CN105896429A - Construction method for reducing temperature rise at electrician busbar lap joint part - Google Patents
Construction method for reducing temperature rise at electrician busbar lap joint part Download PDFInfo
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- CN105896429A CN105896429A CN201610240643.2A CN201610240643A CN105896429A CN 105896429 A CN105896429 A CN 105896429A CN 201610240643 A CN201610240643 A CN 201610240643A CN 105896429 A CN105896429 A CN 105896429A
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- busbar
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- connecting column
- electrician
- temperature rise
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- 238000010276 construction Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 claims description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims description 13
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 239000004411 aluminium Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 241000530268 Lycaena heteronea Species 0.000 claims description 4
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/10—Cooling
Landscapes
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
The invention discloses a construction method for reducing temperature rise at an electrician busbar lap joint part, belonging to the field of electrical equipment, and specifically relates to construction and installation of an electrician busbar. The connection column is provided with a first cylindrical portion which is in interference fit with a pre-drilled hole in an electrician busbar, wherein the first cylindrical portion is provided with conductivity; a second cylindrical portion with conductivity is coaxially arranged in the first cylindrical portion; the first cylindrical portion is in interference fit with the second cylindrical portion; and the thermal expansion coefficient of the second cylindrical portion is greater than the thermal expansion coefficient of the first cylindrical portion. The connection column has the advantages that 1) the same lap joint length can generate larger conductive area, so that the current density can be reduced and the low temperature rise of the busbar can be realized; 2) the use level of the busbar is reduced so that the resource is saved; 3) the electric clearance or the phase spacing can be enlarged, so that the electrical safety of equipment is improved; and 4) the wiring width of the busbar is reduced, so that the occupied space of the busbar can be reduced.
Description
Technical field
The present invention relates to field of electrical equipment, be specifically related to the construction and installation mode of a kind of power bus-bar.
Background technology
In field of power distribution, the connection of two power bus-bars generally uses overlapping splicing processes, fastens with bolt the most again.Such as the upper semisection of Fig. 1, such coupling method needs two busbar overlap certain lengths, so that the electric current density of contact surface maintains in certain limit value, so that the temperature rise of connection place meets relevant criterion.In order to make power equipment temperature rise low, it usually needs increase the length that busbar is overlapping, make contact area increase, and then make the electric current density of contact surface reduce, finally make equipment have relatively low temperature rise.And increase overlap length and can strengthen the consumption of busbar, and then increase the manufacturing cost of equipment.The bolt fastened can make the electric clearance between busbar or phase spacing reduce, and in order to make electric clearance or phase spacing keep constant, needs to strengthen the spacing of busbar, and strengthens busbar spacing and necessarily cause busbar to take up room change greatly.
How construction and installation could increase contact area and make busbar temperature rise low busbar, but do not reduce electric clearance or phase spacing, and do not strengthen busbar and take up room.
Summary of the invention
It is an object of the invention to solve the problems referred to above, and a kind of construction method reducing the temperature rise of electrician busbar lap-joint is provided.
To this end, a kind of construction method reducing the temperature rise of electrician busbar lap-joint that the present invention provides, it is included on busbar the step processing hole, further comprising the steps of:
A. the end face at first, second busbar processes hole along the length direction of busbar, and hole is blind hole, makes aperture be slightly less than the external diameter of connecting column, and the degree of depth of blind hole is slightly larger than the length of 0.5 times of connecting column；
B. heat in the connection place of the first busbar, make connection place temperature between 50-80 DEG C；
C., in hole connecting column inserting step a processed, connecting column and hole interference fit are made；
D., after the first busbar cooling, heat in the connection place of the second busbar, make connection place temperature between 50-80 DEG C；
E. make the blind hole on the second busbar align with the connecting column on the first busbar, then the second busbar is inserted in connecting column, make the end face of the first busbar and the end face laminating of the second busbar；
F. processing spacing hole in the side of first, second busbar along busbar width, make spacing hole run through connecting column, the aperture of spacing hole is slightly less than the external diameter of pin；
G. by the spacing hole in pin inserting step f, pin and spacing hole interference fit are made.
Beneficial effect
Use busbar construction installation method disclosed by the invention can bring following beneficial effect.
