CN105896429B - Reduce the construction method of electrician's busbar lap-joint temperature rise - Google Patents
Reduce the construction method of electrician's busbar lap-joint temperature rise Download PDFInfo
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- CN105896429B CN105896429B CN201610240643.2A CN201610240643A CN105896429B CN 105896429 B CN105896429 B CN 105896429B CN 201610240643 A CN201610240643 A CN 201610240643A CN 105896429 B CN105896429 B CN 105896429B
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- Prior art keywords
- busbar
- hole
- connecting column
- electrician
- columnar part
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Classifications
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- 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
Abstract
The present invention discloses a kind of construction method of reduction electrician's busbar lap-joint temperature rise, belongs to field of electrical equipment, and in particular to a kind of construction and installation of power bus-bar.Connecting column disclosed by the invention has the first columnar part with the pre-manufactured hole interference fit on electrician's busbar, first columnar part is conductive, the second conductive columnar part is coaxially disposed in first columnar part, first columnar part and the second columnar part interference fit, the coefficient of thermal expansion of the second columnar part are more than the coefficient of thermal expansion of the first columnar part.Following beneficial effect can be brought using connecting column disclosed by the invention：1. the identical lap of splice produces more conductive areas, and then reduces current density, the low-temperature-rise of busbar is realized.2. reducing the consumption of busbar, resource has been saved.3. increasing electric clearance or phase spacing, the electrical security of equipment is improved.4. reduce the wiring width of busbar, you can reduce the space-consuming of busbar.
Description
Technical field
The present invention relates to field of electrical equipment, and in particular to a kind of construction and installation mode of power bus-bar.
Background technology
In field of power distribution, the connection of two power bus-bars generally uses overlapping splicing processes, fastened again with bolt afterwards.As schemed
1 upper semisection, such coupling method is needed by the overlapping certain length of two busbars, so that the current density of contact surface maintains one
Determine in value range, so that the temperature rise of connection place meets relevant criterion.In order that power equipment temperature rise is low, it usually needs increase is female
The folded length of re-scheduling, increases contact area, and then reduces the current density of contact surface, equipment is had relatively low temperature
Rise.And the consumption of busbar can be increased by increasing overlap length, and then increase the manufacturing cost of equipment.The bolt of fastening can make busbar
Between electric clearance or phase spacing reduce, in order that electric clearance or phase spacing keep constant, it is necessary to by busbar
Spacing is increased, and is increased busbar spacing and necessarily caused busbar space-consuming to become big.
How construction and installation could increase contact area and make busbar temperature rise low busbar, but not reduce electric clearance or phase
Between distance, and do not increase busbar space-consuming.
The content of the invention
It is an object of the invention to solve the above problems, and provide a kind of construction party of reduction electrician's busbar lap-joint temperature rise
Method.
Therefore, a kind of construction method for reduction electrician busbar lap-joint temperature rise that the present invention is provided, it is included on busbar
The step of processing hole, it is further comprising the steps of：
A. hole is processed in length direction of the end face along busbar of first, second busbar, hole is blind hole, aperture is slightly less than connection
Connect the external diameter of post, length of the depth slightly larger than 0.5 times of connecting column of blind hole；
B. heated in the connection place of the first busbar, make connection place temperature between 50-80 DEG C；
C. connecting column is inserted in the hole of the first busbar step a processing, is interference fitted connecting column and hole；
D. after the first busbar cooling after, the second busbar connection place heat, make connection place temperature between 50-80 DEG C it
Between；
E. the blind hole on the second busbar is alignd with the connecting column on the first busbar, then the second busbar be inserted in connecting column,
Make the end face laminating of the end face and the second busbar of the first busbar；
F. spacing hole is processed along busbar width in the side of first, second busbar, spacing hole is run through connecting column, limit
The aperture in position hole is slightly less than the external diameter of pin；
G. it is interference fitted will in the spacing hole in pin inserting step f, pin and spacing hole.
Beneficial effect
Following beneficial effect can be brought using busbar construction installation method disclosed by the invention.
1. the identical lap of splice produces more conductive areas, and then reduces current density, the low temperature of busbar is realized
Rise.
2. without carrying out overlapping overlap joint to busbar, the consumption of busbar is reduced, resource has been saved.
3. due to eliminating fastening bolt and nut, so increasing electric clearance or phase spacing, improve equipment
Electrical security.
