CN111668778A - Power connection device for railway line power transmission - Google Patents
Power connection device for railway line power transmission Download PDFInfo
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- CN111668778A CN111668778A CN202010496493.8A CN202010496493A CN111668778A CN 111668778 A CN111668778 A CN 111668778A CN 202010496493 A CN202010496493 A CN 202010496493A CN 111668778 A CN111668778 A CN 111668778A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 23
- 239000003433 contraceptive agent Substances 0.000 claims description 2
- 230000002254 contraceptive effect Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 238000009423 ventilation Methods 0.000 description 4
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
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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
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/088—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention relates to the technical field of electric connection devices, in particular to an electric connection device for railway line power transmission, which comprises a junction box, wherein two rollers I are arranged in an inner cavity of the junction box, the junction box is in a square tube shape, the end part of a tube body is in a closed shape, two rollers II which are symmetrically distributed are arranged at the position of an opening end of the junction box, an L-shaped plate is fixedly connected in the inner cavity of the junction box, an electric wire penetrates through the junction box, a cylindrical hole is formed in the L-shaped plate, the electric wire penetrates through the cylindrical hole of the L-shaped plate, and a plurality of uniformly distributed spring pieces I are annularly arranged at the position of the inner wall of the cylindrical hole of the L-shaped plate. Namely, the electric wire can be cut off, and the function is stable and strong.
Description
Technical Field
The invention relates to the technical field of power connection devices, in particular to a power connection device for railway line power transmission.
Background
The railway line power transmission work in the prior art needs to lay a large number of electric wires above the railway line, and the maintenance and repair of the electric wires are always a technology needing to be improved.
If the power connection device can be invented, junction boxes are installed on the electric wire at certain intervals in advance when railway electric wires are laid, and the junction boxes are operated in later maintenance, the electric wire can be quickly maintained, so that the problem can be solved, and the power connection device for railway line power transmission is provided.
Disclosure of Invention
The invention aims to provide an electric connection device for railway line power transmission, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a power connection device for railway line power transmission comprises a junction box, wherein two rollers I are arranged in an inner cavity of the junction box, the junction box is in a square tube shape, the end part of a barrel body is in a closed shape, two rollers II are symmetrically distributed at the position of an opening end of the junction box, an L-shaped plate is fixedly connected in the inner cavity of the junction box, an electric wire penetrates through the junction box, a cylindrical hole is formed in the L-shaped plate, the electric wire penetrates through the cylindrical hole of the L-shaped plate, a plurality of spring pieces I which are uniformly distributed are annularly arranged on the inner wall of the cylindrical hole of the L-shaped plate, two clamping devices which are symmetrically distributed are arranged around the spring pieces I, a T-shaped plate groove is formed in the inner wall of the cylindrical hole of the L-shaped plate, one end of each clamping device extends into the T-shaped plate groove of the L-shaped plate, one end of, one end of the telescopic column is fixedly connected with a clamping block, the other end of the telescopic column is fixedly connected with a spring, the telescopic column is sleeved with the spring, one side of the corrugated pipe is connected with an air valve, the air valve comprises a movable ball, a sealing ring, a second spring piece and a ventilating plate, one end of the movable ball is contacted with the sealing ring, the other end of the movable ball is fixedly connected with the second spring piece, one end of the second spring piece is fixedly connected with the ventilating plate, the L-shaped plate is provided with a cylindrical cavity, a straight pipe cavity, the ventilating plate and a branch pipe cavity, one side of the cylindrical cavity is annularly provided with a plurality of uniformly distributed straight pipe cavities, the other side of the cylindrical cavity is connected with the ventilating plate, one end of the ventilating plate extends into the junction box shell, one side of the straight pipe cavity is communicated with a plurality of branch pipe cavities, one end of the branch pipe, fixedly connected with external pipe on the terminal box outer wall, bellows one end extends to in the chamber inner chamber that gathers and distributes, ventilative board one end and the chamber intercommunication that gathers and distributes.
Preferably, the first spring pieces are U-shaped plates, the end parts of the plate bodies are outwards bent, one parts of the first spring pieces protrude into the inner cavity of the cylindrical hole of the L-shaped plate, and the first spring pieces are uniformly arranged on the inner cavity of the cylindrical hole of the L-shaped plate in an annular mode.
