CN110822170A - Water intaking end stable structure and contain sea water piping system of this structure - Google Patents
Water intaking end stable structure and contain sea water piping system of this structure Download PDFInfo
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- CN110822170A CN110822170A CN201911149584.8A CN201911149584A CN110822170A CN 110822170 A CN110822170 A CN 110822170A CN 201911149584 A CN201911149584 A CN 201911149584A CN 110822170 A CN110822170 A CN 110822170A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 171
- 239000013535 sea water Substances 0.000 title claims abstract description 19
- 238000006073 displacement reaction Methods 0.000 claims abstract description 98
- 230000005484 gravity Effects 0.000 claims abstract description 53
- 230000000670 limiting effect Effects 0.000 claims abstract description 45
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 238000010248 power generation Methods 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 abstract description 13
- 238000009991 scouring Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 4
- 238000011900 installation process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/123—Devices for the protection of pipes under water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
- F03G7/05—Ocean thermal energy conversion, i.e. OTEC
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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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/20—Accessories therefor, e.g. floats, weights
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Biodiversity & Conservation Biology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Oceanography (AREA)
- Sustainable Development (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a water taking end stabilizing structure and a seawater pipeline system comprising the same.A gravity block lifts a water taking vertical pipe away from a seabed to a water taking depth, so that a water taking port is prevented from contacting the seabed to take water from the surface of the seabed, more silt is absorbed, and the filtering capacity of a water taking end filter is increased; the axial displacement of the pipeline is limited by combining the negative displacement limiter and the positive displacement limiting pad, so that the pipeline and the gravity block are combined together, and the water intake pipe is prevented from being separated from the gravity block under the action of ocean currents and waves. The large-amplitude swing of the water taking end of the pipeline is limited under the self gravity action of the gravity block, the in-place stability of the water taking port of the pipeline is controlled, and the scouring action of ocean currents and waves on the water taking end of the vertical pipe is reduced; increase the holistic stability of intake pipe through the straight line pipeline section of being buried underground, the protection is buried underground the section pipeline and is not received the scouring action of ocean current, wave, has concurrently and separates with the continuous both sides pipeline section of straight line pipeline section, weakens the mutual transmission of vibrations load, promotes deep sea water intake pipe way steadiness.
Description
Technical Field
The invention belongs to the technical field of ocean engineering, and particularly relates to a water taking end stabilizing structure and a seawater pipeline system comprising the same.
Background
The concept of ocean temperature difference power generation was first proposed in 1881 by J.D' Arsonval, France. Namely, the temperature difference between the surface layer and the deep layer of the seawater is utilized to generate electricity. However, for a long time thereafter, the development has once fallen into a standstill due to the rather small power of the ocean thermoelectric generation. In recent years, with the rising of global crude oil price and the increasing of environmental pollution, the development of clean and renewable energy is urgent, and therefore, ocean thermoelectric power generation becomes a hot spot of scientific interest again.
In the process of generating power by using ocean temperature difference energy, the temperature difference between the warm seawater and the cold seawater is above 20 ℃, and electrostatic force can be generated. In subtropical and most areas of tropical zones, the temperature of the surface layer of the ocean is generally 27-29 ℃, the temperature of the seawater is continuously reduced along with the increase of the depth, the change range of the water temperature below 800m is small, the temperature is basically maintained at 4-6 ℃, and the cold seawater is generally extracted from the depth below the sea level by 600-1000 m to reach the temperature difference. Therefore, a significant cost of ocean thermoelectric power generation is the deep water intake facility. Under the condition that a vertical pipe for pumping cold water is far away from a coast and the middle section of the pipeline is not fixedly supported, the degree of freedom of the pipeline is very high, and the pipeline is easy to generate vortex-induced vibration under the scouring action of ocean currents, waves and internal flows, so that the fatigue damage of the pipeline is caused, and the normal operation of the whole system is influenced.
Therefore, in engineering, a gravity anchor is arranged at a water taking port of the pipeline to control the pipeline to swing greatly and reduce the degree of freedom of a pipe end, and a buoyancy block is arranged to lift the pipeline away from a seabed to a water taking depth. Although the control measures of the in-place stability of the gravity anchor and the buoyancy block limit the large-amplitude swing of the pipeline to a certain degree, the water intake of the cold water pipe cannot be completely restricted, the pipeline still has large degree of freedom under the action of various loads in the ocean, and the in-place stability of the pipeline is not greatly improved.
