CN113507085B

CN113507085B - Three-phase passive anti-icing de-icing resistor type control equipment

Info

Publication number: CN113507085B
Application number: CN202110797460.1A
Authority: CN
Inventors: 莫思特; 刘首文; 李碧雄; 刘天琪; 曾成碧; 苗虹
Original assignee: Sichuan University; State Grid Hubei Electric Power Co Ltd
Current assignee: Sichuan University; State Grid Hubei Electric Power Co Ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2022-06-24
Anticipated expiration: 2041-07-14
Also published as: CN113507085A

Abstract

The utility model relates to the technical field of power transmission equipment, in particular to three-phase passive anti-icing and de-icing resistor type control equipment. The temperature sensing module, the sensing resistor module, the protection resistor, the change-over switch, the shunt module and the change-over switch. And four interfaces are arranged outside, namely an input steel core interface, an input aluminum wire interface, an output interface and a tower ground wire interface. The temperature sensing module and the sensing resistor module form a module. The temperature sensing module comprises a sensing shell component, a temperature sensing steel core component, a temperature sensing slide bar seat component and a contact brush component. The single-phase resistance type passive anti-icing and de-icing control equipment is fixed on a cross arm of a tension tower of a power transmission line through an insulator and is connected with the power transmission line through an external interface. The utility model adjusts the heating power of ice melting by adjusting the resistance value and the voltage value of the transmission line, and can better perform ice prevention and ice melting.

Description

Three-phase passive anti-icing and de-icing resistor type control equipment

Technical Field

The utility model relates to the technical field of power transmission equipment, in particular to three-phase passive anti-icing and de-icing resistor type control equipment.

Background

In power transmission, the tension tower bears the weight of the power transmission line and also bears the tension of the power transmission line. In cold weather, the power transmission line is easy to freeze, so that the gravity and the tension of the power transmission line are increased, and the conditions such as damage of the strain tower and the like can be caused.

Patent No. ZL201811489790.9 discloses a lossless single-phase shunt between lines and its design and control method. The shunt consists of an on-load tap-changer, a shunt transformer, a voltage-dividing transformer, a control motor, a microprocessor, two change-over switches and a temperature sensing unit and is arranged between two leads. The input end of the shunt is connected with the inner conductor close to one end of the electric load and the first selector switch; the output end is connected with the inner conductor, the outer conductor and the second change-over switch of the next section close to the sending end power supply. The shunt transformer and the bleeder transformer adopt step-up transformers, and the shunt transformer is divided into a double-winding shunt transformer and an auto-coupling shunt transformer according to different structures; the voltage dividing transformer is divided into a double-winding voltage dividing transformer and an auto voltage dividing transformer. 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 the dual modes of normal power transmission and ice prevention and melting, and is simple and reliable to operate. However, it has 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 are required to be reinforced for the stock power transmission line.

Patent No. 201921929880.5 provides a passive intelligent ice-melting control device, which is composed of a passive temperature sensor, a passive temperature control resistor and an ice-melting control switch. The control equipment is arranged on the self-made heat conducting wire, and two ends of the self-made heat conducting wire are respectively connected with the traditional power transmission line. The passive temperature sensors are two in the same structure and are tightly wrapped outside the self-made heat conducting wire. The sensing main body is sector cylindrical, and forms a sector cylindrical closed space with the mounting plate A, B, a stranded wire contact surface and an atmosphere contact surface, and temperature control liquid is filled in the sealed cavity. The passive temperature control resistor comprises a resistance wire, a contact electric brush, a conductive rod and an insulating rod. The resistance shell is cylindrical and is communicated with the temperature control liquid closed space through a connecting pipe interface. The utility model solves the problem that the intelligent ice melting equipment is difficult to get electricity in the using process, changes the change of the resistance by sensing the temperature change of the main body, automatically starts the ice melting of the transmission conductor, automatically stops the ice melting after sensing the ice melting, and keeps the temperature of the transmission conductor in a proper range. It has the following problems:

(1) the passive temperature sensor and the passive temperature control resistor are designed separately, so that the reliability of the equipment is influenced;

(2) the resistor emits larger heat, and better heat dissipation is needed in the using process; and this heat is lost.

Disclosure of Invention

The utility model aims to provide three-phase passive anti-icing and de-icing resistor type control equipment. Deicing can be well carried out, and normal operation of a power grid is guaranteed.

The embodiment of the utility model is realized by the following technical scheme:

a three-phase passive anti-icing and de-icing resistor type control device comprises a temperature sensing module, a sensing resistor module, a protection resistor, a protection capacitor, a change-over switch, a shunt module and a change-over switch; for a three-phase alternating current transmission line, each phase is externally provided with three and four interfaces which are respectively input steel core interfaces; inputting an aluminum wire interface; an output interface; a tower ground wire interface; the control equipment is connected with the power transmission line through an external interface: each phase is provided with a change-over switch, and two ends of each phase change-over switch are respectively connected with each corresponding input aluminum wire interface and input steel core interface in a short circuit manner;

the temperature sensing module has three external connection interfaces, and each phase has a set: each group of external connection interfaces comprises a steel core side interface and a steel core output interface; each phase of steel core side interface is in short circuit connection with the phase of input steel core interface; each phase steel core output interface is in short circuit connection with the temperature control side interface of the phase shunt module;

the sliding resistance interfaces are external connecting ends of the induction resistance wires, one for each phase, and are in short circuit connection with the phase output interfaces;

each phase is provided with a protection resistor, a protection capacitor and a change-over switch, and after the protection resistor, the protection capacitor and the change-over switch of each phase are connected in parallel, one end of the protection resistor, the protection capacitor and the change-over switch are in short-circuit connection with the phase output interface; the other end is in short circuit connection with the phase input aluminum wire interface;

the temperature sensing module comprises a temperature sensing shell, an upper bottom cover, a lower bottom cover, a temperature sensing steel core, a temperature sensing slide rod seat, a slide rod guide pipe, a slide rod and a contact brush; a steel core side interface, a steel core output interface and an aluminum wire side interface are arranged on the temperature sensing module; the aluminum wire side interface is in short circuit connection with the input aluminum wire interface;

the temperature sensing shell, the upper bottom cover and the lower bottom cover form a sensing shell component; the upper bottom cover is provided with three mounting ports; each mounting opening is connected with a temperature sensing slide bar seat;

the temperature sensing steel core, the inner fixing point, the steel core output interface and the steel core side interface form a temperature sensing steel core assembly; the temperature sensing steel core assembly is provided with three groups which are respectively arranged corresponding to one group of external connecting interfaces of the temperature sensing module;

the temperature sensing slide bar seat, the slide bar conduit and the embedded contact brush short-circuit line form a temperature sensing slide bar seat component; the temperature sensing slide rod seat assembly is provided with a group corresponding to each mounting port;

the sliding rod, the contact brush and the contact brush short-circuit line form a contact brush component; the contact brush assemblies are provided with one group corresponding to each mounting opening;

the number of the induction resistance modules is three, and each induction resistance module is one in each phase; the induction resistance module consists of a shell base, an induction resistance wire, an induction resistance shell and a sliding resistor interface;

the number of the shunting modules is three, and each shunting module is one for each phase; each phase current-dividing module consists of a boosting transformer, a voltage-dividing capacitor, a voltage-dividing resistor and a grounding switch; the temperature control side interface of each phase of the step-up transformer is in short circuit connection with the phase steel core output interface; the secondary output interface of each phase of the step-up transformer is in short circuit connection with the phase output interface; after the voltage dividing capacitor is connected with the series voltage dividing resistor in parallel, one end of the voltage dividing capacitor is in short circuit connection with a leakage current interface of the step-up transformer, and the other end of the voltage dividing capacitor is connected with one end of the grounding switch; one end of the grounding switch is connected with one end of the voltage-dividing capacitor and the serially connected voltage-dividing resistor, the other end of the grounding switch is in short-circuit connection with the ground wire side interface, and the ground wire side interface is in short-circuit connection with the tower ground wire interface.

