CN113507082B - Single-phase passive anti-icing and de-icing resistance type control equipment for strain tower - Google Patents
Single-phase passive anti-icing and de-icing resistance type control equipment for strain tower Download PDFInfo
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- CN113507082B CN113507082B CN202110797159.0A CN202110797159A CN113507082B CN 113507082 B CN113507082 B CN 113507082B CN 202110797159 A CN202110797159 A CN 202110797159A CN 113507082 B CN113507082 B CN 113507082B
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- 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
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
Abstract
A single-phase passive anti-icing ice-melt resistance type controlgear for strain insulator tower. The device consists of a voltage division module, a shunt module and a temperature control module. The number of the external connecting joints is four, and the external connecting joints are respectively an output joint, an input aluminum wire joint, an input steel core joint and a ground wire joint. The voltage division module is formed by connecting a voltage division resistor and a voltage division capacitor in parallel. The shunt module comprises a shunt module formed by a bifilar shunt transformer and a shunt module formed by an autotransformer. The temperature control module is composed of a temperature sensing module, a sensing resistor module, a protection resistor, a starting switch A and a starting switch B. When the grounding switch is used, the control equipment is connected with the wire and is connected with the grounding switch through the external connection joint of the control equipment. And when ice melting is needed, the ground wire switch is closed, and when ice melting is not needed, the ground wire switch is opened. The control equipment is light in weight and can be directly used on a stock power transmission line. The transmission line automatically realizes passive temperature adjustment. The manufacturing cost is low. Simple structure and high reliability in the using process.
Description
One, the technical field
The invention relates to a strain tower of an electric power transmission line, in particular to an anti-icing and de-icing control device for the strain tower.
Second, background Art
In the power transmission line, the vertical load of the tension tower determines the service safety and the service life of the power line. In cold winter, the ice prevention and melting of the tension tower are particularly important.
Patent numbers: ZL201811489790.9 No-loss single-phase shunt among lines and design and control method thereof provides a design and control method of the No-loss single-phase shunt among lines. By calculating the turn ratio of the transformer coil, the conductor current just meets the requirement of anti-icing and de-icing under the control of the microprocessor on the change-over switch, the current is accurately controlled, and the anti-icing and de-icing are accurately controlled. The shunt can work in a normal power transmission mode and an anti-icing and de-icing mode, and is simple and reliable to operate.
The problem that power is difficult to get by intelligent ice melting equipment in the using process is solved by the aid of the passive intelligent ice melting control equipment in patent number 201921929880.5, ice melting of the power transmission conductor is automatically started by changing the change of the resistance through sensing the temperature change of the main body, ice melting is automatically stopped after the ice melting is sensed, and the temperature of the power transmission conductor is kept in a proper range.
The above prior arts all have the following problems:
1. the on-load tap-changer has a complex structure, high price and inconvenient control, and is inconvenient for the use of the strain tower;
2. the voltage borne by the voltage-dividing transformer is too high, so that the manufacturing cost is high;
3. the whole weight is heavier, the requirement on the mechanical property of the installed tension tower is high, and some tension towers need to be reinforced for the stock power transmission line.
Third, the invention
The invention aims to provide anti-icing and de-icing resistance type control equipment specially used for a strain tower. The equipment can be directly used for the stock power transmission line and the strain tower without reinforcement.
The purpose of the invention is achieved by the following steps:
the utility model provides a single-phase passive anti-icing ice-melt resistance type controlgear for strain insulator tower which characterized in that: the control equipment consists of a voltage division module, a shunt module and a temperature control module; the number of the external connecting joints is four, and the external connecting joints are respectively an output joint, an input aluminum wire joint, an input steel core joint and a ground wire joint.
The voltage division module has two interfaces: the ground wire side interface is in short-circuit connection with the ground wire joint, and the lead side interface is in short-circuit connection with the leakage current interface of the shunt module.
The shunting module has three interfaces: leakage current interface, output side interface, control by temperature change side interface. The leakage current interface is in short circuit connection with a wire side interface of the voltage division module; the output side interface is in short circuit connection with the output connector; the temperature control side interface is in short circuit connection with the shunt side interface of the temperature control module.
The temperature control module has four interfaces: a shunt side interface, a steel core side interface, a voltage-sharing interface and an aluminum wire side interface. The shunt side interface is in short circuit connection with the temperature control side interface of the shunt module; the steel core side interface is in short circuit connection with the input steel core joint; the voltage-sharing interface is in short-circuit connection with the output connector; the aluminum wire side interface is in short circuit connection with the input aluminum wire joint.
The shunting module has two kinds: the shunt module comprises a shunt module formed by a bifilar winding shunt transformer and a shunt module formed by an auto-coupling shunt transformer.
The double-winding shunt transformer is a transformer structure with two windings, namely a shunt low-voltage winding and a shunt high-voltage winding, and the head ends of the low-voltage winding and the high-voltage winding are homonymous ends; the number of turns of the shunt low-voltage winding coil is less than that of the shunt high-voltage winding coil; when the double-winding shunt transformer is adopted, the leakage current interface is a double-winding leakage current interface; the output side interface is a double-winding output side interface; the temperature control side interface is a duplex winding temperature control side interface.
The auto-coupling shunt transformer adopts an auto-coupling boosting transformer structure, and only one transformer winding is called as an auto-coupling shunt winding; the head end of the shunt high voltage is the head end of the self-coupling shunt winding, and the shunt neutral point is the tail end of the self-coupling shunt winding; when the autotransformer is adopted, the leakage current interface is an autotransformer leakage current interface; the output side interface is a self-coupling output side interface; the temperature control side interface is a self-coupling temperature control side interface.
The voltage division module is formed by connecting a voltage division resistor and a voltage division capacitor in parallel. After the divider resistor and the divider capacitor are connected in parallel, one end of the divider resistor is connected with the ground wire side interface, and the other end of the divider resistor is connected with the lead wire side interface. The temperature control module is composed of a temperature sensing module, a sensing resistor, a protection resistor, a starting switch A and a starting switch B. One end of the protection resistor is in short-circuit connection with the voltage-sharing interface, and the other end of the protection resistor is in short-circuit connection with the aluminum wire side interface; one end of the starting switch A is in short-circuit connection with the voltage-sharing interface, and the other end of the starting switch A is in short-circuit connection with the aluminum wire side interface; one end of the starting switch B is in short-circuit connection with the steel core side interface, and the other end of the starting switch B is in short-circuit connection with the aluminum wire side interface. When ice melting is needed, the starting switch A and the starting switch B are disconnected, and the two ends of the switch A and the starting switch B are opened; when ice melting is not needed, the starting switch A and the starting switch B are closed, and two ends of the switch A and the starting switch B are short-circuited.
The temperature sensing module consists of a temperature sensing shell, a temperature sensing right side seal, a temperature sensing steel core, a temperature sensing slide bar seat, a slide bar guide pipe, a slide bar and a contact brush; and a shunting side interface, a steel core side interface and an aluminum wire side interface are arranged on the temperature sensing module.