Therefore, aiming at the problem that the water taking end of the marine thermoelectric power generation vertical pipe has overlarge freedom degree and overcoming the defects of the existing protection measures, the invention provides the in-place stable control structure of the water taking end of the marine thermoelectric power generation vertical pipe, which is formed by the combined action of the U-shaped laying mode of the marine thermoelectric cold water pipe and the multifunctional gravity block.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a water taking end stabilizing structure and a seawater pipeline system comprising the same. The stable structure can lift the water taking end of the water taking pipe away from the seabed to the water taking depth; meanwhile, the in-position stability of the water taking end of the pipeline is controlled, and the water taking end is prevented from swinging greatly; the integral stability of the water taking pipe in the ocean is improved by embedding the linear pipe sections, and the embedded pipeline is protected from being scoured by ocean currents and waves; has the characteristics of obviously improving the stability of the water taking pipe and having simple structure.
The invention is realized by the following technical scheme:
a stable structure of a water taking end comprises a gravity block, a positive displacement limiting pad and a negative displacement limiter;
a through stepped clamping groove is formed in the gravity block, the stepped clamping groove comprises a plurality of groove bodies which are connected in the radial direction and have the same length, the inner diameter of each groove body is uniformly increased from the water inlet end to the other end, a water taking pipe penetrates through the stepped clamping groove, and the inner diameter (the minimum inner diameter) of the stepped clamping groove is larger than the outer diameter of the water taking pipe, so that an annular gap is formed between the water taking pipe and the stepped clamping groove;
be provided with positive displacement limiting pad and negative displacement limiter on the intake pipe:
the positive displacement limiting pad is sleeved on the pipe wall of the water taking pipe through a connecting ring, and is positioned on one side of the gravity block opposite to the water taking port when the water taking pipe is installed in the stepped clamping groove of the gravity block, and a water through hole is formed in the position, opposite to the annular gap, of the positive displacement limiting pad;
the negative displacement limiter is arranged in a circle around the water taking pipe at equal intervals as a group, and a plurality of groups are arranged along the radial direction of the water taking pipe and comprise a displacement limiter base, a bolt and a displacement limiting handle, wherein the displacement limiting handle is arranged on the displacement limiter base through the bolt and is vertical to the outer wall of the water taking pipe; through the matching between the stepped clamping groove and the negative displacement limiter arranged in the annular gap, the tail end of the water taking pipe is limited, and the water taking pipe and the gravity block are structurally independent.
In the above technical solution, the number of the water passage holes is 6 to 12.
In the technical scheme, the negative displacement limiter is provided with 6-15 groups along the water intake pipe.
In the technical scheme, 6-10 negative displacement limiters are arranged along the pipe wall of the water intake pipe in each group.
A seawater pipeline system comprising a water taking end stabilizing structure comprises a water taking pipe, a filtering device and the water taking end stabilizing structure;
the upper end of the water intake pipe is communicated with the ship-type offshore thermoelectric power generation system, a part of the middle section of the water intake pipe is embedded in a soil layer of the seabed, and a water intake port of the water intake pipe is provided with a filtering device;
the water taking end stabilizing structure comprises a gravity block, a positive displacement limiting pad and a negative displacement limiter;
a through stepped clamping groove is formed in the gravity block, the stepped clamping groove comprises a plurality of groove bodies which are connected in the radial direction and have the same length, the inner diameter of each groove body is uniformly increased from the water inlet end to the other end, a water taking pipe penetrates through the stepped clamping groove, and the inner diameter (the minimum inner diameter) of the stepped clamping groove is larger than the outer diameter of the water taking pipe, so that an annular gap is formed between the water taking pipe and the stepped clamping groove;
be provided with positive displacement limiting pad and negative displacement limiter on the intake pipe:
the positive displacement limiting pad is sleeved on the pipe wall of the water taking pipe through a connecting ring, and is positioned on one side of the gravity block opposite to the water taking port when the water taking pipe is installed in the stepped clamping groove of the gravity block, and a water through hole is formed in the position, opposite to the annular gap, of the positive displacement limiting pad;
the negative displacement limiter surrounds the intake pipe with the equidistance interval and sets up the round as a set of, radially is provided with a plurality of groups along the intake pipe, including displacement limiter base, bolt and displacement restriction handle, the displacement restriction handle passes through the bolt to be installed on moving the limiter base, the displacement restriction handle is mutually perpendicular with the outer wall of intake pipe.
In the technical scheme, the filtering device is a coarse grating, and the aperture of the grating is 30-50 cm.
