CN103779806A - Method and system for preventing reverse power supply of power grid - Google Patents

Method and system for preventing reverse power supply of power grid Download PDF

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Publication number
CN103779806A
CN103779806A CN201410031602.3A CN201410031602A CN103779806A CN 103779806 A CN103779806 A CN 103779806A CN 201410031602 A CN201410031602 A CN 201410031602A CN 103779806 A CN103779806 A CN 103779806A
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China
Prior art keywords
ground
ground connection
adhesive tape
power supply
metal forming
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Granted
Application number
CN201410031602.3A
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Chinese (zh)
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CN103779806B (en
Inventor
胡超强
尤占山
安向阳
覃丹
王利江
卢广业
张仕欢
申常伟
陈雪儿
何平
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Guangzhou Panyu Cable Group Co Ltd
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Guangzhou Panyu Cable Group Co Ltd
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Priority to CN201410031602.3A priority Critical patent/CN103779806B/en
Publication of CN103779806A publication Critical patent/CN103779806A/en
Application granted granted Critical
Publication of CN103779806B publication Critical patent/CN103779806B/en
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Abstract

The invention discloses a method for preventing reverse power supply of a power grid. The method comprises the steps that a reverse power supply prevention device is preset in the air; a ground connection portion is arranged in an insulation overhead line; the periphery of the ground connection portion is wrapped by a metal foil; adhesive tape is wound at the two ends of the metal foil and extends outwards, and the adhesive tape covers the metal foil ends and a cable sheath at the same time; a protection outer shell is arranged and completely covers the metal foil and the adhesive tape. The invention further discloses a system for preventing reverse power supply of the power grid, the system comprises the reverse power supply prevention device which comprises the open-close type protection outer shell, the adhesive tape and the metal foil, the metal foil wraps the periphery of the ground connection portion in use, the adhesive tape is wound at the two ends of the metal foil and covers the cable sheath outside the metal foil ends and the outer end of the ground connection portion in use, and the protection outer shell is arranged on the periphery of the ground connection portion in use, and completely covers the wrapped metal foil and the wound adhesive tape. The system is simple in structure, convenient to use, effective for a long term, good in safety and high in maintenance efficiency.

Description

The method and system of the anti-down power supply of electrical network
Technical field
The present invention relates to a kind of power supply technical field, relate in particular to the method and system of the anti-down power supply of electrical network.
  
Background technology
Carry out at present grid maintenance, all after first the electric power system of maintenance circuit region being closed, maintainer again work high above the ground overhauls, and do not carry out anti-down for electric treatment, this mode, can not guarantee workmen's safety, because aerial cable line will inevitably be registered one's residence in wiring, and certain customers are (as school, market, factory etc.) generator can be installed, normal power supply when guaranteeing to have a power failure and do not affect the normal operation of electrical equipment, when power failure, can exist and from user's house generator, supply power on built on stilts backbone and make on backbone still charged phenomenon, if workmen is after the electric power system of breaking on backbone, in the situation that there is no anti-down confession electric treatment, rashly overhaul, certainly will there is great potential safety hazard, even there is maintainer for efficient behaviour, do not carry out grounding, threaten especially its life security.
  
Summary of the invention
One of task of the present invention be to provide a kind of simple in structure, easy to use, permanently effective, fail safe is good, improve the method for the anti-down power supply of electrical network of overhaul efficiency, two of task of the present invention is to provide a kind of system of the anti-down power supply of electrical network based on the method.
The present invention realizes by following technical proposals:
The method of the anti-down power supply of electrical network, it is characterized in that: the method is included on electrical network default aerial anti-down electric supply installation, and the setting of aerial anti-down electric supply installation comprises the following steps: the top of a, interconnection switch both sides in insulated over-head line, power network line strain section and terminal, branched line near breakout place and may on the circuit of anti-power transmission, ground connection position be set; B, at each ground connection position periphery coated metal paper tinsel; Between cable sheath outside two ends and two outer ends, ground connection position of c, metal forming after parcel, be wound around adhesive tape, adhesive tape is one section of cable sheath outside termination and the outer end, ground connection position of covering metal paper tinsel simultaneously; D, the guard shield of insulation, waterproof is set in ground connection position periphery, guard shield covers metal forming after parcel completely, adhesive tape after being wound around.
Described guard shield is opposite guard shield or plug-type guard shield, opening protection function shell corresponding site when anti-down power supply, expose described metal forming, in metal forming, connect an earth connection, one end of earth connection is connected with the metal forming after parcel, other end ground connection, is earth terminal, closes guard shield with waterproof when normal power supply.
The parcel scope of the metal forming in described step b is greater than the length at ground connection position, is extended down on the cable sheath outside two outer ends, grounding parts position outside the two ends of metal forming; Adhesive tape in described step c is the elasticity adhesive tape that blocks water, and its winding scope is extended down on cable sheath from metal forming; The elasticity that two outer ends of the guard shield in described steps d are separately positioned on outside two outer ends, ground connection position blocks water on adhesive tape, guard shield be wound around after the elasticity adhesive tape tight fit connection that blocks water.
