CN108716583B - A pipe fitting for natural gas transportation - Google Patents
A pipe fitting for natural gas transportation Download PDFInfo
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- CN108716583B CN108716583B CN201810889157.2A CN201810889157A CN108716583B CN 108716583 B CN108716583 B CN 108716583B CN 201810889157 A CN201810889157 A CN 201810889157A CN 108716583 B CN108716583 B CN 108716583B
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- pipe
- ash
- wall
- sealing
- collecting hole
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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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/24—Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Refuse Collection And Transfer (AREA)
Abstract
The invention discloses a pipe fitting for natural gas transportation, which relates to the technical field of pipe fittings and at least comprises a pipe body, wherein an ash collecting hole is formed in the pipe body in a way of penetrating through the wall of an inner pipe and an outer pipe, a detachable sealing cover matched with the ash collecting hole in a sealing way is arranged on the outer side of the ash collecting hole, a guide convex ring is circumferentially arranged on the inner wall of the pipe body, the guide convex ring is positioned on one side of an opening in the pipe of the ash collecting hole, and an annular guide groove is formed in the side wall of one side, facing the ash collecting hole, of the. The invention provides a pipe fitting for natural gas transportation, which can collect and clean dust particles in a pipe and reduce the leakage risk of a pipe valve, and aims to solve the problem that the pipe valve is leaked due to the fact that the dust particles in an existing natural gas pipe network are easy to scratch the inner wall of the pipe valve.
Description
Technical Field
The invention relates to the technical field of pipe fittings, in particular to a pipe fitting which is used for natural gas transportation and can collect dust particles in a pipe.
Background
The pipe herein mainly refers to PE pipe, i.e. polyethylene pipe. In a natural gas pipe network, a metal pipe valve is gradually replaced by a PE pipe valve, and the PE pipe valve has the advantages of light weight, corrosion resistance, long service life, convenience in installation and maintenance and the like. However, the PE pipe valve is made of plastic, and is not scratch-resistant, and during installation and operation of a natural gas pipe network, dust particles are inevitably introduced into an inner cavity of the pipe valve, if the natural gas pipe network is not cleaned in time, the inner wall of the pipe valve, especially the PE ball valve, is scratched, and if the outer wall of the valve core is scratched by the dust particles, the leakage of the ball valve is easily caused after a long time, and a serious person may cause immeasurable loss to people.
Disclosure of Invention
The invention provides a pipe fitting for natural gas transportation, which can collect and clean dust particles in a pipe and reduce the leakage risk of a pipe valve, and aims to solve the problem that the pipe valve is leaked due to the fact that the dust particles in an existing natural gas pipe network are easy to scratch the inner wall of the pipe valve.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a pipe fitting for natural gas transportation, includes the body at least, run through inside and outside pipe wall on the body and be equipped with an album ash hole, the collection ash hole outside be equipped with a detachable and with the sealed lid of the sealed complex in album ash hole, circumference ring is equipped with a direction bulge loop on the body inner wall, and the direction bulge loop is located the intraductal opening one side in album ash hole, is equipped with annular guide way on the lateral wall of one side of going to album ash hole on the direction bulge loop.
Preferably, an annular boss is arranged on the outer edge of the dust collecting hole on the outer wall of the pipe body, the annular boss and the pipe body are integrally formed, and external threads of the sealing cover are annularly arranged on the outer wall of the annular boss; the sealing cover comprises a cover body and an annular cover wall standing on the cover body, and sealing cover internal threads matched with the sealing cover external threads are annularly arranged on the inner wall of the annular cover wall; the cover body is provided with a plurality of ash collecting hole sealing rings which can realize sealing with the top surface of the annular boss, and the ash collecting hole sealing rings are positioned on the bottom surface of the cover body on the inner side of the annular cover wall.
Preferably, the dust collection hole sealing ring is an O-shaped sealing ring.
