CN220144235U - Diesel driven submarine pipeline cleaning device - Google Patents

Abstract

The utility model provides a diesel oil driven submarine pipeline cleaning device, which belongs to the technical field of submarine pipeline blockage cleaning and comprises a skid-mounted support, wherein a water tank, a booster pump, a high-pressure plunger pump, a diesel engine, a PLC control cabinet and a monitor are arranged in the skid-mounted support, the output end of the diesel engine is connected with the booster pump, the water inlet of the booster pump is connected with the water tank through a water inlet pipe, the water outlet of the booster pump is connected with the water inlet of the high-pressure plunger pump through a pipeline, the water outlet of the high-pressure plunger pump is connected with a water outlet pipe, a branch bypass is arranged on the pipeline of the water outlet pipe, a water return pipeline is connected with the branch bypass, one end of the water return pipeline, which is far away from the water outlet pipe, is connected with the water tank, and the monitor is respectively and electrically connected with the diesel engine and the high-pressure plunger pump. The utility model concentrates the diesel engine, the cleaning system and the control system in one frame box body, is convenient to operate and high in integration level, does not need to consider the problems of electric power and the like, is not limited by the operation environment and conditions, and can solve the blocking problem to the greatest extent.

Description

Diesel driven submarine pipeline cleaning device

Technical Field

The utility model belongs to the technical field of submarine pipeline blockage removal, and particularly relates to a diesel-driven submarine pipeline cleaning device.

Background

Disposal of offshore retired oil fields is an indispensable ring for offshore oil field disposal, and domestic green circulation and low-cost disposal demands are urgent. Well abandoning operation is needed to be completed before the offshore oil and gas production facilities are dismantled, and the production facilities and submarine pipelines are cleaned so as to meet the requirements of dismantling safety cutting. Submarine pipelines are used as infrastructure, the harmony with the ecological environment is emphasized in the construction of the pipelines, the traditional management concepts, means and methods are more and more difficult to adapt to the requirements of the increasingly-changing environment on the pipeline safety management, and the safety and environmental protection problems of the submarine pipelines are more and more concerned by enterprises and society.

If the abandoned submarine pipeline is not treated, the probability of damage or leakage is greatly increased along with the increase of time, and a great risk exists. Waste pipeline residues are divided into inorganic matters and organic matters, wherein the inorganic matters mainly comprise various salts, sediment and sulfides contained in oil gas, and common scale salts comprise calcium carbonate, calcium sulfate, barium sulfate and the like; the organic matter is mainly oil dirt such as paraffin, oil condensate, colloid and asphaltene. At present, a physical cleaning method, a chemical cleaning method, a physical-chemical combination method and a steam cleaning method are commonly adopted for cleaning pipelines at home and abroad. One of the physical cleaning methods is cleaning by a cleaner, and the cleaning cleaner is a shell or a spherical tool which is made from elastic compressible high foaming polyurethane serving as a main raw material. The pig cleaning technology consists of complete equipment and various technologies, and the main body of the pig cleaning technology comprises a pig sending system, a pig receiving system, a power supply and related detection technologies. The technology is particularly suitable for cleaning long-distance pipelines.

The purpose of the ball passing of the pipeline is to remove sundries in the pipeline, ensure production circulation or obtain deformation and corrosion state information of the pipeline, and the like. Because the pipeline is in the highly sensitive area of environment and the pipeline is not cleaned for a long time, the pipe cleaner is easy to be blocked, and the cleaning operation difficulty is increased. The cause of the seizing ball is numerous and mainly includes the pipe body, pipe parts, pipe running environment conditions, pig or detector structure, etc. Especially under the condition that the internal state of the pipeline is not clear, pipeline blocking and transportation stopping are easily caused by directly carrying out pipeline cleaning or internal detection measures, even the problems of maintenance and the like are caused, and huge risks are generated for oil field production and safety management. In addition, because the submarine pipeline is below the water surface, the difficulty in positioning and taking the ball at the ball clamping position is doubled.

The main current card releasing method comprises the following steps: process adjustment, secondary adjustment, etc. Aiming at the special working conditions of overlarge resistance, ball blocking and the like, a method for cleaning the blockage by using a reciprocating pump is suggested.

Therefore, according to the submarine pipeline cleaning blocking phenomenon of the offshore oil platform, a special pump set suitable for submarine pipeline blocking is selected, automation and standardization of submarine pipeline blocking cleaning equipment are improved in the aspects of equipment selection, design, prying, safety and the like, the equipment process connection time is shortened, and the autonomous pipeline blocking cleaning equipment is formed.

