CN206820436U - A kind of intelligent strain clamp of aerial earth wire - Google Patents

Abstract

The utility model discloses a kind of intelligent strain clamp of aerial earth wire, including wire clip body, conduction wire clamp, extension rod, draw ring, sensor, the wire clip body connects the conduction wire clamp, the wire clip body connects the extension rod, the extension rod connects the draw ring, for the sensor on the wire clip body, the sensor is used for the working condition for detecting the wire clip body.Intelligent strain clamp of the present utility model, the landing electric current of monitoring strain clamp, thunder-strike current, number of lightning strokes, operating temperature and gentle breeze vibration frequency and amplitude in real time, effective aerial ground wire disconnection fault of early warning, so as to take measures to avoid the generation of accident in advance.

Description

A kind of intelligent strain clamp of aerial earth wire

Technical field

The utility model belongs to field of electric power automation, and in particular to a kind of intelligent strain clamp of aerial earth wire.

Background technology

The widely used aerial ground wire protection power transmission cable of electric power transmission line, aerial earth wire are laid in overhead transmission line Top, ground wire bears the energy that is struck by lightning when being struck by lightning, and thunder-strike current is imported into underground by steel tower.Aerial earth wire It is connected by strain clamp with steel tower, thunder-strike current imports steel tower also through strain clamp and enters ground.

Aerial earth wire can cause stranded, and then initiation due to being influenceed by factors such as the injuring of thunder-strike current, gentle breeze vibrations Broken string, once aerial earth wire breaks, it will and drop on the power transmission line of lower section, cause power outage or more serious conductor cord disconnection Accident, and the probability that this kind of accident occurs is not low, it is very harmful, effective prophylactically detection means is there is no at present.

The ground wire of improper erection, very big earth current can be induced, high current can cause at strain clamp, wire fusing Fall, trigger accident.

Thunderbolt causes ground wire stranded, or the failure to break at suspension clamp is relatively common, and thunder is attacked aerial earth wire directly and broken The failure of line also happens occasionally.Such as 1) the fuel factor of lightning current, be struck by lightning aerial earth wire when, the highest current density of lightning strike spot, Temperature highest, the temperature of thunder and lightning arc is up to thousands of K；2) shock effect of lightning current, once thunder and lightning on the books rive century-old big tree and Armored concrete is hit to the phenomenon in one big hole, this explanation thunder and lightning has larger mechanical impact force (the i.e. impact effect of lightning current Should), when ground wire is by being struck by lightning, if the momentum of lightning surge is more than the momentum that ground wire is resistant to, ground wire will It is interrupted；3) fuel factor of power frequency short circuit current, thunderbolt aerial earth wire almost discharge while broken string along with insulator arc-over, Because the impedance (resistance) of the shaft tower system of ground wire one is much smaller than the shaft tower being grounded by lightning discharge, in the bar of lightning discharge ground connection Tower, most power frequency continued flow are diverted on aerial earth wire, aerial earth wire short circuit, and allow electric current small, and this is the aerial ground of thunderbolt The main reason for line breaks, and at suspension clamp be weak link, then it is easier to break；4) tension force of aerial earth wire is made under high temperature With the fuel factor of lightning current and power frequency short circuit current raises thunderbolt conductor temperature.At high temperature, the tensile strength of aerial earth wire Reduce, the fusion temperature of steel is 1560 DEG C.Due to the fuel factor of the fuel factor of lightning current, shock effect and power current and anti- Under the tension force collective effect for the aerial earth wire that tensile strength declines, aerial earth wire, which breaks, to fall.

Shown according to above-mentioned failure analysis report, disconnected strand of overhead grounding wire, generally occurred in the junction of strain clamp, it is former It is at vibrations stress build up at this that cause, which is, and thunder-strike current enters place, bears the heavy current impact of thunderbolt, can cause part strands Overheat and damage or weaken, the vibrations of long-time gentle breeze can cause metal fatigue and be broken.

The content of the invention

The purpose of this utility model is to provide a kind of intelligent strain clamp of aerial earth wire, and it is resistance to solve existing aerial earth wire Wire is because of gentle breeze vibrations at bracing cable folder and thunder-strike current enters to damage or reduction, easily makes the technical problems such as disconnected strand of overhead grounding wire.

