CN108414576B - NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe and method - Google Patents
NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe and method Download PDFInfo
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- CN108414576B CN108414576B CN201810047435.XA CN201810047435A CN108414576B CN 108414576 B CN108414576 B CN 108414576B CN 201810047435 A CN201810047435 A CN 201810047435A CN 108414576 B CN108414576 B CN 108414576B
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
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Abstract
The invention discloses a kind of NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe and method, the probe includes that winding is attached at the external detection probe module of aluminum pipe outer wall border and the built in test probe module being placed in inside steel drift-bolt gaging hole；By the rubber of strip, metal-rubber module that is identical with the parameter of rubber long side bottom three is fixed on and equidistantly arranging forms external detection probe module, each metal-rubber module passes through conducting wire and is connected with impedance analyzer, rubber two sides are fixed with buckle, adhere well to aluminum pipe convenient for external detection probe module；Built in test probe module is made of the metal-rubber probe that is connected and the lead with plastic shell, and is connected by conducting wire with impedance analyzer；The present invention also provides the detection method of above-mentioned probe, NY hydraulic strain clamp aluminum stranded conductor crimp quality can be carried out to detect quickly, in high precision, there is important engineering application value.
Description
Technical field
The invention belongs to technical field of nondestructive testing, and it is online to be related to a kind of NY hydraulic strain clamp aluminum stranded conductor crimp quality
Detection probe and method.
Background technique
High voltage power transmission is the major way of modern electric long-distance sand transport, and strain clamp is as important electric armour clamp in height
It is widely applied in power grid construction.Strain clamp should bear transmission of electricity line tension, play the role of overcurrent again.Due to high wind, shake
Dynamic to wait complicated field work environment, strain clamp loosens, and causes aluminum stranded conductor crimp quality to decline, will cause strain clamp
Local pyrexia damage wires, even go offline accident, seriously affects the safety of transmission line of electricity, therefore to strain clamp aluminum stranded conductor pressure
It is very necessary to connect quality progress on-line checking.
Strain clamp loosens, and is presented as the decline of aluminum stranded conductor crimping pressure, meanwhile, aluminum stranded conductor connects with connecting aluminum pipe
Electric shock resistance also will increase.Therefore, it is expected to through detection aluminum stranded conductor and connects the contact resistance realization aluminum stranded conductor crimp quality of aluminum pipe
Detection.
Summary of the invention
In order to solve the above-mentioned problems of the prior art, it is an object of the invention to propose a kind of NY hydraulic strain insulator
Wire clamp aluminum stranded conductor crimp quality on-line checking probe and method, can to NY hydraulic strain clamp aluminum stranded conductor crimp quality into
The fast and accurate on-line checking of row, has important engineering application value.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe, including winding are attached at outside aluminum pipe 12
The external detection probe module 2 of wall border and the built in test probe module 1 being placed in inside 11 detection hole of steel anchor；Institute
It is identical with the rubber parameter of 8 long side bottom three is fixed on by the rubber 8 of strip to state external detection probe module 2
And the metal-rubber module composition equidistantly arranged, it is the first metal-rubber module 5, the second metal-rubber module 6 and the respectively
Three metal-rubber modules 7, when the winding of external detection probe module 2 is attached at 12 outer wall border of aluminum pipe, the first metal-rubber
Module 5, the second metal-rubber module 6 and third metal-rubber module 7 contact 12 outer wall of aluminum pipe；The first metal-rubber module
5, the second metal-rubber module 6 and third metal-rubber module 7 are connected by multiple equidistant tie points with conducting wire, Jin Erlian
Connect impedance analyzer 14；8 two sides of rubber are fixed with buckle 13, adhere well to aluminium convenient for external detection probe module 2
12 outer wall of pipe；Built in test probe module 1 is made of the metal-rubber probe 3 and lead 4 being connected, and passes through conducting wire and resistance
Analysis resistant instrument 14 is connected, and 3 outer wall of metal-rubber probe guarantees its steel core 9 with strain clamp with circumferential insulating layer
Insulation, the lead 4 have plastic shell.