Preferably, an ash collecting mechanism is arranged in the ash collecting hole and comprises an inner nested pipe and a lifting ash collector, the inner nested pipe is embedded in the ash collecting hole, the outer wall of the inner nested pipe is in sealing fit with the inner wall of the ash collecting hole of the sleeve, the central axis of the inner nested pipe is intersected with and perpendicular to the central axis of the pipe body, the inner hole of the inner nested pipe is sequentially divided into an upper smooth section, an inner thread section and a lower smooth section from inside to outside, the central axes of the upper smooth section, the inner thread section and the lower smooth section are all overlapped, and the diameters of the upper smooth section and the lower smooth section are all larger than the diameter of the inner thread section; the lifting ash collector comprises an ash storage pipe, an upper sealing plate and a lower sealing plate, wherein the upper sealing plate can be in sliding seal with the upper smooth section, the lower sealing plate can be in sliding seal with the lower smooth section, the outer wall of the ash storage pipe is provided with an external thread matched with the internal thread section of the inner nested pipe, the ash storage pipe is screwed with the internal thread section of the inner nested pipe, the upper end of the ash storage pipe is fixed with the upper sealing plate, the lower end of the ash storage pipe is fixed with the lower sealing plate, and the central axes of the upper sealing plate, the ash storage pipe and the lower sealing; when the upper sealing plate is separated from the upper smooth section, the lower sealing plate is sealed with the lower smooth section; when the lower sealing plate is separated from the lower smooth section, the upper sealing plate and the upper smooth section are sealed; the pipe cavity of ash storage pipe is ash storage cavity, is equipped with on the ash storage pipe and communicates to ash storage cavity's ash inlet and air outlet, ash inlet and air outlet set up relatively, are equipped with the filter screen on the air outlet.
Preferably, a plurality of upper sealing rings which can be in sliding seal with the upper smooth section are circumferentially and annularly arranged on the side wall of the upper sealing plate, and the upper sealing rings and the upper sealing plate are fixed in a sealing manner; the side wall of the lower sealing plate is circumferentially provided with a plurality of lower sealing rings which can be in sliding sealing with the lower smooth section, and the lower sealing rings and the lower sealing plate are fixed in a sealing manner.
Preferably, the bottom of the lower sealing plate is provided with an inner hexagonal groove which can be matched with an inner hexagonal wrench.
Preferably, the outer wall of the inner nested pipe is provided with a rotation stopping rib for reinforcing the positioning between the inner nested pipe and the ash collecting hole.
therefore, the invention has the following beneficial effects: 1. dust particles on the inner wall of the pipe fitting can be collected and cleaned, and the inner wall of the pipe valve is prevented from being scratched to cause leakage of a pipe network; 2. the inner wall of the pipe body is provided with the guide convex ring and the annular guide groove, so that dust particles in the pipe body can be collected more intensively and temporarily stored in the dust collecting hole, and the cleaning in the pipe is more thorough; 3. the dust particles can be taken out in the use process of the pipe network, the pipe network does not need to be suspended, and the economic loss is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the first embodiment.
Fig. 2 is a side view of the first embodiment.
Fig. 3 is a sectional view taken in the direction of a-a in fig. 2.
Fig. 4 is a sectional view taken in the direction B-B in fig. 2.
Fig. 5 is an enlarged schematic view at a in fig. 4.
FIG. 6 is a schematic view showing the structure of the dust collecting hole in the present invention.
Fig. 7 is a schematic view of the structure of the sealing cap of the present invention.
FIG. 8 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 9 is an enlarged schematic view at b in fig. 8.
FIG. 10 is a schematic structural view of the inner nested tube of the second embodiment.
FIG. 11 is a cross-sectional view of the inner nested tube of the second embodiment.
FIG. 12 is a schematic structural view of the lifting dust collector in the second embodiment.
FIG. 13 is a schematic view of the lifting ash collector in another angle according to the second embodiment.
FIG. 14 is a front view of the lifting dust collector in the second embodiment.
FIG. 15 is a schematic view of the ash removal structure of the second embodiment.