The parcel scope of the metal forming in described step b is equal to or less than the length at ground connection position, and the distance between the two ends of the metal forming after parcel and its outer corresponding cable sheath equates; Adhesive tape in described step c comprises waterproof insulation tape and the elasticity adhesive tape that blocks water, the winding scope of waterproof insulation tape is extended down on cable sheath from metal forming, elasticity block water adhesive tape winding scope from be wound around waterproof insulation tape be extended down to outward on cable sheath; The elasticity that two outer ends of the guard shield in described steps d are separately positioned on outside two outer ends, ground connection position blocks water on adhesive tape, guard shield be wound around after the elasticity adhesive tape tight fit connection that blocks water.
The parcel scope of the metal forming in described step b is equal to or less than the length at ground connection position, and the distance between the two ends of the metal forming after parcel and its outer corresponding cable sheath equates; Adhesive tape in described step c is the single-coated foam of waterproof, insulation, and the winding scope of single-coated foam is extended down on cable sheath from metal forming; Two outer ends of the guard shield in described steps d are separately positioned on the single-coated foam outside two outer ends, ground connection position, the sealing gasket tight fit that single-coated foam and guard shield corresponding site inner side are provided with.
In described step a, the method to set up at ground connection position is: ground connection position is positioned with ground connection scale, ground connection scale comprises length scale and is arranged on the diameter scale at length scale two ends, the inner surface of diameter scale is globoidal structure, cambered surface size is less than or equal to semicircle cambered surface, two diameter scale is coaxial and cambered surface opening direction is consistent, diameter scale is its inner side near a side of length scale, a relative side is its outside: ground connection scale is connected on the relevant position that cable need arrange ground connection position, mark in inner side along diameter scale, part between two marks, be the position that arranges at ground connection position, remove ground connection scale, the cable sheath at position place is set with electrician's knife strip off ground connection position, expose Naked line, Naked line position is ground connection position, the outer ledge of the adhesive tape after being wound around in described step c is no more than the outer ledge of diameter scale, and it is wound around thickness and measures according to diameter scale.
Axially stagger along cable in the ground connection position of described adjacent wires.
The ground connection position of described adjacent wires is along the cable 145-150mm that axially staggers, and described guard shield is apart from the center line 500-600mm of aerial cable line Yong street code that supports fixed insulation overhead transmission line.
The method of the described anti-down power supply of electrical network also comprises step e: the default ground structure on ground, and described earth connection one end is connected with metal forming, and the other end is connected with ground structure.
Described ground structure comprises ground outlet and earth polar, and ground outlet one end is connected with earth point, and the other end is connected with earth polar, and described metal forming is connected with earth point by earth connection.
Described earth polar comprises horizontal earth polar and vertical earth polar, described ground outlet is connected with horizontal earth polar, one end, vertical earth polar is connected with horizontal earth polar, when using, squeezes in soil the other end, ground outlet is zinc-coated flat steel sheet, described earth point is formed by ground outlet bending, and two outer ends of the earth point of ground outlet are fixed on body of wall by setscrew.
Described flatly very zinc-plated round iron, the connected mode in described ground outlet and horizontal earth polar is seamless welding; Described vertically Zinc-coated angle steel very, the connected mode in itself and horizontal earth polar is seamless welding.
Described ground outlet and described horizontal earth polar connect round iron seamless welding by refuting, the lower end of ground outlet, horizontal earth polar are arranged in a groove that is arranged at ground while use with described vertical earth polar, in groove, backfill completely has the soil layer of the compaction in layers in the lower end, horizontal earth polar and the vertical earth polar that cover ground outlet, the lift height of soil layer is less than or equal to 200mm, and after compacting, soil layer compacting coefficient is more than or equal to 0.94.
The system of the anti-down power supply of electrical network, it is characterized in that: the system of the anti-down power supply of described electrical network comprises anti-down electric supply installation, anti-down electric supply installation comprises open-close type guard shield, adhesive tape and metal forming, metal forming is wrapped in the interconnection switch both sides in insulated over-head line while use, the top of power network line strain section and terminal, the ground connection position periphery arranging on the circuit near breakout place and the anti-power transmission of possibility of branched line, adhesive tape is wrapped in the two ends of metal forming while use, one section of cable sheath outside termination and the outer end, ground connection position of adhesive tape while covering metal paper tinsel, guard shield is arranged on ground connection position periphery while use, cover the metal forming after parcel completely simultaneously, adhesive tape after winding.
The parcel scope of described metal forming is greater than the length at ground connection position, is extended down on the cable sheath outside two outer ends, grounding parts position outside the two ends of metal forming; Described adhesive tape is the elasticity adhesive tape that blocks water, and its winding scope is extended down on cable sheath from metal forming; The elasticity that two outer ends of described guard shield are separately positioned on outside two outer ends, ground connection position blocks water on adhesive tape, guard shield be wound around after the elasticity adhesive tape tight fit connection that blocks water.