Furthermore, in the temperature sensing module, the temperature sensing shell is of a tubular structure and is made of a material with good insulating property, and an installation screw hole is formed in the outer side of the upper end of the tubular structure; the outer side of the lower end is also provided with an installation screw hole;

the lower bottom cover is fixed at the lower end of the temperature sensing shell through the matching of a screw and an installation screw hole on the lower end surface of the temperature sensing shell; the upper bottom cover is matched with an installation screw hole on the upper end surface of the temperature sensing shell through a screw and is fixed at the upper end of the temperature sensing shell; a sealing gasket is arranged between the upper bottom cover and the top surface of the temperature sensing shell, so that the upper bottom cover and the temperature sensing shell are sealed; and a sealing gasket is arranged between the lower bottom cover and the top surface of the temperature sensing shell, so that the lower bottom cover and the temperature sensing shell are sealed.

Furthermore, the temperature sensing shell is provided with three steel core output mounting holes and three steel core side mounting holes; the diameters of the steel core output mounting hole and the steel core side mounting hole are slightly larger than the diameter of the temperature sensing steel core, so that the temperature sensing steel core can penetrate through the temperature sensing steel core; the temperature sensing steel core is arranged on the pipe wall of the tubular shell through the steel core output mounting hole and the steel core side mounting hole, and the inside and the outside of the temperature sensing steel core are kept sealed by adopting sealing gaskets; in the temperature sensing steel core assembly, the diameter of the temperature sensing steel core is the same as that of the steel core of the self-made heat conducting wire, 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 steel core output interface and the steel core side interface; the material and the diameter of the temperature sensing steel core and the inner conductor steel core of the self-made heat conducting wire are completely the same; the external connecting sections at two ends of the temperature sensing steel core penetrate through the steel core output mounting hole and the steel core side mounting hole, and the steel core interface threads at two ends are respectively meshed with the steel core output interface and the mounting internal threads of 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 steel core output interface and the steel core side interface have the same structure; the steel core output 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 steel core interface thread and is tightly meshed.

Furthermore, the 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; the induction resistance is connected with threads, the slide bar seat body and the induction shell are coaxially connected into a whole, the axis of the induction resistance is a columnar hollow body, and the diameter of the columnar hollow body is the same as the inner diameter of the slide bar conduit; the connecting thread of the induction resistor and the connecting thread of the induction shell have the same major diameter; the diameter of the temperature sensing slide rod seat body is larger than the major diameter of the connecting thread of the sensing shell; the connecting thread of the induction resistor and the connecting thread of the induction shell are external threads; the large diameter of the connecting thread of the induction shell is the same as that of the thread of the mounting port, the connecting thread of the induction shell is tightly occluded with the thread of the mounting port, and a sealing ring is added in the middle of the induction shell during occlusion, so that the induction shell and the mounting port are sealed; the major diameter of the connecting thread of the induction resistor is the same as that of the thread at the lower end of the induction resistor, and the connecting thread of the induction resistor is tightly meshed with the thread at the lower end 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 top end of the sliding rod guide pipe is provided with a plurality of guide pipe sealing grooves, and the guide pipe sealing grooves are used for placing sealing rings; 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 can slide in the telescopic sliding chute; the top end of the slide bar guide pipe is provided with a guide pipe sealing groove; a sealing ring is added in the middle of the sealing groove of the guide pipe, so that when the sliding rod slides up and down in the sliding rod guide pipe, the navigation sliding grooves at the two ends of the sealing ring are kept sealed;

the embedded contact brush short circuit line is made of metal material; the inductive resistor is embedded between the inductive resistor connecting thread and the sliding rod 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 top surface of the connecting thread of the induction resistor;

the sliding rod guide pipe, the inductive resistor connecting thread, the sliding rod seat body and the inductive shell connecting thread are made of engineering plastics with good insulating property, are molded into a whole by adopting a molding process, and embed the embedded contact brush short-circuit line in the middle of the sliding rod guide pipe, the inductive resistor connecting thread, the sliding rod seat body and the inductive shell connecting thread.

Furthermore, in the contact brush assembly, the sliding rod is cylindrical, the outer diameter of the sliding rod is slightly smaller than the inner diameter of the sliding rod guide pipe, the sliding rod can slide up and down in the sliding rod guide pipe and penetrates through the sealing ring in the middle of the sealing groove of the guide pipe, and therefore the spaces of the upper side and the lower side of the sealing ring in the sliding rod guide pipe are kept sealed during sliding; the sliding rod is made of a material with good insulating property and is molded into a whole by adopting a die pressing process; the end part of the sliding rod is provided with a contact brush screw mounting hole for fixing the contact brush;

the contact brush consists of a fixed disc 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 the contact brush and the slide bar are fixed into a whole by screws through the slide bar mounting hole and the contact brush screw mounting hole;

the contact brush short circuit line is made of metal materials, 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 slides up and down, the contact brush short-circuit wire has a movable interval and keeps short-circuit connection between the short-circuit brush and the aluminum wire side interface.

Furthermore, in the induction resistance module, the induction resistance shell is made of a material with good insulating property and is of a cylindrical structure, and the upper end and the lower end of the induction resistance shell are respectively provided with induction resistance lower end threads and induction resistance upper end threads; the lower end screw thread of the induction resistor and the upper end screw thread of the induction resistor are both internal threads, and the specification and the size are the same; the lower end screw thread of the induction resistor is tightly meshed with the connecting screw thread of the induction resistor, and a sealing ring is added between the lower end screw thread and the connecting screw thread of the induction resistor during installation; the upper end screw thread of the induction resistor is tightly meshed with the mounting screw thread of the base of the shell, and a sealing ring is added in the middle during mounting;

the induction electric wire is composed of an exposed resistance wire and surrounds the inner wall of the induction resistance module; the upper end of the induction resistance wire is in short-circuit connection with the interface of the sliding resistor; 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 through the contact brush short circuit line and the embedded contact brush short circuit line; when the sliding rod slides up and down, the short circuit brush is driven to slide up and down; when the short circuit brush slides upwards, the length of a resistance wire between the short circuit brush and the interface of the sliding resistor is shortened, and the resistance between the interface of the sliding resistor and the interface of the aluminum wire side is reduced; when the short circuit brush slides downwards, the length of a resistance wire between the short circuit brush and the interface of the sliding resistor is extended, and the resistance between the interface of the sliding resistor and the interface of the aluminum wire side is increased;

the base of the shell is divided into a base support body and a thread support body, the base support body and the thread support are made of engineering plastics with good insulating property, and an integral structure is molded 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 external threads, the external threads are consistent with the large diameter of the threads at the upper end of the induction resistor, and the external threads and the induction resistor are tightly meshed.

Further, when the tension tower is used and installed, horizontal insulators and vertical insulators are installed on two sides of a cross arm of the tension tower of the power transmission line respectively; installing tension-resistant clamps on the other side of the insulator in the horizontal direction, fixing the steel cores of the wires on the left side and the right side by using the tension-resistant clamps, and fixing the tension-resistant clamps on the cross arms by using the insulator;

assuming that power is delivered from the right side to the left side; the right side steel core and the left side steel core are respectively and fixedly connected to the right side tension-resisting clamp and the left side tension-resisting clamp; the steel core on the right side is in short circuit connection with the input steel core interface; the right aluminum stranded wire is in short circuit connection with the input aluminum wire interface; 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 interface; the single-phase resistance type passive anti-icing and de-icing control equipment for the tension tower is fixed on a cross arm of the tension tower of the power transmission line through a vertical insulator.

