Spraying knife for underwater ditching and ditching robot

Abstract

The invention belongs to the technical field of underwater ditching equipment, and discloses a spraying and flushing knife for underwater ditching and a ditching robot, the spraying and flushing knife comprises two ditching arms and a sliding assembly, the two ditching arms are connected with a transfer assembly, the transfer assembly is connected with a water inlet assembly, and the sliding assembly is mounted on the transfer assembly; the transfer assembly comprises an inner cylinder and an outer cylinder, water inlet holes are formed in the inner cylinder in the circumferential direction, a direct difference exists between the outer cylinder and the inner cylinder, and the sliding assembly is used for driving the outer cylinder to move relative to the inner cylinder; wherein the sliding assembly drives the ditching arm to move in the direction close to the water inlet assembly, and the water outlet pressure of the ditching arm is gradually increased; the sliding assembly drives the trenching arm to be gradually aligned with the water inlet hole of the inner cylinder, the water pressure is dynamically adjusted from low to high, the trenching requirements of different depths and widths are met, the device can adapt to submarine topographies of different hardness degrees, the trenching geology and the trenching depth are adapted by increasing the water pressure, and damage and influence on equipment are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of underwater trenching equipment, in particular to a jetting cutter used for underwater trenching. Background Art

[0002] With the rapid development of marine resource development and underwater engineering construction, underwater trenching equipment has been widely used in the fields of submarine pipeline laying, optical cable laying and submarine mining. In these operations, trenching equipment mainly relies on high-pressure water flow to impact the seabed soil layer to achieve the excavation of the seabed. However, underwater trenching equipment in the prior art has many limitations and is difficult to meet the increasingly complex construction needs.

[0003] In order to have the function of adjusting the trenching depth and width, the existing underwater trenching robots are often set up with more complex equipment structures to adapt to different operations. The more prominent problem is that when the equipment is operating at high intensity, especially in hard terrain or uneven geological conditions, the trenching arm is easily affected by mechanical impact force. Due to uneven force, the trenching arm is prone to wear, deformation and even damage, which greatly shortens the service life of the equipment and increases maintenance costs and operation risks.

[0004] Therefore, a jet cutter and a trenching robot for underwater trenching are proposed to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a jet cutter and a trenching robot for underwater trenching, aiming to solve the problem that the existing trenching equipment has a complex structure and cannot take into account different geological conditions, resulting in a shortened service life of the equipment.

[0006] In order to achieve the above-mentioned invention object, the present invention proposes a jet cutter for underwater trenching, comprising a trenching arm and a sliding assembly, wherein the number of the trenching arms is two, the two trenching arms are both connected to a transfer assembly, the transfer assembly is connected to a water inlet assembly, and the sliding assembly is installed on the transfer assembly;

[0007] The transfer assembly comprises an inner cylinder and an outer cylinder, the inner cylinder is provided with a water inlet hole in the circumferential direction, there is a gap between the outer cylinder and the inner cylinder, and the sliding assembly is used to drive the outer cylinder to move relative to the inner cylinder;

[0008] The sliding assembly drives the trenching arm to move in a direction close to the water inlet assembly, and the water outlet pressure of the trenching arm gradually increases.

[0009] Furthermore, it also includes a rotating assembly arranged on the trenching arm, wherein the rotating assembly is rotatably connected to the trenching arm and is used to drive the trenching arm to perform rotational movement relative to the transfer assembly.

[0010] Furthermore, the rotating assembly includes a rotating cylinder and rotating parts arranged at both ends of the rotating cylinder, and the trenching arm is movably connected to the rotating cylinder through the rotating parts.

[0011] Furthermore, the sliding assembly includes a sliding drive cylinder and a pushing member, one end of the sliding drive cylinder is connected to a frame, and the other end of the sliding drive cylinder is connected to the pushing member, the pushing member is fixedly connected to the outer cylinder, and the sliding drive cylinder drives the outer cylinder to move relative to the inner cylinder through the pushing member.

