CN102447239B - Jumper wire support spacer - Google Patents
Jumper wire support spacer Download PDFInfo
- Publication number
- CN102447239B CN102447239B CN201110452224.2A CN201110452224A CN102447239B CN 102447239 B CN102447239 B CN 102447239B CN 201110452224 A CN201110452224 A CN 201110452224A CN 102447239 B CN102447239 B CN 102447239B
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- wire
- eyelet bolt
- clip body
- cover plate
- bearing pin
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Abstract
The invention provides a jumper wire support spacer and relates to a protection device used for maintaining a reasonable gap between a drainage wire and a connected armour clamp, avoiding the fatigue damage of the tension-resisting drainage wire and avoiding the damage caused by whipping and crashing the armour clamp with a lead. The spacer comprises an extending pull rod fixing clip, a lead fixing clip, a fitting nut and a high-strength distance-regulating screw, wherein the extending pull rod fixing clip is provided with a first clip body, a first clip cover plate, a first pin shaft and a first swing bolt group; the first swing bolt group comprises a first swing bolt, a first nut, a third pin shaft, a first gasket, a first elastic cushion; the lead fixing clip is used for fixing the lead and consists of a second clip body, a second clip cover plate, a second pin shaft and a second swing bolt group; and the second swing bolt group comprises a second swing bolt, a second nut, a fourth pin shaft, a second gasket and a second elastic cushion. By using the jumper wire support spacer, the long-term, stable and reliable operation of a circuit can be ensured, and the power failure caused by drainage breakage and crash and friction between the lead and the armour clamp can be avoided.
Description
Technical field
What a kind of jumper wire support spacer of the present invention related to is a kind of for keeping drainage thread and being connected reasonable clearance between gold utensil, avoids strain insulator conduction wire clamp fatigue damage, avoids wire whiplash collision gold utensil to cause a kind of protective device of damage.
Background technology
Along with the development of electrical network, the continuous lifting of transmission capacity and transmission line electric pressure, extra high voltage network is for suppressing corona discharge and reducing line reactance, and multiple fission conductor arises.Every phase multiple fission conductor is comprised of several less intraphase conductors of diameter, each intraphase conductor keeps at a certain distance away and arranges by symmetrical polygonal, can play the effect that is equivalent to increase diameter of wire, the large wire more identical than total cross section, be not easy to produce corona, improve ability of supplying electric power simultaneously.Bundle conductor mainly contains on the circuit that is applied to 330 kilovolts and above voltage.Generally, China's 330 kilovolt adopt 2 bundle conductors, and 500kV adopts 4 divisions, and 750kV, 800kV adopt 6 divisions, and 1000kV adopts 8 divisions.
In order to guarantee drainage thread and to be connected reasonable clearance between gold utensil, to avoid strain insulator conduction wire clamp fatigue damage, avoid wire whiplash collision gold utensil to cause damage, jumper wire support spacer is progressively used widely.And conventional jumpers support spacing rod adopts all-aluminium construction, frequently there is the accidents such as fracture in the screw thread of aluminium matter, causes between upper conductor and lower wire extension rod rubbing, and had a strong impact on the safe and stable operation of transmission line.
Summary of the invention
The object of the invention is provides a kind of jumper wire support spacer for above-mentioned weak point, can guarantee drainage thread and be connected reasonable clearance between gold utensil, avoid strain insulator conduction wire clamp fatigue damage, avoid wire whiplash collision gold utensil to cause damage, and because adopt high strength adjusting screw, possesses the not advantage of easy fracture.