The temperature sensing shell and the temperature sensing right side seal form a sensing shell component. The temperature sensing steel core, the inner fixing point, the shunt side interface and the steel core side interface form a temperature sensing steel core assembly. The temperature sensing slide bar seat, the slide bar conduit and the embedded contact brush short-circuit line form a slide bar seat component. The sliding rod, the contact brush and the contact brush short-circuit line form a contact brush component.
The temperature sensing shell is of a tubular structure, a left thread and a right thread are arranged at two ends of the tubular structure respectively, and the left thread and the right thread are internal threads. A steel wire outlet is arranged on the side surface of the temperature sensing shell; the steel wire outlet is a round hole on the side surface of the temperature sensing shell, and the diameter of the round hole is consistent with that of the temperature sensing steel core. A steel core sealing groove is carved on the wall of the side circular hole; the steel core sealing groove is used for placing annular sealing rings, and when the outer connecting sections at the two ends of the temperature sensing steel core penetrate through the steel wire outlet, the annular sealing rings are fixed in the steel core sealing groove, so that the outer connecting sections at the two ends of the temperature sensing steel core and the steel wire outlet are kept sealed; after all the components are installed, the temperature sensing shell and the components installed at the upper side form a closed space.
The temperature sensing right side seal is provided with a right side seal thread and a right side bottom cover, and the right side bottom cover and the right side seal thread are integrated; the right sealing thread is an external thread and is tightly meshed with the right thread; the right bottom cover 403 is in a disc shape, and the diameter of the right bottom cover is larger than or equal to that of the temperature sensing shell; the temperature sensing right side seal 311 is the same as the right side thread of the temperature sensing shell in size and tightly meshed with the right side thread of the temperature sensing shell through a right side seal thread 369, and a sealing ring is added between the right side bottom cover and the right side of the temperature sensing shell; so that the temperature sensing right side seal is sealed with the temperature sensing shell.
The diameter of the temperature sensing steel core is the same as that of the used wire steel core, the middle section is a straight line, the two ends are external connecting sections, and the external connecting sections and the middle section form an angle of 90 degrees; the ends of the external connecting sections at the two ends are provided with steel core interface threads; the steel core interface thread is an external thread and is used for being twisted with the connecting threads in the shunting side interface and the steel core side interface; the temperature sensing steel core and the inner conductor steel core of the self-made heat conducting wire are made of the same material; the outer connecting sections at two ends of the temperature sensing steel core penetrate through the steel wire outlet, and the steel core interface threads at two ends are respectively occluded with the installation internal threads with the shunting side interface and the steel core side interface; the inner fixing point is a disc welded at one side of the outer connecting section close to the middle section; the radius of the disc of the inner fixed point is larger than that of the steel core, and the inner fixed point is tightly attached to the inner wall of the temperature sensing shell during installation.
The structure of the shunting side interface is the same as that of the steel core side interface. The shunt side interface and the steel core side interface are formed by welding a short circuit connecting interface and a hexagon nut, and the short circuit connecting interface and the hexagon nut are made of metal materials; the short circuit connection interface is annular; the hexagonal nut is in a regular hexagon column shape, and an internal thread is arranged in the middle of the hexagonal nut; the mounting internal thread is matched with the thread of the net core interface and is tightly meshed.
In the slide bar seat component, a temperature sensing slide bar seat comprises three parts, namely a sensing resistor connecting thread, a slide bar seat body and a sensing shell connecting thread; are all columnar. The induction resistance connecting thread, the sliding rod seat body and the induction shell connecting thread are coaxially connected into a whole, the axis is a columnar hollow body, and the diameter of the columnar hollow body is the same as the inner diameter of the sliding rod guide pipe; the connecting thread of the induction resistor is the same as the connecting thread of the induction shell in size; the diameter of the sliding rod seat body is larger than the diameter of the connecting thread of the induction shell; the connecting thread of the induction resistor and the connecting thread of the induction shell are external threads; the big diameter of the connecting thread of the induction shell is the same as that of the left thread, the connecting thread of the induction shell is precisely occluded with the left thread, and a sealing ring is added in the middle of occlusion to seal the two threads; the big diameter of the connecting thread of the induction resistor is the same as the big diameter of the right thread of the induction resistor, and is tightly meshed with the right thread of the induction resistor.
The slide bar conduit is of a tubular structure, and the inner diameter of the slide bar conduit is slightly larger than the outer diameter of the slide bar; the cavity in the middle of the slide bar conduit is the same as the axis of the columnar hollow body of the temperature sensing slide bar seat, and the inner diameter of the cavity is the same, so that the cavity and the columnar hollow body form a whole, and the whole is called as a telescopic chute; the sliding rod is arranged in the telescopic sliding chute and slides in the telescopic sliding chute; the left side of the sliding rod guide pipe is provided with a plurality of guide pipe sealing grooves, and sealing rings are added in the guide pipe sealing grooves, so that when the sliding rod moves left and right in the sliding rod guide pipe, sealing between the telescopic sliding grooves at the two ends of the sealing rings is guaranteed.
The embedded contact brush short circuit line is made of metal material; is embedded between the connecting thread of the inductive resistor and the slide bar seat body. The two ends are provided with an aluminum wire side interface and a contact brush short interface; the aluminum wire side interface is exposed out of the side surface of the slide bar seat body; the contact brush short interface is exposed out of the bottom surface of the left side of the connecting thread of the induction resistor.
The inductive resistance connecting thread, the sliding rod seat body and the inductive shell connecting thread are integrated, and the embedded contact brush short-circuit line is embedded in the middle of the inductive resistance connecting thread, the sliding rod seat body and the inductive shell connecting thread.
In the contact brush component, the sliding rod is cylindrical, the outer diameter of the sliding rod is slightly smaller than the inner diameter of a cavity in the middle of the sliding rod guide pipe, and the sliding rod penetrates through the sealing ring in the middle of the guide pipe sealing groove, so that the telescopic chute spaces on the left side and the right side of the sealing ring in the sliding rod guide pipe are kept sealed during sliding. The sliding rod is a whole; and a contact brush screw mounting hole is formed in the bottom of the left side of the sliding rod and used for being fixed with a contact brush.
The contact brush is composed of a fixed disk and a short-circuit brush. The fixed disc and the short circuit brush are made of metal materials, the fixed disc is disc-shaped, a large number of equal-length metal wires are welded on the fixed disc, the metal wires axially pass through the center of the fixed disc, and all the metal wires form a circular ring shape; a slide bar mounting hole is formed in the center of the fixed disc, and a contact brush and the slide bar are fixed into a whole through the slide bar mounting hole and a contact brush screw mounting hole by screws.
The contact brush short circuit line is made of metal material, and one end of the contact brush short circuit line is welded on the fixed disc; one end of the short circuit brush is welded at the short circuit port of the contact brush, so that the short circuit brush is in short circuit connection with the side interface of the aluminum wire; the contact brush short-circuit wire is wound on the sliding rod, so that when the sliding rod moves left and right, the contact brush short-circuit wire has a movable interval and keeps short-circuit connection between the contact brush and the aluminum wire side interface.
The induction resistance module is composed of a shell base, an induction resistance wire, an induction resistance shell and a voltage-sharing interface.
