CN206990788U - A kind of major loop conduction rod for bushing type rheological test - Google Patents
A kind of major loop conduction rod for bushing type rheological test Download PDFInfo
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- CN206990788U CN206990788U CN201720718543.6U CN201720718543U CN206990788U CN 206990788 U CN206990788 U CN 206990788U CN 201720718543 U CN201720718543 U CN 201720718543U CN 206990788 U CN206990788 U CN 206990788U
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Abstract
It the utility model is related to a kind of major loop conduction rod for bushing type rheological test, the conducting of primary circuit is carried out by being connected with casing current transformer, realize bushing type rheological test, the major loop conduction rod includes power module, turn on control module, mechanical conduction module and Wiring module, casing cover of the conduction module respectively with power module and casing current transformer is connected, casing cover of the mechanical conduction module respectively with conducting control module and casing current transformer is connected, the Wiring module respectively with external power source, power module, turn on control module, casing current transformer connects with outside test instrument.Compared with prior art, the utility model has the advantages that automation performance is high, simple to operate, security performance is high and result of the test is accurate.
Description
Technical field
Large-scale power transformer bushing type rheology routine test field is the utility model is related to, is used for more particularly, to one kind
The major loop conduction rod of bushing type rheological test.
Background technology
Bushing type rheology (casing current transformer) is widely used in the power transformer of each voltage class, and its experiment will
Ask primary circuit to pass through sleeve pipe, be then passed through current transformer so as to form conducting.The characteristics of due to casing current transformer itself,
Contain a large amount of transformer oil in sleeve pipe, sleeve pipe two end cover plate can not be opened simultaneously, how fast and accurately to complete current transformer
The ON operation of primary circuit during experiment, turn into a big headache problem of testing crew.
The electric power enterprises such as Shanghai at present, Jiangsu, Jiangxi are using traditional casing current transformer experiment major loop conducting
Method：Stretched into 2 experimenters in testing ground by one piece of ground connection band iron or long metal bar in sleeve pipe, pound the pipe that conforms to a conventional pattern
Lid paint so that ground connection band iron or long metal bar, sleeve cover contact so that with universal meter measure electric current it is mutual
The method whether major loop of sensor experiment turns on.Testing crew will take a significant amount of time and energy is turning on the work of major loop
On work, actually spend and had been over just in the time of the medium-and-large-sized major loop conducting of bushing type rheology of extra-high voltage project
The time of formula experiment.Therefore development one kind is needed to meet test measurement required precision, it is safe easily and fast, being accurately particularly
On the basis of complete major loop ON operation novel sleeve type rheological test with major loop turn on instrument.
Utility model content
The purpose of this utility model is to provide a kind of major loop for bushing type rheological test regarding to the issue above to turn on
Bar.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of major loop conduction rod for bushing type rheological test, carried out once by being connected with casing current transformer
The conducting in loop, realizes bushing type rheological test, and the major loop conduction rod includes：
Power module, for being powered for major loop conduction rod；
Control module is turned on, the casing cover with power module and casing current transformer is connected respectively, for detecting whether
Complete the conducting of primary circuit；
Mechanical conduction module, it is connected respectively with turning on the casing cover of control module and casing current transformer, for leading
The testing result of logical control module carries out the conducting of primary circuit when being no；
Wiring module, tried respectively with external power source, power module, conducting control module, casing current transformer and outside
Instrument connection is tested, for transmitting the complete loops of external voltage and forming sleeves formula rheological test to power module.
The conducting control module includes：
Conduction detection circuit, it is connected respectively with power module, the casing cover of casing current transformer and mechanical conduction module,
For detecting whether complete the conducting of primary circuit；
Turn-on control circuit, it is connected with power module, conduction detection circuit and mechanical conduction module, is led for basis respectively
The testing result of logical detection circuit sends control signal, the working condition of control machinery conduction module to mechanical conduction module.
The conduction detection circuit includes the turn-on transistor and auxiliary reclay that are sequentially connected, the turn-on transistor with
Power module is connected, and the auxiliary reclay is connected with turn-on control circuit, when not turned in primary circuit, three poles of the conducting
Pipe ends, and the auxiliary reclay is disconnected, and when being turned in primary circuit, the turn-on transistor is led with auxiliary reclay, machinery
Logical module, casing cover and power module collectively form loop, the auxiliary reclay closure.
