CN109616849A - A kind of 19 embedding aluminium compression bonding methods of strand steel strand wires docking of aerial condutor - Google Patents
A kind of 19 embedding aluminium compression bonding methods of strand steel strand wires docking of aerial condutor Download PDFInfo
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- CN109616849A CN109616849A CN201910019393.3A CN201910019393A CN109616849A CN 109616849 A CN109616849 A CN 109616849A CN 201910019393 A CN201910019393 A CN 201910019393A CN 109616849 A CN109616849 A CN 109616849A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/048—Crimping apparatus or processes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/20—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve
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Abstract
The invention discloses a kind of 19 strand steel strand wires of aerial condutor to dock embedding aluminium compression bonding method, including steel pipe (1) and aluminium-alloy pipe (2), aluminium-alloy pipe (2) is embedded into steel pipe (1), and 19 strand steel strand wires (3) of round wires concentric gallows empty conductor of two docking are wrapped up, crimping steel pipe (1) makes aluminium-alloy pipe (2) fit closely 19 strand steel strand wires (3) formation steel core splicing sleeves of round wires concentric gallows empty conductor.Increase by one layer of aluminium-alloy pipe between 19 strand steel strand wires of steel pipe of the present invention and round wires concentric gallows empty conductor, high moulding and high confficient of static friction using aluminium-alloy pipe, avoid occurring in the 19 strand steel strand wires crimping of steel pipe and round wires concentric gallows empty conductor 19 strand steel strand wires of round wires concentric gallows empty conductor weighed wounded, be under-voltage, loose stock phenomenon, meet connector again simultaneously holds force request, the 19 strand steel strand wires docking crimping of round wires concentric gallows empty conductor are made to be easier to implement, crimp quality is higher, crimp head can lower labor intensity and engineering cost in order to avoid non-destructive testing.
Description
Technical field
The invention belongs to 19 strand steel strand wires crimp technology fields of round wires concentric gallows empty conductor, and in particular to one kind is aerial
19 strand steel strand wires of conducting wire dock embedding aluminium compression bonding method.
Background technique
In the subsequent process of traditional project of transmitting and converting electricity aerial condutor and ground wire, the zinc-plated circle of steel-cored aluminium strand and ground wire
19 strand steel strand wires of line concentric gallows empty conductor (or aluminium take all of 19 strand steel strand wires of line concentric gallows empty conductor) connector uses steel
Pipe directly entangles 19 strand steel strand wires hydraulic connectings of round wires concentric gallows empty conductor, if steel pipe and round wires concentric gallows empty conductor
19 strand steel strand wires hardness mismatch, the off size reason of crimp, crimping pressure is insufficient, are easy to appear under-voltage, loose stock, mistake
The defects of pressure, steel wire surface damage, the power that holds of connector is caused to be unsatisfactory for standard requirements.Causing steel-cored aluminium strand and ground wire
In 19 strand steel strand wires crimping defect factors of round wires concentric gallows empty conductor, steel pipe and 19 strand steel of round wires concentric gallows empty conductor
Twisted wire hardness mismatch be least avoided that, aluminium take all of line concentric gallows empty conductor 19 strand steel strand wires production technologies
In, (cold-)drawn (steel)wire passes through liquid aluminium and aluminizes, and has mutually regarded primary tempering, and (cold-)drawn (steel)wire hardness reduces, and causes the concentric turntable of round wires empty
19 strand steel strand wires hardness of conducting wire are lower than steel pipe hardness, and steel pipe inner wall bites 19 strand steel of round wires concentric gallows empty conductor when crimping
Twisted wire steel wire, lead to connector holds power reduction.
Summary of the invention
Technical problem solved by the present invention is a kind of 19 embedding aluminium compression bonding methods of strand steel strand wires docking of aerial condutor are provided,
It can solve above-mentioned the technical problems existing in the prior art.