Disclosure of Invention

In view of the above, the utility model aims to provide a diesel-driven submarine pipeline cleaning device which is free from the problems of electric power and the like, is not limited by the operation environment and conditions, and solves the blocking problem to the greatest extent.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows: the utility model provides a diesel oil drive formula submarine pipeline belt cleaning device, includes sled dress support, install water tank, booster pump, high-pressure plunger pump, diesel engine and PLC switch board and monitor in the sled dress support, the output of diesel engine with the booster pump is connected, the water inlet of booster pump pass through the inlet tube with the water tank is connected, its delivery port pass through the pipeline with the water inlet of high-pressure plunger pump is connected, the delivery port of high-pressure plunger pump is connected with the outlet pipe, be provided with the branch bypass on the pipeline of outlet pipe, be connected with the return water pipeline on the branch bypass, the return water pipeline is kept away from the one end of outlet pipe is connected with the water tank, monitor and diesel engine, high-pressure plunger pump electric connection respectively.

Further, the water outlet of the high-pressure plunger pump is further connected with a pressure relief pipeline, one end, far away from the high-pressure plunger pump, of the pressure relief pipeline is connected with the water tank, and a pressure relief valve is installed on the pressure relief pipeline.

Further, a water inlet valve is arranged on the water inlet pipe; the water outlet pipe is provided with a stop valve and an electromagnetic flowmeter, and the electromagnetic flowmeter is arranged at the rear end of the stop valve; an electric regulating valve is arranged on the return pipeline, and the electric regulating valve can automatically regulate and control the return flow according to the flow monitoring result of the electromagnetic flowmeter on the water outlet pipe; and the electromagnetic flowmeter and the electric regulating valve are respectively and electrically connected with the PLC control cabinet.

Furthermore, a pressure gauge and a pressure transmitter are arranged on a water inlet pipeline of the high-pressure plunger pump, and the pressure gauge and the pressure transmitter are arranged at the position, close to the water outlet of the high-pressure plunger pump, of the water outlet pipe; and the two pressure transmitters are respectively and electrically connected with the PLC control cabinet.

Further, a water filling port, an overflow port, a discharge port and a liquid level meter are arranged on the side wall of the water tank, a manhole is arranged at the top end of the water tank, and a temperature transmitter is arranged in the water tank; the water injection port is provided with an electromagnetic regulating valve, the overflow port is provided with an overflow valve and a quick connector, the liquid level meter is provided with a liquid level transmitter, and meanwhile, the temperature transmitter, the electromagnetic regulating valve and the liquid level transmitter are respectively and electrically connected with the PLC control cabinet.

Further, be provided with the door plant that can open or close around the sled dress support, sled dress support's top corresponds water tank position department is provided with the guardrail, sled dress support's side is provided with the cat ladder.

Further, the PLC control cabinet is provided with a touch screen, the explosion-proof level is ExdIIBT4, the protection level is IP65, and the PLC control cabinet is used for monitoring the whole cleaning process and displaying the process flow, so that signal feedback of a pressure transmitter and a temperature transmitter, signal feedback of instantaneous flow and accumulated flow of an electromagnetic flowmeter, opening and closing of an electric regulating valve and an electromagnetic regulating valve, high and low liquid level alarm of a liquid level meter and liquid level signal feedback are realized; the monitor is used for controlling the diesel engine and the high-pressure plunger pump to work.

Further, the pressure transmitter is made of 316L, the protection level is IP66, and the explosion-proof level is ExdIIBT4; the material of the liquid level meter is 316L, the protection level is IP66, and the explosion-proof level is ExdIIBT4; the temperature transmitter is made of 316L, the protection level is IP66, and the explosion-proof level is ExdIIBT4; the electromagnetic flowmeter is 316L in material quality, IP66 in protection level and ExdIIBT4 in explosion-proof level.

Further, the outlet of the high pressure plunger pump is provided with a turbulence plate.

