CN113566042A - PP double-wall corrugated pipe for municipal sewage disposal - Google Patents
PP double-wall corrugated pipe for municipal sewage disposal Download PDFInfo
- Publication number
- CN113566042A CN113566042A CN202110660311.0A CN202110660311A CN113566042A CN 113566042 A CN113566042 A CN 113566042A CN 202110660311 A CN202110660311 A CN 202110660311A CN 113566042 A CN113566042 A CN 113566042A
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- CN
- China
- Prior art keywords
- flange
- corrugated pipe
- bellows
- double
- municipal sewage
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- 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.)
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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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/027—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with external reinforcement
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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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
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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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/12—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with additional locking means
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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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/024—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube non-metallic
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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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/028—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with the expansion or contraction of each corrugation being limited
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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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/03—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube comprising two or more bellows
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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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention discloses a PP double-wall corrugated pipe for municipal sewage disposal, which comprises a first corrugated pipe, a second flange, a second corrugated pipe and a third flange, wherein one end of the second flange is connected with the first corrugated pipe, one end of the first corrugated pipe is provided with the second corrugated pipe, one side of the second corrugated pipe is connected with the third flange, the outer parts of the first corrugated pipe and the second corrugated pipe are provided with upper clamping rings, the bottom of the upper clamping ring is connected with a lower clamping ring, the outer parts of the upper clamping ring and the lower clamping ring are movably provided with mounting bolts, and the four mounting bolts are arranged on the upper clamping ring and the lower clamping ring. The damage of the corrugated pipe is prevented.
Description
Technical Field
The invention relates to the technical field of corrugated pipes, in particular to a PP double-wall corrugated pipe for municipal sewage disposal.
Background
Double-walled bellows is a novel tubular product with annular structure outer wall and smooth inner wall, and double-walled bellows inner wall colour has blue and black usually, and double-walled bellows's whole shape generally is circular, need use the bellows to municipal blowdown, however, current PP double-walled bellows that is used for municipal blowdown has many problems or defects:
firstly, the existing PP double-wall corrugated pipe for municipal sewage discharge has no reinforcing structure and is not strong in practicability;
secondly, the existing PP double-wall corrugated pipe for municipal sewage disposal is inconvenient to connect and not strong in practicability;
third, the existing PP double-wall corrugated pipe for municipal sewage can be expanded by the surrounding environment when in use, which easily causes the damage of the corrugated pipe.
Disclosure of Invention
The invention aims to provide a PP double-wall corrugated pipe for municipal sewage discharge to solve the problems of no reinforcing structure, inconvenient connection, easy influence of surrounding environment and easy damage in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a PP double-walled bellows for municipal administration blowdown, includes first bellows, second flange, second bellows and third flange, the one end of second flange is connected with first bellows, the second bellows has been placed to the one end of first bellows, and one side of second bellows is connected with the third flange, the outside of first bellows and second bellows is provided with the clamp ring, and the bottom of going up the clamp ring is connected with down the clamp ring, the outside activity of going up clamp ring and clamp ring down is provided with mounting bolt, and mounting bolt is provided with four on last clamp ring and clamp ring down, mounting bolt's outside is provided with the third nut through the screw thread activity.
Preferably, a sealing ring is arranged between the upper clamping ring and the lower clamping ring, one end of the first corrugated pipe and one end of the second corrugated pipe are clamped inside the sealing ring, and the sealing ring achieves the purpose of sealing.
Preferably, a first flange is placed on one side of the third flange, a first expansion pipe is connected to the right side of the first flange, and the first expansion pipe achieves the purpose of convenient expansion.
Preferably, one end of the first expansion pipe is connected with a fixing flange, the other end of the fixing flange is connected with a second expansion pipe, and the fixing flange achieves the purpose of fixing.
Preferably, one end of the second expansion pipe is connected with a first flange, the fixed flange, the first flange, the second flange and the third flange are provided with four second holes, the second holes are symmetrical about the center, and the flanges achieve the purpose of connection.
Preferably, the fixed flange, the first flange, the second flange and the third flange are provided with eight first holes, and the first holes are formed in the fixed flange, the first flange, the second flange and the third flange respectively, so that the flanges achieve the purpose of connection.
Preferably, a sliding rod is inserted into the second hole, first nuts are arranged at two ends of the sliding rod, the third flange and the first flange are fixed mutually through the first nuts, and the sliding rod achieves the purpose of facilitating sliding.
Preferably, a fixing rod is inserted into the first hole, second nuts are arranged at two ends of the fixing rod through threads, and the fixing rod achieves the purpose of fixing.
Preferably, the center position of the sliding rod is in mutual contact with the fixing flange, the fixing flange is fixed on the sliding rod through the first nut, and the sliding rod achieves the purpose of convenient sliding.
Compared with the prior art, the invention has the beneficial effects that: this a PP double-walled bellows for municipal administration blowdown is rational in infrastructure, has following advantage:
(1) through being provided with the dead lever, the second nut, the second flange, the purpose of the intensity of strengthening the bellows has been realized to third flange and first hole, current device intensity is not high, lead to the bellows when using easily, lead to the damage, therefore, during the use, through being provided with first hole on second flange and the third flange, the dead lever passes first hole and is connected with the second nut, thereby it is fixed with the dead lever on the surface of first bellows, thereby the dead lever is inside the bellows protection, thereby the purpose of the intensity of strengthening the bellows, prevent the bellows damage.
(2) The purpose of convenient connection is realized through being provided with clamp ring, mounting bolt, clamp ring, third nut and sealing washer down, and current bellows connection is inconvenient, consequently, during the use, mutually support last clamp ring and clamp ring down, then it has the sealing washer to fill in the inside of last clamp ring and clamp ring down, then inserts the bellows in last clamp ring and clamp ring down, then through rotating mounting bolt, makes last clamp ring and clamp ring reciprocal anchorage, has realized the purpose of convenient connection.
(3) Through being provided with first nut, mounting flange, first flange, the purpose that prevents the bellows damage has been realized to first expansion pipe and slide bar, current device can lead to bellows expend with heat and contract with cold when using, consequently, be provided with first expansion pipe and second expansion pipe in one side of bellows, first expansion pipe and second expansion pipe all have elasticity, when the bellows received flexible, the bellows just can make first expansion pipe and second expansion pipe compression, thereby make the bellows have certain flexible volume, thereby prevent the bellows damage.
Drawings
FIG. 1 is a front view of the exterior structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic side view of a portion of the present invention;
FIG. 4 is a partial internal schematic view of the present invention;
FIG. 5 is a side view of the clamp ring of the present invention.
In the figure: 1. a first nut; 2. a fixed flange; 3. a first flange; 4. an upper clamping ring; 5. fixing the rod; 6. a first bellows; 7. a second nut; 8. a second flange; 9. installing a bolt; 10. a lower clamping ring; 11. a third nut; 12. a second bellows; 13. a third flange; 14. a first expansion tube; 15. a slide bar; 16. a second expansion tube; 17. a first hole; 18. a second hole; 19. and (5) sealing rings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-5, an embodiment of the present invention is shown: a PP double-wall corrugated pipe for municipal sewage disposal comprises a first corrugated pipe 6, a second flange 8, a second corrugated pipe 12 and a third flange 13, wherein one end of the second flange 8 is connected with the first corrugated pipe 6, the second corrugated pipe 12 is placed at one end of the first corrugated pipe 6, one side of the second corrugated pipe 12 is connected with the third flange 13, an upper clamping ring 4 is arranged outside the first corrugated pipe 6 and the second corrugated pipe 12, a lower clamping ring 10 is connected to the bottom of the upper clamping ring 4, mounting bolts 9 are movably arranged outside the upper clamping ring 4 and the lower clamping ring 10, four mounting bolts 9 are arranged on the upper clamping ring 4 and the lower clamping ring 10, and a third nut 11 is movably arranged outside the mounting bolts 9 through threads;
a sealing ring 19 is arranged between the upper clamping ring 4 and the lower clamping ring 10, and one ends of the first corrugated pipe 6 and the second corrugated pipe 12 are clamped inside the sealing ring 19;
when the corrugated pipe clamping device is used, the upper clamping ring 4 and the lower clamping ring 10 are matched with each other, then the sealing rings 19 are filled in the upper clamping ring 4 and the lower clamping ring 10, then the corrugated pipe is inserted into the upper clamping ring 4 and the lower clamping ring 10, and then the upper clamping ring 4 and the lower clamping ring 10 are fixed with each other by rotating the mounting bolts 9, so that the purpose of convenient connection is realized;
a first flange 3 is arranged on one side of the third flange 13, and a first expansion pipe 14 is connected to the right side of the first flange 3;
one end of the first expansion pipe 14 is connected with a fixed flange 2, and the other end of the fixed flange 2 is connected with a second expansion pipe 16;
one end of the second expansion pipe 16 is connected with a first flange 3, the fixed flange 2, the first flange 3, the second flange 8 and the third flange 13 are provided with four second holes 18, and the second holes 18 are symmetrical about the center;
the fixed flange 2, the first flange 3, the second flange 8 and the third flange 13 are provided with eight first holes 17, and the first holes 17 are respectively arranged on the fixed flange 2, the first flange 3, the second flange 8 and the third flange 13;
a sliding rod 15 is inserted into the second hole 18, first nuts 1 are arranged at two ends of the sliding rod 15, and the third flange 13 and the first flange 3 are fixed with each other by the first nuts 1;
a first expansion pipe 14 and a second expansion pipe 16 are arranged on one side of the corrugated pipe, the first expansion pipe 14 and the second expansion pipe 16 both have elasticity, when the corrugated pipe is stretched, the corrugated pipe can enable the first expansion pipe 14 and the second expansion pipe 16 to be compressed, so that the corrugated pipe has a certain stretching amount, and the damage of the corrugated pipe is prevented;
a fixing rod 5 is inserted into the first hole 17, and second nuts 7 are arranged at two ends of the fixing rod 5 through threads;
the center position of the sliding rod 15 is contacted with the fixed flange 2, and the fixed flange 2 is fixed on the sliding rod 15 by the first nut 1;
during the use, through being provided with first hole 17 on second flange 8 and the third flange 13, dead lever 5 passes first hole 17 and is connected with second nut 7 to fixed with dead lever 5 on the surface of first bellows 6, thereby dead lever 5 protects the bellows inside, thereby the purpose of the intensity of reinforcing bellows prevents that the bellows from damaging.
The working principle is as follows: when in use, the first hole 17 is arranged on the second flange 8 and the third flange 13, the fixing rod 5 passes through the first hole 17 and is connected with the second nut 7, so that the surface of the first corrugated pipe 6 is fixed by the fixing rod 5, the corrugated pipe is protected inside by the fixing rod 5, the strength of the corrugated pipe is enhanced, the corrugated pipe is prevented from being damaged, the upper clamping ring 4 and the lower clamping ring 10 are matched with each other, then the sealing rings 19 are filled inside the upper clamping ring 4 and the lower clamping ring 10, then the corrugated pipe is inserted into the upper clamping ring 4 and the lower clamping ring 10, then the upper clamping ring 4 and the lower clamping ring 10 are fixed with each other by rotating the mounting bolts 9, the purpose of convenient connection is realized, the corrugated pipe is buried in a proper position for work, the first expansion pipe 14 and the second expansion pipe 16 are arranged on one side of the corrugated pipe, and both the first expansion pipe 14 and the second expansion pipe 16 have elasticity, when the bellows is expanded and contracted, the bellows compresses the first expansion pipe 14 and the second expansion pipe 16, thereby allowing the bellows to have a certain expansion amount, thereby preventing the bellows from being damaged.
Claims (9)
1. The utility model provides a PP double-walled bellows for municipal administration blowdown which characterized in that: including first bellows (6), second flange (8), second bellows (12) and third flange (13), the one end of second flange (8) is connected with first bellows (6), second bellows (12) have been placed to the one end of first bellows (6), and one side of second bellows (12) is connected with third flange (13), the outside of first bellows (6) and second bellows (12) is provided with clamp ring (4), and the bottom of going up clamp ring (4) is connected with clamp ring (10) down, the outside activity of going up clamp ring (4) and clamp ring (10) down is provided with construction bolt (9), and construction bolt (9) are provided with four on last clamp ring (4) and clamp ring (10) down, the outside of construction bolt (9) is provided with third nut (11) through the screw thread activity.
2. The PP double-wall corrugated pipe for municipal sewage according to claim 1, wherein: a sealing ring (19) is arranged between the upper clamping ring (4) and the lower clamping ring (10), and one ends of the first corrugated pipe (6) and the second corrugated pipe (12) are clamped inside the sealing ring (19).
3. The PP double-wall corrugated pipe for municipal sewage according to claim 1, wherein: a first flange (3) is placed on one side of the third flange (13), and a first expansion pipe (14) is connected to the right side of the first flange (3).
4. The PP double-wall corrugated pipe for municipal sewage according to claim 3, wherein: one end of the first expansion pipe (14) is connected with a fixed flange (2), and the other end of the fixed flange (2) is connected with a second expansion pipe (16).
5. The PP double-wall corrugated pipe for municipal sewage according to claim 4, wherein: one end of the second expansion pipe (16) is connected with a first flange (3) in the same way, second holes (18) are formed in the fixing flange (2), the first flange (3), the second flange (8) and the third flange (13), and the number of the second holes (18) is four, and the second holes are symmetrical about the center.
6. The PP double-wall corrugated pipe for municipal sewage according to claim 5, wherein: be provided with first hole (17) on mounting flange (2), first flange (3), second flange (8) and third flange (13), and first hole (17) are provided with eight respectively at mounting flange (2), first flange (3), second flange (8) and third flange (13).
7. The PP double-wall corrugated pipe for municipal sewage according to claim 6, wherein: a sliding rod (15) is inserted into the second hole (18), first nuts (1) are arranged at two ends of the sliding rod (15), and the third flange (13) and the first flange (3) are fixed to each other through the first nuts (1).
8. The PP double-wall corrugated pipe for municipal sewage according to claim 6, wherein: a fixing rod (5) is inserted into the first hole (17), and second nuts (7) are arranged at two ends of the fixing rod (5) through threads.
9. The PP double wall corrugated pipe for municipal sewage according to claim 7, wherein: the center position of the sliding rod (15) is in mutual contact with the fixed flange (2), and the fixed flange (2) is fixed on the sliding rod (15) through the first nut (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110660311.0A CN113566042A (en) | 2021-06-15 | 2021-06-15 | PP double-wall corrugated pipe for municipal sewage disposal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110660311.0A CN113566042A (en) | 2021-06-15 | 2021-06-15 | PP double-wall corrugated pipe for municipal sewage disposal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113566042A true CN113566042A (en) | 2021-10-29 |
Family
ID=78162024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110660311.0A Pending CN113566042A (en) | 2021-06-15 | 2021-06-15 | PP double-wall corrugated pipe for municipal sewage disposal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113566042A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB613350A (en) * | 1945-10-08 | 1948-11-25 | Metallschlauchfabrik Ag | Improvements in or relating to pipe expansion joints |
| CN202284696U (en) * | 2011-11-04 | 2012-06-27 | 天津盛象塑料管业有限公司 | Connection clamping hoop structure for two-wall straight corrugated pipe |
| CN208670339U (en) * | 2018-06-05 | 2019-03-29 | 青海瑞合管业有限公司 | A kind of HPDE double-wall corrugated pipe convenient for connection |
| CN209262509U (en) * | 2018-12-20 | 2019-08-16 | 吴俊霖 | A kind of internal and external pressure balance type compensator |
| CN111076019A (en) * | 2020-02-24 | 2020-04-28 | 云南傲远智能环保科技有限公司 | Double-wall corrugated pipe buckle sealing connection device |
| CN211344333U (en) * | 2019-12-06 | 2020-08-25 | 江苏申视新材料科技有限公司 | Bellows assembly joint easy to assemble |
| CN111637308A (en) * | 2020-07-06 | 2020-09-08 | 刘江炜 | Corrugated expansion joint |
| CN111750197A (en) * | 2020-08-06 | 2020-10-09 | 山东华舜重工集团有限公司 | Large double-layer corrugated expansion joint |
| CN111998158A (en) * | 2020-08-06 | 2020-11-27 | 梁艳艳 | Bellows expansion joint and bellows thereof |
| CN212564823U (en) * | 2020-06-02 | 2021-02-19 | 江西荣塑管业有限公司 | Double-wall corrugated pipe quick connection structure |
| CN212616996U (en) * | 2020-04-16 | 2021-02-26 | 广州石化建筑安装工程有限公司 | Novel corrugated pipe mechanical seal compensation part for high-temperature centrifugal pump |
-
2021
- 2021-06-15 CN CN202110660311.0A patent/CN113566042A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB613350A (en) * | 1945-10-08 | 1948-11-25 | Metallschlauchfabrik Ag | Improvements in or relating to pipe expansion joints |
| CN202284696U (en) * | 2011-11-04 | 2012-06-27 | 天津盛象塑料管业有限公司 | Connection clamping hoop structure for two-wall straight corrugated pipe |
| CN208670339U (en) * | 2018-06-05 | 2019-03-29 | 青海瑞合管业有限公司 | A kind of HPDE double-wall corrugated pipe convenient for connection |
| CN209262509U (en) * | 2018-12-20 | 2019-08-16 | 吴俊霖 | A kind of internal and external pressure balance type compensator |
| CN211344333U (en) * | 2019-12-06 | 2020-08-25 | 江苏申视新材料科技有限公司 | Bellows assembly joint easy to assemble |
| CN111076019A (en) * | 2020-02-24 | 2020-04-28 | 云南傲远智能环保科技有限公司 | Double-wall corrugated pipe buckle sealing connection device |
| CN212616996U (en) * | 2020-04-16 | 2021-02-26 | 广州石化建筑安装工程有限公司 | Novel corrugated pipe mechanical seal compensation part for high-temperature centrifugal pump |
| CN212564823U (en) * | 2020-06-02 | 2021-02-19 | 江西荣塑管业有限公司 | Double-wall corrugated pipe quick connection structure |
| CN111637308A (en) * | 2020-07-06 | 2020-09-08 | 刘江炜 | Corrugated expansion joint |
| CN111750197A (en) * | 2020-08-06 | 2020-10-09 | 山东华舜重工集团有限公司 | Large double-layer corrugated expansion joint |
| CN111998158A (en) * | 2020-08-06 | 2020-11-27 | 梁艳艳 | Bellows expansion joint and bellows thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211029 |