Seawater cooling pipeline mechanism of marine internal combustion engine generator

Abstract

The invention relates to the technical field of internal combustion engine cooling, in particular to a seawater cooling pipeline mechanism of a marine internal combustion engine generator, which comprises an equipment shell, and an internal combustion engine module, a generator module and a cooler which are arranged in the equipment shell, a synchronous water pump is fixedly arranged in the equipment shell, and a seawater inlet pipe and a seawater output pipe are arranged on the synchronous water pump; in the initial stage when the internal combustion engine module is started and drives the synchronous water pump to operate, cooling seawater flows back and circulates through the bridging outer pipe, the cooling seawater is prevented from entering the cooler to take away heat of the internal combustion engine module, the temperature of the internal combustion engine module can be rapidly increased, the optimal working temperature is reached, and low-temperature abrasion and fuel consumption are reduced.

Description

Technical Field

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

[0002] Internal combustion engine generator equipment is a device that generates electricity by driving the generator to rotate through an internal combustion engine. It is widely used in various emergency power supply places. Internal combustion engines and generators will generate a lot of heat when running. Since ships are sailing in the sea, the lowest cost heat dissipation method for marine internal combustion engine generators 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 by a pulley. When the internal combustion engine rotates to drive the generator to rotate, the water pump is driven to run and the seawater is extracted and driven. In actual use, there are certain limitations. In the initial stage of the internal combustion engine module just starting, the water pump is connected to the internal combustion engine through a pulley. When the internal combustion engine starts, the water pump will start with the internal combustion engine, taking away the heat of the internal combustion engine. In the early warm-up stage of the internal combustion engine just starting, the working efficiency is low, the fuel consumption is greater, and the low-temperature wear will be more serious. At this time, taking away the heat of the internal combustion engine has certain negative effects. Summary of the invention

[0003] The object 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 technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: 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 and generate electricity, a synchronous water pump is fixedly arranged in the equipment casing, a seawater inlet pipe and a seawater output pipe are arranged on the synchronous water pump, a secondary delivery pipe is arranged on the outside of the cooler, a control pipeline is arranged between the seawater output pipe and the secondary delivery pipe, when the synchronous water pump is running, seawater is extracted through the seawater inlet pipe, and seawater is output through the seawater output pipe, and the seawater enters the cooler through the control pipeline and the secondary delivery pipe in turn, and the internal combustion engine module and the generator module are cooled and heat exchanged by the cooler, a front-end filter section is arranged on the seawater inlet pipe, and the front-end 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, which are connected end to end in sequence, the seawater output pipe is connected to the switching pipe section, the secondary delivery pipe is connected to the right-angle connecting section, and the inner diameter of the sealing coil pipe section is larger than the inner diameter of the switching pipe section.

[0006] A strip reflux groove is provided through the switching pipe section, and the strip reflux groove is in a long strip shape, and the length direction of the strip reflux groove is parallel to the axial direction of the switching pipe section. A bridge outer pipe is provided on the outside of the switching pipe section, one end of the bridge outer pipe is connected to the strip reflux groove, and the other end of the bridge outer pipe is connected to the seawater inlet pipe, and the connecting port between the bridge outer pipe and the seawater inlet pipe is located in a section between the front filter section and the synchronous water pump.

[0007] A sealing ring is provided inside the switching pipe section. The sealing ring is in the shape of a circular tube with openings at both ends. The sealing ring blocks and closes the strip reflux groove through axial movement adjustment. A supporting wing is fixedly provided inside the sealing ring, and a central axis is fixedly provided on the supporting wing.

[0008] A fixed sealing disk is provided inside the sealing disk pipe section, and the fixed sealing disk is fixedly installed with the central axis. The fixed sealing disk can be driven to move through the axial movement of the central axis. When the sealing ring sleeve is completely offset from the strip reflux groove, so that the strip reflux groove is fully opened, the fixed sealing disk will seal at the end position of the switching pipe section, so that the connection between the switching pipe section and the sealing disk pipe section is disconnected.