The shell of the induction resistor is of a cylindrical structure, and the left side and the right side of the shell are respectively provided with a right side thread of the induction resistor and a left side thread of the induction resistor; the right side screw thread of the induction resistor and the left side screw thread of the induction resistor are both internal threads, and the specification and the size are the same. The right side thread of the induction resistor is the same as the connecting thread of the induction resistor in size and is tightly meshed with the connecting thread of the induction resistor, and a sealing ring is added between the right side thread and the connecting thread of the induction resistor during installation; the left thread of the induction resistor is tightly meshed with the mounting thread of the base of the shell, and a sealing ring is added in the middle during mounting; the induction electric group wires are exposed and surrounded on the inner wall of the induction resistor, a certain distance is reserved between adjacent induction electric group wires, and the side surfaces of different circles of resistance wires are not connected; the left end of the induction resistance wire is in short circuit connection with the voltage-sharing interface; the short circuit brush is in short circuit connection with the induction resistance wire and is in short circuit connection with the aluminum wire side interface; when the sliding rod moves left and right, the short circuit brush is driven to move left and right; when the short circuit brush moves leftwards, the length of the resistance wire between the short circuit brush and the voltage-sharing interface is shortened, and the resistance between the voltage-sharing interface and the aluminum wire side interface 304 is reduced; when the short circuit brush moves rightwards, the length of the resistance wire between the short circuit brush and the voltage-sharing interface is extended, and the resistance between the voltage-sharing interface and the aluminum wire side interface is increased.
The base of the shell is divided into a base support body and a thread support body, and is made of engineering plastics and molded into an integral structure by adopting a molding process; the base support body and the thread support body are cylindrical and coaxial, and the diameter of the base support body is larger than that of the thread support body; the outer side of the thread supporting body is provided with a shell base mounting thread, the shell base mounting thread is an external thread, the thread is consistent with the thread on the left side of the induction resistor in large diameter, and the thread and the induction resistor are tightly meshed.
The installation mode of strain insulator tower is as follows: insulators are respectively installed on two sides of the cross arm; and a tension-resistant clamp is arranged on the other side of the insulator. Assuming that power is delivered from the right side to the left side; the outer conductor is an aluminum stranded wire, and the inner conductor is a steel core; the left and right steel cores are tightly connected to the tension-resisting clamp; the steel core on the right side is in short circuit connection with the input steel core joint; the right aluminum stranded wire is in short circuit connection with the input aluminum wire joint; after the steel core on the left side is in short circuit with the aluminum stranded wire, the steel core is in short circuit connection with the output connector; the ground wire joint is connected with the ground wire through the ground wire switch. When ice melting is needed, the ground wire switch is closed, so that the ground wire joint and the ground wire are in short circuit; when ice melting is not needed, the ground wire switch is opened, and the ground wire joint is disconnected with the ground wire.
Outer conductor external diameter D connected with single-phase passive anti-icing and de-icing resistance type control equipmentwRepresents; the length of the lead between the two tension towers is represented by L; inner conductor outer diameter DnRepresents; the thickness of the self-made thermal conductor insulation layer is denoted by dz; resistivity of inner conductor, using AnRepresents; the rated transmission current is denoted IA; the rated transmission voltage is represented by VA; setting the partial pressure coefficient of the partial pressure module as kf, wherein the value of kf is between 0.7 and 0.95; all units are metric units, length units: rice; time unit: second, mass unit: kilogram, temperature unit: kelvin;
the turn ratio of the transformer is as follows:
the shunt transformer is a double-winding shunt transformer or an autotransformer; the turn ratios of the two transformers are the same;
the shunt transformer is a step-up transformer, and the turn ratio is as follows:
maximum value of the induction resistance:
the maximum value of the induction resistor is the value when the temperature of the temperature induction steel core is the lowest;
protection resistance:
voltage-dividing resistance:
setting the divider resistance to RF
Voltage-dividing capacitance:
if the inductance of the shunt transformer is LF and the voltage dividing capacitance is CF, then:
the invention has the positive effects that:
1. the whole weight of the control equipment is light, and the strain tower on the road can be directly used without being reinforced for the stock power transmission line;
2. the automatic temperature adjustment of the power transmission line can be realized without additional control; the sensing and the control of the temperature adjusting process are both in a passive mode;
3. the shunt transformer has low insulation requirement and low manufacturing cost;
4. simple structure and high reliability in use.
Description of the drawings
Fig. 1 is a schematic view of the overall configuration of the control apparatus of the present invention.
Fig. 2 is a schematic structural diagram of a shunt module formed by a double-winding shunt transformer.
Fig. 3 is a schematic structural diagram of a shunt module formed by the autotransformer.
Fig. 4 is a schematic structural diagram of a voltage dividing module.
FIG. 5 is a schematic side view of a temperature control module.
Fig. 6 is a cross-sectional view of a temperature sensing module.
Fig. 7 is a cross-sectional view of a temperature sensing housing.
Fig. 8 is a schematic view of a temperature-sensitive right side seal.
FIG. 9 is a schematic view of a temperature-sensitive steel core assembly.
FIG. 10 is a schematic structural view of a shunt side interface and a steel core side interface of the temperature sensing steel core assembly. The structure of the shunting side interface 301 is the same as that of the steel core side interface 302.
Figure 11 is a diagrammatic view in cross-section of the slide rod shoe assembly.
Fig. 12 is a schematic view of a contact brush assembly.
Fig. 13 is a schematic view of a wiper configuration.
Fig. 14 is a cross-sectional view of a sense resistor module.
Fig. 15 is a schematic diagram of a sense resistor housing.
Fig. 16 is a schematic view of a housing base.
Fig. 17 is a schematic view of the installation of the tension tower.
In the figure, 11 output connectors, 12 input aluminum wire connectors, 13 input steel core connectors, 14 ground wire connectors, 100 voltage division modules, 101 ground wire side interfaces, 102 wire side interfaces, 200 shunt modules, 201 leakage current interfaces, 202 output side interfaces, 203 temperature control side interfaces, 201a double winding leakage current interfaces, 202a double winding output side interfaces, 203a double winding temperature control side interfaces, 201b self coupling leakage current interfaces, 202b self coupling output side interfaces, 203b self coupling temperature control side interfaces, 300 temperature control modules, 301 shunt side interfaces, 302 steel core side interfaces, 303 voltage equalizing interfaces, 304 aluminum wire side interfaces, 310 temperature sensing modules, 311 temperature sensing right side seals, 312 temperature sensing shells, 314 temperature sensing steel cores, 316 temperature sensing slide bar seats, 317 slide bar conduits, 318 slide bars, 319 contact brushes, 329 sensing resistor modules, housing bases, 340 protection resistors, 334 starting switches a, 351 starts switch B, 360 contacts brush segment path, 361 conduit seal groove, 361a1, 361a2, 361B1, 361B2, 361c1, 361c2, conduit seal groove; 362 contact brush short interface, 363 embedded contact brush short circuit wire, 364 induction resistance connecting thread, 364a induction resistance connecting thread, 364b induction resistance connecting thread, 365 induction shell connecting thread, 365a induction shell connecting thread, 366a induction shell internal fixing point, 366b steel core sealing grooves, 367a and 367b steel core sealing grooves, 368a and 368b steel core interface thread, 369 steel core right side sealing thread, 367a1, 367a2, 367b1, 367b2, 367c1, 367c2, 367d1 and 367d2 sealing grooves and 400a and 400b left side thread; 401a, 401b right side threads; 402a and 402b steel wire outlets, 403 right side bottom covers, 404a and 404b external connecting sections, 405 mounting internal threads, 406 hexagonal nuts, 407 short circuit connecting interfaces; 421a, 421b slide bar seat body; 422 telescopic sliding grooves, 330a and 330b induction resistance wires, 440 induction resistance module shells, 441a and 441b induction resistance module right side threads, 442a and 442b induction resistance left side threads, 431 short circuit brushes, and 452a and 452b shell base mounting threads.