Compared with the prior art, the diesel driven submarine pipeline cleaning device has the following advantages:

(1) The diesel engine, the cleaning and liquid adjusting system and the control system are all concentrated in one frame box body, so that the operation is convenient, and the integration level is high;

(2) The diesel driven plunger pump is adopted, the problems of power consumption and the like are not considered, the restriction of the operation environment and conditions is avoided, and the blocking problem is solved to the greatest extent;

(3) The principle of the utility model is that clear water passes through the outlet pipeline from the water tank, then enters the outlet pipeline after being pressurized by the plunger pump, finally enters the sea pipe to raise the pressure in the sea pipe, and the blocking problem of the sea pipe is solved by utilizing the front-back pressure difference at the blocking position, so that the operation of the utility model is irrelevant to the type of medium in the submarine pipeline, and the cleaning and blocking operation of submarine pipelines with different mediums can be independently completed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a front view of a diesel-driven subsea pipeline block-removal device according to an embodiment of the present utility model;

FIG. 2 is a top view of a diesel-driven subsea pipeline block-removal device according to an embodiment of the present utility model;

fig. 3 is a process flow diagram of a diesel-driven submarine pipeline blockage removal device according to an embodiment of the utility model.

Reference numerals illustrate:

1. a skid-mounted bracket; 2. a water tank; 3. a booster pump; 4. a high pressure plunger pump; 5. a diesel engine; 6. a PLC control cabinet; 7. a monitor; 8. a water inlet pipe; 9. a water outlet pipe; 10. a pressure relief pipeline; 11. a water return line; 12. a manhole; 13. a water filling port; 14. an overflow port; 15. a discharge port; 16. a liquid level gauge; 17. a door panel; 18. guard bars; 19. and (5) climbing a ladder.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1-3, the utility model relates to a diesel driven submarine pipeline cleaning device, which comprises a skid-mounted support 1, wherein a water tank 2, a booster pump 3, a high-pressure plunger pump 4, a diesel engine 5, a PLC control cabinet 6 and a monitor 7 are arranged in the skid-mounted support 1, the output end of the diesel engine 5 is connected with the booster pump 3 through a belt, the water inlet of the booster pump 3 is connected with the water tank 2 through a water inlet pipe 8, the water outlet of the booster pump is connected with the water inlet of the high-pressure plunger pump 4 through a pipeline, and a filter screen is arranged at the position of the outlet of the water tank 2 connected with the water inlet pipe 8, so that the purpose of filtering cleaning liquid is realized. The water outlet of the high-pressure plunger pump 4 is connected with a water outlet pipe 9, a branch bypass is arranged on a pipeline of the water outlet pipe 9, a water return pipeline 11 is connected to the branch bypass, one end, away from the water outlet pipe 9, of the water return pipeline 11 is connected with the water tank 2, and the monitor 7 is electrically connected with the diesel engine 5 and the high-pressure plunger pump 4 respectively.

The water outlet of the high-pressure plunger pump 4 is also connected with a pressure relief pipeline 10, one end, away from the high-pressure plunger pump 4, of the pressure relief pipeline 10 is connected with the water tank 2, and a pressure relief valve is arranged on the pressure relief pipeline 10. When the blockage is seriously cleared in the submarine pipeline, the blockage cannot be completely cleared by one-time fluid impact, and the pressure in the submarine pipeline is too high, the pipeline is required to be decompressed in order to prevent the pressure from exceeding the bearable pressure of the pipeline, and when the pressure exceeds a certain value, the decompression valve is opened to automatically decompress the pressure to the water tank 2.

The outlet of the high-pressure plunger pump 4 is provided with two paths of stop valves DN50, one path of the stop valves is connected with a system for flushing the sea pipe, the other path of the stop valves is used for injecting the drug into water to carry out drug adding cleaning on the sea pipe, and the blocking cleaning effect is effectively improved.

A water inlet valve is arranged on the water inlet pipe 8; a stop valve and an electromagnetic flowmeter are arranged on the water outlet pipe 9, and the electromagnetic flowmeter is arranged at the rear end of the stop valve; an electric regulating valve is arranged on the water return pipeline 11, and according to the flow monitoring result of the electromagnetic flowmeter on the water outlet pipe 9, the electric regulating valve can automatically regulate and control the reflux quantity by realizing the reflux quantity, namely, the reflux quantity can be regulated by controlling the opening of the electric regulating valve on the water return pipeline 11, so that the control of the flow of the cleaning liquid is realized; the electromagnetic flowmeter and the electric regulating valve are respectively and electrically connected with the PLC control cabinet 6.

A water inlet pipeline of the high-pressure plunger pump 4 is provided with a pressure gauge and a pressure transmitter, and the position of the water outlet pipe 9, which is close to the water outlet of the high-pressure plunger pump 4, is provided with the pressure gauge and the pressure transmitter; the two pressure transmitters are respectively and electrically connected with the PLC control cabinet 6.