A kind of jumper wire support spacer takes following technical scheme to realize: a kind of jumper wire support spacer comprises extending pull rod fixing clamper, wire fixing clamper, clamp nut and high strength adjusting screw, extending pull rod fixing clamper is used for fixedly extending pull rod, extending pull rod fixing clamper has the first wire clip body, the first wire clamp cover plate, the first bearing pin and the first eyelet bolt group, the first eyelet bolt group comprises the first eyelet bolt, the first nut, the 3rd bearing pin, the first packing ring and the first bullet pad, one end of the first eyelet bolt is passed the first eyelet bolt mounting groove and is fixed on the first wire clip body by the first nut, the first packing ring and the first bullet pad are arranged between the first nut and the first wire clip body, the other end of the first eyelet bolt is provided with pinned hole, the other end of the first eyelet bolt is flexibly connected with the first wire clamp cover plate by the 3rd bearing pin, the first eyelet bolt can freely swing around the 3rd bearing pin being fixed on the first wire clamp cover plate in the first eyelet bolt mounting groove, one end of the first wire clamp cover plate is connected with the first wire clip body by the first bearing pin, and the other end of the first wire clamp cover plate is connected with the first wire clip body by the first eyelet bolt group, till extending pull rod is sandwiched and tightens the first nut to the first bullet pad after fixing clamper and flatten, complete the fixing of extending pull rod, the first described eyelet bolt group can freely swing around the 3rd bearing pin in the first eyelet bolt mounting groove, wire fixing clamper is for fixing cord, wire fixing clamper is by the second wire clip body, the second wire clamp cover plate, the second bearing pin and the second eyelet bolt group, the second eyelet bolt group comprises the second eyelet bolt, the second nut, the 4th bearing pin, the second packing ring and the second bullet pad, one end of the second eyelet bolt is passed the second eyelet bolt mounting groove and is fixed on the second wire clip body by the second nut, the second packing ring and the second bullet pad are arranged between the second nut and the second wire clip body, the other end of the second eyelet bolt is provided with pinned hole, the other end of the second eyelet bolt is flexibly connected with the second wire clamp cover plate by the 4th bearing pin, the second eyelet bolt can freely swing around the 4th bearing pin being fixed on the second wire clamp cover plate in the second eyelet bolt mounting groove, one end of the second wire clamp cover plate is connected with the second wire clip body by the second bearing pin, the other end of the second wire clamp cover plate is connected with the second wire clip body by the second eyelet bolt group, till wire is sandwiched and tightens the second nut to the second bullet pad after wire fixing clamper and flatten, complete the fixing of wire, the second described eyelet bolt group can freely swing around the 4th bearing pin in the second eyelet bolt mounting groove.
In one end of the first wire clip body, be provided with adjusting screw installing hole, high strength adjusting screw one end is arranged in adjusting screw installing hole, and the other end of high strength adjusting screw is made square, fixes with the second wire clip body.
Described clamp nut adopts two, and two clamp nuts are used in conjunction with high strength adjusting screw, tighten clamp nut after being adjusted to correct position, thereby plays the effect that locks wire and extending pull rod relative position.
Described high strength adjusting screw one end and the first wire clip body are threaded connection, by rotating threaded adjusting spacing.
The one-shot forming when cast of described high strength adjusting screw and the second wire clip body, permanent being fixed together; This connected mode is preferably the most reliable, but every mold can only be produced a kind of model, and mould drops into larger.
Described high strength adjusting screw sticks with glue admittedly again after being threaded connection with the second wire clip body together with.This kind of connected mode is economical and practical, can meet instructions for use, and matches according to actual needs the clamp of different model, therefore can save mould and pay wages and enhance productivity.
Described high strength adjusting screw adopts the low-carbon steel material after the antirust processing of hot galvanizing, and the adjusting screw intensity of more conventional aluminium matter is higher, not easy fracture.
Between a kind of the first wire clip body of jumper wire support spacer and the first wire clamp cover plate, by the first bearing pin, combine, the first bearing pin and the first wire clip body are tight fits, between the first bearing pin and the first wire clamp cover plate, be matched in clearance, guaranteed the rotation flexibility of the first wire clamp cover plate.The folding of the first wire clamp cover plate realizes by the first eyelet bolt group, between the first eyelet bolt in the first eyelet bolt group and the 3rd bearing pin, is matched in clearance, has guaranteed the rotation flexibility of the first eyelet bolt.Between the second wire clip body and the second wire clamp cover plate, by the second bearing pin, combine, the second bearing pin and the second wire clip body are tight fits, between the second bearing pin and the second wire clamp cover plate, are matched in clearance, have guaranteed the rotation flexibility of the second wire clamp cover plate.The folding of the second wire clamp cover plate realizes by the second eyelet bolt group, between the second eyelet bolt in the second eyelet bolt group and the 4th bearing pin, is matched in clearance, has guaranteed the rotation flexibility of the second eyelet bolt.