[0009] A control tube body is fixedly arranged on the right-angle connecting joint, a sealing inner ring portion is arranged between the control tube body and the right-angle connecting joint, one end of the central axis body is inserted through the sealing inner ring portion and extends into the control tube body, the central axis body is in sealing contact with the sealing inner ring portion, a control piston is arranged inside the control tube body, the control piston is in sealing contact with the inner wall surface of the control tube body, and the control piston is fixedly installed with the central axis body.

[0010] A return spring is arranged on the side of the control piston away from the position of the central axis body, and a pressure-equalizing air window is opened through the surface of the control tube body, and the pressure-equalizing air window is used to balance the side air pressure when the control piston moves; a limiting top shaft is coaxially arranged inside the control tube body, and the limiting top shaft is used to support and limit the control piston; an air pressure control tube is arranged on the outside of the control tube body, and a variable pressure air cavity is arranged on the other end of the air pressure control tube, and the variable pressure air cavity is a hollow metal cavity structure, and the variable pressure air cavity is in thermal 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, so that the expansion pressure of the gas inside the variable pressure air cavity increases; the connecting port between the air pressure control tube and the control tube body is between the sealing inner ring part and the control piston. When the internal pressure of the variable pressure air cavity increases, the positive pressure gas enters between the sealing inner ring part and the control piston through the air pressure control tube, and drives the control piston to move axially.

[0011] A secondary center groove is provided on the side of the control piston facing the limiting top shaft, a secondary piston is arranged inside the secondary center groove, the secondary center groove and the secondary piston are in sealing contact, an accommodating ring groove is provided on the secondary piston, a connecting spring is connected between the accommodating ring groove and the inner wall surface of the secondary center groove, an inner cavity pipeline is provided inside the central axis body, and the inner cavity pipeline is communicated with the secondary center groove.

[0012] The outer sleeve of the sealing ring sleeve is provided with a rubber jacket, the sealing ring sleeve and the rubber jacket are sealed and bonded, the sealing ring sleeve is in contact with the inner wall surface of the switching pipe section through the rubber jacket, an air ring chamber and a connecting pipeline are opened in the rubber jacket, the air ring chamber is connected with the inner cavity pipeline through the connecting pipeline, and the inner cavity pipeline, the secondary center groove and the air ring chamber are all filled with incompressible liquid medium.

[0013] The synchronous water pump is provided with a water pump pulley, and the internal combustion engine module drives the water pump pulley to rotate through belt transmission, so that the synchronous water pump works. The front filter section is provided with a seawater filter layer, and impurities can be filtered out when the seawater flows through the seawater filter layer.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The seawater cooling pipeline mechanism of the present invention can start the internal combustion engine module and drive the synchronous water pump to operate in the initial stage through the control pipeline, and the cooling seawater refluxes through the bridge outer pipe 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 quickly heat up to reach the optimal working temperature, reducing low-temperature wear and fuel consumption; and through the reflux circulation of the above structure, the rotation resistance of the synchronous water pump can be reduced at the same time, so that the load of the internal combustion engine module at the moment of starting is lower and the start is smoother. During the reflux circulation process, the front filter section will not continue to filter seawater, extending the life of the front filter section. As the temperature of the internal combustion engine module rises, the control pipeline gradually increases the cooling seawater flow input into the cooler, and gradually reaches the maximum state to achieve automatic control.

[0015] The present invention cooperates with the structures such as the secondary center groove, the limiting top shaft and the air ring chamber, and can automatically increase the contact pressure between the rubber jacket and the inner wall surface of the switching pipe section when the sealing ring sleeve completely closes the strip reflux groove, so that the sealing performance of the strip reflux groove is further improved, avoiding leakage and reflux at the bridge outer pipe during the process of cooling the cooler with water at the maximum flow rate, thereby affecting the working efficiency of the synchronous water pump. When the sealing ring sleeve opens the strip reflux groove, the contact pressure between the rubber jacket and the inner wall surface of the switching pipe section can be automatically reduced to avoid excessive wear and consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of a cutaway housing of the device of the present invention.

[0018] Figure 3 It is a three-dimensional half-section schematic diagram of the seawater output pipe of the present invention.

[0019] Figure 4 for Figure 3 A magnified schematic diagram of area A in the middle.