Further, the outer diameter of a power transmission line outer conductor connected with the single-phase resistance type passive anti-icing and de-icing control equipment for the tension tower is represented by Dw; the length of a self-made heat conducting wire between two strain towers provided with the device is represented by L; the inner conductor outer channel, denoted Dn; the self-made thermal conductor insulation layer thickness is expressed by dz; inner conductor resistivity, denoted by An; rated transmission current, denoted IA; rated transmission voltage: 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 unit: rice (m); time unit: seconds (sec), mass unit: kilograms (kg), temperature units: kelvin (K);

the maximum value of the induction resistor is the value when the temperature of the temperature induction steel core is the lowest;

the shunt transformer can be in a double-winding shunt transformer mode, and can also be an autotransformer; the turn ratio of the two transformers is the same;

the value of the divider resistance is set to be RF,

if the inductance of the shunt transformer is LF and the voltage-dividing capacitance is CF, then:

furthermore, four insulator hooks are arranged on the outer wall of the temperature sensing shell; the insulator hook is cylindrical, and one half of the insulator hook is embedded into the temperature sensing shell and forms a whole with the pipe wall of the temperature sensing shell; the other half of the insulator hook is exposed out of the outer side of the temperature sensing shell, and a circular insulator mounting hole is formed in the exposed part; the insulator mounting hole is used for being mounted and fastened with the insulator.

The utility model 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 structure is simple, the reliability in the using process is high, and the three-phase imbalance during ice melting can be avoided;

4. the transformer has low insulation requirement and low manufacturing cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic diagram of the overall structure of the control device of the present invention.

FIG. 2 is a schematic structural diagram of a temperature sensing module and a resistance sensing module;

fig. 3 is a schematic diagram of the general architecture of the control device of the present invention.

Fig. 4 is a schematic diagram of the connection of the temperature sensing housing with the upper and lower bottom covers.

Fig. 5 is a schematic view of the connection of the temperature sensing steel core and the temperature sensing outer shell.

Fig. 6 is a schematic sectional structure view of the steel core output interface 104 and the steel core side interface 100.

Fig. 7 is a schematic structural diagram of a temperature sensing housing.

Fig. 8 is a schematic view of the upper and lower covers.

Fig. 9 is a schematic view of the mounting port.

Fig. 10 is a cross-sectional view of a sense resistor module.

FIG. 11 is a schematic view of a housing base.

FIG. 12 is a cross-sectional view of the slide bar base assembly.

Fig. 13 is a schematic view of a contact brush assembly.

Fig. 14 is a schematic view of a wiper.

Fig. 15 is a component frame diagram of a splitter module.

Fig. 16 is a schematic structural diagram of a dual-winding shunt transformer.

Fig. 17 is a schematic structural view of an autotransformer.

Fig. 18 is a schematic view of the control device installation and use.

Figure 19 is a schematic view of the connection of the insulator hanger to the temperature sensing housing.

Icon: 1 input steel core interface, 2 input aluminum wire interface, 3 output interface, 40 protection resistor, 50 protection capacitor, 60 change-over switch, 80 shunt module, 21 change-over switch, 10 temperature sensing module, 100 steel core side interface, 102 upper bottom cover, 1021 mounting port, 103 temperature sensing steel core, 104 steel core output interface, 105 lower bottom cover, 110 temperature sensing outer shell, 200 aluminum wire side interface, 201 temperature sensing slide bar seat, 202 slide bar conduit, 203 slide bar, 204 contact brush, 300 slide resistance interface, 20 induction resistor module, 301A, 301B induction group wire, 302 outer shell base, 210 contact short-circuit brush line, 211 conduit sealing groove, 212 contact brush short interface, 213 embedded contact brush short-circuit line, 131A, 131B internal fixing point, 133a, 133B line core interface screw thread, 132A, 132B, sealing washer 151A, 151B, 151C steel core output mounting hole, 152A, 152B, 151A, 151B, 151C steel core output mounting hole, and the like, 152C steel core side mounting hole, 153w, 153x, 153y, 153z insulator hook, 154w, 154x, 154y, 154z mounting screw hole, 155w, 155x insulator mounting hole, 145 mounting internal thread, 146 hexagonal nut, 147 short circuit connection interface, 165w, 165x mounting internal thread, 211a1, 211a2, 211b1, 211b2, 211C1, 211C2 conduit seal groove, 214a, 214b induction resistance connection thread, 215a, 215b induction shell connection thread, 221a, 221b slide bar seat body; 222 telescopic sliding chute, 230 fixed disc, 231 short circuit brush, 232 slide bar mounting hole, 340 induction resistance shell, 441a, 441b induction resistance lower end screw thread, 342a, 342b induction resistance upper end screw thread, 350 base support body, 351 screw thread support body, 352a, 352b shell base mounting screw thread, 601 cross arm, 603a1, 603b1, 603c1, 603a2, 603b2, 603c2 insulator, 604a1, 604b1, 604c1, right tension-resisting clamp, 604a2, 604b2, 604c2 left tension-resisting clamp, 605a1, 605b1, 605c1 right side steel core, 605a2, 605b2, 605c2 left side steel core, 607a1, 685b 1, 607c 4 right side aluminum stranded wire, 607a1, 685b 1, 1c1, 607c 4 left side aluminum stranded wire output interface, 802 side ground wire interface, 803 interface, 1 interface, 806 interface, and interface 806 interface with ground wire, 806 b, 1 and 806 interface with the same phase, 1 and 806 interface with the ground wire interface, 810 voltage-dividing resistors, 812 voltage-boosting transformers, 811 voltage-dividing capacitors, 813 grounding switches, 1A A phase input steel core interfaces, 1B B phase input steel core interfaces, 1C C phase input steel core interfaces, 2A A phase input aluminum wire interfaces, 2B B phase input aluminum wire interfaces, 2C C phase input aluminum wire interfaces, 3A A phase output interfaces, 3B B phase output interfaces, 3C C phase output interfaces, 603d, 603e, 603f, 603g vertical direction insulators, 100A A phase steel core side interfaces, 100B B phase steel core side interfaces, 100C C phase steel core side interfaces, 104A A phase steel core output interfaces, 104B B phase output interfaces, 104C C phase output interfaces, 200A A phase aluminum wire side interfaces, 200B B phase aluminum wire side interfaces, 200C C phase aluminum wire side interfaces, 300A A phase sliding resistance interfaces, 300B B looks sliding resistor interface, 300C C looks sliding resistor interface, 801A A looks secondary output interface, 801B B looks secondary output interface, 801C C looks secondary output interface, 802A A looks temperature control side interface, 802B B looks temperature control side interface, 802C C looks temperature control side interface.

Detailed Description

Example 1

See FIGS. 1-3 for further illustration

The utility model has four types of external interfaces, namely an input steel core interface 1, an input aluminum wire interface 2, an output interface 3 and a tower ground wire interface 4; a, B, C three phases exist in the alternating current transmission line, each phase is provided with one of four types of interfaces, and the tower ground wire interface is a three-phase common interface; therefore, the number of the external interfaces of the utility model is ten, except for the tower ground wire interface 4, the other nine interfaces are respectively called as an a-phase input steel core interface 1A, B phase input steel core interface 1B, C phase input steel core interface 1C, A phase input aluminum wire interface 2A, B phase input aluminum wire interface 2B, C phase input aluminum wire interface 2C, A phase output interface 3A, B phase output interface 3B, C phase output interface 3C according to the corresponding phase line. Two ends of the change-over switch 21 are respectively connected to the input aluminum wire interface 2 and the input steel core interface 1 in a short circuit mode.

The utility model is composed of a temperature sensing module 10, three sensing resistance modules 20, three shunt modules 80 and three change-over switches 21; the three sense resistor modules 20 are identical. One for each phase of sense resistor module 20, referred to as phase a sense resistor module 20A, B sense resistor module 20B, C sense resistor module 20C, respectively.

One for each phase of splitter module 80, referred to as phase a splitter module 80A, B phase splitter module 80B, C phase splitter module 80C, respectively; one for each phase of the change-over switch 21, referred to as a-phase change-over switch 21A, B phase change-over switch 21B, C phase change-over switch 21C, respectively; when ice melting is not performed, the change-over switch 21 is closed, the two ends of the switch are short-circuited, and when ice melting is performed, the short-circuit switch is opened, and the two ends of the switch are open. The change-over switch 21 adopts a high-voltage isolating switch with model number GW9-12 of Zhejiang Uighur electric company Limited.

