CN114623305B - High impact resistance water supply and drainage pipeline - Google Patents
High impact resistance water supply and drainage pipeline Download PDFInfo
- Publication number
- CN114623305B CN114623305B CN202210256935.0A CN202210256935A CN114623305B CN 114623305 B CN114623305 B CN 114623305B CN 202210256935 A CN202210256935 A CN 202210256935A CN 114623305 B CN114623305 B CN 114623305B
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- Prior art keywords
- hole
- fixedly connected
- water supply
- drainage pipeline
- shell
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000007789 sealing Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000013049 sediment Substances 0.000 description 6
- 239000010865 sewage Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- F16L43/00—Bends; Siphons
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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
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
-
- 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
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
-
- 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
-
- 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
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention discloses a high-impact-resistance water supply and drainage pipeline, and belongs to the technical field of water supply and drainage pipelines. This high impact resistance water supply and drainage pipeline includes: the side wall of the bent pipe, which is far away from the rotation center, is provided with a first through hole; one end of the baffle is hinged to the side wall of the first through hole through a hinge shaft, and the hinge shaft is perpendicular to the radian direction of the bent pipe; the outer shell is fixedly connected with the outer wall of the first through hole of the bent pipe, and the outer shell completely covers the first through hole; one end of the spring is connected with the bottom wall of the inner side of the shell, and the other end of the spring is connected with the baffle plate. The high impact resistance water supply and drainage pipeline is provided with the rotatable baffle plate, so that the diameter of the bent pipe is changed, the flow speed of water flow is reduced, the baffle plate bears most of impact of water flow at the water inlet end, the impact force is partially absorbed through compression of the spring, the abrasion of the water flow to the baffle plate is reduced, and the high impact resistance water supply and drainage pipeline is longer in service life and better in stability.
Description
Technical Field
The invention relates to the technical field of water supply and drainage pipelines, in particular to a high-impact-resistance water supply and drainage pipeline.
Background
The water supply and drainage pipeline engineering is a pipeline (canal) system engineering for conveying and distributing industrial water and domestic drinking water and collecting, conveying and draining industrial wastewater, domestic sewage and rainwater, is an integral part of a water supply and drainage system, plays an important role on the whole water supply and drainage system, and comprises a pipeline (canal) system and various constructional engineering (such as a pump station, a reservoir, a pipe bridge, a gate well, a sewage inspection well, a water inlet for rain and the like) on the pipeline (canal) system.
Modern urban water is often conveyed through multistage pressurization, the linear pipeline is often subjected to higher radial pressure in the use process, however, the bent pipe is subjected to higher radial pressure in the use process, the side wall of the bent pipe far away from the rotation center is also subjected to the impact force of water flow, so that the friction force between the inner wall of the bent pipe and the water flow is increased, and the service life of the pipe body is reduced.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a water supply and drainage pipeline with high impact resistance.
The invention provides a high impact resistance water supply and drainage pipeline, which comprises: the side wall of the bent pipe, which is far away from the rotation center, is provided with a first through hole; one end of the baffle is hinged to the side wall of the first through hole through a hinge shaft, and the hinge shaft is perpendicular to the radian direction of the bent pipe; the outer shell is fixedly connected with the outer wall of the first through hole of the bent pipe, and the outer shell completely covers the first through hole; one end of the spring is connected with the bottom wall of the inner side of the shell, and the other end of the spring is connected with the baffle plate.
Preferably, the baffle is kept away from one side fixed connection lug of shell, the contour of lug all is equipped with the fillet, and is equipped with the second through-hole along return bend radian direction in the lug.
Preferably, the bottom wall of the shell is provided with a third through hole, a first bolt is penetrated in the third through hole, the middle part of the first bolt is provided with a cylindrical surface, the cylindrical surface is fixedly connected with the inner ring of the sealing bearing, the outer ring of the sealing bearing is fixedly connected with the side wall of the third through hole, the end part of the first bolt is in threaded connection with a nut, the nut is fixedly connected with a first sliding block, the first sliding block is in sliding connection with a track groove, and the track groove is vertical and fixedly connected with the bottom wall of the shell; the nut is connected with the end face of the spring.