The conduction detection circuit also includes light emitting diode, when the light emitting diode turns in primary circuit, with machine
Tool conduction module, casing cover and power module collectively form loop, in luminance.
The turn-on control circuit includes the first switch and second switch of series connection, and the first switch connects with power module
Connect, the second switch is connected with conduction detection circuit and mechanical conduction module respectively, and the second switch is according to conduction detection
The testing result of circuit, close when primary circuit does not turn on, disconnected when primary circuit turns on.
The mechanical conduction module includes：
Motor, it is connected with conducting control module, is realized once for being produced according to the testing result of conducting control module
The power of the conducting in loop；
Drill bit, it is connected with casing cover, for boring brokenly the insulating barrier of casing cover so as to realizing the conducting of primary circuit；
Brush is linked, is connected respectively with motor, drill bit and conducting control module, it is logical for being formed with conducting control module
Whether road, auxiliary conducting control module detection primary circuit turn on.
The power module includes：
Externally fed terminals, it is connected by Wiring module with external power source, for receiving the voltage of outside offer；
Transformer, it is connected respectively with externally fed terminals and conducting control module, for externally fed wiring to be terminated
The voltage of receipts is changed into the operating voltage of conducting control module, for conducting control module power supply；
Battery, respectively with transformer and conducting control module power supply, the dump energy provided for storing external power source,
And powered when externally fed terminals are not connected with external power source for conducting control module.
The power module also includes mu balanced circuit, and the mu balanced circuit connects with transformer and conducting control module respectively
Connect.
The Wiring module includes：
Power interface, it is connected with power module and external power source, is provided for transmitting external power source to power module respectively
Electric energy；
Outside test instrument terminals, are connected with outside test instrument, the complete loops for forming sleeves formula rheological test；
Turn on control module terminals, respectively with conducting control module and casing current transformer be connected, for conducting
Control module forms path, and whether auxiliary conducting control module detection primary circuit turns on.
The major loop conduction rod also includes the hollow insulation body of rod, the power module, conducting control module, machinery conducting
Module and Wiring module may be contained within the inside of the hollow insulation body of rod, the mechanical conduction module positioned at the hollow insulation body of rod the
One end, the power module, conducting control module and Wiring module are respectively positioned on the second end of the hollow insulation body of rod.
Compared with prior art, the utility model has the advantages that：
(1) Wiring module is coordinated to be powered for mechanical conduction module by power module, so that mechanical conduction module exists
Working condition go down decannulation current transformer casing cover on insulating barrier, simultaneously turning on control module can insulate automatically
Layer is removed rear control machinery conduction module and is stopped, and reduces working strength and work of the testing crew on conducting major loop
Make the time, automaticity is high.
(2) conducting control module includes conduction detection circuit and turn-on control circuit, is returned by conduction detection electric circuit inspection
Whether road turns on, and by turning on control module to the working condition of control machinery conduction module, is realized by the cooperation of the two
The Automatic Control of mechanical conduction module, without artificial monitoring.
(3) conduction detection circuit is realized by auxiliary reclay and turn-on transistor, whether can be with by the break-make in loop
Realize whether insulating barrier is removed complete judgement on casing cover, and detection method is simple and is easily achieved, and practical performance is strong.
(4) also include light emitting diode on conduction detection circuit, can directly pass through luminous two when primary circuit turns on
Pole pipe prompting testing crew loop has turned on, and is easy to testing crew to differentiate, while occurs and casing cover contact point mistake in conduction rod
When position is scratched and causes the major loop to disconnect, the instruction of the light emitting diode can also be relied on to return to conducting origin.
(5) turn-on control circuit includes the first switch and second switch of series connection, and artificial return is realized by first switch
Road conducting control, realize that the break-make under automatic detection result controls by second switch, by the two common cooperation, realize automatic
The break-make control that change degree is high and security performance is high.
(6) mechanical conduction module includes motor, drill bit and link brush, coordinates drill bit to make a return journey decannulation by motor
The insulating barrier covered, the working strength of staff is alleviated, path is formed with conducting control module by linking brush, so as to
Realize the detection function whether conducting control module turns on to loop.