The technical scheme adopted by the invention is as follows: a kind of 19 embedding aluminium compression bonding methods of strand steel strand wires docking of aerial condutor, the party
Method includes docking embedding aluminium crimping structure, and structure includes steel pipe and aluminium-alloy pipe, and aluminium-alloy pipe is embedded into steel pipe, and wraps up two
19 strand steel strand wires of round wires concentric gallows empty conductor of docking, crimping steel pipe make aluminium-alloy pipe fit closely the concentric turntable of round wires
19 strand steel strand wires of hollow wire form steel core splicing sleeve, and it is two steel core twisted wire pitches that steel pipe is identical with aluminium-alloy pipe length,
The compression bonding method the following steps are included:
1) aluminium-alloy pipe is embedded into steel pipe；
2) 19 strand steel strand wires of round wires concentric gallows empty conductor by two docking are inserted into from aluminium-alloy pipe both ends, it is ensured that two circles
19 strand steel strand wires insertion depths of line concentric gallows empty conductor are suitable；
3) steel pipe is crimped using crimp, so that aluminium-alloy pipe fits closely 19 strand steel of round wires concentric gallows empty conductor
Gap forms steel core splicing sleeve between twisted wire surface and filling 19 strand steel strand wires of steel pipe and round wires concentric gallows empty conductor；
Aluminum pipe thickness and length:
(1) round wires concentric gallows empty conductor 19 aluminium amount S twisted between steel strand wires of insertion after steel core splicing sleeve crimping molding
In formula (15)
R---- steel core twisted wire steel wire radius.
(3) the aluminum pipe thickness that insertion needs
In formula (16)
R---- steel core twisted wire steel wire radius.
Then inlay aluminum pipe is with a thickness of δal
δal=δq+1(mm) (17)
(3) inlay aluminum pipe outer diameter DalFor
Dal=10r+1+2 δal(mm) (18)
In formula (18)
R---- steel core twisted wire steel wire radius.
Aluminium-alloy pipe (2) length is two steel core twisted wire pitches.
Stress is crimped after the crimping steel pipe of crimp: the press machine non-stopping time after the crimping molding of steel core splicing sleeve, in steel pipe
Radius is rfe, steel pipe center thickness is dfe, the steel core twisted wire pitch diameter of thread is d2, aluminum pipe central diameter is with a thickness of dal；
According to the relationship of material trus stress σ and true strain ε
σ=E ε (8)
In formula (8), E---- is the Young's modulus of material；
After press machine shutdown is removed after the crimping molding of steel core splicing sleeve, it is assumed that aluminum pipe wall compression chord is σ1, steel pipe interior half
The non-r of diameterfe+Δrfe, steel pipe center thickness is dfe+Δdfe, steel core twisted wire pitch diameter of thread radius of circle is R+ Δ R, aluminum pipe central diameter thickness
For dal+Δdal
After press pressure releases after the crimping molding of steel core splicing sleeve, each thickness increment relationship is
ΔrfeΔ R=Δ dal (12)
After then press pressure releases after steel core splicing sleeve crimping molding, steel core, inlay aluminum pipe, the compression between steel pipe
For
In formula (14):
σ1After press pressure releases after the crimping molding of ----steel core splicing sleeve,
Steel core, inlay aluminum pipe, steel pipe compression；
σ --- before press pressure releases after the crimping molding of-steel core splicing sleeve,
Steel core, inlay aluminum pipe, steel pipe compression；
rfeInside radius after the crimping of ----steel pipe；
R---- steel core twisted wire pitch diameter of thread d2Half；
dal----inlay aluminum pipe equivalent thickness；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy.
Steel pipe thickness δfeFor
In formula (20)
Fb----conducting wire (or ground wire) calculates Fracture Force；
σsfe----steel pipe yield strength；
Dal----inlay aluminum pipe outer diameter.
Then outer diameter of steel pipes is
Dfe=Dal+2δfe (21)。
Crimp are as follows:
Crimp area of section
Steel core crimps sectional area sx
In formula (22)
R---- steel core twisted wire steel wire radius.
Inlay aluminum pipe section sqFor
In formula (23)
Dal----inlay aluminum pipe outer diameter；
R---- steel core twisted wire steel wire radius.