Preferably, the branch pipe cavity is in a shape of a cylindrical cavity, one end of the branch pipe cavity is communicated with the block cavity, the fixture block is arranged in the block cavity of the branch pipe cavity in a matching mode, the fixture block is in a shape of a square block, a step surface is arranged on the block body, and the step surface of the fixture block is in contact with the spring piece.
Preferably, the spring is movably sleeved on the telescopic column, one end of the spring is in contact with the clamping block, the spring is arranged in the block-shaped cavity of the branch pipe cavity, and the telescopic column, the corrugated pipe and the air valve are sleeved in the cylindrical cavity of the branch pipe cavity.
Preferably, the telescopic column and the corrugated pipe are movably sleeved in a cylindrical groove of the telescopic column, the telescopic column is cylindrical, one end of the corrugated pipe is fixedly connected with the bottom surface of the telescopic column, the other end of the corrugated pipe is fixedly connected with the sealing ring, and one end of the branch pipe cavity is communicated with the straight pipe cavity.
Preferably, the sealing ring and the ventilation plate are fixed on the inner wall of the cylindrical cavity of the branch cavity, the sealing ring is shaped like a cylinder and the barrel is provided with a plurality of L-shaped cavities which are uniformly distributed, a spherical groove is formed in the middle of the bottom surface of one side of the sealing ring, the movable ball is matched with the spherical groove of the sealing ring, and the ventilation plate is shaped like a circular plate and is provided with a plurality of uniformly distributed through holes.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention realizes that the junction box can conveniently and rapidly move on the electric wire, so that the damaged point on the electric wire is positioned in the middle position of the inner cavity of the junction box, after the junction box is static for a certain time, the plurality of spring pieces I clamp the electric wire, namely the L-shaped plate and the electric wire are synchronously fixed, and the electric wire between the two rollers I is repaired, so that the electric wire can be cut off, and the function is stable and strong;
2. the device can realize the control transmission of a clamping device through the ventilation through the communicating design of the cylindrical cavity, the straight cavity, the ventilating plate and the branch cavity, realizes the flow bidirectional control of air flow through the design of the air valve, can quickly break the clamping state of a plurality of spring pieces I, and the spring pieces I clamp the electric wire again, the process needs certain time, and sufficient time is reserved for the manual pushing of the junction box on the electric wire.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure at A in FIG. 1;
fig. 3 is a schematic diagram of an L-shaped plate structure.
In the figure: the device comprises a junction box 1, a roller I2, a roller II 3, a 4L-shaped plate, an electric wire 5, a spring leaf I6, a clamping device 7, a cylindrical cavity 8, a straight tube cavity 9, a telescopic column 10, a clamping block 11, a corrugated tube 12, a spring 13, an air valve 14, a movable ball 15, a sealing ring 16, a spring leaf II 17, a ventilating plate 18, a branch tube cavity 19, a collecting and distributing cavity 20 and an external connecting tube 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art without creative efforts based on the technical solutions of the present invention belong to the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a technical solution: the utility model provides a railway line is electric installation for transmission of electricity, including terminal box 1, be provided with two gyro wheels one 2 in the terminal box 1 inner chamber, the shape of terminal box 1 is square tube-shape and barrel tip for closing up the form, the open end position of terminal box 1 is provided with two symmetric distribution's gyro wheel two 3, fixedly connected with L template 4 in the inner chamber of terminal box 1, it has electric wire 5 to run through on the terminal box 1, the cylinder hole