[0012] Furthermore, the pushing member includes an arc block and a connecting block, the connecting block is provided with a rolling block, the arc block is provided with an arc groove, and the connecting block is slidably connected to the arc groove.

[0013] Furthermore, the arc-shaped block is in the shape of three-quarters of a disk.

[0014] Furthermore, it also includes a regulating valve, which is arranged between the two groups of inner cylinders and is used to control the connection / closing of the two groups of inner cylinders.

[0015] Furthermore, the trenching arm is provided with a mounting lug, and the mounting lug is connected to the rotating member.

[0016] In another embodiment, the present invention provides a trenching robot, which is applied to the jet cutter for underwater trenching in any of the above embodiments, and includes a mounting frame and a fixing member, wherein the sliding assembly is fixedly connected to the trenching robot via the mounting frame, and the rotating assembly is fixedly connected to the trenching robot via the fixing member.

[0017] Beneficial effects:

[0018] A jet cutter for underwater trenching of the present invention comprises a trenching arm and a sliding assembly, wherein the number of trenching arms is two, and both trenching arms are connected to a transfer assembly, the transfer assembly is connected to a water inlet assembly, and the sliding assembly is installed on the transfer assembly; the transfer assembly comprises an inner cylinder and an outer cylinder, the inner cylinder is provided with a water inlet hole in the circumferential direction, a gap is provided between the outer cylinder and the inner cylinder to form a water outlet channel, and the sliding assembly is used to drive the outer cylinder to move relative to the inner cylinder; wherein the sliding assembly drives the trenching arm to move in a direction close to the water inlet assembly to adjust the trenching width; the sliding assembly adjusts the position of the trenching arm through a rotational connection between the outer cylinder and the inner cylinder; the trenching arm can be adapted to seabed terrains of different hardness and softness, and in addition, when dealing with seabed terrains with harder geology, the geology of trenching and trenching depth can be adapted to by increasing water pressure, and this design reduces damage and influence on the equipment and improves the damage resistance and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the overall structure of a jet-cutting knife for underwater trenching according to an embodiment of the present invention;

[0020] Figure 2 is a cross-sectional view of a jet cutter for underwater trenching according to an embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of a jet punch for underwater trenching from another perspective according to an embodiment of the present invention;

[0022] Figure 4 It is a side view of a jet cutter for underwater trenching according to an embodiment of the present invention;

[0023] Figure 5 Schematic diagram of a jet cutter for underwater trenching according to an embodiment of the present invention;

[0024] Figure 6 It is a first partial enlarged view of a jet punch for underwater trenching according to an embodiment of the present invention;

[0025] Figure 7 is a second partial enlarged view of a jet punch for underwater trenching according to an embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of a trenching arm of a jet cutter for underwater trenching in an embodiment of the present invention when it is in an initial position;

[0027] Fig. 9 It is a schematic diagram of a trenching arm of a jet cutter for underwater trenching according to an embodiment of the present invention when it is closest to a water inlet assembly;

[0028] Fig.10 It is a schematic diagram of a trenching arm of a jet cutter for underwater trenching according to an embodiment of the present invention when it is closest to a water inlet assembly;

[0029] Fig.11 It is a schematic diagram of a trenching arm of a jet cutter for underwater trenching in an embodiment of the present invention in an initial position;

[0030] in:

[0031] 100, trenching arm; 110, water outlet pipe; 120, installation lug;

[0032] 200, transfer assembly; 210, inner cylinder; 220, outer cylinder;

[0033] 300, sliding assembly; 310, sliding drive cylinder; 320, arc block; 330, connecting block; 340, rolling block; 350, arc groove;

[0034] 400, rotating assembly; 410, rotating member; 420, vertical cylinder;

[0035] 500, water inlet assembly; 510, water pump; 520, fan blade; 530, water inlet pipe; 540, water inlet;

[0036] 600, regulating valve;

[0037] 700, water inlet hole; 710, gap;

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] Reference Figures 1 to 9 The present invention discloses a jetting cutter for underwater trenching, comprising a trenching arm 100 and a sliding assembly 300. The trenching arms 100 are two in number. Both trenching arms 100 are connected to a transfer assembly 200. The transfer assembly 200 is connected to a water inlet assembly 500. The sliding assembly 300 is installed on the transfer assembly 200.