The temperature-sensing module has two kinds of external interfaces, is steel core side interface 100 and steel core output interface 104 respectively, and to A, B, C three-phase alternating current transmission line, every looks all has steel core side interface and steel core output interface, and steel core side interface 100 includes promptly: the phase A steel core side interface 100A, B phase steel core side interface 100B, C phase steel core side interface 100C; the steel core output interface 104 comprises: the a-phase steel core output interface 104A, B phase steel core output interface 104B, C phase steel core output interface 104C.

Each sensing resistor module 20 is provided with an aluminum wire side interface 200 and a sliding resistor interface 300; for A, B, C three-phase ac transmission line, the aluminum line side interface 200 and the sliding resistance interface 300 are respectively called: the phase a sensing resistor module 20A has a phase a aluminum line side interface 200A and a phase a sliding resistor interface 300A; the B-phase induction resistance module 20B is provided with a B-phase aluminum wire side interface 200B and a B-phase sliding resistance interface 300B; the C-phase induction resistance module 20C has a C-phase aluminum wire side interface 200C and a C-phase sliding resistance interface 300C;

each shunt module 80 has a secondary output interface 801, a temperature control side interface 802, and a ground line side interface 803; for an A, B, C three-phase ac transmission line, the output interface 801, the temperature control side interface 802, and the ground line side interface 803 are respectively referred to as: the phase A shunt module 80A is provided with a phase A secondary output interface 801A, A phase temperature control side interface 802A, A phase ground line side interface 803A; the phase B shunt module 80B is provided with a phase B secondary output interface 801B, B phase temperature control side interface 802B, B phase ground line side interface 803B; the C-phase shunt module 80C has a C-phase secondary output interface 801C, C phase temperature control side interface 802C, C phase ground side interface 803C;

the a-phase ground wire side interface 803A, B phase ground wire side interface 803B, C phase ground wire side interface 803C is short-circuited with the tower ground wire interface 4. The phase-A temperature control side interface 802A is in short-circuit connection with the phase-A steel core output interface 104A of the temperature sensing module 10; the phase-B temperature control side interface 802B is in short circuit connection with the phase-B steel core output interface 104B of the temperature sensing module 10; the C-phase temperature control side interface 802C is in short-circuit connection with the C-phase steel core output interface 104C of the temperature sensing module 10; the phase-A secondary output interface 801A, A phase output interface 3A is in short-circuit connection with the phase-A sliding resistance interface 300A; the phase-B secondary output interface 801B, B phase output interface 3B is in short circuit connection with the phase-B sliding resistance interface 300B; the phase-C secondary output interface 801C, C phase output interface 3C is in short-circuit connection with the phase-C sliding resistance interface 300C; the A-phase steel core side interface 100A is in short-circuit connection with the A-phase input steel core interface 1A; the B-phase steel core side interface 100B is in short-circuit connection with the B-phase input steel core interface 1B; the C-phase steel core side interface 100C is in short-circuit connection with the C-phase input steel core interface 1C.

The phase a aluminum line side interface 200A is short-circuited with the phase a input aluminum line interface 2A; the B-phase aluminum wire side interface 200B is in short circuit connection with the B-phase input aluminum wire interface 2B; the C-phase aluminum wire side interface 200C is short-circuited with the C-phase input aluminum wire interface 2C; one end of the A-phase change-over switch 21A is in short-circuit connection with the A-phase aluminum wire side interface 200A, and the other end is in short-circuit connection with the A-phase steel core side interface 100A; one end of the B-phase change-over switch 21B is in short-circuit connection with the B-phase aluminum wire side interface 200B, and the other end of the B-phase change-over switch is in short-circuit connection with the B-phase steel core side interface 100B; one end of the C-phase change-over switch 21C is in short-circuit connection with the C-phase aluminum wire side interface 200C, and the other end is in short-circuit connection with the C-phase steel core side interface 100C;

the utility model is composed of a temperature sensing module 10, three sensing resistance modules 20, three shunt modules 80 and three change-over switches 21. One for each phase of sense resistor module 20, referred to as phase a sense resistor module 20A, B sense resistor module 20B, C sense resistor module 20C, respectively.

The temperature sensing module 10 has three sets of external connection interfaces, which correspond to each phase of the three-phase power transmission line. Each group of external connection interfaces comprises two external connection interfaces: a steel core side interface 100, a steel core output interface 104; the steel core side interface 100 is in short circuit connection with the input steel core interface 1; each phase steel core output interface (104) is in short circuit connection with the temperature control side interface (802) of the phase shunt module (80).

The sliding resistance interface 300 is an external connection end of the

induction resistance wires

301a and 301b, and is short-circuited to the output interface 3. After the protection resistor 40 and the protection capacitor 50 are connected in parallel with the change-over switch 60, one end is in short-circuit connection with the output interface 3; the other end is connected with the input aluminum wire interface 2 in a short circuit way. When ice is not melted, the change-over switch 60 is closed, and both ends of the switch are short-circuited, and when ice is melted, the change-over switch 60 is opened, and both ends of the switch are open-circuited.

The temperature sensing module 10 is composed of a temperature sensing shell 110, an upper bottom cover 102, a lower bottom cover 105, a temperature sensing steel core 103, a temperature sensing slide bar seat 201, an embedded contact brush short-circuit line 213, a slide bar conduit 202, a slide bar 203 and a contact brush 204; temperature sensing oil is sealed inside the temperature sensing shell 110; the temperature sensitive oil may be transformer oil. The temperature sensing module 10 is provided with a steel core side interface 100, a steel core output interface 104 and an aluminum wire side interface 200. The aluminum wire side interface 200 is in short circuit connection with the input aluminum wire interface 2;

the temperature sensing housing 110, the upper base cover 102 and the lower base cover 105 constitute a sensing housing assembly. The upper bottom cover 102 is provided with three mounting ports 1021; each mounting port 1021 is connected with a temperature sensing slide bar seat 201. Each mounting port 1021 is provided with mounting port

internal threads

165w, 165 x.

The temperature sensing steel core 103, the

inner fixing points

131a, 131b, the steel core output interface 104, the steel core side interface 204 constitute a temperature sensing steel core assembly. The temperature sensing steel core assembly is provided with three groups, and each group corresponds to one group of external connection interfaces of the temperature sensing module 10.

The temperature-sensitive slider mount 201, the slider tube 202, and the in-line wiper short-circuit wire 213 form a temperature-sensitive slider mount assembly. The temperature sensing slide bar seat assemblies are provided with one group corresponding to each mounting port 1021. The sliding bar 203, the wiper 204, and the wiper short-circuit line 210 constitute a wiper assembly. The contact brush assemblies are provided in a set corresponding to each mounting opening 1021.

The sensing resistor module 20 is composed of a housing base 302,

sensing resistor wires

301a and 301b, a sensing resistor housing 340, and a sliding resistor interface 300.

See fig. 3-9

In the temperature sensing module 10, the temperature sensing housing 110 is made of a material with good insulating property and has a tubular structure. Mounting

screw holes

154w, 154x, 154y and 154z are arranged on two end faces of the tubular structure. Three steel core

output mounting holes

151A, 151B, 151C and three steel core

side mounting holes

152A, 152B, 152C are provided at the side of the temperature sensing outer shell 110, corresponding to the three temperature sensing steel cores 103, respectively. The diameters of the steel core output mounting hole and the steel core side mounting hole of the temperature sensing outer shell 110 are slightly larger than the diameter of the temperature sensing steel core, so that the temperature sensing steel core can penetrate through the temperature sensing steel core; the temperature sensing steel core is arranged on the pipe wall of the tubular shell through a steel core output mounting hole and a steel core side mounting hole, and the inside and the outside of the temperature sensing steel core are kept sealed by adopting

sealing gaskets

132a and 132b, so that the sealing is kept between the external connecting sections at the two ends of the temperature sensing steel core 103 and the steel wire outlet; after all the components are mounted, the temperature sensing housing 110 forms a closed space with the components mounted on the upper side. The diameter of the temperature sensing steel core 103 is the same as that of the steel core of the self-made heat conducting wire, the middle section is a straight line, the two ends are external connecting sections, and the external connecting sections and the middle section form 90 degrees.

