A type of nozzle for the mud chamber of a trailing suction dredger

Abstract

This utility model relates to a nozzle for the mud tank of a trailing suction dredger. One end of the nozzle has a base, which is integrally connected to a horizontal section, an arc section, and a conical nozzle head arranged sequentially. The internal cross-section of the nozzle consists of rectangles on both sides and a trapezoid in the middle. The nozzle head sprays water in a fan-shaped pattern. The nozzle includes a wear-resistant rubber layer, a wear-resistant layer, a reinforcing layer, and an outer rubber layer arranged sequentially. The nozzle is installed on the side of the flushing pipe, with an inclination angle of 48-50 degrees. The advantages of this utility model are: the multiple structures enhance the strength and durability of the nozzle; the conical nozzle head provides good flushing effect on mud and sand; the external structure of the nozzle, consisting of a base, horizontal section, arc section, and conical nozzle head, is an integrated structure, making installation convenient and aesthetically pleasing; adjusting the nozzle angle inside the mud well to 48-50 degrees reduces the probability of the nozzle being blocked by mud; and the water flow sprayed from several nozzles in a fan shape can better form a vortex inside the mud well, facilitating mud unloading.

Description

Technical Field

[0001] This utility model relates to the field of trailing suction hopper dredgers, specifically to a nozzle for the mud chamber of a trailing suction hopper dredger. Background Technology

[0002] During the unloading and desilting operations of trailing suction hopper dredgers, the vessel's onboard mud hopper dilution system is used to flush and loosen mud and impurities in any area of ​​the hopper as needed, facilitating unloading. This mud hopper dilution system mainly consists of high-pressure flushing pumps connected in parallel and reinforced self-closing rubber flushing nozzles installed at different positions and angles within the hopper. The flow rate, velocity, energy consumption, and consistency of the swirl pattern of the water jets from the high-pressure flushing nozzles are the main indicators determining the system's performance.

[0003] Traditional mud tank nozzles are made of single-layer nylon and fiberglass materials, which have disadvantages in terms of flexibility, strength, and durability, limiting their frequent use. Straight and tapered nozzles also suffer from poor consistency in outlet flow velocity and jet direction, resulting in scattered and intersecting flow patterns, leading to ineffective silt removal and low efficiency. Therefore, there is a need for a mud tank nozzle for trailing suction hopper dredgers that improves channel dredging efficiency through structural and arrangement improvements. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a mud tank nozzle for a trailing suction dredger, which can solve the problems of limited frequency of use, unsatisfactory consistency of outlet flow velocity and jet direction, relatively scattered outlet flow direction, poor flushing effect on mud and sand, and low efficiency of existing mud tank nozzles.

[0005] To solve the above technical problems, the technical solution of this utility model is as follows: one end of the nozzle is provided with a base, and the base is integrally connected with a horizontal section, an arc section and a conical nozzle head arranged in sequence, the outer diameter of the arc section gradually decreasing from the base to the nozzle head; The internal space cross-section of the nozzle is composed of rectangles on both sides and a trapezoid in the middle, and the nozzle head sprays water out in a fan shape. The nozzle comprises a wear-resistant rubber layer, a wear-resistant layer, a reinforcing layer and an outer rubber layer arranged sequentially from the inner wall to the outer wall; The nozzle is installed on the side of the flushing pipe and is set at an angle with the vertical direction of 48°-50°.

[0006] Furthermore, a flange is connected to one side of the base, and the flange is fitted around the outer periphery of the horizontal section.

[0007] Furthermore, the flushing pipe is equipped with several nozzles, all with the same tilt angle, and the water jets from the nozzles in a fan shape form a swirling flow within the mud well.

[0008] With the above structure, the advantages of this utility model are: the strength and durability of the nozzle are enhanced by the multiple structure of wear-resistant rubber layer, reinforcing layer and outer rubber layer; The nozzle head is designed with a conical-straight structure inside, which makes the jet velocity at the nozzle outlet uniform, the jet direction distribution extremely uniform and concentrated, the jet direction and size are highly consistent, the spraying efficiency is high, and the scouring effect on mud and sand is good and efficient; the external structure of the nozzle is a one-piece structure formed by the base, horizontal section, arc section and conical-straight nozzle head, which is easy to install and has an aesthetically pleasing appearance. The angle of the nozzles inside the mud well is adjusted from the existing 45° tilt angle to 48-50° by 3-5 degrees. This cuts the mud at an angle, improving the stability of the impact process and reducing the probability of the nozzles being blocked by mud. The water flow sprayed from several nozzles in a fan shape can better form a vortex inside the mud well, changing the direction and speed of the water flow, and better washing away mud, sand and pollutants with the mud water, making it easier to unload the mud. Attached Figure Description

[0009] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a schematic diagram of the nozzle mounting structure of this utility model. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments can enable those skilled in the art to more fully understand this utility model, but do not limit the present utility model to the scope of the described embodiments.

[0011] This specific implementation method adopts the following technical solution: (e.g.) Figure 1 As shown, one end of the nozzle 10 is provided with a base 1. The base 1 is integrally connected with a horizontal section 2, an arc section 3 and a conical nozzle head 4 arranged in sequence. The outer diameter of the arc section 3 gradually decreases from the base 1 to the nozzle head 4. The external structure of the nozzle 10 is an integral structure formed by the base 1, the horizontal section 2, the arc section 3 and the nozzle head 4, which is aesthetically pleasing. A flange 5 is connected to one side of the base 1, and the flange 5 is fitted around the outer periphery of the horizontal section 2, which facilitates the installation of the nozzle 10.