1: a pipe body; 101: ash collecting holes; 102: an annular boss; 103: external threads of the sealing cover; 2: a sealing cover; 201: a cover body; 202: an annular cover wall; 203: a dust collecting hole sealing ring; 204: sealing cover internal threads; 3: a guide convex ring; 301: an annular guide groove; 4: nesting a pipe; 401: an upper smooth section; 402: an internal thread section; 403: a lower smooth section; 404: stopping rotating the ribs; 5: lifting the ash collector; 501: an upper sealing plate; 502: an ash storage pipe; 503: a lower sealing plate; 504: a dust storage cavity; 505: an ash inlet; 506: an air outlet; 507: an upper sealing ring; 508: a lower seal ring; 509: a filter screen; 510: and an inner hexagonal groove.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
The first embodiment is as follows: see fig. 1-7
The utility model provides a pipe fitting for natural gas transportation, includes body 1 at least, it is equipped with an album ash hole 101 to run through inside and outside pipe wall on body 1, and the sealed lid 2 that is equipped with a detachable and seals the complex with album ash hole 101 outside album ash hole 101. An annular boss 102 is arranged on the outer edge of the dust collecting hole 101 in the outer wall of the pipe body 1, the annular boss 102 and the pipe body 1 are integrally formed, and a sealing cover external thread 103 is annularly arranged on the outer wall of the annular boss 102. The sealing cover 2 comprises a cover body 201 and an annular cover wall 202 standing on the cover body 201, and sealing cover internal threads 204 matched with the sealing cover external threads 103 are annularly arranged on the inner wall of the annular cover wall 202; an ash collecting hole sealing ring 203 which can realize sealing with the top surface of the annular boss 102 is positioned on the cover body 201, the ash collecting hole sealing ring 203 is an O-shaped sealing ring, and the ash collecting hole sealing ring 203 is positioned on the bottom surface of the cover body 201 on the inner side of the annular cover wall 202. The inner wall of the pipe body 1 is circumferentially and annularly provided with a guide convex ring 3, the guide convex ring 3 is positioned on one side of the inner opening of the dust collecting hole 101, and the side wall of one side, facing the dust collecting hole 101, of the guide convex ring 3 is provided with an annular guide groove 301.
When the installation is used, the pipe body 1 is transversely installed, the ash collecting mechanism is located at the lowest end of the pipe body 1, the annular guide groove 301 is arranged opposite to the natural gas transportation direction, the sealing cover 2 is screwed and fixed on the annular boss 102, and the ash collecting hole sealing ring 203 of the sealing cover 2 is in sealing fit with the top surface of the annular boss 102.
Because the density of dust particle is higher for the density of natural gas, the natural gas is at 1 inner chamber transportation flow in-process of body, and the dust particle often can be driven by the air current of natural gas and paste 1 inner wall of body and remove, contacts when dust particle and annular boss 102, then can be restricted in annular guide way 301 to receive self action of gravity, slide and drop, keep in to album grey hole 101 toward the collection grey hole 101 direction of bottom.
When dust particles need to be removed, an operator needs to cut off the natural gas pipeline, so that the natural gas in the pipeline is temporarily stopped for transportation, and then the sealing cover 2 is rotated to be removed for cleaning.
Example two: see fig. 1-15
The utility model provides a pipe fitting for natural gas transportation, includes body 1 at least, it is equipped with an album ash hole 101 to run through inside and outside pipe wall on body 1, and the sealed lid 2 that is equipped with a detachable and seals the complex with album ash hole 101 outside album ash hole 101. An annular boss 102 is arranged on the outer edge of the dust collecting hole 101 in the outer wall of the pipe body 1, the annular boss 102 and the pipe body 1 are integrally formed, and a sealing cover external thread 103 is annularly arranged on the outer wall of the annular boss 102. The sealing cover 2 comprises a cover body 201 and an annular cover wall 202 standing on the cover body 201, and sealing cover internal threads 204 matched with the sealing cover external threads 103 are annularly arranged on the inner wall of the annular cover wall 202; an ash collecting hole sealing ring 203 which can realize sealing with the top surface of the annular boss 102 is positioned on the cover body 201, the ash collecting hole sealing ring 203 is an O-shaped sealing ring, and the ash collecting hole sealing ring 203 is positioned on the bottom surface of the cover body 201 on the inner side of the annular cover wall 202. The inner wall of the pipe body 1 is circumferentially and annularly provided with a guide convex ring 3, the guide convex ring 3 is positioned on one side of the inner opening of the dust collecting hole 101, and the side wall of one side, facing the dust collecting hole 101, of the guide convex ring 3 is provided with an annular guide groove 301.