Preferably, one end of a connecting rod is hinged to the outer side of the bottom wall of the shell, and the other end of the connecting rod is fixedly connected with two clamping plates which are parallel to each other.
Preferably, the two sides of the nut are respectively fixedly connected with a first sliding block, each first sliding block corresponds to a track groove, and the length direction of the track groove is perpendicular to the bottom wall of the shell.
Preferably, the elbow is provided with a water inlet end and a water outlet end, and the water inlet end and the water outlet end are both fixedly connected with a flange; the hinge shaft is positioned on the side wall of the first through hole close to the water outlet end.
Preferably, the two opposite side surfaces of the baffle are fixedly connected with second sliding blocks, the straight lines where the two second sliding blocks are located are parallel to the hinge shaft, each second sliding block is correspondingly and slidably connected with a sliding groove, and the sliding groove is arranged on the side wall of the first through hole.
Preferably, a threaded hole for discharging sewage is formed in one side, close to the water outlet end, of the shell, and the threaded hole is in threaded connection with the second bolt.
Compared with the prior art, the invention has the beneficial effects that: according to the high-impact-resistance water supply and drainage pipeline, the rotatable baffle is arranged to change the diameter of the bent pipe so as to reduce the flow velocity of water flow, the baffle bears most impact of water flow at the water inlet end, and the impact force is partially absorbed through compression of the spring, so that abrasion of the water flow to the baffle is reduced, the service life of the high-impact-resistance water supply and drainage pipeline is longer, and the stability is better.
The design of the convex blocks and the second through holes can prevent the baffle from frequently and greatly compressing the spring, reduce larger water flow fluctuation and avoid dangerous occurrence; meanwhile, the sediment mixed in the water flow can flow through the second through holes, so that the problem of sediment accumulation after the water flow velocity at the baffle plate is reduced is solved.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a schematic view of a bump according to the present invention;
FIG. 3 is an enlarged view of a portion of the first bolt of the present invention;
FIG. 4 is a schematic view of a chute according to the present invention;
fig. 5 is an external schematic view of the present invention.
Reference numerals illustrate:
1. the device comprises a bent pipe, a baffle plate, a hinge shaft, a shell, a spring, a lug, a second through hole, a first bolt, a sealing bearing, a nut, a first sliding block, a track groove, a connecting rod, a clamping plate, a water inlet end, a water outlet end, a second sliding block, a sliding groove and a second bolt.
Detailed Description
The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a high impact resistance water supply and drainage pipeline, which comprises the following components in fig. 1-3: the device comprises an elbow pipe 1, a baffle plate 2, a shell 4 and a spring 5, wherein a first through hole is formed in the side wall, far away from the rotation center, of the elbow pipe 1; one end of the baffle plate 2 is hinged to the side wall of the first through hole through a hinge shaft 3, and the hinge shaft 3 is perpendicular to the radian direction of the bent pipe 1; the outer wall of the first through hole of the bent pipe 1 is fixedly connected with the outer shell 4, and the outer shell 4 completely covers the first through hole; one end of the spring 5 is connected with the bottom wall of the inner side of the shell 4, and the other end is connected with the baffle plate 2.
When water flows through the elbow pipe 1, the water flows impact and friction on the side wall of the elbow pipe 1 far away from the rotation center, the impact force of the water flows is applied to the baffle plate 2, one side of the baffle plate 2 is inclined and compresses the spring 5, the pipe diameter of the elbow pipe 1 at the baffle plate 2 is increased, the water flow speed is reduced, and after the water flows through the baffle plate 2, the pipe diameter of the elbow pipe 1 is not changed, and the water flow speed is recovered; the greater (or lesser) the impact force of the water flow, the greater (or lesser) the angle at which the baffle 2 is inclined, the lower (or faster) the flow rate of the water flow therein, the lesser (or greater) the friction of the water flow against the baffle 2; the high impact resistance water supply and drainage pipeline can adaptively change the pipe diameter of the elbow pipe 1 at the baffle plate 2 according to the water flow pressure and impact force, so that the water flow rate is changed, the service life of the high impact resistance water supply and drainage pipeline is longer, and the stability is better.