[0044] The transfer assembly 200 includes an inner cylinder 210 and an outer cylinder 220. The inner cylinder 210 is provided with a water inlet hole 700 in the circumferential direction. The outer cylinder 220 and the inner cylinder 210 are provided with a gap 710 to form a water outlet channel. The sliding assembly 300 is used to drive the outer cylinder 220 to move relative to the inner cylinder 210.

[0045] The sliding assembly 300 drives the trenching arm 100 to move in a direction close to the water inlet assembly 500 to adjust the trenching width.

[0046] The jet cutter for underwater trenching in this embodiment includes a trenching arm 100, a sliding assembly 300, a water inlet assembly 500 and a transfer assembly 200. The number of trenching arms 100 is 2. The trenching arm 100 is provided with a water outlet pipe 110 toward the lower side. The water outlet pipe 110 is provided along the extension direction of the trenching arm 100. The transfer assembly 200 includes an inner cylinder 210 and an outer cylinder 220. The water inlet assembly 500 includes a hydraulic drive, a water pump 510, a fan blade 520 and a water inlet pipe 530. A check valve is provided inside the water pump 510. The water pump 510 is provided with multiple groups of water inlets 540 and filters. Under the action of the hydraulic drive, the fan blade 520 rotates at a high speed, and water enters the water inlet pipe 530 from the outside through the water inlet 540. Among them, the water pump 510 The filter element in the filter can filter out most of the impurities. The setting of the filter element reduces the situation that the water inlet 540 or the water inlet pipe 530 is blocked by magazines. Specifically, the water inlet pipe 530 is connected to the inner cylinder 210, and there is a diameter difference between the outer cylinder 220 and the inner cylinder 210. One end of the sliding component 300 is connected to the outer cylinder 220. The outer cylinder 220 is driven by the sliding component 300 to make a rotation relative to the inner cylinder 210, that is, the outer cylinder 220 moves along the inner cylinder 210 towards / away from the water inlet component 500 under the push of the sliding component 300. The inner cylinder 210 is provided with a plurality of groups of water inlet holes 700 in the circumferential direction. Among them, the water inlet holes 700 are arranged in the middle of the inner cylinder 210. When the trenching arm 100 is in the initial position, that is, it is located On the side away from the water inlet assembly 500, the water inlet hole 700 on the inner cylinder 210 is not directly aligned with the inlet of the trenching arm 100, and the water flow mainly enters the trenching arm 100 through the water outlet channel formed by the gap 710 between the inner cylinder 210 and the outer cylinder 220; when the sliding assembly 300 drives the trenching arm 100 to slide in the direction of the water inlet assembly 500, the water inlet hole 700 on the inner cylinder 210 gradually moves in the direction of the inlet of the trenching arm 100, and as the degree of alignment increases, the water flow path is more direct; when the trenching arm 100 reaches the position closest to the water inlet assembly 500, the water inlet hole 700 of the inner cylinder 210 is completely aligned with the inlet of the trenching arm 100, and the water supply path is the shortest and there is no dispersion loss; the underwater trenching jet chisel of this embodiment passes through the sliding assembly 30 0 drives the trenching arm 100 to move along the sliding path between the inner cylinder 210 and the outer cylinder 220 of the transfer assembly 200, thereby realizing the adjustment of the trenching width and depth at the same time. Specifically, when the sliding assembly 300 drives the trenching arm 100 to move in the direction close to or away from the water inlet assembly 500, the alignment degree between the trenching arm 100 and the water inlet hole 700 of the inner cylinder 210 changes, and then the water flow path gradually changes. When the trenching arm 100 is away from the water inlet assembly 500, the water flow mainly enters the trenching arm 100 through the diameter difference between the inner cylinder 210 and the outer cylinder 220; and when the trenching arm 100 gradually approaches the water inlet assembly 500, the water inlet hole 700 of the inner cylinder 210 is gradually aligned with the entrance of the trenching arm 100, and the water flow path becomes more direct.

