CN111425690B - End device of drainage pipe - Google Patents
End device of drainage pipe Download PDFInfo
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- CN111425690B CN111425690B CN202010310194.0A CN202010310194A CN111425690B CN 111425690 B CN111425690 B CN 111425690B CN 202010310194 A CN202010310194 A CN 202010310194A CN 111425690 B CN111425690 B CN 111425690B
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- shaped notch
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000002265 prevention Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 101100008049 Caenorhabditis elegans cut-5 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
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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
- F16L55/05—Buffers therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention relates to a tail end device of a drainage pipe. The connecting pipe part is provided with a hanging bracket mechanism which is used for fixedly connecting the connecting pipe part with a bulkhead; the bottom end of the connecting pipe part is provided with a wedge-shaped notch, and the impact-proof plate part is fixedly connected below the wedge-shaped notch; the anti-impact plate part comprises an impact shell, one side of the impact shell, which faces the wedge-shaped notch, is of an open structure, an impact plate is assembled in the impact shell in a guiding and sliding mode, an elastic piece is arranged between the impact plate and the shell bottom of the impact shell, and the elastic piece is used for pushing the impact plate to the position of the open structure; the side wall of the impact shell is uniformly provided with water outlet holes. By adopting the dredging and draining pipe end device, the problem that the distance between the impact-proof plate and the tail end of the draining pipe is too small to influence the drainage quantity in the prior art is solved, the noise of water flow impact is reduced, and the condition that water flow directly collides with the impact-proof plate part in an impact manner is also avoided.
Description
Technical Field
The invention relates to a tail end device of a drainage pipe.
Background
In order to facilitate the timely evacuation of water, the bulkheads of the existing ships are usually provided with a plurality of drainage pipes, and most of the drainage pipes are vertically arranged, so that the deck or the outer wall of the ship, which is positioned right below the drainage pipes, is easily impacted by water, and the damage to the deck or the outer wall of the ship is further caused. In order to reduce the impact of water, an impact-proof plate is generally welded and fixed on a deck right below each drain pipe of an existing ship or an outer wall of the ship, specifically, as shown in fig. 1, the thickness of the impact-proof plate 7 is generally about 10mm, and the impact of water flow impact on the deck and the outer wall of the ship is reduced by arranging the impact-proof plate 7. However, the impact protection plate 7 has the following disadvantages: firstly, the distance between the impact prevention plate 7 and the tail end of the drain pipe 8 is often too small, which can affect the drainage quantity of the drain pipe 8; secondly, as the gap exists between the impact-proof plate 7 and the drain pipe 8, the flow can not be guided, so that the noise impacting on the impact-proof plate 7 is larger; thirdly, as the impact-proof plate 7 and the drain pipe 8 are separated, the impact-proof plate 7 has the risk of loss.
Disclosure of Invention
The invention aims to provide a drainage pipe end device, which is used for solving the technical problems that in the prior art, an impact-proof plate designed at the tail end of a drainage pipe influences the drainage quantity, and the drainage pipe end device has high noise and is easy to lose.
In order to achieve the purpose, the invention provides a drainage pipe end device, which adopts the following technical scheme:
a drainage pipe end device comprises a connecting pipe part and an impact-resistant plate part which are integrally arranged, wherein a hanging bracket mechanism is arranged on the connecting pipe part and is used for fixedly connecting the connecting pipe part with a bulkhead; the bottom end of the connecting pipe part is provided with a wedge-shaped notch, and the impact-proof plate part is fixedly connected below the wedge-shaped notch; the anti-impact plate part comprises an impact shell, one side of the impact shell, which faces the wedge-shaped notch, is of an open structure, an impact plate is assembled in the impact shell in a guiding and sliding mode, an elastic piece is arranged between the impact plate and the shell bottom of the impact shell, and the elastic piece is used for pushing the impact plate to the position of the open structure; and water outlet holes are uniformly distributed on the side wall of the impact shell.
Further, the impact plate is slidably fitted in the impact shell by a guide groove structure including a guide groove and a guide block, one of which is provided on an inner wall of the impact shell and the other of which is provided on an outer peripheral side of the impact plate.
Furthermore, the guide groove is arranged on the inner wall of the impact shell, the guide groove is a blind groove, and one side of the guide groove, which faces the opening structure, is not communicated with the outer surface of the impact shell.