Steel tube section accumulates sgFor
In formula (24)
Dfe----outer diameter of steel pipes；
Dal----inlay aluminum pipe outer diameter.
Crimp crimps area of section syFor
sy=sx+sq+sg (25)
Regular hexagon pressing mold side length α is
Regular hexagon pressing mold diagonal line b is b=a+2acos60 °=2a (27)
Safe working temperature range after the crimping molding of steel core splicing sleeve:
Assuming that environment temperature is t when splicing sleeve is installed0, the linear expansion coefficient of steel core and steel pipe is afe, inlay aluminum pipe line is swollen
Swollen coefficient is aal, when running temperature is t1When
Steel core radial expansion amount
ΔRt=Rafe(t1-t0) (28)
Inlay aluminum pipe swell increment
Δdalt=dalaal(t1-t0) (29)
Pipe diameter swell increment
Δrfet=rfeafe(t1-t0) (30)
Safe temperature
When temperature increases:
I.e. splicing sleeve running temperature incrementss should meet
In formula (32)
σ1After press pressure releases after the crimping molding of ----steel core splicing sleeve,
Steel core, inlay aluminum pipe, steel pipe compression；
σ --- before press pressure releases after the crimping molding of-steel core splicing sleeve,
Steel core, inlay aluminum pipe, steel pipe compression；
rfeInside radius after the crimping of ----steel pipe；
R---- steel core twisted wire pitch diameter of thread d2Half；
dal----inlay aluminum pipe equivalent thickness；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium；
When temperature reduces:
I.e. splicing sleeve running temperature reduction amount should meet
In formula (34)
Fb----conducting wire (or ground wire) calculates Fracture Force；
σ1After press pressure releases after the crimping molding of ----copper core splicing sleeve,
Steel core, inlay aluminum pipe, the compression between steel pipe；
σ --- before press pressure releases after the crimping molding of-copper core splicing sleeve,
Steel core, inlay aluminum pipe, the compression between steel pipe；
rfeInside radius after the crimping of ----steel pipe；
R---- steel core twisted wire pitch diameter of thread d2Half；
dal----inlay aluminum pipe equivalent thickness；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy；
R---- steel core twisted wire steel wire radius；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium.
Beneficial effects of the present invention: compared with prior art, steel pipe of the present invention and round wires concentric gallows empty conductor 19 strands
Increase by one layer of aluminium-alloy pipe between steel strand wires, high moulding and high confficient of static friction using aluminium-alloy pipe are avoided in steel pipe and circle
There are 19 strand steel strand wires of round wires concentric gallows empty conductor when the 19 strand steel strand wires crimping of line concentric gallows empty conductor to be weighed wounded, owed
Pressure, loose stock phenomenon, while meet connector again holds force request, presses 19 the strands steel strand wires docking of round wires concentric gallows empty conductor
It connects and more easily implements, crimp quality is higher, and crimp head can lower labor intensity and engineering cost in order to avoid non-destructive testing.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is structural section schematic diagram of the invention；
Fig. 3 is structural schematic diagram after crimping of the invention；
Fig. 4 is 19 strand steel strand wires simplified model schematic diagrames of round wires concentric gallows empty conductor；
Fig. 5 is 19 strand steel strand wires Longitudinal cross section schematics of round wires concentric gallows empty conductor.
Specific embodiment
With reference to the accompanying drawing and the present invention is described further in specific embodiment.