The side wall of the water tank 2 is provided with a water injection port 13, an overflow port 14, a discharge port 15 and a liquid level meter 16, the top end of the water tank 2 is provided with a manhole 12, the manhole 12 facilitates personnel to enter the water tank 2 for maintenance, and a temperature transmitter is arranged in the water tank 2; the water injection port 13 is provided with an electromagnetic regulating valve, the overflow port 14 is provided with an overflow valve and a quick connector, when the liquid level of the water tank 2 is too high, liquid can be automatically discharged through the overflow valve, overflow from the top after the water tank 2 is full is prevented, when the device is started, the overflow valve is required to be opened at first, and a hose is connected through the quick connector of the overflow valve, so that overflow liquid is discharged into a specified area. The liquid level meter 16 is provided with a liquid level transmitter, and meanwhile, the temperature transmitter, the electromagnetic regulating valve and the liquid level transmitter are respectively and electrically connected with the PLC control cabinet 6. When the water tank 2 reaches a low liquid level, the liquid level transmitter transmits signals to the electromagnetic regulating valve of the water injection port 13 pipeline of the water tank 2, the electromagnetic regulating valve is opened at the moment, clean water enters the water tank 2 to increase the water quantity, and when the liquid level of the water tank 2 reaches a high liquid level, the electromagnetic regulating valve is closed to ensure that the water level in the water tank 2 is stable. In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "front", "rear", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The door plate 17 that is provided with around the sled dress support 1 can open or close, makes things convenient for operating personnel to open the dodge gate and carries out various operations, the top of sled dress support 1 corresponds water tank 2 position department is provided with guardrail 18, the side of sled dress support 1 is provided with cat ladder 19, and when the staff climbs sled dress support 1 top through cat ladder 19, guardrail 18 can form certain protection to the staff.

The PLC control cabinet 6 is provided with a touch screen, has an explosion-proof grade of ExdIIBT4 and a protection grade of IP65, and is used for monitoring the whole cleaning process and displaying the process flow, realizing signal feedback of a pressure transmitter and a temperature transmitter, signal feedback of instantaneous flow and accumulated flow of an electromagnetic flowmeter, opening and closing an electric regulating valve and an electromagnetic regulating valve, and alarming and feeding back liquid level signals of a liquid level meter 16; the monitor 7 is used for controlling the diesel engine 5 and the high-pressure plunger pump 4 to work.

The pressure transmitter is made of 316L, the protection level is IP66, and the explosion-proof level is ExdIIBT4; the material of the liquid level meter 16 is 316L, the protection level is IP66, and the explosion-proof level is ExdIIBT4; the temperature transmitter is made of 316L, the protection level is IP66, and the explosion-proof level is ExdIIBT4; the electromagnetic flowmeter is 316L in material quality, IP66 in protection level and ExdIIBT4 in explosion-proof level.

The outlet of the high-pressure plunger pump 4 is provided with a turbulent flow plate, so that irregular flow of fluid in the pipeline is prevented when the front-rear pressure difference of the pipeline is large and the flow speed is suddenly increased.

In the utility model, the equipment for solving the problem of sea pipe blockage by the high-pressure plunger pump 4 mainly comprises the following parts: 1 plunger pump unit, 1 water tank 2, 1 PLC switch board 6, spare parts such as connecting tube and valve. The high-pressure plunger pump 4 is core equipment for solving the problem of blockage of the cleaning ball and is used for improving the pressure in the sea pipe; the water tank 2 is used for containing the medium conveyed by the pump; the PLC control cabinet 6 controls the liquid level of the water tank 2 and the opening degree of each solenoid valve.

Before the pipeline blockage is solved, clean water is injected into the water tank 2 through the water injection system. After meeting the process operation requirement (when the liquid level in the water tank 2 reaches a high liquid level), the diesel engine 5 and the high-pressure plunger pump 4 are started, clean water is pressurized by the booster pump 3 and the high-pressure plunger pump 4 sequentially after passing through an outlet pipeline of the water tank 2, and a pressure gauge and a pressure transmitter are respectively arranged on an inlet pipeline and an outlet pipeline of the high-pressure plunger pump 4 and are used for monitoring the pressure of the inlet pipeline and the outlet pipeline so as to adjust the pressure to an expected value based on the monitoring result. An electromagnetic flowmeter is arranged on an outlet pipeline of the high-pressure plunger pump 4, and fluid flow in the pipeline is monitored to realize the control of the fluid flow of the main pipeline. Meanwhile, a turbulent flow plate is arranged at the outlet of the high-pressure plunger pump 4, so that irregular flow of fluid in the pipeline is prevented when the front-rear pressure difference of the pipeline is large and the flow speed is suddenly increased. Along with the process of clearing the submarine pipeline, water in the water tank 2 is continuously reduced, when the liquid level reaches a low level, a liquid level transmitter transmits a signal to an electromagnetic regulating valve of a water injection port 13 pipeline of the water tank 2, at the moment, the electromagnetic regulating valve is opened, clean water enters the water tank 2 to increase the water quantity, and when the liquid level of the water tank 2 reaches a high level, the electromagnetic regulating valve is closed to ensure that the water level in the water tank 2 is stable. Meanwhile, a pressure release valve is arranged at an outlet bypass of the high-pressure plunger pump 4, so that pressure of the submarine pipeline can be automatically released to the water tank 2.