[0047] In addition, in order to ensure sealing in this embodiment, sealing rings are provided at the connection between the outer cylinder 220 and the inner cylinder 210 , the connection between the water inlet pipe 530 and the inner cylinder 210 , and the connection between the trenching arm 100 and the outer cylinder 220 .

[0048] This embodiment adjusts the position of the trenching arm 100 through the sliding component 300, which not only realizes the dynamic adjustment of the trenching width, but also further realizes the adjustable control of the trenching depth on the basis of the width adjustment; in addition, the linkage adjustment of the trenching depth and width makes the water flow pressure distribution more uniform, and effectively avoids the damage of the trenching arm 100 caused by excessive local stress; this design is suitable for submarine operations facing hard or complex geological conditions, and can reduce the friction and mechanical impact of the trenching arm 100 by optimizing the water flow path, thereby extending the service life of the equipment, and adapting to the trenching geology and trenching depth by increasing the water pressure. This design reduces the damage and impact on the equipment, improves the equipment's damage resistance and service life, and is suitable for a variety of underwater construction scenarios.

[0049] The jetting knife for underwater trenching further comprises a rotating assembly 400 disposed on the trenching arm 100, wherein the rotating assembly 400 is rotatably connected to the trenching arm 100 and is used to drive the trenching arm 100 to perform a rotational movement relative to the transfer assembly 200;

[0050] The rotating assembly 400 includes a rotating cylinder and rotating members 410 disposed at both ends of the rotating cylinder, and the trenching arm 100 is movably connected to the rotating cylinder via the rotating members 410;

[0051] The trenching arm 100 is provided with a mounting lug 120 , and the mounting lug 120 is connected to the rotating member 410 .

[0052] The rotating cylinder is a vertical cylinder 420. A mounting lug 120 is provided on the trenching arm 100. The lower end of the vertical cylinder 420 is connected to the trenching arm 100 through the mounting lug 120. A rotating member 410 is provided at the connection between the mounting lug 120 and the vertical cylinder 420. The rotating member 410 is connected to the trenching arm 100 through the rotating member 410. A rotating member 410 is also provided at the upper end connection of the vertical cylinder 420. The design of the rotating member 410 enables the vertical cylinder 420 to swing within a certain range when driving the trenching arm 100 to rotate. In this embodiment, the rotating member 410 is a ball bearing.

[0053] The rotating cylinder generates thrust through up and down telescopic movement, and with the help of the flexible support of the ball bearing, drives the trenching arm 100 to swing downward or upward; when the trenching arm 100 rotates downward, the water outlet pipe 110 on the trenching arm 100 will spray high-pressure water to the seabed, and the kinetic energy of the water flow weakens the seabed soil layer, thereby achieving deeper excavation; when the trenching arm 100 rotates upward, the excavation depth decreases accordingly, which is suitable for shallow excavation tasks; through the vertical movement of the rotating cylinder and the coordination of the rotating part 410, the rotation of the trenching arm 100 is smoother, the mechanical friction and resistance are reduced, and the flexibility and accuracy of the depth adjustment are guaranteed. The ball bearing serves as the rotating part 410, allowing the vertical cylinder 420 to have a certain swing range while driving the trenching arm 100 to swing, further improving the adaptability of the system under complex terrain conditions.