In the technical scheme, the diameter of the water intake pipe is 1-3 meters.
In the above technical solution, the length of the water intake pipe is 1000-2000 m.
In the technical scheme, the depth of the middle section of the water intake pipe embedded in the soil layer of the seabed is 2-3 meters.
In the technical scheme, the length of the soil layer buried in the seabed at the middle section of the water intake pipe is 400-500 meters.
The invention has the advantages and beneficial effects that:
in the invention, the multifunctional gravity block lifts the water taking vertical pipe away from the seabed to a water taking depth, so that a water taking port is prevented from contacting the seabed to take water from the surface of the seabed, more silt is absorbed, and the filtering capacity of a water taking end filter is increased; the invention limits the axial displacement of the pipeline by combining the negative displacement limiter arranged at the water taking end of the pipeline and the positive displacement limiting pad, combines the pipeline and the gravity block together and avoids the water taking pipe from separating from the gravity block under the action of ocean currents and waves. The large-amplitude swing of the water taking end of the pipeline is limited under the self gravity action of the gravity block, the in-place stability of the water taking port of the pipeline is controlled, and the scouring action of ocean currents and waves on the water taking end of the vertical pipe is reduced; the U-shaped pipe laying mode increases the overall stability of the water intake pipe through the embedded linear pipe sections, protects the pipeline of the embedded section from scouring action of ocean currents and waves, and has the functions of separating the pipe sections at two sides connected with the linear pipe sections, weakening mutual transmission of vibration loads and greatly improving the stability of the deep cold seawater low-temperature remote transportation pipeline; the invention has simple structure and can realize land prefabrication.
Drawings
FIG. 1 is a schematic diagram of a seawater pipeline system including a water intake end stabilizing structure according to the present invention.
Fig. 2 is a sectional structural view of a water intake end stabilizing structure according to the present invention.
FIG. 3 is a schematic cross-sectional view of a riser with a negative displacement limiter according to the present invention.
Fig. 4 is a partial structural diagram of the negative displacement limiter of the present invention.
Fig. 5 is a schematic perspective view of the positive displacement limiting pad of the present invention.
FIG. 6 is a schematic front plan view of the positive displacement limiting pad of the present invention.
Fig. 7 is a schematic view (one) of the installation process of the negative displacement limiter of the present invention.
Fig. 8 is a schematic view (two) of the installation process of the negative displacement limiter of the present invention.
Fig. 9 is a schematic view (three) of the installation process of the negative displacement limiter of the present invention.
FIG. 10 is a schematic view of a coarse grid filtering device at a water intake of the present invention.
Wherein: 1. a floating ocean thermal energy conversion system; 2. a mixing water outlet; 3. a straight pipe section of the water intake pipe; 4. a multifunctional gravity block; 5. a negative displacement limiter; 6. a filter; 7. a water intake pipe; 8. a displacement limiter base; 9. a bolt; 10. a displacement restricting handle; 11. a positive displacement limiting pad; 12. a water through hole; 13. a connecting ring; 14. stepped clamping grooves.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
Examples
The seawater pipeline system with the water taking end stable structure mainly comprises a multifunctional gravity block and a U-shaped water taking pipe in a laying mode, and is shown in figure 1. The multifunctional gravity block lifts the pipeline away from the seabed to the water taking depth, and the embedding depth of the multifunctional gravity block is determined by the strength of seabed soil, the stress balance of the gravity block and other factors, so that the stability of the gravity block and the water taking end of the pipeline can be kept to the optimal depth. The size of the multifunctional gravity block is determined by the diameter of the water taking pipe, the depth of water taking, the embedding depth of the gravity block, the load borne by the water taking pipe and other factors, so that the water taking end of the pipeline and the self stability of the gravity block can be ensured to be the optimal size. The height of the opening (stepped clamping groove) of the gravity block is determined by the water taking depth and the embedding depth of the gravity block; the diameter of the hole is slightly smaller than the sum of the diameter of the water taking pipe and the height of the axial limiting device.