has been seted up on the L template 4, electric wire 5 runs through the cylinder hole of L template 4, the cylinder hole inner wall position ring of L template 4 is equipped with a plurality of evenly distributed spring leaf one 6, be provided with two symmetric distribution's screens device 7 around the spring leaf one 6, set up T template groove on the cylinder hole inner wall of L template 4, screens device 7 one end extends to the T template groove of L template 4, and screens device 7 one end and spring leaf one 6 contact, screens device 7 includes flexible post, The structure comprises a clamping block 11, a corrugated pipe 12, a spring 13 and an air valve 14, wherein one end of a telescopic column 10 is fixedly connected with the clamping block 11, the other end of the telescopic column 10 is fixedly connected with the spring 13, the spring 13 is sleeved on the telescopic column 10, one side of the corrugated pipe 12 is connected with the air valve 14, the air valve 14 comprises a movable ball 15, a sealing ring 16, a second spring piece 17 and a ventilating plate 18, one end of the movable ball 15 is contacted with the sealing ring 16, the other end of the movable ball 15 is fixedly connected with the second spring piece 17, one end of the second spring piece 17 is fixedly connected with the ventilating plate 18, a cylindrical cavity 8, a straight pipe cavity 9, the ventilating plate 18 and a branch pipe cavity 19 are arranged on an L-shaped plate 4, a plurality of straight pipe cavities 9 which are uniformly distributed are annularly arranged on one side of the cylindrical cavity 8, the other side of the cylindrical cavity 8 is connected with the ventilating plate 18, one end of the, the clamping device 7 is arranged in the branch pipe cavity 19, a square cylindrical collecting and distributing cavity 20 is formed in a shell of the junction box 1, an external connecting pipe 21 is fixedly connected to the outer wall of the junction box 1, one end of the corrugated pipe 12 extends into the inner cavity of the collecting and distributing cavity 20, one end of the ventilation plate 18 is communicated with the collecting and distributing cavity 20, referring to fig. 1, the wire 5 is S-shaped in the inner cavity of the junction box 1, the junction box 1 is sleeved on the wire 5, the junction box 1 can move on the wire 5, namely the wire 5 moves and is conveyed in the junction box 1, a plurality of spring pieces 6 are controlled not to apply pressure on the wire 5, namely the wire 5 can shuttle in the L-shaped plate 4, when the spring pieces 6 are not controlled, the spring pieces 6 sink into the wire 5, the clamping of the wire 5 is achieved, and the exhaust device in the prior art is connected.
The first spring piece 6 is in a U-shaped plate shape, the end part of the plate body is bent outwards, the part of the first spring piece 6 protrudes into the inner cavity of the cylindrical hole of the L-shaped plate 4, and the first spring pieces 6 are uniformly arranged on the inner cavity of the cylindrical hole of the L-shaped plate 4 in an annular mode.
The branch pipe cavity 19 is in a cylindrical cavity, one end of the branch pipe cavity is communicated with the block cavity, the fixture block 11 is arranged in the block cavity of the branch pipe cavity 19 in a matching mode, the fixture block 11 is in a square block shape, a step surface is arranged on the block body, and the step surface of the fixture block 11 is in contact with the first spring piece 6.
The spring 13 is movably sleeved on the telescopic column 10, one end of the spring 13 is contacted with the clamping block 11, the spring 13 is arranged in the block-shaped cavity of the branch pipe cavity 19, and the telescopic column 10, the corrugated pipe 12 and the air valve 14 are sleeved in the cylindrical cavity of the branch pipe cavity 19.
The telescopic column 10 and the corrugated pipe 12 are movably sleeved in a cylindrical groove of the telescopic column 10, the telescopic column 10 is cylindrical, one end of the corrugated pipe 12 is fixedly connected with the bottom surface of the telescopic column 10, the other end of the corrugated pipe 12 is fixedly connected with the sealing ring 16, and one end of the branch pipe cavity 19 is communicated with the straight pipe cavity 9.