Preferably, as shown in fig. 1-2, a bump 6 is fixedly connected to one side of the baffle 2 away from the housing 4, the outline of the bump 6 is provided with a round corner, and a second through hole 7 along the radian direction of the bent pipe 1 is arranged in the bump 6.
If the water flow rate is unstable, the baffle 2 is easy to frequently compress the spring 5, so that fluctuation of water flow is large, danger occurs, the structure is designed for the problem that when the water flow impacts the baffle 2, the baffle 2 compresses the spring 5, the pipe diameter is increased, the water flow rate is slowed down, meanwhile, the bump 6 occupies part of the pipe diameter, the pipe diameter can be prevented from being excessively increased, part of water flow still can pass through the second through holes 7, the problem that the baffle 2 frequently compresses the spring 5 greatly is solved, the fluctuation of the water flow is reduced, and the danger is avoided. Meanwhile, the mixed sediment in the water flow can flow from the second through holes 7, so that the sediment accumulation problem is avoided after the water flow velocity at the baffle plate 2 is reduced.
Preferably, as shown in fig. 3, a third through hole is formed in the bottom wall of the housing 4, a first bolt 8 is inserted into the third through hole, a cylindrical surface is arranged in the middle of the first bolt 8, the cylindrical surface is fixedly connected with an inner ring of the sealing bearing 9, an outer ring of the sealing bearing 9 is fixedly connected with the side wall of the third through hole, an end part of the first bolt 8 is in threaded connection with a nut 10, the nut 10 is fixedly connected with a first sliding block 11, the first sliding block 11 is in sliding connection with a track groove 12, and the track groove 12 is vertical and fixedly connected with the bottom wall of the housing 4; a nut 10 is attached to the end face of the spring 5.
Also, in order to accommodate the impact force generated by the water flow at different flow rates, the above structure capable of changing the elastic force of the spring 5 is designed, the first bolt 8 is rotated in the forward direction (or the reverse direction), the first bolt 8 is rotated, the nut 10 is driven to move along the length direction of the rail groove 12, the nut 10 is more (or more) moved away from the baffle plate 2, and the elastic force of the spring 5 is increased (or decreased).
Preferably, as shown in fig. 3, one end of the connecting rod 13 is hinged to the outer side of the bottom wall of the housing 4, and the other end of the connecting rod 13 is fixedly connected with two clamping plates 14 which are parallel to each other.
The purpose is to prevent the first bolt 8 from rotating after the elasticity of the spring 5 is adjusted, the connecting rod 13 is rotated, and the two clamping plates 14 clamp the bolt head of the first bolt 8.
Preferably, as shown in fig. 3, two sides of the nut 10 are fixedly connected with a first slider 11, each first slider 11 corresponds to a track groove 12, and the length direction of the track groove 12 is perpendicular to the bottom wall of the housing 4.
The aim is to better restrain the nut 10 so that the nut 10 can move more stably along the length direction of the rail groove 12.
Preferably, as shown in fig. 1, the elbow pipe 1 is provided with a water inlet end 15 and a water outlet end 16, and the water inlet end 15 and the water outlet end 16 are fixedly connected with flanges; the hinge shaft 3 is located at a side wall of the first through hole near the water outlet end 16.
Preferably, as shown in fig. 2-4, two opposite sides of the baffle 2 are fixedly connected with second sliding blocks 17, a straight line where the two second sliding blocks 17 are located is parallel to the hinge shaft 3, each second sliding block 17 is correspondingly and slidably connected with a sliding groove 18, and the sliding groove 18 is arranged on the side wall of the first through hole.