Embodiment 1: a kind of 19 embedding aluminium compression bonding methods of strand steel strand wires docking of aerial condutor, this method includes docking embedding aluminium pressure
Binding structure, structure include steel pipe 1 and aluminium-alloy pipe 2, and aluminium-alloy pipe 2 is embedded into steel pipe 1, and the round wires for wrapping up two docking are same
19 strand steel strand wires 3 of heart gallows empty conductor, crimping steel pipe 1 make aluminium-alloy pipe 2 fit closely round wires concentric gallows empty conductor 19
Root twists steel strand wires 3 and forms steel core splicing sleeve, and steel pipe 1 is identical with 2 length of aluminium-alloy pipe, is two steel core twisted wire pitches, the party
Method the following steps are included:
1) aluminium-alloy pipe is embedded into steel pipe；
2) 19 strand steel strand wires of round wires concentric gallows empty conductor by two docking are inserted into from aluminium-alloy pipe both ends, it is ensured that two circles
19 strand steel strand wires insertion depths of line concentric gallows empty conductor are suitable；
3) steel pipe is crimped using crimp, so that aluminium-alloy pipe fits closely 19 strand steel of round wires concentric gallows empty conductor
Gap forms steel core splicing sleeve between twisted wire surface and filling 19 strand steel strand wires of steel pipe and round wires concentric gallows empty conductor；
Aluminum pipe thickness and length:
(1) round wires concentric gallows empty conductor 19 aluminium amount s twisted between steel strand wires of insertion after steel core splicing sleeve crimping molding
In formula (15)
R---- steel core twisted wire steel wire radius.
(4) the aluminum pipe thickness that insertion needs
In formula (16)
R---- steel core twisted wire steel wire radius.
Then inlay aluminum pipe is with a thickness of δal
δal=δq+1(mm) (17)
(3) inlay aluminum pipe outer diameter DalFor
Dal=10r+1+2 δal(mm) (18)
In formula (18)
R---- steel core twisted wire steel wire radius.
Aluminium-alloy pipe (2) length is two steel core twisted wire pitches.
Novel 19 strand steel strand wires of round wires concentric gallows empty conductor dock embedding aluminium aluminium hydraulic pressed connecting pipe, it is by outer layer pipe and internal layer
Aluminium-alloy pipe is constituted, and sees Fig. 1.Outer layer pipe provides 19 strand steel strand wires of round wires concentric gallows empty conductor and docks main tension stress
And tap pressure, internal layer aluminium-alloy pipe provide steel wire insertion packing material (see Fig. 2), it will using the high confficient of static friction of aluminium alloy
Tap pressure is changed into tension stress, and that improves connector holds power (see Fig. 3).
Since internal layer aluminium-alloy pipe hardness is low, 19 strand steel strand wires of round wires concentric gallows empty conductor will not be weighed wounded, as long as mould
Tool is matched with aluminium hydraulic pressed connecting pipe, and crimp head is not in under-voltage, loose stock phenomenon, can not have to carry out non-destructive testing crimp head.
Aluminium hydraulic pressed connecting pipe inlay aluminum pipe calculates
1, the steel core steel core twisted wire pitch diameter of thread is d2It calculates
By bolt thread parameter definition, bolt thread central diameter d2, it is usually used in geometry calculating, is the straight of an imaginary cylinder
Diameter, tooth form groove and ledge width are equal on the bus of the cylinder.Then the steel core twisted wire pitch diameter of thread is d2For great circle O in Fig. 4
Diameter, radius R, for the steel core twisted wire of 19 steel wires, circle O is equal to the 1/24 of circle O perimeter with the circle P arc length intersected.
That is θ
(1) in formula
R---- steel core twisted wire pitch diameter of thread d2Half；
θ --- the half of the cut steel core twisted wire pitch diameter of thread arc chord angle of-cover wire.
Justifying O equation is
x2+y2=R2 (2)
X=Rcos θ (3)
Y=Rsin θ (4)
Justifying P equation is
(x-4r)2+y2=r2 (5)
(5) in formula
R---- steel core twisted wire steel wire radius.
Equation group is found with five equations, is acquired
R=4.785r (6)
I.e.