The parcel scope of described metal forming is equal to or less than the length at ground connection position, and the distance between the two ends of the metal forming after parcel and its outer corresponding cable sheath equates; Described adhesive tape comprises waterproof insulation tape and the elasticity adhesive tape that blocks water, and the winding scope of waterproof insulation tape is extended down on cable sheath from metal forming, and the elasticity winding scope of the adhesive tape waterproof insulation tape from being wound around that blocks water is extended down to outward on cable sheath; The elasticity that two outer ends of described guard shield are separately positioned on outside two outer ends, ground connection position blocks water on adhesive tape, guard shield be wound around after the elasticity adhesive tape tight fit connection that blocks water.
The parcel scope of described metal forming is equal to or less than the length at ground connection position, and the distance between the two ends of the metal forming after parcel and its outer corresponding cable sheath equates; Described adhesive tape is the single-coated foam of waterproof, insulation, and the winding scope of single-coated foam is extended down on cable sheath from metal forming; Two outer ends of described guard shield are separately positioned on the single-coated foam outside two outer ends, ground connection position.
Described ground connection position is arranged on adjacent cable line along the cable 145-150mm that axially staggers, and described guard shield is arranged on while use apart from supporting on the aerial cable line at center line 500-600mm place of aerial cable line Yong street code of fixed insulation overhead transmission line.
When the anti-down power supply of described anti-down electric supply installation, be connected with an earth connection by described metal forming, one end of ground connection is its earth terminal, the system of the anti-down power supply of described electrical network also comprises ground structure, ground structure comprises earth point, ground outlet and earth polar, ground outlet one end is connected with earth point, its other end is connected with earth polar, and the earth terminal of earth connection is connected with earth point.
Described earth polar comprises horizontal earth polar and vertical earth polar, described ground outlet is connected with horizontal earth polar, one end, vertical earth polar is connected with horizontal earth polar, when using, squeezes in soil the other end, ground outlet is zinc-coated flat steel sheet, described earth point is formed by ground outlet bending, and two outer ends of the earth point of ground outlet are fixed on body of wall by setscrew while use.
Described flatly very zinc-plated round iron, described ground outlet and horizontal earth polar connect round iron seamless welding by refuting, described vertically Zinc-coated angle steel very, the connected mode in itself and horizontal earth polar is seamless welding, the lower end of ground outlet, horizontal earth polar are arranged in a groove that is arranged at ground while use with vertical earth polar, in groove, backfill completely has the soil layer of the compaction in layers in the lower end, horizontal earth polar and the vertical earth polar that cover ground outlet, and the lift height of soil layer is less than or equal to 200mm.
The present invention has the following advantages: simple in structure, easy to use, permanently effective, fail safe is good, overhaul efficiency is high.
Accompanying drawing explanation
Fig. 1 is one of structural representation of the anti-down electric power system of the present invention;
Fig. 2 is the partial enlarged drawing at Fig. 1 A place;
Fig. 3 is the partial enlarged drawing at Fig. 2 A place;
Fig. 4 is the partial enlarged drawing at Fig. 2 B place;
Fig. 5 is the partial enlarged drawing at Fig. 2 C place;
Fig. 6 is the schematic diagram of earth polar and ground outlet in Fig. 5;
Fig. 7 is that in Fig. 6, horizontal earth polar and refuting of ground outlet connect schematic diagram;
Fig. 8 be the anti-down electric power system of the present invention structural representation two;
Fig. 9 is the structural representation of the aerial cable line that relates to of the anti-down method of supplying power to of electrical network of the present invention;
Figure 10 is that Fig. 9 arranges the structural representation behind ground connection position;
Figure 11 is the structural representation after Figure 10 coated metal paper tinsel;
Figure 12 is that Figure 11 is wound around the structural representation after waterproof insulation tape;
Figure 13 is that Figure 11 is wound around the structural representation after single-coated foam;
Figure 14 is that Figure 12 is wound around the structural representation that elasticity blocks water after adhesive tape;
Figure 15 is that Figure 14 arranges the structural representation after guard shield;
Figure 16 be in Figure 15 guard shield closure with the structural representation of waterproof;
Figure 17 is the structural representation of guard shield in Figure 16;
Figure 18 is the structural representation of the metal forming of the anti-down method of supplying power to use of electrical network of the present invention;
Figure 19 is the structural representation of the waterproof insulation tape of the anti-down method of supplying power to use of electrical network of the present invention;
Figure 20 is the block water structural representation of adhesive tape of elasticity that the anti-down method of supplying power to of electrical network of the present invention uses;
Figure 21 is the structural representation of the ground connection scale of the anti-down method of supplying power to use of electrical network of the present invention;
Wherein: 1-ground connection position, 2-metal forming, 3-cable sheath, 4-adhesive tape, the 41-adhesive tape that blocks water, 42-waterproof insulation tape, 43-single-coated foam, 5-guard shield, 6-earth connection, 7-earth point, 8-ground outlet, 9-earth polar, the horizontal earth polar of 91-, the vertical earth polar of 92-, 10-setscrew, 11-refutes and connects round iron, 12-ground connection scale, 121-length scale, 122-diameter scale, 13-aerial cable line, 14-maintenance department, 15-body of wall, 16-ground, 17-groove.