The working principle is as follows: the air in the collecting and distributing cavity 20 is exhausted by sucking air outwards at the position of the outer connecting pipe 21, the two vent plates 18 are communicated with the collecting and distributing cavity 20, the air in the cylindrical cavity 8 is sucked out through the vent plates 18, the air in the straight pipe cavities 9 is sucked out finally, the air in the corrugated pipe 12 is sucked out, the corrugated pipe 12 is forced to deform and contract by air pressure, the telescopic column 10 moves to drive the clamping block 11, the clamping block 11 is not padded at the end position of the spring piece I6, although the spring pieces I6 press the outer wall of the electric wire 5 through elastic deformation, the supporting force of the clamping block 11 is lost and is not enough to clamp the electric wire 5, therefore, the electric wire 5 can move in the cylindrical hole of the L-shaped plate 4, namely, after the worker stops the air sucking work, the worker can push the connecting box 1 manually, the connecting box 1 moves to a designated position on the electric wire 5, the damaged point on the electric wire connecting box 5 is ensured, can set up the side cap among the prior art promptly on terminal box 1 shell body, make things convenient for the workman to operate the device in the inner chamber of terminal box 1, static certain time, spring 13 bounce-back promotes fixture block 11, make fixture block 11 cushion the tip at spring leaf 6 again, a plurality of spring leaf 6 are absorbed in the electric wire 5 upper portion stably like this, realize the firm screens to electric wire 5, need one end time because the air current flows to the inner chamber of bellows 12 through pneumatic valve 14 in the straight lumen 9, the air current can only pass through the L type lumen on the sealing ring 16, the lumen internal diameter is little, need certain time, this section time is the travel time of terminal box 1 on electric wire 5.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a railway line is electric installation for transmission of electricity, includes terminal box (1), its characterized in that: the connecting box is characterized in that two rollers I (2) are arranged in an inner cavity of the connecting box (1), the connecting box (1) is square and cylindrical, the end part of a barrel is in a closed shape, two rollers II (3) which are symmetrically distributed are arranged at the position of an opening end of the connecting box (1), an L-shaped plate (4) is fixedly connected in the inner cavity of the connecting box (1), an electric wire (5) penetrates through the connecting box (1), a cylindrical hole is formed in the L-shaped plate (4), the electric wire (5) penetrates through the cylindrical hole of the L-shaped plate (4), a plurality of uniformly distributed spring pieces I (6) are annularly arranged at the position of the inner wall of the cylindrical hole of the L-shaped plate (4), two clamping devices (7) which are symmetrically distributed are arranged around the spring pieces I (6), a T-shaped plate groove is formed in the inner wall of the cylindrical hole of the L-shaped plate (4), one end of each clamping device (7) extends into the T-shaped plate groove of the, the clamping device (7) comprises a telescopic column (10), a clamping block (11), a corrugated pipe (12), a spring (13) and an air valve (14), wherein the clamping block (11) is fixedly connected to one end of the telescopic column (10), the spring (13) is fixedly connected to the other end of the telescopic column (10), the spring (13) is sleeved on the telescopic column (10), the air valve (14) is connected to one side of the corrugated pipe (12), the air valve (14) comprises a movable ball (15), a sealing ring (16), a second spring piece (17) and a ventilating plate (18), the sealing ring (16) is contacted with one end of the movable ball (15), the second spring piece (17) is fixedly connected to the other end of the movable ball (15), the ventilating plate (18) is fixedly connected to one end of the second spring piece (17), and a cylindrical cavity (8), a straight pipe cavity (9), the ventilating plate (18) and a branch pipe cavity (, one side ring of tube-shape chamber (8) is equipped with a plurality of evenly distributed's straight tube chamber (9), and tube-shape chamber (8) opposite side is connected with ventilative board (18), and ventilative board (18) one end extends to in terminal box (1) casing, and one side intercommunication of straight tube chamber (9) has a plurality of branch pipe chambeies (19), and T type board groove intercommunication on branch pipe chamber (19) one end and the L template (4), screens device (7) set up in branch pipe chamber (19), set up the collection scattered chamber (20) of square tube-shape on terminal box (1) casing, fixedly connected with outer takeover (21) on terminal box (1) outer wall, bellows (12) one end extends to in collection scattered chamber (20) inner chamber, ventilative board (18) one end and collection scattered chamber (20) intercommunication.
2. The power connection device for railway line power transmission according to claim 1, wherein: the spring piece I (6) is in a U-shaped plate shape, the end part of the plate body is bent outwards, the part of the spring piece I (6) protrudes into the inner cavity of the cylindrical hole of the L-shaped plate (4), and the spring pieces I (6) are uniformly arranged on the inner cavity of the cylindrical hole of the L-shaped plate (4) in an annular mode.
3. The power connection device for railway line power transmission according to claim 1, wherein: the branch pipe cavity (19) is in a cylindrical cavity shape, one end of the branch pipe cavity is communicated with the block cavity, the fixture block (11) is arranged in the block cavity of the branch pipe cavity (19) in a matching mode, the fixture block (11) is in a square block shape, a step surface is arranged on the block body, and the step surface of the fixture block (11) is in contact with the first spring piece (6).
4. The power connection device for railway line power transmission according to claim 1, wherein: the spring (13) is movably sleeved on the telescopic column (10), one end of the spring (13) is in contact with the clamping block (11), the spring (13) is arranged in the block-shaped cavity of the branch cavity (19), and the telescopic column (10), the corrugated pipe (12) and the air valve (14) are sleeved in the cylindrical cavity of the branch cavity (19).