Fifth, detailed description of the invention
The accompanying drawings illustrate specific embodiments of the present invention.
See figure 1.
The single-phase passive anti-icing and de-icing resistance type control equipment for the tension tower is composed of a voltage division module, a shunt module and a temperature control module. The number of the external connecting joints is four, and the external connecting joints are respectively an output joint 11, an input aluminum wire joint 12, an input steel core joint 13 and a ground wire joint 14.
The voltage division module has two interfaces: a ground line side interface 101, a wire side interface 102; the ground line side interface 101 is short-circuited to the ground line terminal 14, and the conductor side interface 102 is short-circuited to the leakage current interface 201 of the shunt module.
The shunting module has three interfaces: a leakage current interface 201, an output side interface 202, and a temperature control side interface 203; the leakage current interface 201 is in short-circuit connection with the wire side interface 102 of the voltage division module; the output side interface 202 is short-circuited to the output terminal 11; the temperature control side interface 203 is short-circuited to the shunt side interface 301 of the temperature control module.
The temperature control module has four interfaces: a shunt side interface 301, a steel core side interface 302, a voltage sharing interface 303 and an aluminum wire side interface 304; the shunt side interface 301 is in short circuit connection with the shunt module temperature control side interface 203; the steel core side interface 302 is in short circuit connection with the input steel core joint 13; the voltage-sharing interface 303 is in short-circuit connection with the output connector 11; the aluminum line side interface 304 is short-circuited to the input aluminum line connector 12.
See figures 2 and 3.
The shunting module has two kinds: the shunt module comprises a shunt module formed by a bifilar winding shunt transformer and a shunt module formed by an auto-coupling shunt transformer.
The double-winding shunt transformer is a transformer structure with two windings, namely a shunt low-voltage winding and a shunt high-voltage winding, and the head ends of the low-voltage winding and the high-voltage winding are homonymous ends; the number of turns of the shunt low-voltage winding coil is less than that of the shunt high-voltage winding coil; when the double-winding shunt transformer is adopted, the leakage current interface is a double-winding leakage current interface 201 a; the output side interface is a double-winding output side interface 202 a; the temperature control side interface is a duplex winding temperature control side interface 203 a.
The auto-coupling shunt transformer adopts an auto-coupling boosting transformer structure, and only one transformer winding is called as an auto-coupling shunt winding; the head end of the shunt high voltage is the head end of the self-coupling shunt winding, and the shunt neutral point is the tail end of the self-coupling shunt winding; when the autotransformer is adopted, the leakage current interface is the autotransformer leakage current interface 201 b; the output side interface is a self-coupling output side interface 202 b; the temperature control side interface 203 is a self-coupled temperature control side interface 203 b.
Referring to fig. 4, the voltage division module is formed by connecting a voltage division resistor and a voltage division capacitor in parallel; after the voltage-dividing resistor and the voltage-dividing capacitor are connected in parallel, one end is connected to the ground line side interface 101, and the other end is connected to the wire side interface 102.
See FIGS. 5-16.
The temperature control module is composed of a temperature sensing module 310, a sensing resistor module 329, a protection resistor 340, a starting switch A and a starting switch B. One end of the protection resistor 340 is in short-circuit connection with the voltage-sharing interface 303, and the other end of the protection resistor 340 is in short-circuit connection with the aluminum wire side interface 304; one end of a starting switch A350 is in short-circuit connection with the voltage-sharing interface 303, and the other end of the starting switch A is in short-circuit connection with the aluminum wire side interface 304; one end of the starting switch B351 is in short-circuit connection with the steel core side interface 302, and the other end of the starting switch B351 is in short-circuit connection with the aluminum wire side interface 304. When ice melting is needed, the starting switch A and the starting switch B are disconnected, and the two ends of the switch A and the starting switch B are opened; when ice melting is not needed, the starting switch A and the starting switch B are closed, and two ends of the switch A and the starting switch B are short-circuited.
In this embodiment, the start switch a and the start switch B are implemented by zhejiang start solid electric limited: the model is as follows: GW9-12 high voltage isolation switch.
The temperature sensing module 310 consists of a temperature sensing outer shell 312, a temperature sensing right side seal 311, a temperature sensing steel core 314, a temperature sensing slide bar seat 316, a slide bar conduit 317, a slide bar 318 and a contact brush 319; and a shunt side interface 301, a steel core side interface 302 and an aluminum wire side interface 304 are arranged on the temperature sensing module.
The temperature sensing housing 312 and the temperature sensing right side seal 311 constitute a sensing housing assembly. The temperature sensing steel core 314, the inner fixing points 366a, 366b, the shunt side interface 301, the steel core side interface 302 constitute a temperature sensing steel core assembly. The temperature-sensitive slider mount 316, slider tube 317, and in-line wiper short circuit 363 form a slider mount assembly. The sliding bar 318, wiper 319, wiper short circuit 360 comprise a wiper assembly.
The temperature sensing shell 312 is a tubular structure, two ends of the tubular structure are respectively provided with left threads 400a and 400b and right threads 401a and 401b, and the left threads and the right threads are both internal threads; steel wire outlets 402a and 402b are arranged on the side surface of the temperature sensing shell; the steel wire outlet is a round hole on the side surface of the temperature sensing shell, and the diameter of the round hole is consistent with that of the temperature sensing steel core 314; steel core sealing grooves 367a1, 367a2, 367b1, 367b2, 367c1, 367c2, 367d1 and 367d2 are carved on the wall of the side circular hole; the steel core sealing groove is used for placing annular sealing rings, when the external connecting sections 404a and 404b at the two ends of the temperature sensing steel core 314 pass through the steel wire outlets, the annular sealing rings are fixed in the steel core sealing groove 367a and 367b, and the external connecting sections 404a and 404b at the two ends of the temperature sensing steel core and the steel wire outlets are kept sealed; after all the components are installed, the temperature sensing shell and the components installed at the upper side form a closed space.
The temperature sensing right side seal 311 is provided with a right side seal thread 369 and a right side bottom cover 403, and the right side bottom cover and the right side seal thread are integrated; the right sealing thread 369 is an external thread and is tightly meshed with the right threads 401a and 401 b; the right bottom cover 403 is disc-shaped, and the diameter thereof is larger than or equal to that of the temperature sensing shell 312; the temperature sensing right seal 311 is the same as the right threads 401a, 401b of the temperature sensing housing 312 through a right seal thread 369, is tightly engaged, and a seal ring is added between the right bottom cover and the right side of the temperature sensing housing; so that the temperature sensing right side seal is sealed with the temperature sensing shell.