Embodiment
Below in conjunction with accompanying drawing, the anti-down method of supplying power to of electrical network of the present invention and system are further described:
Embodiment 1:
The aerial cable line 13 of the insulated over-head line of electrical network is fixed support by street code 18, when maintenance, need to carry out grounding, but because the situation of power supply of circuit that exists wiring to register one's residence, therefore simple backbone ground connection can not guarantee the personal safety that workmen overhauls in maintenance department 14, therefore need to carry out anti-down for electric treatment, guarantee the each end line Jun Buhuixiang maintenance department power supply of maintenance department 14.The method of the anti-down power supply of electrical network, be included on electrical network default aerial anti-down electric supply installation, the setting of aerial anti-down electric supply installation comprises the following steps: the top of a, interconnection switch both sides in insulated over-head line, power network line strain section and terminal, branched line near breakout place and may on the circuit of anti-power transmission, ground connection position 1 be set; B, at each ground connection position 1 periphery coated metal paper tinsel 2; Between cable sheath 3 outside two ends and the outer end, 1 liang, ground connection position of c, metal forming 2 after parcel, be wound around adhesive tape 4, adhesive tape 4 is one section of cable sheath outside termination and 1 outer end, ground connection position of covering metal paper tinsel 2 simultaneously; D, the guard shield 5 of insulation, waterproof is set in ground connection position 1 periphery, guard shield 5 covers metal forming 2 after parcel completely, adhesive tape 4 after being wound around.
Metal forming is preferably banded structure (as shown in figure 18), waterproof insulation tape and single-coated foam are preferably the structure (as shown in figure 19) of rolling, the adhesive tape that blocks water is banded structure (as shown in figure 20), a set of anti-down electric supply installation comprises and is placed in a belt metal foil in packing box, adhesive tape and a guard shield (as shown in figure 17).
Wherein guard shield 5 is opposite guard shield (as shown in figure 17) or plug-type guard shield, opening protection function shell 5 corresponding sites when anti-down power supply, expose metal forming 2, in metal forming 2, connect an earth connection 6, one end of earth connection 6 is connected with the metal forming 2 after parcel, other end ground connection, is earth terminal, closes guard shield 5 with waterproof when normal power supply.
Preferably following three kinds of the set-up modes of metal forming, adhesive tape and guard shield: one, the parcel scope of the metal forming 2 in step b is greater than the length at ground connection position 1, is extended down on the cable sheath 3 outside outer end, 1 liang of grounding parts position outside the two ends of metal forming 2; Adhesive tape 4 in step c is the elasticity adhesive tape 41 that blocks water, and its winding scope is extended down on cable sheath 3 from metal forming 2; The elasticity that two outer ends of the guard shield 5 in steps d are separately positioned on outside outer end, 1 liang, ground connection position blocks water on adhesive tape 41, guard shield 5 be wound around after elasticity adhesive tape 41 tight fit connections that block water; Its two, the parcel scope of the metal forming 2 in step b is equal to or less than the length at ground connection position 1, the distance between the outer corresponding cable sheath 3 of the two ends of the metal forming 2 after parcel and its equates; Adhesive tape 4 in step c comprises waterproof insulation tape 42 and the elasticity adhesive tape 41 that blocks water, the winding scope of waterproof insulation tape 42 is extended down on cable sheath 3 from metal forming 2, elasticity block water adhesive tape 41 winding scope from be wound around waterproof insulation tape 42 outside be extended down on cable sheath 3; The elasticity that two outer ends of the guard shield 5 in steps d are separately positioned on outside outer end, 1 liang, ground connection position blocks water on adhesive tape 41, guard shield 5 be wound around after elasticity adhesive tape 41 tight fit connections that block water, as shown in figure 15; Its three, the parcel scope of the metal forming 2 in step b is equal to or less than the length at ground connection position 1, the distance between the outer corresponding cable sheath 3 of the two ends of the metal forming 2 after parcel and its equates; Adhesive tape 4 in step c is the single-coated foam 43 of waterproof, insulation, and the winding scope of single-coated foam 43 is extended down on cable sheath 3 from metal forming 2; Two outer ends of the guard shield 5 in steps d are separately positioned on the single-coated foam 43 outside outer end, 1 liang, ground connection position, the sealing gasket tight fit that single-coated foam and guard shield corresponding site inner side are provided with.