The present invention is one end fixing cord in use, and the other end is extending pull rod fixedly, is adjusted to tighten clamp nut after reasonable distance and be fixed, and now wire and extending pull rod are substantially 45o～90o and arrange.When wire drainage part causes swing under wind-force effect; no longer strain insulator conduction wire clamp is produced and understands bending stress; thereby and not again whiplash collision gold utensil cause damage to occur; strain insulator conduction wire clamp and wire have all been played to effective protective effect; guarantee the operation of circuit long time stability, avoided the generation of the power outage that causes because of drainage fracture and wire and gold utensil collision friction.
Advantage of the present invention: a kind of jumper wire support spacer is reasonable in design, can guarantee drainage thread and be connected reasonable clearance between gold utensil, avoid strain insulator conduction wire clamp fatigue damage, avoid wire whiplash collision gold utensil to cause damage, and because adopt high strength adjusting screw, possess the not advantage of easy fracture.After completing installation; when wire drainage part causes swing under wind-force effect; no longer strain insulator conduction wire clamp is produced and understands bending stress; thereby and not again whiplash collision gold utensil cause damage to occur; strain insulator conduction wire clamp and wire have all been played to effective protective effect; guaranteed the operation of circuit long time stability; avoid the generation of the power outage that causes because of drainage fracture and wire and gold utensil collision friction; for electric power system brings huge economic benefit, and then there is positive effect to building transmission line.
Accompanying drawing explanation
Below with reference to accompanying drawing, invention is described further.
Fig. 1 is the assembling schematic diagram of a kind of jumper wire support spacer of the present invention;
Fig. 2 is the first wire clip body of a kind of jumper wire support spacer of the present invention or the structural representation of the second wire clip body (structure of the second wire clip body is identical with the structure of the first wire clip body).
Fig. 3 is the right view (structure of the second wire clip body is identical with the structure of the first wire clip body) of the first wire clip body of a kind of jumper wire support spacer of Fig. 2 the present invention or the structure of the second wire clip body.
Fig. 4 is the vertical view (structure of the second wire clip body is identical with the structure of the first wire clip body) of the first wire clip body of a kind of jumper wire support spacer of Fig. 2 the present invention or the structure of the second wire clip body.
Fig. 5 is the first wire clamp cover plate of a kind of jumper wire support spacer of the present invention or the structural representation of the second wire clamp cover plate (structure of the second wire clamp cover plate is identical with the structure of the first wire clamp cover plate).
Fig. 6 is that the A-A of the first wire clamp cover plate of a kind of jumper wire support spacer of Fig. 5 the present invention or the structural representation of the second wire clamp cover plate is to cutaway view (structure of the second wire clamp cover plate is identical with the structure of the first wire clamp cover plate).
Fig. 7 is the vertical view (structure of the second wire clamp cover plate is identical with the structure of the first wire clamp cover plate) of the first wire clamp cover plate of a kind of jumper wire support spacer of Fig. 5 the present invention or the structure of the second wire clamp cover plate.
In figure: 1, the first wire clip body, the 2, first wire clamp cover plate, 3-1, the first eyelet bolt, 3-2, the first nut, 3-3, the 3rd bearing pin, the 4, first bearing pin, 5, high strength adjusting screw, 6, clamp nut, the 7, second wire clip body, 8, the second wire clamp cover plate, the 9, second bearing pin, 10-1, the second eyelet bolt, 10-2, the second nut, 10-3, the 4th bearing pin, the 11, first eyelet bolt mounting groove, 12, the second eyelet bolt mounting groove, 13, adjusting screw installing hole.