(7) power module includes externally fed terminals, transformer and battery, and externally fed terminals coordinate transformer
Can realize the externally fed of major loop conduction rod, and battery is by storing electric energy, in external cabling inconvenience, directly based on
Loop conduction rod power supply, power supply mode is flexible, practical.
(8) power module also includes mu balanced circuit, provides stable voltage for conducting control module, improves the master and return
The job stability and operating accuracy of road conduction rod.
(9) Wiring module includes power interface, outside test instrument terminals and conducting control module terminals, can be direct
The main electrical scheme of the test instrument of current transformer is switched in this major loop conduction rod, wiring is simple, easy to operate, is easy to sleeve pipe
The progress of formula rheological test.
(10) outside of major loop conduction rod is the hollow insulation body of rod, and inside uses 12V DC ON operation voltage, and 5V is straight
The disconnected detection voltage of circulation, the Electrical Safety regulation in national grid safety work order under particular surroundings is complied fully with, it is many-sided
Prevent Danger Electric shock risk factor, it is safe.
Brief description of the drawings
Fig. 1 is the cut-away view of major loop conduction rod；
Fig. 2 is the external structure of major loop conduction rod；
Fig. 3 is the structural representation of power module；
Fig. 4 is the structural representation of mechanical conduction module；
Fig. 5 is the structural representation of Wiring module；
Fig. 6 is the schematic diagram of conduction detection circuit；
Fig. 7 is the schematic diagram of turn-on control circuit
Wherein, 1 is power module, and 2 be conducting control module, and 3 be mechanical conduction module, and 5 be outside test instrument, and 11 be change
Depressor, 12 be battery, and 13 be mu balanced circuit, and 21 be auxiliary reclay, and 22 be turn-on transistor, and 23 be light emitting diode, 24
It is motor for voltage-regulator diode, 31,32 be drill bit, and 33 be link brush, and 41 be power interface, and 42 be outside test instrument wiring
End, 43 be conducting control module terminals.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
The present embodiment provide a kind of major loop conduction rod for bushing type rheological test, by with casing current mutual inductance
Device connection carries out the conducting of primary circuit, realizes bushing type rheological test, the major loop conduction rod includes：Power module 1, is used for
Powered for major loop conduction rod；Control module 2 is turned on, the casing cover with power module 1 and casing current transformer is connected respectively,
For controlling whether the conducting of progress primary circuit；Mechanical conduction module 3, it is mutual with conducting control module 2 and casing current respectively
The casing cover connection of sensor, for carrying out the conducting of primary circuit under the control of conducting control module 2；Wiring module, respectively
It is connected with external power source, power module 1, conducting control module 2, casing current transformer and outside test instrument 5, for power supply
Module 1 transmits the complete loops of external voltage and forming sleeves formula rheological test.
Wherein, conducting control module 2 includes：Conduction detection circuit, respectively with power module 1, casing current transformer
Casing cover and mechanical conduction module 3 connect, for detecting whether completing the conducting of primary circuit；Turn-on control circuit, respectively with
Power module 1, conduction detection circuit and mechanical conduction module 3 connect, for being controlled according to the testing result of conduction detection circuit
The working condition of mechanical conduction module 3.Conduction detection circuit includes the turn-on transistor 22 and auxiliary reclay 21 being sequentially connected,
Turn-on transistor 22 is connected with power module, and auxiliary reclay 21 is connected with turn-on control circuit, when not turned in primary circuit,
Turn-on transistor 22 ends, and auxiliary reclay 21 disconnects, when being turned in primary circuit, turn-on transistor 22 and auxiliary reclay
21st, mechanical conduction module, casing cover and power module collectively form loop, and auxiliary reclay 21 closes, to turn-on control circuit
Second switch produce attraction so that second switch disconnect.Conduction detection circuit also includes light emitting diode 23, light-emitting diodes
When pipe 23 turns in primary circuit, loop is collectively formed with mechanical conduction module 3, casing cover and power module 1, in luminous shape
State, while the both ends of auxiliary reclay 21 are connected with voltage-regulator diode 24, in mechanical conduction module 3 conducting casing cover insulating barrier
During, drill bit rotates the electric break-make that can form high frequency when peeling insulating barrier off with sleeve shell, causes auxiliary reclay 21 to exist