Furthermore, the impact shell is arranged in a split mode and comprises a straight pipe section and a bottom plate, and the bottom plate is assembled at the bottom of the straight pipe section in a threaded mode.
Further, the guide groove is used for penetrating through one end facing the bottom plate and the bottom end face of the straight pipe section.
Further, the guide groove structure is plural and arranged at equal intervals along the circumferential direction of the impact shell.
Furthermore, a plurality of water permeable holes are uniformly distributed on the impact plate.
Further, setting the height of the wedge-shaped notch as H, setting the diameter of the connecting pipe part as DN, and when DN is not more than 50mm, setting the height H of the wedge-shaped notch to be not less than 40 mm; when DN is greater than 50mm, the height of the wedge-shaped cut is not less than DN.
Further, the length of the connecting pipe part is between 300mm and 500 mm.
Further, the impact plate is of a conical structure, and one end of the impact plate with a smaller size faces to one side of the wedge-shaped notch.
Compared with the prior art, the drainage pipe end device provided by the embodiment of the invention has the beneficial effects that: by adopting the drain pipe end device, accumulated water flowing out along the connecting pipe part can impact on the impact-proof plate part, so that the condition that water flow directly impacts on a deck or a bulkhead is avoided. Because the connecting pipe part is provided with the wedge-shaped notch, water flow is directly discharged from the wedge-shaped notch, so that the problem that the distance between the impact-proof plate and the tail end of the drain pipe is too small to influence the water discharge in the prior art is solved; because the anti-impact plate part and the connecting pipe part are integrally arranged, no gap interval exists between the anti-impact plate part and the connecting pipe part, and the noise caused by water flow impact is reduced; the problem that the impact-resistant plate is easy to lose is also avoided by the integrally arranged connecting tube part and the impact-resistant plate part. In addition, the impact-proof plate part comprises an impact shell, the impact plate and the elastic part are arranged in the impact shell, the impact effect of water flow can be buffered due to the arrangement of the impact plate and the elastic part, and the situation that the water flow directly collides with the impact-proof plate part in an impact manner is avoided.
Drawings
FIG. 1 is a schematic view of a prior art impact shield arrangement;
FIG. 2 is a schematic view of the overall structure of the end device of the drainage pipe according to the embodiment of the present invention;
FIG. 3 is a schematic sectional view showing the internal structure of the impact-proof plate of the end device of the drainage pipe according to the embodiment of the present invention;
FIG. 4 is a schematic view of the structure of the impingement plate of the end device of the drainage pipe of the embodiment of the present invention.
In the figure, 1-bulkhead, 2-hanger mechanism, 3-connecting pipe part, 4-impact-proof plate part, 401-impact shell, 402-bottom plate, 403-impact plate, 404-elastic part, 405-guiding groove, 406-water outlet hole, 407-water permeable hole, 408-guiding block, 5-wedge-shaped cut, 6-deck, 7-impact-proof plate and 8-drainage pipe.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 2 to 4, a drainage pipe end device according to a preferred embodiment of the present invention. The tail end device of the drainage pipe comprises a connecting pipe part 3 and an impact-resistant plate part 4 which are integrally arranged, wherein a hanging bracket mechanism 2 is arranged on the connecting pipe part 3, and the hanging bracket mechanism 2 is used for fixedly connecting the connecting pipe part 3 with the bulkhead 1; the bottom end of the connecting pipe part 3 is provided with a wedge-shaped notch 5, and the impact-proof plate part 4 is fixedly connected below the wedge-shaped notch 5; the impact-proof plate part 4 comprises an impact shell 401, one side of the impact shell 401, which faces the wedge-shaped notch 5, is of an open structure, an impact plate 403 is assembled in the impact shell 401 in a guiding and sliding manner, an elastic part 404 is arranged between the impact plate 403 and the shell bottom of the impact shell 401, and the elastic part 404 is used for pushing the impact plate 403 to the position of the open structure; water outlet holes 406 are uniformly distributed on the side wall of the impact shell 401.