The end of the water intake pipe is provided with a negative displacement limiting device for controlling the negative axial displacement of the water intake pipe, as shown in fig. 3 and 4. The negative displacement limiting device is provided with 6-15 groups which are distributed at equal intervals along the pipe end of the water intake pipe, each group consists of 6-10 displacement limiters which are uniformly arranged along the outer wall of the water intake pipe, a displacement limiter base is welded on the outer wall of the pipe end, a displacement limiting handle is connected on the displacement limiting base through a bolt, and the displacement limiting handle is ensured to rotate freely. The inner wall of the opening hole of the multifunctional gravity block is made into a displacement limiting groove, the curvature of the displacement limiting groove is consistent with that of the displacement limiting handle, and when the pipeline moves in the negative direction, the displacement of the pipeline can be limited. Meanwhile, in order to limit the forward movement of the pipeline, a forward displacement limiting pad is arranged at the water taking end of the pipeline, as shown in fig. 5. The connecting ring of the displacement limiting pad is welded at the water taking end of the pipeline, so that the pipeline is connected with the displacement limiting pad, 6-12 water through holes are formed in the displacement limiting pad, the distance from the farthest end of each water through hole to the circle center of the displacement limiting pad is slightly smaller than the radius of the hole opening of the gravity block, normal circulation of seawater in the opening hole of the multifunctional gravity block is guaranteed, and the phenomenon that the seawater cannot normally circulate in the gravity block and cause overlarge impact on the displacement limiting pad to cause the pipeline to be separated from the displacement limiting pad is avoided. The welding position and the size of the displacement limiting pad are determined by the size of the gravity block, the length of the pipeline entering the hole and the load borne by the water taking end.
The U-shaped pipe laying mode in the seawater pipeline system comprising the water taking end stable structure can comprehensively improve the overall stability of the marine water taking pipe, and the distance from the linear pipeline of the embedded section to the water taking position is shortened by embedding part of the water taking pipe in the seabed to provide a fixed support for the pipelines at two sides connected with the embedded pipe section, and the pipeline water taking end is controlled to be in-place stability together with the multifunctional gravity block. Wherein, the embedding depth and the embedding length of the pipeline are determined by the load borne by the pipeline.
In the above example, the intake pipe has a diameter of 0.8m, the depth of intake is 800m below sea level, which is 800m from the sea bed. The size of the multifunctional gravity block is determined by the diameter of the water taking pipe, the depth of water taking, the embedding depth of the gravity block, the load size of the water taking end of the water taking pipe and other factors, and in the embodiment, the height of the multifunctional gravity block is 3.5m, the length is 2m, the width is 2m, and the embedding depth is 1 m. The height of the opening is determined by the water taking depth, and the distance from the center of the opening to the bottom of the gravity block is 2.3m in the embodiment. In order to limit the negative displacement of the water intake pipe, 10 sets of displacement limiting devices are provided in the example, and each set consists of 8 displacement limiters. The distance between the displacement limiters was 0.17m and its height was 0.15 m. When the water taking pipe moves reversely, the displacement limiting handle is clamped at the groove of the water taking pipe, and the limiting effect is achieved. The diameter of the hole is slightly smaller than the sum of the height of the axial limiter and the diameter of the water taking pipe, and the diameter of the hole is 1.0m in the example. In order to restrict the forward displacement of the water intake pipe, a forward displacement restricting pad is provided in this example, the displacement restricting pad having a thickness of 0.05m and a diameter of 1.7m, the center of the water passage hole being spaced apart from the displacement restricting pad by a distance of 0.45m, and the diameter of the water passage hole being 0.08 m. After the water intaking pipe is installed, when the water intaking pipe generates positive axial displacement, the positive displacement limiting pad is clamped at the displacement position of the hole and cannot move, and the limiting effect is realized. In order to greatly improve the stability of the ocean temperature difference energy cold water intake pipe, part of the intake pipe is buried in the seabed, the burying depth and the burying length are determined by various factors such as the load borne by the ocean intake pipe, and the like, in the embodiment, the burying depth of the cold water pipe is 1.5m, and the burying length of the pipeline is 300 m.