Embodiment
With reference to accompanying drawing 1～7, a kind of jumper wire support spacer comprises extending pull rod fixing clamper, wire fixing clamper, clamp nut 6 and high strength adjusting screw 5, extending pull rod fixing clamper is used for fixedly extending pull rod, extending pull rod fixing clamper has the first wire clip body 1, the first wire clamp cover plate 2, the first bearing pin 4 and the first eyelet bolt group, the first eyelet bolt group comprises the first eyelet bolt 3-1, the first nut 3-2, the 3rd bearing pin 3-3, the first packing ring and the first bullet pad, one end of the first eyelet bolt 3-1 is passed the first eyelet bolt mounting groove 11 and is fixed on the first wire clip body 1 by the first nut 3-2, the first packing ring and the first bullet pad are arranged between the first nut 3-2 and the first wire clip body 1, the other end of the first eyelet bolt 3-1 is provided with pinned hole, the other end of the first eyelet bolt 3-1 is flexibly connected with the first wire clamp cover plate 2 by the 3rd bearing pin 3-3, the first eyelet bolt 3-1 can freely swing around the 3rd bearing pin 3-3 being fixed on the first wire clamp cover plate 2 in the first eyelet bolt mounting groove 11, one end of the first wire clamp cover plate 2 is connected with the first wire clip body 1 by the first bearing pin 4, and the other end of the first wire clamp cover plate 2 is connected with the first wire clip body 1 by the first eyelet bolt group, till extending pull rod is sandwiched and tightens the first nut 3-2 to the first bullet pad after fixing clamper and flatten, complete the fixing of extending pull rod, the first described eyelet bolt group can freely swing around the 3rd bearing pin 3-3 in the first eyelet bolt mounting groove 11, wire fixing clamper is for fixing cord, wire fixing clamper is by the second wire clip body 7, the second wire clamp cover plate 8, the second bearing pin 9 and the second eyelet bolt group, the second eyelet bolt group comprises the second eyelet bolt 10-1, the second nut 10-2, the 4th bearing pin 10-3, the second packing ring and the second bullet pad, one end of the second eyelet bolt 10-1 is passed the second eyelet bolt mounting groove 12 and is fixed on the second wire clip body 7 by the second nut 10-2, the second packing ring and the second bullet pad are arranged between the second nut 10-2 and the second wire clip body 7, the other end of the second eyelet bolt 10-1 is provided with pinned hole, the other end of the second eyelet bolt 10-1 is flexibly connected with the second wire clamp cover plate 8 by the 4th bearing pin 10-3, the second eyelet bolt 10-1 can freely swing around the 4th bearing pin 10-3 being fixed on the second wire clamp cover plate 8 in the second eyelet bolt mounting groove 12, one end of the second wire clamp cover plate 8 is connected with the second wire clip body 7 by the second bearing pin 9, the other end of the second wire clamp cover plate 8 is connected with the second wire clip body 7 by the second eyelet bolt group, till wire is sandwiched and tightens the second nut 10-2 to the second bullet pad after wire fixing clamper and flatten, complete the fixing of wire, the second described eyelet bolt group can freely swing around the 4th bearing pin 10-3 in the second eyelet bolt mounting groove 12.
In one end of the first wire clip body 1, be provided with adjusting screw installing hole 13, high strength adjusting screw 5 one end are arranged in adjusting screw installing hole 13, and the other end of high strength adjusting screw 5 is made square, fixing with the second wire clip body 7.
Described clamp nut 6 adopts two, and two clamp nuts 6 are used in conjunction with high strength adjusting screw 5, tighten clamp nut 6 after being adjusted to correct position, thereby plays the effect of locking wire and extending pull rod relative position.
Described high strength adjusting screw 5 one end and the first wire clip body 1 are threaded connection, by rotating threaded adjusting spacing.
The one-shot forming when cast of described high strength adjusting screw 5 and the second wire clip body 7, permanent being fixed together.This connected mode is preferably the most reliable, but every mold can only be produced a kind of model, and mould drops into larger.
Described high strength adjusting screw 5 sticks with glue admittedly again after being threaded connection with the second wire clip body 7 together with.This kind of connected mode is economical and practical, can meet instructions for use, and matches according to actual needs the clamp of different model, therefore can save mould and pay wages and enhance productivity.
The low-carbon steel material that described high strength adjusting screw 5 adopts after the antirust processing of hot galvanizing, the adjusting screw intensity of more conventional aluminium matter is higher, not easy fracture.