The most identical lap of splice produces more conductive area, and then reduces electric current density, it is achieved the low-temperature-rise of busbar.
2., without busbar being carried out overlapping overlap joint, reducing the consumption of busbar, having saved resource.
3., owing to eliminating fastening bolt and nut, so increasing electric clearance or phase spacing, improve the electrical security of equipment.
4., owing to eliminating fastening bolt and nut, so reducing the wiring width of busbar, taking up room of busbar can be reduced.
Accompanying drawing explanation
In explanation below in reference to the accompanying drawing embodiment to being given as non-limiting example, the present invention and superiority thereof will be better understood, accompanying drawing is as follows:
Fig. 1 is the contrast axonometric chart of existing busbar connecting mode and connecting mode disclosed by the invention；
Fig. 2 is the fragmentary perspective cross sectional view of connecting column disclosed by the invention；
Fig. 3 is Fig. 1 top view；
Fig. 4 is the axonometric chart of connecting column disclosed by the invention；
Fig. 5 is the perspective cut-away view of Fig. 1 busbar disclosed by the invention connection place；
Fig. 6 is the exploded perspective view of Fig. 5；
Fig. 7 is Fig. 5 pin exploded perspective view；
Fig. 8 is the exploded perspective view of Fig. 4；
Fig. 9-11 is the arrangement schematic diagram of connecting column disclosed by the invention；
Figure 12 is the afterbody axonometric chart with the pin of screwed hole；
Figure 13 is busbar axonometric chart；
Figure 14 is the axonometric chart of connecting column；
Figure 15 is the perspective cut-away view of Figure 14；
Figure 16-19 is the block diagram of construction method disclosed by the invention；
Description of reference numerals
1. the first columnar part；2. the second columnar part；3. the first side；4. the second side；5. end face；6. the first perforation；7. the second through hole.
Detailed description of the invention
R in present specification represents radius.
As shown in Figure 1, Figure 3, the first half is the connecting mode that existing three-phase distribution busbar is conventional, after two busbar overlap certain lengths, then the two is fastened with screw bolt and nut.Lower half is busbar connecting mode disclosed by the invention, and in order to strengthen the contrast effect of two kinds of connecting modes, connecting mode disclosed by the invention is set directly at the lower section of existing connecting mode.Two kinds of connecting modes the lap of splice the same, be all L5, be presented as: the overlap length of two busbars under existing connecting mode is L5, the length of the connecting column under connecting mode disclosed by the invention is also L5.
As shown in Figure 3, the directly perceived change that two kinds of connecting modes bring is exactly the significant change of relative dimensions, L1 is the electric clearance under existing connecting mode, L2 is the electric clearance under connecting mode disclosed by the invention, L3 is that the busbar under existing connecting mode takies width, and L4 is that the busbar under connecting mode disclosed by the invention takies width.L2 is significantly greater than L1, and the size of increase is about the twice of busbar thickness, bolt head height, height of nut and bolt tail and highlights the height of nut.L4 is significantly less than L3, and the size of reduction is about bolt head height, height of nut and bolt tail and highlights the height of nut.Therefore, the factor (electric clearance) that power equipment is favourable is improved, and factor disadvantageous to power equipment (taking up room) is reduced.
As shown in Figure 4, a kind of connecting column disclosed by the invention, it has columned profile, and end is provided with chamfering convenient for assembly.
As in figure 2 it is shown, be coaxially disposed the first columnar part 2 in the first columnar part 1, the first columnar part 1 and the first columnar part 2 interference fit.
As shown in Figure 8, the first columnar part 2 has solid construction, and the first columnar part 1 has the structure of hollow, and the first columnar part 2 runs through the first columnar part 1, and the ratio of the external diameter of the first columnar part 2 and the external diameter of the first columnar part 1 is 0.5-0.8.First and second columnar part 1,2 all has electric conductivity, and the coefficient of thermal expansion of the first columnar part 2 is more than the coefficient of thermal expansion of the first columnar part 1, and the resistivity of the first columnar part 2 is more than the resistivity of the first columnar part 1.
