CN111997127A - Suction backfill device for trencher - Google Patents
Suction backfill device for trencher Download PDFInfo
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- CN111997127A CN111997127A CN202010891356.4A CN202010891356A CN111997127A CN 111997127 A CN111997127 A CN 111997127A CN 202010891356 A CN202010891356 A CN 202010891356A CN 111997127 A CN111997127 A CN 111997127A
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- pipe
- suction
- trencher
- backfill
- mud
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
- E02F5/12—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with equipment for back-filling trenches or ditches
- E02F5/125—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with equipment for back-filling trenches or ditches underwater
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention provides a suction backfill device for a trencher, which is used for completing suction backfill work of silt after underwater trenching and soil breaking, and comprises the following components: several underwater centrifugal pumps, water pipeline, jet-flow suction device and backfill device. The jet flow suction device consists of a mud suction pipe, a hydraulic cylinder, a water delivery pipe and a jet pump. The water inlet pipe of the jet pump is connected with the trencher frame through a bolt, and the water suction pipe, the water inlet pipe, the mixing chamber and the throat pipe of the jet pump are connected through flanges; the backfill device comprises a hydraulic cylinder, a connecting pipe and a diffusion pipe; one end of a connecting pipe of the backfilling device is connected with a throat pipe of the jet flow suction device, and the other end of the connecting pipe is connected with a diffusion pipe. The invention has simple structure, simple operation and high reliability, integrates the mud suction and backfill work, thereby improving the work efficiency, saving the work cost and simultaneously improving the work efficiency.
Description
Technical Field
The invention relates to a submarine trencher, in particular to a mud suction backfilling device for the submarine trencher, belonging to the field of offshore oil engineering.
Background
With the continuous exploitation of submarine petroleum resources, the protection work of submarine pipelines is crucial, and the protection of pipelines is generally carried out by burying after ditching by a trencher.
The pumping mud raising system is a key part of the submarine trencher, and directly influences the operating efficiency, the service performance, the construction operation cost, the economic benefit and the like of the trencher. The mud and sand deposited in the ditches after ditching are timely discharged out of the operation area through a pumping mud raising system, so that the bed surface below the sea pipe forms a required ditch shape, and the sea pipe slowly sinks under the action of gravity; then the silt is backfilled by the aid of equipment such as seawater action or a backfilling plough, and the sea pipe is deeply managed below the mud surface.
At present, although the seabed trencher has various styles such as a jet flow type and a mechanical type, most of the seabed trencher only has a trenching function, although soil is discharged to two sides through a pumping mud raising system, if backfilling is needed, other equipment or natural backfilling is needed. The addition of equipment such as a backfilling plough results in lower operating efficiency of the trencher, long working period and high operating cost. The natural backfill period is long, the backfill is insufficient, partial pipelines are easy to expose outside, and potential safety hazards exist.
Therefore, it is necessary to develop a device that can make a trencher have a backfill function.
Disclosure of Invention
The invention aims to provide a mud backfilling device of a submarine suction trencher, which can integrate the trenching and backfilling of the submarine into a whole, so that the trenching operation and the backfilling operation of the submarine trencher can be simultaneously carried out, the operating efficiency of the trencher is greatly improved, and the operating cost is saved.
The purpose of the invention is realized as follows: the device comprises a mud suction pipe, a water inlet pipe, a mixing chamber, a throat pipe, a connecting pipe and a diffusion pipe which are sequentially connected, wherein the water inlet pipe is fixedly connected with a rack of the trencher, a suction device hydraulic cylinder is arranged between the mud suction pipe and the rack of the trencher, a backfill device hydraulic cylinder is arranged between the diffusion pipe and the rack of the trencher, an underwater centrifugal pump is also arranged on the rack of the trencher, and the underwater centrifugal pump is connected with the water inlet pipe.
The invention also includes such structural features:
1. the sludge suction pipe is L-shaped, and a hinged support welded on the short end of the L shape is hinged with a push rod of a hydraulic cylinder of the suction device; the short end is connected with the inner side of the pressing end cover through a bearing, and the pressing end cover is connected with the water suction pipe through a bolt; when the device works, the hydraulic cylinder of the suction device pushes the mud suction pipe to rotate, so that the mud suction pipe rotates from a recovery position to a working position, the long end of the mud suction pipe is inserted into mud in a gully, and the mud suction pipe returns to the recovery position when the operation is finished.
