Submarine ditching propelling cutter shaft

Abstract

The utility model discloses a seabed ditching propulsion cutter shaft which comprises a machine frame, a propulsion assembly and a material suction assembly, a fixing block is fixed at the upper end of the machine frame, the propulsion assembly is located at the front end of the machine frame, the propulsion assembly comprises a disc type motor, a propulsion cutter, a fixing protrusion and a guide plate, the disc type motor is arranged at the front end of the fixing block, and the propulsion cutter is arranged at the front end of the fixing block. The left side and the right side of a disc type motor are in interference connection with two sets of propelling cutters, a plurality of sets of fixing protrusions are welded to the outer sides of the propelling cutters, the guiding plate is fixed between the fixing protrusions, and the material sucking assembly is located above the rack and comprises a material sucking opening, a conveying pipe, a circulating pump and a discharging opening. A discharging opening is fixed to the left side of the propelling cutter, and the left end of the discharging opening is fixedly connected with a conveying pipe. By means of the milling cutter excavation mode, the friction force between the plough and the seabed can be prevented from being increased, and therefore rollover is prevented from occurring when the workboat is dragged.

Description

Technical Field

[0001] The utility model relates to the technical field of seabed excavation, in particular to a seabed trenching propulsion cutter shaft. Background Art

[0002] Submarine pipelines may be damaged by deformation, leakage, and fracture during oil and gas transportation. Using a trencher to dig trenches and bury pipelines is the most practical method among many methods. It is simple, convenient, and economically efficient. For example, the patent document with application number CN201420168834.9 discloses a submarine trencher that can break hard submarine rocks with a drill bit, so it can dig trenches anywhere on the seabed. The plow at the tail of the machine can transfer the soil and rocks in the trench to both sides of the trench. It is easy to use and highly adaptable.

[0003] However, in similar solutions mentioned above, when the plow is fully inserted into the seabed, the friction between the plow and the seabed increases, resulting in an increase in the force required for trenching. If the trench is dug by towing an operating vessel, it is prone to capsizing. In addition, the excavated soil accumulates in the excavated trench. With the force of gravity and the flow of seawater, the mud and sand flow back into the trench, requiring further cleaning.

[0004] Therefore, in view of this, the existing structural deficiencies were studied and improved, and a seabed trenching propulsion cutter shaft was proposed. Summary of the invention

[0005] In view of the shortcomings of the prior art, the utility model provides a submarine trenching propulsion cutter shaft, which solves the above-mentioned similar solutions proposed in the above-mentioned background technology. When the plow is fully inserted into the seabed, the friction between the plow and the seabed increases, resulting in an increase in the force required for trenching. If the trench is dug by towing by an operating vessel, it is easy to capsize. In addition, the excavated soil accumulates in the excavated trench. With the gravity and the flow of seawater, the mud and sand flow back into the trench again, resulting in the need for cleaning again.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a submarine trenching propulsion knife shaft, comprising a frame, a propulsion assembly and a suction assembly, a fixed block is fixed on the upper end of the frame, and the propulsion assembly is located at the front end of the frame, and the propulsion assembly comprises a disc motor, a propulsion knife, a fixed protrusion and a guide plate, and the front end of the fixed block is provided with the disc motor, two groups of the propulsion knives are interference-connected on the left and right sides of the disc motor, and several groups of the fixed protrusions are welded on the outside of the propulsion knife, and the guide plate is fixed between several groups of the fixed protrusions, the suction assembly is located above the frame, and the suction assembly comprises a suction port, a conveying pipe, a circulation pump and a discharge port, and the discharge port is fixed on the left side of the propulsion knife, the left end of the discharge port is fixedly connected with the conveying pipe, and the upper end of the conveying pipe is connected with the discharge port, and the outer wall of the conveying pipe is penetrated by the circulation pump, and the disc motor and the circulation pump are both provided with a pressure-resistant and waterproof shell.

[0007] Furthermore, four sets of driving wheels are connected to the left and right sides of the frame, and tracks are arranged on the outer sides of the four sets of driving wheels.

[0008] Furthermore, a support shaft is fixed to the front end of the fixed block, a support rod is hinged to the front end of the support shaft, and a hydraulic rod is hinged to the lower end of the support rod.

[0009] Furthermore, the fixing protrusion and the guide plate are welded to form an integrated structure with the propulsion knife, and the propulsion assembly is hinged to form a rotating structure with the frame.

[0010] Furthermore, the guide plate is arranged in a spiral shape, and the two groups of propulsion knives are arranged symmetrically about the disc motor.

[0011] Furthermore, the suction assembly is symmetrically arranged in two groups about the vertical center line of the frame, and the heights of the two groups of suction ports are parallel to the height of the propulsion knife.