The submarine pipeline blockage removing process is a process that clear water passes through a pipeline from a water tank 2, then enters a water outlet pipe 9 after being pressurized by a high-pressure plunger pump 4, finally enters a submarine pipeline to increase the pressure in the submarine pipeline, and the blockage problem of the submarine pipeline is solved by utilizing the front-back pressure difference at the blockage position.

Aiming at the blocking phenomenon in the submarine pipeline cleaning process, the cleaning operation is ensured not to be restricted by the conditions of offshore platform operation space, equipment hoisting, electricity consumption requirement and the like, and the size, weight and driving mode of the integral skid-mounted device can meet the offshore platform operation requirement at any time. The special design is a diesel oil driven submarine pipeline cleaning device, the device mainly comprises a water tank 2, a high-pressure plunger pump 4 group, a connecting pipeline and a control system, the risk of the offshore oil platform cleaning operation is fully considered, the skid-mounted system is provided with corresponding safety protection functions such as a filter, an overflow valve, a safety valve and a pressure relief valve, and the like. The diesel oil driving type submarine pipeline cleaning device is adopted, the bearable maximum pressure range is 6-8MPa, the working condition of the offshore platform is met, the problems of power consumption and the like are not needed to be considered by the diesel oil driving type plunger pump, the problem of blockage is solved to the greatest extent due to the restriction of the working environment and the conditions, and the key technical parameters of the diesel oil driving type submarine pipeline cleaning device are as follows: the running flow is 50m3/H, the lift is 800m, and the material is as follows: 2205; the water inlet pressure is more than or equal to 0.2Mpa; diesel drive: diesel engine type 5: in-line, 4-stroke, water-cooled, wet cylinder liners; cylinder number/valve number: 6/24; cylinder diameter/stroke: 126mm/130mm; rated power/speed: 266KW/2200PRM.

In the actual working process, firstly, the diesel oil driven submarine pipeline blockage removing device is transported to a cleaning site, a water injection system is connected with a water injection port 13 pipeline arranged above the water tank 2, water is injected into the water tank 2, and the water injection system is an existing foundation. The water outlet pipe 9 of the outlet pipeline of the high-pressure plunger pump 4 is connected with a temporary pipeline blocked at the inlet of the sea pipe, the water injection system injects water into the water tank 2, the diesel engine 5 and the high-pressure plunger pump 4 are started, cleaning liquid is input into the sea pipe for cleaning operation, and meanwhile, the other end of the sea pipe is provided with a device for recovering the cleaning liquid, and the device for recovering the cleaning liquid is an existing foundation. The pressure of the high-pressure plunger pump 4 and the flow rate of the cleaning fluid can be checked in real time through the PLC control cabinet 6, when the submarine pipeline is seriously blocked by cleaning, and the pressure in the submarine pipeline is too high due to the fact that the submarine pipeline cannot be completely blocked by one-time fluid impact, the pressure can be born by the pipeline for preventing the pressure from exceeding, the pressure release valve can automatically release the pressure to the water tank 2 at the moment, the opening of the electric control valve on the water return pipeline 11 can be controlled to adjust the reflux rate, and the control of the flow rate of the cleaning fluid is realized. The outlet of the high-pressure plunger pump 4 is provided with two paths of stop valves DN50, one path of the stop valves is connected with a system flushing sea pipe, the other path of the stop valves is used for injecting a medicine into water, and the sea pipe is subjected to medicine adding cleaning.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (9)

1. A diesel oil driven submarine pipeline cleaning device is characterized in that: including sled dress support (1), install water tank (2), booster pump (3), high-pressure plunger pump (4), diesel engine (5) and PLC switch board (6) and monitor (7) in sled dress support (1), the output of diesel engine (5) with booster pump (3) are connected, the water inlet of booster pump (3) pass through inlet tube (8) with water tank (2) are connected, its delivery port pass through the pipeline with the water inlet of high-pressure plunger pump (4) is connected, the delivery port of high-pressure plunger pump (4) is connected with outlet pipe (9), be provided with branch bypass on the pipeline of outlet pipe (9), be connected with return water pipeline (11) on the branch bypass, return water pipeline (11) are kept away from the one end of outlet pipe (9) is connected with water tank (2), monitor (7) and diesel engine (5), high-pressure plunger pump (4) are electric connection respectively.

