CN114076232A - Hydraulic engineering pipeline connecting device - Google Patents
Hydraulic engineering pipeline connecting device Download PDFInfo
- Publication number
- CN114076232A CN114076232A CN202111167318.5A CN202111167318A CN114076232A CN 114076232 A CN114076232 A CN 114076232A CN 202111167318 A CN202111167318 A CN 202111167318A CN 114076232 A CN114076232 A CN 114076232A
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- hydraulic engineering
- connecting cylinder
- sealing
- wall
- fixedly connected
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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
- F16L21/00—Joints with sleeve or socket
- F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention discloses a hydraulic engineering pipeline connecting device, which specifically comprises: the fixing ball is communicated with fixing pipes on two sides, and internal threads are arranged on the inner wall of each fixing pipe; the connecting device is arranged in the fixed pipe and is in threaded connection with the inner wall of the fixed pipe, and one end of the connecting device extends to the outside of the fixed pipe; the connecting device includes: one end of the inner wall of the connecting cylinder is connected with a sealing device in a threaded manner, and the part of the connecting cylinder, which is positioned outside the fixed pipe, is fixedly connected with a rotating ring through a bracket; the invention relates to the technical field of hydraulic engineering, in particular to a positioning device which is arranged at one end, far away from a sealing device, of a connecting cylinder and is provided with a plurality of groups which are uniformly distributed on the connecting cylinder. This hydraulic engineering pipe connection device, adaptability is better, when inside to the pipeline of different diameters, need not to select suitable connecting device to sealed easy operation, convenient to use.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering, in particular to a hydraulic engineering pipeline connecting device.
Background
Hydraulic engineering is an engineering built for controlling and allocating surface water and underground water in nature to achieve the purposes of removing harmful substances and benefiting. The water conservancy project only needs to build dams, dikes, spillways, sluices, water inlets, channels, transition troughs, rafts, fishways and other different types of hydraulic buildings to achieve the purposes of the water conservancy project.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a hydraulic engineering pipeline connecting device, which solves the problems that the pipeline connecting device used in the existing hydraulic engineering can only be connected with a pipeline matched with the device, when the pipe diameter of the pipeline changes, a proper connecting device needs to be replaced, the adaptability of the connecting device is poor, and the use is inconvenient.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a hydraulic engineering pipeline connecting device specifically includes:
the fixing ball is communicated with fixing pipes on two sides, and internal threads are arranged on the inner wall of each fixing pipe;
the connecting device is arranged in the fixed pipe and is in threaded connection with the inner wall of the fixed pipe, and one end of the connecting device extends to the outside of the fixed pipe;
the connecting device includes:
one end of the inner wall of the connecting cylinder is connected with a sealing device in a threaded manner, and the part of the connecting cylinder, which is positioned outside the fixed pipe, is fixedly connected with a rotating ring through a bracket;
the positioning device is arranged at one end, far away from the sealing device, of the connecting cylinder and is provided with a plurality of groups which are uniformly distributed on the connecting cylinder.
Preferably, the outer side of the connecting cylinder is provided with external threads and is in threaded connection with the inner wall of the fixed pipe, and the bottom of the positioning device is in pipe friction mixing connection with the connecting cylinder and extends into the connecting cylinder.
Preferably, the positioning device comprises a positioning seat, the top of the positioning seat is penetrated and connected with a threaded rod in a threaded manner, the bottom of the threaded rod is penetrated and connected with a supporting plate in a rotating manner, one end, penetrating through the supporting plate, of the threaded rod is connected with a pressing plate in a rotating manner through a bearing, and the top of the supporting plate is located on part of fixedly connected guide rods on two sides of the threaded rod.
When the pipeline fixing device is used, two groups of pipelines to be connected are respectively inserted into the connecting devices at two sides of the fixing ball, then the end parts of the pipelines are tightly pressed by the sealing devices in the connecting devices to be sealed, then the pipelines are fixed by the positioning devices, when the pipelines with different diameters need to be fixed, the threaded rod is rotated, the threaded rod drives the pressing plate to move in the connecting cylinder to adapt to the pipelines with different diameters, the adaptability is better, when the pipelines with different diameters are used, a proper connecting device does not need to be selected, the pipeline fixing device is convenient to use, the pipeline fixing device is provided with the supporting plate and the pressing plate, the pressing plate is in a long strip shape, two sides of the supporting plate are connected with two ends of the pressing plate through the ejector rods, two ends of the pressing plate can be tightly pressed through the ejector rods, the pressing plate is prevented from being deformed, the connected pipelines can be prevented from moving obliquely in the connecting cylinder, the pipeline fixing device is safe and reliable to use, and is provided with the guide rods, when the pressure strip moves, the movement direction of the pressure strip can be limited through the guide rod, when the pressure strip is pressed on a connected pipeline, the pressure strip can be tightly pushed by the guide rod and the threaded rod, and the threaded rod can be prevented from bending.
Preferably, the bottom of the positioning seat is fixedly connected with the connecting cylinder, the supporting plate and the pressing plate are arranged inside the connecting cylinder, and the top of the guide rod penetrates through the connecting cylinder and the positioning seat and is in sliding connection with the connecting cylinder and the positioning seat.
Preferably, a rotating handle is arranged at the top of the threaded rod, and two sides of the supporting plate are fixedly connected with the pressing plate through ejector rods.
Preferably, the sealing device comprises an outer sealing ring, an inner sealing ring is in threaded connection with the inner wall of the outer sealing ring, an inclined sealing table is arranged at one end of the outer sealing ring and one end of the inner sealing ring, a sealing groove is formed in the top of the inclined sealing table, a sealing gasket is fixedly connected to the top of the sealing groove, and a cross groove is formed in one side, away from the inclined sealing table, of the outer sealing ring and one side, away from the inclined sealing table, of the inner sealing ring.
Preferably, the inner seal circle includes the adapter sleeve, adapter sleeve one end outside fixedly connected with arc seal circle, arc seal circle inner wall fixedly connected with arc shell fragment, support fixedly connected with top tight spring is passed through to arc shell fragment bottom, the arc shell fragment is provided with the multiunit and connects through the connection piece, the inner seal circle is provided with the multiunit and a set of setting in the front a set of inside and rather than inner wall threaded connection after and.
When the connecting pipeline is inserted into the connecting cylinder, one end of the connecting pipeline is tightly pressed on an inclined sealing table in the sealing device, the pipeline wall is tightly pressed on the sealing gasket and is sunk into the sealing groove, at the moment, the sealing gasket is deformed and is tightly pressed on the pipe wall at one end of the connecting pipeline through the elasticity generated by deformation, the connecting pipeline can be sealed, the sealing operation is simple and the use is convenient, in addition, the outer sealing rings and the inner sealing rings are arranged, the inner sealing rings are provided with a plurality of groups, when the pipe diameter of the connecting pipeline is changed, the inner sealing rings can be assembled and disassembled to adapt to the connecting pipelines with different diameters, the sealing adaptability is better, the inner sealing rings in each group are connected through threads, the assembly and disassembly are more convenient, the arc-shaped sealing gaskets are arranged on the outer sides of the inner sealing rings, when the inner sealing rings are mutually connected, the arc-shaped sealing rings extrude the arc-shaped sealing gaskets, and extrude arc-shaped elastic sheets, the arc-shaped sealing gasket is extruded by the jacking spring and the support to be tightly attached to the inner wall of the inner sealing ring on the outer side, sealing can be achieved, the larger the water pressure is, the more the inner sealing ring on the inner side and the arc-shaped sealing gasket are tightly attached to the inner sealing ring on the outer side, the larger the pressing force between the arc-shaped sealing gasket and the inner sealing ring is, and the sealing effect is better.
(III) advantageous effects
The invention provides a hydraulic engineering pipeline connecting device. The method has the following beneficial effects:
(1) this hydraulic engineering pipeline connecting device, be provided with positioner, it is inside that two sets of pipelines that will connect insert the connecting device of fixed ball both sides respectively, then seal up the pipeline tip through the inside sealing device top of connecting device, then fix the pipeline through positioner can, when the pipeline of different diameters is fixed to needs, the rotation threaded rod, the threaded rod drives the pressure strip and can adapt to the pipeline of different diameters at connecting cylinder inside removal, adaptability is better, when the pipeline to different diameters is inside, need not to select suitable connecting device, high durability and convenient use.
(2) This hydraulic engineering pipeline connecting device is provided with backup pad and pressure strip, and the shape of pressure strip is rectangular shape, and the backup pad both sides are passed through the ejector pin and are connected with the pressure strip both ends, and accessible ejector pin is tight with pressure strip both ends top, avoids the pressure strip to produce deformation, can avoid the pipeline of connecting in the inside slope activity of connecting cylinder, uses safe and reliable.
(3) This hydraulic engineering pipeline connecting device is provided with the guide bar, and when the pressure strip removed, its moving direction was restricted to the accessible guide bar, when the pressure strip compressed tightly on the pipeline of connection, the accessible guide bar assisted screw pole pushed up the pressure strip tightly, can avoid the threaded rod to produce the bending.
(4) This hydraulic engineering pipeline connecting device is provided with sealing device, and when connecting tube inserted the connecting cylinder inside, one end top was tight on the inside slope seal platform of sealing device, and the pipeline wall compresses tightly inside sealing gasket and is absorbed in the seal groove on sealing gasket, and sealed the pad produces deformation this moment to the elasticity that produces through deformation compresses tightly can seal connecting tube on connecting tube's one end pipe wall, sealed easy operation, convenient to use.
(5) This hydraulic engineering pipe connection device, be provided with outer sealing washer and inner seal circle, the inner seal circle is provided with the multiunit, when the pipe diameter of connecting tube changes, the connecting tube of accessible dismouting inner seal circle in order to adapt to different diameters, sealed adaptability is better, the sealed pad of top tight spring and support extrusion arc makes it hug closely on the inner seal circle inner wall in the outside, can realize sealing, water pressure can drive the inner seal circle in inboard and the sealed pad of arc more hugs closely the inner seal circle in the outside more greatly, the packing force between the sealed pad of arc and the inner seal circle is big more, sealed effect is better.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic view of a connecting device according to the present invention;
FIG. 4 is a schematic view of a positioning device according to the present invention;
FIG. 5 is a schematic view of the sealing device of the present invention;
fig. 6 is a schematic structural view of the inner seal ring of the present invention.
In the figure: 1. the sealing device comprises a fixing ball, 2, a fixing pipe, 3, a connecting device, 31, a connecting cylinder, 32, a sealing device, 321, an outer sealing ring, 322, an inner sealing ring, a1, a connecting sleeve, a2, an arc-shaped sealing gasket, a3, an arc-shaped elastic sheet, a4, a jacking spring, a5, a connecting sheet, 323, an inclined sealing table, 324, a sealing groove, 325, a sealing gasket, 326, a cross groove, 33, a rotating ring, 34, a positioning device, 341, a positioning seat, 342, a threaded rod, 343, a supporting plate, 344, a pressing plate, 345 and a guide rod.
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 it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-4, the present invention provides a technical solution: a hydraulic engineering pipeline connecting device specifically includes:
the fixing device comprises a fixing ball 1, wherein two sides of the fixing ball 1 are communicated with fixing pipes 2, and inner threads are arranged on the inner walls of the fixing pipes 2;
the connecting device 3 is arranged inside the fixed pipe 2 and is in threaded connection with the inner wall of the fixed pipe 2, and one end of the connecting device 3 extends to the outside of the fixed pipe 2;
the connecting device 3 includes:
a sealing device 32 is connected with one end of the inner wall of the connecting cylinder 31 through threads, and a rotating ring 33 is fixedly connected with the part of the connecting cylinder 31, which is positioned outside the fixed pipe 2, through a bracket;
the positioning device 34, the positioning device 34 is disposed on one end of the connecting cylinder 31 far away from the sealing device 32, and the positioning devices 34 are disposed in multiple groups and are uniformly distributed on the connecting cylinder 31.
The positioning device 34 includes a positioning seat 341, the top of the positioning seat 341 is penetrated and screwed with a threaded rod 342, the bottom of the threaded rod 342 is penetrated and screwed with a supporting plate 343, one end of the threaded rod 342 penetrating the supporting plate 343 is rotatably connected with a pressing plate 344 through a bearing, and the top of the supporting plate 344 is located on the part fixedly connected with guide rods 345 at the two sides of the threaded rod 342.
When the pipeline fixing device is used, two groups of pipelines to be connected are respectively inserted into the connecting devices 3 at two sides of the fixing ball 1, then the end parts of the pipelines are tightly propped against the end parts of the pipelines through the sealing devices 32 in the connecting devices 31, then the pipelines are fixed through the positioning devices 34, when the pipelines with different diameters need to be fixed, the threaded rod 342 is rotated, the threaded rod 342 drives the pressing plate 344 to move in the connecting cylinder 31 so as to adapt to the pipelines with different diameters, the adaptability is good, when the pipelines with different diameters are used, a proper connecting device does not need to be selected, the pipeline fixing device is convenient to use, the supporting plate 343 and the pressing plate 344 are arranged, the pressing plate 344 is in a long strip shape, two sides of the supporting plate 343 are connected with two ends of the pressing plate 344 through ejector rods, two ends of the pressing plate 344 can be tightly propped through the ejector rods, the pressing plate 344 is prevented from being deformed, and the inclined movement of the connected pipelines in the connecting cylinder 31 can be avoided, the device is safe and reliable in use, and is provided with the guide rod 345, when the pressing plate 344 moves, the moving direction of the pressing plate can be limited through the guide rod 345, when the pressing plate 344 presses on a connected pipeline, the pressing plate 344 can be tightly pressed through the guide rod 345 by assisting the threaded rod 342, and the threaded rod 342 can be prevented from bending.
Example two:
referring to fig. 1-6, the present invention provides a technical solution based on the first embodiment: the sealing device 32 comprises an outer sealing ring 321, an inner sealing ring 322 is connected with the inner wall of the outer sealing ring 321 through threads, one end of each of the outer sealing ring 321 and the inner sealing ring 322 is provided with an inclined sealing platform 323, the top of the inclined sealing platform 323 is provided with a sealing groove 324, the top of the sealing groove 324 is fixedly connected with a sealing gasket 325, one side of each of the outer sealing ring 321 and the inner sealing ring 322, which is far away from the inclined sealing platform 323, is provided with a cross groove 326, the inner sealing ring 322 comprises a connecting sleeve a1, an arc-shaped sealing gasket a2 is fixedly connected to the outer side of one end of the connecting sleeve a1, the inner wall of the arc-shaped sealing gasket a2 is fixedly connected with an arc-shaped elastic sheet a3, the bottom of the arc-shaped elastic sheet a3 is fixedly connected with a jacking spring a4 through a bracket, the arc-shaped elastic sheets a3 are provided with a plurality of groups and are connected through a connecting sheet a5, the inner sealing ring 322 is provided with a plurality of groups, and the latter group is arranged in the former group and is in threaded connection with the inner wall of the former group.
When the connecting pipeline is inserted into the connecting cylinder 31, one end of the connecting pipeline is tightly pressed against the inclined sealing platform 323 in the sealing device 32, the pipeline wall is tightly pressed on the sealing gasket 325 and is sunk into the sealing groove 324, at the moment, the sealing gasket 325 is deformed, and the elastic force generated by deformation is tightly pressed on the pipe wall at one end of the connecting pipeline, so that the connecting pipeline can be sealed, the sealing operation is simple and convenient, the connecting pipeline is provided with the outer sealing ring 321 and the inner sealing ring 322, the inner sealing rings 322 are provided with a plurality of groups, when the pipe diameter of the connecting pipeline is changed, the inner sealing rings 322 can be disassembled and assembled to adapt to connecting pipelines with different diameters, the sealing adaptability is good, the inner sealing rings 322 in each group are connected through threads, the disassembly and assembly are convenient, the arc-shaped sealing gasket a2 is arranged outside the inner sealing rings 322, when the inner sealing rings 322 are connected with each other, the arc-shaped sealing gasket a2 is extruded by the inner sealing ring 322 at the outer side, the arc-shaped sealing gasket a2 deforms and extrudes the arc-shaped elastic sheet a3, the arc-shaped sealing gasket a2 is extruded through the jacking spring a4 and the bracket to be tightly attached to the inner wall of the inner sealing ring 322 on the outer side, sealing can be achieved, the inner sealing ring 322 on the inner side and the arc-shaped sealing gasket a2 can be driven to be more tightly attached to the inner sealing ring on the outer side when the water pressure is higher, the pressing force between the arc-shaped sealing gasket a2 and the inner sealing ring 322 is higher, and the sealing effect is better.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A hydraulic engineering pipeline connecting device specifically includes:
the fixing device comprises a fixing ball (1), wherein both sides of the fixing ball (1) are communicated with fixing pipes (2), and inner threads are arranged on the inner wall of each fixing pipe (2);
the connecting device (3) is arranged inside the fixed pipe (2) and is in threaded connection with the inner wall of the fixed pipe (2), and one end of the connecting device (3) extends to the outside of the fixed pipe (2);
this hydraulic engineering pipe connection device's characterized in that: the connection device (3) comprises:
the connecting tube (31), one end of the inner wall of the connecting tube (31) is connected with a sealing device (32) in a threaded manner, and the part of the connecting tube (31) positioned at the outer side of the fixed tube (2) is fixedly connected with a rotating ring (33) through a bracket;
the sealing device comprises a positioning device (34), wherein the positioning device (34) is arranged at one end, far away from the sealing device (32), of the connecting cylinder (31), and multiple groups of positioning devices (34) are arranged and uniformly distributed on the connecting cylinder (31).
2. A hydraulic engineering pipe connection according to claim 1, characterized in that: the outer side of the connecting cylinder (31) is provided with external threads and is in threaded connection with the inner wall of the fixed pipe (2), and the bottom of the positioning device (34) is provided with a pipe friction mixing connecting cylinder (31) and extends into the connecting cylinder (31).
3. A hydraulic engineering pipe connection according to claim 1, characterized in that: the positioning device (34) comprises a positioning seat (341), the top of the positioning seat (341) penetrates through and is in threaded connection with a threaded rod (342), the bottom of the threaded rod (342) penetrates through and is in rotary connection with a supporting plate (343), one end, penetrating through the supporting plate (343), of the threaded rod (342) is in rotary connection with a pressing plate (344) through a bearing, and the top of the supporting plate (344) is located on a guide rod (345) fixedly connected with the two sides of the threaded rod (342).
4. A hydraulic engineering pipe connection according to claim 3, characterized in that: the bottom of the positioning seat (341) is fixedly connected with the connecting cylinder (31), the supporting plate (343) and the pressing plate (344) are arranged inside the connecting cylinder (31), and the top of the guide rod (345) penetrates through the connecting cylinder (31) and the positioning seat (341) and is in sliding connection with the connecting cylinder (31) and the positioning seat (341).
5. A hydraulic engineering pipe connection according to claim 3, characterized in that: the top of the threaded rod (342) is provided with a rotating handle, and the two sides of the supporting plate (343) are fixedly connected with the pressing plate (344) through ejector rods.
6. A hydraulic engineering pipe connection according to claim 1, characterized in that: sealing device (32) include external sealing ring (321), external sealing ring (321) inner wall threaded connection has inner seal circle (322), slope seal platform (323) have all been seted up to external sealing ring (321) and inner seal circle (322) one end, seal groove (324) have been seted up at slope seal platform (323) top, the sealed pad (325) of seal groove (324) top fixedly connected with, cross recess (326) have all been seted up to one side that slope seal platform (323) were kept away from in external sealing ring (321) and inner seal circle (322).
7. A hydraulic engineering pipe connection according to claim 6, characterized in that: interior sealing washer (322) are including adapter sleeve (a1), adapter sleeve (a1) one end outside fixedly connected with arc sealed pad (a2), arc sealed pad (a2) inner wall fixedly connected with arc shell fragment (a3), support fixedly connected with top tight spring (a4) is passed through to arc shell fragment (a3) bottom, arc shell fragment (a3) are provided with the multiunit and connect through connection piece (a5), interior sealing washer (322) are provided with the multiunit and a set of setting in the front a set of inside and rather than inner wall threaded connection after and.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111167318.5A CN114076232B (en) | 2021-10-04 | 2021-10-04 | Hydraulic engineering pipeline connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111167318.5A CN114076232B (en) | 2021-10-04 | 2021-10-04 | Hydraulic engineering pipeline connecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114076232A true CN114076232A (en) | 2022-02-22 |
| CN114076232B CN114076232B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111167318.5A Active CN114076232B (en) | 2021-10-04 | 2021-10-04 | Hydraulic engineering pipeline connecting device |
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| Country | Link |
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| CN (1) | CN114076232B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017026898A1 (en) * | 2015-08-10 | 2017-02-16 | Thor Frölich Braathen | A fitting to connect water pipes |
| EP3379130A1 (en) * | 2017-03-22 | 2018-09-26 | Dieter Bächle | Plastic exhaust gas sleeve and heating system |
| CN110886916A (en) * | 2019-10-21 | 2020-03-17 | 潜山县九鼎精密机械有限公司 | Pipeline splicing and positioning device for civil air defense engineering |
| CN212004593U (en) * | 2020-04-23 | 2020-11-24 | 蒋贞 | Fixing device of hydraulic engineering pipe laying |
| CN212745412U (en) * | 2020-06-29 | 2021-03-19 | 吉林钰翎珑钢管钢构制造有限公司 | Sealing ring for pipeline connection |
-
2021
- 2021-10-04 CN CN202111167318.5A patent/CN114076232B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017026898A1 (en) * | 2015-08-10 | 2017-02-16 | Thor Frölich Braathen | A fitting to connect water pipes |
| EP3379130A1 (en) * | 2017-03-22 | 2018-09-26 | Dieter Bächle | Plastic exhaust gas sleeve and heating system |
| CN110886916A (en) * | 2019-10-21 | 2020-03-17 | 潜山县九鼎精密机械有限公司 | Pipeline splicing and positioning device for civil air defense engineering |
| CN212004593U (en) * | 2020-04-23 | 2020-11-24 | 蒋贞 | Fixing device of hydraulic engineering pipe laying |
| CN212745412U (en) * | 2020-06-29 | 2021-03-19 | 吉林钰翎珑钢管钢构制造有限公司 | Sealing ring for pipeline connection |
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| Publication number | Publication date |
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| CN114076232B (en) | 2023-09-29 |
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Effective date of registration: 20230906 Address after: No. 27 Huaxing Road, Ligang Street, Jiangyin City, Wuxi City, Jiangsu Province, 214199 Applicant after: Jiangyin Chengli Construction Co.,Ltd. Address before: 510600 room 1520, financial building, 171 Haibin Road, Nansha District, Guangzhou, Guangdong Applicant before: Sun Yage |
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