Specifically, the connecting pipe portion 3 of this embodiment is a section of metal circular pipe, and this connecting pipe portion 3 is vertical along bulkhead 1 of boats and ships, and specifically, the top of connecting pipe portion 3 in this embodiment is fixed with the drain pipe welding, in order to avoid the condition that connecting pipe portion 3 acutely rocks, still install hanger mechanism 2 on connecting pipe portion 3 in this embodiment, hanger mechanism 2 specifically is the clamp, and the clamp includes two parts of semicircle type, and one of them part is fixed connection with bulkhead 1, another part then covers the outside at connecting pipe portion 3, and two parts of clamp pass through bolt and nut fixed connection. The height L of the connecting tube portion 3 in the present embodiment is 300mm, and the height of the connecting tube portion 3 in other embodiments may be any value between 300mm and 500mm, for example, 350mm, 400mm, 450mm, 500mm, or the like.
In the embodiment, the bottom end of the connecting pipe part 3 is provided with the wedge-shaped notch 5, the beveling angle of the wedge-shaped notch 5 is 45 degrees, the height H of the wedge-shaped notch 5 and the diameter DN of the connecting pipe part 3 have the following relation, and when the DN is not more than 50mm, the height H of the wedge-shaped notch 5 is not less than 40 mm; when DN is greater than 50mm, the height of wedge-shaped notch 5 is not less than DN. Specifically, in this embodiment, the height H of the wedge-shaped notch 5 is 80mm, and the diameter DN of the connecting tube portion 3 is 80 mm.
In this embodiment, the impact prevention plate portion 4 is welded and fixed just below the wedge-shaped notch 5, and the cross-sectional dimension of the impact prevention plate portion 4 is larger than the diameter of the connecting tube portion 3. In order to avoid the situation that water flow directly strikes on the impact-proof plate part 4, the impact-proof plate part 4 in this embodiment includes the impact shell 401, the top of the impact shell 401, which is used for facing the wedge-shaped notch 5, is an open structure, the inside of the impact shell 401 is guided to slide and is equipped with the impact plate 403, the elastic element 404 is installed between the impact plate 403 and the shell bottom of the impact shell 401, the elastic element 404 can push the impact plate 403 to the open structure side, and the elastic element 404 in this embodiment is a spring. As shown in fig. 3 and 4, in the present embodiment, the impact housing 401 is separately disposed, the impact housing 401 includes a straight pipe section and a bottom plate 402, the bottom plate 402 is used for plugging and fixing at the bottom of the straight pipe section in a threaded connection, wherein a step surface is disposed on the periphery of the bottom of the straight pipe section, an external thread is disposed on the step surface, an annular protrusion is disposed on the periphery of the top of the bottom plate 402, and an internal thread is disposed on the inner wall of the annular protrusion. In order to ensure flatness of the outer peripheral surface of the impact plate portion 4, the outer peripheral surface of the straight pipe section and the outer peripheral surface of the bottom plate 402 are arranged coplanar in the present embodiment.
The impact plate 403 is slidably mounted in the impact housing 401 through a guide groove structure, specifically, four guide grooves 405 are provided on the inner wall of the straight pipe section of the impact housing 401 in this embodiment, and the four guide grooves 405 are all provided to extend in the up-down direction. In order to avoid the impact plate 403 from falling out of the opening structure, each guide groove 405 is a blind groove in this embodiment, i.e., the top of each guide groove 405 is not through the top surface of the impact housing 401. In order to facilitate the installation of the striking plate 403, the bottom end of each guide groove 405 in this embodiment is connected to the bottom end surface of the straight pipe section. In one-to-one correspondence with the guide grooves 405, in the present embodiment, four guide blocks 408 are provided on the outer peripheral side of the striking plate 403, the four guide blocks 408 are provided at equal intervals along the outer peripheral side of the striking plate 403, and any two adjacent guide blocks 408 are spaced apart by 90 °, and correspondingly, in the present embodiment, the four guide grooves 405 of the striking housing 401 are also provided at equal intervals along the circumferential direction. In this embodiment, the impingement plate 403 is inserted into the straight tube section from the bottom thereof, and the four guide blocks 408 are inserted into the corresponding guide grooves 405 respectively during the insertion process.