Between a kind of the first wire clip body 1 of jumper wire support spacer and the first wire clamp cover plate 2, by the first bearing pin 4, combine, the first bearing pin 4 and the first wire clip body 1 are tight fits, between the first bearing pin 4 and the first wire clamp cover plate 2, be matched in clearance, guaranteed the rotation flexibility of the first wire clamp cover plate 2.The folding of the first wire clamp cover plate 2 realizes by the first eyelet bolt group, between the first eyelet bolt 3-1 in the first eyelet bolt group and the 3rd bearing pin 3-3, is matched in clearance, has guaranteed the rotation flexibility of the first eyelet bolt 3-1.Between the second wire clip body 7 and the second wire clamp cover plate 8, by the second bearing pin 9, combine, the second bearing pin 9 and the second wire clip body 7 are tight fits, between the second bearing pin 9 and the second wire clamp cover plate 8, be matched in clearance, guaranteed the rotation flexibility of the second wire clamp cover plate 8.The folding of the second wire clamp cover plate 8 realizes by the second eyelet bolt group, between the second eyelet bolt 10-1 in the second eyelet bolt group and the 4th bearing pin 10-3, is matched in clearance, has guaranteed the rotation flexibility of the second eyelet bolt 10-1.
The present invention is one end fixing cord in use, and the other end is extending pull rod fixedly, is adjusted to tighten clamp nut 6 after reasonable distance and be fixed, and now wire and extending pull rod are substantially 45o～90o and arrange.When wire drainage part causes swing under wind-force effect; no longer strain insulator conduction wire clamp is produced to bending stress back and forth; thereby and not again whiplash collision gold utensil cause damage to occur; strain insulator conduction wire clamp and wire have all been played to effective protective effect; guarantee the operation of circuit long time stability, avoided the generation of the power outage that causes because of drainage fracture and wire and gold utensil collision friction.
Claims (6)
1. a jumper wire support spacer, it is characterized in that: comprise extending pull rod fixing clamper, wire fixing clamper, clamp nut and high strength adjusting screw, extending pull rod fixing clamper has the first wire clip body, the first wire clamp cover plate, the first bearing pin and the first eyelet bolt group, the first eyelet bolt group comprises the first eyelet bolt, the first nut, the 3rd bearing pin, the first packing ring and the first bullet pad, one end of the first eyelet bolt is passed the first eyelet bolt mounting groove and is fixed on the first wire clip body by the first nut, the first packing ring and the first bullet pad are arranged between the first nut and the first wire clip body, the other end of the first eyelet bolt is provided with pinned hole, the other end of the first eyelet bolt is flexibly connected with the first wire clamp cover plate by the 3rd bearing pin, the first eyelet bolt can freely swing around the 3rd bearing pin being fixed on the first wire clamp cover plate in the first eyelet bolt mounting groove, one end of the first wire clamp cover plate is connected with the first wire clip body by the first bearing pin, and the other end of the first wire clamp cover plate is connected with the first wire clip body by the first eyelet bolt group, till extending pull rod is sandwiched and tightens the first nut to the first bullet pad after fixing clamper and flatten, complete the fixing of extending pull rod, the first described eyelet bolt group can freely swing around the first bearing pin in the first eyelet bolt mounting groove, wire fixing clamper is for fixing cord, wire fixing clamper is by the second wire clip body, the second wire clamp cover plate, the second bearing pin and the second eyelet bolt group, the second eyelet bolt group comprises the second eyelet bolt, the second nut, the 4th bearing pin, the second packing ring and the second bullet pad, one end of the second eyelet bolt is passed the second eyelet bolt mounting groove and is fixed on the second wire clip body by the second nut, the second packing ring and the second bullet pad are arranged between the second nut and the second wire clip body, the other end of the second eyelet bolt is provided with pinned hole, the other end of the second eyelet bolt is flexibly connected with the second wire clamp cover plate by the 4th bearing pin, the second eyelet bolt can freely swing around the 4th bearing pin being fixed on the second wire clamp cover plate in the second eyelet bolt mounting groove, one end of the second wire clamp cover plate is connected with the second wire clip body by the second bearing pin, the other end of the second wire clamp cover plate is connected with the second wire clip body by the second eyelet bolt group, till wire is sandwiched and tightens the second nut to the second bullet pad after wire fixing clamper and flatten, complete the fixing of wire, the second described eyelet bolt group can freely swing around the second bearing pin in the second eyelet bolt mounting groove,
In one end of the first wire clip body, be provided with adjusting screw installing hole, high strength adjusting screw one end is arranged in adjusting screw installing hole, and the other end of high strength adjusting screw is made square, fixes with the second wire clip body.