D2=9.57r (7)
2, Stress calculation is crimped
Press machine non-stopping time after the crimping molding of steel core splicing sleeve, such as Fig. 4, steel pipe inside radius are rfe, steel pipe center thickness is
dfe, the steel core twisted wire pitch diameter of thread is d2, aluminum pipe central diameter is with a thickness of dal。
According to the relationship of material trus stress σ and true strain ε
σ=E ε (8)
(8) in formula
E---- is the Young's modulus of material
After press machine shutdown is removed after the crimping molding of steel core splicing sleeve, it is assumed that aluminum pipe wall compression chord is σ1, steel pipe interior half
The non-r of diameterfe+Δrfe, steel pipe center thickness is dfe+Δdfe, steel core twisted wire pitch diameter of thread radius of circle is R+ Δ R, aluminum pipe central diameter thickness
For dal+Δdal。
After press pressure releases after the crimping molding of steel core splicing sleeve, these thickness increment relationships are
ΔrfeΔ R=Δ dal (12)
After then press pressure releases after steel core splicing sleeve crimping molding, steel core, inlay aluminum pipe, the compression between steel pipe
For
In formula (14)
σ1After press pressure releases after the crimping molding of ----steel core splicing sleeve,
Steel core, inlay aluminum pipe, steel pipe compression；
σ --- before press pressure releases after the crimping molding of-steel core splicing sleeve,
Steel core, inlay aluminum pipe, steel pipe compression；
rfeInside radius after the crimping of ----steel pipe；
R---- steel core twisted wire pitch diameter of thread d2Half；
dal----inlay aluminum pipe equivalent thickness；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy.
3, inlay aluminum pipe calculates
(1) round wires concentric gallows empty conductor 19 aluminium amount S twisted between steel strand wires of insertion after steel core splicing sleeve crimping molding
In formula (15)
R---- steel core twisted wire steel wire radius.
(5) the aluminum pipe thickness that insertion needs
In formula (16)
R---- steel core twisted wire steel wire radius.
Then inlay aluminum pipe is with a thickness of δal
δal=δq+1(mm) (17)
(3) inlay aluminum pipe outer diameter DalFor
Dal=10r+1+2 δal(mm) (18)
In formula (18)
R---- steel core twisted wire steel wire radius.
(4) inlay aluminium tube material:
According to the yield strength and inoxidizability of aluminium alloy, inlay aluminum pipe selects the manufacture of 5A05 rustproof aluminum alloy.
(5) inlay aluminum pipe length:
According to data, the confficient of static friction of aluminium alloy and aluminium alloy is 1.05-1.35, the static friction of aluminium alloy and mild steel
Coefficient is 0.61.For 19 19 strand aluminum-cladding stranded wires of round wires concentric gallows empty conductor, round wires concentric gallows empty conductor strand platings
Zinc steel strand wires are all calculated by 19 strand galvanized strand wires of round wires concentric gallows empty conductor and aluminium alloy inlay pipe stiction, embedding
The critical crimping length l of layer aluminum pipe thread damageqminFor
In formula (19)
Fb----conducting wire (or ground wire) calculates Fracture Force；
R---- steel core twisted wire pitch diameter of thread d2Half；
d2----steel core twisted wire the pitch diameter of thread.
It is computed, the critical crimping length l of inlay aluminum pipe thread damageqminLess than steel core twisted wire pitch, steel core twisted wire pitch
Generally lQmin's3 to 4 times, therefore for the sake of security, inlay aluminum pipe length takes 2 steel core twisted wire pitch (1 steel core twisted wires
Pitch is 18 times of steel core diameter).
Steel pipe calculates: steel pipe material: it is Q345B, yield strength 345MPa that steel core connecting crimping steel pipe, which is material,.
Pipe diameter: the connecting pipe diameter of steel core twisted wire is equal to inlay aluminum pipe outer diameter.
Outer diameter of steel pipes: 19 total Fracture Forces of strand steel strand wires of round wires concentric gallows empty conductor are Fb, the yield strength of steel pipe is
σsfe, then steel pipe thickness δfeFor
In formula (20)
Fb----conducting wire (or ground wire) calculates Fracture Force；
σsfe----steel pipe yield strength；
Dal----inlay aluminum pipe outer diameter.
Then outer diameter of steel pipes is
Dfe=Dal+2δfe (21)
The length of steel pipe: length of steel pipe is identical as inlay aluminum pipe, and for 2 steel core twisted wire pitches, (1 steel core twisted wire pitch is
18 times of steel core diameter).
