CN110005883A - A kind of connection method that gas pipeline is not got angry - Google Patents
A kind of connection method that gas pipeline is not got angry Download PDFInfo
- Publication number
- CN110005883A CN110005883A CN201910281523.0A CN201910281523A CN110005883A CN 110005883 A CN110005883 A CN 110005883A CN 201910281523 A CN201910281523 A CN 201910281523A CN 110005883 A CN110005883 A CN 110005883A
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- Prior art keywords
- wall
- angry
- gas pipeline
- connection method
- main part
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Classifications
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- 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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
- F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars
- F16L13/161—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars the pipe or collar being deformed by crimping or rolling
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipeline Systems (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The invention discloses a kind of connection methods that gas pipeline is not got angry, including reconnaissance survey, finished product processing, field installation steps.The connection method that gas pipeline of the present invention is not got angry, turn fractions use bending machine one-pass molding, no longer need to keep engineering overall beautiful using bend pipe tools；Connection between pipeline connects one-pass molding using hydraulic tube piece, and whole flames of anger operation reduces installation process risk, and simple installation is quick.
Description
Technical field
The invention belongs to gas pipeline mounting technique fields, and in particular to a kind of connection method that gas pipeline is not got angry.
Background technique
Natural gas is used for convenience of resident, natural gas need to be accessed every household by pipeline.Currently, in combustion gas erector
Cheng Zhonghui largely uses bend pipe tools, i.e., needs to install bend pipe tools in the bending place that pipeline needs to change path, thus will
It is overall beautiful to influence engineering.In connecting pipe, a tie point need to be pressed twice, and hydraulic chuck is excessive.It installed at the scene
The case where Cheng Zhong, chance insufficient space, it can not just implement pipeline connection.In addition, in resident's indoor installation civil natural gas pipeline,
Connection between pipeline generally uses the connection of ring pressure, welding or silk mouth connection type.Connection type is pressed for ring, exists and connects
It is easily fallen off when the tensile resistance of contact is poor, combustion gas introduces standpipe chance surface subsidence, aging easily occurs for the rubber mat in pipe fitting
The disadvantages of, if fire occurs in place, the pipeline in region of over-firing leaks certainly, therefore reliability is poor.It is wanted by specification
It asks, pad need to carry out non-destructive testing, and city Pipe installing is densely populated, and pipeline carries out non-destructive testing the crowd that need to evacuate, and implement
Detection time section should be at night, therefore it is big to coordinate difficulty, and construction period belongs to work with torches, to scene fire prevention job requirements compared with
It is high.According to silk mouth connection type, after fire occurs, junction will appear leakage；Silk mouth connecting pipe is using more, also easily
It leaks, security performance is poor.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of connection methods that gas pipeline is not got angry.
In order to achieve the above objectives, the invention provides the following technical scheme:
A kind of connection method that gas pipeline is not got angry of the present invention, comprising the following steps:
S1: reconnaissance survey is carried out to erecting bed, in-site measurement works out construction drawing；To the construction drawing of establishment into
The position distribution of tubing, connector and supporting point and quantity performed statistics are indicated in row number processing.
S2: finished product processing is numbered by construction drawing and carries out pipeline section processing, and turning or approach irregular shaped region use
Hydraulic pipe bender carries out cold working bent tube technique.
S3: in-site installation transports finished product to scene, is distributed fixed support bracket by construction drawing, presses finished product
Number stringing is fixed, uses gas riser connecting pipe to carry out hydraulic connecting between pipeline, and construction is completed.
Further, after bent tube technique, appearance, thinned and pressure check are carried out to processing finished product；It is qualified to examining
Finished product carry out outer protection, prevent the collsion damage that may occur in transportational process.
Further, in S3, gas riser connecting pipe includes main pipe body, a pair of the lid being sleeved in main pipe body
Cap；Main pipe body includes main part and the outer wall set on the auxiliary section at main part both ends, in auxiliary section and main part junction
It is equipped with limiting section, the sealing ring that the inner wall in auxiliary section is outwardly protruded circumferentially arranged with opposed inner walls, opposing seal ring is being matched
Circumferentially arranged with the bulge loop outwardly protruded on the outer wall in conjunction portion；The inner wall of nut cap and bulge loop extrusion fit.
Further, the outer diameter of main part is greater than the outer diameter of auxiliary section, and the outer wall surface of main part is smooth cylindrical curved surface.
Further, nut cap includes press section and interconnecting piece, and the inner wall of press section and the outer wall of auxiliary section are engaged company
It connects, the inner wall of interconnecting piece and the outer wall of main part are engaged connection.