2. a kind of jumper wire support spacer according to claim 1, is characterized in that: described clamp nut adopts two, and two clamp nuts coordinate with high strength adjusting screw.
3. a kind of jumper wire support spacer according to claim 1, is characterized in that: described high strength adjusting screw one end and the first wire clip body are threaded connection, by rotating threaded adjusting spacing.
4. a kind of jumper wire support spacer according to claim 1, is characterized in that: described high strength adjusting screw and the second wire clip body are one-shot forming, permanent being fixed together.
5. a kind of jumper wire support spacer according to claim 1, is characterized in that: described high strength adjusting screw sticks with glue admittedly again after being threaded connection with the second wire clip body together with.
6. a kind of jumper wire support spacer according to claim 1, is characterized in that: described high strength adjusting screw adopts the low-carbon steel material after the antirust processing of hot galvanizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110452224.2A CN102447239B (en) | 2011-12-30 | 2011-12-30 | Jumper wire support spacer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110452224.2A CN102447239B (en) | 2011-12-30 | 2011-12-30 | Jumper wire support spacer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102447239A CN102447239A (en) | 2012-05-09 |
| CN102447239B true CN102447239B (en) | 2014-03-26 |
Family
ID=46009467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110452224.2A Expired - Fee Related CN102447239B (en) | 2011-12-30 | 2011-12-30 | Jumper wire support spacer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102447239B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300475A (en) * | 2014-10-23 | 2015-01-21 | 江苏省电力公司淮安供电公司 | Spacer rod used for power transmission line |
| CN109004600B (en) * | 2018-07-27 | 2021-03-16 | 武汉虹信科技发展有限责任公司 | Method for realizing through-wall type connector capable of adapting to mounting surface inclination angle |
| CN110165612B (en) * | 2019-06-18 | 2020-08-18 | 良信电器股份有限公司 | Surrounding type bunching device for laying multiple cables |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3867566A (en) * | 1973-03-12 | 1975-02-18 | Chance Co Ab | Midspan electrical conductor spacer |
| JP3276824B2 (en) * | 1995-10-17 | 2002-04-22 | 古河電気工業株式会社 | Spacer |
| CN2733697Y (en) * | 2004-10-13 | 2005-10-12 | 花为淦 | Spacer damper for jumper conductor of power transmission line |
| CN101931193A (en) * | 2010-08-24 | 2010-12-29 | 中国电力科学研究院 | Adjustable sub-lead spacer |
| CN102237662A (en) * | 2010-04-26 | 2011-11-09 | 江都市曙光电力器材有限公司 | Support spacing rod |
| CN202424073U (en) * | 2011-12-30 | 2012-09-05 | 江东金具设备有限公司 | Jumper supporting spacing rod |
-
2011
- 2011-12-30 CN CN201110452224.2A patent/CN102447239B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3867566A (en) * | 1973-03-12 | 1975-02-18 | Chance Co Ab | Midspan electrical conductor spacer |
| JP3276824B2 (en) * | 1995-10-17 | 2002-04-22 | 古河電気工業株式会社 | Spacer |
| CN2733697Y (en) * | 2004-10-13 | 2005-10-12 | 花为淦 | Spacer damper for jumper conductor of power transmission line |
| CN102237662A (en) * | 2010-04-26 | 2011-11-09 | 江都市曙光电力器材有限公司 | Support spacing rod |
| CN101931193A (en) * | 2010-08-24 | 2010-12-29 | 中国电力科学研究院 | Adjustable sub-lead spacer |
| CN202424073U (en) * | 2011-12-30 | 2012-09-05 | 江东金具设备有限公司 | Jumper supporting spacing rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102447239A (en) | 2012-05-09 |
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