Moment it is multiple electric and dead electricity, reverse voltage-regulator diode 24 in parallel, can prevent the both sides of auxiliary reclay 21 from overvoltage occur,
Auxiliary reclay 21 is avoided to burn out.Turn-on control circuit includes the first switch and second switch of series connection, first switch and electricity
Source module 1 is connected, and second switch is connected with conduction detection circuit and mechanical conduction module 3 respectively, and second switch is examined according to conducting
The testing result of slowdown monitoring circuit, close when primary circuit does not turn on, disconnected when primary circuit turns on.Mechanical conduction module 3 is wrapped
Include：Motor 31, it is connected with conducting control module 2, is once returned for producing realization according to the testing result of conducting control module 2
The power of the conducting on road；Drill bit 32, is connected with casing cover, for boring brokenly the insulating barrier of casing cover so as to realizing leading for primary circuit
It is logical；Brush 33 is linked, is connected respectively with motor 31, drill bit 32 and conducting control module 2, for turning on the structure of control module 2
Into path, auxiliary conducting control module 2 detects whether primary circuit turns on.Power module 1 includes：Externally fed terminals, lead to
Cross Wiring module to be connected with external power source, for receiving the voltage of outside offer；Transformer 11, respectively with externally fed terminals
Connected with conducting control module 2, the voltage for externally fed terminals to be received is changed into the work electricity of conducting control module 2
Pressure, powered for conducting control module 2；Battery, it is connected respectively with transformer 11 and conducting control module 2, for storing outside
The dump energy that power supply provides, and powered when externally fed terminals are not connected with external power source for conducting control module 2.Electricity
Source module 1 also includes mu balanced circuit, and mu balanced circuit is connected with transformer 11 and conducting control module 2 respectively.Wiring module includes：
Power interface 41, it is connected respectively with power module 1 and external power source, for transmitting the electricity of external power source offer to power module 1
Energy；Outside test instrument terminals 42, it is connected with outside test instrument 5, the complete loops for forming sleeves formula rheological test；Conducting
Control module terminals 43, it is connected respectively with conducting control module 2 and casing current transformer, for turning on control module 2
Path is formed, auxiliary conducting control module 2 detects whether primary circuit turns on.Major loop conduction rod also includes hollow insulating bar
Body, power module 1, conducting control module 2, mechanical conduction module 3 and Wiring module may be contained within the inside of the hollow insulation body of rod,
Positioned at the first end of the hollow insulation body of rod, power module 1, conducting control module 2 and Wiring module are respectively positioned on mechanical conduction module 3
Second end of the hollow insulation body of rod.
According to said structure, the internal structure and external structure for the major loop conduction rod realized in the present embodiment are respectively as schemed
Shown in 1 and Fig. 2, the cylindrical object in Fig. 2 is the hollow insulation body of rod, concrete structure such as Fig. 1 inside hollow insulating bar body
Shown, the internal structure is mainly by power module 1, conducting control module 2, mechanical conduction module 3 and the part group of Wiring module four
Into.
For the concrete structure of power module 1 as shown in figure 3, civil power 220V passes through transformation, rectification obtains 12V secondary directs electricity
Source.12V DC power supply can charge to battery simultaneously, be powered to operating electrical part；, can be by when being inconvenient to use 220V civil powers
12V DC battery is powered to operating electrical part, is gone out for testing crew, is brought convenience to substation field work, simultaneously
Control module is turned on due to the presence of mu balanced circuit in power module, employs the power supply of 5V direct current detection voltage backs, inside uses 12V
Direct current ON operation voltage, 5V direct currents break-make detection voltage, is complied fully with national grid safety work order under particular surroundings
Electrical Safety regulation, ensure that the safety of device.
Mechanical conduction module 3 is as shown in figure 4, mainly by 12V DC motor 31, drill bit 32, also most important chain
Connect brush 33 to form, formed and be electrically connected with motor shaft in motor one brush of anterior setting, for the broken sleeve pipe electricity of the increase brill of drill bit 32
Current transformer lid paint when and lid contact area, the larger drill bit in the present embodiment Choice of Bits obtuse angle.