In preferred steps a, the method to set up at ground connection position 1 is: ground connection position 1 is positioned with ground connection scale 12, ground connection scale 12 comprises length scale 121 and is arranged on the diameter scale 122 at length scale two ends, the inner surface of diameter scale 122 is globoidal structure, cambered surface size is less than or equal to semicircle cambered surface, two diameter scale 122 is coaxial and cambered surface opening direction is consistent, diameter scale 122 is its inner side near a side of length scale 121, a relative side is its outside: ground connection scale 12 is connected on the relevant position that cable need arrange ground connection position 1, mark in inner side along diameter scale 122, part between two marks, be the position that arranges at ground connection position 1, remove ground connection scale 12, the cable sheath 3 at position place is set with electrician's knife strip off ground connection position, expose Naked line, Naked line position is ground connection position 1, the outer ledge of the adhesive tape 4 after being wound around in step c is no more than the outer ledge of diameter scale 122, and it is wound around thickness and measures according to diameter scale 122.
Preferably the ground connection position 1 of adjacent wires is along the cable 145-150mm that axially staggers, and guard shield 5 is apart from the center line 500-600mm of street code 18.
Preferably the method for the anti-down power supply of electrical network also comprises step e: the default ground structure on ground, and earth connection 6 one end are connected with metal forming 2, and the other end is connected with ground structure.
Preferably ground structure comprises ground outlet 8 and earth polar 9, and ground outlet 8 one end are connected with earth point 7, and the other end is connected with earth polar 9, and metal forming 2 is connected with earth point 7 by earth connection 6.
Preferably earth polar 9 comprises horizontal earth polar 91 and vertical earth polar 92, ground outlet 8 is connected with horizontal earth polar 91,92 one end, vertical earth polar are connected with horizontal earth polar 91, when using, squeezes in soil the other end, ground outlet 8 is zinc-coated flat steel sheet, earth point 7 is formed by ground outlet 8 bendings, and two outer ends of the earth point 7 of ground outlet 8 are fixed on body of wall 15 by setscrew 10.
Preferred levels earth polar 91 is zinc-plated round iron, and ground outlet 8 is seamless welding with the connected mode in horizontal earth polar 91; Vertical earth polar 92 is Zinc-coated angle steel, and the connected mode in itself and horizontal earth polar 91 is seamless welding.
Preferably ground outlet 8 connects round iron 11 seamless weldings with horizontal earth polar 91 by refuting, lower end, the horizontal earth polar 91 of ground outlet 8 are arranged on while use with vertical earth polar 92 in a groove 17 that is arranged at ground 16, in groove, backfill completely has the soil layer of the lower end, horizontal earth polar 91 and the compaction in layers in vertical earth polar 92 that cover ground outlet 8, the lift height of soil layer is less than or equal to 200mm, and after compacting, soil layer compacting coefficient is more than or equal to 0.94.
The system of the anti-down power supply of electrical network, it comprises anti-down electric supply installation, anti-down electric supply installation comprises open-close type guard shield 5, adhesive tape 4 and metal forming 2, metal forming 2 is wrapped in the interconnection switch both sides in insulated over-head line while use, the top of power network line strain section and terminal, ground connection position 1 periphery arranging on the circuit near breakout place and the anti-power transmission of possibility of branched line, adhesive tape 4 is wrapped in the two ends of metal forming 2 while use, guard shield 5 is arranged on ground connection position 1 periphery while use, cover the metal forming 2 after parcel completely simultaneously, adhesive tape 4 after winding, one section of cable sheath outside termination and 1 outer end, ground connection position of 4 while of adhesive tape covering metal paper tinsel 2, wherein the preferred arrangement of metal forming, adhesive tape, guard shield, ground structure and earth connection is as described in said method.
When anti-down electric supply installation is set, making wire stripping mark apart from the center line 500-600mm place of carrying cable Xian street code, with ground connection position, ground connection scale location, expose the core of the inside with the insulating sleeve of electrician's knife strip off cable, strip off length is less than the length of guard shield, the core place that Naked reveals is ground connection position, at center, ground connection position coated metal paper tinsel, outer surface at the two ends of metal forming is wound around adhesive tape, the winding scope of adhesive tape is from metal forming, extend on its outer cable insulating sleeve, the two ends of guard shield are arranged on ground connection position, its coverage is extended to the outer end of the adhesive tape after winding, covering metal paper tinsel completely when guard shield is closed, while opening, expose metal forming, earth connection one end is connected in metal forming, the other end is connected on the earth point pre-setting, can use the guard shield of same length, the length at the ground connection position of multi-cable line is also identical, and the relative position that guard shield arranges on ground connection position is identical, the Naked line position of the adjacent cable line 145-150mm that staggers.
The structure of guard shield can be with reference to this application people's earlier application.
