CN109538843B - Branching natural gas pipeline - Google Patents
Branching natural gas pipeline Download PDFInfo
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- CN109538843B CN109538843B CN201910015896.3A CN201910015896A CN109538843B CN 109538843 B CN109538843 B CN 109538843B CN 201910015896 A CN201910015896 A CN 201910015896A CN 109538843 B CN109538843 B CN 109538843B
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- pipe
- diffusing
- wall
- hole
- sleeve
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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
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
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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
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/163—Branch units ; Insulation forming a whole with branches
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a branch natural gas pipeline, which relates to the technical field of natural gas pipelines and at least comprises a pipe body, wherein a diffusing mechanism is arranged on the pipe body, and the diffusing mechanism at least comprises a diffusing pipe, an air outlet pipe, a diffusing valve and a detachable driving rod; the inner of the diffusing pipe is transversely provided with a sealing clapboard for sealing the hole of the diffusing pipe, the opening part at the lower end of the diffusing pipe positioned in the pipe body is positioned with an ash collecting barrel, the outlet pipe comprises a main pipe and a branch pipe, the inner of the main pipe is coaxially provided with a sleeve pipe, the sleeve pipe is internally provided with a hole opener which can slide up and down along the inner wall of the sleeve pipe, and the hole opener is matched with the inner wall of the sleeve pipe in a sliding sealing way. The invention provides a natural gas pipeline which can be provided with a hole and branched without cutting off natural gas transportation.
Description
Technical Field
The invention relates to the technical field of natural gas pipelines, in particular to a branch natural gas pipeline.
Background
Existing natural gas pipelines are often made of PE (polyethylene) pipe fittings. The pipe fitting made of the material has the advantages of strong corrosion resistance, convenience in installation, low price and the like.
In the use of the natural gas pipeline, the natural gas pipeline needs to be opened and shunted at times, the diffusing interfaces are reserved on part of pipe fittings, and the branch pipeline is led out through the diffusing interfaces and is more convenient and reliable than the branch pipeline led out from the smooth pipe wall.
The transportation of natural gas often need be cut off to current interface of diffusing when drawing forth the branch pipeline, will diffuse the interface again and carry out the trompil intercommunication, otherwise can cause the leakage of natural gas. However, the natural gas cut-off can affect the normal transportation of the natural gas pipeline, inconvenience is brought to life of people, and economic loss is brought to construction units or operation units.
Disclosure of Invention
The invention aims to solve the problems and provides a natural gas pipeline which can be provided with a hole for branching without cutting off natural gas transportation.
In order to achieve the purpose, the invention adopts the following technical scheme: a natural gas pipeline capable of branching at least comprises a pipe body,
the pipe body is provided with a diffusing mechanism, and the diffusing mechanism at least comprises a diffusing pipe, an air outlet pipe, a diffusing valve and a detachable driving rod;
the diffusion pipe is erected on the outer wall of the pipe body and is integrally formed with the pipe body, and the diffusion pipe is communicated with the pipe hole of the pipe body; a sealing clapboard for sealing the pipe hole of the diffusing pipe is transversely arranged in the diffusing pipe, and the sealing clapboard and the inner wall of the diffusing pipe are integrally formed;
an ash collecting barrel is positioned at the opening at the lower end of the diffusing pipe positioned in the pipe body, the bottom of the inner cavity of the ash collecting barrel is provided with an ash collecting groove, and the side wall of the ash collecting barrel is provided with a plurality of communicating ports for communicating pipe holes of the pipe body with pipe holes of the diffusing pipe;
the air outlet pipe comprises a main pipe and a branch pipe, the main pipe is longitudinally arranged, the lower end of the main pipe is connected with the upper end of the diffusing pipe through an electric melting pipe, the branch pipe is transversely arranged, one end of the branch pipe is connected and communicated with the pipe wall of the main pipe, a sleeve is coaxially arranged in the main pipe, the outer wall of the sleeve is fixedly attached to the inner wall of the main pipe, the inner wall of the sleeve is smooth, a notch used for being communicated with the branch pipe is formed in the pipe wall of the sleeve, a hole opener capable of sliding up and down along the inner wall of the sleeve is arranged in the sleeve, and the hole opener is;
the center of the top of the hole digger is provided with a driving rod positioning groove, the lower end of the driving rod is provided with a polygonal starting head which can be clamped with the driving rod positioning groove, and the polygonal starting head and the driving rod positioning groove are connected through a clamping mechanism and cannot rotate relatively;
one end of the bleeding valve is connected with the other end of the branch pipe through an electric melting pipe fitting.
