CN105220726A - Native device is broken through in the controlled spray of flow - Google Patents

Abstract

A flow-controllable jetting soil-breaking device, comprising: a waterway switching unit, a soil-breaking unit and a swing unit connected in sequence, wherein: the waterway switching unit is provided with several groups of water supply channels and valve cores, and each valve core is provided with The angle sensor is used to realize the precise control of the flow rate. The water flow flows in from the waterway switching unit and is ejected from the soil breaking unit. This device can realize the division of different heights in the submarine trench through the segmental switching of the waterway without increasing the lift and flow rate. Segmental centralized groundbreaking can use the water supply of the original pumps in sections without increasing the number and capacity of the pumps, reducing the power, system complexity, and cost increase brought by the addition of water pumps. The centralized use of sections improves the efficiency of the original equipment, and the system is driven by hydraulic pressure, which is easy to maintain.

Description

Flow-controllable jetting soil breaking device

technical field

The invention relates to a technology in the field of subsea pipeline embedding, in particular to a flow-controllable blasting soil-breaking device.

Background technique

Submarine pipelines and cables need to use a special buried system, that is, submarine buried cable/pipe trenching machine. According to their different operation methods, they can be divided into pre-trenching operations (digging trenches first, and then laying submarine pipelines and cables), and post-trenching operations ( Lay submarine pipelines and cables first, then dig trenches) and bury while laying (lay submarine pipelines and cables and dig trenches at the same time). According to the different ways of breaking ground, it can be divided into spraying and mechanical breaking. The spraying method uses water jets to break the soil and dig trenches, and the mechanical tools use mechanical tools to cut and destroy the soil, and the power required is often greater than that of the jetting method. In addition, mechanical trenching is more likely to cause impact on pipelines than spraying and breaking soil, which affects the safety of pipeline embedding. Therefore, mechanical trenching is often used in pre-digging operations, and its universality is not as good as spraying and breaking soil.

At present, with the continuous improvement of related regulations for offshore oil development, offshore oil pipelines are generally buried in the trench depth range of 3-4 meters, which poses a great challenge to submarine trenching equipment. The traditional jetting soil breaking device is limited by the flow rate of the jet pump, so it can only excavate shallow trenches in soft soil. If you want to expand the trench depth and face hard ground, you need a larger lift and flow to realize ditching break ground. However, the total weight of the underwater ditching system should not be too large, otherwise it will affect the safety of deep-water operations, and it will also put forward higher requirements for the mother ship, which will greatly increase the cost.

After searching the prior art, it was found that the Chinese Patent Document No. CN204475397, with a publication date of July 15, 2015, discloses a wheeled self-propelled subsea trenching machine, including a wheel frame, a wheel set, a main frame, rubber hoses, multiple Beam sounding sonar system, balance bar, spray frame, propeller, the main frame is connected with two sets of wheel frames, each set of wheel frames are equipped with wheel sets on both sides, and the main frame is provided with two joints head, each union head is connected to a spray frame, and spray holes are arranged on the spray frame. But in this device, the spray frame is transported to the trenching machine on the seabed by the pressurized water pump on the deck. The water flow cannot be controlled inside the spray frame, and it can only be kept in a normal state. More flow is required to complete the spraying of soil. Moreover, the trenching tool that passes through the pressurized water pump from the deck is only suitable for shallow water operations, because the connecting pipeline is too long, which will cause pressure loss, and is affected by the ocean current, resulting in lateral force, which greatly affects the safety of the trenching machine's subsea construction sex.

Chinese patent document CN104314127A, published on January 28, 2015, discloses a 500-meter water depth hard soil subsea pipeline laying machine and hydraulic jet composite rotary opener, which mainly includes an external support, an external rotating round hole, a cutter Teeth, upper suspension cylinder, lower support column, plow share, nozzle, high-pressure water pipe, inner cylinder, baffle, sealing rubber water-proof pad, motor, output drive shaft, coupling, upper and lower plane fixed-axis gear train, top cover , bottom cover, bearing and other main components. The motor drives the rotation of the upper and lower top covers, the outer rotating cylinder and the cutter teeth through the upper and lower plane fixed-axis gear trains to realize the function of breaking the seabed. The high-pressure water sprayed by the high-pressure water pipe and the nozzle can Crush the hard soil, reduce the cutting resistance of the cutter teeth, and the liquefied soil is sucked out through the suction pipe of the mud pump to realize the function of seabed ditching. But this device can only carry out ditching operation on the seabed without laying sea pipes, i.e. common pre-trenching operation, and cannot carry out ditching operation on the seabed with laying sea pipes, i.e. common post-trenching operation. In the actual operation process, the pipeline is often laid before operation, and the use conditions of the device are limited.

Contents of the invention

Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a flow-controllable blasting soil-breaking device.

The present invention is achieved through the following technical solutions:

The invention includes: a waterway switching unit, a soil breaking unit and a swing unit connected in sequence, wherein: the waterway switching unit is provided with several groups of water supply channels and valve cores, and each valve core is provided with an angle sensor to realize accurate control of the flow rate. Inflow from the waterway switching unit and spray out from the ground breaking unit.

The soil-breaking unit includes: a spraying arm and a nozzle, wherein: the spraying arm is composed of a plurality of spraying pipes with different lengths, and the nozzles are arranged on the spraying arm and connected with the corresponding spraying pipes.

The spraying pipes are ladder-shaped and are respectively connected with corresponding water supply channels.