[0054] The sliding assembly 300 includes a sliding drive cylinder 310 and a pusher. One end of the sliding drive cylinder 310 is connected to a frame, and the other end of the sliding drive cylinder 310 is connected to the pusher. The pusher is fixedly connected to the outer cylinder 220. The sliding drive cylinder 310 drives the outer cylinder 220 to move relative to the inner cylinder 210 through the pusher.

[0055] The pusher includes an arc block 320 and a connecting block 330, wherein the connecting block 330 is provided with a rolling block 340, and the arc block 320 is provided with an arc groove 350, and the connecting block 330 is slidably connected with the arc groove 350;

[0056] The arc block 320 is in the shape of three quarters of a disk;

[0057] The rolling block 340 can roll along the arc groove 350 within a range of 0 to 270 degrees.

[0058] The sliding assembly 300 includes a sliding drive cylinder 310, an arc block 320 and a connecting block 330. One end of the connecting block 330 is connected to the sliding drive cylinder 310, and the other end is slidingly connected to the arc block 320 through a rolling block 340. Arc grooves 350 are provided on both sides of the arc block 320. The rolling block 340 is concave in shape. The raised parts on both sides slide with the arc grooves 350, and the concave part in the middle slides with the edge of the outer wall of the arc block 320. The arc block 320 is fixedly connected to the outer cylinder 220. Driven by the sliding drive cylinder 310, the rolling block 340 moves in the arc groove 350 of the arc block 320 along the groove. A track sliding is provided, and the arc block 320 is in the shape of a three-quarter hollow disc, that is, the rolling block 340 makes a three-quarter circular motion along the arc groove 350, and drives the outer cylinder 220 to slide by means of rotational motion, and drives the trenching arm 100 to make a horizontal displacement relative to the inner cylinder 210, thereby realizing the operation of the trenching arm 100 at different positions. As the trenching arm 100 moves outward, the width of the trench increases; conversely, when moving inward, the width of the trench decreases; the sliding drive cylinder 310 can accurately control the sliding displacement of the trenching arm 100, thereby realizing flexible width adjustment in underwater operations to meet different construction needs.

[0059] In summary, the designs of the rotating component 400 and the sliding component 300 cooperate with each other, and can achieve synchronous control of the excavation depth on the basis of adjusting the excavation width; when the sliding component 300 drives the trenching arm 100 to slide outward to increase the trenching width, the rotating component 400 can simultaneously adjust the rotation angle of the trenching arm 100, so as to penetrate into deeper soil layers to increase the trenching depth. This linkage mechanism ensures that the jet cutter can dynamically adjust the width and depth according to different excavation requirements during the construction process, thereby improving the flexibility and efficiency of the operation; in addition, this design of this embodiment can also be adapted to different geological conditions. The sliding component 300 controls the trenching arm 100 to work in a narrower area, and the rotating component 400 increases the excavation depth so that the high-pressure water flow is concentrated on the target area. Combined with the high-pressure water flow, the hard strata can be effectively broken. This design not only improves the adaptability of the trenching arm 100, but also reduces the mechanical impact caused by the hard terrain, thereby protecting the trenching arm 100 and extending the service life of the equipment.

[0060] The jet cutter for underwater trenching further comprises a regulating valve 600 , which is disposed between the two groups of inner cylinders 210 and is used to control the connection / closure of the two groups of inner cylinders 210 .