Preferably, the communicating openings are all provided with filter screens.
Preferably, the cross section of the driving rod positioning groove is a regular hexagon, and the cross section of the polygonal starting head is also a regular hexagon.
Preferably, the clamping mechanism between the polygonal starting head and the driving rod positioning groove is as follows: a ball slide way is transversely arranged in the polygonal starting head, a ball is arranged in the ball slide way, the ball can slide along the ball slide way, the front side of the ball extends out of the side wall of the polygonal starting head, and a compression spring is arranged at the rear side of the ball; the inner wall of the driving rod positioning groove is provided with a ball clamping groove which can be clamped with balls.
Preferably, a handle is arranged at the upper end of the driving rod.
Preferably, the tapper is sequentially divided into a welding section, an upper external thread section, a sealing section, a lower external thread section and a tapping knife from top to bottom;
the upper end port of the main pipe is a welding hole which can be clamped with the welding section, and the inner wall of the welding hole is annularly provided with an electric heating wire for welding with the welding section;
the upper external thread section is provided with external threads, and the inner side of the welding hole is provided with an upper internal thread section which can be screwed with the upper external thread section;
the sealing section is in sliding sealing fit with the inner wall of the sleeve;
the lower external thread section is provided with external threads, and the lower part of the inner side of the sleeve is provided with a lower internal thread section which can be screwed with the lower external thread section;
the tapping knife is an annular knife head with a knife edge facing downwards.
Preferably, a plurality of O-shaped sealing rings are annularly arranged on the sealing section, and the O-shaped sealing rings are in sliding sealing fit with the inner wall of the sleeve.
Therefore, the invention has the following beneficial effects: 1. the natural gas pipeline does not need to be cut off, and the holes can be opened to communicate with the diffusing interface when the natural gas is normally transported, so that the normal life of people is guaranteed, and the economic loss of a construction unit or an operation unit is reduced; 2. the lower external thread section and the lower internal thread section are arranged, and the screw thread fit is utilized to increase the downward pressure of the tapping knife during tapping, so that the problems that the downward pressure is insufficient by the hand of an operator alone and tapping is laborious are solved; 3. the hole digger that sets up can be used for the trompil, when need not to use the interface of diffusing in the later stage, can regard as the sealed interface of diffusing of end cap again and use.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional view of the polygonal start and drive rod positioning slot of the present invention.
FIG. 3 is a sectional view of the dust-collecting container of the present invention.
Fig. 4 is a sectional view of the outlet pipe in the present invention.
Fig. 5 is a schematic view showing the structure of the hole cutter of the present invention.
Fig. 6 is a partial sectional view showing a state in which the hole of the hole cutter of the present invention is opened.
Fig. 7 is a partial sectional view showing a state where the hole cutter is raised in the present invention.
FIG. 8 is a schematic view showing a state where the opening is completed in the present invention.
Fig. 9 is an enlarged view at a in fig. 8.
