CN113048321B - Automatic quick plugging device of deep sea damaged pipe - Google Patents
Automatic quick plugging device of deep sea damaged pipe Download PDFInfo
- Publication number
- CN113048321B CN113048321B CN202110365770.6A CN202110365770A CN113048321B CN 113048321 B CN113048321 B CN 113048321B CN 202110365770 A CN202110365770 A CN 202110365770A CN 113048321 B CN113048321 B CN 113048321B
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000013535 sea water Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
An automatic and rapid plugging device for a deep sea damaged pipe comprises a first underwater platform pressure-resistant shell and a second underwater platform pressure-resistant shell which are spaced, wherein the first underwater platform pressure-resistant shell and the second underwater platform pressure-resistant shell are connected through a deep sea pipeline, a pressure-resistant ring is installed outside the deep sea pipeline, a disc base is installed outside the deep sea pipeline below the pressure-resistant ring, a first spring is installed between the bottom of the pressure-resistant ring and the disc base, and the first spring is wound outside the deep sea pipeline; the second underwater platform pressure shell is provided with a hose storage box, a high-pressure steel wire reinforced hose is stored in the hose storage box, the outer end face of the disc base is further provided with a hose restraint device, one end of the high-pressure steel wire reinforced hose extends out of the hose storage box and enters a deep sea pipeline, and the other end of the high-pressure steel wire reinforced hose sequentially passes through the hose storage box and the hose restraint device and then extends into the pressure ring and is welded and fixed with the pressure ring, so that the operation is reliable.
Description
Technical Field
The invention relates to the technical field of deep sea equipment, in particular to an automatic and rapid deep sea damaged pipe plugging device suitable for an underwater platform.
Background
Due to factors such as processing defects, corrosion and working environment, when the deep sea of the underwater platform is damaged, high-pressure seawater has extremely high impact strength and entry speed, equipment is damaged by flushing if the high-pressure seawater is light, and a large number of water inlet boats in the cabin are sunken and killed if the high-pressure seawater is heavy; the deep sea pipeline of the underwater platform is directly related to the safety of the whole underwater platform, and the plugging process of the deep sea pipeline is time-consuming. Therefore, in the process of equipment development, effective control measures must be taken to realize leakage stoppage of damaged pipelines so as to improve the safety of the underwater platform.
At present, the plugging of underwater damaged pipelines mainly depends on a way of closing a side valve, namely, a deep sea pipeline side valve, a depth meter and other sensors are arranged in a pressure-resistant shell, when the deep sea pipeline is damaged, the side valve is manually or automatically closed to realize the plugging of the deep sea pipeline, and the response time of a system is long; meanwhile, as the submergence depth of the underwater platform increases, a high-pressure-resistant side valve needs to be developed, and the side valve, pipeline accessories and the like have large sizes, so that great difficulty is brought to arrangement of an underwater platform cabin. In the conventional automatic plugging method, expensive deep sea sensors, drivers and other devices need to be equipped to realize real-time monitoring, damage positioning and automatic plugging, so that larger economic and load burden is added to the whole boat system. Deep submergence equipment is not all operated in deep sea state, and still considerable operating time is in shallow sea area. The seawater pressure is low in a shallow sea state, the water inflow speed and the impact strength of water flow after the seawater is damaged are greatly weakened, the requirement on the response time of manual plugging is low, and the equipment is not required to be started. Therefore, in order to avoid the situation that the plugging device is mistakenly opened in shallow sea application and waste is generated, the opening depth of the automatic plugging function is required to be adjusted.
Disclosure of Invention
The applicant aims at the defects in the prior art and provides an automatic and rapid plugging device for a deep sea damaged pipe, so that stepless adjustment of the opening depth of a plugging function can be realized, and the working reliability is greatly improved.
The technical scheme adopted by the invention is as follows:
an automatic and rapid plugging device for a deep sea damaged pipe comprises a first underwater platform pressure-resistant shell and a second underwater platform pressure-resistant shell which are spaced, wherein the first underwater platform pressure-resistant shell and the second underwater platform pressure-resistant shell are connected through a deep sea pipeline, a pressure-resistant ring is installed outside the deep sea pipeline, a disc base is installed outside the deep sea pipeline below the pressure-resistant ring, a first spring is installed between the bottom of the pressure-resistant ring and the disc base, and the first spring is wound outside the deep sea pipeline; the second underwater platform pressure shell is provided with a hose storage box, a high-pressure steel wire reinforced hose is stored in the hose storage box, the outer end face of the disc base is further provided with a hose restraint device, one end of the high-pressure steel wire reinforced hose extends out of the hose storage box and enters a deep sea pipeline, and the other end of the high-pressure steel wire reinforced hose sequentially passes through the hose storage box and the hose restraint device and then extends into the pressure ring and is welded and fixed with the pressure ring.