  

Claims (23)

1. the method for the anti-down power supply of electrical network, it is characterized in that: the method is included on electrical network default aerial anti-down electric supply installation, and the setting of aerial anti-down electric supply installation comprises the following steps: the top of a, interconnection switch both sides in insulated over-head line, power network line strain section and terminal, branched line near breakout place and may the circuit of anti-power transmission on the ground connection position (1) of Naked line is set; B, at each ground connection position (1) periphery coated metal paper tinsel (2); Between cable sheath (3) outside two ends and (1) two outer end, ground connection position of c, metal forming (2) after parcel, be wound around adhesive tape (4), adhesive tape (4) is one section of cable sheath outside termination and the outer end, ground connection position (1) of covering metal paper tinsel (2) simultaneously; D, the guard shield (5) of insulation, waterproof is set in ground connection position (1) periphery, guard shield (5) covers metal forming (2) after parcel completely, adhesive tape (4) after being wound around.
2. the method for the anti-down power supply of electrical network according to claim 1, it is characterized in that: described guard shield (5) is opposite guard shield or plug-type guard shield, opening protection function shell (5) corresponding site when anti-down power supply, expose described metal forming (2), at the upper earth connection (6) that connects of metal forming (2), one end of earth connection (6) is connected with the metal forming (2) after parcel, other end ground connection, for earth terminal, when normal power supply, close guard shield (5) with waterproof.
3. the method for the anti-down power supply of electrical network according to claim 2, it is characterized in that: the parcel scope of the metal forming (2) in described step b is greater than the length of ground connection position (1), outside the two ends of metal forming (2), be extended down on the cable sheath (3) outside (1) two outer end, grounding parts position; Adhesive tape (4) in described step c is the elasticity adhesive tape (41) that blocks water, and its winding scope is extended down on cable sheath (3) from metal forming (2); It is upper that two outer ends of the guard shield (5) in described steps d are separately positioned on elasticity outside (1) two outer end, the ground connection position adhesive tape (41) that blocks water, guard shield (5) be wound around after elasticity adhesive tape (41) tight fit connection that blocks water.
4. the method for the anti-down power supply of electrical network according to claim 2, it is characterized in that: the parcel scope of the metal forming (2) in described step b is equal to or less than the length of ground connection position (1), the distance between the two ends of the metal forming (2) after parcel and its outer corresponding cable sheath (3) equates; Adhesive tape (4) in described step c comprises waterproof insulation tape (42) and the elasticity adhesive tape (41) that blocks water, it is upper that the winding scope of waterproof insulation tape (42) is extended down to cable sheath (3) from metal forming (2), and elasticity blocks water outside the winding scope of adhesive tape (41) waterproof insulation tape (42) from being wound around and is extended down on cable sheath (3); It is upper that two outer ends of the guard shield (5) in described steps d are separately positioned on elasticity outside (1) two outer end, the ground connection position adhesive tape (41) that blocks water, guard shield (5) be wound around after elasticity adhesive tape (41) tight fit connection that blocks water.
5. the method for the anti-down power supply of electrical network according to claim 2, it is characterized in that: the parcel scope of the metal forming (2) in described step b is equal to or less than the length of ground connection position (1), the distance between the two ends of the metal forming (2) after parcel and its outer corresponding cable sheath (3) equates; Adhesive tape (4) in described step c is the single-coated foam (43) of waterproof, insulation, and the winding scope of single-coated foam (43) is extended down on cable sheath (3) from metal forming (2); Two outer ends of the guard shield (5) in described steps d are separately positioned on the single-coated foam (43) outside (1) two outer end, ground connection position, the sealing gasket tight fit that single-coated foam and guard shield corresponding site inner side are provided with.
6. according to the method for the anti-down power supply of electrical network described in arbitrary claim in claim 1 to 5, it is characterized in that: in described step a, the method to set up of ground connection position (1) is: ground connection position (1) is positioned with ground connection scale (12), ground connection scale (12) comprises length scale (121) and is arranged on the diameter scale (122) at length scale two ends, the inner surface of diameter scale (122) is globoidal structure, cambered surface size is less than or equal to semicircle cambered surface, two diameter scales (122) are coaxial and cambered surface opening direction is consistent, diameter scale (122) is its inner side near a side of length scale (121), a relative side is its outside: ground connection scale (12) is connected on the relevant position that cable need arrange ground connection position (1), mark in inner side along diameter scale (122), part between two marks, be the position that arranges at ground connection position (1), remove ground connection scale (12), the cable sheath (3) at position place is set with electrician's knife strip off ground connection position, expose Naked line, Naked line position is ground connection position (1), the outer ledge of the adhesive tape (4) after being wound around in described step c is no more than the outer ledge of diameter scale (122), and it is wound around thickness and measures according to diameter scale (122).
7. according to the method for the anti-down power supply of electrical network described in arbitrary claim in claim 1 to 5, it is characterized in that: axially stagger along cable in the ground connection position (1) of described adjacent wires.
8. the method for the anti-down power supply of electrical network according to claim 6, is characterized in that: axially stagger along cable in the ground connection position (1) of described adjacent wires.