The diameter of the temperature sensing steel core 314 is the same as that of the used wire steel core, the middle section is a straight line, the two ends are external connecting sections 404a and 404b, and the external connecting sections and the middle section form 90 degrees. At the ends of the external connecting sections at both ends, steel core interface threads 368a, 368b are provided. The steel core interface threads are external threads and are used for being twisted with the connecting threads in the shunting side interface 301 and the steel core side interface 302; the material of the temperature induction steel core 314 is completely the same as that of the inner conductor steel core of the self-made heat conducting wire; the external connecting sections 404a and 404b at two ends of the temperature sensing steel core penetrate through the steel wire outlet, and the steel core interface threads at the two ends are respectively meshed with the mounting internal threads of the shunting side interface 301 and the steel core side interface 302; the inner fastening points 366a, 366b are discs welded to the outer connecting section on the side adjacent the intermediate section; the radius of the disc of the inner fixing point is larger than that of the steel core, and the inner fixing point is tightly attached to the inner wall of the temperature sensing shell 312 during installation.
The temperature sensing shell and the temperature sensing right side seal are made of insulating materials with good mechanical properties, and in the embodiment, the temperature sensing shell and the temperature sensing right side seal are made of polyphenyl ether materials through mould pressing by using a mould pressing process.
Referring to fig. 10, the shunting side interface 301 and the steel core side interface 302 have the same structure; the shunt side interface 301 and the steel core side interface 302 are formed by welding a short circuit connecting interface 407 and a hexagon nut 406, and the short circuit connecting interface and the hexagon nut are both made of metal materials; the short circuit connection interface is annular; the hexagon nut is in a regular hexagon column shape, and an installation internal thread 405 is arranged in the middle of the hexagon nut; the internal mounting threads 405 mate with and mate with the core interface threads 368a, 368 b.
In the slide rod seat assembly, the temperature sensing slide rod seat comprises three parts of sensing resistor connecting threads 364a and 364b, slide rod seat bodies 421a and 421b and sensing shell connecting threads 365a and 365 b; the induction resistance connecting threads, the sliding rod seat body and the induction shell connecting threads are coaxially connected into a whole, the axis is a columnar hollow body, and the diameter of the columnar hollow body is the same as the inner diameter of the sliding rod guide pipe; the connecting thread of the induction resistor is the same as the connecting thread of the induction shell in size; the diameter of the slide bar seat body is larger than the diameter of the connecting thread of the induction shell; the connecting thread of the induction resistor and the connecting thread of the induction shell are external threads; the big diameter of the connecting thread of the induction shell is the same as that of the left threads 400a and 400b, the connecting thread of the induction shell is precisely meshed with the left threads, and a sealing ring is added in the middle of the connecting thread of the induction shell during meshing so as to seal the connecting thread and the left threads; the big diameter of the connecting thread of the induction resistor is the same as the big diameter of the right thread of the induction resistor, and is tightly meshed with the right thread of the induction resistor.
The sliding bar conduit 317 is a tubular structure with an inner diameter slightly larger than the outer diameter of the sliding bar 318. The hollow cavity in the middle of the slide rod guide pipe is the same as the axis of the columnar hollow body of the temperature sensing slide rod seat, and the inner diameter of the hollow cavity is the same, so that the hollow cavity and the columnar hollow body form a whole, and the whole is called as a telescopic chute 422; the sliding rod 318 is arranged in the telescopic chute 422 and slides in the telescopic chute; the left side of the sliding rod guide tube is provided with a plurality of guide tube sealing grooves 361a1, 361a2, 361b1, 361b2, 361c1 and 361c 2; a sealing ring is added in the middle of the sealing groove of the guide pipe, so that when the sliding rod 318 moves left and right in the sliding rod guide pipe, sealing between the telescopic sliding grooves at two ends of the sealing ring is ensured.
The embedded contact brush short circuit line 363 is made of metal material; embedded between the inductive resistance connecting threads 364a, 364b and the sliding rod seat bodies 421a, 421 b; there are aluminum line side interfaces 304 and wiper short interfaces 362 at both ends; the aluminum wire side interface 304 is exposed at the side surfaces of the slide bar seat bodies 421a and 421 b; the wiper short 362 is exposed at the bottom left side of the sense resistor connection threads. The induction resistance connecting threads 364a and 364b, the sliding rod seat bodies 421a and 421b and the induction shell connecting threads 365a and 365b are made of engineering plastics, in the embodiment, polyphenyl ether is adopted, the induction resistance connecting threads are molded into a whole by adopting a molding process, and the embedded contact brush short-circuit line 363 is embedded in the middle of the induction resistance connecting threads.
In the schematic view of the contact brush assembly shown in fig. 12, the sliding rod 318 is cylindrical, the outer diameter of the sliding rod is slightly smaller than the inner diameter of the sliding rod guide tube 317, and the sliding rod passes through the sealing rings in the middle of the guide tube sealing grooves 361a1, 361a2, 361b1, 361b2, 361c1 and 361c2, so that the space of the telescopic sliding grooves 422 on the left and right sides of the sealing ring in the sliding rod guide tube keeps sealed during sliding; the sliding rod 318 is a whole; the bottom of the left side of the slide bar has a wiper screw mounting hole for securing with a wiper 319.
The wiper 319 is made up of a fixed disk 430 and a shorting brush 431; the fixed disc and the short circuit brush are made of metal materials, the fixed disc is disc-shaped, the short circuit brush 431 is formed by welding a large number of equal-length metal wires on the fixed disc, the metal wires axially pass through the center of the fixed disc, and all the metal wires form a circular ring shape; a slide bar mounting hole 432 is formed in the center of the fixed disk, and a contact brush 319 and a slide bar 318 are fixed into a whole by screws passing through the slide bar mounting hole and the contact brush screw mounting hole.
A contact brush short circuit line 360 made of a metal material, one end of which is welded to the fixed disk 430; one end is welded at the contact brush short-circuit interface 362, so that the short-circuit brush is in short-circuit connection with the aluminum wire side interface 304; the wiper shorting bar 360 is looped around the slider bar 318 such that the wiper shorting bar moves between the active zones when the slider bar is moved left and right, and the shorting brush 431 remains in short circuit connection with the aluminum side interface 304.
See fig. 14-16. The sense resistor module 329 is composed of a housing base 334, sense resistor wires 330a and 330b, a sense resistor housing 440, and a voltage equalizing interface 303.
The sense resistor housing 440 has a cylindrical structure, and has sense resistor right-side threads 441a and 441b and sense resistor left-side threads 442a and 442b on the left and right sides, respectively; the right side thread of the induction resistor and the left side thread of the induction resistor are both internal threads, and the specification and the size are the same; the right side thread of the induction resistor is the same as the induction resistor connecting threads 364a and 364b, and is tightly meshed with the induction resistor connecting threads, and a sealing ring is added between the right side thread and the induction resistor connecting threads during installation; the left thread of the induction resistor is tightly meshed with the mounting threads 452a and 452b of the base of the shell, and a sealing ring is added in the middle during mounting; the induction group wires 330a and 330b are exposed and surround the inner wall of the induction resistor, the adjacent induction group wires have a certain distance, and the side surfaces of different circles of resistance wires are not connected; the left end of the induction resistance wire is in short-circuit connection with the voltage-sharing interface 303; the short brush 431 is in short circuit connection with the induction resistance wire, and the short brush is in short circuit connection with the aluminum wire side interface 304; when the slide bar 318 moves left and right, the short circuit brush 431 is driven to move left and right; when the short brush moves leftwards, the length of the resistance wire between the short brush and the voltage-sharing interface 303 is shortened, and the resistance between the voltage-sharing interface 303 and the aluminum wire side interface 304 is reduced; when the short brush moves rightwards, the length of the resistance wire between the short brush 431 and the voltage-sharing interface 303 is extended, and the resistance between the voltage-sharing interface 303 and the aluminum wire side interface 304 is increased.
