CN104200897A

CN104200897A - Power line with ice and snow preventing function

Info

Publication number: CN104200897A
Application number: CN201410488743.8A
Authority: CN
Inventors: 马根昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-09-23
Filing date: 2014-09-23
Publication date: 2014-12-10

Abstract

The invention provides a power line with an ice and snow preventing function. The power line comprises a metal wire which is stranded to form a wire base and an electric heating wire. The electric heating wire winds the wire base or the electric heating wire and the metal wire are jointly stranded to form the wire base. An insulation layer is disposed outside the electric heating wire. Two electric heating wire bodies which are insulated to each other are disposed inside the electric heating wire. At two ends of each section of the wire base, the two electric heating wire bodies in the electric heating wire are respectively electrically connected to power supplies, and the two power supplies at two ends of the electric heating wire and the two electric heating wire bodies in the electric heating wire form a serial connection loop. Each power supply comprises a heat relay, the heat relay keeps the serial connection loop disconnected when environment temperature is higher than preset temperature, or else, the heat relay keeps serial connection loop connected. The power line with the ice and snow preventing function can melt ice and snow accumulated on the surface of the power line, and power line breakage is avoided.

Description

Anti-ice-and-snow power line

Technical field

The present invention relates to electric power facility field, especially, relate to a kind of high-altitude power line.

Background technology

High-altitude power line is to realize the basic electric power facility that remote power is carried; In transmission of electricity process, need to stand the weather test in district variously, as, the mountain area that some are cold, the residing high-altitude of power transmission line has extremely cold temperature, and often meet with rainwater weather, now, power transmission line surface is very easy to accumulated snow and freezes, and causes power transmission line weight to be increased sharply, blow through wind one, power transmission line very likely ruptures and drops again.Current high-altitude power line is formed by wire strand system, is substantially all faced with this problem, causes very large trouble to power construction department.

Summary of the invention

For the problems referred to above, the object of the present invention is to provide a kind of Anti-ice-and-snow power line, this Anti-ice-and-snow power line can, under the situation of power transmission line surface accumulated snow or accumulated ice, make melting of ice and snow, thereby avoids the problem of power transmission line fracture.

The technical solution adopted for the present invention to solve the technical problems is: this Anti-ice-and-snow power line comprises that strand system forms the metal wire of electric wire matrix; Also include around the home on described electric wire matrix, or be together stranding into the heating wire of described electric wire matrix with described metal wire; Described heating wire outside has insulating barrier, and heating wire inside comprises the heating wire of two mutually insulateds; At the two ends of each section of described electric wire matrix, respectively two heating wire in described heating wire are electrically connected to a power supply, make two heating wire in two power supplys and the heating wire at heating wire two ends form a series loop; In described power supply, include thermal relay, this thermal relay remains open described series loop in ambient temperature during higher than predetermined temperature, otherwise makes this series loop keep connecting.

As preferably, described power supply comprises that one is nested with magnetic guiding loop on described electric wire matrix and the coil on this magnetic guiding loop around the home; Two outputs of described coil are electrically connected two heating wire the described heating wire of drawing from one end of one section of electric wire matrix by described thermal relay.

As preferably, described magnetic guiding loop forms by silicon steel ring plate is stacking, possesses good magnetic property, and has limited the generation of vortex flow.Further, the silicon steel ring plate in described magnetic guiding loop has radial gap; The radial gap of each adjacent silicon steel ring plate staggers mutually.

As preferably, described Anti-ice-and-snow power line also comprises around the home on described electric wire matrix, or is together stranding into the humidity inductive line of described electric wire matrix with described metal wire; Thermal relay in described humidity inductive line and described power supply carries out break-make control to described series loop after by an AND circuit, when the humidity on described humidity inductive line is greater than set point, and the ambient temperature that described thermal relay senses is during lower than predetermined temperature, make described series loop keep connecting, otherwise described series loop is remained open.