4. due to eliminating fastening bolt and nut, so reducing the wiring width of busbar, you can reduce accounting for for busbar
Use space.
Brief description of the drawings
It is of the invention and its excellent below in reference to accompanying drawing in the explanation of the embodiment provided as non-limiting example
More property will be better understood that accompanying drawing is as follows：
Fig. 1 is the contrast stereogram 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 views；
Fig. 4 is the stereogram of connecting column disclosed by the invention；
Fig. 5 is the perspective cut-away view of Fig. 1 busbar connection places disclosed by the invention；
Fig. 6 is Fig. 5 exploded perspective view；
Fig. 7 is Fig. 5 pin exploded perspective views；
Fig. 8 is Fig. 4 exploded perspective view；
Fig. 9-11 is the arrangement schematic diagram of connecting column disclosed by the invention；
Figure 12 is the stereogram of pin of the afterbody with screwed hole；
Figure 13 is busbar stereogram；
Figure 14 is the stereogram of connecting column；
Figure 15 is Figure 14 perspective cut-away view；
The step of Figure 16-19 is construction method disclosed by the invention is schemed；
Description of reference numerals
1. the first columnar part；2. the second columnar part；3. first side；4. second side；5. end face；6. the first perforation；7.
Second through hole.
Embodiment
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 commonly used, by two busbars overlapping one
After measured length, then with screw bolt and nut the two is fastened.Lower half is busbar connecting mode disclosed by the invention, in order to strengthen two
The contrast effect of connecting mode is planted, connecting mode disclosed by the invention is set directly at the lower section of existing connecting mode.Two kinds of connection
The lap of splice for connecing mode is the same, is all L5, is presented as：The overlap length of two busbars under existing connecting mode is L5,
The length of connecting column under connecting mode disclosed by the invention is also L5.
As shown in figure 3, the change directly perceived that two kinds of connecting modes are brought is exactly the significant change of relative dimensions, L1 is existing
The electric clearance under mode is connect, L2 is the electric clearance under connecting mode disclosed by the invention, under L3 is existing connecting mode
Busbar takes width, and L4 is that the busbar under connecting mode disclosed by the invention takes width.L2 is significantly greater than L1, increased size
About twice of busbar thickness, bolt head height, height of nut and bolt tail protrude the height of nut.L4 is significantly less than
L3, the size of reduction is about the height that bolt head height, height of nut and bolt tail protrude nut.Therefore, to electric power
The favourable factor of equipment（Electric clearance）It is improved, and to the unfavorable factor of power equipment（Space-consuming）Subtracted
It is few.
As shown in figure 4, a kind of connecting column disclosed by the invention, it has columned profile, and end is provided with convenient dress
The chamfering matched somebody with somebody.
As shown in Fig. 2 the second columnar part 2 is coaxially disposed in the first columnar part 1, the first columnar part 1 and the mistake of the second columnar part 2
It is full of cooperation.
As shown in figure 8, the second columnar part 2 has solid construction, the first columnar part 1 has hollow structure, the second column
The first columnar part 1 is run through in portion 2, and the ratio of the external diameter of the external diameter of the second columnar part 2 and the first columnar part 1 is 0.5-0.8.Firstth,
Two columnar parts 1,2 are all conductive, and the coefficient of thermal expansion of the second columnar part 2 is more than the coefficient of thermal expansion of the first columnar part 1, the second post
The resistivity in shape portion 2 is more than the resistivity of the first columnar part 1.
After connecting column is assemblied in busbar, due to the first columnar part 1 and the pre-manufactured hole interference fit of busbar, so, first
Columnar part 1 and busbar are brought into close contact, the first columnar part 1 fully carrying electric current of connecting column.Due to the first columnar part 1 and the second post
Shape portion 2 is also interference fitted, so the first columnar part 1 and the second columnar part 2 are also brought into close contact, the also fully carrying of the second columnar part 2
Electric current.Therefore, the fuel factor of the first columnar part 1 and the second columnar part 2 can give full play to, due to the resistance of the second columnar part 2
Rate is more than the resistivity of the first columnar part 1, so the temperature of the second columnar part 2 can be higher than the first columnar part 1, due to the second column
The coefficient of thermal expansion in portion 2 is more than the coefficient of thermal expansion of the first columnar part 1, therefore, in the case where temperature and coefficient of thermal expansion are all relatively high,
The radially enlarged phenomenon of second columnar part 2 can be significantly greater than the radially enlarged phenomenon of the first columnar part 1, therefore the second columnar part 2
The first columnar part 1 can be brought into close contact and apply radially outer pressure to the first columnar part 1, thus make the footpath of the first columnar part 1
Also outwards become big to size, ultimately result in the first columnar part 1 and be more brought into close contact with busbar pre-manufactured hole, while also being provided to pre-manufactured hole
Pressure ratio connecting column between radially outer pressure, i.e. connecting column and busbar is bigger when just assembling, and increases contact
The temperature rise of contact site, which can be made, to be reduced.