In order to avoid the problem of storing accumulated water in the impact housing 401, a plurality of water outlet holes 406 are uniformly distributed on the outer peripheral side of the straight pipe section in the present embodiment. In addition, still equipartition is a plurality of holes 407 of permeating water on impingement plate 403 in this embodiment, and the hole 407 of permeating water can supply water to flow into in impact shell 401, and the water of keeping in that is located between impingement plate 403 and bottom plate 402 also can have certain cushioning effect to the direct circumstances of striking impact plate portion 4 of rivers has been avoided.
The impact plate 403 is in a circular plate shape in this embodiment, and in other embodiments, the impact plate 403 may be in a conical shape, and the smaller end of the impact plate 403 faces the wedge-shaped notch 5. The water flow flowing out from the wedge-shaped cut 5 is divided around the impact plate 403 under the action of the conical structure, so that the impact plate 403 slides up and down more stably, and the direction of the water flow changing the flow direction can be towards each water outlet hole 406.
It should be noted that, in this embodiment, a certain distance is left between the impact-proof plate portion 4 and the deck 6, that is, the impact-proof plate portion 4 is in a suspended state, and because the impact-proof plate portion 4 in this embodiment has a buffering effect, the impact-proof plate portion 4 in other embodiments may also be fixedly connected to the deck 6.
The working process of the invention is as follows: when accumulated water flows into the connecting pipe part 3 along the drain pipe, the accumulated water continues to flow out from the wedge-shaped notch 5 and then directly impacts on the impact plate 403, and the impact plate 403 compresses the elastic piece 404 under the impact action, so that the buffer action is realized. Due to the stop of the impact plate 4, a large part of the water flows out from the wedge-shaped cut-outs 5, and a small part of the water flows through the water-permeable holes 407 into the impact shell 401 and is discharged from the outlet holes 406 of the impact shell 401.
In summary, the embodiment of the present invention provides a drain pipe end device, by using the drain pipe end device of the present invention, the accumulated water flowing along the connecting pipe portion 3 can impact on the impact-proof plate portion 4, thereby avoiding the situation that the water flow directly impacts on the deck 6 or the bulkhead 1. Because the connecting pipe part 3 is provided with the wedge-shaped notch 5, water flow is directly discharged from the wedge-shaped notch 5, so that the problem that the distance between the impact-proof plate and the tail end of the drain pipe is too small to influence the water discharge in the prior art is solved; because the impact-proof plate part 4 and the connecting pipe part 3 are integrally arranged, no gap interval exists between the impact-proof plate part 4 and the connecting pipe part 3, and the noise of water flow impact is reduced; the integral arrangement of the connecting tube portion 3 and the impact-resistant plate portion 4 also avoids the problem of easy loss of the impact-resistant plate. In addition, the impact prevention plate part 4 comprises an impact shell 401, an impact plate and an elastic part 404 are installed in the impact shell 401, and the impact action of water flow can be buffered due to the arrangement of the impact plate 403 and the elastic part 404, so that the situation that the water flow directly collides with the impact prevention plate part 4 in an impact manner is avoided.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a dredge terminal device of sewer pipe which characterized in that: the shock-proof connecting pipe comprises a connecting pipe part (3) and a shock-proof plate part (4) which are integrally arranged, wherein a hanging bracket mechanism (2) is arranged on the connecting pipe part (3), and the hanging bracket mechanism (2) is used for fixedly connecting the connecting pipe part (3) with a bulkhead (1); the bottom end of the connecting pipe part (3) is provided with a wedge-shaped notch (5), and the impact-proof plate part (4) is fixedly connected below the wedge-shaped notch (5); the impact-proof plate part (4) comprises an impact shell (401), one side, facing the wedge-shaped notch (5), of the impact shell (401) is of an open structure, an impact plate (403) is assembled in the impact shell (401) in a guiding and sliding mode, an elastic piece (404) is arranged between the impact plate (403) and the shell bottom of the impact shell (401), and the elastic piece (404) is used for pushing the impact plate (403) to the position of the open structure; water outlet holes (406) are uniformly distributed on the side wall of the impact shell (401); a plurality of water permeable holes (407) are uniformly distributed in the impact plate (403), the impact shell (401) comprises a straight pipe section and a bottom plate (402), and the bottom plate (402) is sealed and fixed at the bottom of the straight pipe section.