1: a pipe body; 2: a bleed valve; 3: a drive rod; 301: starting from a polygon; 302: a ball ramp; 303: a ball bearing; 304: a compression spring; 305: a handle; 4: a dust collecting cylinder; 401: a dust collecting groove; 402: a communication port; 403: a filter screen; 5: a diffusing pipe; 501: sealing the partition plate; 6: an air outlet pipe; 601: a main pipe; 602: a branch pipe; 603: fusion holes; 604: an electric heating wire; 605: an upper internal thread section; 606: a lower internal thread section; 7: electrically melting the pipe fittings; 8: a sleeve; 801: a notch; 9: a hole opener; 901: a welding section; 902: an upper external thread section; 903: a sealing section; 904: a lower external thread section; 905: a tapping knife; 906: an O-shaped sealing ring; 907: a drive rod positioning slot; 908: ball draw-in groove.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 9, a branching natural gas pipeline at least comprises a pipe body 1, wherein a diffusing mechanism is arranged on the pipe body 1, and the diffusing mechanism at least comprises a diffusing pipe 5, an air outlet pipe 6, a diffusing valve 2 and a detachable driving rod 3.
The diffusing pipe 5 is erected on the outer wall of the pipe body 1 and is integrally formed with the pipe body 1, and the diffusing pipe 5 is communicated with the pipe hole of the pipe body 1; a sealing clapboard 501 used for sealing the pipe hole of the diffusing pipe 5 is transversely arranged in the diffusing pipe 5, and the sealing clapboard 501 and the inner wall of the diffusing pipe 5 are integrally formed.
An ash collecting barrel 4 is positioned at the lower end opening of the diffusing pipe 5 positioned in the pipe body 1, an ash collecting groove 401 is formed in the bottom of an inner cavity of the ash collecting barrel 4, and a plurality of communicating ports 402 used for communicating pipe holes of the pipe body 1 and pipe holes of the diffusing pipe 5 are formed in the side wall of the ash collecting barrel 4. The communication ports 402 are provided with filter screens 403, as shown in fig. 3.
The hole opener 9 is divided into a welding section 901, an upper external thread section 902, a sealing section 903, a lower external thread section 904 and a hole cutter 905 in sequence from top to bottom, as shown in fig. 5.
The upper end port of the main pipe 601 is a welding hole 603 capable of being clamped with the welding section 901, and the inner wall of the welding hole 603 is annularly provided with a heating wire 604 for welding with the welding section 901. After the opening, the welding section 901 and the welding hole 603 can be welded and fixed by the heating wire 604, further ensuring that natural gas does not leak from the welding hole 603.
An external thread is arranged on the upper external thread section 902, and an upper internal thread section 605 which can be screwed with the upper external thread section 902 is arranged on the inner side of the welding hole 603. Through the screw-thread fit of the upper external thread section 902 and the upper internal thread section 605, the tapping cutter 905 can be positioned on the upper side of the pipe hole of the sleeve 8 after tapping is finished, and the tapping cutter can also be used for assisting the welding between the welding section 901 and the welding hole 603.
The sealing section 903 is in sliding sealing engagement with the inner wall of the sleeve 8. A plurality of O-shaped sealing rings 906 are annularly arranged on the sealing section 903, and the O-shaped sealing rings 906 are in sliding sealing fit with the inner wall of the sleeve 8.
The lower external thread section 904 is provided with external threads, and the lower part of the inner side of the sleeve 8 is provided with a lower internal thread section 606 which can be screwed with the lower external thread section 904. Through the screw-thread fit of outer screw thread section 904 and lower internal thread section 606 down for supplementary trompil sword 905 is trompil on sealed baffle 501 at, makes trompil sword 905 have bigger pushing down force when the trompil, prevents to lean on operating personnel to use the hand pushing down force inadequately, the problem that the trompil is arduous.
The tapping knife 905 is an annular knife head with a downward knife opening.
