Seawater Cooling Pipeline Mechanism of Marine Internal Combustion Engine Generator

Abstract

The present invention relates to the technical field of internal combustion engine cooling, in particular to a seawater cooling pipeline mechanism for a marine internal combustion engine generator, comprising an equipment casing and an internal combustion engine module, a generator module and a cooler arranged inside the equipment casing, wherein the internal combustion engine module drives the generator module to operate for generating electricity, a synchronous water pump is fixedly arranged in the equipment casing, and a seawater inlet pipe and a seawater outlet pipe are arranged on the synchronous water pump; the present invention enables the internal combustion engine module to start and drive the synchronous water pump to operate in the initial stage, and the cooling seawater refluxes and circulates through the outer pipe of the bridge, so as to avoid the cooling seawater entering the cooler and taking away the heat of the internal combustion engine module, so that the internal combustion engine module can be quickly heated up to reach the optimal working temperature, and the low-temperature wear and fuel consumption are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engine cooling, and particularly to a seawater cooling pipeline mechanism for a marine internal combustion engine generator. Background Art

[0002] An internal combustion engine generator device is a device that drives a generator to rotate through an internal combustion engine, thereby achieving power generation. It is widely used in various emergency power supply places. The internal combustion engine and the generator will generate a large amount of heat during operation. Since the ship is sailing in the sea, the lowest-cost heat dissipation method for a marine internal combustion engine generator is to extract seawater for heat exchange to achieve heat dissipation. When extracting seawater, a water pump needs to be set up. The drive of the water pump is usually connected to the internal combustion engine through a pulley. While the internal combustion engine rotates to drive the generator to rotate, it also drives the water pump to operate to extract and drive seawater; in actual use, there are certain limitations. In the initial stage when the internal combustion engine module is just started, since the water pump is connected to the internal combustion engine through a pulley, when the internal combustion engine starts, the water pump will follow and start, taking away the heat of the internal combustion engine. However, in the early warming-up stage when the internal combustion engine is just started, the working efficiency is low, the fuel consumption is greater, and the low-temperature wear is more serious. Taking away the heat of the internal combustion engine at this time has certain negative impacts. Summary of the Invention

[0003] The purpose of the present invention is to provide a seawater cooling pipeline mechanism for a marine internal combustion engine generator to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A seawater cooling pipeline mechanism for a marine internal combustion engine generator, including an equipment housing and an internal combustion engine module, a generator module, and a cooler arranged inside the equipment housing. The internal combustion engine module drives the generator module to operate for power generation. A synchronous water pump is fixedly arranged in the equipment housing. A seawater inlet pipe and a seawater outlet pipe are arranged on the synchronous water pump. A secondary delivery pipe is externally connected to the cooler. A control pipeline is arranged between the seawater outlet pipe and the secondary delivery pipe. When the synchronous water pump operates, seawater is extracted through the seawater inlet pipe and output through the seawater outlet pipe. The seawater sequentially passes through the control pipeline and the secondary delivery pipe and enters the cooler. The cooler cools and exchanges heat with the internal combustion engine module and the generator module. A front filter section is arranged on the seawater inlet pipe, and the front filter section is used to filter the seawater flowing in the seawater inlet pipe.

[0005] The control pipeline includes a switching pipe section, a sealing coil pipe section, and a right-angle connecting section. The switching pipe section, the sealing coil pipe section, and the right-angle connecting section are sequentially connected end to end. The seawater outlet pipe is connected to the switching pipe section, and the secondary delivery pipe is connected to the right-angle connecting section. The inner diameter of the pipe of the sealing coil pipe section is larger than the inner diameter of the pipe of the switching pipe section.

[0006] The switching pipe section is penetrated with strip-shaped reflux grooves. The strip-shaped reflux grooves are strip-shaped, and the length direction of the strip-shaped reflux grooves is parallel to the axis direction of the switching pipe section. An external bridge-through outer pipe is arranged outside the switching pipe section. One end of the bridge-through outer pipe is communicated with the strip-shaped reflux groove, and the other end of the bridge-through outer pipe is communicated with the seawater inlet pipe. The communication port between the bridge-through outer pipe and the seawater inlet pipe is located in a section area between the front-end filtering section and the synchronous water pump.