Die parameters calculate: crimp crimps area of section
1. crimp crimps area of section
Steel core crimps sectional area sx
In formula (22)
R---- steel core twisted wire steel wire radius.
Inlay aluminum pipe section sqFor
In formula (23)
Dal----inlay aluminum pipe outer diameter；
R---- steel core twisted wire steel wire radius.
Steel tube section accumulates sgFor
In formula (24)
Dfe----outer diameter of steel pipes；
Dal----inlay aluminum pipe outer diameter.
Crimp crimps area of section syFor
sy=sx+sq+sg (25)
2. regular hexagon pressing mold side length α is
3. regular hexagon pressing mold diagonal line b is b=a+2acos60 °=2a (27)
Safe operating temperature calculates: assuming that environment temperature is t when splicing sleeve is installed0, the linear expansion coefficient of steel core and steel pipe
For afe, inlay aluminum pipe linear expansion coefficient is aal, when running temperature is t1When
1. steel core radial expansion amount
ΔRt=Rafe(t1-t0) (28)
2. inlay aluminum pipe swell increment
Δdalt=dalaal(t1-t0) (29)
3. pipe diameter swell increment
Δrfet=rfeafe(t1-t0) (30)
4. safe temperature
When temperature increases:
I.e. splicing sleeve running temperature incrementss should meet
In formula (32)
σ1After press pressure releases after the crimping molding of ----steel core splicing sleeve,
Steel core, inlay aluminum pipe, steel pipe compression；
σ --- before press pressure releases after the crimping molding of-steel core splicing sleeve,
Steel core, inlay aluminum pipe, steel pipe compression；
rfeInside radius after the crimping of ----steel pipe；
R---- steel core twisted wire pitch diameter of thread d2Half；
dal----inlay aluminum pipe equivalent thickness；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium；
When temperature reduces:
I.e. splicing sleeve running temperature reduction amount should meet
In formula (34)
Fb----traverse calculation Fracture Force；
σ1After press pressure releases after the crimping molding of ----copper core splicing sleeve,
Steel core, inlay aluminum pipe, the compression between steel pipe；
σ --- before press pressure releases after the crimping molding of-copper core splicing sleeve,
Steel core, inlay aluminum pipe, the compression between steel pipe；
rfeInside radius after the crimping of ----steel pipe；
R---- steel core twisted wire pitch diameter of thread d2Half；
dal----inlay aluminum pipe equivalent thickness；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy；
R---- steel core twisted wire steel wire radius；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium.
Example calculation
1. steel-cored aluminium strand parameter
2. inlay aluminum pipe parameter calculates
3. steel pipe parameter calculates
4. pressing mold parameter calculates
5. safe operating temperature calculates
Example that the above description is merely a specific embodiment, scope of protection of the present invention is not limited thereto.It is ripe
It knows the those skilled in the art in the technical scope disclosed by the present invention, change or replacement mode can be easily found, these
It should be covered by the protection scope of the present invention.For this purpose, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (5)
1. a kind of 19 strand steel strand wires of aerial condutor dock embedding aluminium compression bonding method, it is characterised in that: this method includes steel strand wires pair
Embedding aluminium crimping structure is connect, structure includes steel pipe (1) and aluminium-alloy pipe (2), and aluminium-alloy pipe (2) is embedded into steel pipe (1), and wraps
19 strand steel strand wires (3) of round wires concentric gallows empty conductor of two docking are wrapped up in, crimping steel pipe (1) pastes aluminium-alloy pipe (2) closely
Close round wires concentric gallows empty conductor 19 strands steel strand wires (3) formation steel core splicing sleeves, the compression bonding method the following steps are included:
1) aluminium-alloy pipe is embedded into steel pipe；
2) 19 strand steel strand wires of round wires concentric gallows empty conductor by two docking are inserted into from aluminium-alloy pipe both ends, it is ensured that two round wires are same
19 strand steel strand wires insertion depths of heart gallows empty conductor are suitable；
3) steel pipe is crimped using crimp, so that aluminium-alloy pipe fits closely 19 strand steel strand wires of round wires concentric gallows empty conductor
Gap forms steel core splicing sleeve between surface and filling 19 strand steel strand wires of steel pipe and round wires concentric gallows empty conductor；
Aluminum pipe thickness and length:
(1) round wires concentric gallows empty conductor 19 aluminium amount s twisted between steel strand wires of insertion after steel core splicing sleeve crimping molding
In formula (15)
R---- steel core twisted wire steel wire radius.