Further, limit the stepped structure in position, also be provided on the outer wall of press section and interconnecting piece junction with
The step structure that limiting section matches.
Further, it when nut cap is installed in main pipe body, is engaged between the connection end surface of nut cap.
Further, the through-hole through main part and interconnecting piece is equipped on the side wall of connecting pipe.
Further, the tee branch that through-hole is connected with perforation through-hole, the outer end of tee branch are corresponded on main part
Extend outwardly after interconnecting piece.
Further, circumferentially arranged with rubber seal on the inner wall of auxiliary section and main part junction；In auxiliary section
Inner wall on also be provided with the sealing ring that opposed inner walls outwardly protrude close to outer end.
The beneficial effects of the present invention are: the connection method that gas pipeline of the present invention is not got angry, turn fractions use bend pipe
Machine one-pass molding no longer needs to keep engineering overall beautiful using bend pipe tools；Connection between pipeline is using hydraulic tube piece connection one
Secondary molding, whole flames of anger operation reduce installation process risk, and simple installation is quick.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out
Illustrate:
Gas riser connecting pipe schematic structural cross-sectional view in the connection method that Fig. 1 does not get angry for gas pipeline of the present invention.
Another structure section view signal of gas riser connecting pipe in the connection method that Fig. 2 does not get angry for gas pipeline of the present invention
Figure.
Fig. 3 is that the tee branch of gas riser connecting pipe in connection method that gas pipeline of the present invention is not got angry is branch pipe
Structural schematic diagram.
Fig. 4 is that the tee branch of gas riser connecting pipe in connection method that gas pipeline of the present invention is not got angry is bend pipe
Structural schematic diagram.
In figure, 1 is main pipe body, and 2 be nut cap, and based on 10,11 be auxiliary section, and 12 be limiting section, and 110 be sealing
Ring, 111 be bulge loop, and 20 be press section, and 21 be interconnecting piece, and 22 be inclined-plane, and 3 be through-hole, and 4 be tee branch, and 5 be rubber seal
Circle.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It better understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
A kind of connection method that gas pipeline is not got angry of the present invention, is used in gas fitting works, as in resident room
Gas pipeline installation, installation exercise process are not got angry.Specifically includes the following steps: S1: reconnaissance survey is carried out to erecting bed, it is existing
Field measurement works out construction drawing；Processing is numbered to the construction drawing of establishment, indicates the position distribution of tubing, connector and supporting point simultaneously
Quantity performed statistics.It may determine that two required logical or threeway connections of the deposition path of pipeline, pipeline connection by this step
The quantity of pipe fitting and the position of turning part and quantity, to carry out the finished product processing of next step.S2: finished product processing, by construction
Figure number carries out pipeline section processing, turning or approach irregular shaped region and carries out cold working bent tube technique using hydraulic pipe bender.It is i.e. logical
It crosses and needs the part turned in advance in special processing workshop by hydraulic pipe bender processing gas pipeline, instead of traditional curved
Head tube part.S3: in-site installation transports finished product to scene, is distributed fixed support bracket by construction drawing, consolidates by finished product number stringing
Hydraulic connecting is carried out using gas riser connecting pipe between fixed, pipeline, completes construction.I.e. the present invention is by using gas riser
Connecting pipe replaces the traditional connection of ring pressure, welding or silk mouth connection type, and pipe fitting connection one-pass molding may be implemented, whole
Flames of anger operation reduces installation process risk, and simple installation is quick.
In present embodiment, after bent tube technique, appearance, thinned and pressure check are carried out to processing finished product；To inspection
Qualified finished product carries out outer protection, prevents the collsion damage that may occur in transportational process.
As shown in Figure 1, gas riser connecting pipe includes main pipe body 1 made of metal material, is set to pipe fitting in S3
A pair of of nut cap 2 in main body 1.Main pipe body 1, the planform of nut cap 2 are whole in tubular construction, in use, nut cap 2 covers respectively
Mounted in the two sides of main pipe body 1.Main pipe body 1 is including main part 10 and set on the auxiliary section 11 at 10 both ends of main part, main body
Portion 10 and auxiliary section 11 are structure as a whole.It is equipped with limiting section 12 on the outer wall of auxiliary section 11 and 10 junction of main part, works as lid
When cap 2 is sleeved in main pipe body 1, limiting section 12 is used to limit nut cap 2 along axial displacement.Inner wall edge week in auxiliary section 11
To being equipped with the sealing ring 110 that outwardly protrudes of opposed inner walls, opposing seal ring 110 on the outer wall of auxiliary section 11 circumferentially arranged with to
The bulge loop 111 of outer protrusion, the inner wall of nut cap 2 and 111 extrusion fit of bulge loop.