The ash collecting hole 101 is internally provided with an ash collecting mechanism, the ash collecting mechanism comprises an inner nested pipe 4 and a lifting ash collector 5, the inner nested pipe 4 is embedded in the ash collecting hole 101, a rotation stopping rib 404 used for reinforcing and positioning between the ash collecting hole 101 is arranged on the outer wall of the inner nested pipe 4, the outer wall of the inner nested pipe 4 is in sealing fit with the inner wall of the sleeve ash collecting hole 101, the central axis of the inner nested pipe 4 is intersected and perpendicular with the central axis of the pipe body 1, the inner hole of the inner nested pipe 4 is sequentially divided into an upper smooth section 401, an inner threaded section 402 and a lower smooth section 403 from inside to outside, the central axes of the upper smooth section 401, the inner threaded section 402 and the lower smooth section 403 are all overlapped, and the diameters of the upper smooth section 401 and the lower smooth section 403 are all larger than the diameter of the inner threaded section 402. The opening of the upper smooth section 401 of the inner nested tube 4 is provided with a chamfer, and the opening of the lower smooth section 403 is provided with a chamfer.
The lifting ash collector 5 comprises an ash storage pipe 502, an upper sealing plate 501 capable of being in sliding seal with the upper smooth section 401 and a lower sealing plate 503 capable of being in sliding seal with the lower smooth section 403, the upper sealing plate 501 and the lower sealing plate 503 are both cylindrical, an external thread matched with the internal thread section 402 of the inner nested pipe 4 is arranged on the outer wall of the ash storage pipe 502, the ash storage pipe 502 is screwed with the internal thread section 402 of the inner nested pipe 4, the upper end of the ash storage pipe 502 is fixed with the upper sealing plate 501, the lower end of the ash storage pipe 502 is fixed with the lower sealing plate 503, and the central axes of the upper sealing plate 501, the ash storage pipe 502 and the lower sealing plate 503 are all overlapped. An upper sealing ring 507 capable of sliding and sealing with the upper sliding section 401 is circumferentially and annularly arranged on the side wall of the upper sealing plate 501, and the upper sealing ring 507 and the upper sealing plate 501 are fixed in a sealing manner; two lower sealing rings 508 capable of sliding and sealing with the lower smooth section 403 are circumferentially arranged on the side wall of the lower sealing plate 503, and the lower sealing rings 508 and the lower sealing plate 503 are fixed in a sealing manner. When the upper sealing plate 501 is separated from the upper smooth section 401, the lower sealing plate 503 is sealed with the lower smooth section 403; when lower sealing plate 503 disengages from lower smooth section 403, upper sealing plate 501 seals with upper smooth section 401. The bottom of the lower sealing plate 503 is provided with an inner hexagonal groove 510 which can be matched with an inner hexagonal wrench.
The pipe cavity of the ash storage pipe 502 is an ash storage cavity 504, an ash inlet 505 and an air outlet 506 communicated with the ash storage cavity 504 are arranged on the ash storage pipe 502, and the ash inlet 505 and the air outlet 506 are oppositely arranged. A filter screen 509 is arranged on the air outlet 506.
During the installation use, body 1 transversely installs, the ash collecting mechanism is located the least significant end of body 1, annular guide way 301 sets up with natural gas transportation's direction relatively, use through the cooperation of allen key and hexagon socket head cap groove 510, rotatory lift ash collector 5, through the screw-thread fit between the internal thread section 402 of ash storage pipe 502 and interior nested pipe 4, rise upper seal plate 501 to body 1 inner chamber, and break away from with the last smooth section 401 of interior nested pipe 4, the orientation of entering ash mouth 505 is relative with natural gas transportation's direction, at this moment, lower seal plate 503 and the sealed cooperation of the lower smooth section 403 of interior nested pipe 4. And then the sealing cover 2 is fixed on the annular boss 102, and the ash collecting hole sealing ring 203 of the sealing cover 2 is in sealing fit with the top surface of the annular boss 102, so that the inside of the inner nested pipe 4 is sealed for the second time, and the natural gas in the pipe body 1 is ensured not to leak from the inner nested pipe 4.
Because the density of dust particle is higher for the density of natural gas, the natural gas is in the transportation flow in-process of body 1 inner chamber, the dust particle often can be driven by the air current of natural gas and paste body 1 inner wall and remove, when the dust particle contacts with annular boss 102, then can be restricted in annular guide way 301, and receive self action of gravity, slip towards the collection grey hole 101 direction of bottom, finally get into in the ash storage chamber 504 from the ash inlet 505 department of lift ash collector 5, the natural gas can be followed air outlet 506 and is located the discharge and continue to move, and the dust particle is then depositd in ash storage chamber 504 bottom or is kept apart on filter screen 509.
When dust particles need to be removed, the sealing cover 2 is rotated and taken down, an inner hexagonal wrench is used in cooperation with the inner hexagonal groove 510, the ash collector 5 rotates reversely, the upper sealing plate 501 rotates and falls into the upper smooth section 401 of the inner nested pipe 4 and is sealed with the inner wall of the upper smooth section 401, the lower sealing plate 503 rotates and moves out of the lower smooth section 403 of the inner nested pipe 4, after the lower sealing plate 503 is separated from the lower smooth section 403, the lower sealing plate continues to move downwards until the ash inlet 505 also partially extends out of the outer side of the lower smooth section 403 of the inner nested pipe 4, as shown in fig. 15, at the moment, an operator only needs to take out the dust particles to be cleaned from the ash storage cavity 504 through the exposed ash inlet 505, and the dust particles can be cleaned without cutting off a natural gas pipeline.
Claims (6)
1. A pipe fitting for natural gas transportation, at least comprising a pipe body (1), characterized in that: an ash collecting hole (101) penetrates through the inner and outer pipe walls of the pipe body (1), a detachable sealing cover (2) which is in sealing fit with the ash collecting hole (101) is arranged on the outer side of the ash collecting hole (101), a guide convex ring (3) is circumferentially arranged on the inner wall of the pipe body (1) in a surrounding manner, the guide convex ring (3) is positioned on one side of an opening in the pipe of the ash collecting hole (101), and an annular guide groove (301) is formed in the side wall of one side, facing the ash collecting hole (101), of the guide convex ring (3);
The ash collecting device is characterized in that an ash collecting mechanism is arranged in the ash collecting hole (101), the ash collecting mechanism comprises an inner nested pipe (4) and a lifting ash collector (5), the inner nested pipe (4) is embedded in the ash collecting hole (101), the outer wall of the inner nested pipe (4) is in sealing fit with the inner wall of the sleeve ash collecting hole (101), the central axis of the inner nested pipe (4) is intersected and perpendicular to the central axis of the pipe body (1), the inner hole of the inner nested pipe (4) is sequentially divided into an upper smooth section (401), an inner threaded section (402) and a lower smooth section (403) from inside to outside, the central axes of the upper smooth section (401), the inner threaded section (402) and the lower smooth section (403) are all overlapped, and the diameters of the upper smooth section (401) and the lower smooth section (403) are all larger than the diameter of the inner threaded section (402); the lifting ash collector (5) comprises an ash storage pipe (502), an upper sealing plate (501) capable of being in sliding seal with the upper smooth section (401) and a lower sealing plate (503) capable of being in sliding seal with the lower smooth section (403), wherein an external thread matched with the internal thread section (402) of the internally nested pipe (4) is arranged on the outer wall of the ash storage pipe (502), the ash storage pipe (502) is screwed with the internal thread section (402) of the internally nested pipe (4), the upper end of the ash storage pipe (502) is fixed with the upper sealing plate (501), the lower end of the ash storage pipe is fixed with the lower sealing plate (503), and the central axes of the upper sealing plate (501), the ash storage pipe (502) and the lower sealing plate (503) are all overlapped; when the upper sealing plate (501) is separated from the upper smooth section (401), the lower sealing plate (503) is sealed with the lower smooth section (403); when the lower sealing plate (503) is separated from the lower smooth section (403), the upper sealing plate (501) is sealed with the upper smooth section (401); the pipe cavity of the ash storage pipe (502) is an ash storage cavity (504), an ash inlet (505) and an air outlet (506) communicated to the ash storage cavity (504) are formed in the ash storage pipe (502), the ash inlet (505) and the air outlet (506) are oppositely arranged, and a filter screen (509) is arranged on the air outlet (506).
