Spraying arm with adjustable length

Abstract

The invention discloses a length-adjustable spraying arm which comprises a fixed seat, a fixed spraying arm, a telescopic spraying arm and a length adjusting mechanism, the fixed end of the fixed spraying arm and the fixed end of the telescopic spraying arm are both installed on the fixed seat, the length of the telescopic spraying arm is larger than that of the fixed spraying arm, and a channel communicated with the fixed spraying arm and the telescopic spraying arm is arranged in the fixed seat. The fixed spraying arm and the telescopic spraying arm are each provided with a plurality of nozzles, one end of the length adjusting mechanism is connected with the telescopic end of the telescopic spraying arm, and the other end of the length adjusting mechanism is connected with the fixing base. By arranging the two spraying arm structures of the fixed spraying arm and the telescopic spraying arm, the length can be telescopically adjusted, the ditching depth is deeper when the device is applied to seabed digging, and the universality is wider; meanwhile, the spraying arm can conduct multi-nozzle spraying ditching according to the actual situation, the longer the extending part is, the more the nozzles are, and the ditching efficiency is higher.

Description

Technical Field

[0001] The invention belongs to the technical field of submarine cable laying, and in particular relates to a spray arm with adjustable length. Background Art

[0002] The laying of submarine cables requires the use of special trenching equipment to dig trenches and bury cables. The trenching method generally adopts the jet breaking operation method, which uses water jets to break the ground and dig trenches. The spray arm with a nozzle sprays water to flush the seabed to form a groove.

[0003] Currently, the length of the spray arms on trenching devices is fixed and cannot be adjusted, which limits their versatility when it is necessary to dig cable trenches of different depths. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a spray arm with adjustable length.

[0005] The technical solution adopted by the present invention is: a spray arm with adjustable length, comprising a fixed seat, a fixed spray arm, a telescopic spray arm, and a length adjustment mechanism, the fixed ends of the fixed spray arm and the telescopic spray arm are both installed on the fixed seat, the length of the telescopic spray arm is greater than the length of the fixed spray arm, a channel connected to the fixed spray arm and the telescopic spray arm is provided in the fixed seat, a plurality of nozzles are respectively provided on the fixed spray arm and the telescopic spray arm, one end of the length adjustment mechanism is connected to the telescopic end of the telescopic spray arm, and the other end is connected to the fixed seat.

[0006] Furthermore, the fixed spray arm includes a plurality of fixed nozzles of different lengths, the plurality of fixed nozzles are arranged in order from short to long, the plurality of fixed nozzles are located in the same vertical plane and are arranged obliquely, the shortest fixed nozzle is located at the bottom, and the nozzle is arranged at the bottom of the plurality of fixed nozzles.

[0007] Furthermore, the telescopic spray arm includes a plurality of telescopic nozzles arranged side by side and a plurality of fixed tubes arranged coaxially, the nozzle is arranged at the bottom of the plurality of telescopic nozzles, one end of the fixed tube is connected to the fixed seat, the other end of the fixed tube is sleeved inside the telescopic nozzle and is in sealing contact with the inner wall of the telescopic nozzle, the telescopic nozzle includes a fixed spray section and a telescopic spray section, the fixed spray section is arranged at the end of the telescopic spray section, and a mounting seat connected to one end of a length adjustment mechanism is provided on the fixed spray section.

[0008] Furthermore, a sealing ring is provided on the outer wall of the other end of the fixed tube, and the other end of the fixed tube is in sealing contact with the inner wall of the telescopic nozzle through the sealing ring.

[0009] Furthermore, the fixing seat includes a fixing plate and a triangular hinged section with a hollow interior, the fixed spray arm, the telescopic spray arm and the end of the fixing plate are all connected to one end of the hinged section, and the sides of the fixed spray arm and the telescopic spray arm are connected to the sides of the fixing plate.

