CN106931244A - Spigot-and-socket steel pipe and its processing method - Google Patents
Spigot-and-socket steel pipe and its processing method Download PDFInfo
- Publication number
- CN106931244A CN106931244A CN201511006231.4A CN201511006231A CN106931244A CN 106931244 A CN106931244 A CN 106931244A CN 201511006231 A CN201511006231 A CN 201511006231A CN 106931244 A CN106931244 A CN 106931244A
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- socket
- spigot
- pipe
- short tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
- F16L9/04—Reinforced pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/02—Making hollow objects characterised by the structure of the objects
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a kind of spigot-and-socket steel pipe and its processing method, including steel pipe (1), one end port of the steel pipe is faucet part (2), the other end port of the steel pipe is socket (3), the faucet part is machined with the first arc transition section (4) successively from the inside to the outside, short tube load section (5), second circular arc transition (6), short tube seal section (7) and the ring baffle (8) positioned at faucet part port, locating slot (9) is machined with the short tube seal section, the port of the socket is provided with chamfering or closes up (10).The beneficial effects of the invention are as follows processing is simple, practical.
Description
Technical field
The present invention relates to pipeline processing technical field, particularly a kind of spigot-and-socket steel pipe and its processing
Method.
Background technology
Bayonet joint is the usual connection for using for larger-diameter pipe of cement and cast iron pipe
Method, its simple structure, installation is convenient, effect is high.But pipe of cement and cast iron pipe are present
Compressive resistance is low, and wall thickness is heavy, and the shortcoming of plasticity and poor toughness causes it high in discharge pressure,
Should not be used when pipeline is built on stilts.And steel pipe can overcome the above-mentioned of pipe of cement and cast iron pipe
Shortcoming, but then there are some difficulties for being connected in site operation for larger diameter steel pipe, because
It is that common welding or flange connection method are not suitable for because of operating difficulties or high cost.Current one
As be all but especially underground pipeline construction in constructing at the scene, welding using being welded to connect
Very inconvenient, efficiency is low and quality is difficult to ensure that.According to the flexible connection of more conveniently spigot-and-socket,
Then because steel pipe walls are relatively thin, it is impossible to tube end maching is connect into socket joint with method for turning as cast iron pipe
Mouthful and be difficult to.Therefore, number of patent application for CN00114232.1 " expansion shaped insertion-type holds
The formula of inserting soft just dual-purpose joint steel pipe and its manufacture method " patent application, it is proposed that using (cold to add
Work) technique is dilated, steel pipe two ends is dilated into holding with special size by mold shape respectively
Head and plug, but the structure taken the lead of the connection is only made up of expanding straight length and arc transition section,
Socket joint is less surely leaned on, therefore needs to be welded and fixed connection pipe end sometimes；Simultaneously steel pipe take the lead and
Plug is required for expansion shaped insertion-type, and processing cost is higher；In addition, can be produced after expansion shaped insertion-type higher
Residual stress, its mould is also complex, costly.
The content of the invention
The invention aims to solve the above problems, devise a kind of spigot-and-socket steel pipe and its
Processing method.
Realize above-mentioned purpose the technical scheme is that, a kind of spigot-and-socket steel pipe, including steel pipe
(1), one end port of the steel pipe is faucet part (2), the other end port of the steel pipe
Be socket (3), the faucet part be machined with successively from the inside to the outside the first arc transition section (4),
Short tube load section (5), the second circular arc transition (6), short tube seal section (7) and positioned at holding
The ring baffle (8) of oral area port, is machined with locating slot (9) on the short tube seal section,
The port of the socket is provided with chamfering or closes up (10).
Locating slot (9) longitudinal section is the toroidal cavity structure for bending font.
A kind of processing method of the spigot-and-socket steel pipe described in claim 1, the method is included such as
Lower step：
, be placed on steel pipe to be processed in the carriage mechanism of rolling pipe-expanding machine first, steel by step one
The socket of pipe is fixed on the position-limit mechanism of rolling enlarging machine tail end, and faucet part expands against rolling
The flaring structure of mouth machine, then regulation rolls pipe-expanding machine moves the flaring mechanism of rolling pipe-expanding machine
To operating position, so turn on the power, first rolled out by flaring mechanism the first circular arc transition and
Short tube load section, then controls flaring mechanism to retreat, and readjusts flaring mechanism in the first circular arc
The second circular arc transition of place is rolled in the contact of transition and short tube load section again and short tube is sealed
Section；
Step 2, the steel pipe after being processed in step one is placed in the carriage mechanism of flange film laminator,
And the faucet part mouth of pipe of steel pipe is placed on the lower mould of flange film laminator, rise flange film laminator
Anti-shake support roller holds steel pipe, then starts motor, by the upper and lower mould of flange film laminator
Coordinate, short tube seal section and mouth of pipe end in the steel pipe faucet part mouth of pipe process positioning respectively
Groove and ring baffle；
Step 3, by step 2 process after steel pipe socket mouth of pipe end carry out chamfered edge or
Shell nosing treatment, obtains spigot-and-socket coupling finished product.