[0012] The utility model provides a submarine trenching propulsion cutter shaft, which has the following beneficial effects:

[0013] By setting up the milling cutter excavation method, the friction between the plow and the seabed can be avoided from increasing, thereby preventing the plough from capsizing when the workboat is towing. In addition, the excavated soil can be cleaned in time to prevent the silt from flowing back into the ditch due to gravity and the flow of seawater, thus avoiding the need for cleaning again. The specific contents are as follows:

[0014] When the device enters the waiting working point, the propulsion assembly is inserted into the seabed and the disc motor is started. The disc motor drives the two sets of propulsion knives to rotate simultaneously, and the mud and sand on the seabed are flushed away through the fixed protrusions on the propulsion knives. At the same time, the circulation pump is started. As the device starts forward, negative pressure is formed at the suction port, and the flushed mud and seawater are discharged from the discharge port, thereby avoiding the reflux of mud and sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the submarine trenching propulsion cutter shaft of the utility model;

[0016] Figure 2 It is a schematic diagram of the top view of the structure of the submarine trenching propulsion cutter shaft of the utility model;

[0017] Figure 3 It is a schematic diagram of the side view structure of the propulsion cutter of the submarine trenching propulsion cutter shaft of the utility model;

[0018] Figure 4 The utility model is a schematic diagram of the connection structure of the fixed block and the propulsion component of the submarine trenching propulsion cutter shaft.

[0019] In the figure: 1, frame; 2, driving wheel; 21, crawler track; 3, fixing block; 31, supporting shaft; 32, supporting rod; 4, propulsion assembly; 401, disc motor; 402, propulsion knife; 403, fixing protrusion; 404, guide plate; 5, hydraulic rod; 6, suction assembly; 601, suction port; 602, conveying pipe; 603, circulation pump; 604, discharge port. Implementation

[0020] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0021] like Figures 1 to 4As shown, the submarine trenching propulsion cutter shaft includes a frame 1, a propulsion assembly 4 and a suction assembly 6. Four sets of driving wheels 2 are connected to the left and right sides of the frame 1, and tracks 21 are arranged on the outer sides of the four sets of driving wheels 2. By arranging the tracks 21 on the outer sides of the driving wheels 2, the contact area between the device and the seabed can be increased, thereby improving the stability of the device to avoid rollover when being towed by an operating vessel, and the device can be moved by itself through the driving wheels 2. A fixed block 3 is fixed to the upper end of the frame 1, a support shaft 31 is fixed to the front end of the fixed block 3, and a support rod 32 is hinged to the front end of the support shaft 31 for improving the stability of the connection of the propulsion assembly 4, and a hydraulic rod 5 is hinged to the lower end of the support rod 32 to provide support for the support rod 32, further improving the stability of the device, and the propulsion assembly 4 is located at the front end of the frame 1. Because the propulsion assembly 4 is hinged to the frame 1 to form a rotating structure, a limiting device can be arranged on the outer side of the hydraulic rod 5 to prevent it from retracting, and then the angle of the propulsion assembly 4 is adjusted by the length of the hydraulic rod 5, thereby adjusting the depth of the excavation trench.

[0022] The propulsion assembly 4 includes a disc motor 401, a propulsion knife 402, a fixed protrusion 403 and a guide plate 404, and the front end of the fixed block 3 is provided with a disc motor 401, the disc motor 401 is small in size and can drive two sets of propulsion knives 402 to rotate at the same time, the left and right sides of the disc motor 401 are connected with two sets of propulsion knives 402 in an interference connection, and the outer side of the propulsion knife 402 is welded with a plurality of fixed protrusions 403, the high-speed rotating fixed protrusions 403 can quickly flush away the mud and sand, which is conducive to improving the excavation speed, and a guide plate 404 is fixed between the plurality of fixed protrusions 403. The plate 404, the fixed protrusion 403 and the guide plate 404 are all welded to form an integrated structure with the thrust blade 402, which improves the toughness of the thrust blade, thereby improving the strength of the device, which is conducive to adapting to harder soil layers. The guide plate 404 is arranged in a spiral shape, and when the thrust blade 402 rotates at a high speed, a small vortex moving inward can be formed through the guide plate 404, which can gather the mud and sand that are flushed away, and the two groups of thrust blades 402 are symmetrically arranged about the disc motor 401, which can limit the flow of mud and sand, and the two groups of thrust blades 402 can further speed up the excavation speed.