(2) the aluminum pipe thickness that insertion needs
In formula (16)
R---- steel core twisted wire steel wire radius.
Then inlay aluminum pipe is with a thickness of δal
δal=δq+1 (mm) (17)
(3) inlay aluminum pipe outer diameter DalFor
Dal=10r+1+2 δal (mm) (18)
In formula (18)
R---- steel core twisted wire steel wire radius.
Aluminium-alloy pipe (2) length is two steel core twisted wire pitches.
2. 19 strand steel strand wires of a kind of aerial condutor according to claim 1 dock embedding aluminium compression bonding method, it is characterised in that:
Crimp stress after the crimping steel pipe of crimp: press machine non-stopping time after the crimping molding of steel core splicing sleeve, steel pipe inside radius are rfe,
Steel pipe center thickness is dfe, the steel core twisted wire pitch diameter of thread is d2, aluminum pipe central diameter is with a thickness of dal；
According to the relationship of material trus stress σ and true strain ε
σ=E ε (8)
In formula (8), E---- is the Young's modulus of material；
After press machine shutdown is removed after the crimping molding of steel core splicing sleeve, it is assumed that aluminum pipe wall compression chord is σ1, steel pipe inside radius is not
rfe+Δrfe, steel pipe center thickness is dfe+Δdfe, steel core twisted wire pitch diameter of thread radius of circle be R+ Δ R, aluminum pipe central diameter with a thickness of
dal+Δdal
After press pressure releases after the crimping molding of steel core splicing sleeve, each thickness increment relationship is
ΔrfeΔ R=Δ dal (12)
After then press pressure releases after steel core splicing sleeve crimping molding, steel core, inlay aluminum pipe, the compression between steel pipe are
In formula (14):
σ1----steel core splicing sleeve crimping molding after press pressure release after, steel core, inlay aluminum pipe, steel pipe compression；
σ ----steel core splicing sleeve crimping molding after press pressure release before, steel core, inlay aluminum pipe, steel pipe compression；
rfeInside radius after the crimping of ----steel pipe；
R---- steel core twisted wire pitch diameter of thread d2Half；
dal----inlay aluminum pipe equivalent thickness；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy.
3. 19 strand steel strand wires of a kind of aerial condutor according to claim 1 dock embedding aluminium compression bonding method, it is characterised in that:
Steel pipe thickness δfeFor
In formula (20)
Fb----conducting wire (or ground wire) calculates Fracture Force；
σsfe----steel pipe yield strength；
Dal----inlay aluminum pipe outer diameter.
Then outer diameter of steel pipes is
Dfe=Dal+2δfe (21)。
4. 19 strand steel strand wires of a kind of aerial condutor according to claim 1 dock embedding aluminium compression bonding method, it is characterised in that:
Crimp are as follows:
Crimp area of section
Steel core crimps sectional area sx
In formula (22)
R---- steel core twisted wire steel wire radius.
Inlay aluminum pipe section sqFor
In formula (23)
Dal----inlay aluminum pipe outer diameter；
R---- steel core twisted wire steel wire radius.
Steel tube section accumulates sgFor
In formula (24)
Dfe----outer diameter of steel pipes；
Dal----inlay aluminum pipe outer diameter.
Crimp crimps area of section syFor
sy=sx+sq+sg (25)
Regular hexagon pressing mold side length α is
Regular hexagon pressing mold diagonal line b is
B=a+2acos60 °=2a (27).