The further technical scheme is as follows:
and the pressure ring and the deep sea pipeline are sealed through a first sealing washer and a second sealing washer.
The hose storage tank is welded on the second underwater platform pressure shell.
A rotating shaft is arranged in the hose storage box, and a high-pressure steel wire reinforced hose is wound on the rotating shaft.
The disc base is welded outside the deep sea pipeline.
The structure of the hose restraint device is as follows: including hose restraint device shell, threaded hole is opened to the one end of hose restraint device shell, and the other end top is provided with the hole of leading to the sea, threaded hole department cooperation is installed the threaded rod, the one end of threaded rod stretches out hose restraint device shell to install twist grip, the other end of threaded rod stretches into inside hose restraint device shell to connect first piston, the inside second piston that corresponds with first piston of still installing of hose restraint device shell, install the second spring between first piston and the second piston, pass high-pressure steel wire reinforcing hose between the outer end of second piston and the hose restraint device shell internal face.
The hose restraint housing is a hollow rectangular structure.
The outer end face of the shell of the hose restraint device is welded with the disc base.
High-pressure gas in the cylinder is arranged between the first piston and the second piston.
The invention has the following beneficial effects:
the invention has compact and reasonable structure and convenient operation, the deep sea pipeline and the liquid cavity in the pressure ring are communicated by adopting the high-pressure steel wire reinforced hose, when the deep sea pipeline is damaged, the internal pressure of the pressure ring rises, the internal and external pressure difference is reduced, the pressing force between the pressure ring and the pipeline is reduced, the provided friction force cannot prevent the spring from bouncing, the spring pushes the pressure ring to move to the damaged position, the rapid automatic plugging is realized, the safety of the pipeline is effectively ensured, and the opening depth of the automatic plugging function can be adjusted in an electrodeless way in order to avoid the mistaken opening of the shallow sea plugging function.
Meanwhile, the invention also has the following advantages:
(1) the invention has simple structure, reliable work and convenient installation, and provides a new method and a new device for plugging the deep sea pipeline damage.
(2) The automatic plugging device has the advantages of small equipment size, convenience in installation, short response time and the like, and has important significance for improving the safety of the underwater platform.
(3) Manual intervention is not needed, the damaged position is automatically found after the damage, and the quick automatic plugging is realized;
(4) is not influenced by the depth of the seawater and is suitable for the full depth of the sea.
(5) The opening depth of the automatic plugging function can be adjusted in an electrodeless way;
(6) the equipment is simple, and expensive deep sea monitoring sensors, drivers and the like do not need to be equipped.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 is a partially enlarged view of a portion B in fig. 1.
Fig. 4 is a schematic view of the construction of the hose restraint of the present invention.
Fig. 5 is a state diagram after automatic occlusion according to the present invention.
FIG. 6 is a structural diagram of the system response after breakage according to the present invention.
Wherein: 1. a deep sea pipeline;
201. a first underwater platform pressure shell; 202. a second underwater platform pressure shell;
3. a pressure ring; 4. a high pressure steel wire reinforced hose; 5. a hose restraint; 6. a disc base;
701. a first sealing gasket; 702. a second sealing gasket;
8. a hose storage tank;
901. a first spring; 902. a second spring;
10. a hose restraint housing; 11. high-pressure gas in the cylinder;
12. a second piston;
13. sea-going holes;
14. a first piston;
15. a threaded rod; 16. a threaded hole; 17. rotating the handle; 18. and (6) breakage of the pipeline.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 6, the automatic fast plugging device for deep sea damaged pipe of the present embodiment includes a first underwater platform pressure-resistant housing 201 and a second underwater platform pressure-resistant housing 202 which are spaced apart from each other, the first underwater platform pressure-resistant housing 201 and the second underwater platform pressure-resistant housing 202 are connected through a deep sea pipeline 1, a pressure-resistant ring 3 is installed outside the deep sea pipeline 1, a disc base 6 is installed outside the deep sea pipeline 1 below the pressure-resistant ring 3, a first spring 901 is installed between the bottom of the pressure-resistant ring 3 and the disc base 6, and the first spring 901 is wound outside the deep sea pipeline 1; the second underwater platform pressure shell 202 is provided with a hose storage box 8, a high-pressure steel wire reinforced hose 4 is stored in the hose storage box 8, the outer end face of the disc base 6 is further provided with a hose restraint device 5, one end of the high-pressure steel wire reinforced hose 4 extends out of the hose storage box 8 to enter the deep sea pipeline 1, and the other end of the high-pressure steel wire reinforced hose sequentially passes through the hose storage box 8 and the hose restraint device 5, extends into the pressure ring 3 and is welded and fixed with the pressure ring 3.