The working principle of gas riser connecting pipe are as follows: nut cap 2 is mounted in main pipe body 1 in advance, by two combustions to be connected
The end of gas standpipe is inserted into main pipe body 1 from both ends respectively, using dedicated hydraulic tongs pressure make nut cap 2 along axial direction from both ends to
It moves in the middle part of main pipe body 1 with from radial compression bulge loop 111, so that sealing ring 110 be made to be squeezed diminution and and natural gas tube
Interference fit is formed between road, i.e. realization linear sealing or face sealing to realize the purpose of connection natural gas line, and can reach
Sealing effect prevents natural gas leaking；Whole process disposably crimps completion, convenient and efficient.
In the present embodiment, the outer diameter of main part 10 is greater than the outer diameter of auxiliary section 11, and the outer wall surface of main part 10 is
Smooth cylindrical curved surface.Be limited the axial position of preparing natural gas pipe end, and the internal diameter of main part 10 is less than the internal diameter of auxiliary section 11,
That is the inner wall protrusion in the inner wall relative engagement portion 11 of main part 10, so that the internal diameter of main part 10 is less than the outer of natural gas line
Diameter, so as to limit the axial position of natural gas line.
Nut cap 2 includes press section 20 and interconnecting piece 21, and the inner wall of press section 20 and the outer wall of auxiliary section 11 are engaged company
It connects, the inner wall of interconnecting piece 21 is engaged with the outer wall of main part 10 to be connect.In the present embodiment, the inner wall of press section 20 is straight
Diameter is equal to or slightly greater than the outer diameter of auxiliary section 11, but the inner diameter of press section 20 is less than the outer of 11 convex ring 111 of auxiliary section
Diameter as long as press section 20 is enable to be sleeved on auxiliary section 11, and enables press section 20 squeeze bulge loop under the effect of external force
111, so that auxiliary section 11 can form interference fit between natural gas line to be tightly connected.In the present embodiment,
It close to the internal partial wall face of interconnecting piece 21 is that diameter is gradually from outside to inside in the press section 20 to keep extruding movement more smooth
The inclined-plane 22 to become larger.
In the present embodiment, 12 stepped structures of limiting section, in the outer of 21 junction of press section 20 and interconnecting piece
The step structure matched with limiting section 12 also is provided on wall.
When nut cap 2 is installed in main pipe body 1, it is engaged between 21 end face of interconnecting piece of nut cap 2, i.e. two nut caps
A regular cylindrical structure is integrally formed in 2 outer surface, so that natural gas line is after the completion of connection, the connection of junction
Pipe fitting appearance is overall beautiful.
As shown in Figures 2 to 4, as a further improvement, being equipped on the side wall of connecting pipe through main part 10 and being connected
The through-hole 3 of socket part 21.Correspond to the tee branch 4 that through-hole 3 is connected with perforation through-hole 3 on main part 10, tee branch 4 it is outer
End extends outwardly after interconnecting piece 21, can connect by welding between tee branch 4 and main part 10, practical raw
Processing can be customized in advance in factory when production, use fire operation, certain tee branch 4 and main part 10 to avoid in-site installation
Between can also be integrally designed.Also can be using " hydraulic tube piece connection " one-pass molding to make the threeway of resident connect, it can
By property height.Originally in the present embodiment, tee branch 4 is straight tube, and in another embodiment, tee branch 4 is bend pipe.
Further to ensure sealing effect, circumferentially arranged with rubber on the inner wall of auxiliary section 11 and 10 junction of main part
Sealing ring 5 forms linear sealing or face sealing because having passed through sealing ring 110 between connecting pipe and natural gas line, even if hair
Calamity of lighting a fire makes 5 temperature distortion of rubber seal or thawing, will not influence sealing effect and cause to leak.Inner wall in auxiliary section 11
Upper also to be provided with the sealing ring 110 that opposed inner walls outwardly protrude close to outer end, the quantity of sealing ring 110 can according to need setting one
It is a or multiple.
In the present embodiment, gas riser connecting pipe is integrally in symmetrical structure；In other embodiments, combustion gas is vertical
Pipe connected pipe fitting is integrally in unsymmetric structure, and the component at gas riser connecting pipe both ends is such as designed as different sizes, shape
Shape.