The lower cover bottom 105 is fixed to the lower end of the temperature sensing housing 110 by screws engaged with mounting screw holes of the lower end surface of the temperature sensing housing 110. The upper cover 102 is fixed to the upper end of the temperature sensing housing 110 by screws engaged with mounting screw holes formed in the upper end surface of the temperature sensing housing 110. A sealing gasket is installed between the upper cover 102 and the top surface of the temperature sensing housing 110 so that the upper cover 102 is sealed with the temperature sensing housing 110.

The temperature sensing housing 110, the upper bottom cover 102 and the lower bottom cover 105 are made of insulating materials with good mechanical properties.

The temperature sensing shell 110 is provided with three steel core output mounting holes 151A, 151B and 151C and three steel core side mounting holes 152A, 152B and 152C; the diameters of the steel core output mounting hole and the steel core side mounting hole are slightly larger than the diameter of the temperature sensing steel core, so that the temperature sensing steel core can penetrate through the temperature sensing steel core; the temperature sensing steel core is arranged on the pipe wall of the tubular shell through a steel core output mounting hole and a steel core side mounting hole, and the inside and the outside are kept sealed by sealing gaskets 132a and 132 b; in the temperature sensing steel core assembly, the diameter of a temperature sensing steel core 103 is the same as that of an inner conductor steel core of a self-made heat wire, the middle section is a straight line, two ends are external connecting sections, and the external connecting sections and the middle section form an angle of 90 degrees; steel core interface threads 133a and 133b are arranged at the end heads of the external connecting sections at the two ends; the steel core interface thread is an external thread and is used for being twisted with the connecting threads in the steel core output interface 104 and the steel core side interface 100; the material and the diameter of the temperature sensing steel core and the inner conductor steel core of the self-made heat conducting wire are completely the same; the external connecting sections at two ends of the temperature sensing steel core respectively penetrate through the steel core output mounting hole and the steel core side mounting hole, and the steel core interface threads at two ends are respectively meshed with the mounting internal threads of the steel core output interface 104 and the steel core side interface 100; the inner fixing points 131a, 131b are discs welded to the outer connecting section on the side close to the middle section; the radius of the disc at 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 110 during installation.

The steel core output interface 104 and the steel core side interface 100 have the same structure; the steel core output interface 104 and the steel core side interface 100 are formed by welding a short circuit connection interface 147 and a hexagon nut 146, and the short circuit connection interface 147 and the hexagon nut 146 are both made of metal materials; the short circuit connection interface is annular; the hexagon nut is in a regular hexagon column shape, and the middle part of the hexagon nut is provided with an internal thread 145; the internal mounting threads 145 mate with and tightly engage the steel

core interface threads

133a, 133 b.

See figures 10-14 of the drawings

The temperature sensing slide rod seat 201 comprises three parts, namely sensing resistance connecting threads 214a and 214b, slide rod seat bodies 221a and 221b and sensing shell connecting threads 215a and 215 b; the induction resistance is connected with threads, the slide bar seat body and the induction shell 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 slide bar conduit 202; the sensing resistor connecting threads 214a and 214b have the same major diameter as the sensing shell connecting threads 215a and 215 b; the diameter of the slide bar seat body is larger than the major 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 large diameter of the connecting thread of the induction shell is the same as that of the mounting port threads 165w and 165x, the connecting thread of the induction shell is precisely meshed with the mounting port threads, and a sealing ring is added in the middle of the meshing process to seal the connecting thread and the mounting port threads; the major diameter of the connecting thread of the sensing resistor is the same as that of the lower end threads 441a and 441b of the sensing resistor, and the connecting thread of the sensing resistor is tightly meshed with the lower end threads of the sensing resistor.

The slide bar conduit 202 is a tubular structure, and the inner diameter of the slide bar conduit is slightly larger than the outer diameter of the slide bar 203; at the upper end of the slide bar pipe, there are a plurality of pipe seal grooves 211a1, 211a2, 211b1, 211b2, 211c1, 211c2 for preventing a seal ring; the hollow cavity in the middle of the slide rod conduit is the same as the axis of the columnar hollow body of the temperature sensing slide rod seat, and the inner diameter of the columnar hollow body is the same, so that the columnar hollow body and the temperature sensing slide rod seat form a whole, and the whole is called as a telescopic chute 222; the sliding rod 203 is arranged in the telescopic sliding chute and can slide in the telescopic sliding chute; the upper end of the slide bar conduit is provided with conduit sealing grooves 211a1, 211a2, 211b1, 211b2, 211c1 and 211c 2; the sealing ring is added in the middle of the sealing groove of the guide pipe, so that when the sliding rod 203 slides up and down in the guide pipe of the sliding rod, the navigation sliding grooves at the two ends of the sealing ring are kept sealed.

The embedded contact brush short circuit line 213 is made of metal material; the inductive resistor is embedded between the inductive resistor connecting thread and the sliding rod seat body; the two ends are provided with an aluminum wire side interface 200 and a contact brush short interface 212; the aluminum wire side interface 200 is exposed out of the side surface of the slide bar seat body; the wiper short 212 is exposed at the top surface of the sense resistor connection threads.

The slider guide 202, the inductive

resistor connecting threads

214a, 214b, the

slider base bodies

221a, 221b, and the inductive

housing connecting threads

215a, 215b are made of engineering plastics with good insulating property, and are molded into a whole by a molding process, and the embedded contact brush short circuit line 213 is embedded in the middle of the integrated body.

In the contact brush component, the sliding rod 203 is cylindrical and is made of a material with good insulating property, the outer diameter of the sliding rod 203 is slightly smaller than the inner diameter of the sliding rod guide pipe, the sliding rod can slide up and down in the sliding rod guide pipe and penetrates through the sealing rings in the middle of the guide pipe sealing grooves 211a1, 211a2, 211b1, 211b2, 211c1 and 211c2, and therefore the spaces at the upper side and the lower side of the sealing rings in the sliding rod guide pipe are kept sealed during sliding; the slide bar is molded into a whole by adopting a molding process; the bottom of the upper end of the sliding rod is provided with a contact brush screw mounting hole for fixing the contact brush.

The contact brush 204 is composed of a fixed disk 230 and a shorting brush 231; the fixed disk 230 and the short circuit brush 231 are made of metal materials, the fixed disk is disc-shaped, a large number of equal-length metal wires are welded on the fixed disk, the metal wires axially pass through the center of the fixed disk, and all the metal wires form a circular ring shape; the center of the fixed disc is provided with a slide bar mounting hole, and the contact brush and the slide bar are fixed into a whole by screws passing through the slide bar mounting hole 232 and the contact brush screw mounting hole.

A wiper short-circuit line 210 made of a metal material, one end of which is welded to the fixed disk 230; one end of the short-circuit brush is welded on the short-circuit interface 212 of the contact brush, so that the short-circuit brush is in short-circuit connection with the aluminum wire side interface 200; the wiper short-circuit wire is wound around the slider 203 so that the wiper short-circuit wire has a moving section when the slider slides up and down and keeps short-circuit connection with the aluminum wire side interface 200.

In the sensing resistor module 20, the sensing resistor housing 340 is made of a material with good insulating property, is of a cylindrical structure, and is provided with sensing resistor

lower end threads

441a and 441b and sensing resistor

upper end threads

342a and 342b at the upper end and the lower end respectively; the lower end screw thread of the induction resistor and the upper end screw thread of the induction resistor are both internal threads, and the specification and the size are the same; the lower end screw thread of the induction resistor is tightly meshed with the

connection screw threads

214a and 214b of the induction resistor, and a sealing ring is added between the lower end screw thread and the connection screw threads during installation; the upper end screw thread of the induction resistor is tightly meshed with the mounting

screw threads

352a and 352b of the base of the shell, and a sealing ring is added in the middle during mounting.