The pressure ring 3 and the deep sea pipeline 1 are sealed through a first sealing gasket 701 and a second sealing gasket 702.
Hose storage tank 8 is welded to second subsea platform pressure hull 202.
A rotating shaft is arranged in the hose storage box 8, and a high-pressure steel wire reinforced hose 4 is wound on the rotating shaft.
The disc base 6 is welded to the outside of the deep sea pipeline 1.
The hose restraint 5 is constructed as follows: the hose restraint device comprises a hose restraint device shell 10, a threaded hole 16 is formed in one end of the hose restraint device shell 10, a sea through hole 13 is formed in the upper portion of the other end of the hose restraint device shell 10, a threaded rod 15 is installed at the position of the threaded hole 16 in a matched mode, one end of the threaded rod 15 extends out of the hose restraint device shell 10, a rotating handle 17 is installed, the other end of the threaded rod 15 extends into the hose restraint device shell 10 and is connected with a first piston 14, a second piston 12 corresponding to the first piston 14 is further installed inside the hose restraint device shell 10, a second spring 902 is installed between the first piston 14 and the second piston 12, and a high-pressure steel wire reinforced hose 4 penetrates through the position between the outer end of the second piston 12 and the inner wall face of the hose restraint device shell 10.
The hose restraint housing 10 is of hollow rectangular configuration.
The outer end face of the hose restraint housing 10 is welded to the disc base 6.
A cylinder high-pressure gas 11 is provided between the first piston 14 and the second piston 12.
The specific structure and function of the invention are as follows:
the device mainly comprises a deep sea pipeline 1, an underwater platform pressure shell, a pressure ring 3, a high-pressure steel wire reinforced hose 4, a hose restraint device 5, a hose storage box 8, a first spring 901 and a second spring 902.
The upper end of the first spring 901 is supported on the pressure ring 3, the lower end is supported on the disc base 6, and the disc base 6 is welded on the deep sea pipeline 1.
The hose restraint device 5 is welded on the disc base 6 and used for restraining the movement of the high-pressure wire reinforced hose 4.
The upper part of the high-pressure steel wire reinforced hose 4 extends into the pressure ring 3 and is welded and fixed with the pressure ring 3, the lower part of the high-pressure steel wire reinforced hose passes through the hose restraint device 5 and then enters the hose storage box 8, the hose restraint device extends out of the hose storage box 8 and finally extends into the deep sea pipeline 1, and liquid communication between the inside of the pressure ring 3 and the inside of the deep sea pipeline 1 is realized.
Meanwhile, the hose storage tank 8 is welded to the second underwater platform pressure casing 202.
The pressure ring 3 and the deep sea pipeline 1 are sealed through a first sealing gasket 701 and a second sealing gasket 702.
The hose restraint 5 is shown in fig. 4 and comprises a hose restraint housing 10, a first piston 14, a second piston 12, a cylinder pressurized gas 11, a second spring 902, a threaded rod 15 and a rotatable handle 17.
The rotating handle 17 is welded on the threaded rod 15, the end part of the threaded rod 15 is welded with the first piston 14, and the threaded rod 15 is connected on the threaded hole 16. The second piston 12 and the first piston 14 form a high pressure cylinder therebetween, and the cylinder high pressure gas 11 and the second spring 902 are provided therein.
The second piston 12 squeezes the high pressure wire reinforced hose 4 to the hose restraint housing 10 and external seawater enters the interior of the hose restraint 5 through the sea chest 13.
In the actual use process:
a) and adjusting the pretightening force of the spring.
Before deep submergence, the rotating handle 17 is rotated to drive the threaded rod 15 to rotate, the threaded rod is supported by the threaded hole 16, the second piston 12 moves downwards, the pressure of the high-pressure gas 11 in the cylinder and the tension of the second spring 902 are reduced, and finally the pressing force of the first piston 14 on the high-pressure steel wire reinforced hose 4 is reduced, so that the high-pressure steel wire reinforced hose 4 can freely enter and exit the hose restraint device 5.