After connecting column is assemblied in busbar, due to the pre-manufactured hole interference fit of the first columnar part 1 with busbar, so, the first columnar part 1 and busbar fit tightly, and the first columnar part 1 of connecting column fully carries electric current.Due to the first columnar part 1 and the first columnar part 2 also interference fit, so the first columnar part 1 and the first columnar part 2 also fit tightly, the first columnar part 2 the most fully carries electric current.nullTherefore，The heat effect of the first columnar part 1 and the first columnar part 2 can give full play to，Resistivity due to the first columnar part 2 is more than the resistivity of the first columnar part 1，So the temperature of the first columnar part 2 can be higher than the first columnar part 1，Coefficient of thermal expansion due to the first columnar part 2 is more than the coefficient of thermal expansion of the first columnar part 1，Therefore，In the case of temperature and coefficient of thermal expansion are the most relatively high，The radially enlarged phenomenon of the first columnar part 2 can be significantly greater than the radially enlarged phenomenon of the first columnar part 1，Therefore the first columnar part 2 can fit tightly the first columnar part 1 and apply radially outer pressure to the first columnar part 1，The radial dimension thus making the first columnar part 1 the most outwards becomes big，Ultimately result in the first columnar part 1 more to fit tightly with busbar pre-manufactured hole，The most also radially outer pressure is provided to pre-manufactured hole，I.e. pressure ratio connecting column between connecting column and busbar is bigger when just assembling，Increasing contact pressure can also make the temperature rise of contact site reduce.
As can be seen here, the coupling of interference fit, the coupling of resistivity and the coefficient of thermal expansion between each feature has obvious action to the temperature rise reducing busbar connection place, effect between three is complementary, originally interference fit makes resistivity and coefficient of thermal expansion have the basis played a role, and the effect that resistivity and coefficient of thermal expansion produce exacerbates interference fit, finally so that the contact pressure of connection place strengthens.
As shown in figure 11, cross section is foursquare busbar, and centre is provided with a pre-manufactured hole receiving connecting column, and the distance of pre-manufactured hole circumference to bus bar edge is R, and busbar width is L6.When using existing overlapping splicing processes to couple, the conductive area of connection place is
S1=L6xL5=(R+2R+R) xL5=4RxL5(L5 is the lap of splice, as shown in Figure 3)
And when using connecting column to couple, the conductive area of connection place is
S2=2πRxL5
Therefore,
S2: S1=2πR: 4R=π/2≈1.57
So, use the mode of connecting column overlap joint can obtain more contact area.Obviously, under conditions of meeting mechanical strength, increase the diameter of pre-manufactured hole, reduce hole back gauge and can obtain bigger contact area.
As shown in Figure 10, cross section is rectangular busbar, and centre arranges 6 pre-manufactured holes receiving connecting column, and the distance of pre-manufactured hole circumference to bus bar edge is R, and the beeline between each hole is R, and busbar width is L6.When using existing overlapping splicing processes to couple,
The conductive area of connection place is
S1=L6xL5=(7R+6x2R)xL5=19RxL5
And when using connecting column to couple, the conductive area of connection place is
S2=6x2πRxL5=12πRxL5
Therefore,
S2: S1=12πR: 19R=12π/19≈1.98
So, use the mode of connecting column overlap joint can obtain more contact area.Obviously, under conditions of meeting mechanical strength, increase the diameter of pre-manufactured hole, reduce hole back gauge and can obtain bigger contact area.
As it is shown in figure 9, cross section is rectangular busbar, centre arranges 6 pre-manufactured holes receiving connecting column, and the distance of pre-manufactured hole circumference to bus bar edge is 1.5R, and the beeline between each hole is R, and busbar width is L6.When using existing overlapping splicing processes to couple,
The conductive area of connection place is
S1=L6xL5=(1.5R+5R+1.5R+6x2R) xL5=20RxL5,
And when using connecting column to couple, the conductive area of connection place is
S2=6x2πRxL5=12πRxL5
Therefore,
S2: S1=12πR: 20R=12π/20≈1.88
So, use the mode of connecting column overlap joint can obtain more contact area.Obviously, under conditions of meeting mechanical strength, increase the diameter of pre-manufactured hole, reduce hole back gauge and can obtain bigger contact area.