5. The power connection device for railway line power transmission according to claim 1, wherein: the telescopic column (10) and the corrugated pipe (12) are movably sleeved in a cylindrical groove of the telescopic column (10), the telescopic column (10) is cylindrical, one end of the corrugated pipe (12) is fixedly connected with the bottom surface of the telescopic column (10), the other end of the corrugated pipe (12) is fixedly connected with the sealing ring (16), and one end of the branch pipe cavity (19) is communicated with the straight pipe cavity (9).
6. The power connection device for railway line power transmission according to claim 1, wherein: sealing ring (16) and ventilative board (18) are fixed on the cylinder intracavity wall of a branch pipe chamber (19), and sealing ring (16) shape is equipped with a contraceptive ring for drum and barrel and is equipped with a plurality of evenly distributed's L type lumen, and the spherical groove has been seted up at one side bottom surface middle part of sealing ring (16), and the spherical groove of activity ball (15) and sealing ring (16) agrees with, and ventilative board (18) shape is offered a plurality of evenly distributed's through-hole for on the plectane and the plate body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010496493.8A CN111668778B (en) | 2020-06-03 | 2020-06-03 | Power connection device for railway line power transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010496493.8A CN111668778B (en) | 2020-06-03 | 2020-06-03 | Power connection device for railway line power transmission |
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| Publication Number | Publication Date |
|---|---|
| CN111668778A true CN111668778A (en) | 2020-09-15 |
| CN111668778B CN111668778B (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010496493.8A Active CN111668778B (en) | 2020-06-03 | 2020-06-03 | Power connection device for railway line power transmission |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563987A (en) * | 2020-12-01 | 2021-03-26 | 合肥通博电源科技有限公司 | Generator internal cable fixing device |
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| CN107658809A (en) * | 2017-10-10 | 2018-02-02 | 田玉 | A kind of cable-joint protector box suitable for communication engineering |
| US20180248301A1 (en) * | 2017-02-24 | 2018-08-30 | Pentair Flow Services Ag | Fire-Rated Three-Way Splice Assembly |
| US20180346000A1 (en) * | 2017-05-31 | 2018-12-06 | Alstom Transport Technologies | Railway vehicle having an optimized electricity distribution network |
| CN208411721U (en) * | 2018-07-12 | 2019-01-22 | 中铁磁浮科技（成都）有限公司 | A kind of interface box suitable for the wiring of medium-and low-speed maglev train |
| CN110798036A (en) * | 2019-12-16 | 2020-02-14 | 新昌县籍服机械有限公司 | Auxiliary device for assembling high-precision servo motor |
-
2020
- 2020-06-03 CN CN202010496493.8A patent/CN111668778B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180248301A1 (en) * | 2017-02-24 | 2018-08-30 | Pentair Flow Services Ag | Fire-Rated Three-Way Splice Assembly |
| US20180346000A1 (en) * | 2017-05-31 | 2018-12-06 | Alstom Transport Technologies | Railway vehicle having an optimized electricity distribution network |
| CN107658809A (en) * | 2017-10-10 | 2018-02-02 | 田玉 | A kind of cable-joint protector box suitable for communication engineering |
| CN208411721U (en) * | 2018-07-12 | 2019-01-22 | 中铁磁浮科技（成都）有限公司 | A kind of interface box suitable for the wiring of medium-and low-speed maglev train |
| CN110798036A (en) * | 2019-12-16 | 2020-02-14 | 新昌县籍服机械有限公司 | Auxiliary device for assembling high-precision servo motor |
Cited By (1)
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| CN112563987A (en) * | 2020-12-01 | 2021-03-26 | 合肥通博电源科技有限公司 | Generator internal cable fixing device |
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| CN111668778B (en) | 2021-11-05 |
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Effective date of registration: 20240320 Address after: No. 33 Longsheng North Road, Leliu Neighborhood Committee, Leliu Street, Shunde District, Foshan City, Guangdong Province, 528322 Patentee after: GUANGDONG HOUWEI ELECTRICAL EQUIPMENT CO.,LTD. Country or region after: Zhong Guo Address before: Guangzhou college, South China University of technology, No.1 Xuefu Road, Huadu District, Guangzhou, Guangdong 510000 Patentee before: Tang Shenghua Country or region before: Zhong Guo |