Wiring module is as shown in figure 5, be provided with 3 patch jacks, as shown in figure 4,41 be the power input of this conduction rod
Socket；42 be the first pole terminals of current transformer test instrument, and 43 be the exit of this conduction rod conduction detection functional loop,
It is connected to sleeve shell.
As shown in Figure 6 and Figure 7, the conducting control module 2 includes conduction detection circuit to the concrete structure of conducting control module 2
(Fig. 6) and turn-on control circuit (Fig. 7), presses K1, loop conducting as seen from Figure 7, during work, and 12V DC motor is bored
Cut paintwork.K2 is the disconnected node in loop, is bored and broken to paint by conduction detection electric circuit inspection, drill bit 32 well connects with lid
Signal and disconnected after touch, leave the motor off work；In Fig. 6, the conduction detection circuit is carried out with linking the grade of brush 33 part
Connection, link brush 33 are arranged on front side of the main shaft of motor 31, real by the structure and main shaft of similar motor brush with main shaft
Existing electrical circuit connection, using the main shaft of dc motor 31, drill bit 32, also lid connect after paint is damaged in itself, then lead to
The structure of link brush 33 is crossed, realizes the passage of electric signal, using this passage, break-make measure loop is achieved, CT experiments
The major loop of instrument is turned on, the 5V power supplys come out through mu balanced circuit (being chopper circuit in the present embodiment), is bored in drill bit 32 broken
Whole loop conducting, the energized action of auxiliary reclay 21, K2 normally closed contacts is disconnected, electric motor loop dead electricity, shown brokenly after paint
Lacquerer has terminated, and is automatically stopped work；LED is bright simultaneously, shows that major loop has turned on, and can start CT experiments.
The mode of connection of major loop conduction rod at work is specially：First pole terminals of current transformer test instrument
Connector socket accesses the first pole of test wire, and the first pole is connected to sleeve shell, is equally to turn on master using linking brush 33
Loop, brush 33 will be linked and be placed in the front rather than rear of the main shaft of motor 31, accordingly even when motor after being stopped
There is the presence of surplus excitation electric field inside it, also do not interfere with the first pole, the loop of the second pole conducting, so simple knot
The improvement of structure position, influence of the uncertain factor to test loop is avoided, improve the accuracy of test data.
It is as follows the step of using the major loop conduction rod to turn on CT test instrument primary circuits according to the above-mentioned mode of connection：
S1 with wire control module terminals 43 will) be turned on, i.e. negative terminal mouth (the power failure machine terminals after conducting of conduction detection
Son) it is connected on sleeve pipe, form and be electrically connected with the shell of sleeve pipe；
S2) with wire by outside test instrument terminals 42, i.e. CT test '+' binding posts are connected to the on CT test instruments
One end；
S3) conduction rod is slowly put into it from the sleeve upper end taken apart, the drill bit 32 at the top of conduction rod is touched set
The cover plate that pipe opposite side is not switched on；
S4) press conduction rod motor power button and start conduction rod, now working power indicator lamp lights；
S5 the motor control button for starting ON operation) is pressed, conduction rod can complete ON operation in 2~5S, treat back
Road conducting indicator lamp lights, and motor decontrols button after stopping；
S6) step s5) in loop conducting lighting for indicator lamp show that the major loop ON operation of CT test instruments has been completed,
The second end of CT test instruments is connected on sleeve pipe with wire, forms and is electrically connected with the shell of sleeve pipe, next can open
CT test instruments, carry out arrange parameter by the test operation explanation of test instrument and tested.
Claims (10)
1. a kind of major loop conduction rod for bushing type rheological test, once returned by being connected with casing current transformer
The conducting on road, realize bushing type rheological test, it is characterised in that the major loop conduction rod includes power module, conducting control
Module, mechanical conduction module and Wiring module, the conduction module respectively with power module and the sleeve pipe of casing current transformer
Lid connection, casing cover of the mechanical conduction module respectively with conducting control module and casing current transformer is connected, described to connect
Wire module is connected with external power source, power module, conducting control module, casing current transformer and outside test instrument respectively.