When the temperature of the temperature sensing steel core rises, the oil temperature in the temperature sensing shell rises, the oil temperature expands after rising, the sliding rod is pushed to move leftwards, the resistance between the voltage sharing interface 303 and the aluminum wire side interface 304 is reduced, the current of the temperature sensing steel core is reduced, and the temperature of the temperature sensing steel core is reduced. When the temperature of the temperature sensing steel core is reduced, the oil temperature in the temperature sensing shell is reduced, the oil temperature is reduced, the volume is shrunk, the sliding rod is pushed to move rightwards, the resistance between the voltage sharing interface 303 and the aluminum wire side interface 304 is increased, the current of the temperature sensing steel core is increased, and the temperature of the temperature sensing steel core is increased.
The casing base 334 is divided into a base support body 450 and a thread support body 451, and is made of engineering plastics, in the embodiment, polyphenyl ether is adopted, and the whole structure is molded by adopting a molding process; the base support body and the thread support body are cylindrical and coaxial, and the diameter of the base support body is larger than that of the thread support body; the outer side of the threaded support body is provided with shell base mounting threads 452a and 452b, the shell base mounting threads are external threads, the diameters of the external threads are consistent with the diameters of the threads on the left side of the induction resistor, and the external threads and the induction resistor are tightly meshed.
See fig. 17.
The power transmission conductor adopted in the embodiment is a self-made heat conductor disclosed by "CN 201810370549.8", the outer conductor is aluminum stranded wires 607a and 607b, and the inner conductor is steel cores 605a and 605 b.
The installation mode of strain insulator tower is as follows: insulators 603a and 603b are respectively mounted on two sides of the cross arm 601; on the other side of the insulator, tension clamps 604a, 604b are mounted.
Assuming that power is delivered from the right side to the left side; the left and right steel cores are tightly connected to the tension-resisting clamp; the steel core on the right side is in short circuit connection with the input steel core joint 13; the right aluminum stranded wire is in short circuit connection with the input aluminum wire joint 12; after the steel core on the left side is in short circuit with the aluminum stranded wire, the steel core is in short circuit connection with the output joint 11; the ground terminal 14 is connected to ground via a ground switch 608.
When ice melting is required, the ground switch 608 is closed, so that the ground wire joint and the ground wire are short-circuited; when ice melting is not needed, the ground wire switch is opened, and the ground wire joint is disconnected with the ground wire. The ground wire switch adopts Zhejiang fixed electrical company: the model is as follows: GW9-12 high voltage isolation switch.
The design parameter calculation method of the embodiment: outer conductorDiameter, by DwRepresents; the length of a self-made heat conducting wire between two strain towers provided with the device is represented by L; inner conductor outer channel, using DnRepresents; the self-made thermal conductor insulation layer thickness is expressed by dz; resistivity of inner conductor, using AnRepresents; rated transmission current, denoted IA; rated transmission voltage: represented by VA; and setting the partial pressure coefficient of the partial pressure module to kf, wherein the value of kf is between 0.7 and 0.95.
All units are metric units: length unit: rice (m); time unit: seconds (sec). Mass unit: kilograms (kg). Temperature unit: kelvin (K).
The turn ratio of the transformer is as follows:
the shunt transformer is a double-winding shunt transformer or an autotransformer; the turn ratio of the two transformers is the same;
the shunt transformer is a step-up transformer, and the turn ratio is as follows:
maximum value of the induction resistance:
the maximum value of the induction resistor is the value when the temperature of the temperature induction steel core is the lowest;
protection resistance:
voltage-dividing resistance:
setting the divider resistance to RF
Voltage-dividing capacitance:
if the inductance of the shunt transformer is LF and the voltage-dividing capacitance is CF, then:
Claims (7)
1. the utility model provides a single-phase passive anti-icing ice-melt resistance type controlgear for strain insulator tower which characterized in that: the control equipment consists of a voltage division module, a shunt module and a temperature control module; four external connecting joints are provided, namely an output joint (11), an input aluminum wire joint (12), an input steel core joint (13) and a ground wire joint (14);
the voltage division module has two interfaces: a ground line side interface (101) and a wire side interface (102); the ground wire side interface (101) is in short-circuit connection with the ground wire joint (14), and the lead wire side interface (102) is in short-circuit connection with the leakage current interface (201) of the shunt module;
the shunt module has three interfaces: a leakage current interface (201), an output side interface (202), and a temperature control side interface (203); the leakage current interface (201) is in short-circuit connection with the wire side interface (102) of the voltage division module; the output side interface (202) is in short-circuit connection with the output connector (11); the temperature control side interface (203) is in short-circuit connection with the shunt side interface (301) of the temperature control module;
the temperature control module has four interfaces: the device comprises a shunting side interface (301), a steel core side interface (302), a voltage sharing interface (303) and an aluminum wire side interface (304); the shunt side interface (301) is in short-circuit connection with the shunt module temperature control side interface (203); the steel core side interface (302) is in short circuit connection with the input steel core joint (13); the voltage-sharing interface (303) is in short-circuit connection with the output connector (11); the aluminum wire side interface (304) is in short circuit connection with the input aluminum wire connector (12);
the shunting module has two kinds: a shunt module consisting of a bifilar shunt transformer and a shunt module consisting of an autotransformer;
the double-winding shunt transformer is a transformer structure with two windings, namely a shunt low-voltage winding and a shunt high-voltage winding, and the head ends of the low-voltage winding and the high-voltage winding are homonymous ends; the number of turns of the shunt low-voltage winding coil is less than that of the shunt high-voltage winding coil; when a double-winding shunt transformer is adopted, the leakage current interface is a double-winding leakage current interface (201 a); the output side interface is a double-winding output side interface (202 a); the temperature control side interface is a duplex winding temperature control side interface (203 a);
the auto-shunt transformer adopts an auto-boost transformer structure and is provided with only one transformer winding, namely an auto-shunt winding; the head end of the shunt high voltage is the head end of the self-coupling shunt winding, and the shunt neutral point is the tail end of the self-coupling shunt winding; when the autotransformer is adopted, the leakage current interface is an autotransformer leakage current interface (201 b); the output side interface is a self-coupling output side interface (202 b); the temperature control side interface is a self-coupling temperature control side interface (203 b);
the voltage division module is formed by connecting a voltage division resistor and a voltage division capacitor in parallel; after the divider resistor and the divider capacitor are connected in parallel, one end of the divider resistor is connected with the ground wire side interface (101), and the other end of the divider resistor is connected with the lead wire side interface (102);
the temperature control module consists of a temperature sensing module (310), a sensing resistor module (329), a protection resistor (340), a starting switch A and a starting switch B; one end of the protective resistor (340) is in short-circuit connection with the voltage-sharing interface (303), and the other end of the protective resistor is in short-circuit connection with the aluminum wire side interface (304); one end of a starting switch A (350) is in short-circuit connection with the voltage-sharing interface (303), and the other end of the starting switch A is in short-circuit connection with the aluminum wire side interface (304); one end of a starting switch B (351) is in short-circuit connection with the steel core side interface (302), and the other end of the starting switch B is in short-circuit connection with the aluminum wire side interface (304); when ice melting is needed, the starting switch A and the starting switch B are disconnected, and the two ends of the switch A and the starting switch B are opened; when ice melting is not needed, the starting switch A and the starting switch B are closed, and the two ends of the switch A and the starting switch B are short-circuited;