[0061] In this embodiment, the regulating valve 600 is a hydraulically controlled butterfly valve, which is arranged at the connection between the two groups of inner cylinders 210. The purpose of the butterfly valve is to control the opening or closing of the inner cylinders 210 on both sides. Specifically, in one embodiment, when the hydraulically controlled butterfly valve is closed, the inner cylinders 210 on both sides are not connected. At this time, the water inlet assemblies 500 on both sides can be opened at the same time to supply water to the inner cylinders 210. In this case, the trenching and water spraying pressures of the two trenching arms 100 do not affect each other. The purpose of this arrangement is to make the water spraying and trenching pressures of the trenching arms 100 on both sides not affect each other. The water spraying and trenching pressures on both sides can be adjusted to be the same or different according to needs. When the trenching pressures on both sides are When the trenching water spraying pressure is consistent, on the one hand, the balance and stability of the equipment is maintained during operation; on the other hand, the high-pressure water flow sprayed by the trenching arm 100 to the seabed has a consistent impact force and excavation depth. The uniform water pressure can ensure that the depth and width of the trenches excavated by the trenching arms 100 on the left and right sides remain consistent, ensuring the symmetry and continuity of the trench shape, which is particularly critical for projects that require high-precision construction such as underwater pipelines and optical cable laying, and can significantly improve the quality and efficiency of operations; when there are different needs, the water spraying trenching pressure of the trenching arms 100 on both sides can also be adjusted separately to adapt to different terrain and geology.

[0062] In another embodiment, by closing the butterfly valve, the water inlet assemblies 500 on both sides can be controlled to supply water according to the operation requirements. When only one side of the trenching arm 100 is needed to dig trenches, the corresponding water inlet assembly 500 can be controlled to work separately.

[0063] On the basis of the above-mentioned embodiment, when the butterfly valve is opened, in response to the situation of relatively soft geology, only one side of the water inlet assembly 500 can be opened to supply water, that is, one water inlet assembly 500 supplies water to two trenching arms 100. The purpose of such a setting is to reduce the pressure of the water spraying trenching of the trenching arm 100, and reduce the flying of soil caused by excessive pressure of the water spraying trenching.

[0064] In another embodiment, a trenching robot is proposed, which is applied to the jet cutter for underwater trenching in the above embodiment, including a mounting frame and a fixing part. The sliding assembly 300 is fixedly connected to the trenching robot through the mounting frame, and the rotating assembly 400 is fixedly connected to the trenching robot through the fixing part.

[0065] In summary, the underwater trenching jet cutter and trenching robot of the present invention realizes dynamic adjustment of trenching width and depth through the coordinated work of the trenching arm 100, the sliding assembly 300, the rotating assembly 400, the transfer assembly 200, the water inlet assembly 500 and the regulating valve 600 to adapt to different geological conditions and operation requirements; specifically, the water inlet assembly 500 includes a hydraulic drive, a water pump 510, a fan blade 520, a water inlet pipe 530, a check valve and a filter. Under the action of the hydraulic drive, the fan blade 520 rotates at a high speed to generate suction, and the external water enters through the water inlet 540. The water enters the water inlet pipe 530 and is pressurized and transported to the transfer component 200. The filter element filters impurities, and the check valve ensures the unidirectionality of the water flow, prevents water backflow, and ensures the stability of the water supply and high-pressure output. The transfer component 200 is composed of an inner cylinder 210 and an outer cylinder 220. The inner cylinder 210 is provided with a plurality of water inlet holes 700. The water flows through the water inlet holes 700 of the inner cylinder 210 and the diameter difference between the inner and outer cylinders 220 and is transported to the trenching arm 100. The sliding component 300 drives the outer cylinder 220 to slide along the inner cylinder 210 through the sliding drive cylinder 310 and the arc block 320 structure to adjust the trenching width. When the trenching arm 100 gradually approaches the water inlet assembly 500, the water flow path becomes shorter; when the trenching arm 100 moves away from the water inlet assembly 500, the water flows into the trenching arm 100 through the diameter difference between the inner and outer cylinders 220; the rotating assembly 400 is connected to the trenching arm 100 through the rotating cylinder and the ball bearing, driving the trenching arm 100 to rotate up and down to achieve dynamic adjustment of the excavation depth. When the trenching arm 100 rotates downward, high-pressure water is sprayed to the seabed to achieve deeper excavation; when rotating upward, it is suitable for shallow excavation, and the design of the ball bearing enables the rotating cylinder to swing within a certain range; in addition, the regulating valve 600 is arranged between the two inner cylinders 210 to control whether the inner cylinders 210 are connected. When the butterfly valve is closed, the trenching arms 100 on both sides can be supplied with water separately, and the water pressures do not interfere with each other, so that the water spraying pressures of the trenching arms 100 on both sides can be adjusted to be the same or different according to demand, ensuring the stability of equipment operation and the excavation effect; when the butterfly valve is opened, water can be supplied to the two trenching arms 100 when the single-side water inlet assembly 500 supplies water, which is suitable for soft geological conditions, reduces the water spraying pressure, and reduces the flying of mud. The design of this embodiment realizes the dynamic adjustment of trenching width and depth, which can adapt to wide shallow trenching in soft terrain, and can also perform high-pressure deep excavation on hard terrain. At the same time, it also protects the equipment and prolongs its service life, and is widely used in high-precision construction scenarios such as underwater pipeline laying and optical cable burying.