2. the major loop conduction rod according to claim 1 for bushing type rheological test, it is characterised in that the conducting
Control module includes conduction detection circuit and turn-on control circuit, the conduction detection circuit respectively with power module, casing cover
Connected with mechanical conduction module, the turn-on control circuit respectively with power module, conduction detection circuit and mechanical conduction module
Connection.
3. the major loop conduction rod according to claim 2 for bushing type rheological test, it is characterised in that the conducting
Detection circuit includes the turn-on transistor and auxiliary reclay being sequentially connected, and the turn-on transistor is connected with power module, institute
Auxiliary reclay is stated to be connected with turn-on control circuit, when not turned in primary circuit, the turn-on transistor cut-off, the centre
Relay disconnects, when turn in primary circuit, the turn-on transistor and auxiliary reclay, mechanical conduction module, casing cover and
Power module collectively forms loop, the auxiliary reclay closure.
4. the major loop conduction rod according to claim 3 for bushing type rheological test, it is characterised in that the conducting
Detection circuit also includes light emitting diode, when the light emitting diode turns in primary circuit, with mechanical conduction module, casing cover
Loop is collectively formed with power module, in luminance.
5. the major loop conduction rod according to claim 2 for bushing type rheological test, it is characterised in that the conducting
Control circuit includes the first switch of series connection and second switch, the first switch are connected with power module, the second switch
It is connected respectively with conduction detection circuit and mechanical conduction module, the second switch closes when primary circuit does not turn on, one
Minor loop disconnects when turning on.
6. the major loop conduction rod according to claim 1 for bushing type rheological test, it is characterised in that the machinery
Conduction module includes motor, drill bit and link brush, and the motor is connected with conducting control module, the drill bit and sleeve pipe
Lid connection, the link brush are connected with motor, drill bit and conducting control module respectively.
7. the major loop conduction rod according to claim 1 for bushing type rheological test, it is characterised in that the power supply
Module includes externally fed terminals, transformer and battery, and the externally fed terminals pass through Wiring module and external electrical
Source connect, the transformer respectively with externally fed terminals and turn on control module be connected, the battery respectively with transformation
Device connects with conducting control module.
8. the major loop conduction rod according to claim 7 for bushing type rheological test, it is characterised in that the power supply
Module also includes mu balanced circuit, and the mu balanced circuit is connected with transformer and conducting control module respectively.
9. the major loop conduction rod according to claim 1 for bushing type rheological test, it is characterised in that the wiring
Module include power interface, outside test instrument terminals and conducting control module terminals, the power interface respectively with power supply
Module is connected with external power source, and the outside test instrument terminals are connected with outside test instrument, the conducting control module wiring
End is connected with conducting control module and casing current transformer respectively.
10. the major loop conduction rod according to claim 1 for bushing type rheological test, it is characterised in that the master
Loop conduction rod also includes the hollow insulation body of rod, the power module, conducting control module, mechanical conduction module and Wiring module
The inside of the hollow insulation body of rod is may be contained within, the mechanical conduction module is positioned at the first end of the hollow insulation body of rod, the power supply
Module, conducting control module and Wiring module are respectively positioned on the second end of the hollow insulation body of rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720718543.6U CN206990788U (en) | 2017-06-20 | 2017-06-20 | A kind of major loop conduction rod for bushing type rheological test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720718543.6U CN206990788U (en) | 2017-06-20 | 2017-06-20 | A kind of major loop conduction rod for bushing type rheological test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206990788U true CN206990788U (en) | 2018-02-09 |
Family
ID=61396777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720718543.6U Expired - Fee Related CN206990788U (en) | 2017-06-20 | 2017-06-20 | A kind of major loop conduction rod for bushing type rheological test |
Country Status (1)
| Country | Link |
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| CN (1) | CN206990788U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167756A (en) * | 2017-06-20 | 2017-09-15 | 上海送变电工程公司 | A kind of major loop conduction rod for bushing type rheological test |
-
2017
- 2017-06-20 CN CN201720718543.6U patent/CN206990788U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167756A (en) * | 2017-06-20 | 2017-09-15 | 上海送变电工程公司 | A kind of major loop conduction rod for bushing type rheological test |
| CN107167756B (en) * | 2017-06-20 | 2023-07-21 | 上海送变电工程公司 | Main loop guide rod for sleeve type rheological test |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180209 Termination date: 20200620 |