As can be seen here, between each feature interference fit, the matching of resistivity and the matching of coefficient of thermal expansion is to reduction busbar
The temperature rise of connection place has the effect between obvious action, three to be complementary, and interference fit originally causes resistance
Rate and coefficient of thermal expansion have the basis played a role, and the effect that resistivity and coefficient of thermal expansion are produced exacerbates interference fit,
Finally so that the contact of connection place is increased.
As shown in figure 11, cross section is the busbar of square, and centre is provided with the pre-manufactured hole of a receiving connecting column, prefabricated
The distance of hole circumference to bus bar edge is R, and busbar width is L6.When using existing overlapping splicing processes connection, connection place is led
Electric area is
S1=L6xL5=(R+2R+R)xL5=4RxL5（L5 is the lap of splice, as shown in Figure 3）
And when using connecting column connection, the conductive area of connection place is
S2=2πRxL5
Therefore,
S2: S1=2πR: 4R=π/2≈1.57
So, more contacts area can be obtained by the way of connecting column is overlapped.Obviously, the bar of mechanical strength is being met
Under part, increase the diameter of pre-manufactured hole, bigger contact area can be obtained by reducing hole back gauge.
As shown in Figure 10, cross section is rectangular busbar, and centre sets the pre-manufactured hole of 6 receiving connecting columns, pre-manufactured hole
The distance of circumference to bus bar edge is that the beeline between R, each hole is R, and busbar width is L6.When using existing overlapping overlap joint
When method couples,
The conductive area of connection place is
S1=L6xL5=(7R+6x2R)xL5=19RxL5
And when using connecting column connection, the conductive area of connection place is
S2=6x2πRxL5=12πRxL5
Therefore,
S2: S1=12πR: 19R=12π/19≈1.98
So, more contacts area can be obtained by the way of connecting column is overlapped.Obviously, the bar of mechanical strength is being met
Under part, increase the diameter of pre-manufactured hole, bigger contact area can be obtained by reducing hole back gauge.
As shown in figure 9, cross section is rectangular busbar, centre sets the pre-manufactured hole of 6 receiving connecting columns, pre-manufactured hole circle
The distance of thoughtful bus bar edge is that the beeline between 1.5R, each hole is R, and busbar width is L6.Overlapping taken when using existing
When connection couples,
The conductive area of connection place is
S1=L6xL5=(1.5R+5R+1.5R+6x2R) xL5=20RxL5,
And when using connecting column connection, the conductive area of connection place is
S2=6x2πRxL5=12πRxL5
Therefore,
S2: S1=12πR: 20R=12π/20≈1.88
So, more contacts area can be obtained by the way of connecting column is overlapped.Obviously, the bar of mechanical strength is being met
Under part, increase the diameter of pre-manufactured hole, bigger contact area can be obtained by reducing hole back gauge.
Therefore, connecting column disclosed by the invention generates the good effect of two aspects, and one is the increase in contact, two
It is to have increased considerably conductive area, under the collective effect of the two active factors, the temperature rise of connection place is greatly lowered, it is real
The purpose of the present invention is showed.
As shown in figure 5, the fragmentary perspective cross sectional view of the connection place of busbar construction installation method disclosed by the invention, connecting column
The material of the first columnar part 1 be copper, the material of the second columnar part 2 is aluminium.
The construction procedure of busbar is as follows：
A. hole is processed in length direction of the end face along busbar of first, second busbar, hole is blind hole, aperture is slightly less than connection
The external diameter of post is connect to realize interference fit, length of the depth slightly larger than 0.5 times of connecting column of blind hole, when the first and second busbars pair
After connecing, gap coordinates in the axial direction for connecting column and pre-manufactured hole, is conducive to being close to for two busbar end faces；Processed in the end of blind hole
The chamfering of connecting column convenient for assembly, is shown in Figure 16.
