, wherein: the insulator further comprises a base body, an umbrella skirt body and a top end part which are sequentially connected, the base body is fixedly connected with the box body, the stress cone is connected with the base body, the umbrella skirt body longitudinally extends, first transverse protrusions and second transverse protrusions which are longitudinally staggered are arranged on the periphery of the umbrella skirt body, the length of each first transverse protrusion is smaller than that of each second transverse protrusion, and the conductor sequentially penetrates through the stress cone, the base body, the umbrella skirt body and the top end part and the upper end of the conductor stretches out of the top end part to form a conductive connecting part.
3. The 10kV overhead distribution line quick power supply connection apparatus of claim 2, wherein: and an annular net-shaped electric field shielding piece is embedded in the insulator, the electric field shielding piece is embedded in the connecting part of the seat body and the stress cone, and the horizontal middle line of the electric field shielding piece is overlapped with the boundary line of the seat body and the stress cone.
4. The 10kV overhead distribution line quick power supply connection of claim 1, wherein: the periphery of the quick butt-joint plug is provided with a third clamping groove, when the quick butt-joint plug stretches into the insertion space, the quick butt-joint plug extrudes the inner limiting snap ring to push the second elastic piece to compress until the third clamping groove corresponds to the first clamping groove hole, and the first elastic piece extrudes the movable sleeve under the action of self elasticity to push the marble into the first clamping groove hole and the third clamping groove so that the quick butt-joint plug is connected with the connecting component; when the movable sleeve is pushed by hand to compress the first elastic piece towards the first elastic piece until the second clamping groove is on the same straight line with the first clamping groove hole and the third clamping groove, the second elastic piece ejects the inner limiting snap ring to push the marble into the space formed by the second clamping groove and the first clamping groove hole, and the quick butt-joint plug can automatically withdraw from butt joint with the connecting component.
5. The 10kV overhead distribution line quick power supply connection of claim 1, wherein: the first clamping slot is internally provided with a first step surface, the first step surface divides the first clamping slot into a large-diameter slot and a small-diameter slot which are arranged outside and inside, and the diameter of the marble is larger than that of the small-diameter slot and smaller than that of the large straight-hole slot.
6. The 10kV overhead distribution line quick power supply connection of claim 1, wherein: the outer periphery of the fixed sleeve is provided with a second step surface, the inner wall of the fixed sleeve is provided with a fourth step surface, the inner periphery of the movable sleeve is provided with a third step surface, the first elastic piece is sleeved outside the fixed sleeve, two ends of the first elastic piece respectively prop against the second step surface and the third step surface, and the inner limiting snap ring props against the fourth step surface.
7. The 10kV overhead distribution line quick power supply connection of claim 1, wherein: the first jack comprises a first node hole, a second node hole, a third node hole, a fourth node hole and a bell mouth which are sequentially connected, the diameter of the first node hole is smaller than that of the second node hole, the diameter of the second node hole is smaller than that of the third node hole, the diameter of the third node hole is larger than that of the fourth node hole, and the diameter of the second node hole is the same as that of the fourth node hole; the conductive rod comprises a guide head, a straight rod part and a round platform part which are sequentially connected, the diameter of the round platform part is larger than that of the straight rod part, the round platform part is connected with the straight rod part through an inclined surface, when the conductive rod is inserted into the first jack, the inclined surface is abutted against the horn mouth, the straight rod part passes through the fourth section hole and the third section hole until the second section hole is positioned, and the guide head is positioned in the second section hole.