2. The drain pipe end device of claim 1, wherein: the impact plate (403) is slidably and guided in the impact shell (401) through a guide groove structure, the guide groove structure comprises a guide groove (405) and a guide block (408), one of the guide groove (405) and the guide block (408) is arranged on the inner wall of the impact shell (401), and the other guide groove is arranged on the outer periphery side of the impact plate (403).
3. The drain pipe end device of claim 2, wherein: the guide groove (405) is arranged on the inner wall of the impact shell (401), the guide groove (405) is a blind groove, and the guide groove (405) is used for preventing one side facing the opening structure from being communicated with the outer surface of the impact shell (401).
4. The drain pipe end device of claim 3, wherein: the impact shell (401) is arranged in a split mode, the impact shell (401) comprises a straight pipe section and a bottom plate (402), and the bottom plate (402) is assembled at the bottom of the straight pipe section in a threaded mode.
5. The drain pipe end device of claim 4, wherein: the guide groove (405) is used for penetrating through one end of the bottom plate (402) and the bottom end face of the straight pipe section.
6. The drain pipe end device of claim 4, wherein: the guide groove structure is multiple and arranged at equal intervals along the circumferential direction of the impact shell (401).
7. The drain pipe end device of claim 1, wherein: setting the height of the wedge-shaped notch (5) as H, setting the diameter of the connecting pipe part (3) as DN, and when DN is not more than 50mm, setting the height H of the wedge-shaped notch (5) to be not less than 40 mm; when DN is greater than 50mm, the height of wedge-shaped notch (5) is not less than DN.
8. The drain pipe end device of claim 1, wherein: the length of the connecting pipe part (3) is between 300mm and 500 mm.
9. The drain pipe end device of claim 1, wherein: the impact plate (403) is in a conical structure, and one end of the impact plate (403) with a smaller size faces one side of the wedge-shaped notch (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010310194.0A CN111425690B (en) | 2020-04-17 | 2020-04-17 | End device of drainage pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010310194.0A CN111425690B (en) | 2020-04-17 | 2020-04-17 | End device of drainage pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111425690A CN111425690A (en) | 2020-07-17 |
| CN111425690B true CN111425690B (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010310194.0A Active CN111425690B (en) | 2020-04-17 | 2020-04-17 | End device of drainage pipe |
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| Country | Link |
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| CN (1) | CN111425690B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6188093A (en) * | 1984-10-05 | 1986-05-06 | 日本工材株式会社 | Flow-velocity buffer pipe water channel |
| CN202783697U (en) * | 2012-09-14 | 2013-03-13 | 上海外高桥造船有限公司 | Deck drainage device |
| CN206347241U (en) * | 2016-12-16 | 2017-07-21 | 中国电子系统工程第二建设有限公司 | A kind of modified three-way pipe |
| CN209870669U (en) * | 2019-05-09 | 2019-12-31 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Marine dredging and draining pipe |
| CN210050449U (en) * | 2019-05-30 | 2020-02-11 | 内蒙古大唐国际托克托第二发电有限责任公司 | Pipeline gas-liquid mixed water hammer reducer |
-
2020
- 2020-04-17 CN CN202010310194.0A patent/CN111425690B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6188093A (en) * | 1984-10-05 | 1986-05-06 | 日本工材株式会社 | Flow-velocity buffer pipe water channel |
| CN202783697U (en) * | 2012-09-14 | 2013-03-13 | 上海外高桥造船有限公司 | Deck drainage device |
| CN206347241U (en) * | 2016-12-16 | 2017-07-21 | 中国电子系统工程第二建设有限公司 | A kind of modified three-way pipe |
| CN209870669U (en) * | 2019-05-09 | 2019-12-31 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Marine dredging and draining pipe |
| CN210050449U (en) * | 2019-05-30 | 2020-02-11 | 内蒙古大唐国际托克托第二发电有限责任公司 | Pipeline gas-liquid mixed water hammer reducer |
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| Publication number | Publication date |
|---|---|
| CN111425690A (en) | 2020-07-17 |
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Application publication date: 20200717 Assignee: Zhanjiang Nanhai Shipbuilding High tech Service Co.,Ltd. Assignor: CSSC HUANGPU WENCHONG SHIPBUILDING Co.,Ltd. Contract record no.: X2023980048822 Denomination of invention: A drainage pipe end device Granted publication date: 20211130 License type: Common License Record date: 20231130 |