9. the method for the anti-down power supply of electrical network according to claim 7, it is characterized in that: the ground connection position (1) of described adjacent wires is along the cable 145-150mm that axially staggers, described guard shield (5) is apart from the center line 500-600mm of aerial cable line (13) Yong street code (18) that supports fixed insulation overhead transmission line.
10. according to the method for the anti-down power supply of electrical network described in arbitrary claim in claim 2 to 5, it is characterized in that: the method for the described anti-down power supply of electrical network also comprises step e: the default ground structure on ground, described earth connection (6) one end is connected with metal forming (2), and the other end is connected with ground structure.
The method of the anti-down power supply of 11. electrical network according to claim 8, it is characterized in that: the method for the described anti-down power supply of electrical network also comprises step e: the default ground structure on ground, described earth connection (6) one end is connected with metal forming (2), and the other end is connected with ground structure.
The method of the anti-down power supply of 12. electrical network according to claim 10, it is characterized in that: described ground structure comprises ground outlet (8) and earth polar (9), ground outlet (8) one end is connected with earth point (7), the other end connects earth polar (9), and described metal forming (2) is connected with earth point (7) by earth connection (6).
The method of the anti-down power supply of 13. electrical network according to claim 12, it is characterized in that: described earth polar (9) comprise horizontal earth polar (91) and vertical earth polar (92), described ground outlet (8) is connected with horizontal earth polar (91), one end, vertical earth polar (92) is connected with horizontal earth polar (91), when using, squeezes in soil the other end, ground outlet (8) is zinc-coated flat steel sheet, described earth point (7) is formed by ground outlet (8) bending, two outer ends of the earth point (7) of ground outlet (8) are fixed on body of wall (15) by setscrew (10).
The method of the anti-down power supply of 14. electrical network according to claim 13, is characterized in that: described horizontal earth polar (91) is zinc-plated round iron, and described ground outlet (8) is seamless welding with the connected mode in horizontal earth polar (91); Described vertical earth polar (92) is Zinc-coated angle steel, and the connected mode of itself and horizontal earth polar (91) is seamless welding.
The method of the anti-down power supply of 15. electrical network according to claim 14, it is characterized in that: described ground outlet (8) connects round iron (11) seamless welding with described horizontal earth polar (91) by refuting, the lower end of ground outlet (8), horizontal earth polar (91) is arranged in a groove (17) that is arranged at ground (16) while use with described vertical earth polar (92), in groove, backfill completely has the lower end of covering ground outlet (8), the soil layer of horizontal earth polar (91) and the compaction in layers of vertical earth polar (92), the lift height of soil layer is less than or equal to 200mm, after compacting, soil layer compacting coefficient is more than or equal to 0.94.
The system of the anti-down power supply of 16. electrical network, it is characterized in that: the system of the anti-down power supply of described electrical network comprises anti-down electric supply installation, anti-down electric supply installation comprises open-close type guard shield (5), adhesive tape (4) and metal forming (2), metal forming (2) is wrapped in the interconnection switch both sides in insulated over-head line while use, the top of power network line strain section and terminal, ground connection position (1) periphery arranging on the circuit near breakout place and the anti-power transmission of possibility of branched line, adhesive tape (4) is wrapped in the two ends of metal forming (2) while use, one section of cable sheath outside termination and the outer end, ground connection position (1) of adhesive tape (4) while covering metal paper tinsel (2), guard shield (5) is arranged on ground connection position (1) periphery while use, cover the metal forming (2) after parcel completely simultaneously, adhesive tape (4) after winding.
The system of the anti-down power supply of 17. electrical network according to claim 16, it is characterized in that: the parcel scope of described metal forming (2) is greater than the length of ground connection position (1), outside the two ends of metal forming (2), be extended down on the cable sheath (3) outside (1) two outer end, grounding parts position; Described adhesive tape (4) is the elasticity adhesive tape (41) that blocks water, and its winding scope is extended down on cable sheath (3) from metal forming (2); It is upper that two outer ends of described guard shield (5) are separately positioned on elasticity outside (1) two outer end, the ground connection position adhesive tape (41) that blocks water, guard shield (5) be wound around after elasticity adhesive tape (41) tight fit connection that blocks water.
The system of the anti-down power supply of 18. electrical network according to claim 16, it is characterized in that: the parcel scope of described metal forming (2) is equal to or less than the length of ground connection position (1), the distance between the two ends of the metal forming (2) after parcel and its outer corresponding cable sheath (3) equates; Described adhesive tape (4) comprises waterproof insulation tape (42) and the elasticity adhesive tape (41) that blocks water, it is upper that the winding scope of waterproof insulation tape (42) is extended down to cable sheath (3) from metal forming (2), and elasticity blocks water outside the winding scope of adhesive tape (41) waterproof insulation tape (42) from being wound around and is extended down on cable sheath (3); It is upper that two outer ends of described guard shield (5) are separately positioned on elasticity outside (1) two outer end, the ground connection position adhesive tape (41) that blocks water, guard shield (5) be wound around after elasticity adhesive tape (41) tight fit connection that blocks water.