The length and the embedding depth of the water taking pipe embedding section and the size of the multifunctional gravity block are the keys for controlling the in-place stability of the water taking end of the vertical pipe. The fixed support is provided for the pipe sections at two sides connected with the linear pipe section through the linear pipe section buried in the seabed; meanwhile, the embedded part of the linear pipeline is protected from scouring action of ocean current, waves and internal waves; the distance between the seabed and the water taking position is shortened, the degree of freedom of the water taking end of the vertical pipe can be greatly reduced under the combined action of the seabed and the multifunctional gravity block, the phenomenon that the pipeline greatly swings is avoided, and the on-site stability of the water taking end of the pipeline is obviously improved.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. The utility model provides a water intaking holds stable structure which characterized in that: comprises a gravity block, a positive displacement limiting pad and a negative displacement limiter;
a through stepped clamping groove is formed in the gravity block, the stepped clamping groove comprises a plurality of groove bodies which are connected in the radial direction and have the same length, the inner diameter of each groove body is uniformly increased from the water inlet end to the other end, a water taking pipe penetrates through the stepped clamping groove, and the inner diameter of the stepped clamping groove is larger than the outer diameter of the water taking pipe, so that an annular gap is formed between the water taking pipe and the stepped clamping groove;
be provided with positive displacement limiting pad and negative displacement limiter on the intake pipe:
the positive displacement limiting pad is sleeved on the pipe wall of the water taking pipe through a connecting ring, and is positioned on one side of the gravity block opposite to the water taking port when the water taking pipe is installed in the stepped clamping groove of the gravity block, and a water through hole is formed in the position, opposite to the annular gap, of the positive displacement limiting pad;
the negative displacement limiter surrounds the intake pipe with the equidistance interval and sets up the round as a set of, radially is provided with a plurality of groups along the intake pipe, including displacement limiter base, bolt and displacement restriction handle, the displacement restriction handle passes through the bolt to be installed on moving the limiter base, the displacement restriction handle is mutually perpendicular with the outer wall of intake pipe.
2. The water intake end stabilizing structure according to claim 1, wherein: the number of the water through holes is 6-12.
3. The water intake end stabilizing structure according to claim 1, wherein: and 6-15 groups of the negative displacement limiters are arranged along the water intake pipe.
4. The water intake end stabilizing structure according to claim 1, wherein: and 6-10 negative displacement limiters are arranged along each group of the pipe wall of the water intake pipe.
5. A seawater pipeline system comprising a water taking end stabilizing structure comprises a water taking pipe, a filtering device and the water taking end stabilizing structure;
the upper end of the water intake pipe is communicated with the ship-type offshore thermoelectric power generation system, a part of the middle section of the water intake pipe is embedded in a soil layer of the seabed, and a water intake port of the water intake pipe is provided with a filtering device;
the water taking end stabilizing structure comprises a gravity block, a positive displacement limiting pad and a negative displacement limiter;
a through stepped clamping groove is formed in the gravity block, the stepped clamping groove comprises a plurality of groove bodies which are connected in the radial direction and have the same length, the inner diameter of each groove body is uniformly increased from the water inlet end to the other end, a water taking pipe penetrates through the stepped clamping groove, and the inner diameter of the stepped clamping groove is larger than the outer diameter of the water taking pipe, so that an annular gap is formed between the water taking pipe and the stepped clamping groove;
be provided with positive displacement limiting pad and negative displacement limiter on the intake pipe:
the positive displacement limiting pad is sleeved on the pipe wall of the water taking pipe through a connecting ring, and is positioned on one side of the gravity block opposite to the water taking port when the water taking pipe is installed in the stepped clamping groove of the gravity block, and a water through hole is formed in the position, opposite to the annular gap, of the positive displacement limiting pad;
the negative displacement limiter surrounds the intake pipe with the equidistance interval and sets up the round as a set of, radially is provided with a plurality of groups along the intake pipe, including displacement limiter base, bolt and displacement restriction handle, the displacement restriction handle passes through the bolt to be installed on moving the limiter base, the displacement restriction handle is mutually perpendicular with the outer wall of intake pipe.
6. The water intake end stabilizing structure according to claim 1, wherein: the filtering device is a thick grating, and the aperture of the grating is 30-50 cm.
7. The water intake end stabilizing structure according to claim 1, wherein: the diameter of the water intake pipe is 1-3 meters.
8. The water intake end stabilizing structure according to claim 1, wherein: the length of the water taking pipe is 1000-2000 m.
9. The water intake end stabilizing structure according to claim 1, wherein: the depth of the middle section of the water intake pipe embedded in the soil layer of the seabed is 2-3 meters.
10. The water intake end stabilizing structure according to claim 1, wherein: the length of the soil layer buried in the seabed at the middle section of the water taking pipe is 400-500 meters.
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| US20100086363A1 (en) * | 2008-10-07 | 2010-04-08 | Chevron U.S.A. Inc. | Device for protecting a subsea structure and methods relating to same |
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| CN110397093A (en) * | 2019-07-08 | 2019-11-01 | 天津大学 | A kind of negative pressure control apparatus and its application method of adjustable bucket foundation sinking rate |
| CN211475060U (en) * | 2019-11-21 | 2020-09-11 | 天津大学 | Water intaking end stable structure and contain sea water piping system of this structure |
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