2. A diesel-driven submarine pipeline cleaning device according to claim 1, wherein: the water outlet of the high-pressure plunger pump (4) is further connected with a pressure relief pipeline (10), one end, far away from the high-pressure plunger pump (4), of the pressure relief pipeline (10) is connected with the water tank (2), and a pressure relief valve is arranged on the pressure relief pipeline (10).

3. A diesel-driven submarine pipeline cleaning device according to claim 1, wherein: a water inlet valve is arranged on the water inlet pipe (8); a stop valve and an electromagnetic flowmeter are arranged on the water outlet pipe (9), and the electromagnetic flowmeter is arranged at the rear end of the stop valve; an electric regulating valve is arranged on the return pipeline (11), and the electric regulating valve can realize automatic regulation and control of the return flow according to the flow monitoring result of the electromagnetic flowmeter on the water outlet pipe (9); the electromagnetic flowmeter and the electric regulating valve are respectively and electrically connected with the PLC control cabinet (6).

4. A diesel-driven submarine pipeline cleaning device according to claim 3, wherein: a water inlet pipeline of the high-pressure plunger pump (4) is provided with a pressure gauge and a pressure transmitter, and a water outlet pipe (9) is provided with the pressure gauge and the pressure transmitter close to a water outlet of the high-pressure plunger pump (4); the two pressure transmitters are respectively and electrically connected with the PLC control cabinet (6).

5. A diesel-driven submarine pipeline cleaning device according to claim 4, wherein: a water filling port (13), an overflow port (14), a discharge port (15) and a liquid level meter (16) are arranged on the side wall of the water tank (2), a manhole (12) is arranged at the top end of the water tank (2), and a temperature transmitter is arranged in the water tank (2); the water injection port (13) is provided with an electromagnetic regulating valve, the overflow port (14) is provided with an overflow valve and a quick connector, the liquid level meter (16) is provided with a liquid level transmitter, and meanwhile, the temperature transmitter, the electromagnetic regulating valve and the liquid level transmitter are respectively and electrically connected with the PLC control cabinet (6).

6. A diesel-driven submarine pipeline cleaning device according to claim 1, wherein: the novel water tank is characterized in that door plates (17) capable of being opened or closed are arranged around the skid-mounted support (1), guardrails (18) are arranged at positions, corresponding to the water tank (2), of the top of the skid-mounted support (1), and a cat ladder (19) is arranged on the side face of the skid-mounted support (1).

7. A diesel-driven submarine pipeline cleaning device according to claim 5, wherein: the PLC control cabinet (6) is provided with a touch screen, has an explosion-proof grade of ExdIIBT4 and a protection grade of IP65, and is used for monitoring the whole cleaning process and displaying the process flow, so that signal feedback of a pressure transmitter and a temperature transmitter, signal feedback of instantaneous flow and accumulated flow of an electromagnetic flowmeter, opening and closing of an electric regulating valve and an electromagnetic regulating valve, high and low liquid level alarm of a liquid level meter (16) and liquid level signal feedback are realized; the monitor (7) is used for controlling the diesel engine (5) and the high-pressure plunger pump (4) to work.

8. A diesel-driven submarine pipeline cleaning device according to claim 5, wherein: the pressure transmitter is made of 316L, the protection level is IP66, and the explosion-proof level is ExdIIBT4; the material of the liquid level meter (16) is 316L, the protection level is IP66, and the explosion-proof level is ExdIIBT4; the temperature transmitter is made of 316L, the protection level is IP66, and the explosion-proof level is ExdIIBT4; the electromagnetic flowmeter is 316L in material quality, IP66 in protection level and ExdIIBT4 in explosion-proof level.

9. A diesel-driven submarine pipeline cleaning device according to claim 1, wherein: the outlet of the high-pressure plunger pump (4) is provided with a turbulence plate.