After the proper length of the high-pressure steel wire reinforced hose 4 between the hose restraint device 5 and the pressure ring 3 is adjusted, the rotating handle 17 is reversely adjusted, so that the high-pressure steel wire reinforced hose 4 is pressed and restrained. At this time, the first spring 901 generates a certain pre-tightening force.
b) Setting and stepless adjusting of the opening depth of the damaged pipe plugging function.
When the cable is submerged to a certain depth, the seawater pressure increases and is higher than the pressure of the high-pressure gas 11 in the cylinder of the cable reel, and the first piston 14 moves down to compress the second spring 902 and the high-pressure gas 11 in the cylinder. The extrusion force of the second piston 12 on the high-pressure steel wire reinforced hose 4 is reduced, the friction force is reduced or even disappears, at the moment, the high-pressure steel wire reinforced hose 4 can freely enter and exit, and the restriction force of the hose restriction device 5 on the high-pressure steel wire reinforced hose 4 disappears. The tensile force of the high-pressure steel wire reinforced hose 4 to the pressure ring 3 is reduced to zero, and at the moment, the automatic damaged pipe plugging function is started.
Before submergence, the initial position of the first piston 14 is changed by adjusting the rotary handle 17, the initial state setting of the pressure of the high-pressure gas 11 in the cylinder and the compression degree of the spring is realized, and the opening of the automatic blocking function at a specific depth can be realized. The first piston 14 can be adjusted to any position through the screw mechanism, and stepless adjustment of the opening depth of the plugging function can be realized.
c) And (5) realizing the plugging function.
Before submerging to the opening depth of the damaged pipe plugging function, the high-pressure steel wire reinforced hose 4 is restrained by the hose restraining device 5 and pulls the pressure ring 3, and the first spring 901 cannot push the pressure ring 3.
After the underwater vehicle dives to the opening depth of the broken pipe plugging function, the hose restraint device 5 loosens the restraint of the hose, and the high-pressure steel wire reinforced hose 4 can freely stretch out and draw back. However, at this time, the seawater pressure P1 is already large, much greater than the liquid pressure P0 inside the deep sea pipeline 1, as shown in FIG. 1. Under the effect of the communication of the high-pressure steel wire reinforced hose 4, the pressure in the liquid cavity inside the pressure ring 3 is the same as the pressure in the deep sea pipeline 1, so that the seawater pressure is greater than the liquid pressure inside the pressure ring 3, and pressing force is generated. Under the action of the pressure force, the spring cannot overcome the friction force between the pressure ring 3 and the deep sea pipeline 1. After the hose is relaxed, the pressure ring 3 remains in a constant position.
When a pipeline breakage occurs, as shown in fig. 5, high-pressure seawater floods the inside of the deep sea pipeline 1 and enters the inside of the pressure ring 3 through the high-pressure wire reinforced hose 4. The internal and external pressures of the pressure ring 3 are balanced, and the pressure and the friction force on the deep sea pipeline 1 are greatly reduced. The resistance of the spring is also greatly reduced and the pressure ring 3 can be loosened and bounced. When the pressure ring 3 travels to the pipeline failure 18, the failure is wrapped by the pressure ring 3, as shown in figure 6. At this time, the high-pressure seawater cannot flow into the deep sea pipeline 1, the internal pressure returns to the original low-pressure state, and the pressure difference between the inside and the outside of the pressure ring 3 is reestablished. The pressure of the pressure ring 3 on the deep sea pipeline 1 is recovered, enough friction force is generated to overcome the elastic force of the spring, at the moment, the spring cannot continuously bounce, the position of the pressure ring 3 is fixed, and automatic plugging is realized at the damaged position.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (9)
1. The utility model provides an automatic quick plugging device of deep sea damaged pipe, includes the first withstand voltage casing of platform (201) and the second withstand voltage casing of platform (202) under water of spaced, its characterized in that: the first underwater platform pressure-resistant shell (201) and the second underwater platform pressure-resistant shell (202) are connected through a deep sea pipeline (1), a pressure-resistant ring (3) is installed outside the deep sea pipeline (1), a disc base (6) is installed outside the deep sea pipeline (1) below the pressure-resistant ring (3), a first spring (901) is installed between the bottom of the pressure-resistant ring (3) and the disc base (6), and the first spring (901) is wound outside the deep sea pipeline (1); install hose storage box (8) on platform pressure casing (202) under water of second, high-pressure steel wire reinforcing hose (4) have been stored in hose storage box (8), hose restraint device (5) are still installed to the outer terminal surface of disc base (6), in high-pressure steel wire reinforcing hose (4) one end stretches out entering deep sea pipeline (1) from hose storage box (8), the other end stretches into behind hose storage box (8), hose restraint device (5) inside pressure ring (3) in proper order to with pressure ring (3) welded fastening.