The purpose is to limit the maximum angle of rotation of the baffle 2 and prevent the baffle 2 from over-rotating.
Preferably, as shown in fig. 1-5, a threaded hole for discharging sewage is formed in the side, close to the water outlet end 16, of the housing 4, and the threaded hole is in threaded connection with the second bolt 19.
The unscrewing of the second bolt 19 can be used to expel the sediment inside the housing 4, preventing the sediment from filling the interior of the housing 4, resulting in a limited compression of the spring 5.
The use method of the high impact resistance water supply and drainage pipeline comprises the following steps:
this high impact resistance water supply and drainage pipeline connects between two pipelines, according to the size of water inlet end water velocity of flow, suitably rotate first bolt 8 (when rotatory first bolt 8, listen the noise of outgoing in the shell 4, noise reduction indicates that the rotation degree of first bolt 8 is suitable), make spring 5's elasticity and suitable, rotatory connecting rod 13, the bolt head of first bolt 8 of two cardboard 14 chucking, after using one month time, unscrew second bolt 19, after the discharge silt, screw second bolt 19 again.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A high impact resistance water supply and drainage pipeline, comprising:
the side wall of the bent pipe (1) far away from the rotation center is provided with a first through hole;
one end of the baffle (2) is hinged to the side wall of the first through hole through a hinge shaft (3), and the hinge shaft (3) is perpendicular to the radian direction of the bent pipe (1);
the outer wall of the first through hole of the bent pipe (1) is fixedly connected with the outer shell (4), and the outer shell (4) completely covers the first through hole;
one end of the spring (5) is connected with the bottom wall of the inner side of the shell (4), and the other end of the spring is connected with the baffle (2);
one side of the baffle (2) far away from the shell (4) is fixedly connected with a convex block (6), the outline of the convex block (6) is provided with a round angle, and a second through hole (7) along the radian direction of the bent pipe (1) is arranged in the convex block (6);
the bottom wall of the shell (4) is provided with a third through hole, a first bolt (8) is arranged in the third through hole in a penetrating way, the middle part of the first bolt (8) is provided with a cylindrical surface, the cylindrical surface is fixedly connected with the inner ring of the sealing bearing (9), the outer ring of the sealing bearing (9) is fixedly connected with the side wall of the third through hole, the end part of the first bolt (8) is in threaded connection with a nut (10), the nut (10) is fixedly connected with a first sliding block (11), the first sliding block (11) is in sliding connection with a track groove (12), and the track groove (12) is vertical and is fixedly connected with the bottom wall of the shell (4); the nut (10) is connected with the end face of the spring (5).
2. The high impact water supply and drainage pipeline according to claim 1, wherein one end of a connecting rod (13) is hinged to the outer side of the bottom wall of the shell (4), and two clamping plates (14) parallel to each other are fixedly connected to the other end of the connecting rod (13).
3. The high impact water supply and drainage pipeline according to claim 1, wherein two sides of the nut (10) are fixedly connected with a first sliding block (11), each first sliding block (11) corresponds to a track groove (12), and the length direction of the track groove (12) is perpendicular to the bottom wall of the shell (4).
4. The high impact water supply and drainage pipeline according to claim 1, characterized in that the elbow pipe (1) is provided with a water inlet end (15) and a water outlet end (16), and the water inlet end (15) and the water outlet end (16) are fixedly connected with flanges; the hinge shaft (3) is positioned on the side wall of the first through hole close to the water outlet end (16).
5. The high impact resistance water supply and drainage pipeline according to claim 1, wherein two opposite side surfaces of the baffle plate (2) are fixedly connected with second sliding blocks (17), a straight line where the two second sliding blocks (17) are located is parallel to the hinge shaft (3), each second sliding block (17) is correspondingly and slidably connected with a sliding groove (18), and the sliding groove (18) is arranged on the side wall of the first through hole.