8. The 10kV overhead distribution line quick power supply connection of claim 1, wherein: the connecting device further comprises an insulation plug, the insulation plug is provided with a groove matched with the stress cone, the periphery of the insulation plug is provided with a fourth clamping groove, the upper end of the insulation plug is matched with the insertion space, when the upper end of the insulation plug is inserted into the insertion space, the insulation plug extrudes the inner limit clamping ring to push the second elastic piece to compress until the fourth clamping groove corresponds to the first clamping groove hole, and the first elastic piece extrudes the movable sleeve under the action of self elasticity to push the marble into the first clamping groove hole and the fourth clamping groove so that the insulation plug is connected with the connecting assembly; when the movable sleeve is pushed by hand to compress the first elastic piece towards the first elastic piece until the second clamping groove is on the same straight line with the first clamping groove hole and the fourth clamping groove, the second elastic piece ejects the inner limiting snap ring to push the marble into the space formed by the second clamping groove and the first clamping groove hole, and the insulating plug can automatically withdraw from butt joint with the connecting component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307254.2A CN109449834B (en) | 2018-11-05 | 2018-11-05 | Quick power supply connecting device for 10kV overhead distribution line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307254.2A CN109449834B (en) | 2018-11-05 | 2018-11-05 | Quick power supply connecting device for 10kV overhead distribution line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109449834A CN109449834A (en) | 2019-03-08 |
| CN109449834B true CN109449834B (en) | 2024-03-22 |
Family
ID=65550913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811307254.2A Active CN109449834B (en) | 2018-11-05 | 2018-11-05 | Quick power supply connecting device for 10kV overhead distribution line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109449834B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152209A (en) * | 2020-09-30 | 2020-12-29 | 广东新电电力科技有限公司 | Mobile quick power restoration micro-network |
| CN113540840B (en) * | 2021-07-13 | 2023-10-03 | 国网浙江省电力有限公司宁波供电公司 | Full-insulation quick-connection box for pole-mounted device |
| CN114243368A (en) * | 2021-11-01 | 2022-03-25 | 国网浙江省电力有限公司电力科学研究院 | Misconnection-preventing high-voltage bypass live-line work device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0549150A (en) * | 1991-08-12 | 1993-02-26 | Hitachi Cable Ltd | Emergency recovery connector with cable for power cable |
| JPH0731045A (en) * | 1993-07-12 | 1995-01-31 | Hitachi Cable Ltd | Power cable joint |
| JPH0998530A (en) * | 1995-09-29 | 1997-04-08 | Showa Electric Wire & Cable Co Ltd | Premold insulation-type cable connection |
| JPH10136549A (en) * | 1996-10-31 | 1998-05-22 | Showa Electric Wire & Cable Co Ltd | Power cable connecting section |
| JPH10248151A (en) * | 1997-03-04 | 1998-09-14 | Showa Electric Wire & Cable Co Ltd | Electrifying cable connection |
| JP2003235147A (en) * | 2002-02-01 | 2003-08-22 | Showa Electric Wire & Cable Co Ltd | Prefabricated joint |
| CN103532081A (en) * | 2013-09-20 | 2014-01-22 | 天津沃尔法电力设备有限公司 | Stress cone and capacitive composite insulating high-voltage cable terminal for overhead line |
| CN203522113U (en) * | 2013-09-23 | 2014-04-02 | 广东吉熙安电缆附件有限公司 | High-voltage power cable quick connect device |
| CN105071335A (en) * | 2015-08-13 | 2015-11-18 | 江苏省电力公司常州供电公司 | Rapid plugging/pulling cable branching box |
| JP2017046486A (en) * | 2015-08-27 | 2017-03-02 | 沖縄電力株式会社 | Mobile power transformer equipment |
| CN108649353A (en) * | 2018-06-15 | 2018-10-12 | 贵州电网有限责任公司 | A kind of flexibility midium voltage cable fast joint device |
| CN208904555U (en) * | 2018-11-05 | 2019-05-24 | 厦门市众慧悦和科技有限公司 | A kind of 10kV overhead distribution is quickly for arrangements of electric connection |