Therefore, connecting column disclosed by the invention creates the good effect of two aspects, and one is the increase in contact pressure, two is to have increased considerably conductive area, under the common effect of the two active factor, the temperature rise of connection place is greatly lowered, it is achieved that the purpose of the present invention.
As it is shown in figure 5, the fragmentary perspective cross sectional view of the connection place of busbar construction installation method disclosed by the invention, the material of the first columnar part 1 of connecting column is copper, and the material of the first columnar part 2 is aluminum.
The construction procedure of busbar is as follows:
A. first, second busbar end face along busbar length direction process hole, hole is blind hole, aperture is made to be slightly less than the external diameter of connecting column to realize interference fit, the degree of depth of blind hole is slightly larger than the length of 0.5 times of connecting column, when after the first and second busbar docking, connecting column is close to pre-manufactured hole matched in clearance in the axial direction, beneficially two busbar end faces；In the chamfering of the end of blind hole assembling easy to process connecting column, see Figure 16.
B. heat in the connection place of the first busbar, make connection place temperature between 50-80 DEG C.
C., in hole connecting column inserting step a processed, make connecting column and hole interference fit, see Figure 17.
D., after the first busbar cooling, heat in the connection place of the second busbar, make connection place temperature between 50-80 DEG C.
E. make the blind hole on the second busbar align with the connecting column on the first busbar, then the second busbar is inserted in connecting column, make the end face 5 of the first busbar and the end face 5 of the second busbar fit, see Figure 18.
F. processing spacing hole in the side 3,4 of first, second busbar along busbar width, make spacing hole run through connecting column, the aperture of spacing hole is slightly less than the external diameter of pin, sees Figure 19.
G. by the spacing hole in pin inserting step f, seeing Fig. 7, make pin and spacing hole interference fit, after pin assembling puts in place, can limit mutual the moving axially of first, second busbar, finally make connecting column, busbar, pin three firmly couples simultaneously.
The construction procedure of connecting column is as follows:
A. providing an aluminium bar and a copper pipe, make the external diameter internal diameter slightly larger than copper pipe of aluminium bar, the length of the two is identical, and the external diameter of aluminium bar is 0.5-0.8 with the ratio of the internal diameter of copper pipe.
B. copper pipe is heated so that it is temperature is between 50-80 DEG C.
C. aluminium bar is inserted in copper pipe, make the two interference fit.
Dismantle for the ease of the later stage, when needs dismounting busbar, easily pin can be dismantled by the screwed hole of pin afterbody at the afterbody thread mill drilling (see Figure 12) of pin, and then by two busbar separation (see figure 6)s.
As shown in figure 13, in order to distinguish each face of busbar, end face 5 is defined as the thickness with busbar and the face of width composition, i.e. identify the face of 5 in Figure 13.Side is defined as the thickness with busbar and the face of length composition, i.e. identifying the face of 3,4 in figure, and 3 is the first side, and 4 is the second side.
Embodiment two
Copper pipe in embodiment one is changed to copper alloy tube, aluminium bar changes to aluminium alloy bars, owing to the hardness of alloy is more relatively high, first aluminium alloy bars can be preserved under low temperature environment (5 degree) a period of time (5 minutes), and copper alloy tube preserves a period of time (5 minutes) under hot environment (80 degree), by effect of expanding with heat and contract with cold, the internal diameter that can make copper alloy tube slightly becomes big, and the external diameter of aluminium alloy bars slightly diminishes, and then easily aluminium alloy bars is assembled in copper alloy tube, after the connecting column prepared to be installed recovers room temperature, copper alloy tube and aluminium alloy bars can realize interference fit.The diameter of connecting column disclosed by the invention and length have different size specification, to adapt to the needs of different busbar size.
The construction procedure of connecting column is as follows:
A. providing an aluminium alloy bars and a copper alloy tube, enable aluminum alloy to the external diameter internal diameter slightly larger than copper alloy tube of rod, the length of the two is identical, and the external diameter of aluminium alloy bars is 0.5-0.8 with the ratio of the internal diameter of copper alloy tube.