The detection method of the NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe, including NY hydraulic
The foundation of strain clamp aluminum stranded conductor crimping stress calibration curve and quantifying for NY hydraulic strain clamp aluminum stranded conductor crimp quality are commented
Estimate；
(1) foundation of NY hydraulic strain clamp aluminum stranded conductor crimping stress calibration curve, the specific method is as follows:
Crimping operation is carried out to 10 groups of aluminum pipe 12 and 10 group aluminum stranded conductors 10 using hydraulic press respectively, every group of pressure is respectively to set
Count 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and the 100% of pressure；Built in test is popped one's head in
Module 1 is fixed in the detection hole of steel anchor 11, and comes into full contact with metal-rubber probe 3 with aluminum stranded conductor 10, and external is detected
Probe module 2 is fixed on 12 outer wall of aluminum pipe, make external detection probe module 2 and lead 4 far from 10 one end of aluminum stranded conductor at a distance from
For l；First metal-rubber module 5, the second metal-rubber module 6 and third metal-rubber module 7 are separately connected impedance analysis
First passage, second channel and the third channel of instrument 14, and built in test probe module 1 is connect with impedance analyzer 14,
Detection set of frequency is 100Hz；When crimping pressure be the 10% of design pressure, first passage, second channel and third channel
Impedance real part R11、R12And R13, average impedance real part is R1=(R11+R12+R13)/3 are obtained under other crimping pressure operating conditions with this
Average impedance real part R2、R3……R10；With design pressure 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%,
90% and 100% is ordinate, with average impedance real part R1、R2、R3…… R10For abscissa, crimping pressure and average resistance are obtained
The invariance curve of anti-real part carries out linear fit to the curve and obtains fitting formula P=aR+b, and wherein P is crimping pressure, and R is flat
Equal impedance real part, a and b are respectively the slope and intercept of fitting formula；
(2) qualitative assessment of NY hydraulic strain clamp aluminum stranded conductor crimp quality, the specific method is as follows:
Built in test probe module 1 is fixed in the detection hole of steel anchor 11 of strain clamp to be measured, and makes metal rubber
Glue probe 3 and the aluminum stranded conductor 10 of strain clamp to be measured come into full contact with, and external detection probe module 2 is fixed on resistance to bracing cable to be measured
12 outer wall of aluminum pipe of folder makes external detection probe module 2 with lead 4 far from 10 one end distance l of aluminum stranded conductor；By the first gold medal
Belong to rubber module 5, the second metal-rubber module 6 and third metal-rubber module 7 be separately connected impedance analyzer first passage,
Second channel and third channel, and built in test probe module 1 is connect with impedance analyzer 14, detection set of frequency is
100Hz；The average impedance real part of first passage, second channel and third channel is Rn, by RnIt substitutes into P=aR+b and obtains aluminum stranded conductor pressure
Connect pressure.
The present invention is compared to the prior art compared with having following advantage:
1, present invention probe can guarantee that detection probe and strain clamp come into full contact with using metal-rubber, reduces detection and visits
Error caused by head changes with strain clamp contact resistance；Since the material of external detection probe module is rubber and metal rubber
Glue has elasticity, suitable for the continued access aluminum pipe of sizes, has versatility.
2, the detection method that the present invention pops one's head in can realize the online inspection of the quick of strain clamp aluminum stranded conductor crimp quality, high-precision
It surveys, easily operated, cost price is low, industrial application value with higher.
Detailed description of the invention
Fig. 1 is sonde configuration schematic diagram of the present invention.
Fig. 2 is present invention probe external detection probe module sectional view.
Fig. 3 is the invariance curve for crimping pressure and average impedance real part.
Specific embodiment
With reference to the accompanying drawings and detailed description, invention is further described in detail.
As depicted in figs. 1 and 2, a kind of NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe of the present invention,
The external detection probe module 2 of 12 outer wall border of aluminum pipe is attached at and in being placed in inside 11 detection hole of steel anchor including winding
Set formula detection probe module 1；The external detection probe module 2 by strip rubber 8 and be fixed on rubber 8
The parameter of long side bottom three is identical and the metal-rubber module composition equidistantly arranged, is the first metal-rubber module 5, the respectively
Two metal-rubber modules 6 and third metal-rubber module 7, when the winding of external detection probe module 2 is attached at 12 outer wall of aluminum pipe
When border, the first metal-rubber module 5, the second metal-rubber module 6 and third metal-rubber module 7 contact 12 outer wall of aluminum pipe；
The first metal-rubber module 5, the second metal-rubber module 6 and third metal-rubber module 7 are connected at equal intervals by 12
Contact is connected with conducting wire, and then connects impedance analyzer 14；8 two sides of rubber are fixed with buckle 13, detect convenient for external
Probe module 2 adhere well to 12 outer wall of aluminum pipe；Built in test probe module 1 is by the metal-rubber probe 3 that is connected and draws
Line 4 forms, and is connected by conducting wire with impedance analyzer 14, and 3 outer wall of metal-rubber probe is protected with circumferential insulating layer
The steel core 9 that it is demonstrate,proved with strain clamp insulate, and the lead 4 has plastic shell.