To achieve the above object, the utility model uses following technical scheme：

A kind of intelligent strain clamp of aerial earth wire, including wire clip body, conduction wire clamp, extension rod, draw ring, sensor, The wire clip body connects the conduction wire clamp, and the wire clip body connects the extension rod, and the extension rod connects the drawing Ring, for the sensor on the wire clip body, the sensor is used for the working condition for detecting the wire clip body.

Intelligent strain clamp as described above, it is preferable that the sensor connects Wireless Telecom Equipment, is wirelessly transferred described The signal that sensor collection is collected into.

Intelligent strain clamp as described above, it is preferable that the Wireless Telecom Equipment is radio frequency, WIFI, BLUETOOTH Or ZIGBEE.

Intelligent strain clamp as described above, it is preferable that the sensor includes strain shock sensor and linear Hall Sensor, the strain shock sensor, the detection for vibrations；The linear hall sensor is used for the prison of thunder-strike current Survey.

Intelligent strain clamp as described above, it is preferable that one end of the strain shock sensor connection strain bridge, it is described The other end of strain bridge is pressed on wire by pulley.

Intelligent strain clamp as described above, it is preferable that the sensor also includes temperature sensor, the inspection for temperature Survey.

Intelligent strain clamp as described above, it is preferable that the sensor also includes Rogowski coil, for faradic Detection.

Intelligent strain clamp as described above, it is preferable that the sensor and the Wireless Telecom Equipment integrated monolithic machine, The single-chip microcomputer is provided with battery and antenna, completes information gathering, processing and communication.

Intelligent strain clamp as described above, it is preferable that battery uses solar energy charging battery or long life lithium batteries.

Intelligent strain clamp as described above, it is preferable that the single-chip microcomputer is provided with insulating shield.

Intelligent strain clamp as described above, it is preferable that the draw ring is U-shaped link.

Intelligent strain clamp provided by the utility model, the landing electric current, thunder-strike current, thunderbolt of strain clamp are monitored in real time Number, operating temperature and gentle breeze vibration frequency and amplitude, the aerial ground wire disconnection fault of effective early warning, arrange so as to take in advance Apply the generation for avoiding accident.

Brief description of the drawings

Fig. 1 is the structural representation of the preferred embodiment of the utility model one.

Fig. 2 is the theory diagram of the preferred embodiment of the utility model one.

Embodiment

It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase Mutually combination.Turn next to accompanying drawing and describe utility model in detail in conjunction with the embodiments.

Embodiment 1

The intelligent strain clamp of a kind of aerial earth wire, as shown in figure 1, including wire clip body 1, conduction wire clamp 11, extension rod 2nd, draw ring 3, sensor, wire clip body 1 connect conduction wire clamp 11, wire clip body connection extension rod 2, and extension rod 2 connects draw ring 3, For sensor on the wire clip body, sensor is used for the working condition for detecting strain clamp.In use, using sensor with Wireless Telecom Equipment is connected, and the signal that sensor collection is collected into is radioed into backstage, realizes that the working condition of wire clamp is online Monitoring.Wireless Telecom Equipment is to realize the function that is communicated with ground base station, and Wireless Telecom Equipment can be radio frequency, WIFI, BLUETOOTH, ZIGBEE, or the wireless communication module of other self-defined standards.

Sensor includes strain shock sensor and linear hall sensor 7, the strain shock sensor, for shaking Detection；The linear hall sensor is used for the monitoring of thunder-strike current.

Specifically, shock sensor is strained on the wire clip body, and as illustrated in fig. 1 and 2, one end of strain bridge 8 leads to Cross pulley 9 to be pressed on wire 4, the other end is fixed on wire clip body 1, and when wire 4 shakes, strain will focus on Herein, the vibrations are detected by strain shock sensor, are converted into vibration frequency and vibration amplitude signal, are set by radio communication It is standby, such as radio frequency, signal is wirelessly transferred backstage, background system analyzes the shockproofness and ground configurations intensity and the strength of materials Etc. characteristic, can give warning in advance metal fatigue.

Before ground loop is draw ring, linear hall sensor 7 (H) is installed, to detect thunderbolt pulse current, by analyzing thunder Current strength, number are hit, the ground wire that gives warning in advance is stranded, avoids accident.