2. The connecting pipe is L-shaped, one end of the connecting pipe is connected with the throat pipe through a flange, the other end of the connecting pipe is connected with the inner side of the pressing end cover through a bearing, and the pressing end cover is connected with the diffusion pipe through a bolt; the hinged support welded on the diffusion pipe is hinged with one end of a reversing hinge, and the other end of the reversing hinge is hinged with a hydraulic cylinder push rod of the backfilling device; when the device works, the hydraulic cylinder of the backfilling device pushes the diffusion pipe to rotate, so that the diffusion pipe rotates from the recovery position to the working position, and then returns to the recovery position after the operation is finished.
3. The water suction pipe, the water inlet pipe, the mixing chamber, the throat pipe and the connecting pipe are connected through flanges.
4. The suction backfill devices are arranged in two groups and are symmetrically arranged at the bottom of the trencher.
Compared with the prior art, the invention has the beneficial effects that: by adopting the technical scheme, the suction backfill device can be matched with the injection system of the trencher, so that sludge is sucked up while the trencher performs trenching operation, and the pipeline laying effect is prevented from being influenced by sludge deposited in a trench; meanwhile, sludge pumped by the pumping and backfilling device is discharged from the backfilling device through the connecting pipe, and the laid pipeline is buried, so that the problem that the trencher cannot be backfilled is solved. When backfilling works, the backfilling distance can be accurately controlled by controlling the angle of the backfilling mechanism, so that the backfilling soil can uniformly and completely cover the pipeline, the safety of the pipeline can be protected to a greater extent, and the resistance of the pipeline to damage caused by changes of external environmental factors is improved. The invention realizes the integration of the ditching and backfilling work of the submarine pipeline, thereby avoiding the additional addition of equipment such as a backfilling plough and the like in the engineering, greatly improving the working efficiency of the ditcher and saving the cost.
Drawings
FIG. 1 is an overall assembly view of the mud suction backfill mechanism of the present invention;
FIG. 2 is a schematic structural view of a jet suction device and a backfill device according to the present invention;
in the figure: 1-jet suction means; 1.1-a mud suction pipe; 1.2-suction device hydraulic cylinder; 1.3-a suction pipe; 1.4-water inlet pipe; 1.5-a mixing chamber; 2-a backfilling device; 2.1-connecting tube; 2.2-diffusion tube; 2.3-backfilling device hydraulic cylinder; 3-water conveying pipe; 4-an underwater centrifugal pump; 5-trencher frame.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
With reference to fig. 1 to 2, a mud suction and backfill mechanism of a submarine trencher comprises a jet flow suction device 1, a backfill device 2, a water conveying pipeline 3 and an underwater centrifugal pump 4. The jet flow suction device comprises a mud suction pipe, a hydraulic cylinder, a water delivery pipe and a jet pump. The water inlet pipe of the jet pump is connected with the frame through a bolt; the water suction pipe, the water inlet pipe, the mixing chamber and the throat pipe are connected through flanges; the backfill device comprises a hydraulic cylinder, a connecting pipe and a diffusion pipe, wherein one end of the connecting pipe of the backfill device is connected with a throat pipe of the jet flow suction device, and the other end of the connecting pipe of the backfill device is connected with the diffusion pipe.
The jet flow suction device 1 consists of a mud suction pipe 1.1, a suction device hydraulic cylinder 1.2, a water suction pipe 1.3, a water inlet pipe 1.4, a mixing chamber 1.5 and a throat pipe 1.6; the suction device 2 consists of a connecting pipe 2.1, a diffusion pipe 2.2 and a backfilling device hydraulic cylinder 2.3.
The water inlet pipe 1.4 of the jet flow suction device 1 is connected with the frame 5 through a bolt; the water suction pipe 1.3, the water inlet pipe 1.4, the mixing chamber 1.5 and the throat pipe 1.6 are connected through flanges; one end of a connecting pipe 2.1 of the backfilling device 2 is connected with a throat pipe 1.5 of the jet flow suction device 1, and the other end is connected with a diffusion pipe 2.2. The mud suction pipe 1.1 is L-shaped: the hinged support welded on the short end is hinged with a push rod of a hydraulic cylinder 1.2 of the suction device; the short end is connected with the inner side of the pressing end cover through a bearing, and the pressing end cover is connected with the water suction pipe 1.3 through a bolt. During operation, the suction device hydraulic cylinder 1.2 pushes the suction pipe 1.1 to rotate, so that the suction pipe 1.1 rotates from the recovery position to the working position, and the long end of the suction pipe is inserted into slurry in a gully. At the end of the operation the suction pipe 1.1 is returned to the recovery position. The connecting pipe is L-shaped, and one end of the connecting pipe is connected with the throat pipe 1.6 through a flange; the other end is connected with the inner side of a pressing end cover through a bearing, and the pressing end cover is connected with a diffusion pipe 2.2 through a bolt; a hinged support welded on the diffusion pipe 2.2 is hinged with one end of a reversing hinge, and the other end of the reversing hinge is hinged with a push rod of a hydraulic cylinder 2.3 of the backfilling device; when the device works, the hydraulic cylinder 2.3 of the backfilling device pushes the diffusion pipe 2.2 to rotate, so that the diffusion pipe 2.2 rotates from the recovery position to the working position, and then returns to the recovery position after the operation is finished.