The swing mechanism includes: a hydraulic cylinder and a cylinder head seat, wherein the oil cylinder head seat is arranged on the upper part of the spray arm, and one end of the hydraulic cylinder is connected with the oil cylinder head seat to drive the spray arm to swing.

technical effect

Compared with the prior art, the present invention can achieve segmental and concentrated soil breaking in different heights in the submarine ditch through the segmental switching of the waterway without increasing the lift and flow rate, and can not increase the number and capacity of the water pumps, and The water supply of the original water pump is used in a centralized manner in sections, which reduces the power, system complexity, and cost increase brought about by the addition of water pumps. By using the water supply of the original water pump in sections and centralized use, the use efficiency of the original equipment is improved. The system adopts hydraulic drive, which is easy to maintain.

Description of drawings

Fig. 1 is the front view of spraying soil breaking device;

Fig. 2 is the top view of spraying soil breaking device;

Fig. 3 is a schematic structural diagram of a waterway switching unit;

In the figure: 1 water inlet unit; 2 waterway switching unit; 21 water supply flange; 22 water supply channel; 23 spool; 24 angle sensor; 25 hydraulic motor; Tube; 312 central spray pipe; 313 lower spray pipe; 4 swing unit; 41 cylinder; 41 cylinder head seat; 5 drive and control unit.

detailed description

The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

Example 1

As shown in Figures 1 and 2, this embodiment includes: a waterway switching unit 2, a ground breaking unit 3 and a swing unit 4 connected in sequence, wherein: the inlet end of the waterway switching unit 2 is provided with a water inlet unit 1, and the swinging unit 4 is connected to the ground breaking unit. The units 3 are connected, and the upper part of the waterway switching unit 2 is provided with a drive and control unit 5 .

The soil-breaking unit 3 includes a spraying arm 31 and a nozzle 32, and the spraying arm 31 is composed of three spraying pipes, as shown in Figure 1, the upper spraying pipe 311 is the longest, and the lower spraying pipe 313 is the shortest, wherein The two sides and the tail end of the upper spraying pipe 311 are provided with nozzles 32; the both sides and the bottom of the front end of the middle spraying pipe 312 are provided with nozzles 32; The angle α between the nozzle 32 and the spraying arm arranged at the bottom of the lower spraying pipe 313 is 30°.

As shown in Fig. 3, three groups of water supply passages 22 and valve cores 23 thereof are arranged in the described waterway switching unit 2, wherein: the water supply passage 22 forms a cabin structure, and its two ends are connected with the water supply pipes arranged in the waterway switching unit 2 respectively. The flange 21 is connected to the corresponding flushing pipe; the upper end of the spool 23 is provided with a hydraulic motor 25, and the lower end is provided with an angle sensor 24 connected to the spool 23. The rotation of the spool 23 is controlled by the angle sensor 24, and the spool 23 can be adjusted. The amount of covering with the water supply channel 22 is used to regulate the flow through the water supply channel.

The swing unit 4 includes: a hydraulic cylinder 41 and a cylinder head 42, wherein: the cylinder head 42 is arranged on the upper part of the spray arm 31 and connected to one end of the hydraulic cylinder 41 to drive the spray arm 31 to swing up and down.

In this embodiment, the water inlet unit 1 is realized by flange connection, and in other cases, a soft connector or other methods can also be used to realize the delivery of water flow.

The water flows from the water inlet unit 1 through the water channel switching unit 2 to achieve selective flow control, enters the interior of each spray pipe of the spray arm 31, and finally flows out from the nozzle 32 at high speed to realize layered spraying and breaking through the soil.

Compared with the prior art, the present invention can achieve segmental and concentrated soil breaking in different heights in the submarine ditch through the segmental switching of the waterway without increasing the lift and flow rate, and can be used without increasing the number and capacity of the water pumps. The water supply of the original water pump is used in a centralized manner in sections, which reduces the power, system complexity, and cost increase brought about by the addition of water pumps. By using the water supply of the original water pump in sections and centralized use, the use efficiency of the original equipment is improved. The system adopts hydraulic drive, which is easy to maintain.

Claims (6)

1. native device is broken through in the spray that a flow is controlled, it is characterized in that, comprise: the water route switch unit connected successively, break ground unit and swing unit, wherein: in the switch unit of water route, be provided with some groups of water channels and spool thereof, each spool is provided with angular transducer to realize precise control of flew, and current flow into from water route switch unit and sprayed by the unit that breaks ground.

2. native device is broken through in the spray that flow according to claim 1 is controlled, it is characterized in that, the described unit that breaks ground comprises: spray rush arm and nozzle, wherein: spray rush arm by multiple length not wait spray washing pipe form, nozzle is arranged at spray and rushes on arm, and is connected with the corresponding washing pipe that sprays.

3. native device is broken through in the spray that flow according to claim 2 is controlled, it is characterized in that, described spray washing pipe is stairstepping, and is connected with corresponding water channel respectively.

4. native device is broken through in the spray that flow according to claim 1 is controlled, it is characterized in that, is provided with three water channels in described water route switch unit, forms cabin formula structure; The two ends of this water channel are connected with corresponding spray washing pipe with the water supply flange be arranged in the switch unit of water route respectively.

5. native device is broken through in the spray that flow according to claim 1 is controlled, it is characterized in that, described spool upper end is provided with hydraulic motor to drive spool, lower end is provided with the angular transducer be connected with spool, control valve core rotation by angular transducer, regulate the flow by water channel with regulating spool and water channel covering amount.

6. native device is broken through in the spray that flow according to claim 1 is controlled, it is characterized in that, described swing mechanism comprises: hydraulic jack and oil cylinder headstock, wherein: oil cylinder headstock is arranged at spray and rushes arm top, hydraulic jack one end is connected with oil cylinder headstock, rushes arm swing to drive spray.