A driving rod positioning groove 907 is formed in the center of the top of the hole cutter 9, a handle 305 is arranged at the upper end of the driving rod 3, the driving rod 3 can be conveniently held by an operator through the handle 305, a polygonal starting head 301 which can be clamped with the driving rod positioning groove 907 is arranged at the lower end of the driving rod 3, the cross section of the driving rod positioning groove 907 is a regular hexagon, and the cross section of the polygonal starting head 301 is also a regular hexagon. The polygonal starting head 301 and the driving rod positioning groove 907 are connected through a clamping mechanism and cannot rotate relatively. The clamping mechanism between the polygonal starting head 301 and the driving rod positioning groove 907 is as follows: a ball slide way 302 is transversely arranged in the polygonal starting head 301, a ball 303 is arranged in the ball slide way 302, the ball 303 can slide along the ball slide way 302, the front side of the ball 303 extends out of the side wall of the polygonal starting head 301, and a compression spring 304 is arranged at the rear side; the inner wall of the driving rod positioning slot 907 is provided with a ball slot 908 capable of being clamped with the ball 303, as shown in fig. 2.
The outer wall of the lower end of the main pipe 601 is provided with a welding area, and the outer wall of one end of the branch pipe 602, which is not connected with the main pipe 601, is provided with a welding area.
One end of the bleeding valve 2 is connected with the other end of the branch pipe 602 through an electric melting pipe fitting 7.
When the diffusion device is required to be used for leading out the branch pipe, the diffusion valve 2 is firstly closed, the lower end of the driving rod 3 extends into the fusion hole 603 at the upper end of the main pipe 601, and the driving rod 3 and the hole opener 9 are fixed through clamping connection between the polygonal starting head 301 and the driving rod positioning groove 907. The drive rod 3 drives the hole opener 9 to move downwards to the lower side in the hole of the sleeve 8, so that the lower external thread section 904 on the hole opener 9 is in threaded fit with the lower internal thread section 606 on the lower portion inside the sleeve 8, and then the hole opener 9 is rotated, so that the hole cutter 905 on the lower side of the hole opener 9 moves downwards to open the hole while rotating. When the sealing diaphragm 501 is completely opened by the tapping knife 905, the tapping is completed, as shown in fig. 6. If the trompil in-process, have the piece to drop, the ash collecting barrel 4 of 5 lower extreme openings parts of accessible diffusing pipe collects again, and has seted up intercommunication mouth 402 on the ash collecting barrel 4 lateral wall, all is equipped with filter screen 403 on the intercommunication mouth 402, neither can influence the normal transportation of natural gas, can block again that the piece drops to the body 1 in, pollutes the pipeline.
After tapping is completed, the adapter 4 is not communicated with the branch pipe 602, and the tapping device 9 needs to be moved upwards and retracted. And reversely rotating the hole opener 9 to separate a lower external thread section 904 on the hole opener 9 from a lower internal thread section 606 at the lower part of the inner side of the sleeve 8, pulling the hole opener 9 upwards, wherein in the process of moving the hole opener 9 upwards, the hole opener 9 is firstly sealed with the sleeve 8 section positioned at the upper side of the notch 801, as shown in fig. 7, and then separated from the sleeve 8 section positioned at the lower side of the notch 801, and when the hole opener 9 is separated from the sleeve 8 section positioned at the lower side of the notch 801, the connecting pipe 4 is communicated with the branch pipe 602.
The hole opener 9 moves upwards continuously, when the upper external thread section 902 on the hole opener 9 contacts with the upper internal thread section 605 inside the welding hole 603, the hole opener 9 is rotated again, so that the upper external thread section 902 is screwed and fixed with the upper internal thread section 605, the driving rod 3 is removed, and at this time, the welding section 901 of the hole opener 9 is clamped in the welding hole 603 at the upper end of the main pipe 601. Finally, the electric melting welding device is used to electrify the heating wire 604 in the welding hole 603, so as to seal the welding section 901 of the hole opener 9 with the welding hole 603 at the upper end of the main pipe 601, as shown in fig. 8 and 9.
At this point, the operator can use the outgoing branch at the other end of the bleed valve 2.