The mud suction backfilling device is arranged below the tail part of the trencher and symmetrically distributed at the left side and the right side.
The submersible pump 4 is a centrifugal submersible pump, is connected to the middle of the rack of the trencher through bolts and is distributed in a bilateral symmetry mode.
The hydraulic cylinder 1.2 of the suction device is arranged on a lateral rear beam of the trencher frame and is distributed symmetrically left and right.
The cylinder body 2.3 of the backfilling device is arranged on a beam in the middle of the tail of the trencher and is distributed symmetrically left and right.
The working principle of the invention is as follows:
when the device works, working fluid is provided with a power source by the submersible centrifugal pump 4 arranged on the rack 5 of the trencher, and enters the mixing chamber 1.5 by the water inlet pipe 1.4 of the jet pump after passing through the water conveying pipeline 3. The high-speed working fluid entering the mixing chamber 1.5 creates a negative pressure in the mixing chamber 1.5 and the mud flow mixture is sucked from the suction pipe 1.3 of the jet pump into the mixing chamber 1.5 through the suction pipe 1.1. Subsequently, the working fluid and the sucked fluid are fully mixed in the throat 1.6 and momentum exchange is carried out, so that the kinetic energy of the sucked fluid is increased. The well mixed slurry enters the backfilling device from the throat through a connecting pipe 2.1. Finally, the slurry is discharged through the diffuser pipe 2.2, where most of the kinetic energy is converted into pressure energy. The discharged slurry falls on the ditch bed to finish the backfilling work.
In summary, the invention provides a mud suction backfilling device of a submarine trencher, which is used for completing the mud suction backfilling work after underwater trenching and soil breaking, and comprises: several underwater centrifugal pumps, water pipeline, jet-flow suction device and backfill device. The jet flow suction device consists of a mud suction pipe, a hydraulic cylinder, a water delivery pipe and a jet pump. The water inlet pipe of the jet pump is connected with the trencher frame through a bolt, and the water suction pipe, the water inlet pipe, the mixing chamber and the throat pipe of the jet pump are connected through flanges; the backfill device comprises a hydraulic cylinder, a connecting pipe and a diffusion pipe; one end of a connecting pipe of the backfilling device is connected with a throat pipe of the jet flow suction device, and the other end of the connecting pipe is connected with a diffusion pipe. The invention has simple structure, simple operation and high reliability, integrates the mud suction and backfill work, thereby improving the work efficiency, saving the work cost and simultaneously improving the work efficiency.
Claims (9)
1. A suction backfill apparatus for a trencher, characterized by: the device comprises a mud suction pipe, a water inlet pipe, a mixing chamber, a throat pipe, a connecting pipe and a diffusion pipe which are sequentially connected, wherein the water inlet pipe is fixedly connected with a rack of the trencher, a suction device hydraulic cylinder is arranged between the mud suction pipe and the rack of the trencher, a backfill device hydraulic cylinder is arranged between the diffusion pipe and the rack of the trencher, an underwater centrifugal pump is also arranged on the rack of the trencher, and the underwater centrifugal pump is connected with the water inlet pipe.
2. The suction backfill apparatus for a trencher as claimed in claim 1, wherein: the sludge suction pipe is L-shaped, and a hinged support welded on the short end of the L shape is hinged with a push rod of a hydraulic cylinder of the suction device; the short end is connected with the inner side of the pressing end cover through a bearing, and the pressing end cover is connected with the water suction pipe through a bolt; when the device works, the hydraulic cylinder of the suction device pushes the mud suction pipe to rotate, so that the mud suction pipe rotates from a recovery position to a working position, the long end of the mud suction pipe is inserted into mud in a gully, and the mud suction pipe returns to the recovery position when the operation is finished.