the temperature sensing module (310) consists of a temperature sensing outer shell (312), a temperature sensing right side seal (311), a temperature sensing steel core (314), a temperature sensing slide bar seat (316), a slide bar guide pipe (317), a slide bar (318) and a contact brush (319); a shunt side interface (301), a steel core side interface (302) and an aluminum wire side interface (304) are arranged on the temperature sensing module;
the temperature sensing shell (312) and the temperature sensing right side seal (311) form a sensing shell component;
the temperature sensing steel core 314, the inner fixing points (366a and 366b), the shunt side interface (301) and the steel core side interface (302) form a temperature sensing steel core assembly;
the temperature sensing slide rod seat (316), the slide rod guide pipe (317) and the embedded contact brush short-circuit line (363) form a slide rod seat component;
the sliding rod (318), the contact brush (319) and the contact brush short-circuit line (360) form a contact brush component;
the temperature sensing shell (312) is of a tubular structure, two ends of the tubular structure are respectively provided with left threads (400a, 400b) and right threads (401a, 401b), and the left threads and the right threads are both internal threads; the steel wire outlets (402a, 402b) are arranged on the side surface of the temperature sensing shell; the steel wire outlet is a round hole on the side surface of the temperature sensing shell, and the diameter of the round hole is consistent with that of the temperature sensing steel core (314); steel core sealing grooves (367a1, 367a2, 367b1, 367b2, 367c1, 367c2, 367d1 and 367d2) are carved on the wall of the side circular hole; the steel core sealing groove is used for placing an annular sealing ring, when the external connecting sections (404a, 404b) at the two ends of the temperature sensing steel core (314) penetrate through the steel wire outlet, the annular sealing ring is fixed in the steel core sealing groove (367a, 367b), and the external connecting sections (404a, 404b) at the two ends of the temperature sensing steel core and the steel wire outlet are kept sealed; after all the components are installed, the temperature sensing shell and the components installed at the upper side form a closed space;
the temperature sensing right side seal (311) is provided with a right side seal thread (369) and a right side bottom cover (403), and the right side bottom cover and the right side seal thread are integrated; the right sealing thread (369) is an external thread and is tightly meshed with the right threads (401a and 401 b); the right bottom cover (403) is in a disc shape, and the diameter of the right bottom cover is larger than or equal to that of the temperature sensing shell (312); the temperature sensing right side seal (311) is the same as the right side threads (401a, 401b) of the temperature sensing shell (312) through a right side seal thread (369), is tightly meshed, and a sealing ring is arranged between the right side bottom cover and the right side of the temperature sensing shell; so that the temperature sensing right side seal is sealed with the temperature sensing shell;
the diameter of the temperature sensing steel core (314) is the same as that of the used wire steel core, the middle section is a straight line, the two ends are external connecting sections (404a, 404b), and the external connecting sections and the middle section form an angle of 90 degrees; the ends of the external connecting sections at the two ends are provided with steel core interface threads (368a, 368 b); the steel core interface threads are external threads and are used for being twisted with connecting threads in the shunting side interface (301) and the steel core side interface (302); the temperature induction steel core (314) is completely the same as the material of the steel core of the inner conductor of the self-made heat conducting wire; external connecting sections (404a, 404b) at two ends of the temperature sensing steel core penetrate through the steel wire outlet, and steel core interface threads at two ends are respectively meshed with mounting internal threads with a shunting side interface (301) and a steel core side interface (302); the inner fixing points (366a, 366b) are discs welded on one side of the outer connecting section near the middle section; the radius of the disc of the inner fixed point is larger than that of the steel core, and the inner fixed point is tightly attached to the inner wall of the temperature sensing shell (312) during installation.
2. The single-phase passive anti-icing de-icing resistive control device for a strain tower of claim 1, wherein: the shunting side interface (301) and the steel core side interface (302) have the same structure; the shunt side interface (301) and the steel core side interface (302) are formed by welding a short circuit connection interface (407) and a hexagonal nut (406), and the short circuit connection interface and the hexagonal nut are made of metal materials; the short circuit connection interface is annular; the hexagonal nut is in a regular hexagon column shape, and an installation internal thread (405) is arranged in the middle of the hexagonal nut; the mounting internal thread (405) is matched with the net core interface threads (368a, 368b) and is tightly meshed.
3. The single-phase passive anti-icing de-icing resistive control device for a strain tower of claim 2, wherein: in the slide rod seat assembly, the temperature sensing slide rod seat comprises three parts, namely sensing resistance connecting threads (364a and 364b), a slide rod seat body (421a and 421b) and a sensing shell connecting thread (365a and 365 b); the induction resistance connecting threads, the sliding rod seat body and the induction shell connecting threads are coaxially connected into a whole, the axis is a columnar hollow body, and the diameter of the columnar hollow body is the same as the inner diameter of the sliding rod guide pipe; the connecting thread of the induction resistor is the same as the connecting thread of the induction shell in size; the diameter of the slide bar seat body is larger than the diameter of the connecting thread of the induction shell; the connecting thread of the induction resistor and the connecting thread of the induction shell are external threads; the big diameter of the connecting thread of the induction shell is the same as that of the left side thread (400a, 400b), the connecting thread of the induction shell is precisely meshed with the left side thread, and a sealing ring is added in the middle during meshing so as to seal the connecting thread and the left side thread; the big diameter of the connecting thread of the induction resistor is the same as the big diameter of the right thread of the induction resistor, and is tightly meshed with the right thread of the induction resistor;
the slide bar conduit (317) is of a tubular structure, and the inner diameter of the slide bar conduit is slightly larger than the outer diameter of the slide bar (318); the hollow cavity in the middle of the slide bar conduit is the same as the axis of the columnar hollow body of the temperature sensing slide bar seat, and the inner diameter of the hollow cavity is the same, so that the hollow cavity and the columnar hollow body form a whole, and the whole is called as a telescopic chute (422); the sliding rod (318) is arranged in the telescopic sliding chute (422) and slides in the telescopic sliding chute; the left side of the sliding rod guide pipe is provided with a plurality of guide pipe sealing grooves (361a1, 361a2, 361b1, 361b2, 361c1 and 361c 2); a sealing ring is added in the middle of the sealing groove of the guide pipe, so that when the sliding rod (318) moves left and right in the sliding rod guide pipe, the sealing between the telescopic sliding chutes at the two ends of the sealing ring is ensured;
the embedded contact brush short circuit line (363) is made of metal material; is embedded between the inductive resistance connecting screw threads (364a, 364b) and the sliding rod seat bodies (421a, 421 b); an aluminum wire side interface (304) and a contact brush short interface (362) are arranged at two ends; the aluminum wire side interface (304) is exposed out of the side surface of the sliding rod seat body (421a, 421 b); the contact brush short interface (362) is exposed out of the bottom surface of the left side of the connecting thread of the induction resistor;
the inductive resistance connecting screw thread (364a, 364b), the sliding rod seat body (421a, 421b), and the inductive shell connecting screw thread (365a, 365b) are integrated, and the embedded type contact brush short circuit line (363) is embedded in the middle of the inductive resistance connecting screw thread.