Claims (5)
1. A natural gas line that can branch includes body (1) at least, its characterized in that:
the pipe body (1) is provided with a diffusing mechanism, and the diffusing mechanism at least comprises a diffusing pipe (5), an air outlet pipe (6), a diffusing valve (2) and a detachable driving rod (3);
the diffusing pipe (5) is erected on the outer wall of the pipe body (1) and is integrally formed with the pipe body (1), and the diffusing pipe (5) is communicated with the pipe hole of the pipe body (1); a sealing partition plate (501) used for sealing the pipe hole of the diffusing pipe (5) is transversely arranged in the diffusing pipe (5), and the sealing partition plate (501) and the inner wall of the diffusing pipe (5) are integrally formed;
an ash collecting barrel (4) is positioned at an opening at the lower end of a diffusing pipe (5) positioned in a pipe body (1), an ash collecting groove (401) is formed at the bottom of an inner cavity of the ash collecting barrel (4), a plurality of communicating ports (402) used for communicating pipe holes of the pipe body (1) and pipe holes of the diffusing pipe (5) are formed in the side wall of the ash collecting barrel (4), and filter screens (403) are arranged on the communicating ports (402);
the air outlet pipe (6) comprises a main pipe (601) and a branch pipe (602), the main pipe (601) is longitudinally arranged, the lower end of the main pipe (601) is connected with the upper end of the diffusing pipe (5) through an electric melting pipe fitting (7), the branch pipe (602) is transversely arranged, one end of the branch pipe (602) is connected and communicated with the pipe wall of the main pipe (601), a sleeve (8) is coaxially arranged in the main pipe (601), the outer wall of the sleeve (8) is fixedly attached to the inner wall of the main pipe (601), the inner wall of the sleeve (8) is smooth, a notch (801) communicated with the branch pipe (602) is formed in the pipe wall of the sleeve (8), a hole opener (9) capable of sliding up and down along the inner wall of the sleeve (8) is arranged in the sleeve (8), and the hole opener (9) is in sliding sealing fit with the inner;
a driving rod positioning groove (907) is formed in the center of the top of the hole opener (9), a polygonal starting head (301) capable of being clamped with the driving rod positioning groove (907) is arranged at the lower end of the driving rod (3), and the polygonal starting head (301) and the driving rod positioning groove (907) are connected through a clamping mechanism and cannot rotate relatively;
one end of the bleeding valve (2) is connected with the other end of the branch pipe (602) through an electric melting pipe fitting (7);
the hole digger (9) is sequentially divided into a welding section (901), an upper external thread section (902), a sealing section (903), a lower external thread section (904) and a hole digger (905) from top to bottom;
the port at the upper end of the main pipe (601) is a welding hole (603) which can be clamped with the welding section (901), and the inner wall of the welding hole (603) is annularly provided with an electric heating wire (604) which is used for welding with the welding section (901);
an external thread is arranged on the upper external thread section (902), and an upper internal thread section (605) which can be screwed with the upper external thread section (902) is arranged on the inner side of the fusion hole (603);
the sealing section (903) is in sliding sealing fit with the inner wall of the sleeve (8);
the lower external thread section (904) is provided with external threads, and the lower part of the inner side of the sleeve (8) is provided with a lower internal thread section (606) which can be screwed with the lower external thread section (904);
the hole opening knife (905) is an annular knife head with a downward knife opening.
2. A bifurcated natural gas conduit as recited in claim 1, wherein: the cross section of the driving rod positioning groove (907) is a regular hexagon, and the cross section of the polygonal starting head (301) is also a regular hexagon.
3. A bifurcated natural gas conduit as claimed in claim 1 or 2, wherein: the clamping mechanism between the polygonal starting head (301) and the driving rod positioning groove (907) is as follows: a ball slideway (302) is transversely arranged in the polygonal starting head (301), a ball (303) is arranged in the ball slideway (302), the ball (303) can slide along the ball slideway (302), the front side of the ball (303) extends out of the side wall of the polygonal starting head (301), and a compression spring (304) is arranged at the rear side; and a ball clamping groove (908) which can be clamped with the ball (303) is formed in the inner wall of the driving rod positioning groove (907).
4. A bifurcated natural gas conduit as recited in claim 1, wherein: a handle (305) is arranged at the upper end of the driving rod (3).