6. The high impact water supply and drainage pipeline according to claim 4, characterized in that a threaded hole for pollution discharge is formed in one side of the outer shell (4) close to the water outlet end (16), and the threaded hole is in threaded connection with a second bolt (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210256935.0A CN114623305B (en) | 2022-03-16 | 2022-03-16 | High impact resistance water supply and drainage pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210256935.0A CN114623305B (en) | 2022-03-16 | 2022-03-16 | High impact resistance water supply and drainage pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114623305A CN114623305A (en) | 2022-06-14 |
| CN114623305B true CN114623305B (en) | 2024-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210256935.0A Active CN114623305B (en) | 2022-03-16 | 2022-03-16 | High impact resistance water supply and drainage pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114623305B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118373208B (en) * | 2024-06-25 | 2024-09-17 | 常州市嘉文环保设备有限公司 | Pneumatic conveying equipment for particulate matters and conveying method thereof |
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| CA1203389A (en) * | 1984-03-26 | 1986-04-22 | Joseph A.B. Grondin (Deceased) | Method for installing elbows for sewers |
| DE3901618A1 (en) * | 1989-01-20 | 1990-07-26 | Stahlgruber Gruber & Co Otto | Pipeline bend |
| DE19608154A1 (en) * | 1996-03-04 | 1997-09-11 | Trost Baerbel | Pneumatic pipe conveyor corner piece |
| JP2004143759A (en) * | 2002-10-23 | 2004-05-20 | Noriatsu Kojima | Drainage facility and its construction method |
| JP2006274795A (en) * | 2003-09-02 | 2006-10-12 | Kubota Ci Kk | Water channel structural member |
| CN105299370A (en) * | 2014-07-08 | 2016-02-03 | 中联重科股份有限公司 | Conveying pipeline and concrete pumping equipment |
| CN204628915U (en) * | 2015-05-27 | 2015-09-09 | 陈裕龙 | A kind of unhurried current bend pipe tools |
| KR101704344B1 (en) * | 2016-05-16 | 2017-02-08 | 조민선 | Water hammer arrestor |
| CN207584248U (en) * | 2017-12-06 | 2018-07-06 | 浙江固的管业有限公司 | A kind of three-way pipe |
| CN208535412U (en) * | 2018-07-03 | 2019-02-22 | 福州强力管道设备有限公司 | A kind of channel bend with buffering effect |
| JP2020045921A (en) * | 2018-09-14 | 2020-03-26 | 積水化学工業株式会社 | Sound insulation member and joint structure |
| CN209164864U (en) * | 2018-11-21 | 2019-07-26 | 潍坊派尔机械配套有限公司 | A kind of washing-preventing pipeline elbow |
| CN210600621U (en) * | 2019-08-05 | 2020-05-22 | 江苏三力防腐管阀件有限公司 | PP socket elbow that stability is strong |
| CN212203570U (en) * | 2020-06-11 | 2020-12-22 | 王永东 | Pipeline protection device for oil exploitation |
| CN213040050U (en) * | 2020-09-01 | 2021-04-23 | 青岛远通达中通能源集团有限公司 | High-efficient heat preservation connection return bend |
| CN213712255U (en) * | 2020-11-25 | 2021-07-16 | 谱源（厦门）流体技术有限公司 | Elbow with prevent blockking up structure |
| CN214093523U (en) * | 2020-12-02 | 2021-08-31 | 河南康宅塑业有限公司 | Corrosion-resistant PVC pipe for sewage discharge |
| CN214662871U (en) * | 2021-04-27 | 2021-11-09 | 荣成市长青环保能源有限公司 | Conveying pipeline elbow with protection function |
| CN214839188U (en) * | 2021-05-25 | 2021-11-23 | 天津市塘沽新海船舶工程有限公司 | Discharge elbow for dredge pump |
| CN215928809U (en) * | 2021-09-28 | 2022-03-01 | 江苏贽策管道科技有限公司 | Road surface transition joint of leak protection water |
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