Gas riser connecting pipe replaces the connection of ring pressure, welding or the connection of silk mouth, and there are following advantages: 1, scene is not necessarily to
Fire operation evades the fire risk in installation process.2, quick for installation, after each household need to only connect upper and lower line pipe part,
Disposable crimping is clamped with the use of dedicated hydraulic, connection can be completed within 20 seconds.3, fire such as occurs, standpipe will not occur before table
Leakage situation.
The connection method that gas pipeline of the present invention is not got angry, turn fractions use bending machine one-pass molding, no longer need to using
Bend pipe tools keep engineering overall beautiful；Connection between pipeline connects one-pass molding, whole flames of anger operation using hydraulic tube piece
Installation process risk is reduced, simple installation is quick.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention
Protection scope within.Protection scope of the present invention is subject to claims.
In the description of the present invention, it is to be understood that, if occur term " center ", " longitudinal direction ", " transverse direction ", "upper",
The orientation or position of the instructions such as "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside"
Relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without referring to
Show or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage
Solution is limitation of the present invention.In addition, being used for description purposes only if there is term " first ", " second " etc., and cannot understand
For indication or suggestion relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " etc. can explicitly or implicitly include one or more of the features.In the description of the present invention, it removes
Non- to be otherwise noted, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, if there is term " peace
Dress ", " connected ", " connection ", shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or one
Ground connection；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, the indirect phase of intermediary can also be passed through
Even, it can be the connection inside two elements.For the ordinary skill in the art, can be understood by concrete condition
The concrete meaning of above-mentioned term in the present invention.
Claims (10)
1. a kind of connection method that gas pipeline is not got angry, which comprises the following steps:
S1: reconnaissance survey is carried out to erecting bed, in-site measurement works out construction drawing；Processing is numbered to the construction drawing of establishment,
Indicate the position distribution of tubing, connector and supporting point and quantity performed statistics；
S2: finished product processing carries out pipeline section processing by construction drawing number, turning or approach irregular shaped region use hydraulic pipe bender into
Row cold working bent tube technique；
S3: in-site installation transports finished product to scene, be distributed fixed support bracket by construction drawing, fixed by finished product number stringing,
Hydraulic connecting is carried out using gas riser connecting pipe between pipeline, completes construction.
2. the connection method that gas pipeline according to claim 1 is not got angry, which is characterized in that after bent tube technique,
Appearance, thinned and pressure check are carried out to processing finished product；To examining qualified finished product to carry out outer protection, preventing can in transportational process
The collsion damage that can occur.
3. the connection method that gas pipeline according to claim 1 is not got angry, which is characterized in that in S3, the combustion
A pair of of nut cap that gas standpipe connecting pipe includes main pipe body, is sleeved in the main pipe body；The main pipe body includes master
Body portion and set on the auxiliary section at the main part both ends, sets on outer wall of the auxiliary section with the main part junction
There is limiting section, the sealing ring that the inner wall in the auxiliary section is outwardly protruded circumferentially arranged with opposed inner walls, the relatively described sealing ring
Circumferentially arranged with the bulge loop outwardly protruded on the outer wall of the auxiliary section；The inner wall of the nut cap is matched with bulge loop extruding
It closes.
4. the connection method that gas pipeline according to claim 3 is not got angry, which is characterized in that the outer diameter of the main part
Greater than the outer diameter of the auxiliary section, the outer wall surface of the main part is smooth cylindrical curved surface.
5. the connection method that gas pipeline according to claim 3 is not got angry, which is characterized in that the nut cap includes squeezing
Portion and interconnecting piece, the inner wall of the press section are engaged with the outer wall of the auxiliary section and connect, the inner wall of the interconnecting piece with
The outer wall of the main part is engaged connection.
6. the connection method that gas pipeline according to claim 5 is not got angry, which is characterized in that the limit position is in rank
Ladder configuration also is provided with the ladder matched with the limiting section on the outer wall of the press section and the interconnecting piece junction
Shape structure.
7. the connection method that gas pipeline according to claim 6 is not got angry, which is characterized in that when the nut cap is installed in
When in the main pipe body, it is engaged between the connection end surface of nut cap.
8. the connection method that the gas pipeline according to any one of claim 5-7 is not got angry, which is characterized in that connecting
The side wall of pipe fitting is equipped with the through-hole through the main part and the interconnecting piece.
9. the connection method that gas pipeline according to claim 8 is not got angry, which is characterized in that right on the main part
The through-hole is answered to be connected with the tee branch for penetrating through the through-hole, the outer end of the tee branch is after interconnecting piece to extension
It stretches.