2. A pipe for natural gas transportation according to claim 1, wherein: an annular boss (102) is arranged on the outer edge of the ash collecting hole (101) positioned on the outer wall of the pipe body (1), the annular boss (102) and the pipe body (1) are integrally formed, and a sealing cover external thread (103) is annularly arranged on the outer wall of the annular boss (102); the sealing cover (2) comprises a cover body (201) and an annular cover wall (202) standing on the cover body (201), wherein sealing cover internal threads (204) matched with the sealing cover external threads (103) are annularly arranged on the inner wall of the annular cover wall (202); a plurality of ash collecting hole sealing rings (203) capable of sealing with the top surface of the annular boss (102) are positioned on the cover body (201), and the ash collecting hole sealing rings (203) are positioned on the bottom surface of the cover body (201) on the inner side of the annular cover wall (202).
3. A pipe for natural gas transportation according to claim 1, wherein: the ash collecting hole sealing ring (203) is an O-shaped sealing ring.
4. A pipe for natural gas transportation according to claim 1, wherein: a plurality of upper sealing rings (507) which can be in sliding seal with the upper sliding section (401) are circumferentially arranged on the side wall of the upper sealing plate (501) in a surrounding mode, and the upper sealing rings (507) and the upper sealing plate (501) are fixed in a sealing mode; the side wall of the lower sealing plate (503) is circumferentially provided with a plurality of lower sealing rings (508) which can be in sliding sealing with the lower smooth section (403), and the lower sealing rings (508) and the lower sealing plate (503) are fixed in a sealing way.
5. A pipe for natural gas transportation according to claim 1, wherein: the bottom of the lower sealing plate (503) is provided with an inner hexagonal groove (510) which can be matched with an inner hexagonal wrench.
6. A pipe for natural gas transportation according to claim 1, wherein: and the outer wall of the inner nested pipe (4) is provided with a rotation stopping rib (404) for reinforcing and positioning the inner nested pipe and the ash collecting hole (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810889157.2A CN108716583B (en) | 2018-08-07 | 2018-08-07 | A pipe fitting for natural gas transportation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810889157.2A CN108716583B (en) | 2018-08-07 | 2018-08-07 | A pipe fitting for natural gas transportation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108716583A CN108716583A (en) | 2018-10-30 |
| CN108716583B true CN108716583B (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810889157.2A Active CN108716583B (en) | 2018-08-07 | 2018-08-07 | A pipe fitting for natural gas transportation |
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| CN (1) | CN108716583B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203868597U (en) * | 2014-05-28 | 2014-10-08 | 天津海科信达石油技术有限公司 | Sundry catcher of ash conveying system for drilling platform |
| CN105371050A (en) * | 2014-08-14 | 2016-03-02 | 无锡市兴麟染整环保有限公司 | Dust collection structure for smoke dust pipeline |
| CN205013881U (en) * | 2015-09-09 | 2016-02-03 | 浙江中五钢管制造有限公司 | Can have a X -rayed stainless steel pipe |
| CN205446748U (en) * | 2016-03-24 | 2016-08-10 | 周秀君 | Dust collector's stopper formula unloading valve |
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2018
- 2018-08-07 CN CN201810889157.2A patent/CN108716583B/en active Active
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| CN108716583A (en) | 2018-10-30 |
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Effective date of registration: 20191106 Address after: 317600 Baiyan, Yucheng Street, Yuhuan City, Taizhou City, Zhejiang Province Applicant after: Zhejiang Water Resources Technology Co., Ltd. Address before: 310003 Room 202, Unit 5, 8 Yanzhi New Village, Xiacheng District, Hangzhou City, Zhejiang Province Applicant before: Zhao Guifeng |
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