2. The automatic and rapid deep-sea damaged pipe plugging device according to claim 1, wherein: the pressure ring (3) and the deep sea pipeline (1) are sealed through a first sealing gasket (701) and a second sealing gasket (702).
3. The automatic and rapid deep-sea damaged pipe plugging device according to claim 1, wherein: the hose storage box (8) is welded on the second underwater platform pressure shell (202).
4. The automatic and rapid deep-sea damaged pipe plugging device according to claim 1, wherein: a rotating shaft is arranged in the hose storage box (8), and a high-pressure steel wire reinforced hose (4) is wound on the rotating shaft.
5. The automatic and rapid deep-sea damaged pipe plugging device according to claim 1, wherein: the disc base (6) is welded outside the deep sea pipeline (1).
6. The automatic and rapid deep-sea damaged pipe plugging device according to claim 1, wherein: the hose restraint device (5) is structured as follows: comprises a hose restraint device shell (10), one end of the hose restraint device shell (10) is provided with a threaded hole (16), a sea through hole (13) is arranged above the other end, a threaded rod (15) is arranged at the threaded hole (16) in a matching way, one end of the threaded rod (15) extends out of the shell (10) of the hose restraint device, and a rotating handle (17) is arranged, the other end of the threaded rod (15) extends into the shell (10) of the hose restraint device, and connected to the first piston (14), a second piston (12) corresponding to the first piston (14) being further mounted inside the hose restraint housing (10), a second spring (902) is arranged between the first piston (14) and the second piston (12), the high-pressure steel wire reinforced hose (4) penetrates between the outer end of the second piston (12) and the inner wall surface of the hose restraint device shell (10).
7. The automatic and rapid deep-sea damaged pipe plugging device according to claim 6, wherein: the hose restraint housing (10) is of a hollow rectangular configuration.
8. The automatic and rapid deep-sea damaged pipe plugging device according to claim 6, wherein: the outer end face of the hose restraint device shell (10) is welded with the disc base (6).
9. The automatic and rapid deep-sea damaged pipe plugging device according to claim 6, wherein: a cylinder high-pressure gas (11) is arranged between the first piston (14) and the second piston (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110365770.6A CN113048321B (en) | 2021-04-06 | 2021-04-06 | Automatic quick plugging device of deep sea damaged pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110365770.6A CN113048321B (en) | 2021-04-06 | 2021-04-06 | Automatic quick plugging device of deep sea damaged pipe |
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| Publication Number | Publication Date |
|---|---|
| CN113048321A CN113048321A (en) | 2021-06-29 |
| CN113048321B true CN113048321B (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110365770.6A Active CN113048321B (en) | 2021-04-06 | 2021-04-06 | Automatic quick plugging device of deep sea damaged pipe |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1600550A1 (en) * | 1966-05-17 | 1970-02-05 | Parker Hannifin Corp | Device for connecting two mutually movable fluid lines |
| CN201218385Y (en) * | 2008-06-20 | 2009-04-08 | 宝山钢铁股份有限公司 | Under-pressure leak-stopping apparatus for energy resource medium pipe |
| CN103210260A (en) * | 2010-11-19 | 2013-07-17 | 瑞泰控股公司 | Pliable-wall air ducts with internal expanding structures |
| CN208605694U (en) * | 2018-07-25 | 2019-03-15 | 天津天润达科技有限公司 | A kind of self-balancing steady flow control valve |
| CN212003472U (en) * | 2020-04-23 | 2020-11-24 | 正丰阀门集团有限公司 | Water pump control valve with protection function |
-
2021
- 2021-04-06 CN CN202110365770.6A patent/CN113048321B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1600550A1 (en) * | 1966-05-17 | 1970-02-05 | Parker Hannifin Corp | Device for connecting two mutually movable fluid lines |
| CN201218385Y (en) * | 2008-06-20 | 2009-04-08 | 宝山钢铁股份有限公司 | Under-pressure leak-stopping apparatus for energy resource medium pipe |
| CN103210260A (en) * | 2010-11-19 | 2013-07-17 | 瑞泰控股公司 | Pliable-wall air ducts with internal expanding structures |
| CN208605694U (en) * | 2018-07-25 | 2019-03-15 | 天津天润达科技有限公司 | A kind of self-balancing steady flow control valve |
| CN212003472U (en) * | 2020-04-23 | 2020-11-24 | 正丰阀门集团有限公司 | Water pump control valve with protection function |
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| Publication number | Publication date |
|---|---|
| CN113048321A (en) | 2021-06-29 |
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