Beneficial effect of the present invention is: this Anti-ice-and-snow power line is operated in normal temperature condition lower time, the series loop that power supply-heating wire is formed due to the thermal relay in described power supply remains open, therefore, the heating wire in described heating wire does not generate heat, and power line is normally worked; When ambient temperature is during lower than predetermined temperature, described series loop keeps connecting, now, described power supply is to this series loop power supply, make electrothermal wire heating, now, that form, that cover on electric wire matrix at low temperatures ice and snow melts the heat being produced by heating wire, make cannot form all the time on electric wire matrix thick and heavy accumulated ice accumulated snow, thereby prevent its fracture.

Brief description of the drawings

Fig. 1 is an embodiment schematic diagram of this Anti-ice-and-snow power line.

Fig. 2 is in Fig. 1 embodiment, the structural representation of power supply.

Fig. 3 is in Fig. 2, the forward view of the magnetic guiding loop in power supply.

Fig. 4 is in Fig. 2, the side direction view of the magnetic guiding loop in power supply.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further described:

In the embodiment shown in fig. 1, this Anti-ice-and-snow power line comprises that strand system forms the metal wire of electric wire matrix 1; Also include the heating wire 12 on described electric wire matrix 1 around the home; Described heating wire 12 outsides have insulating barrier, and heating wire inside comprises the heating wire of two mutually insulateds; At the two ends of each section of described electric wire matrix 1, that is to say the two ends of the one section of electric wire matrix setting up between adjacent electric power frame; Respectively two heating wire in described heating wire 12 are electrically connected to a power supply 3,3 ', make heating wire 12 two ends two power supplys 3,3 ' and heating wire 12 in two heating wire form a series loop.

The structural representation of described power supply 3 as shown in Figure 2, comprises that one is nested with magnetic guiding loop 31 on described electric wire matrix 1 and the coil 32 on this magnetic guiding loop around the home; Two outputs 341,342 of described coil 32 ' are electrically connected two heating wire the described heating wire 12 of drawing from one end of one section of electric wire matrix 1 afterwards by thermal relay 33,33.

Described thermal relay 33,33 ' remains open described series loop in ambient temperature during higher than predetermined temperature, otherwise makes this series loop keep connecting; For thermal relay, belong to general part, the kind having is at present more, can consider to adopt the thermal relay of bimetal leaf form, and its concrete structure and realization of the present invention are irrelevant, therefore repeat no more.Described predetermined temperature, generally can get-5 DEG C of left and right; Generally, high altitude environment temperature during lower than-5 DEG C, forms the chance of ice and snow in the air with regard to showed increased.

Except the present embodiment, can also be on described electric wire matrix 1 humidity inductive line around the home; Thermal relay in described humidity inductive line and described power supply 3 carries out break-make control to described series loop after by an AND circuit; As, humidity inductive line is coupled to moisture analyzer; When the humidity of moisture analyzer on humidity inductive line is greater than set point, to a high level of described AND circuit output, otherwise a low level of output; And now, described thermal relay adopts electronic relay, when its ambient temperature sensing is during lower than predetermined temperature, to a high level of described AND circuit output, otherwise a low level of output; Described AND circuit, in the time that control end is high level, makes described series loop keep connecting, otherwise described series loop is remained open.

For the operation principle of described power supply 3, as shown in Figure 2, owing to being connected with alternating current in electric wire matrix 1, therefore, will in described magnetic guiding loop 31, producing annular alternating magnetic field, thereby generate electromotive force in coil 32, be described series loop power supply.

For an embodiment of described magnetic guiding loop 31, as shown in Figure 3, Figure 4, described magnetic guiding loop 31 forms by silicon steel ring plate 311 is stacking, possesses good magnetic property, and has limited the generation of vortex flow.