The system of the anti-down power supply of 19. electrical network according to claim 16, it is characterized in that: the parcel scope of described metal forming (2) is equal to or less than the length of ground connection position (1), the distance between the two ends of the metal forming (2) after parcel and its outer corresponding cable sheath (3) equates; Described adhesive tape (4) is the single-coated foam (43) of waterproof, insulation, and the winding scope of single-coated foam (43) is extended down on cable sheath (3) from metal forming (2); Two outer ends of described guard shield (5) are separately positioned on the single-coated foam (43) outside (1) two outer end, ground connection position.
20. systems according to claim 16 to the anti-down power supply of electrical network described in arbitrary claim in 19, it is characterized in that: described ground connection position (1) is arranged on adjacent cable line along the cable 145-150mm that axially staggers, described guard shield (5) is arranged on while use apart from supporting on the aerial cable line (13) at center line 500-600mm place of aerial cable line (13) Yong street code (18) of fixed insulation overhead transmission line.
21. systems according to claim 16 to the anti-down power supply of electrical network described in arbitrary claim in 19, it is characterized in that: when the anti-down power supply of described anti-down electric supply installation, be connected with an earth connection (6) by described metal forming, one end of earth connection (6) ground connection is its earth terminal, the system of the anti-down power supply of described electrical network also comprises ground structure, ground structure comprises earth point (7), ground outlet (8) and earth polar (9), ground outlet (8) one end is connected with earth point (7), its other end is connected with earth polar (9), the earth terminal of earth connection (6) is connected with earth point (7).
The system of the anti-down power supply of 22. electrical network according to claim 21, it is characterized in that: described earth polar (9) comprise horizontal earth polar (91) and vertical earth polar (92), described ground outlet (8) is connected with horizontal earth polar (91), one end, vertical earth polar (92) is connected with horizontal earth polar (91), when using, squeezes in soil the other end, ground outlet (8) is zinc-coated flat steel sheet, described earth point (7) is formed by ground outlet (8) bending, two outer ends of the earth point (7) of ground outlet (8) are fixed on body of wall (15) by setscrew (10) while use.
The system of the anti-down power supply of 23. electrical network according to claim 22, it is characterized in that: described horizontal earth polar (91) is zinc-plated round iron, described ground outlet (8) connects round iron (11) seamless welding with horizontal earth polar (91) by refuting, described vertical earth polar (92) is Zinc-coated angle steel, the connected mode of itself and horizontal earth polar (91) is seamless welding, the lower end of ground outlet (8), horizontal earth polar (91) is arranged in a groove (17) that is arranged at ground (16) while use with vertical earth polar (92), in groove, backfill completely has the lower end of covering ground outlet (8), the soil layer of horizontal earth polar (91) and the compaction in layers of vertical earth polar (92), the lift height of soil layer is less than or equal to 200mm.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2033956U (en) * 1988-01-12 1989-03-08 湖南省长沙电业局长沙发电厂 Apparatus for the prevention of back-flow current from network to electric power generating set
JP2006352964A (en) * 2005-06-14 2006-12-28 Nissan Motor Co Ltd Relay device and method of preventing operation at reverse connection of its power source
CN201118276Y (en) * 2007-08-15 2008-09-17 孙志明 Earth leakage circuit-breaker inverse transmission preventing device
CN202111347U (en) * 2011-05-16 2012-01-11 辽宁省电力有限公司辽阳供电公司 10 kV junction box grounding wire
CN103117480A (en) * 2013-01-31 2013-05-22 广州番禺电缆集团有限公司 Combined set and method for waterproof and moisture-proof handling of bare cable connections
CN203787850U (en) * 2014-01-23 2014-08-20 广州番禺电缆集团有限公司 Anti-reverse power supply system of power grid

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2033956U (en) * 1988-01-12 1989-03-08 湖南省长沙电业局长沙发电厂 Apparatus for the prevention of back-flow current from network to electric power generating set
JP2006352964A (en) * 2005-06-14 2006-12-28 Nissan Motor Co Ltd Relay device and method of preventing operation at reverse connection of its power source
CN201118276Y (en) * 2007-08-15 2008-09-17 孙志明 Earth leakage circuit-breaker inverse transmission preventing device
CN202111347U (en) * 2011-05-16 2012-01-11 辽宁省电力有限公司辽阳供电公司 10 kV junction box grounding wire
CN103117480A (en) * 2013-01-31 2013-05-22 广州番禺电缆集团有限公司 Combined set and method for waterproof and moisture-proof handling of bare cable connections
CN203787850U (en) * 2014-01-23 2014-08-20 广州番禺电缆集团有限公司 Anti-reverse power supply system of power grid

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