The heating of strain clamp and air themperature, if the larger temperature difference, then on the ground wire of surface faulty hidden danger, it is necessary to and When investigate, temperature sensor T can be provided with wire clip body.If linear hall sensor detects thunder-strike current signal, together When temperature sensor detect wire clamp temperature rise again, this shows that ground wire by greater impact, will send pre-warning signal, avoid ground wire from breaking Split accident.

Further, Rogowski coil 6, i.e. current sensor are installed on wire clip body 1, on the one hand monitored by current sense Induced-current size, indirect lightning strike size of current on the other hand can be monitored by linear hall sensor, these data transfers To backstage, improper earth fault can be analyzed, the accident of high current fusing ground wire occurs caused by avoiding improper ground connection.

In order to facilitate the transmission of detection signal, by above-mentioned sensor, that is, shock sensor, Rogowski coil (electric current are strained Sensor), temperature sensor and Hall sensor and Wireless Telecom Equipment integrated monolithic machine (MCU), single-chip microcomputer is connected with battery With antenna 10, information gathering, processing and communication are completed.Battery can use solar energy charging battery or long life lithium batteries to supply Electricity.

In order to further protect single-chip microcomputer, increase the service life, be provided with insulating shield 5 in single-chip microcomputer, insulating shield 5 is adopted It is made of organic composite material, there is good insulating properties, ageing resistace and fire resistance, it is assemblied in single-chip microcomputer Outside, insulation protection can be played.

Draw ring can use U-shaped link, for being fastened with electric pole.

The utility model is using strain shock sensor, Rogowski coil (current sensor), linear hall sensor and temperature Sensor is spent, gathers the parameters such as gentle breeze vibrations, induced-current, thunder-strike current and the operating temperature of strain clamp, vibrations can be achieved Detection, induced-current detection, thunder-strike current and temperature detection monitoring；By quantitative analysis, realize that the running status of ground wire is online Monitoring, effective early warning aerial earth wire failure, can take measures in advance, avoid the generation of ground overhead line line-outage contingency.

It is described above, only it is preferred embodiment of the present utility model, is not that other forms are done to the utility model Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent The equivalent embodiment of change.But it is every without departing from the content of the technical scheme of the utility model, it is real according to technology of the present utility model Any simple modification, equivalent variations and the remodeling that confrontation above example is made, still fall within the guarantor of technical solutions of the utility model Protect scope.

Claims (10)

1. the intelligent strain clamp of a kind of aerial earth wire, it is characterised in that including wire clip body, conduction wire clamp, extension rod, drawing Ring, sensor, the wire clip body connect the conduction wire clamp, and the wire clip body connects the extension rod, the extension rod The draw ring is connected, for the sensor on the wire clip body, the sensor is used for the work for detecting the wire clip body Make state.

2. intelligent strain clamp as claimed in claim 1, it is characterised in that the sensor connects Wireless Telecom Equipment, nothing Line transmits the signal that the sensor collection is collected into.

3. intelligent strain clamp as claimed in claim 2, it is characterised in that the Wireless Telecom Equipment is radio frequency, WIFI, BLUETOOTH or ZIGBEE.

4. intelligent strain clamp as claimed in claim 3, it is characterised in that the sensor include strain shock sensor and Linear hall sensor, the strain shock sensor, the detection for vibrations；The linear hall sensor is used for the electricity that is struck by lightning The monitoring of stream.

5. intelligent strain clamp as claimed in claim 4, it is characterised in that the strain shock sensor connection strain bridge One end, the other end of the strain bridge are pressed on wire by pulley.

6. intelligent strain clamp as claimed in claim 5, it is characterised in that the sensor also includes temperature sensor, uses In the detection of temperature.

7. intelligent strain clamp as claimed in claim 6, it is characterised in that the sensor also includes Rogowski coil, is used for Faradic detection.

8. intelligent strain clamp as claimed in claim 6, it is characterised in that the sensor and the Wireless Telecom Equipment collection Into single-chip microcomputer, the single-chip microcomputer is provided with battery and antenna, completes information gathering, processing and communication.

9. intelligent strain clamp as claimed in claim 8, it is characterised in that battery uses solar energy charging battery or long-life Lithium battery.

10. intelligent strain clamp as claimed in claim 8 or 9, it is characterised in that the single-chip microcomputer is provided with insulating shield.