-
2018
- 2018-11-05 CN CN201811307254.2A patent/CN109449834B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0549150A (en) * | 1991-08-12 | 1993-02-26 | Hitachi Cable Ltd | Emergency recovery connector with cable for power cable |
| JPH0731045A (en) * | 1993-07-12 | 1995-01-31 | Hitachi Cable Ltd | Power cable joint |
| JPH0998530A (en) * | 1995-09-29 | 1997-04-08 | Showa Electric Wire & Cable Co Ltd | Premold insulation-type cable connection |
| JPH10136549A (en) * | 1996-10-31 | 1998-05-22 | Showa Electric Wire & Cable Co Ltd | Power cable connecting section |
| JPH10248151A (en) * | 1997-03-04 | 1998-09-14 | Showa Electric Wire & Cable Co Ltd | Electrifying cable connection |
| JP2003235147A (en) * | 2002-02-01 | 2003-08-22 | Showa Electric Wire & Cable Co Ltd | Prefabricated joint |
| CN103532081A (en) * | 2013-09-20 | 2014-01-22 | 天津沃尔法电力设备有限公司 | Stress cone and capacitive composite insulating high-voltage cable terminal for overhead line |
| CN203522113U (en) * | 2013-09-23 | 2014-04-02 | 广东吉熙安电缆附件有限公司 | High-voltage power cable quick connect device |
| CN105071335A (en) * | 2015-08-13 | 2015-11-18 | 江苏省电力公司常州供电公司 | Rapid plugging/pulling cable branching box |
| JP2017046486A (en) * | 2015-08-27 | 2017-03-02 | 沖縄電力株式会社 | Mobile power transformer equipment |
| CN108649353A (en) * | 2018-06-15 | 2018-10-12 | 贵州电网有限责任公司 | A kind of flexibility midium voltage cable fast joint device |
| CN208904555U (en) * | 2018-11-05 | 2019-05-24 | 厦门市众慧悦和科技有限公司 | A kind of 10kV overhead distribution is quickly for arrangements of electric connection |
Non-Patent Citations (2)
| Title |
|---|
| 10kV电缆线路不停电作业旁路系统研究;牛捷;;中国电业(技术版)(11);全文 * |
| 15kV柔性旁路电缆的不停电抢修作业技术;罗俊华;蓝剑;苏勇;王恒;蔡志国;周勇杰;;高电压技术(04);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109449834A (en) | 2019-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109449834B (en) | Quick power supply connecting device for 10kV overhead distribution line | |
| US6042407A (en) | Safe-operating load reducing tap plug and method using the same | |
| CN108828415B (en) | GIS equipment, cable terminal connecting device for GIS and voltage withstand test method of cable terminal connecting device | |
| CN208188160U (en) | Electric wire connecting junction is combined with European connect-disconnect plug high-tension cable pressure test | |
| US10845392B2 (en) | Electrical connector having a sacrificial cap and integrated test point | |
| US20170338633A1 (en) | Quick connect and disconnect cable junction box | |
| US3401370A (en) | Separable connector for underground system | |
| CN210744716U (en) | Single core cable grounding box | |
| CN203760899U (en) | Voltage-withstanding experiment detachment-free type bus connection structure | |
| US4660909A (en) | Remote grounding device for subterranean power systems | |
| CN210007116U (en) | -type 10kV floor-type quick power supply and taking connecting device | |
| KR101905441B1 (en) | Elbow Insert and its application for live line replacement of the pad mounted transformer | |
| CN203377426U (en) | Anti-explosion pin | |
| CN103956669A (en) | Ground wire special for middle switch cabinet | |
| CN203871732U (en) | Special-purpose ground wire for built-in switch cabinet | |
| CN103762529A (en) | Cable sheath | |
| CN103944094A (en) | 10-kV handcart switch cabinet bus fixed contact ground method and special grounding device thereof | |
| CN203722151U (en) | Cable sheath | |
| CN208904555U (en) | A kind of 10kV overhead distribution is quickly for arrangements of electric connection | |
| KR102093601B1 (en) | Apparatus for connecting protective cover | |
| CN209844017U (en) | Plug-in type grounding wire installation device | |
| CN203367715U (en) | Grounding wire operating rod | |
| CN215579307U (en) | Quick connecting device of distribution box and generator | |
| CN216214846U (en) | Gas insulated metal enclosed switchgear and telescopic connecting device thereof | |
| CN104020325A (en) | High-voltage test shielding cover for 10kV ring main unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |