CN110350327A - The embedding aluminium strain clamp crimping structure of 7 strand steel strand wires of one kind and its compression bonding method - Google Patents
The embedding aluminium strain clamp crimping structure of 7 strand steel strand wires of one kind and its compression bonding method Download PDFInfo
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- CN110350327A CN110350327A CN201910732664.XA CN201910732664A CN110350327A CN 110350327 A CN110350327 A CN 110350327A CN 201910732664 A CN201910732664 A CN 201910732664A CN 110350327 A CN110350327 A CN 110350327A
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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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- 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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Abstract
The invention discloses a kind of embedding aluminium strain clamp crimping structure of 7 strand steel strand wires and its compression bonding methods, including steel anchor aluminium hydraulic pressed connecting pipe and embedding aluminum pipe, embedding aluminum pipe is embedded into steel anchor aluminium hydraulic pressed connecting pipe, and the 7 strand steel strand wires of round wires concentric gallows empty conductor for penetrating connection strain clamp end are wrapped up, crimping steel anchor aluminium hydraulic pressed connecting pipe makes embedding aluminum pipe fit closely 7 strand steel strand wires formation steel strand wires tension resisting connectors of round wires concentric gallows empty conductor.Increase by one layer of embedding aluminum pipe between 7 strand steel strand wires of steel anchor aluminium hydraulic pressed connecting pipe and round wires concentric gallows empty conductor of the present invention, high moulding and high confficient of static friction using embedding aluminum pipe, avoid occurring in steel anchor aluminium hydraulic pressed connecting pipe and the crimping of 7 strand steel strand wires 7 strand steel strand wires and strain clamp weighed wounded, be under-voltage, loose stock phenomenon, meet connector again simultaneously holds force request, 7 strand steel strand wires docking crimping are made to be easier to implement, crimp quality is higher, and crimp head can lower labor intensity and engineering cost in order to avoid non-destructive testing.
Description
Technical field
The invention belongs to 7 embedding aluminium strain clamp crimp technology fields of strand steel strand wires, and in particular to a kind of 7 strand steel strand wires
Embedding aluminium strain clamp crimping structure and its compression bonding method.
Background technique
In the subsequent process of traditional project of transmitting and converting electricity aerial condutor strain clamp, the galvanized strand wires of steel strand wires (or
Aluminum-cladding stranded wire) connector directly entangles steel strand wires hydraulic connecting with steel anchor, if steel anchor is mismatched with steel strand wires hardness, is crimped
The defects of die size is unreasonable, crimping pressure is insufficient, is easy to appear under-voltage, loose stock, over-voltage, steel wire surface damage, causes to connect
The power that holds of head is unsatisfactory for standard requirements.In the steel strand wires crimping defect factors for causing steel strand wires, steel anchor and steel strand wires hardness
Mismatch is least avoided that, in the production technology of aluminum-cladding stranded wire, (cold-)drawn (steel)wire passes through liquid aluminium and aluminizes, and has mutually regarded one
Secondary tempering, (cold-)drawn (steel)wire hardness reduce, and cause steel strand wires hardness lower than steel anchor hardness, and steel anchor inner wall bites steel strand wires steel when crimping
Silk, lead to connector holds power reduction.
Summary of the invention
Technical problem solved by the present invention is providing the embedding aluminium strain clamp crimping structure of 7 strand steel strand wires of one kind and its pressure
Method is connect, 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 7 embedding aluminium strain clamp crimping structures of strand steel strand wires, including steel anchor pressure
Adapter tube and embedding aluminum pipe, embedding aluminum pipe are embedded into steel anchor aluminium hydraulic pressed connecting pipe, and wrap up the concentric turntable of round wires for penetrating connection strain clamp end
7 strand steel strand wires of hollow wire, crimping steel anchor aluminium hydraulic pressed connecting pipe make embedding aluminum pipe fit closely 7 strand steel strands of round wires concentric gallows empty conductor
Line forms steel strand wires tension resisting connector.
Embedding aluminum pipe length is a steel core twisted wire pitch.
A kind of compression bonding method of 7 strands embedding aluminium strain clamp crimping structure of steel strand wires, method includes the following steps:
1) embedding aluminum pipe is embedded into steel anchor aluminium hydraulic pressed connecting pipe；
2) steel strand wires are inserted into from embedding aluminum pipe one end, and steel strand wires is inserted into wire clamp anchor ring bottom；
3) using crimp crimp steel anchor aluminium hydraulic pressed connecting pipe so that embedding aluminum pipe tightly engage steel strand surface and filling steel anchor and
Gap forms steel strand wires tension resisting connector between steel strand wires.
Stress is crimped after the crimping steel anchor aluminium hydraulic pressed connecting pipe of crimp: the press machine non-stopping time after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe,
Steel anchor aluminium hydraulic pressed connecting pipe inside radius is rfe, steel anchor aluminium hydraulic pressed connecting pipe center thickness is dfe, the steel core twisted wire pitch diameter of thread is d2, aluminum pipe central diameter thickness
For dal, the steel anchor trade mark is Q345；
According to the relationship of material trus stress σ and true strain ε
σ=E ε (1)
In formula (1), E---- is the Young's modulus of material；
After press machine shutdown is removed after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe, if aluminum pipe wall compression chord is σ1, steel anchor aluminium hydraulic pressed connecting pipe
Inside radius is rfe+Δrfe, steel anchor aluminium hydraulic pressed connecting pipe center thickness is dfe+Δdfe, steel core twisted wire pitch diameter of thread radius of circle is R+ Δ R, aluminium
Pipe central diameter is with a thickness of dal+Δdal
After press pressure releases after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe, each thickness increment relationship is
ΔrfeΔ R=Δ dal (5)
After then press pressure releases after steel anchor aluminium hydraulic pressed connecting pipe crimping molding, steel core, embedding aluminum pipe, the pressure between steel anchor aluminium hydraulic pressed connecting pipe
Stress are as follows:
In formula (7):
σ1After press pressure releases after the crimping molding of ----steel anchor,
Steel core, embedding aluminum pipe, the compression between steel anchor, unit pa；
σ --- before press pressure releases after the crimping molding of-steel anchor,
Steel core, embedding aluminum pipe, the compression between steel anchor, unit pa；
rfeInside radius after the crimping of ----steel anchor, unit mm；
R---- steel core twisted wire pitch diameter of thread d2Half, unit mm；
dal----embedding aluminum pipe equivalent thickness, unit mm；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy.
Embedding aluminum pipe thickness and length:
Aluminium amount s after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe between embedding aluminum pipe insertion steel strand wires:
In formula (8), r---- steel core twisted wire steel wire radius, unit mm；
It is embedded in the aluminum pipe thickness needed
In formula (9), r---- steel core twisted wire steel wire radius, unit mm；
Then embedding aluminum pipe is with a thickness of δal, unit mm:
δal=δq+1 (10)
(3) embedding aluminum pipe outer diameter DalFor
Dal=6r+1+2 δal (11)
In formula (11), r---- steel core twisted wire steel wire radius, unit mm；
Embedding aluminum pipe length is a steel core twisted wire pitch.
Steel anchor aluminium hydraulic pressed connecting pipe uses the trade mark for Q345 high-strength steel, and steel anchor crimps tube thickness δfeFor
In formula (12)
Fb----conducting wire (or ground wire) calculates Fracture Force, unit N；
σsfe----steel anchor yield strength, unit Mpa；
DalThe embedding aluminum pipe outer diameter of ----steel core, unit mm；
Then steel anchor crimping pipe outside diameter is
Dfe=Dal+2δfe (13)
It is identical as embedding aluminum pipe length that steel anchor crimps length of tube.
Crimp crimps area of section are as follows:
Steel core crimps sectional area sx
In formula (14), r---- steel core twisted wire steel wire radius, unit mm；
Embedding aluminum pipe section sqFor
In formula (15),
R---- steel core twisted wire steel wire radius, unit mm；
DalThe embedding aluminum pipe outer diameter of ----steel core, unit mm；
Steel anchor aluminium hydraulic pressed connecting pipe sectional area sgFor
In formula (24), Dsl=Dal+1
Dfe----steel anchor outer diameter, unit mm；
Dsl----steel anchor internal diameter, unit mm；
DalThe embedding aluminum pipe outer diameter of ----steel core, unit mm；
Crimp crimps area of section syFor
sy=sx+sq+sg (17)
Regular hexagon pressing mold side length α is
Regular hexagon pressing mold diagonal line b is
60 °=2a of b=a+2a cos (19).
Safe working temperature range after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe:
If environment temperature is t when splicing sleeve is installed0, the linear expansion coefficient of steel core and steel anchor aluminium hydraulic pressed connecting pipe is afe, embedding aluminum pipe line
The coefficient of expansion is aal, when running temperature is t1When
Steel core radial expansion amount
ΔRt=Rafe(t1-t0) (20)
Embedding aluminum pipe swell increment
Δdalt=dalaal(t1-t0) (21)
Steel anchor crimps bore swell increment
Δrfet=rfeafe(t1-t0) (22)
Safe working temperature
When temperature increases:
I.e. splicing sleeve running temperature incrementss should meet
In formula (31)
σ1After press pressure releases after the crimping molding of steel anchor, steel core, embedding aluminum pipe, the compression between steel anchor, unit
pa；
Before press pressure releases after σ-steel anchor crimping molding, steel core, embedding aluminum pipe, the compression unit pa between steel anchor；
rfeInside radius after the crimping of ----steel anchor, unit mm；
The half of R---- steel core steel strand wires pitch diameter of thread d2, unit mm；
dal----embedding aluminum pipe equivalent thickness, unit mm；
EfeThe Young's modulus of ----steel, unit mm；
EalThe Young's modulus of ----aluminium alloy, unit mm；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium；
When temperature reduces:
That is steel anchor aluminium hydraulic pressed connecting pipe running temperature reduction amount should meet
In formula (26)
Fb----conducting wire (or ground wire) calculates Fracture Force, unit pa；
σ1After the crimping molding of ----steel anchor after press pressure Xie Chu, steel core, embedding aluminum pipe, the compression between steel anchor are single
Position pa；
σ --- before press pressure releases after the crimping molding of-steel anchor, steel core, embedding aluminum pipe, the compression between steel anchor, unit
pa；
rfeInside radius after the crimping of ----steel anchor, unit mm；
R---- steel core steel strand wires pitch diameter of thread d2Half, unit mm；
dal----embedding aluminum pipe equivalent thickness, unit mm；
EfeThe Young's modulus of ----steel, unit Gpa；
EalThe Young's modulus of ----aluminium alloy, unit GPa；
R---- steel core twisted wire steel wire radius, unit mm；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium.
Beneficial effects of the present invention: compared with prior art, steel anchor aluminium hydraulic pressed connecting pipe and round wires concentric gallows empty conductor 7 of the present invention
Root, which twists, increases by one layer of embedding aluminum pipe between steel strand wires, high moulding and high confficient of static friction using embedding aluminum pipe avoid crimping in steel anchor
7 strand steel strand wires of pipe and round wires concentric gallows empty conductor occur when crimping 7 strand steel strand wires of round wires concentric gallows empty conductor with it is resistance to
Bracing cable double-layered quilt weighs wounded, is under-voltage, loose stock phenomenon, while meet connector again holds force request, makes round wires concentric gallows empty conductor 7
It twists steel strand wires docking crimping to be easier to implement, crimp quality is higher, and crimp head can lower labor intensity and work in order to avoid non-destructive testing
Journey expense.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is non-crimping structure schematic diagram of the invention；
Fig. 3 is crimping structure schematic diagram of the invention；
Fig. 4 is cross section structure schematic diagram at crimping of the invention.
Specific embodiment
With reference to the accompanying drawing and the present invention is described further in specific embodiment.
Embodiment 1: as shown in Figure 1-Figure 3, a kind of 7 embedding aluminium strain clamp crimping structures of strand steel strand wires, including steel anchor pressure
Adapter tube 1 and embedding aluminum pipe 2, embedding aluminum pipe 2 are embedded into steel anchor aluminium hydraulic pressed connecting pipe 1, and wrap up penetrate connection strain clamp end round wires it is concentric
7 strand steel strand wires 3 of gallows empty conductor, crimping steel anchor aluminium hydraulic pressed connecting pipe 1 make embedding aluminum pipe 2 fit closely round wires concentric gallows empty conductor 7
Root twists steel strand wires 3 and forms steel strand wires tension resisting connector.
Embedding 2 length of aluminum pipe is a steel core twisted wire pitch.
Novel 7 embedding aluminium strain clamp aluminium hydraulic pressed connecting pipes of strand steel strand wires of round wires concentric gallows empty conductor, it is by outer layer steel anchor pressure
Adapter tube and the embedding aluminum pipe of internal layer are constituted, and see Fig. 1.Outer layer steel anchor aluminium hydraulic pressed connecting pipe provides 7 strand steel strand wires pair of round wires concentric gallows empty conductor
Main tension stress and tap pressure are connect, embedding aluminum pipe provides steel wire and is embedded in packing material, sees Fig. 1, rubs using the height of aluminium alloy is quiet
It wipes coefficient and tap pressure is changed into tension stress, that improves connector holds power.
Since the embedding aluminum pipe hardness of internal layer is low, 7 strand steel strand wires of round wires concentric gallows empty conductor will not be weighed wounded, if mold with
Aluminium hydraulic pressed connecting pipe matching, crimp head is not in under-voltage, loose stock phenomenon, can not have to carry out non-destructive testing crimp head.
Embodiment 2: a kind of compression bonding method of 7 strands embedding aluminium strain clamp crimping structure of steel strand wires, this method includes following
Step:
1) embedding aluminum pipe is embedded into steel anchor aluminium hydraulic pressed connecting pipe；
2) steel strand wires are inserted into from embedding aluminum pipe one end, and steel strand wires is inserted into wire clamp anchor ring bottom；
3) using crimp crimp steel anchor aluminium hydraulic pressed connecting pipe so that embedding aluminum pipe tightly engage steel strand surface and filling steel anchor and
Gap forms steel strand wires tension resisting connector between steel strand wires.
Stress is crimped after the crimping steel anchor aluminium hydraulic pressed connecting pipe of crimp: the press machine non-stopping time after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe,
Steel anchor aluminium hydraulic pressed connecting pipe inside radius is rfe, steel anchor aluminium hydraulic pressed connecting pipe center thickness is dfe, the steel core twisted wire pitch diameter of thread is d2, aluminum pipe central diameter thickness
For dal, the steel anchor trade mark is Q345；
According to the relationship of material trus stress σ and true strain ε
σ=E ε (1)
In formula (1), E---- is the Young's modulus of material；
After press machine shutdown is removed after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe, if aluminum pipe wall compression chord is σ1, steel anchor aluminium hydraulic pressed connecting pipe
Inside radius is rfe+Δrfe, steel anchor aluminium hydraulic pressed connecting pipe center thickness is dfe+Δdfe, steel core twisted wire pitch diameter of thread radius of circle is R+ Δ R, aluminium
Pipe central diameter is with a thickness of dal+Δdal
After press pressure releases after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe, each thickness increment relationship is
ΔrfeΔ R=Δ dal (5)
After then press pressure releases after steel anchor aluminium hydraulic pressed connecting pipe crimping molding, steel core, embedding aluminum pipe, the pressure between steel anchor aluminium hydraulic pressed connecting pipe
Stress are as follows:
In formula (7):
σ1After press pressure releases after the crimping molding of ----steel anchor,
Steel core, embedding aluminum pipe, the compression between steel anchor, unit pa；
σ --- before press pressure releases after the crimping molding of-steel anchor,
Steel core, embedding aluminum pipe, the compression between steel anchor, unit pa；
rfeInside radius after the crimping of ----steel anchor, unit mm；
R---- steel core twisted wire pitch diameter of thread d2Half, unit mm；
dal----embedding aluminum pipe equivalent thickness, unit mm；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy.
Embedding aluminum pipe thickness and length:
Aluminium amount s after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe between embedding aluminum pipe insertion steel strand wires:
In formula (8), r---- steel core twisted wire steel wire radius, unit mm；
It is embedded in the aluminum pipe thickness needed
In formula (9), r---- steel core twisted wire steel wire radius, unit mm；
Then embedding aluminum pipe is with a thickness of δal, unit mm:
δal=δq+1 (10)
(3) embedding aluminum pipe outer diameter DalFor
Dal=6r+1+2 δal (11)
In formula (11), r---- steel core twisted wire steel wire radius, unit mm；
Embedding aluminum pipe length is a steel core twisted wire pitch.
Steel anchor aluminium hydraulic pressed connecting pipe uses the trade mark for Q345 high-strength steel, and steel anchor crimps tube thickness δfeFor
In formula (12)
Fb----conducting wire (or ground wire) calculates Fracture Force, unit N；
σsfe----steel anchor yield strength, unit Mpa；
DalThe embedding aluminum pipe outer diameter of ----steel core, unit mm；
Then steel anchor crimping pipe outside diameter is
Dfe=Dal+2δfe (13)
It is identical as embedding aluminum pipe length that steel anchor crimps length of tube.
A kind of compression bonding method of 7 strands embedding aluminium strain clamp crimping structure of steel strand wires, crimp crimp area of section are as follows:
Steel core crimps sectional area sx
In formula (14), r---- steel core twisted wire steel wire radius, unit mm；
Embedding aluminum pipe section sqFor
In formula (15),
R---- steel core twisted wire steel wire radius, unit mm；
DalThe embedding aluminum pipe outer diameter of ----steel core, unit mm；
Steel anchor aluminium hydraulic pressed connecting pipe sectional area sgFor
In formula (24), Dsl=Dal+1
Dfe----steel anchor outer diameter, unit mm；
Dsl----steel anchor internal diameter, unit mm；
DalThe embedding aluminum pipe outer diameter of ----steel core, unit mm；
Crimp crimps area of section syFor
sy=sx+sq+sg (17)
Regular hexagon pressing mold side length α is
Regular hexagon pressing mold diagonal line b is
B=a+2acos60 °=2a (19).
Safe working temperature range after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe:
If environment temperature is t when splicing sleeve is installed0, the linear expansion coefficient of steel core and steel anchor aluminium hydraulic pressed connecting pipe is afe, embedding aluminum pipe line
The coefficient of expansion is aal, when running temperature is t1When
Steel core radial expansion amount
ΔRt=Rafe(t1-t0) (20)
Embedding aluminum pipe swell increment
Δdalt=dalaal(t1-t0) (21)
Steel anchor crimps bore swell increment
Δrfet=rfeafe(t1-t0) (22)
Safe working temperature
When temperature increases:
I.e. splicing sleeve running temperature incrementss should meet
In formula (31)
σ1After press pressure releases after the crimping molding of steel anchor, steel core, embedding aluminum pipe, the compression between steel anchor, unit
pa；
Before press pressure releases after σ-steel anchor crimping molding, steel core, embedding aluminum pipe, the compression unit pa between steel anchor；
rfeInside radius after the crimping of ----steel anchor, unit mm；
The half of R---- steel core steel strand wires pitch diameter of thread d2, unit mm；
dal----embedding aluminum pipe equivalent thickness, unit mm；
EfeThe Young's modulus of ----steel, unit mm；
EalThe Young's modulus of ----aluminium alloy, unit mm；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium；
When temperature reduces:
That is steel anchor aluminium hydraulic pressed connecting pipe running temperature reduction amount should meet
In formula (26)
Fb----conducting wire (or ground wire) calculates Fracture Force, unit pa；
σ1After the crimping molding of ----steel anchor after press pressure Xie Chu, steel core, embedding aluminum pipe, the compression between steel anchor are single
Position pa；
σ --- before press pressure releases after the crimping molding of-steel anchor, steel core, embedding aluminum pipe, the compression between steel anchor, unit
pa；
rfeInside radius after the crimping of ----steel anchor, unit mm；
R---- steel core steel strand wires pitch diameter of thread d2Half, unit mm；
dal----embedding aluminum pipe equivalent thickness, unit mm；
EfeThe Young's modulus of ----steel, unit Gpa；
EalThe Young's modulus of ----aluminium alloy, unit GPa；
R---- steel core twisted wire steel wire radius, unit mm；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium.
Example calculation
Table 1, steel strand wires parameter
Table 2, embedding aluminum pipe parameter calculate
Table 3, steel anchor aluminium hydraulic pressed connecting pipe parameter calculate
Table 4, steel anchor pressing mold parameter calculate
Table 5, safe operating temperature calculate
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 (8)
1. a kind of 7 embedding aluminium strain clamp crimping structures of strand steel strand wires, it is characterised in that: including steel anchor aluminium hydraulic pressed connecting pipe (1) and embedding aluminium
It manages (2), embedding aluminum pipe (2) is embedded into steel anchor aluminium hydraulic pressed connecting pipe (1), and wraps up the concentric turntable sky of round wires for penetrating connection strain clamp end
7 strand steel strand wires (3) of conducting wire, crimping steel anchor aluminium hydraulic pressed connecting pipe (1) make embedding aluminum pipe (2) fit closely round wires concentric gallows empty conductor 7
Root twists steel strand wires (3) and forms steel strand wires tension resisting connector.
2. a kind of embedding aluminium strain clamp crimping structure of 7 strands steel strand wires according to claim 1, it is characterised in that: embedding aluminium
Pipe (2) length is a steel core twisted wire pitch.
3. a kind of compression bonding method of 7 strands embedding aluminium strain clamp crimping structure of steel strand wires according to claim 1 to 2,
It is characterized by: method includes the following steps:
1) embedding aluminum pipe is embedded into steel anchor aluminium hydraulic pressed connecting pipe；
2) steel strand wires are inserted into from embedding aluminum pipe one end, and steel strand wires is inserted into wire clamp anchor ring bottom；
3) steel anchor aluminium hydraulic pressed connecting pipe is crimped using crimp, so that embedding aluminum pipe tightly engages steel strand surface and filling steel anchor and steel twist
Gap forms steel strand wires tension resisting connector between line.
4. a kind of compression bonding method of 7 strands embedding aluminium strain clamp crimping structure of steel strand wires according to claim 3, feature
It is: crimps stress after the crimping steel anchor aluminium hydraulic pressed connecting pipe of crimp: press machine non-stopping time after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe, steel anchor
Aluminium hydraulic pressed connecting pipe inside radius is rfe, steel anchor aluminium hydraulic pressed connecting pipe center thickness is dfe, the steel core twisted wire pitch diameter of thread is d2, aluminum pipe central diameter with a thickness of
dal；
According to the relationship of material trus stress σ and true strain ε
σ=E ε (1)
In formula (1), E---- is the Young's modulus of material；
After press machine shutdown is removed after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe, if aluminum pipe wall compression chord is σ1, steel anchor aluminium hydraulic pressed connecting pipe inside radius
For rfe+Δrfe, steel anchor aluminium hydraulic pressed connecting 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
With a thickness of dal+Δdal
After press pressure releases after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe, each thickness increment relationship is
ΔrfeΔ R=Δ dal (5)
After then press pressure releases after steel anchor aluminium hydraulic pressed connecting pipe crimping molding, steel core, embedding aluminum pipe, the compression between steel anchor aluminium hydraulic pressed connecting pipe
Are as follows:
In formula (7):
σ1After press pressure releases after the crimping molding of ----steel anchor,
Steel core, embedding aluminum pipe, the compression between steel anchor, unit pa；
σ --- before press pressure releases after the crimping molding of-steel anchor,
Steel core, embedding aluminum pipe, the compression between steel anchor, unit pa；
rfeInside radius after the crimping of ----steel anchor, unit mm；
R---- steel core twisted wire pitch diameter of thread d2Half, unit mm；
dal----embedding aluminum pipe equivalent thickness, unit mm；
EfeThe Young's modulus of ----steel；
EalThe Young's modulus of ----aluminium alloy.
5. a kind of compression bonding method of 7 strands embedding aluminium strain clamp crimping structure of steel strand wires according to claim 3, feature
It is: embedding aluminum pipe thickness and length:
Aluminium amount s after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe between embedding aluminum pipe insertion steel strand wires:
In formula (8), r---- steel core twisted wire steel wire radius, unit mm；
It is embedded in the aluminum pipe thickness needed
In formula (9), r---- steel core twisted wire steel wire radius, unit mm；
Then embedding aluminum pipe is with a thickness of δal, unit mm:
δal=δq+1 (10)
(3) embedding aluminum pipe outer diameter DalFor
Dal=6r+1+2 δal (11)
In formula (11), r---- steel core twisted wire steel wire radius, unit mm；
Embedding aluminum pipe (2) length is a steel core twisted wire pitch.
6. a kind of compression bonding method of 7 strands embedding aluminium strain clamp crimping structure of steel strand wires according to claim 3, feature
Be: steel anchor crimps tube thickness δfeFor
In formula (12)
Fb----conducting wire (or ground wire) calculates Fracture Force, unit N；
σsfe----steel anchor yield strength, unit Mpa；
DalThe embedding aluminum pipe outer diameter of ----steel core, unit mm；
Then steel anchor crimping pipe outside diameter is
Dfe=Dal+2δfe (13)
It is identical as embedding aluminum pipe length that steel anchor crimps length of tube.
7. a kind of compression bonding method of 7 strands embedding aluminium strain clamp crimping structure of steel strand wires according to claim 3, feature
Be: crimp crimps area of section are as follows:
Steel core crimps sectional area sx
In formula (14), r---- steel core twisted wire steel wire radius, unit mm；
Embedding aluminum pipe section sqFor
In formula (15),
R---- steel core twisted wire steel wire radius, unit mm；
DalThe embedding aluminum pipe outer diameter of ----steel core, unit mm；
Steel anchor aluminium hydraulic pressed connecting pipe sectional area sgFor
In formula (24), Dsl=Dal+1
Dfe----steel anchor outer diameter, unit mm；
Dsl----steel anchor internal diameter, unit mm；
DalThe embedding aluminum pipe outer diameter of ----steel core, unit mm；
Crimp crimps area of section syFor
sy=sx+sq+sg (17)
Regular hexagon pressing mold side length α is
Regular hexagon pressing mold diagonal line b is
B=a+2a cos60 °=2a (19).
8. a kind of compression bonding method of 7 strands embedding aluminium strain clamp crimping structure of steel strand wires according to claim 3, feature
It is: safe working temperature range after the crimping molding of steel anchor aluminium hydraulic pressed connecting pipe:
If environment temperature is t when splicing sleeve is installed0, the linear expansion coefficient of steel core and steel anchor aluminium hydraulic pressed connecting pipe is afe, embedding aluminium line expansion
Coefficient is aal, when running temperature is t1When
Steel core radial expansion amount
ΔRt=Rafe(t1-t0) (20)
Embedding aluminum pipe swell increment
Δdalt=dalaal(t1-t0) (21)
Steel anchor crimps bore swell increment
Δrfet=rfeafe(t1-t0) (22)
Safe working temperature
When temperature increases:
I.e. splicing sleeve running temperature incrementss should meet
In formula (31)
σ1After press pressure releases after the crimping molding of ----steel anchor, steel core, embedding aluminum pipe, the compression between steel anchor, unit pa；
σ --- before press pressure releases after the crimping molding of-steel anchor, steel core, embedding aluminum pipe, the compression unit pa between steel anchor；
rfeInside radius after the crimping of ----steel anchor, unit mm；
R---- steel core steel strand wires pitch diameter of thread d2Half, unit mm；
dal----embedding aluminum pipe equivalent thickness, unit mm；
EfeThe Young's modulus of ----steel, unit mm；
EalThe Young's modulus of ----aluminium alloy, unit mm；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium；
When temperature reduces:
That is steel anchor aluminium hydraulic pressed connecting pipe running temperature reduction amount should meet
In formula (26)
Fb----conducting wire (or ground wire) calculates Fracture Force, unit pa；
σ1After the crimping molding of ----steel anchor after press pressure Xie Chu, steel core, embedding aluminum pipe, the compression between steel anchor, unit pa；
σ --- before press pressure releases after the crimping molding of-steel anchor, steel core, embedding aluminum pipe, the compression between steel anchor, unit pa；
rfeInside radius after the crimping of ----steel anchor, unit mm；
R---- steel core steel strand wires pitch diameter of thread d2Half, unit mm；
dal----embedding aluminum pipe equivalent thickness, unit mm；
EfeThe Young's modulus of ----steel, unit Gpa；
EalThe Young's modulus of ----aluminium alloy, unit GPa；
R---- steel core twisted wire steel wire radius, unit mm；
afeThe linear expansion coefficient of ----steel；
aalThe linear expansion coefficient of ----aluminium.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112531437A (en) * | 2020-12-18 | 2021-03-19 | 陕西航空电气有限责任公司 | Method for determining process size of cold-drawn trapezoidal copper bar |
| CN112928572A (en) * | 2020-12-25 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | Cable and wire core wiring method thereof |
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| CN101719647A (en) * | 2009-12-21 | 2010-06-02 | 中国电力科学研究院 | Strain clamp for large-section lead |
| CN109494544A (en) * | 2019-01-09 | 2019-03-19 | 贵州电网有限责任公司 | A kind of 7 strand steel strand wires of aerial condutor dock embedding aluminium crimping structure and method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719647A (en) * | 2009-12-21 | 2010-06-02 | 中国电力科学研究院 | Strain clamp for large-section lead |
| CN109494544A (en) * | 2019-01-09 | 2019-03-19 | 贵州电网有限责任公司 | A kind of 7 strand steel strand wires of aerial condutor dock embedding aluminium crimping structure and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531437A (en) * | 2020-12-18 | 2021-03-19 | 陕西航空电气有限责任公司 | Method for determining process size of cold-drawn trapezoidal copper bar |
| CN112928572A (en) * | 2020-12-25 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | Cable and wire core wiring method thereof |
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