The induction

electric group wires

301a and 301b are formed by exposed resistance wires and are surrounded on the inner wall of the induction resistance module; the upper end of the induction resistance wire is in short-circuit connection with the sliding resistor interface 300; the short brush 231 is short-circuited with the

induction resistance wires

301a and 301b, and the short brush 231 is short-circuited with the aluminum wire side interface 200 through the contact brush short-circuit line 210 and the embedded contact brush short-circuit line 213; when the sliding rod 203 slides up and down, the short circuit brush 231 is driven to slide up and down; when the short brush slides upwards, the length of the resistance wire between the short brush and the interface of the sliding resistor is shortened, and the resistance between the interface 300 of the sliding resistor and the interface 200 of the aluminum wire side is reduced; when the short brush slides downwards, the length of the resistance wire between the short brush and the interface of the sliding resistor is extended, and the resistance between the interface 300 of the sliding resistor and the interface 200 of the aluminum wire side is increased;

the shell base 302 is divided into a base support body 350 and a thread support body 351, the base support body and the thread support are made of engineering plastics with good insulating property, and an integral structure is molded by adopting a molding process; the base support body 350 and the threaded support body 351 are cylindrical and coaxial, and the diameter of the base support body is larger than that of the threaded support body; the outer side of the threaded support body is provided with external threads which are called as housing

base mounting threads

352a and 352b, the diameters of the external threads are consistent with those of the induction resistor

upper end threads

342a and 342b, and the external threads and the induction resistor upper end threads are tightly meshed.

See figures 15-17 of the drawings

The shunt module 80 is composed of a step-up transformer 812, a voltage dividing capacitor 811, a voltage dividing resistor 810, and a ground switch 813. The temperature control side interface 802 of the step-up transformer 812 is in short circuit connection with the steel core output interface 104; the secondary output interface 801 of the step-up transformer 812 is short-circuited with the output interface 3; the leakage current interface 806 of the step-up transformer 812 is connected in series with the divider resistor 810 and the grounding switch 813 in sequence; the grounding switch 813 is in short-circuit connection with the tower ground wire interface 4; the voltage dividing capacitor 811 is connected in parallel with the voltage dividing resistor 810. When ice melting is needed, the grounding switch 813 is closed, and two ends of the switch are short-circuited; when ice melting is not needed, the grounding switch 813 is opened, and the two ends of the switch are opened. The grounding switch 813 is a high-voltage isolating switch with model number GW9-12 of Zhejiang Kinggu electric company Limited.

The shunt transformer is a step-up transformer, and has two design modes: a double winding shunt transformer mode and an auto-shunt transformer mode. The double-winding shunt transformer is a transformer structure with two windings, which are respectively called 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 shunting low-voltage winding coil is less than that of the shunting high-voltage winding coil.

The autotransformer adopts an autotransformer structure, and only has one transformer winding, which is called as an autotransformer 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.

See figures 18 and 19

For A-phase, B-phase and C-phase power transmission lines: insulators are respectively installed on two sides of a cross arm of the tension tower of the power transmission line; and a tension-resistant clamp is arranged on the other side of the insulator.

The power transmission lead adopts a self-made heat conductor disclosed by CN201810370549.8, the A-phase outer conductor is aluminum stranded wires 607a1 and 607a2, and the inner conductor is steel cores 605a1 and 605a 2; the B-phase outer conductors are aluminum stranded wires 607B1 and 607B2, and the inner conductors are steel cores 605B1 and 605B 2; the C-phase outer conductors are aluminum stranded wires 607C1 and 607C2, and the inner conductors are steel cores 605C1 and 605C 2.

The right aluminum stranded wires 607a1, 607B1, 607C1 are respectively connected to 2A, 2B, 2C; the right side steel cores 605a1, 605B1, 605C1 are respectively connected to 1A, 1B, 1C; while the right side steel cores 605a1, 605b1, 605c1 are connected to the right side tension clamps 604a1, 604b1, 604c1, respectively. Right tension clamps 604a1, 604b1, 604c1 are connected to cross arm 601 by insulators 603a1, 603b1, 603c1, respectively. The left aluminum stranded wires 607a2, 607B2, 607C2 and the left steel cores 605a2, 605B2 and 605C2 are all connected to 3A, 3B and 3C. The left steel cores 605a2, 605b2, 605c2 are respectively connected to the left tension clamps 604a2, 604b2, 604c 2; left tension clamps 604a2, 604b2, 604c2 are connected to cross arm 601 by insulators 603a2, 603b2, 603c2, respectively.

It is assumed here that the electrical energy is transmitted from the right side to the left side, i.e. the right side is connected to the transmission end of the transmission line and the left side is connected to the reception end of the transmission line; if the right side is connected with the receiving end of the transmission line and the left side is connected with the sending end of the transmission line, the same effect can be achieved; the left and right steel cores are tightly connected to the tension-resisting clamp; for the A-phase, B-phase and C-phase power transmission lines, the steel core on the right side is in short-circuit connection with the input steel core interfaces 1A, 1B and 1C respectively; the right aluminum stranded wire is in short circuit connection with the input aluminum wire interfaces 2A, 2B and 2C; 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 interfaces

3A, 3B and 3C;

the steel cores of the self-made heat conducting wires on the left side and the right side are fixed by the tension-resistant clips, and the tension-resistant clips are fixed on the cross arm by the insulators.

Insulator mounting holes of the insulator hook are connected to the

vertical insulators

603d, 603e, 603f and 603g, and the other end of the vertical insulator is connected to the cross arm, so that the insulator hook is fixed to the cross arm.

The design parameters of the utility model are as follows: the outer diameter of a conductor outside a power transmission line connected with the single-phase resistance type passive anti-icing and de-icing control equipment for the tension tower is represented by Dw; the length of a self-made heat conducting wire between two strain towers provided with the device is represented by L; the inner conductor outer channel, denoted Dn; the self-made thermal conductor insulation layer thickness is expressed by dz; inner conductor resistivity, denoted by An; rated transmission current, denoted IA; rated transmission voltage: 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;

the shunt transformer can be in a double-winding shunt transformer mode or can be an autotransformer; the turn ratio of the two transformers is the same;

the value of the divider resistance is set to be RF,

when the utility model is implemented, the engineering plastic can adopt polyphenyl ether, and the conductive metal material can adopt copper.

When the three-phase passive anti-icing and de-icing resistor type control equipment is used, when the temperature of the temperature sensing steel core 103 rises, the oil temperature in the temperature sensing shell 110 rises, the volume expands after the oil temperature rises, the sliding rod 203 is pushed to slide upwards, the resistance between the sliding resistor interface 300 and the aluminum wire side interface 200 is reduced, the current of the temperature sensing steel core 103 is reduced, and the temperature of the temperature sensing steel core is reduced.

When the temperature of the temperature sensing steel core 103 is reduced, the oil temperature in the temperature sensing outer shell 110 is reduced, the volume of the oil is reduced after the oil temperature is reduced, and the sliding rod 203 is pushed to move downwards, so that the resistance between the sliding resistor interface 300 and the aluminum wire side interface 200 is increased, the current of the temperature sensing steel core 103 is increased, and the temperature of the temperature sensing steel core is increased.

By the method, the resistance value of the resistor between the sliding resistor interface 300 and the aluminum wire side interface 200 can be adjusted in a self-adaptive mode, so that the self-adaptive change of the heating value of the wire is controlled, and the intelligent ice melting effect is achieved.

In addition, during ice melting, the step-up transformer 812 raises the voltage, and further adjusts the power of ice melting, so that the ice melting effect is better.