B. copper alloy tube is heated so that it is temperature is between 50-80 DEG C.
C. aluminium alloy bars is inserted in copper pipe, make the two interference fit.
Claims (8)
1. reducing a construction method for electrician busbar lap-joint temperature rise, it is included on busbar the step processing hole, it is characterised in that
A. the end face at first, second busbar processes hole along the length direction of busbar, and hole is blind hole, makes aperture be slightly less than the external diameter of connecting column, and the degree of depth of blind hole is slightly larger than the length of 0.5 times of connecting column；
B. heat in the connection place of the first busbar, make connection place temperature between 50-80 DEG C；
C., in hole connecting column inserting step a processed, connecting column and hole interference fit are made；
D., after the first busbar cooling, heat in the connection place of the second busbar, make connection place temperature between 50-80 DEG C；
E. make the blind hole on the second busbar align with the connecting column on the first busbar, then the second busbar is inserted in connecting column, make the end face of the first busbar and the end face laminating of the second busbar；
F. processing spacing hole in the side of first, second busbar along busbar width, make spacing hole run through connecting column, the aperture of spacing hole is slightly less than the external diameter of pin；
G. by the spacing hole in pin inserting step f, pin and spacing hole interference fit are made.
A kind of construction method reducing the temperature rise of electrician busbar lap-joint the most according to claim 1, it is characterised in that the construction procedure of connecting column includes:
A. providing an aluminium bar and a copper pipe, make the external diameter internal diameter slightly larger than copper pipe of aluminium bar, the length of the two is identical；
B. copper pipe is heated so that it is temperature is between 50-80 DEG C；
C. aluminium bar is inserted in copper pipe, make the two interference fit.
A kind of construction method reducing the temperature rise of electrician busbar lap-joint the most according to claim 1, it is characterised in that the construction procedure of connecting column includes:
A. providing an aluminium alloy bars and a copper alloy tube, enable aluminum alloy to the external diameter internal diameter slightly larger than copper alloy tube of rod, the length of the two is identical；
B. copper alloy tube is heated so that it is temperature is between 50-80 DEG C；
C. aluminium alloy bars is inserted in copper pipe, make the two interference fit.
A kind of construction method reducing the temperature rise of electrician busbar lap-joint the most according to claim 2, it is characterised in that the external diameter of aluminium bar is 0.5-0.8 with the ratio of the internal diameter of copper pipe.
A kind of construction method reducing the temperature rise of electrician busbar lap-joint the most according to claim 3, it is characterised in that the external diameter of aluminium alloy bars is 0.5-0.8 with the ratio of the internal diameter of copper alloy tube.
A kind of construction method reducing the temperature rise of electrician busbar lap-joint the most according to claim 1, it is characterised in that the distance of the circumference of described blind hole to bus bar edge is the radius of blind hole.
A kind of construction method reducing the temperature rise of electrician busbar lap-joint the most according to claim 1, it is characterised in that the distance of the circumference of described blind hole to bus bar edge is the radius of 1.5 times of blind holes.
A kind of construction method reducing the temperature rise of electrician busbar lap-joint the most according to claim 1, it is characterised in that processing multiple blind hole on the end face of busbar, the beeline between each hole is the radius of blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610240643.2A CN105896429B (en) | 2016-04-18 | 2016-04-18 | Reduce the construction method of electrician's busbar lap-joint temperature rise |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610240643.2A CN105896429B (en) | 2016-04-18 | 2016-04-18 | Reduce the construction method of electrician's busbar lap-joint temperature rise |
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| CN105896429B CN105896429B (en) | 2017-10-20 |
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| WO2020164641A1 (en) * | 2019-08-16 | 2020-08-20 | 龚柱 | Electrical busbar joining method, joining platform, and operation method for said joining platform |
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| CN111801853A (en) * | 2019-08-16 | 2020-10-20 | 龚柱 | Power bus bar butt joint method, butt joint platform and platform operation method thereof |
| GB2590527A (en) * | 2019-08-16 | 2021-06-30 | Zhu Gong | Electrical busbar joining method, joining platform, and operation method for said joining platform |
| CN111801853B (en) * | 2019-08-16 | 2021-07-09 | 泉州睿郎机电技术有限公司 | Power bus-bar butt-joint platform |
| GB2590527B (en) * | 2019-08-16 | 2021-11-17 | Zhu Gong | Operation method for operating busbar docking platform |
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| Publication number | Publication date |
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| CN105896429B (en) | 2017-10-20 |
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