B. heated in the connection place of the first busbar, make connection place temperature between 50-80 DEG C.
C. connecting column is inserted in the hole of the first busbar step a processing, is interference fitted connecting column and hole, sees Figure 17.
D. after the first busbar cooling after, the second busbar connection place heat, make connection place temperature between 50-80 DEG C it
Between.
E. the blind hole on the second busbar is alignd with the connecting column on the first busbar, then the second busbar be inserted in connecting column,
The end face 5 of the busbar of end face 5 and second of the first busbar is fitted, see Figure 18.
F. spacing hole is processed along busbar width in the side 3,4 of first, second busbar, makes spacing hole through connection
Post, 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, see Fig. 7, be interference fitted pin and spacing hole, when pin assembling
After in place, the axial movement of first, second busbar each other can be limited, finally makes connecting column, busbar, pin three firmly couples
Simultaneously.
The construction procedure of connecting column is as follows：
A., one aluminium bar and a copper pipe are provided, the external diameter of aluminium bar is slightly larger than the internal diameter of copper pipe, the length of the two is identical,
The ratio of the external diameter of aluminium bar and the external diameter of copper pipe is 0.5-0.8.
B. copper pipe is heated, makes its temperature between 50-80 DEG C.
C. aluminium bar is inserted in copper pipe, is interference fitted the two.
For the ease of the later stage dismantle, can pin afterbody thread mill drilling（See Figure 12）, can when needing dismounting busbar
Easily pin is dismantled by the screwed hole of pin afterbody, and then two busbars are separated（See Fig. 6）.
As shown in figure 13, in order to distinguish each face of busbar, end face 5 is defined as with the thickness and width composition of busbar
The face of mark 5 in face, i.e. Figure 13.Side is defined as the face with the thickness of busbar and length composition, i.e., 3,4 are identified in figure
Face, 3 be first side, and 4 be second side.
Embodiment two
Copper pipe in embodiment one is changed to copper alloy tube, aluminium bar is changed to aluminium alloy bars, due to the hardness phase of alloy
, can be first by aluminium alloy bars in low temperature environment to height（5 degree）It is lower to preserve a period of time（5 minutes）, and copper alloy tube is in high temperature ring
Border（80 degree）It is lower to preserve a period of time（5 minutes）, by effect of expanding with heat and contract with cold, the internal diameter of copper alloy tube can be made slightly to become big, and
The external diameter of aluminium alloy bars slightly diminishes, and then easily aluminium alloy bars is assembled in copper alloy tube, the connecting column to be installed prepared
Recover after normal temperature, copper alloy tube and aluminium alloy bars are that interference fit can be achieved.The diameter and length of connecting column disclosed by the invention
With different dimensions, the need for adapting to different busbar sizes.
The construction procedure of connecting column is as follows：
A. an aluminium alloy bars and a copper alloy tube are provided, the external diameter for enabling aluminum alloy to rod is interior slightly larger than copper alloy tube
Footpath, the length of the two is identical, and the ratio of the external diameter of aluminium alloy bars and the external diameter of copper alloy tube is 0.5-0.8.
B. copper alloy tube is heated, makes its temperature between 50-80 DEG C.
C. aluminium alloy bars is inserted in copper pipe, is interference fitted the two.
Claims (8)
1. a kind of reduce the construction method of electrician's busbar lap-joint temperature rise, it is included in the step of processing hole on busbar, its feature
It is,
A. hole is processed in length direction of the end face along busbar of first, second busbar, hole is blind hole, aperture is slightly less than connecting column
External diameter, the length of the depth of blind hole slightly larger than 0.5 times of connecting column；
B. heated in the connection place of the first busbar, make connection place temperature between 50-80 DEG C；
C. connecting column is inserted in the hole of the first busbar step a processing, is interference fitted connecting column and hole；
D. after after the cooling of the first busbar, heated in the connection place of the second busbar, make connection place temperature between 50-80 DEG C；
E. the blind hole on the second busbar is alignd with the connecting column on the first busbar, then the second busbar is inserted in connecting column, make
The end face laminating of the end face of one busbar and the second busbar；
F. spacing hole is processed along busbar width in the side of first, second busbar, spacing hole is run through connecting column, spacing hole