5. 19 strand steel strand wires of a kind of aerial condutor according to claim 3 dock embedding aluminium compression bonding method, it is characterised in that:
Safe working temperature range after the crimping molding of steel core splicing sleeve:
Assuming that environment temperature is t when splicing sleeve is installed0, the linear expansion coefficient of steel core and steel pipe is afe, inlay aluminium line expansion system
Number is aal, when running temperature is t1When
Steel core radial expansion amount
ΔRt=Rafe(t1-t0) (28)
Inlay aluminum pipe swell increment
Δdalt=dalaal(t1-t0) (29)
Pipe diameter swell increment
Δrfet=rfeafe(t1-t0) (30)
Safe temperature
When temperature increases:
I.e. splicing sleeve running temperature incrementss should meet
In formula (32)
σ1----steel core splicing sleeve crimping molding after press pressure release after, steel core, inlay aluminum pipe, steel pipe compression；
σ ----steel core splicing sleeve crimping molding after press pressure release before, steel core, inlay aluminum pipe, steel pipe compression；
rfeInside radius after the crimping of ----steel pipe；
R---- steel core twisted wire pitch diameter of thread d2Half；
dal----inlay aluminum pipe equivalent thickness；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium；
When temperature reduces:
I.e. splicing sleeve running temperature reduction amount should meet
In formula (34)
Fb----traverse calculation Fracture Force；
σ1After press pressure releases after the crimping molding of ----copper core splicing sleeve, steel core, inlay aluminum pipe, the compression between steel pipe；
σ --- before press pressure releases after the crimping molding of-copper core splicing sleeve, steel core, inlay aluminum pipe, the compression between steel pipe；
rfeInside radius after the crimping of ----steel pipe；
R---- steel core twisted wire pitch diameter of thread d2Half；
dal----inlay aluminum pipe equivalent thickness；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy；
R---- steel core twisted wire steel wire radius；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium.
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| CN110364831A (en) * | 2019-08-08 | 2019-10-22 | 贵州电网有限责任公司 | A kind of embedding aluminium crimping structure of the full tension of steel-cored aluminium strand |
| CN110364907A (en) * | 2019-08-08 | 2019-10-22 | 贵州电网有限责任公司 | A kind of 7 strand steel-cored aluminium strand compression bonding methods of round wires concentric gallows empty conductor |
| CN110380308A (en) * | 2019-08-09 | 2019-10-25 | 贵州电网有限责任公司 | A kind of 19 embedding aluminium strain clamp compression bonding methods of strand steel strand wires |
| CN110444983A (en) * | 2019-08-08 | 2019-11-12 | 贵州电网有限责任公司 | A kind of 19 strand steel-cored aluminium strand compression bonding methods of round wires concentric gallows empty conductor |
| CN110445061A (en) * | 2019-08-08 | 2019-11-12 | 贵州电网有限责任公司 | A kind of 19 embedding aluminium strain clamp compression bonding methods of strand steel-cored aluminium strand |
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| CN110364831A (en) * | 2019-08-08 | 2019-10-22 | 贵州电网有限责任公司 | A kind of embedding aluminium crimping structure of the full tension of steel-cored aluminium strand |
| CN110364907A (en) * | 2019-08-08 | 2019-10-22 | 贵州电网有限责任公司 | A kind of 7 strand steel-cored aluminium strand compression bonding methods of round wires concentric gallows empty conductor |
| CN110444983A (en) * | 2019-08-08 | 2019-11-12 | 贵州电网有限责任公司 | A kind of 19 strand steel-cored aluminium strand compression bonding methods of round wires concentric gallows empty conductor |
| CN110445061A (en) * | 2019-08-08 | 2019-11-12 | 贵州电网有限责任公司 | A kind of 19 embedding aluminium strain clamp compression bonding methods of strand steel-cored aluminium strand |
| CN110445061B (en) * | 2019-08-08 | 2021-03-02 | 贵州电网有限责任公司 | Crimping method for aluminum-embedded strain clamp of 19 stranded steel-cored aluminum strands |
| CN110380308A (en) * | 2019-08-09 | 2019-10-25 | 贵州电网有限责任公司 | A kind of 19 embedding aluminium strain clamp compression bonding methods of strand steel strand wires |
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