The detection method of the NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe, including NY hydraulic
The foundation of strain clamp aluminum stranded conductor crimping stress calibration curve and quantifying for NY hydraulic strain clamp aluminum stranded conductor crimp quality are commented
Estimate；
(1) foundation of NY hydraulic strain clamp aluminum stranded conductor crimping stress calibration curve, the specific method is as follows:
Crimping operation is carried out to 10 groups of aluminum pipe 12 and 10 group aluminum stranded conductors 10 using hydraulic press respectively, every group of pressure is respectively
10MPa, 20MPa, 30MPa, 40MPa, 50MPa, 60MPa, 70MPa, 80MPa, 90MPa and 100MPa；Built in test is visited
Head module 1 is fixed in the detection hole of steel anchor 11, and comes into full contact with metal-rubber probe 3 with aluminum stranded conductor 10, and external is examined
Probing head module 2 is fixed on 12 outer wall of aluminum pipe, make external detection probe module 2 and lead 4 far from 10 one end of aluminum stranded conductor away from
From for l；First metal-rubber module 5, the second metal-rubber module 6 and third metal-rubber module 7 are separately connected impedance point
First passage, second channel and the third channel of analyzer 14, and built in test probe module 1 and impedance analyzer 14 are connected
It connects, detection set of frequency is 100Hz；When crimping pressure is 10MPa, the impedance of first passage, second channel and third channel is real
Portion R11、R12And R13, average impedance real part is R1=(R11+R12+R13)/3 obtain averagely hindering under other crimping pressure operating conditions with this
Anti- real part R2、R3……R10；With 10MPa, 20MPa, 30MPa, 40MPa, 50MPa, 60MPa, 70MPa, 80MPa, 90MPa and
100MPa is ordinate, with average impedance real part R1、R2、R3……R10For abscissa, crimping pressure and average impedance real part are obtained
Invariance curve, linear fit is carried out to the curve and obtains fitting formula P=2.52R-1.29, the wherein slope a=of fitting formula
2.52, intercept b=-1.29, as shown in Figure 3.
(2) qualitative assessment of NY hydraulic strain clamp aluminum stranded conductor crimp quality, the specific method is as follows:
Built in test probe module 1 is fixed in the detection hole of steel anchor 11 of strain clamp to be measured, and makes metal rubber
Glue probe 3 and the aluminum stranded conductor 10 of strain clamp to be measured come into full contact with, and external detection probe module 2 is fixed on resistance to bracing cable to be measured
12 outer wall of aluminum pipe of folder makes external detection probe module 2 with lead 4 far from 10 one end distance l of aluminum stranded conductor；By the first gold medal
Belong to rubber module 5, the second metal-rubber module 6 and third metal-rubber module 7 be separately connected impedance analyzer first passage,
Second channel and third channel, and built in test probe module 1 is connect with impedance analyzer 14, detection set of frequency is
100Hz；The average impedance real part of first passage, second channel and third channel is 35.4, substitutes into P=2.52R- for 35.4
1.29, which obtain strain clamp aluminum stranded conductor to be measured, crimps pressure as 87.9MPa.
Claims (3)
1. a kind of NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe, it is characterised in that: attached including winding
External detection probe module (2) in aluminum pipe (12) outer wall border and the built-in inspection that is placed in inside steel anchor (11) detection hole
Probing head module (1)；The external detection probe module (2) by strip rubber (8) and be fixed on rubber
(8) three parameters of long side bottom it is identical and equidistantly arrange metal-rubber module composition, be the first metal-rubber mould respectively
Block (5), the second metal-rubber module (6) and third metal-rubber module (7) are pasted when external detection probe module (2) is wound
When investing aluminum pipe (12) outer wall border, the first metal-rubber module (5), the second metal-rubber module (6) and third metal-rubber
Module (7) contacts aluminum pipe (12) outer wall；The first metal-rubber module (5), the second metal-rubber module (6) and third metal
Rubber module (7) is connected by multiple equidistant tie points with conducting wire, and then connects impedance analyzer (14)；Rubber
(8) long side two sides are fixed with buckle (13), adhere well to aluminum pipe (12) outer wall convenient for external detection probe module (2)；
Built in test probe module (1) is made of the metal-rubber probe (3) and lead (4) being connected, and passes through conducting wire and impedance
Analyzer (14) is connected, and metal-rubber probe (3) outer wall guarantees its steel core with strain clamp with circumferential insulating layer
(9) it insulate, the lead (4) has plastic shell.
2. NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe according to claim 1, feature exist
In: the first metal-rubber module (5), the second metal-rubber module (6) and third metal-rubber module (7) are by 12 etc.
The tie point of spacing is connected with conducting wire.
3. the detection method of the probe of NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking described in claim 1, special
Sign is: foundation and NY hydraulic strain clamp aluminium including NY hydraulic strain clamp aluminum stranded conductor crimping stress calibration curve twist
The qualitative assessment of wire crimp quality；
(1) foundation of NY hydraulic strain clamp aluminum stranded conductor crimping stress calibration curve, the specific method is as follows:
Crimping operation is carried out to 10 groups of aluminum pipes (12) and 10 groups of aluminum stranded conductors (10) using hydraulic press respectively, every group of pressure is respectively to set
Count 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and the 100% of pressure；Built in test is popped one's head in
Module (1) is fixed in the detection hole of steel anchor (11), and comes into full contact with metal-rubber probe (3) with aluminum stranded conductor (10), will be outer
It sets formula detection probe module (2) and is fixed on aluminum pipe (12) outer wall, make external detection probe module (2) and lead (4) far from aluminium
The distance of twisted wire (10) one end is l；By the first metal-rubber module (5), the second metal-rubber module (6) and third metal-rubber
Module (7) is separately connected the first passage, second channel and third channel of impedance analyzer (14), and built in test is popped one's head in
Module (1) is connect with impedance analyzer (14), and detection set of frequency is 100Hz；When crimping pressure is the 10% of design pressure, the
The impedance real part in one channel, second channel and third channel is R11、R12And R13, average impedance real part is R1=(R11+R12+
R13)/3 obtain average impedance real part R under other crimping pressure operating conditions with this2、R3……R10；With design pressure 10%,
20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% is ordinate, with average impedance real part R1、R2、
R3……R10For abscissa, the invariance curve of crimping pressure and average impedance real part is obtained, linear fit is carried out to the curve and is obtained
Fitting formula P=aR+b, wherein P is crimping pressure, and R is average impedance real part, and a and b are respectively the slope of fitting formula and cut
Away from；
(2) qualitative assessment of NY hydraulic strain clamp aluminum stranded conductor crimp quality, the specific method is as follows:
Built in test probe module (1) is fixed in the detection hole of steel anchor (11) of strain clamp to be measured, and makes metal rubber
Glue probe (3) and the aluminum stranded conductor (10) of strain clamp to be measured come into full contact with, and external detection probe module (2) are fixed on to be measured
Aluminum pipe (12) outer wall of strain clamp, make external detection probe module (2) and lead (4) far from aluminum stranded conductor (10) one end away from
From for l；First metal-rubber module (5), the second metal-rubber module (6) and third metal-rubber module (7) are separately connected
First passage, second channel and the third channel of impedance analyzer, and by built in test probe module (1) and impedance analyzer
(14) it connects, detection set of frequency is 100Hz；The average impedance real part of first passage, second channel and third channel is Rn, will
RnIt substitutes into P=aR+b and obtains aluminum stranded conductor crimping pressure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047435.XA CN108414576B (en) | 2018-01-17 | 2018-01-17 | NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047435.XA CN108414576B (en) | 2018-01-17 | 2018-01-17 | NY hydraulic strain clamp aluminum stranded conductor crimp quality on-line checking probe and method |
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| CN108414576A CN108414576A (en) | 2018-08-17 |
| CN108414576B true CN108414576B (en) | 2019-03-12 |
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| JP2006029972A (en) * | 2004-07-15 | 2006-02-02 | Chubu Electric Power Co Inc | Method and device for determining deterioration of surface coating in metal member |
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