[0007] A sealing ring sleeve is arranged inside the switching pipe section. The sealing ring sleeve is circular tubular and has openings at both ends. The sealing ring sleeve axially moves to adjust and block and seal the strip-shaped reflux groove. A support wing plate is fixedly arranged inside the sealing ring sleeve, and a central shaft body is fixedly arranged on the support wing plate.

[0008] A fixed sealing disc is arranged inside the sealing pipe section. The fixed sealing disc is fixedly installed with the central shaft body. The axial movement of the central shaft body can drive the fixed sealing disc to move. When the sealing ring sleeve is completely staggered with the strip-shaped reflux groove, making the strip-shaped reflux groove fully open, the fixed sealing disc will block at the end position of the switching pipe section, disconnecting the communication between the switching pipe section and the sealing pipe section.

[0009] A control pipe body is fixedly arranged on the right-angle communication section. A sealing inner ring part is arranged between the control pipe body and the right-angle communication section. One end of the central shaft body penetrates through the sealing inner ring part and extends into the control pipe body. The central shaft body is in sealing contact with the sealing inner ring part. A control piston is arranged inside the control pipe body. The control piston is in sealing contact with the inner wall surface of the control pipe body. The control piston is fixedly installed with the central shaft body.

[0010] A return spring is arranged on the side of the control piston away from the position where the central shaft body is located. The surface of the control pipe body is penetrated with pressure equalizing air windows, which are used to balance the side air pressure when the control piston moves. A limiting top shaft is coaxially arranged inside the control pipe body, which is used to support and limit the control piston. An air pressure control pipe is communicated and arranged outside the control pipe body. The other end of the air pressure control pipe is communicated and arranged with a variable pressure air cavity. The variable pressure air cavity is a hollow metal cavity structure. The variable pressure air cavity is in heat conduction contact with the internal combustion engine module. When the temperature of the internal combustion engine module rises, the variable pressure air cavity can be heated, causing the gas inside the variable pressure air cavity to expand and the pressure to rise. The communication port between the air pressure control pipe and the control pipe body is located between the sealing inner ring part and the control piston. When the internal pressure of the variable pressure air cavity rises, positive pressure gas enters between the sealing inner ring part and the control piston through the air pressure control pipe, driving the control piston to axially move.

[0011] On one side of the control piston facing the limiting top shaft, a secondary central groove is provided. Inside the secondary central groove, a secondary piston is arranged. The secondary central groove is in sealed contact with the secondary piston. An accommodation ring groove is provided on the secondary piston. A connecting spring is arranged between the accommodation ring groove and the inner wall surface of the secondary central groove. An inner cavity pipeline is provided inside the central shaft body, and the inner cavity pipeline is communicated with the secondary central groove.

[0012] A rubber outer sleeve is sleeved outside the plugging ring sleeve. The plugging ring sleeve and the rubber outer sleeve are hermetically bonded. The plugging ring sleeve contacts the inner wall surface of the switching pipe joint through the rubber outer sleeve. An air ring chamber and a connecting pipeline are provided in the rubber outer sleeve. The air ring chamber is communicated with the inner cavity pipeline through the connecting pipeline. Incompressible liquid media are filled in the inner cavity pipeline, the secondary central groove and the air ring chamber.

[0013] A water pump pulley is arranged on the synchronous water pump. The internal combustion engine module drives the water pump pulley to rotate through belt transmission, so that the synchronous water pump works. A seawater filtering layer is arranged in the front-end filtering section. When seawater flows through the seawater filtering layer, impurities can be filtered out.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] Through the control pipeline arranged in the seawater cooling pipeline mechanism of the present invention, in the initial stage when the internal combustion engine module starts and drives the synchronous water pump to operate, the cooling seawater can flow back and circulate through the bridge-through outer pipe, avoiding the cooling seawater from entering the cooler to take away the heat of the internal combustion engine module, enabling the internal combustion engine module to quickly heat up to the optimal working temperature, reducing low-temperature wear and fuel consumption; and through the backflow circulation of the above structure, at the same time, the rotation resistance of the synchronous water pump can be reduced, making the load at the moment when the internal combustion engine module starts lower and the start more smooth. During the backflow circulation process, the front-end filtering section does not continuously filter seawater, prolonging the service life of the front-end filtering section. As the internal combustion engine module heats up, the control pipeline gradually increases the flow rate of the cooling seawater input into the cooler, gradually reaching the maximum state to achieve automatic control.