[0020] Figure 5 for Figure 4 Enlarged schematic diagram of area C in the middle.

[0021] Figure 6 for Figure 3 Enlarged schematic diagram of area B in the middle.

[0022] Figure 7 for Figure 6 Enlarged schematic diagram of area D in the middle.

[0023] Figure 8 It is a three-dimensional half-section front view of the seawater output pipe of the present invention.

[0024] Fig. 9 It is a three-dimensional half-section schematic diagram of the seawater output pipe of the present invention at a horizontal angle.

[0025] Fig.10 for Fig. 9 Enlarged schematic diagram of area E in the middle.

[0026] 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

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figures 1 to 10 The present invention provides a technical solution: a seawater cooling pipeline mechanism for a marine internal combustion engine generator, such as Figure 1 As shown in the figure, it includes 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. 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 cooling seawater in the cooler 4. An isolation layer is arranged 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 to avoid seawater corrosion problems.

[0029] The internal combustion engine module 2 drives the generator module 3 to operate and generate electricity. A synchronous water pump 6 is fixedly installed in the equipment casing 1. A seawater inlet pipe 5 and a seawater output pipe 7 are arranged on the synchronous water pump 6. A secondary delivery pipe 8 is arranged for external communication with the cooler 4. A control pipeline is arranged between the seawater output pipe 7 and the secondary delivery pipe 8. When the synchronous water pump 6 is running, seawater is extracted through the seawater inlet pipe 5 and output through the seawater output pipe 7. The seawater enters the cooler 4 through the control pipeline and the secondary delivery pipe 8 in turn. The internal combustion engine module 2 and the generator module 3 are cooled and heat exchanged by the cooler 4. A front-end filter section 9 is arranged on the seawater inlet pipe 5. The front-end filter section 9 is used to filter the seawater flowing in the seawater inlet pipe 5.

[0030] 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 output 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 sealing coil pipe section 702 is larger than the inner diameter of the switching pipe section 701. A strip reflux groove 704 is provided through the switching pipe section 701. The strip reflux groove 704 is in a long strip shape, and the length direction of the strip reflux groove 704 is parallel to the axis direction of the switching pipe section 701. A bridge outer pipe 705 is provided outside the switching pipe section 701. One end of the bridge outer pipe 705 is connected to the strip reflux groove 704, and the other end of the bridge outer pipe 705 is connected to the seawater inlet pipe 5. The connecting port between the bridge outer pipe 705 and the seawater inlet pipe 5 is located in a section between the front filter section 9 and the synchronous water pump 6.

[0031] A plugging ring 706 is provided inside the switching pipe section 701. The plugging ring 706 is in the shape of a circular tube and is open at both ends. The plugging ring 706 blocks and closes the strip reflux groove 704 by axial movement and adjustment. A supporting wing plate 707 is fixedly provided inside the plugging ring 706, and a central shaft 708 is fixedly provided on the supporting wing plate 707. A fixed sealing disk 709 is provided inside the sealing disk pipe section 702. 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 plugging ring 706 is completely staggered with the strip reflux groove 704, 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 switching pipe section 701 and the sealing disk pipe section 702 are disconnected.

[0032] 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 body 708 passes through the sealing inner ring portion 711 and extends into the control tube body 710. The central axis body 708 is in sealing contact with the sealing inner ring portion 711. A control piston 712 is arranged inside the control tube body 710. The control piston 712 is in sealing contact with the inner wall surface of the control tube body 710, and the control piston 712 is fixedly installed with the central axis body 708.

[0033] A return spring 713 is provided on the side of the control piston 712 away from the central axis 708. A pressure-equalizing air window 714 is provided on the surface of the control tube body 710. The pressure-equalizing air window 714 is used to balance the side air pressure when the control piston 712 moves. A limiting top shaft 715 is coaxially provided inside the control tube body 710. The limiting top shaft 715 is used to support and limit the control piston 712. An air pressure control tube 716 is provided on the outside of the control tube body 710. The other end of the air pressure control tube 716 is provided with a variable pressure air cavity 717. The variable pressure air cavity 717 It is a hollow metal cavity structure. The transformer 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 transformer air cavity 717 can be heated, so that the expansion pressure of the gas inside the transformer air cavity 717 increases; the connecting 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 transformer 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.