And in the present embodiment, the silicon steel ring plate 311 in described magnetic guiding loop has radial gap 310; Consider and should make each silicon steel ring plate form constitutionally stable magnetic guiding loop, offer again described gap 310, in the present embodiment, staggered mutually in the gap of each silicon steel ring plate 311 310, then each silicon steel ring plate is bonded together mutually, like this, gap in each silicon steel ring plate will be overlapped by adjacent silicon steel ring plate, forms rock-steady structure.Offering of described gap 310, the outstanding effect having for the present invention is, in the time that temperature is higher, due to the effect of expanding with heat and contract with cold of metal, gap 310 is larger, cause each annular silicon steel ring plate cannot form continuous loop checking installation, like this, the inductance that whole magnetic guiding loop 31 and coil 32 form is just very small, almost negligible, therefore, the induced electromotive force in coil 32 is very faint, can not have any impact to the electric current in electric wire matrix; And temperature is lower, described gap 310 is less, arrives time below freezing, gap 310 is extruded very smallly, this makes each silicon steel ring plate 311 form complete magnetic conduction loop, thereby significantly improves the induced electromotive force in described coil 32, to power for described heating wire 12.

Above-mentioned Anti-ice-and-snow power line is operated in normal temperature condition lower time, and due to the thermal relay 33,33 in described power supply 3, ' series loop that power supply-heating wire is formed remains open, and therefore, the heating wire in described heating wire 12 does not generate heat, and power line is normally worked; When ambient temperature is during lower than predetermined temperature, described series loop keeps connecting, now, described power supply 3,3 ' is to this series loop power supply, make electrothermal wire heating, now, that form, that cover on electric wire matrix 1 at low temperatures ice and snow melts the heat being produced by heating wire, make cannot form all the time on electric wire matrix thick and heavy accumulated ice accumulated snow, thereby prevent its fracture.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

1. an Anti-ice-and-snow power line, comprises that strand system forms the metal wire of electric wire matrix (1); It is characterized in that: also include around the home at described electric wire matrix (1) above, or be together stranding into the heating wire (12) of described electric wire matrix (1) with described metal wire; Described heating wire outside has insulating barrier, and heating wire (12) inside comprises the heating wire of two mutually insulateds; At the two ends of each section of described electric wire matrix (1), (3,3 '), makes two heating wire in two power supplys and the heating wire at heating wire two ends form a series loop respectively two heating wire in described heating wire (12) to be electrically connected to a power supply; Described power supply includes thermal relay in (3,3 '), and this thermal relay remains open described series loop in ambient temperature during higher than predetermined temperature, otherwise makes this series loop keep connecting.

2. Anti-ice-and-snow power line according to claim 1, is characterized in that: described power supply (3) comprises that one is nested with magnetic guiding loop (31) on described electric wire matrix (1) and the coil on this magnetic guiding loop (32) around the home; By described thermal relay, (33,33 ') is electrically connected two heating wire the described heating wire (12) of drawing from one end of one section of electric wire matrix (1) to two outputs (341,342) of described coil (32).

3. Anti-ice-and-snow power line according to claim 2, is characterized in that: described magnetic guiding loop (31) is by stacking the forming of silicon steel ring plate (311).

4. Anti-ice-and-snow power line according to claim 3, is characterized in that: the silicon steel ring plate (311) in described magnetic guiding loop (31) has radial gap (310).

5. Anti-ice-and-snow power line according to claim 4, is characterized in that: the radial gap (310) of each adjacent described silicon steel ring plate (311) staggers mutually.

6. according to the Anti-ice-and-snow power line described in claim 1～5 any, it is characterized in that: described Anti-ice-and-snow power line also comprises around the home at described electric wire matrix (1) upper, or be together stranding into the humidity inductive line of described electric wire matrix (1) with described metal wire; Thermal relay in described humidity inductive line and described power supply carries out break-make control to described series loop after by an AND circuit, when the humidity on described humidity inductive line is greater than set point, and the ambient temperature that described thermal relay senses is during lower than predetermined temperature, make described series loop keep connecting, otherwise described series loop is remained open.