[0016] Through the cooperation of structures such as the secondary central groove, the limiting top shaft and the air ring chamber arranged in the present invention, when the plugging ring sleeve completely closes the strip-shaped backflow groove, the contact pressure between the rubber outer sleeve and the inner wall surface of the switching pipe joint can be automatically increased, further improving the sealing performance of the strip-shaped backflow groove and avoiding leakage and backflow at the bridge-through outer pipe during the process of supplying water to the cooler for cooling at the maximum flow rate, which affects the working efficiency of the synchronous water pump. When the plugging ring sleeve opens the strip-shaped backflow groove, the contact pressure between the rubber outer sleeve and the inner wall surface of the switching pipe joint can be automatically reduced, avoiding excessive wear and consumption. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of a cutaway housing of the device of the present invention.

[0019] Figure 3 It is a three-dimensional half-section schematic diagram of the seawater output pipe of the present invention.

[0020] Figure 4 for Figure 3 A magnified schematic diagram of area A in the middle.

[0021] Figure 5 for Figure 4 Enlarged schematic diagram of area C in the middle.

[0022] Figure 6 for Figure 3 Enlarged schematic diagram of area B in the middle.

[0023] Figure 7 for Figure 6 Enlarged schematic diagram of area D in the middle.

[0024] Figure 8 It is a three-dimensional half-section front view of the seawater output pipe of the present invention.

[0025] Figure 9 It is a three-dimensional half-section schematic diagram of the seawater output pipe of the present invention at a horizontal angle.

[0026] Figure 10 for Figure 9 Enlarged schematic diagram of area E in the middle.

[0027] In the figure: 1. Equipment housing; 2. Internal combustion engine module; 3. Generator module; 4. Cooler; 5. Seawater inlet pipe; 6. Synchronous water pump; 7. Seawater outlet pipe; 8. Secondary delivery pipe; 9. Front filter section; 701. Switching pipe section; 702. Sealing disc pipe section; 703. Right-angle connecting section; 704. Strip reflux groove; 705. Bridge outer pipe; 706. Sealing ring sleeve; 707. Support wing plate; 708. Central axis; 709. Fixed sealing disc; 710. Control pipe body; 711, sealing inner ring; 712, control piston; 713, return spring; 714, pressure equalizing air window; 715, limit top shaft; 716, air pressure control tube; 717, variable pressure air cavity; 718, secondary center groove; 719, secondary piston; 720, accommodating ring groove; 721, connecting spring; 722, inner cavity pipeline; 723, rubber jacket; 724, air ring chamber; 725, connecting pipeline; 601, water pump pulley; 901, seawater filter layer. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1 to 10 , the present invention provides a technical solution: a seawater cooling pipeline mechanism for a marine internal combustion engine generator, as Figure 1 shown in, which includes an equipment housing 1, an internal combustion engine module 2, a generator module 3 and a cooler 4 arranged inside the equipment housing 1. The internal combustion engine module 2 is a diesel engine, and the cooler 4 is a heat exchange device. The coolant in the internal combustion engine module 2 and the generator module 3 exchanges heat with the cooling seawater in the cooler 4. An isolation layer is provided in the middle of the cooler 4 to prevent seawater from entering the coolant of the internal combustion engine module 2 and the generator module 3, that is, the seawater does not directly flow into the internal combustion engine module 2 and the generator module 3, and only exchanges heat with the circulating coolant in the internal combustion engine module 2 and the generator module 3, avoiding the problem of seawater corrosion.

[0030] The internal combustion engine module 2 drives the generator module 3 to operate for power generation. A synchronous water pump 6 is fixedly arranged in the equipment housing 1. A seawater inlet pipe 5 and a seawater outlet pipe 7 are arranged on the synchronous water pump 6. A secondary delivery pipe 8 is externally connected to the cooler 4. A control pipeline is arranged between the seawater outlet pipe 7 and the secondary delivery pipe 8. When the synchronous water pump 6 operates, seawater is pumped through the seawater inlet pipe 5 and output through the seawater outlet pipe 7. The seawater sequentially passes through the control pipeline and the secondary delivery pipe 8 and enters the cooler 4. The cooler 4 cools and exchanges heat with the internal combustion engine module 2 and the generator module 3. A front-end filter section 9 is arranged on the seawater inlet pipe 5, and the front-end filter section 9 is used to filter the seawater flowing in the seawater inlet pipe 5.