[0010] The beneficial effects of the present invention are:

[0011] The spray arm of the present invention realizes telescopic length adjustment by providing two spray arm structures, namely a fixed spray arm and a telescopic spray arm. When applied to seabed excavation, the trenching depth is deeper and the versatility is wider. At the same time, the spray arm can perform multi-nozzle spray trenching according to actual conditions. The longer the extended part is, the more nozzles there are and the higher the trenching efficiency is. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention.

[0013] Figure 2 It is a partial schematic diagram of the telescopic spray arm of the present invention.

[0014] Figure 3 Another partial schematic diagram of the telescopic spray arm of the present invention.

[0015] In the figure, 1-fixed seat; 1.1-hinge section; 1.2-fixed plate; 2-fixed spray arm; 2.1-fixed nozzle; 3-telescopic spray arm; 3.1-telescopic nozzle; 3.2-fixed pipe; 3.3-fixed spray section; 3.4-telescopic spray section; 3.5-mounting seat; 3.6-sealing ring; 4-nozzle; 5-length adjustment mechanism. DETAILED DESCRIPTION

[0016] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0017] like Figure 1-3As shown, the present invention provides a spray arm with adjustable length, comprising a fixed seat 1, a fixed spray arm 2, a telescopic spray arm 3, and a length adjustment mechanism 5. The fixed seat 1 is used to be hinged and connected with the liquid pipeline 5.3 of the trenching device. The fixed ends of the fixed spray arm 2 and the telescopic spray arm 3 are both installed on the fixed seat 1. The length of the telescopic spray arm 3 is greater than that of the fixed spray arm 2. The telescopic spray arm 3 and the fixed spray arm 2 are arranged side by side and spaced at a certain distance, so that when the telescopic spray arm 3 is retracted, the nozzle 4 on the telescopic spray arm 3 can be stored. A channel communicating with the fixed spray arm 2 and the telescopic spray arm 3 is provided in the fixed seat 1. The plurality of nozzles 4 are arranged on the fixed spray arm 2 and the telescopic spray arm 3. The axes of the plurality of nozzles 4 are kept consistent. One end of the length adjustment mechanism 5 is connected to the telescopic end of the telescopic spray arm 3 and the other end is connected to the fixed seat 1. The spray arm length is adjusted by adjusting the length of the telescopic spray arm through the length adjustment mechanism 5. The telescopic adjustment device 5 is a telescopically adjustable hydraulic cylinder.

[0018] It can be understood that the fixed seat 1 includes a fixed plate 1.2 and a triangular hinge section 1.1 which is hollow inside, one end of the hinge section 1.1 is used for hinged connection with the liquid pipeline, the fixed spray arm 2, the telescopic spray arm 3 and the ends of the fixed plate 1.2 are all connected to the other end of the hinge section 1.1, and the sides of the fixed spray arm 2 and the telescopic spray arm 3 are connected to the sides of the fixed plate 1.2.

[0019] It can be understood that the fixed spray arm 2 includes a plurality of fixed nozzles 2.1 of different lengths, the plurality of fixed nozzles 2.1 are arranged in order from short to long, the plurality of fixed nozzles 2.1 are located in the same vertical plane and are arranged obliquely, the shortest fixed nozzle is located at the bottom, and the nozzle 4 is arranged at a position where the bottom of the plurality of fixed nozzles is not covered by the corresponding shorter fixed nozzles.