Aperture be slightly less than the external diameter of pin；
G. it is interference fitted will in the spacing hole in pin inserting step f, pin and spacing hole.
2. a kind of construction method of reduction electrician's busbar lap-joint temperature rise according to claim 1, it is characterised in that connection
The construction procedure of post includes：
A., one aluminium bar and a copper pipe are provided, the external diameter of aluminium bar is slightly larger than the internal diameter of copper pipe, the length of the two is identical；
B. copper pipe is heated, makes its temperature between 50-80 DEG C；
C. aluminium bar is inserted in copper pipe, is interference fitted the two.
3. a kind of construction method of reduction electrician's busbar lap-joint temperature rise according to claim 1, it is characterised in that connection
The construction procedure of post includes：
A. an aluminium alloy bars and a copper alloy tube are provided, the external diameter for enabling aluminum alloy to rod is slightly larger than the internal diameter of copper alloy tube, two
The length of person is identical；
B. copper alloy tube is heated, makes its temperature between 50-80 DEG C；
C. aluminium alloy bars is inserted in copper pipe, is interference fitted the two.
4. a kind of construction method of reduction electrician's busbar lap-joint temperature rise according to claim 2, it is characterised in that aluminium bar
External diameter and copper pipe external diameter ratio be 0.5-0.8.
5. the construction method of a kind of reduction electrician's busbar lap-joint temperature rise according to claim 3, it is characterised in that aluminium is closed
The ratio of the external diameter of golden rod and the external diameter of copper alloy tube is 0.5-0.8.
6. the construction method of a kind of reduction electrician's busbar lap-joint temperature rise according to claim 1, it is characterised in that described
The distance of the circumference of blind hole to bus bar edge is the radius of blind hole.
7. the construction method of a kind of reduction electrician's busbar lap-joint temperature rise according to claim 1, it is characterised in that described
The distance of the circumference of blind hole to bus bar edge is the radius of 1.5 times of blind holes.
8. the construction method of a kind of reduction electrician's busbar lap-joint temperature rise according to claim 1, it is characterised in that in mother
Multiple blind holes are processed on the end face of row, 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 |
Applications Claiming Priority (1)
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|---|---|---|---|
| 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 true CN105896429B (en) | 2017-10-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107017508B (en) * | 2017-04-10 | 2017-11-17 | 龚柱 | Power bus-bar couples instrument |
| CN108258633B (en) * | 2017-04-10 | 2019-12-24 | 泉州睿郎机电技术有限公司 | Pneumatic motor type electric bus bar connecting tool |
| CN110380320B (en) * | 2019-08-16 | 2020-09-22 | 晋江叁井古德工业设计有限公司 | Power bus docking platform and platform operation method thereof |
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| JP3011520B2 (en) * | 1992-02-24 | 2000-02-21 | 株式会社東芝 | Lead-out conductor connection structure of transformer |
| JP2007227267A (en) * | 2006-02-24 | 2007-09-06 | Chugoku Electric Power Co Inc:The | Coaxial cable connector, and coaxial cable and cable connecting clamp provided therewith |
| CN200969410Y (en) * | 2006-06-29 | 2007-10-31 | 上海置信电气股份有限公司 | Transformational structure for transformer low-voltage casing tube wiring terminal |
| CN100452535C (en) * | 2006-08-02 | 2009-01-14 | 浙江开关厂有限公司 | Conductor coupler for high-voltage switch cabinet |
| CN201490656U (en) * | 2009-04-17 | 2010-05-26 | 邱玉兰 | Inner-embedded outer-crimping type metal pipe bus connecting hardware fitting |
| CN101640319B (en) * | 2009-08-27 | 2011-01-26 | 晏新海 | Power transmission bus and bus assembly thereof |
| CN201498611U (en) * | 2009-08-27 | 2010-06-02 | 晏新海 | Bus bar for power transmission |
| CN102856677B (en) * | 2011-06-27 | 2015-05-06 | 泰科电子(上海)有限公司 | Electric connecting device |
| CN202268489U (en) * | 2011-08-11 | 2012-06-06 | 泰科电子(上海)有限公司 | Electrical connection assembly |
| CN102684033B (en) * | 2012-05-19 | 2014-03-05 | 林锐涛 | Thermal shrinkable tube busbar connection method |
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