[0031] The control pipeline includes a switching pipe section 701, a sealing coil pipe section 702 and a right-angle connecting section 703. The switching pipe section 701, the sealing coil pipe section 702 and the right-angle connecting section 703 are connected end to end in sequence. The seawater outlet pipe 7 is connected to the switching pipe section 701, and the secondary delivery pipe 8 is connected to the right-angle connecting section 703. The inner diameter of the pipe of the sealing coil pipe section 702 is larger than the inner diameter of the pipe of the switching pipe section 701. A strip-shaped return groove 704 is penetrated and opened on the switching pipe section 701. The strip-shaped return groove 704 is in a long strip shape, and the length direction of the strip-shaped return groove 704 is parallel to the axis direction of the switching pipe section 701. A bridge-through outer pipe 705 is arranged outside the switching pipe section 701. One end of the bridge-through outer pipe 705 is connected to the strip-shaped return groove 704, and the other end of the bridge-through outer pipe 705 is connected to the seawater inlet pipe 5. The communication port between the bridge-through outer pipe 705 and the seawater inlet pipe 5 is located in a section area between the front-end filter section 9 and the synchronous water pump 6.

[0032] Inside the switching pipe section 701, a sealing ring sleeve 706 is provided. The sealing ring sleeve 706 is circular tubular with openings at both ends. The sealing ring sleeve 706 adjusts the occlusion and closure of the strip-shaped return groove 704 through axial movement. Inside the sealing ring sleeve 706, a support wing plate 707 is fixedly provided, and a central shaft body 708 is fixedly provided on the support wing plate 707. Inside the sealing pipe section 702, a fixed sealing plate 709 is provided. The fixed sealing plate 709 is fixedly installed with the central shaft body 708. Through the axial movement of the central shaft body 708, the fixed sealing plate 709 can be driven to move. When the sealing ring sleeve 706 is completely staggered from the strip-shaped return groove 704, making the strip-shaped return groove 704 fully open, the fixed sealing plate 709 will block the end position of the switching pipe section 701, disconnecting the connection between the switching pipe section 701 and the sealing pipe section 702.

[0033] On the right-angle connecting section 703, a control pipe body 710 is fixedly provided. Between the control pipe body 710 and the right-angle connecting section 703, a sealing inner ring part 711 is provided. One end of the central shaft body 708 penetrates through the sealing inner ring part 711 and extends into the control pipe body 710. The central shaft body 708 is in sealing contact with the sealing inner ring part 711. Inside the control pipe body 710, a control piston 712 is provided. The control piston 712 is in sealing contact with the inner wall surface of the control pipe body 710. The control piston 712 is fixedly installed with the central shaft body 708.

[0034] On the side of the control piston 712 away from the position of the central shaft body 708, a return spring 713 is provided. A pressure equalizing air window 714 is penetrated and opened on the surface of the control pipe body 710. The pressure equalizing air window 714 is used to balance the side air pressure when the control piston 712 moves. Inside the control pipe body 710, a limiting top shaft 715 is coaxially provided. The limiting top shaft 715 is used to support and limit the control piston 712. The outside of the control pipe body 710 is communicatively connected with a pneumatic control pipe 716. The other end of the pneumatic control pipe 716 is communicatively connected with a variable pressure air cavity 717. The variable pressure air cavity 717 is a hollow metal cavity structure. The variable pressure air cavity 717 is in thermal contact with the internal combustion engine module 2. When the temperature of the internal combustion engine module 2 rises, the variable pressure air cavity 717 can be heated, causing the gas inside the variable pressure air cavity 717 to expand and the pressure to increase. The communication port between the pneumatic control pipe 716 and the control pipe body 710 is between the sealing inner ring part 711 and the control piston 712. When the pressure inside the variable pressure air cavity 717 increases, positive pressure gas enters between the sealing inner ring part 711 and the control piston 712 through the pneumatic control pipe 716, driving the control piston 712 to axially move.