Because the three-phase temperature sensing steel core 103 is placed in the transformer oil in the same temperature sensing shell 110, and the three-phase contact brush assemblies are driven by the same volume of the transformer oil, the three-phase resistors have the same variation direction, and are either simultaneously increased or simultaneously decreased; the three-phase ice melting power can be consistent, and the three-phase imbalance caused by the asynchronous three-phase ice melting power is avoided.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a three-phase passive anti-icing ice-melt resistance type controlgear which characterized in that: the control equipment consists of a temperature sensing module (10), a sensing resistor module (20), a protection resistor (40), a protection capacitor (50), a switch (60), a shunt module (80) and a change-over switch (21); for a three-phase alternating current transmission line, each phase is externally provided with four interfaces which are respectively an input steel core interface (1); an input aluminum wire interface (2); an output interface (3); a tower ground wire interface (4); the control equipment is connected with the power transmission line through an external interface: each phase is provided with a change-over switch, and two ends of each phase change-over switch (21) are respectively connected with the corresponding input aluminum wire interface (2) and the input steel core interface (1) in a short circuit way;

the temperature sensing module (10) has three sets of external connection interfaces, and each phase has a set: each group of external connection interfaces comprises a steel core side interface (100) and a steel core output interface (104); each phase of steel core side interface (100) is in short circuit connection with the phase of input steel core interface (1); each phase steel core output interface (104) is in short circuit connection with the temperature control side interface (802) of the phase shunt module (80);

the sliding resistance interface (300) is an external connection end of the induction resistance wires (301a, 301b), one for each phase, and is in short-circuit connection with the phase output interface (3);

each phase is provided with a protection resistor (40), a protection capacitor (50) and a change-over switch (60), and after the protection resistor (40) and the protection capacitor (50) of each phase are connected with the change-over switch (60) in parallel, one end of the protection resistor and the protection capacitor is in short-circuit connection with the phase output interface (3); the other end is in short circuit connection with the phase input aluminum wire interface (2);

the temperature sensing module (10) comprises a temperature sensing shell (110), an upper bottom cover (102), a lower bottom cover (105), a temperature sensing steel core (103), a temperature sensing slide bar seat (201), a slide bar guide pipe (202), a slide bar (203) and a contact brush (204); temperature sensing oil is sealed in the temperature sensing shell (110); a steel core side interface (100), a steel core output interface (104) and an aluminum wire side interface (200) are arranged on the temperature sensing module (10); the aluminum wire side interface (200) is in short circuit connection with the input aluminum wire interface (2);

the temperature sensing shell (110), the upper bottom cover (102) and the lower bottom cover (105) form a sensing shell component; the upper bottom cover (102) is provided with three mounting ports (1021); each mounting port (1021) is connected with a temperature sensing slide bar seat (201); each mounting opening (1021) is provided with an internal thread (165w, 165x) of the mounting opening;

the temperature sensing steel core (103), the inner fixing points (131a, 131b), the steel core output interface (104) and the steel core side interface (100) form a temperature sensing steel core assembly; the temperature sensing steel core assembly is provided with three groups of external connecting interfaces which correspond to the temperature sensing modules (10);

the temperature sensing slide bar seat assembly is composed of a temperature sensing slide bar seat (201), a slide bar conduit (202) and an embedded contact brush short-circuit line (213); the temperature sensing slide rod seat assembly is provided with a group corresponding to each mounting port (1021);

the sliding rod (203), the contact brush (204) and the contact brush short-circuit line (210) form a contact brush component; the contact brush assemblies are arranged in a group corresponding to each mounting port (1021);

three induction resistance modules (20) are provided, one for each phase; the induction resistance module (20) is composed of a shell base (302), induction resistance wires (301a, 301b), an induction resistance shell (340) and a sliding resistor interface (300);

three shunt modules (80) are provided, one for each phase; each phase current-dividing module (80) is composed of a boosting transformer (812), a voltage-dividing capacitor (811), a voltage-dividing resistor (810) and a grounding switch (813); the temperature control side interface (802) of each phase of the step-up transformer (812) is in short circuit connection with the phase steel core output interface (104); the secondary output interface (801) of each phase of the step-up transformer (812) is in short-circuit connection with the phase output interface (3); after the voltage dividing capacitor (811) is connected with the series voltage dividing resistor (810) in parallel, one end of the voltage dividing capacitor is in short-circuit connection with the leakage current interface (806) of the boosting transformer (812), and the other end of the voltage dividing capacitor is connected with one end of the grounding switch (813); one end of the grounding switch (813) is connected with one end of the voltage dividing capacitor (811) and the series voltage dividing resistor (810), the other end of the grounding switch is in short circuit connection with the ground wire side interface (803), and the ground wire side interface (803) is in short circuit connection with the tower ground wire interface (4).

2. The three-phase passive ice-melt prevention resistive control device of claim 1, wherein: in the temperature sensing module (10), a temperature sensing shell (110) is of a tubular structure and is made of a material with good insulating property, and mounting screw holes (154w, 154x, 154y and 154z) are formed in the outer side of the upper end of the tubular structure; the outer side of the lower end is also provided with an installation screw hole;

the lower bottom cover (105) is matched with an installation screw hole on the lower end surface of the temperature sensing shell (110) through a screw to be fixed at the lower end of the temperature sensing shell (110); the upper bottom cover (102) is fixed at the upper end of the temperature sensing shell (110) through the matching of screws and mounting screw holes on the upper end surface of the temperature sensing shell; a sealing gasket is arranged between the upper bottom cover (102) and the top surface of the temperature sensing shell (110), so that the upper bottom cover (102) and the temperature sensing shell (110) are sealed; a sealing gasket is arranged between the lower bottom cover (105) and the top surface of the temperature sensing shell (110) so that the lower bottom cover (105) and the temperature sensing shell (110) are sealed.

3. The three-phase passive ice-melt prevention resistive control device of claim 1, wherein: the temperature sensing shell (110) is provided with three steel core output mounting holes (151A, 151B and 151C) and three steel core side mounting holes (152A, 152B and 152C); the diameters of the steel core output mounting hole and the steel core side mounting hole are slightly larger than the diameter of the temperature sensing steel core, so that the temperature sensing steel core can penetrate through the temperature sensing steel core; the temperature sensing steel core is arranged on the pipe wall of the tubular shell through a steel core output mounting hole and a steel core side mounting hole, and the inside and the outside of the temperature sensing steel core are kept sealed by sealing gaskets (132a and 132 b); the middle section of the temperature sensing steel core (103) 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 (133a, 133 b); the steel core interface thread is an external thread and is used for being twisted with the connecting threads in the steel core output interface (104) and the steel core side interface (100); the material and the diameter of the temperature induction steel core (103) and the inner conductor steel core of the self-made heat conducting wire are completely the same; the external connecting sections at two ends of the temperature sensing steel core respectively penetrate through the steel core output mounting hole and the steel core side mounting hole, and the steel core interface threads at two ends are respectively meshed with the mounting internal threads of the steel core output interface (104) and the steel core side interface (100); the inner fixing points (131a, 131b) are discs welded on 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 (110) during installation;

the steel core output interface (104) and the steel core side interface (100) have the same structure; the steel core output interface (104) and the steel core side interface (100) are formed by welding a short circuit connection interface (147) and a hexagonal nut (146), and the short circuit connection interface (147) and the hexagonal nut (146) are made of metal materials; the short circuit connection interface is annular; the hexagonal nut is in a regular hexagon column shape, and the middle of the hexagonal nut is provided with an installation internal thread (145); the mounting internal threads (145) are matched with the steel core interface threads (133a, 133b) and are tightly meshed.