10. the connection method that gas pipeline according to claim 3 is not got angry, which is characterized in that the auxiliary section with
Circumferentially arranged with rubber seal on the inner wall of the main part junction；It is also set on the inner wall of the auxiliary section close to outer end
There is the sealing ring that opposed inner walls outwardly protrude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910281523.0A CN110005883B (en) | 2019-04-09 | 2019-04-09 | Method for connecting gas pipeline without firing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910281523.0A CN110005883B (en) | 2019-04-09 | 2019-04-09 | Method for connecting gas pipeline without firing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110005883A true CN110005883A (en) | 2019-07-12 |
| CN110005883B CN110005883B (en) | 2020-07-24 |
Family
ID=67170635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910281523.0A Active CN110005883B (en) | 2019-04-09 | 2019-04-09 | Method for connecting gas pipeline without firing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110005883B (en) |
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| WO1990000697A1 (en) * | 1988-07-13 | 1990-01-25 | Mie Horo Co., Ltd. | Coupling means and method for pipe material |
| EP0513292B1 (en) * | 1990-11-30 | 1996-02-21 | Hewing GmbH | Tube joint, in particular for composite tubes |
| CN101811154A (en) * | 2009-02-19 | 2010-08-25 | 中国石油天然气管道局 | Method for producing hot-bending elbow |
| CN203162380U (en) * | 2013-03-31 | 2013-08-28 | 徐志超 | Connector used for seal connection of pipelines |
| CN103791157A (en) * | 2014-01-17 | 2014-05-14 | 洛阳广鑫建设集团有限公司 | Construction technology for natural gas pipeline |
| CN105221835A (en) * | 2015-10-29 | 2016-01-06 | 浙江铭仕集团有限公司 | The method of construction of gas pipeline system |
| CN106641439A (en) * | 2017-01-22 | 2017-05-10 | 高新伟 | Fabricated construction method for above-ground public gas pipeline system |
| CN207437478U (en) * | 2017-09-21 | 2018-06-01 | 中国三冶集团有限公司 | Oxygen mix natural gas power pipe network big diameter elbow machine hydraulic system |
| CN108916470A (en) * | 2018-09-26 | 2018-11-30 | 上海煤气第二管线工程有限公司 | A kind of natural gas line construction method based on construction protecting device |
| CN109345410A (en) * | 2018-09-26 | 2019-02-15 | 上海煤气第二管线工程有限公司 | A kind of acquisition of town gas pipe construction data and management method |
-
2019
- 2019-04-09 CN CN201910281523.0A patent/CN110005883B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990000697A1 (en) * | 1988-07-13 | 1990-01-25 | Mie Horo Co., Ltd. | Coupling means and method for pipe material |
| EP0513292B1 (en) * | 1990-11-30 | 1996-02-21 | Hewing GmbH | Tube joint, in particular for composite tubes |
| CN101811154A (en) * | 2009-02-19 | 2010-08-25 | 中国石油天然气管道局 | Method for producing hot-bending elbow |
| CN203162380U (en) * | 2013-03-31 | 2013-08-28 | 徐志超 | Connector used for seal connection of pipelines |
| CN103791157A (en) * | 2014-01-17 | 2014-05-14 | 洛阳广鑫建设集团有限公司 | Construction technology for natural gas pipeline |
| CN105221835A (en) * | 2015-10-29 | 2016-01-06 | 浙江铭仕集团有限公司 | The method of construction of gas pipeline system |
| CN106641439A (en) * | 2017-01-22 | 2017-05-10 | 高新伟 | Fabricated construction method for above-ground public gas pipeline system |
| CN207437478U (en) * | 2017-09-21 | 2018-06-01 | 中国三冶集团有限公司 | Oxygen mix natural gas power pipe network big diameter elbow machine hydraulic system |
| CN108916470A (en) * | 2018-09-26 | 2018-11-30 | 上海煤气第二管线工程有限公司 | A kind of natural gas line construction method based on construction protecting device |
| CN109345410A (en) * | 2018-09-26 | 2019-02-15 | 上海煤气第二管线工程有限公司 | A kind of acquisition of town gas pipe construction data and management method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110005883B (en) | 2020-07-24 |
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Effective date of registration: 20200827 Address after: 225700 Yanghua Industrial Concentration Zone, Duotian Town, Xinghua City, Taizhou City, Jiangsu Province Patentee after: JIANGSU ZHONGDING TECHNOLOGY ENGINEERING Co.,Ltd. Address before: 401220 Gufocun Group 2, Changshou District, Chongqing Patentee before: Lei Yang |