[0020] It can be understood that the telescopic spray arm 3 includes a plurality of telescopic nozzles 3.1 of different lengths and arranged side by side, and a plurality of fixed tubes 3.2 arranged coaxially, the nozzle 4 is arranged at the bottom of the plurality of telescopic nozzles 3.1, one end of the fixed tube 3.2 is connected to the fixed seat 1, and the other end is sleeved inside the telescopic nozzle 3.1, and a sealing ring 3.6 is provided on the outer wall of the other end of the fixed tube 3.2, and the sealing ring 3.6 is sealed with the inner wall of the telescopic nozzle 3.1, the telescopic nozzle 3.1 includes a fixed spray section 3.3 and a telescopic spray section 3.4, the fixed spray section 3.3 is arranged at the end of the telescopic spray section 3.4, and a mounting seat 3.5 connected to one end of the length adjustment mechanism is provided on the fixed spray section 3.3, and the length of the telescopic spray section 3.4 relative to the fixed tube 3.2 can be adjusted by the length adjustment mechanism 5, thereby realizing the adjustment of the length of the telescopic spray arm 3. The sealing ring 3.6 on the fixed tube 3.2 can ensure that after the telescopic spray section is adjusted (the length of the spray arm is shortened), the corresponding nozzle is sealed (i.e., the nozzle is separated from the inside of the fixed tube), so that the high-pressure liquid is not sprayed out from the nozzle 4.1 at the shortened part, but only sprayed out from the nozzle 4.2 that is not sealed, thereby reducing the number of nozzles (adjusting the length of the spray arm).

[0021] When the present invention is applied to a submarine trenching device, the hinged section of the fixed seat is connected to the liquid pipeline of the trenching device, and the length of the telescopic arm is adjusted by adjusting the length adjustment mechanism, so that trenches of different depths can be dug according to needs, and the versatility is wider.

[0022] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field.

Claims

1. A spray arm with adjustable length, characterized in that: The invention comprises a fixed seat (1), a fixed spray arm (2), a telescopic spray arm (3), and a length adjustment mechanism (5); the fixed ends of the fixed spray arm (2) and the telescopic spray arm (3) are both mounted on the fixed seat (1); the length of the telescopic spray arm (3) is greater than that of the fixed spray arm (2); a passage communicating with the interior of the fixed spray arm (2) and the telescopic spray arm (3) is provided in the fixed seat (1); a plurality of nozzles (4) are respectively provided on the fixed spray arm (2) and the telescopic spray arm; one end of the length adjustment mechanism (5) is connected to the telescopic end of the telescopic spray arm (3), and the other end is connected to the fixed seat.

2. The length-adjustable spray arm according to claim 1, characterized in that: The fixed spray arm (2) comprises a plurality of fixed spray pipes (2.1) of different lengths, the plurality of fixed spray pipes (2.1) being arranged in order from short to long, the plurality of fixed spray pipes (2.1) being located in the same vertical plane and being arranged obliquely, the shortest fixed spray pipe (2.1) being located at the bottom, and the nozzle (4) being arranged at the bottom of the plurality of fixed spray pipes (2.1).

3. The length-adjustable spray arm according to claim 1, characterized in that: The telescopic spray arm (3) comprises a plurality of telescopic spray pipes (3.1) arranged side by side and a plurality of fixed pipes (3.2) arranged coaxially, the nozzle (4) being arranged at the bottom of the plurality of telescopic spray pipes (3.1), one end of the fixed pipe (3.2) being connected to a fixed seat, the other end of the fixed pipe (3.2) being sleeved inside the telescopic spray pipe (3.1) and in sealing contact with the inner wall of the telescopic spray pipe, the telescopic spray pipe (3.1) comprising a fixed spray section (3.3) and a telescopic spray section (3.4), the fixed spray section (3.3) being arranged at the end of the telescopic spray section (3.4), and a mounting seat (3.5) connected to one end of a length adjustment mechanism being provided on the fixed spray section (3.2).

4. The length-adjustable spray arm according to claim 3, characterized in that: A sealing ring (3.6) is provided on the outer wall of the other end of the fixed tube (3.2), and the other end of the fixed tube (3.2) is in sealing contact with the inner wall of the telescopic nozzle (3.1) through the sealing ring (3.6).

5. The length-adjustable spray arm according to claim 1, characterized in that: The fixing seat (1) comprises a fixing plate (1.2) and a triangular hinged section (1.1) which is hollow inside; the ends of the fixing spray arm (2), the telescopic spray arm (3) and the fixing plate (1.2) are all connected to one end of the hinged section (1.1); and the sides of the fixing spray arm (2) and the telescopic spray arm (3) are connected to the sides of the fixing plate (1.2).

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