[0012] The internal space cross-section of the nozzle 10 is composed of rectangles on both sides and a trapezoid in the middle, and the nozzle head 4 sprays water out in a fan shape.

[0013] Although straight nozzles have good consistency in jet direction, the outlet velocity distribution on the cross-section is very uneven. The velocity at the center is significantly higher than the average velocity, and the jet velocity near the two sides is lower than that of the central nozzle. In contrast, the outlet velocity of a conical nozzle is more uniformly distributed on the cross-section, but the direction is very scattered, with the velocity directions at each outlet point intersecting. By designing nozzle head 4 as a conical straight structure, the outlet jet of nozzle head 4 is extremely uniform and concentrated in both velocity and direction, resulting in high spraying efficiency and good scouring effect on mud and sand.

[0014] The nozzle 10 includes a wear-resistant rubber layer 11, a reinforcing layer 12 and an outer rubber layer 13 arranged sequentially from the inner wall to the outer wall. Through multiple structures, the strength and durability of the nozzle 10 are enhanced.

[0015] The wear-resistant rubber layer 11 is made of Kevlar fiber reinforced rubber. Kevlar fiber has permanent heat resistance and flame retardancy, permanent antistatic properties, permanent resistance to acid, alkali and organic solvent corrosion, as well as high strength, high wear resistance and high tear resistance.

[0016] like Figure 2 As shown, the nozzle 10 is installed on the side of the flushing pipe 20 and is inclined. The angle between the nozzle 10 and the vertical direction is 48°-50°. In this embodiment, the angle between the nozzle 10 and the vertical direction is set to 50°. The angle of the nozzle in the mud well is adjusted from the inclination angle of 45° in the prior art to 50°. This creates a cutting effect on the mud in an oblique manner, improving the stability of the impact process and preventing the nozzle 10 from being blocked by mud. Several nozzles 10 are distributed on the flushing pipe 20. The inclination angle of the several nozzles 10 is the same. The water flow sprayed by the several nozzles 10 in a fan shape can better form a vortex in the mud well, change the direction and speed of the water flow, and better flush away the mud and pollutants with the mud water, which is convenient for unloading mud.

[0017] Working principle: By designing the nozzle 10 with a multi-layered wear-resistant rubber layer, reinforcing layer, and outer rubber layer, the overall strength and durability of the nozzle 10 are enhanced. The external structure of the nozzle 10 is an integrated structure formed by the base 1, horizontal section 2, arc-shaped section 3, and conical nozzle head 4, which is easy to install and aesthetically pleasing. The internal structure of the nozzle head 4 is a conical structure, which ensures that the outlet jet velocity of the nozzle 10 is consistent, the jet direction distribution is extremely uniform and concentrated, the jet direction and size are highly consistent, the spraying efficiency is high, and the scouring effect on mud and sand is good and efficient. The angle of the nozzle 10 in the mud well is adjusted from the existing tilt angle of 45° to 48-50 degrees, which cuts the mud in a slanted manner, improves the stability of the impact process, and prevents the nozzle 10 from being blocked by mud. The water flow sprayed by several nozzles 10 in a fan shape can better form a vortex in the mud well, change the direction and speed of the water flow, and better flush away mud, sand, and pollutants with the mud water, which is convenient for mud unloading.

[0018] The mud tank dilution system is supplied with water by parallel high-pressure flushing pumps. Each high-pressure flushing pump has a flow rate of 12,000 m³ / s at a pressure of 6 bar. 3 The total flow rate of the dilution system is approximately 24,000 m³ / h. 3 The trailing suction dredger has 16 mud gates. In order to flush out the mud and sand in the mud chamber, each pair of mud gates is equipped with a flushing pipe 20, with a total of about 12 nozzles 10. Each mud well has about 20 nozzles 10, and the mud chamber is equipped with a total of about 446 nozzles 10.

[0019] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dredge pump nozzle for a cutter suction dredge, characterized by: One end of the nozzle is provided with a base, the base is integrally connected with a horizontal section, an arc section and a nozzle head of conical shape arranged in sequence, the outer diameter of the arc section gradually decreases from the base to the nozzle head; The internal space cross section of the nozzle is composed of two rectangular sides and a trapezoidal middle, the nozzle head sprays water in a fan-shaped surface; The nozzle comprises a wear-resistant rubber layer, a wear-resistant layer, a reinforcing layer and an outer rubber layer arranged in sequence from the inner wall to the outer wall; The nozzle is installed on the side of the flushing pipe and is obliquely arranged, the included angle between the nozzle and the vertical direction is 48°-50°.

2. A spud nozzle for a trailing suction hopper dredger according to claim 1, characterized in that: One side of the base is connected with a flange, and the flange is sleeved on the outer periphery of the horizontal section.

3. A spud nozzle for a trailing suction hopper dredger according to claim 1, characterized in that: A plurality of nozzles are distributed on the flushing pipe, the inclination angles of the plurality of nozzles are the same, and the water sprayed by the plurality of nozzles in a fan-shaped surface forms a rotational flow in the mud well.

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