The flaring mechanism be by be arranged in frame (11) track (12), install it is in-orbit
Electronic supporting plate (13) on road, the column (14) being fixed on electronic splint upper surface, peace
In frame and drive horizontal drive apparatus that electronic supporting plate moves horizontally along track, install
The lowering or hoisting gear that expanding device and driving expanding device on column are moved up and down along column
Collectively form, the expanding device be by installed in the rolling pedestal (15) on column,
Installed in rolling pedestal in and rotary shaft stretch out rolling pedestal enlarging motor (16) and be arranged on
What the bistrique (17) in rotary shaft was collectively constituted, the bowl-shape of through hole is provided with centered on the bistrique
Structure.
The position-limit mechanism is to be by rack-mounted rotary shaft (18) and be fixedly mounted on
What limited cover (19) two parts in rotary shaft were constituted.
The carriage mechanism is supporting roller base (20) by being fixed in frame and installed in supporting roller base
On a pair anti-skidding tugboat (21) two parts constitute.
The horizontal drive apparatus are by horizontal motor (22) and by reductor and horizontal motor
Drive connection and drive horizontal roller screw (23) two parts structure of electronic pallets level movement
Into.
The lowering or hoisting gear is by the lifting motor (24) installed in column top and positioned at vertical
The vertical rolling for being connected and driving rolling pedestal to lift in post and by reductor and lifting motor
Axial filament thick stick (25) is collectively formed.
Bistrique is provided with the rotary shaft of the enlarging motor (16), the bistrique is by wherein
The through hole of the heart is socketed in the rotary shaft of enlarging motor, on the inner surface of the through hole and rotary shaft
Outer surface on be designed with keyway and synchronized links formed by square key.
The spigot-and-socket steel pipe and its processing method made using technical scheme, greatly
The quality and Practical Performance of the joint of spigot-and-socket steel pipe are improve, production efficiency is improve, is reduced
Production cost.
Brief description of the drawings
Fig. 1 is the structural representation of spigot-and-socket steel pipe of the present invention；
Fig. 2 is the structural representation of rolling pipe-expanding machine of the present invention；
In figure, 1, steel pipe；2nd, faucet part；3rd, socket；4th, the first arc transition section；5th, it is short
Pipe load section；6th, the second arc transition section；7th, short tube seal section；8th, ring baffle；9、
Locating slot；10th, chamfering or closing in；11st, frame；12nd, track；13rd, electronic supporting plate；14、
Column；15th, pedestal is rolled；16th, enlarging motor；17th, bistrique；18th, rotary shaft；19、
Limited cover；20th, supporting roller base；21st, anti-skidding tugboat；22nd, horizontal motor；23rd, horizontal roller bearing
Leading screw；24th, lifting motor；25th, vertical roller screw.
Specific embodiment
The present invention is specifically described below in conjunction with the accompanying drawings, as shown in Figure 1-2, a kind of socket joint
Formula steel pipe, including steel pipe (1), one end port of the steel pipe is faucet part (2), described
The other end port of steel pipe is socket (3), and the faucet part is machined with the successively from the inside to the outside
One arc transition section (4), short tube load section (5), the second circular arc transition (6), short tube
Seal section (7) and the ring baffle (8) positioned at faucet part port, the short tube seal section
On be machined with locating slot, locating ring (9), the end of the socket are welded with the locating slot
Chamfering is provided with mouthful or (10) are closed up.Wherein, locating slot (7) longitudinal section is bow font
Toroidal cavity structure.