[0035] On the side of the control piston 712 facing the limit top shaft 715, a secondary central groove 718 is provided. Inside the secondary central groove 718, a secondary piston 719 is arranged. There is a sealed contact between the secondary central groove 718 and the secondary piston 719. An accommodation ring groove 720 is provided on the secondary piston 719. A connecting spring 721 is arranged between the accommodation ring groove 720 and the inner wall surface of the secondary central groove 718. Inside the central shaft body 708, an inner cavity pipeline 722 is provided. The inner cavity pipeline 722 communicates with the secondary central groove 718.

[0036] An outer rubber sleeve 723 is sleeved outside the plugging ring sleeve 706. The plugging ring sleeve 706 can be made of hard materials such as metal. The outer rubber sleeve 723 is made of rubber soft material. The plugging ring sleeve 706 and the outer rubber sleeve 723 are hermetically bonded to avoid air leakage. The plugging ring sleeve 706 contacts the inner wall surface of the switching pipe section 701 through the outer rubber sleeve 723. An air ring chamber 724 and a connecting pipeline 725 are provided in the outer rubber sleeve 723. The air ring chamber 724 communicates with the inner cavity pipeline 722 through the connecting pipeline 725. Incompressible liquid media such as water or oil are filled in the inner cavity pipeline 722, the secondary central groove 718 and the air ring chamber 724, which can conduct the extrusion of the secondary piston 719 and reduce the loss of medium compression.

[0037] A water pump pulley 601 is provided on the synchronous water pump 6. The internal combustion engine module 2 drives the rotation of the water pump pulley 601 through belt drive, so that the synchronous water pump 6 works. A seawater filtering layer 901 is provided in the front-end filtering section 9. When seawater flows through the seawater filtering layer 901, impurities can be filtered out.

[0038] When the seawater cooling pipeline mechanism of the present invention is in use, the seawater inlet pipe 5 communicates with the outside seawater. After the internal combustion engine module 2 has been shut down and cooled for a long time, since the variable pressure air cavity 717 is at ambient temperature and the gas inside has not expanded significantly, at this time, as Figure 4 、 Figure 5 、 Figure 6 and Figure 7 shown, under the elastic pressure of the return spring 713, the control piston 712 is at one end close to the sealing inner ring part 711; the fixed sealing disc 709 presses on the end position of the switching pipe section 701, so that the switching pipe section 701 and the sealing pipe section 702 are shut off, and the plugging ring sleeve 706 is completely staggered from the strip-shaped return groove 704, so that the strip-shaped return groove 704 is completely opened.

[0039] When the internal combustion engine module 2 is started, it drives the synchronous water pump 6 to rotate synchronously. At this time, the seawater output by the synchronous water pump 6 through the seawater output pipe 7 flows back to the bridge outer pipe 705 through the strip reflux groove 704, then enters the seawater inlet pipe 5, is re-absorbed into the synchronous water pump 6, and then ejected through the seawater output pipe 7 to achieve a reflux cycle. At this time, the cooling seawater will not enter the cooler 4 to take away the heat of the internal combustion engine module 2, so that the internal combustion engine module 2 can quickly heat up in the early stage of startup. And the above-mentioned reflux can greatly reduce the rotation resistance of the synchronous water pump 6, so that the load of the internal combustion engine module 2 at the moment of startup is lower. When the synchronous water pump 6 is working normally, it needs to overcome the large inlet and outlet pressure difference to transport water. This pressure difference will cause a large rotation resistance. After the connection, the pressure difference is reduced, so that the rotation resistance of the synchronous water pump 6 is reduced. And during the above-mentioned reflux cycle, the front filter section 9 will not filter new seawater, which can avoid the life loss of the front filter section 9.