[0034] A secondary center groove 718 is provided on the side of the control piston 712 facing the limiting top shaft 715, and a secondary piston 719 is arranged inside the secondary center groove 718. The secondary center groove 718 and the secondary piston 719 are in sealing contact with each other. An accommodating ring groove 720 is provided on the secondary piston 719, and a connecting spring 721 is connected between the accommodating 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 connected to the secondary center groove 718.

[0035] The outer sleeve of the sealing ring sleeve 706 is provided with a rubber jacket 723. The sealing ring sleeve 706 can be made of hard materials such as metal, and the rubber jacket 723 is made of soft rubber material. The sealing ring sleeve 706 and the rubber jacket 723 are sealed and bonded to avoid air leakage. The sealing ring sleeve 706 contacts the inner wall surface of the switching pipe section 701 through the rubber jacket 723. The rubber jacket 723 is provided with an air ring chamber 724 and a connecting pipeline 725. The air ring chamber 724 is connected with the inner cavity pipeline 722 through the connecting pipeline 725. The inner cavity pipeline 722, the secondary center groove 718 and the air ring chamber 724 are all filled with incompressible liquid medium, such as water or oil, which can transmit the extrusion of the secondary piston 719 and reduce the loss of the compressed medium.

[0036] 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 belt transmission, so that the synchronous water pump 6 works. A seawater filter layer 901 is provided in the front filter section 9, and impurities can be filtered out when seawater flows through the seawater filter layer 901.

[0037] When the seawater cooling pipeline mechanism of the present invention is in use, the seawater inlet pipe 5 is connected to the external seawater. After the internal combustion engine module 2 is shut down for a long time to cool down, since the pressure-changing air cavity 717 is at the ambient temperature, the internal gas does not expand significantly. Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown in the figure, the control piston 712 is located at one end close to the sealing inner ring portion 711 under the elastic pressure of the return spring 713; the fixed sealing disk 709 is pressed on the end position of the switching pipe section 701, so that the switching pipe section 701 and the sealing disk pipe section 702 are shut off, and the sealing ring sleeve 706 is completely offset from the strip reflux groove 704, so that the strip reflux groove 704 is fully opened.

[0038] 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.

[0039] 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 shaft 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.

[0040] 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.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 running, 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).

2. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 1, characterized in that: The control pipeline comprises 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 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 6, characterized in that: A return spring (713) is arranged on the side of the control piston (712) away from the central axis (708); a pressure-equalizing air window (714) is provided on the surface of the control tube body (710); the pressure-equalizing air window (714) is used to balance the side air pressure when the control piston (712) moves; a limiting top shaft (715) is coaxially arranged inside the control tube body (710); the limiting 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 outside of the control tube body (710); a variable pressure air cavity (717) is arranged on the other end of the variable pressure air cavity (717); The 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) 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. 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.

8. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 7, characterized in that: The control piston (712) is provided with a secondary center groove (718) on the side facing the limiting top shaft (715), and a secondary piston (719) is arranged inside the secondary center groove (718). The secondary center groove (718) and the secondary piston (719) are in sealing contact with each other. The secondary piston (719) is provided with a containing ring groove (720), and a connecting spring (721) is connected between the containing 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 connected to the secondary center groove (718).

9. The seawater cooling pipeline mechanism for a marine internal combustion engine generator according to claim 8, characterized in that: The sealing ring sleeve (706) is provided with a rubber jacket (723) on the outside, and the sealing ring sleeve (706) and the rubber jacket (723) are sealed and bonded. The sealing ring sleeve (706) is in contact with the inner wall surface of the switching pipe section (701) through the rubber jacket (723). The rubber jacket (723) is provided with an air ring chamber (724) and a connecting pipeline (725). The air ring chamber (724) is connected to the inner cavity pipeline (722) through the connecting pipeline (725). The inner cavity pipeline (722), the secondary central groove (718) and the air ring chamber (724) are all filled with an incompressible liquid medium.

10. 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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