A kind of processing method of the spigot-and-socket steel pipe described in claim 1, the method is included such as
Lower step：
, be placed on steel pipe to be processed in the carriage mechanism of rolling pipe-expanding machine first, steel by step one
The socket of pipe is fixed on the position-limit mechanism of rolling enlarging machine tail end, and faucet part expands against rolling
The flaring structure of mouth machine, then regulation rolls pipe-expanding machine moves the flaring mechanism of rolling pipe-expanding machine
To operating position, so turn on the power, first rolled out by flaring mechanism the first circular arc transition and
Short tube load section, then controls flaring mechanism to retreat, and readjusts flaring mechanism in the first circular arc
The second circular arc transition of place is rolled in the contact of transition and short tube load section again and short tube is sealed
Section；
Step 2, the steel pipe after being processed in step one is placed in the carriage mechanism of flange film laminator,
And the faucet part mouth of pipe of steel pipe is placed on the lower mould of flange film laminator, rise flange film laminator
Anti-shake support roller holds steel pipe, then starts motor, by the upper and lower mould of flange film laminator
Coordinate, short tube seal section and mouth of pipe end in the steel pipe faucet part mouth of pipe process positioning respectively
Groove and ring baffle；
Step 3, by step 2 process after steel pipe socket mouth of pipe end carry out chamfered edge or
Shell nosing treatment, obtains spigot-and-socket coupling finished product.
The flaring mechanism be by be arranged in frame (11) track (12), install it is in-orbit
Electronic supporting plate (13) on road, the column (14) being fixed on electronic splint upper surface, peace
In frame and drive horizontal drive apparatus that electronic supporting plate moves horizontally along track, install
The lowering or hoisting gear that expanding device and driving expanding device on column are moved up and down along column
Collectively form, the expanding device be by installed in the rolling pedestal (15) on column,
Installed in rolling pedestal in and rotary shaft stretch out rolling pedestal enlarging motor (16) and be arranged on
What the bistrique (17) in rotary shaft was collectively constituted, the bowl-shape of through hole is provided with centered on the bistrique
Structure；The position-limit mechanism is to be by rack-mounted rotary shaft (18) and fixed installation
What limited cover (19) two parts on the rotating shaft were constituted；The carriage mechanism is by being fixed on
Supporting roller base (20) and a pair on supporting roller base (21) two, anti-skidding tugboats in frame
Divide what is constituted；The horizontal drive apparatus are by horizontal motor (22) and by reductor and water
The drive connection of ordinary telegram machine simultaneously drives the horizontal roller screw (23) two of electronic pallets level movement
What part was constituted；The lowering or hoisting gear is by the lifting motor (24) installed in column top
Pedestal lifting is rolled with being connected in column and by reductor and lifting motor and being driven
Vertical roller screw (25) collectively form；In the rotary shaft of the enlarging motor (16)
Bistrique is provided with, the bistrique is socketed in the rotary shaft of enlarging motor by the through hole at its center,
Keyway is designed with the inner surface of the through hole and on the outer surface of rotary shaft and formed by square key
Synchronized links.
In the technical program, steel pipe to be processed is placed on the anti-of carrier structure by staff
On sliding pallet frame wheel, the position-arresting disk on spacing tailstock is fixedly connected with one end of steel pipe manually then,
Complete preparation.Then control main frame is started, control main frame controls flaring mechanism to steel pipe end
Mouth carries out enlarging action.Its action includes：Horizontal motor passes through reductor and roller screw first
Drive electronic supporting plate to act, by whole flaring structure horizontal movement to Working position, then stop
Action；Secondly, lowering or hoisting gear is started, lifting motor drives ball-screw by rolling by reductor
Pressure pedestal is elevated to specified altitude assignment；Finally, enlarging motor, enlarging motor via reducer are started
Drive bistrique carries out enlarging action to the port of steel pipe.The enlarging action is with its side by bistrique
The mode that surface is slightly below port of steel pipe lower edge rotates and clamp-ons port of steel pipe, so as to reach steel pipe
The enlarging purpose of port, the arcuate flanks of the bistrique form interference and match somebody with somebody with the inwall of port of steel pipe
Close, the bistrique is rotated under the drive of enlarging motor and is advanced slowly under the driving of horizontal motor
Port of steel pipe is clamp-oned, bistrique drives steel pipe to rotate together and slowly clamp-on steel pipe end in the process
Mouthful, so as to reach the purpose of port of steel pipe enlarging, the horizontal displacement of the electronic supporting plate and liter
The height of falling unit lifting is all carried out according to control main frame control.