4. The single-phase passive anti-icing de-icing resistive control device for a strain tower of claim 1, wherein: in the contact brush component, a sliding rod (318) is cylindrical, the outer diameter of the sliding rod is slightly smaller than the inner diameter of a cavity in the middle of a sliding rod guide pipe (317), and the sliding rod penetrates through sealing rings in the middle of guide pipe sealing grooves (361a1, 361a2, 361b1, 361b2, 361c1 and 361c2), so that the space of telescopic sliding chutes (422) on the left side and the space of telescopic sliding chutes (422) on the right side of the sealing rings in the sliding rod guide pipe are kept sealed during sliding; the sliding rod 318 is a whole; a contact brush screw mounting hole is formed in the bottom of the left side of the sliding rod and used for being fixed with a contact brush 319;
the contact brush (319) is composed of a fixed disc (430) and a short-circuit brush (431); the fixed disc and the short circuit brush are made of metal materials, the fixed disc is disc-shaped, a large number of equal-length metal wires are welded on the fixed disc, the metal wires axially pass through the center of the fixed disc, and all the metal wires form a circular ring shape; a slide bar mounting hole (432) is formed in the circle center of the fixed disc, and a contact brush (319) and a slide bar (318) are fixed into a whole through a screw passing through the slide bar mounting hole and a contact brush screw mounting hole;
a contact brush short-circuit line (360) which is made of metal material and one end of which is welded on the fixed disc (430); one end of the short circuit brush is welded on the short contact brush interface (362) so that the short circuit brush is in short circuit connection with the aluminum wire side interface (304); the wiper short-circuit line 360 is looped around the slider bar (318) such that when the slider bar is moved left and right, the wiper short-circuit line has an active zone and maintains the short-circuit connection of the shorting brush (431) to the aluminum line side interface (304).
5. The single-phase passive anti-icing de-icing resistive control device for a strain tower of claim 1, wherein: the induction resistance module (329) is composed of a shell base (334), induction resistance wires (330a, 330b), an induction resistance shell (440) and a voltage-sharing interface (303);
the induction resistor shell (440) is of a cylindrical structure, and right and left induction resistor threads (441a, 441b) and left induction resistor threads (442a, 442b) are respectively arranged on the left side and the right side; the right side thread of the induction resistor and the left side thread of the induction resistor are both internal threads, and the specification and the size are the same; the right side thread of the induction resistor is the same as the connecting threads (364a, 364b) of the induction resistor, and is tightly meshed with the connecting threads of the induction resistor, and a sealing ring is added between the threads during installation; the left thread of the induction resistor is tightly meshed with the mounting threads (452a, 452b) of the base of the shell, and a sealing ring is added in the middle during mounting; the induction group wires (330a, 330b) are exposed and surrounded on the inner wall of the induction resistor, the adjacent induction group wires have a certain distance, and the side surfaces of different circles of resistance wires are not connected; the left end of the induction resistance wire is in short-circuit connection with the voltage-sharing interface (303); the short-circuit brush (431) is in short-circuit connection with the induction resistance wire and is in short-circuit connection with the aluminum wire side interface (304); when the sliding rod (318) moves left and right, the short circuit brush (431) is driven to move left and right; when the short circuit brush moves leftwards, the length of a resistance wire between the short circuit brush and the voltage-sharing interface (303) is shortened, and the resistance between the voltage-sharing interface (303) and the aluminum wire side interface (304) is reduced; when the short circuit brush moves rightwards, the length of a resistance wire between the short circuit brush (431) and the voltage-sharing interface (303) is extended, and the resistance between the voltage-sharing interface (303) and the aluminum wire side interface (304) is increased;
the shell base (334) is divided into a base support body (450) and a thread support body (451), is made of engineering plastics and is molded into an integral structure by adopting a die pressing process; the base support body and the thread support body are cylindrical and coaxial, and the diameter of the base support body is larger than that of the thread support body; the outer side of the threaded support body is provided with a shell base mounting thread (452a, 452b), the shell base mounting thread is an external thread, the diameter of the external thread is consistent with that of the left side thread of the induction resistor, and the shell base mounting thread and the induction resistor are tightly meshed.
6. The single-phase passive anti-icing de-icing resistive control device for a strain tower of claim 1, wherein: the installation mode of strain insulator tower is as follows: insulators (603a, 603b) are respectively arranged on two sides of the cross arm (601); installing tension-resistant clips (604a, 604b) on the other side of the insulator;
assuming that power is delivered from the right side to the left side; the outer conductors are aluminum stranded wires (607a, 607b), and the inner conductors are steel cores (605a, 605 b); the left and right steel cores are tightly connected to the tension-resisting clamp; the steel core on the right side is in short circuit connection with an input steel core joint (13); the right aluminum stranded wire is in short circuit connection with the input aluminum wire joint (12); the steel core on the left side is in short circuit with the aluminum stranded wire and then is in short circuit connection with the output connector (11); the ground wire connector (14) is connected with the ground wire through a ground wire switch (608);
when ice melting is needed, the ground wire switch (608) is closed, so that the ground wire joint and the ground wire are in short circuit; when ice melting is not needed, the ground wire switch is opened, and the ground wire joint is disconnected with the ground wire.
7. The single-phase passive anti-icing de-icing resistive control device for a strain tower of claim 1, wherein: outer conductor outer diameter D connected with single-phase passive anti-icing and de-icing resistance type control equipmentwRepresents; the length of the lead between the two tension towers is represented by L; inner conductor outer diameter DnRepresents; the thickness of the self-made thermal conductor insulation layer is denoted by dz; resistivity of inner conductor, using AnRepresents; the rated transmission current is denoted IA; the rated transmission voltage is represented by VA; setting the partial pressure coefficient of the partial pressure module as kf, wherein the value of kf is between 0.7 and 0.95; all units are metric units, length units: rice; time unit: second, mass unit: kilogram, temperature unit: kelvin;
the turn ratio of the transformer is as follows:
the shunt transformer is a double-winding shunt transformer or an autotransformer; the turn ratio of the two transformers is the same;
the shunt transformer is a step-up transformer, and the turn ratio is as follows:
maximum value of the induction resistance:
the maximum value of the induction resistor is the value when the temperature of the temperature induction steel core is the lowest;
protection resistance:
voltage-dividing resistance:
setting the divider resistance to RF
Voltage-dividing capacitance:
if the inductance of the shunt transformer is LF and the voltage-dividing capacitance is CF, then:
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