4. The three-phase passive ice-melt prevention resistive control device of claim 1, wherein: the temperature sensing slide rod seat (201) comprises three parts, namely sensing resistance connecting threads (214a and 214b), a slide rod seat body (221a and 221b) and sensing shell connecting threads (215a and 215 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 (202); the connecting thread of the induction resistor has the same major diameter as the connecting thread of the induction shell; the diameter of the temperature sensing slide rod seat bodies (221a and 221b) is larger than the major diameter of the connecting thread of the sensing shell; the induction resistance connecting threads (214a, 214b) and the induction shell connecting threads (215a, 215b) are external threads; the major diameter of the connecting thread of the induction shell is the same as that of the threads (165w, 165x) of the mounting port, the connecting threads (215a, 215b) of the induction shell are tightly meshed with the threads (165w, 165x) of the mounting port, and a sealing ring is added in the middle of the induction shell during meshing to seal the two threads; the major diameter of the connecting thread of the induction resistor is the same as that of the lower end threads (441a and 441b) of the induction resistor, and the connecting thread of the induction resistor is tightly meshed with the lower end threads of the induction resistor;

the slide bar conduit (202) 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 (203); 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 (222); the sliding rod (203) is arranged in the telescopic sliding chute and can slide in the telescopic sliding chute; the upper end of the slide bar conduit is provided with a conduit sealing groove (211a1, 211a2, 211b1, 211b2, 211c1, 211c 2); a sealing ring is added in the middle of the sealing groove of the guide pipe, so that when the sliding rod (203) slides up and down in the sliding rod guide pipe, the telescopic sliding chutes at two ends of the sealing ring are ensured to be sealed;

the embedded contact brush short circuit line (213) is made of metal material; the inductive resistor is embedded between the inductive resistor connecting thread and the sliding rod seat body; an aluminum wire side interface (200) and a contact brush short interface (212) are arranged at two ends; the aluminum wire side interface (200) is exposed out of the side surface of the slide bar seat body; the contact brush short interface (212) is exposed out of the upper end of the inductive resistor connecting thread;

the sliding rod guide pipe, the inductive resistor connecting thread, the sliding rod seat body and the inductive shell connecting thread are made of engineering plastics with good insulating property, are molded into a whole by adopting a molding process, and embed the embedded contact brush short-circuit line (213) in the middle.

5. The three-phase passive ice-melt and ice-prevention resistive control device of claim 1, wherein: in the contact brush component, a sliding rod (203) is cylindrical, the outer diameter of the sliding rod is slightly smaller than the inner diameter of a sliding rod guide pipe, the sliding rod can slide up and down in the sliding rod guide pipe and penetrates through sealing rings in the middle of guide pipe sealing grooves (211a1, 211a2, 211b1, 211b2, 211c1 and 211c2), so that the spaces at the upper end and the lower end of the sealing rings in the sliding rod guide pipe are kept sealed during sliding; the sliding rod is made of a material with good insulating property and is molded into a whole by adopting a die pressing process; the upper end of the sliding rod is provided with a contact brush screw mounting hole for fixing the contact brush;

the contact brush (204) is composed of a fixed disc (230) and a short-circuit brush (231); the fixed disc (230) and the short circuit brush (231) 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 a slide bar are fixed into a whole by screws through the slide bar mounting hole (232) and a contact brush screw mounting hole;

a contact brush short circuit line (210) which is made of metal material and one end of which is welded on the fixed disc (230); one end of the short circuit brush is welded on the contact brush short circuit interface (212) so that the short circuit brush is in short circuit connection with the aluminum wire side interface (200); the contact brush short-circuit wire is wound on the sliding rod (203), so that when the sliding rod slides up and down, the contact brush short-circuit wire has an active interval and keeps short-circuit connection between the contact brush and the aluminum wire side interface (200).

6. The three-phase passive ice-melt prevention resistive control device of claim 1, wherein: in the induction resistance module (20), an induction resistance shell (340) is made of a material with good insulating property and is of a cylindrical structure, and the upper end and the lower end of the induction resistance shell are respectively provided with induction resistance lower end threads (441a, 441b) and induction resistance upper end threads (342a, 342 b); the lower end screw thread of the induction resistor and the upper end screw thread of the induction resistor are both internal threads, and the specification and the size are the same; the lower end screw thread of the induction resistor is tightly meshed with the connection screw threads (214a, 214b) of the induction resistor, and a sealing ring is added between the lower end screw thread and the connection screw threads during installation; the upper end screw thread of the induction resistor is tightly meshed with the mounting screw threads (352a, 352b) of the base of the shell, and a sealing ring is added in the middle during mounting;

the induction electric group wires (301a, 301b) are composed of exposed resistance wires and surround the inner wall of the induction resistance module; the upper end of the induction resistance wire is in short-circuit connection with a sliding resistor interface (300); the short-circuit brush (231) is in short-circuit connection with the induction resistance wires (301a, 301b), and the short-circuit brush (231) is in short-circuit connection with the aluminum wire side interface (200) through the contact brush short-circuit line (210) and the embedded contact brush short-circuit line (213); when the sliding rod (203) slides up and down, the short circuit brush (231) is driven to slide up and down; when the short brush slides upwards, the length of the resistance wire between the short brush and the interface of the sliding resistor is shortened, and the resistance between the interface (300) of the sliding resistor and the interface (200) of the aluminum wire side is reduced; when the short brush slides downwards, the length of a resistance wire between the short brush and the interface of the sliding resistor is extended, and the resistance between the interface (300) of the sliding resistor and the interface (200) of the aluminum wire side is increased;

the shell base (302) is divided into a base support body (350) and a thread support body (351), the base support body and the thread support are made of engineering plastics with good insulating property, and an integral structure is molded by adopting a mold pressing process; the base support body (350) and the threaded support body (351) are both cylindrical and coaxial, and the diameter of the base support body is larger than that of the threaded support body; the outer side of the thread support body is provided with external threads, the external threads are consistent with the major diameters of threads (342a, 342b) at the upper ends of the induction resistors, and the external threads and the threads are tightly meshed.

7. The three-phase passive ice-melt prevention resistive control device of claim 1, wherein: when the tension tower is used and installed, horizontal insulators (603a1, 603a2, 603b1, 603b2, 603c1 and 603c2) and vertical insulators (603d, 603e, 603f and 603g) are respectively installed on two sides of a cross arm (601) of the tension tower of the power transmission line; installing tension-resistant clamps on the other sides of the insulators in the horizontal direction, fixing steel cores of the wires on the left side and the right side by using the tension-resistant clamps, and fixing the tension-resistant clamps on the cross arms by the insulators;

assuming that power is delivered from the right side to the left side; the three-phase input steel core interface (1) is respectively represented by 1A, 1B and 1C, the three-phase input aluminum wire interface (2) is respectively represented by 2A, 2B and 3C, and the three-phase output interface (3) is respectively represented by 3A, 3B and 3C; the right side steel cores (605a1, 605b1, 605c1) and the left side steel cores (605a2, 605b2, 605c2) are respectively and fixedly connected on the right side tension clip (604a1, 604b1, 604c1) and the left side tension clip (604a2, 604b2, 604c 2); the steel core (605a1, 605B1, 605C1) on the right side is short-circuited with the input steel core interface (1A, 1B, 1C); the right aluminum stranded wires (607a1, 607B1, 607C1) are in short circuit connection with the input aluminum wire interfaces (2A, 2B, 3C); after the steel cores (605a2, 605B2 and 605C2) on the left side and the aluminum stranded wires (607a2, 607B2 and 607C2) are short-circuited, the steel cores are connected with the output interfaces (3A, 3B and 3C) in a short-circuit mode; the single-phase resistance type passive anti-icing and de-icing control equipment for the tension tower is fixed on a cross arm of the tension tower of the power transmission line through a vertical insulator.

8. The three-phase passive ice-melt prevention resistive control device of claim 1, wherein: the outer diameter of a conductor outside a power transmission line connected with the single-phase resistance type passive anti-icing and de-icing control equipment for the tension tower is represented by Dw; the length of a self-made heat conducting wire between two strain towers provided with the device is expressed by L; the inner conductor outer diameter is denoted Dn; the inner conductor resistivity is represented by An; 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;

the shunt transformer is a step-up transformer, which

The divider resistance is set to be RF,

9. the three-phase passive ice-melt prevention resistive control device of claim 1, wherein: the outer wall of the temperature sensing shell (110) is provided with four insulator hooks (153w, 153x, 153y and 153 z); the insulator hook is cylindrical, and one half of the insulator hook is embedded into the temperature sensing shell (110) and forms a whole with the pipe wall of the temperature sensing shell (110); the other half of the insulator hook is exposed out of the outer side of the temperature sensing shell (110), and circular insulator mounting holes (155w, 155x) are formed in the exposed part; the insulator mounting hole is used for being mounted and fastened with the insulator.