In the technical program, the flange film laminator can turn over time molding press using seamless steel pipe,
The upper die and lower die of the flange film laminator all for cylinder, and its side surface shape and bellmouth
The shape of portion's locating slot matches.
Above-mentioned technical proposal only embodies the optimal technical scheme of technical solution of the present invention, this technology
The technical staff in field some that to be made to some of which part variations embody this hair
Bright principle, belongs within protection scope of the present invention.
Claims (9)
1. a kind of spigot-and-socket steel pipe, including steel pipe (1), one end port of the steel pipe is to hold
Oral area (2), the other end port of the steel pipe is socket (3), it is characterised in that institute
State faucet part be machined with successively from the inside to the outside the first arc transition section (4), short tube load section (5),
Second circular arc transition (6), short tube seal section (7) and the annular positioned at faucet part port
Baffle plate (8), is machined with locating slot (9), the end of the socket on the short tube seal section
Chamfering is provided with mouthful or (10) are closed up.
2. spigot-and-socket steel pipe according to claim 1, it is characterised in that the locating slot
(9) longitudinal section is the toroidal cavity structure for bending font.
3. the processing method of the spigot-and-socket steel pipe described in a kind of claim 1, it is characterised in that
The method comprises the following steps：
, be placed on steel pipe to be processed in the carriage mechanism of rolling pipe-expanding machine first, steel by step one
The socket of pipe is fixed on the position-limit mechanism of rolling enlarging machine tail end, and faucet part expands against rolling
The flaring structure of mouth machine, then regulation rolls pipe-expanding machine moves the flaring mechanism of rolling pipe-expanding machine
To operating position, so turn on the power, first rolled out by flaring mechanism the first circular arc transition and
Short tube load section, then controls flaring mechanism to retreat, and readjusts flaring mechanism in the first circular arc
The second circular arc transition of place is rolled in the contact of transition and short tube load section again and short tube is sealed
Section；
Step 2, the steel pipe after being processed in step one is placed in the carriage mechanism of flange film laminator,
And the faucet part mouth of pipe of steel pipe is placed on the lower mould of flange film laminator, rise flange film laminator
Anti-shake support roller holds steel pipe, then starts motor, by the upper and lower mould of flange film laminator
Coordinate, short tube seal section and mouth of pipe end in the steel pipe faucet part mouth of pipe process positioning respectively
Groove and ring baffle；
Step 3, by step 2 process after steel pipe socket mouth of pipe end carry out chamfered edge or
Shell nosing treatment, obtains spigot-and-socket coupling finished product.
4. the processing method of spigot-and-socket steel pipe according to claim 3, it is characterised in that
The flaring mechanism be by be arranged in frame (11) track (12), install in orbit
Electronic supporting plate (13), be fixed on electronic splint upper surface column (14), be arranged on
In frame and drive horizontal drive apparatus that electronic supporting plate moves horizontally along track, installed in vertical
Expanding device and driving expanding device on post is common along the lowering or hoisting gear that column is moved up and down
Constitute, the expanding device be by installed in the rolling pedestal (15) on column,
Installed in rolling pedestal in and rotary shaft stretch out rolling pedestal enlarging motor (16) and be arranged on
What the bistrique (17) in rotary shaft was collectively constituted, the bowl-shape of through hole is provided with centered on the bistrique
Structure.
5. the processing method of spigot-and-socket steel pipe according to claim 3, it is characterised in that
The position-limit mechanism is to be by rack-mounted rotary shaft (18) and be fixedly mounted on rotation
What limited cover (19) two parts on axle were constituted.
6. the processing method of spigot-and-socket steel pipe according to claim 3, it is characterised in that
The carriage mechanism is supporting roller base (20) by being fixed in frame and on supporting roller base
What a pair anti-skidding tugboat (21) two parts were constituted.
7. the processing method of spigot-and-socket steel pipe according to claim 4, it is characterised in that
The horizontal drive apparatus are by horizontal motor (22) and by reductor and the biography of horizontal motor
Dynamic connection simultaneously drives what horizontal roller screw (23) two parts that electronic pallets level is moved were constituted.
8. the processing method of spigot-and-socket steel pipe according to claim 4, it is characterised in that
The lowering or hoisting gear is by the lifting motor (24) installed in column top and in column
And the vertical roller bearing silk for being connected by reductor and lifting motor and driving rolling pedestal to lift
Thick stick (25) is collectively formed.