3. A suction backfill device for a trencher as claimed in claim 1 or claim 2, characterised in that: the connecting pipe is L-shaped, one end of the connecting pipe is connected with the throat pipe through a flange, the other end of the connecting pipe is connected with the inner side of the pressing end cover through a bearing, and the pressing end cover is connected with the diffusion pipe through a bolt; the hinged support welded on the diffusion pipe is hinged with one end of a reversing hinge, and the other end of the reversing hinge is hinged with a hydraulic cylinder push rod of the backfilling device; when the device works, the hydraulic cylinder of the backfilling device pushes the diffusion pipe to rotate, so that the diffusion pipe rotates from the recovery position to the working position, and then returns to the recovery position after the operation is finished.
4. A suction backfill device for a trencher as claimed in claim 1 or claim 2, characterised in that: the water suction pipe, the water inlet pipe, the mixing chamber, the throat pipe and the connecting pipe are connected through flanges.
5. A suction backfill device for a trencher as claimed in claim 3 wherein: the water suction pipe, the water inlet pipe, the mixing chamber, the throat pipe and the connecting pipe are connected through flanges.
6. A suction backfill device for a trencher as claimed in claim 1 or claim 2, characterised in that: the suction backfill devices are arranged in two groups and are symmetrically arranged at the bottom of the trencher.
7. A suction backfill device for a trencher as claimed in claim 3 wherein: the suction backfill devices are arranged in two groups and are symmetrically arranged at the bottom of the trencher.
8. The suction backfill apparatus for a trencher as claimed in claim 4, wherein: the suction backfill devices are arranged in two groups and are symmetrically arranged at the bottom of the trencher.
9. The suction backfill apparatus for a trencher as claimed in claim 5, wherein: the suction backfill devices are arranged in two groups and are symmetrically arranged at the bottom of the trencher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010891356.4A CN111997127A (en) | 2020-08-30 | 2020-08-30 | Suction backfill device for trencher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010891356.4A CN111997127A (en) | 2020-08-30 | 2020-08-30 | Suction backfill device for trencher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111997127A true CN111997127A (en) | 2020-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010891356.4A Pending CN111997127A (en) | 2020-08-30 | 2020-08-30 | Suction backfill device for trencher |
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| Country | Link |
|---|---|
| CN (1) | CN111997127A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2473228A1 (en) * | 1980-01-08 | 1981-07-10 | Tim Tech Ind Minieres | DEVICE FOR LAYING UNDERWATER CABLES |
| WO2005005736A2 (en) * | 2003-07-04 | 2005-01-20 | Saipem S.P.A. | Trenching apparatus and method |
| CN202401497U (en) * | 2012-01-12 | 2012-08-29 | 中国石油天然气集团公司 | Underwater sludge discharge device |
| CN203808133U (en) * | 2014-02-19 | 2014-09-03 | 中国海洋石油总公司 | Underwater secondary ditching device |
| CN105201032A (en) * | 2015-11-11 | 2015-12-30 | 中国石油大学(华东) | Double-plough body suspended span submarine pipeline ditching and backfilling equipment |
| CN108019564A (en) * | 2017-12-02 | 2018-05-11 | 东北石油大学 | Water-jet formula seabed ditching pipe laying robot |
| CN109024741A (en) * | 2018-09-28 | 2018-12-18 | 大连理工大学 | A kind of modularization seabed ditcher |
| CN211340919U (en) * | 2019-10-12 | 2020-08-25 | 中港疏浚有限公司 | Submarine pipeline back-trenching flushing jet pump |
-
2020
- 2020-08-30 CN CN202010891356.4A patent/CN111997127A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2473228A1 (en) * | 1980-01-08 | 1981-07-10 | Tim Tech Ind Minieres | DEVICE FOR LAYING UNDERWATER CABLES |
| WO2005005736A2 (en) * | 2003-07-04 | 2005-01-20 | Saipem S.P.A. | Trenching apparatus and method |
| CN202401497U (en) * | 2012-01-12 | 2012-08-29 | 中国石油天然气集团公司 | Underwater sludge discharge device |
| CN203808133U (en) * | 2014-02-19 | 2014-09-03 | 中国海洋石油总公司 | Underwater secondary ditching device |
| CN105201032A (en) * | 2015-11-11 | 2015-12-30 | 中国石油大学(华东) | Double-plough body suspended span submarine pipeline ditching and backfilling equipment |
| CN108019564A (en) * | 2017-12-02 | 2018-05-11 | 东北石油大学 | Water-jet formula seabed ditching pipe laying robot |
| CN109024741A (en) * | 2018-09-28 | 2018-12-18 | 大连理工大学 | A kind of modularization seabed ditcher |
| CN211340919U (en) * | 2019-10-12 | 2020-08-25 | 中港疏浚有限公司 | Submarine pipeline back-trenching flushing jet pump |
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Application publication date: 20201127 |