5. A bifurcated natural gas conduit as recited in claim 1, wherein: a plurality of O-shaped sealing rings (906) are annularly arranged on the sealing section (903), and the O-shaped sealing rings (906) are in sliding sealing fit with the inner wall of the sleeve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015896.3A CN109538843B (en) | 2019-01-08 | 2019-01-08 | Branching natural gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015896.3A CN109538843B (en) | 2019-01-08 | 2019-01-08 | Branching natural gas pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109538843A CN109538843A (en) | 2019-03-29 |
| CN109538843B true CN109538843B (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910015896.3A Active CN109538843B (en) | 2019-01-08 | 2019-01-08 | Branching natural gas pipeline |
Country Status (1)
| Country | Link |
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| CN (1) | CN109538843B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1201467A (en) * | 1966-12-06 | 1970-08-05 | Walter Slingsby & Co Ltd | Improvements in or relating to branch pipe fittings |
| CN202302530U (en) * | 2011-11-03 | 2012-07-04 | 科思茂(江苏)管业有限公司 | On-line electrofusion-jointing saddle-type bypass pipe joint for PE pipeline |
| CN204756273U (en) * | 2015-07-06 | 2015-11-11 | 宁波市宇华电器有限公司 | Polyethylene electric smelting bypass pipe fitting |
| JP2016217518A (en) * | 2015-05-26 | 2016-12-22 | 株式会社水道技術開発機構 | Branch structure of fluid pipe and method for applying covering cylinder for fluid pipe |
| CN107631050A (en) * | 2017-11-06 | 2018-01-26 | 赵桂凤 | A kind of valve |
| CN107883101A (en) * | 2017-11-06 | 2018-04-06 | 宁波市宇华电器有限公司 | A kind of electric smelting bypasses saddle type |
| CN108869781A (en) * | 2018-09-10 | 2018-11-23 | 赵桂凤 | A kind of natural gas valve |
| CN109027295A (en) * | 2018-09-10 | 2018-12-18 | 赵桂凤 | A kind of PE ball valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061397B (en) * | 2014-05-08 | 2016-06-08 | 浙江庆发管业科技有限公司 | Cloth silk electric smelting saddle type bypass after one |
-
2019
- 2019-01-08 CN CN201910015896.3A patent/CN109538843B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1201467A (en) * | 1966-12-06 | 1970-08-05 | Walter Slingsby & Co Ltd | Improvements in or relating to branch pipe fittings |
| CN202302530U (en) * | 2011-11-03 | 2012-07-04 | 科思茂(江苏)管业有限公司 | On-line electrofusion-jointing saddle-type bypass pipe joint for PE pipeline |
| JP2016217518A (en) * | 2015-05-26 | 2016-12-22 | 株式会社水道技術開発機構 | Branch structure of fluid pipe and method for applying covering cylinder for fluid pipe |
| CN204756273U (en) * | 2015-07-06 | 2015-11-11 | 宁波市宇华电器有限公司 | Polyethylene electric smelting bypass pipe fitting |
| CN107631050A (en) * | 2017-11-06 | 2018-01-26 | 赵桂凤 | A kind of valve |
| CN107883101A (en) * | 2017-11-06 | 2018-04-06 | 宁波市宇华电器有限公司 | A kind of electric smelting bypasses saddle type |
| CN108869781A (en) * | 2018-09-10 | 2018-11-23 | 赵桂凤 | A kind of natural gas valve |
| CN109027295A (en) * | 2018-09-10 | 2018-12-18 | 赵桂凤 | A kind of PE ball valve |
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| Publication number | Publication date |
|---|---|
| CN109538843A (en) | 2019-03-29 |
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Denomination of invention: A Branchable Natural Gas Pipeline Effective date of registration: 20230803 Granted publication date: 20201225 Pledgee: Industrial and Commercial Bank of China Limited Zhongxiang Sub-branch Pledgor: HUBEI ZHONGGE PLASTIC PIPE Co.,Ltd. Registration number: Y2023980050620 |
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