[0066] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A jet cutter for underwater trenching, characterized in that: It comprises a trenching arm (100) and a sliding assembly (300), wherein the number of the trenching arms (100) is two, the two trenching arms (100) are both connected to a transfer assembly (200), the transfer assembly (200) is connected to a water inlet assembly (500), and the sliding assembly (300) is installed on the transfer assembly (200); The transfer assembly (200) comprises an inner cylinder (210) and an outer cylinder (220); a water inlet hole (700) is provided on the inner cylinder (210) in the circumferential direction; a gap (710) is provided between the outer cylinder (220) and the inner cylinder (210) to form a water outlet channel; and the sliding assembly (300) is used to drive the outer cylinder (220) to move relative to the inner cylinder (210); The sliding assembly (300) drives the trenching arm (100) to move in a direction close to the water inlet assembly (500) to adjust the trenching width.

2. The jet punch for underwater trenching according to claim 1, characterized in that: It also includes a rotating assembly (400) disposed on the trenching arm (100), wherein the rotating assembly (400) is rotatably connected to the trenching arm (100) and is used to drive the trenching arm (100) to perform a rotational movement relative to the transfer assembly (200) to adjust the trenching depth.

3. The jet cutter for underwater trenching according to claim 1, characterized in that: The rotating assembly (400) comprises a rotating oil cylinder and rotating parts (410) arranged at both ends of the rotating oil cylinder, and the trenching arm (100) is movably connected to the rotating oil cylinder via the rotating parts (410).

4. The jet punch for underwater trenching according to claim 1, characterized in that: The sliding assembly (300) comprises a sliding drive cylinder (310) and a pushing member. One end of the sliding drive cylinder (310) is connected to a frame, and the other end of the sliding drive cylinder (310) is connected to the pushing member. The pushing member is fixedly connected to the outer cylinder (220). The sliding drive cylinder (310) drives the outer cylinder (220) to move relative to the inner cylinder (210) through the pushing member.

5. The jet punch for underwater trenching according to claim 4, characterized in that: The pushing member comprises an arc block (320) and a connecting block (330), the connecting block (330) is provided with a rolling block (340), the arc block (320) is provided with an arc groove (350), and the connecting block (330) is slidably connected to the arc groove (350).

6. The jet punch for underwater trenching according to claim 5, characterized in that: The arc-shaped block (320) is in the shape of three-quarters of a disk.

7. The jet punch for underwater trenching according to claim 1, characterized in that: It also includes a regulating valve (600) disposed between the two groups of inner cylinders (210) and used to control the connection / closure of the two groups of inner cylinders (210).

8. The jet cutter for underwater trenching according to claim 3, characterized in that: The trenching arm (100) is provided with a mounting lug (120), and the mounting lug (120) is connected to the rotating member (410).

9. A trenching robot, applied to the jet cutter for underwater trenching as claimed in claims 1 to 8, characterized in that: It comprises a mounting frame and a fixing member, the sliding assembly (300) is fixedly connected to the trenching robot via the mounting frame, and the rotating assembly (400) is fixedly connected to the trenching robot via the fixing member.

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