[0040] As the temperature of the internal combustion engine module 2 rises, the temperature is transferred to the pressure-changing air cavity 717 to heat the pressure-changing air cavity 717, so that the air pressure inside the pressure-changing air cavity 717 gradually increases. Figure 6 and Figure 7 As shown in FIG. , the air pressure enters between the sealing inner ring portion 711 and the control piston 712 through the air pressure control tube 716, pushing the control piston 712 to gradually move to the right, driving the central axis 708 to gradually move to the right, as shown in FIG. Figure 4 As shown in the figure, when the central axis 708 gradually moves to the right, the sealing disk 709 is first fixed and opened, so that the switching pipe section 701 and the sealing disk pipe section 702 are connected, and then the sealing ring sleeve 706 gradually blocks and closes the strip reflux groove 704. In this process, the flow rate of seawater flowing into the cooler 4 gradually increases, and the heat dissipation effect is gradually improved.

[0041] like Figure 7 As shown in , when the control piston 712 continues to move, the secondary piston 719 is squeezed and contacted with the limiting top shaft 715. By applying pressure to the secondary piston 719, the medium in the secondary center groove 718 enters the air ring chamber 724 through the inner cavity pipeline 722, causing the air ring chamber 724 to expand and swell, thereby increasing the contact pressure between the rubber jacket 723 and the inner wall surface of the switching pipe segment 701, and further improving the sealing performance of the strip reflux groove 704, thereby avoiding leakage and reflux at the bridge outer pipe 705 during the process of supplying water to the cooler 4 at the maximum flow rate, thereby affecting the working efficiency of the synchronous water pump 6. When the sealing ring sleeve 706 opens the strip reflux groove 704, the contact pressure between the rubber jacket 723 and the inner wall surface of the switching pipe segment 701 can be automatically reduced to avoid excessive wear and consumption.

[0042] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seawater cooling pipeline mechanism for a marine internal combustion engine generator, comprising an equipment casing (1) and an internal combustion engine module (2), a generator module (3) and a cooler (4) arranged inside the equipment casing (1), wherein the internal combustion engine module (2) drives the generator module (3) to operate and generate electricity, and is characterized in that: A synchronous water pump (6) is fixedly arranged in the equipment housing (1), and a seawater inlet pipe (5) and a seawater outlet pipe (7) are arranged on the synchronous water pump (6). A secondary delivery pipe (8) is arranged to be connected to the outside of the cooler (4), and a control pipeline is arranged between the seawater outlet pipe (7) and the secondary delivery pipe (8). When the synchronous water pump (6) is in operation, seawater is extracted through the seawater inlet pipe (5) and output through the seawater outlet pipe (7). The seawater enters the cooler (4) through the control pipeline and the secondary delivery pipe (8) in sequence, and the internal combustion engine module (2) and the generator module (3) are cooled and heat-exchanged through the cooler (4). A front-end filter section (9) is arranged on the seawater inlet pipe (5), and the front-end filter section (9) is used to filter the seawater flowing in the seawater inlet pipe (5); The control pipeline comprises a switching pipe section (701), a sealing coil pipe section (702) and a right-angle connecting section (703), and also comprises a sealing ring sleeve (706), a central shaft body (708), a control pipe body (710), a sealing inner ring portion (711) and a control piston (712); A return spring (713) is arranged on one side of the control piston (712) away from the central axis (708); a limit top shaft (715) is coaxially arranged inside the control tube body (710); the limit top shaft (715) is used to support and limit the control piston (712); an air pressure control tube (716) is arranged on the outside of the control tube body (710); the other end of the air pressure control tube (716) is arranged on the other end of the air pressure control tube (716); the pressure-changing air cavity (717) is a hollow metal cavity structure; The air cavity (717) is in heat-conducting contact with the internal combustion engine module (2); the communication port between the air pressure control tube (716) and the control tube body (710) is located between the sealed inner ring portion (711) and the control piston (712); when the internal pressure of the variable pressure air cavity (717) increases, the positive pressure gas enters between the sealed inner ring portion (711) and the control piston (712) through the air pressure control tube (716), driving the control piston (712) to move axially; the control piston (712) is provided with a secondary center groove (716) on one side facing the limit top shaft (715) 18), a secondary piston (719) is arranged inside the secondary center groove (718), the secondary center groove (718) and the secondary piston (719) are in sealed contact, a receiving ring groove (720) is provided on the secondary piston (719), a connecting spring (721) is connected between the receiving ring groove (720) and the inner wall surface of the secondary center groove (718), an inner cavity pipeline (722) is provided inside the central shaft body (708), and the inner cavity pipeline (722) is communicated with the secondary center groove (718); The sealing ring sleeve (706) is provided with a rubber outer sleeve (723) on the outside, and the sealing ring sleeve (706) is in contact with the inner wall surface of the switching pipe section (701) through the rubber outer sleeve (723). An air ring chamber (724) and a connecting pipeline (725) are provided in the rubber outer sleeve (723). The air ring chamber (724) is connected to the inner cavity pipeline (722) through the connecting pipeline (725), and the inner cavity pipeline (722), the secondary central groove (718) and the air ring chamber (724) are all filled with an incompressible liquid medium.

2. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 1, characterized in that: The switching pipe section (701), the sealing coil pipe section (702) and the right-angle connecting section (703) are connected end to end in sequence; the seawater output pipe (7) is connected to the switching pipe section (701); the secondary delivery pipe (8) is connected to the right-angle connecting section (703); and the inner diameter of the sealing coil pipe section (702) is larger than the inner diameter of the switching pipe section (701).

3. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 2, characterized in that: The switch pipe section (701) is provided with a strip-shaped reflux groove (704) extending therethrough. The strip-shaped reflux groove (704) is in a long strip shape, and the length direction of the strip-shaped reflux groove (704) is parallel to the axial direction of the switch pipe section (701). The switch pipe section (701) is provided with a bridge outer tube (705) on the outside. One end of the bridge outer tube (705) is connected to the strip-shaped reflux groove (704), and the other end of the bridge outer tube (705) is connected to the seawater inlet pipe (5). The connecting port between the bridge outer tube (705) and the seawater inlet pipe (5) is located in a section between the front filter section (9) and the synchronous water pump (6).

4. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 3, characterized in that: A blocking ring sleeve (706) is arranged inside the switching pipe section (701); the blocking ring sleeve (706) is in the shape of a circular tube and is open at both ends; the blocking ring sleeve (706) blocks and closes the strip-shaped reflow groove (704) through axial movement and adjustment; a supporting wing plate (707) is fixedly arranged inside the blocking ring sleeve (706); and a central shaft (708) is fixedly arranged on the supporting wing plate (707).

5. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 4, characterized in that: A fixed sealing disk (709) is arranged inside the sealing disk pipe section (702), and the fixed sealing disk (709) is fixedly installed with the central shaft (708). The fixed sealing disk (709) can be driven to move by the axial movement of the central shaft (708). When the sealing ring sleeve (706) and the strip reflux groove (704) are completely offset so that the strip reflux groove (704) is fully opened, the fixed sealing disk (709) will be blocked at the end position of the switching pipe section (701), so that the connection between the switching pipe section (701) and the sealing disk pipe section (702) is disconnected.

6. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 5, characterized in that: A control tube body (710) is fixedly arranged on the right-angle connecting joint (703), and a sealing inner ring portion (711) is arranged between the control tube body (710) and the right-angle connecting joint (703). One end of the central axis (708) passes through the sealing inner ring portion (711) and extends into the control tube body (710). The central axis (708) and the sealing inner ring portion (711) are in sealing contact. A control piston (712) is arranged inside the control tube body (710), and the control piston (712) is in sealing contact with the inner wall surface of the control tube body (710). The control piston (712) and the central axis (708) are fixedly installed.

7. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 1, characterized in that: A pressure-equalizing air window (714) is provided through the surface of the control tube body (710), and the pressure-equalizing air window (714) is used to balance the side air pressure when the control piston (712) moves; when the temperature of the internal combustion engine module (2) increases, the variable pressure air cavity (717) can be heated, so that the expansion pressure of the gas inside the variable pressure air cavity (717) increases.

8. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 1, characterized in that: The sealing ring sleeve (706) and the rubber outer sleeve (723) are sealed and bonded.

9. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 1, characterized in that: The synchronous water pump (6) is provided with a water pump pulley (601), and the internal combustion engine module (2) drives the water pump pulley (601) to rotate through a belt drive, so that the synchronous water pump (6) works. The front filter section (9) is provided with a seawater filter layer (901), and impurities can be filtered out when the seawater flows through the seawater filter layer (901).

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