[0023] The suction assembly 6 is located above the frame 1, and the suction assembly 6 includes a suction port 601, a conveying pipe 602, a circulation pump 603 and a discharge port 604, and the discharge port 604 is fixed on the left side of the thrust knife 402, and the height of the two groups of suction ports 601 is parallel to the height of the thrust knife 402, so as to facilitate the suction of the flushed mud and sand, and the suction of the mud and sand on both sides of the ditch, causing the structure on both sides of the ditch to become loose, and the left end of the discharge port 604 is fixedly connected with the conveying pipe 602 for transporting mud and sand, and the upper end of the conveying pipe 602 is connected with the discharge port 604, A circulating pump 603 is provided through the outer wall of the conveying pipe 602, and the washed away mud and sand are discharged through the discharge port 604 by the circulating pump 603, so that the excavated soil can be cleaned in time to prevent the mud and sand from flowing back into the ditch again with the flow of gravity and sea water, avoiding the need for cleaning again. The suction assembly 6 is symmetrically arranged with two groups about the vertical center line of the frame 1, which can prevent the washed away mud and sand from accumulating in the ditch, which is beneficial to the rapid transportation of mud and sand. The disc motor 401 and the circulating pump 603 are both provided with pressure-resistant and waterproof shells.

[0024] In summary, when the submarine trenching propulsion cutter shaft is used, first, the propulsion assembly 4 is rotated downward along the support rod 31, thereby driving the hydraulic rod 5 to retract inward to the shortest point, and the device is placed in the working area on the seabed. The crawler 21 is driven to rotate by the driving wheel 2, so that the device travels on the seabed, and the disc motor 401 is started at the same time. The disc motor 401 drives the two sets of propulsion cutters 402 to rotate at the same time. The fixed protrusion 403 on the propulsion cutter 402 can be inserted into the seabed when rotating at high speed, and the mud and sand are thrown backwards. When the thrust blade 402 rotates, it forms two groups of vortices that flow horizontally inward, and the mud and sand gather inward along the vortices, so that the mud and sand on the seabed can be flushed away during the advancement of the thrust blade 402. At the same time, the circulation pump 603 is started, and the stirring paddle inside the circulation pump 603 rotates, so that a negative pressure is formed at the suction port 601. The mud and sand thrown out by the thrust blade directly enters the suction port 601 with the water flow, and flows into the discharge port 604 through the conveying pipe 602, and is finally ejected from the discharge port 604 to avoid the reflux of mud and sand.

Claims

1. A submarine trenching propulsion cutter shaft, comprising a frame (1), a propulsion assembly (4) and a suction assembly (6), characterized in that: A fixing block (3) is fixed to the upper end of the frame (1), and the propulsion assembly (4) is located at the front end of the frame (1), and the propulsion assembly (4) comprises a disc motor (401), a propulsion knife (402), a fixing protrusion (403) and a guide plate (404), and the disc motor (401) is arranged at the front end of the fixing block (3), two groups of the propulsion knives (402) are interference-connected on the left and right sides of the disc motor (401), and a plurality of groups of the fixing protrusions (403) are welded to the outer sides of the propulsion knives (402), and the guide plate (404) is fixed between the plurality of groups of the fixing protrusions (403). The suction assembly (6) is located above the frame (1), and comprises a suction port (601), a conveying pipe (602), a circulation pump (603) and a discharge port (604), and the discharge port (604) is fixed to the left side of the thrust knife (402), the left end of the discharge port (604) is fixedly connected to the conveying pipe (602), and the upper end of the conveying pipe (602) is connected to the discharge port (604), and the circulation pump (603) is provided through the outer wall of the conveying pipe (602), and the disc motor (401) and the circulation pump (603) are both provided with a pressure-resistant and waterproof shell.

2. The submarine trenching propulsion cutter shaft according to claim 1, characterized in that: Four sets of driving wheels (2) are connected to the left and right sides of the frame (1), and tracks (21) are arranged on the outer sides of the four sets of driving wheels (2).

3. The submarine trenching propulsion cutter shaft according to claim 1, characterized in that: A support shaft (31) is fixed to the front end of the fixed block (3), a support rod (32) is hinged to the front end of the support shaft (31), and a hydraulic rod (5) is hinged to the lower end of the support rod (32).

4. The submarine trenching propulsion cutter shaft according to claim 1, characterized in that: The fixing protrusion (403) and the guide plate (404) are welded together with the propulsion blade (402) to form an integrated structure, and the propulsion assembly (4) is hinged together with the frame (1) to form a rotating structure.

5. The submarine trenching propulsion cutter shaft according to claim 4, characterized in that: The guide plate (404) is arranged in a spiral shape, and the two groups of the propulsion knives (402) are arranged symmetrically with respect to the disc motor (401).

6. The submarine trenching propulsion cutter shaft according to claim 5, characterized in that: The material suction components (6) are symmetrically arranged in two groups about the vertical center line of the frame (1), and the heights of the two groups of material suction ports (601) are parallel to the height of the propulsion blade (402).

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