9. the processing method of spigot-and-socket steel pipe according to claim 4, it is characterised in that
Bistrique is provided with the rotary shaft of the enlarging motor (16), the bistrique is by its center
Through hole is socketed in the rotary shaft of enlarging motor, outer with rotary shaft on the inner surface of the through hole
Keyway is designed with surface and synchronized links are formed by square key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006231.4A CN106931244B (en) | 2015-12-29 | 2015-12-29 | Spigot-and-socket steel pipe and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006231.4A CN106931244B (en) | 2015-12-29 | 2015-12-29 | Spigot-and-socket steel pipe and its processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106931244A true CN106931244A (en) | 2017-07-07 |
| CN106931244B CN106931244B (en) | 2018-10-30 |
Family
ID=59457266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511006231.4A Active CN106931244B (en) | 2015-12-29 | 2015-12-29 | Spigot-and-socket steel pipe and its processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106931244B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894873A (en) * | 2019-04-11 | 2019-06-18 | 开平力蒲卫浴有限公司 | A kind of process units and its application method of sewer pipe |
| CN110005885A (en) * | 2019-04-29 | 2019-07-12 | 湖南振辉管业有限公司 | A kind of enhanced steel pipe of bellmouth and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048445A (en) * | 1989-06-30 | 1991-01-09 | 蓬塔穆松公司 | The sealing gasket of leakproof locked joints |
| CN1274060A (en) * | 2000-02-16 | 2000-11-22 | 程宇鸣 | Expansion shaped insertion-type steel tubes for both flexible and rigid joining and its manufacture technology |
| CN1374472A (en) * | 2002-02-06 | 2002-10-16 | 湖州金洲管业有限公司 | Spigot and socket joint steel pipe and its manufacture |
| CN2637866Y (en) * | 2003-08-29 | 2004-09-01 | 陈阵 | Insertion type pipe adapter |
| US20090173130A1 (en) * | 2008-01-04 | 2009-07-09 | Cerro Flow Products, Inc. | Fluid conduits with integral end fittings and associated methods of manufacture and use |
-
2015
- 2015-12-29 CN CN201511006231.4A patent/CN106931244B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048445A (en) * | 1989-06-30 | 1991-01-09 | 蓬塔穆松公司 | The sealing gasket of leakproof locked joints |
| CN1274060A (en) * | 2000-02-16 | 2000-11-22 | 程宇鸣 | Expansion shaped insertion-type steel tubes for both flexible and rigid joining and its manufacture technology |
| CN1374472A (en) * | 2002-02-06 | 2002-10-16 | 湖州金洲管业有限公司 | Spigot and socket joint steel pipe and its manufacture |
| CN2637866Y (en) * | 2003-08-29 | 2004-09-01 | 陈阵 | Insertion type pipe adapter |
| US20090173130A1 (en) * | 2008-01-04 | 2009-07-09 | Cerro Flow Products, Inc. | Fluid conduits with integral end fittings and associated methods of manufacture and use |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894873A (en) * | 2019-04-11 | 2019-06-18 | 开平力蒲卫浴有限公司 | A kind of process units and its application method of sewer pipe |
| CN109894873B (en) * | 2019-04-11 | 2023-12-01 | 开平力蒲卫浴有限公司 | Sewer pipeline production device and application method thereof |
| CN110005885A (en) * | 2019-04-29 | 2019-07-12 | 湖南振辉管业有限公司 | A kind of enhanced steel pipe of bellmouth and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106931244B (en) | 2018-10-30 |
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Address after: 300 000 meters north of Sidangkou Houcun Village, Caigongzhuang Town, Jinghai District, Tianjin Patentee after: TIANJIN JIUSHENG TONGDA TECHNOLOGY CO.,LTD. Address before: 300 000 meters west of Hulianzhuang Village, Daqiuzhuang Town, Jinghai County, Tianjin Patentee before: TIANJIN JIUSHENG TONGDA STEEL PIPE TECHNOLOGY CO.,LTD. |
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Address after: No. 2 Guangyuan Road, Tangguantun Processing and Logistics Zone, Jinghai District, Tianjin, 300000 Patentee after: TIANJIN JIUSHENG TONGDA TECHNOLOGY CO.,LTD. Address before: 300 000 meters north of Sidangkou Houcun Village, Caigongzhuang Town, Jinghai District, Tianjin Patentee before: TIANJIN JIUSHENG TONGDA TECHNOLOGY CO.,LTD. |
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