High-pressure reciprocating pump diesel engine cooling system

Abstract

This invention discloses a cooling device for a high-pressure reciprocating pump diesel engine, comprising a diesel engine, a hydraulic system, and a high-pressure pump. The diesel engine is connected to a diesel engine water cooler and a diesel engine compressor cooler. The hydraulic system is connected to a hydraulic system cooler. The high-pressure pump is connected to a high-pressure pump lubricating oil cooler. A water tank connects the diesel engine water cooler, diesel engine compressor cooler, hydraulic system cooler, and high-pressure pump lubricating oil cooler. All three are installed within the water tank. The output end of the water tank is connected to the high-pressure pump. The output end of the high-pressure pump is connected to a heat dissipation mechanism. The output end of the heat dissipation mechanism is connected to a heat exchange mechanism, and the output end of the heat exchange mechanism is connected to the water tank. This invention employs water cooling, centrally installing the radiators within a single water tank. This water tank provides water for the high-pressure pump and also serves as cooling water for the radiators.

Description

Technical Field

[0001] This invention belongs to the field of diesel engine cooling technology, specifically relating to a high-pressure reciprocating pump diesel engine cooling device. Background Technology

[0002] High-pressure reciprocating pump diesel engine units are internal combustion engines that use diesel fuel. They have high torque and good economic performance. Currently, the design of high-pressure reciprocating pump diesel engine units needs to consider the heat dissipation problem of the equipment. The parts that need heat dissipation include the compressed air heat dissipation of the diesel engine, the engine block cooling water heat dissipation, the hydraulic system heat dissipation, and the high-pressure reciprocating pump lubrication system heat dissipation. However, the radiators of all units are designed separately and independently, and the heat dissipation methods are different. The diesel engine uses a single air-cooled radiator driven by the diesel engine fan; the hydraulic system uses a single radiator, either an electric fan or a separate water-cooled radiator; and the high-pressure reciprocating pump uses a single radiator, either an electric fan or a separate water-cooled radiator. This results in a large space occupation. In addition, air-cooling requires consideration of airflow direction, the fan rotation noise is relatively large, and the heat dissipation is unstable. Therefore, there is an urgent need for a cooling device for high-pressure reciprocating pump diesel engine units to solve the above problems. Summary of the Invention

[0003] In view of the problems mentioned above in the background art, the object of the present invention is to provide a cooling device for a high-pressure reciprocating pump diesel engine.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0005] A high-pressure reciprocating pump diesel engine cooling device includes a diesel engine, a hydraulic system, and a high-pressure pump. The diesel engine is connected to a diesel engine water cooler and a diesel engine compressor cooler. The hydraulic system is connected to a hydraulic system cooler. The high-pressure pump is connected to a high-pressure pump lubricating oil cooler. The diesel engine water cooler, diesel engine compressor cooler, hydraulic system cooler, and high-pressure pump lubricating oil cooler are all connected to a water tank. The diesel engine water cooler, diesel engine compressor cooler, hydraulic system cooler, and high-pressure pump lubricating oil cooler are all installed inside the water tank. The output end of the water tank is connected to the high-pressure pump. The output end of the high-pressure pump is connected to a heat dissipation mechanism. The output end of the heat dissipation mechanism is connected to a heat exchange mechanism. The output end of the heat exchange mechanism is connected to the water tank.

[0006] Further specifying, the heat dissipation mechanism includes a heat dissipation shell, a return pipe installed on the top of the heat dissipation shell, a flow divider plate connected to the output end of the return pipe, the flow divider plate being fixedly installed on the inner top of the heat dissipation shell, a plurality of evenly arranged heat-conducting pipes connected to the output end of the flow divider plate, heat-conducting fins installed on the outer wall of the heat-conducting pipes, a confluence plate connected to the bottom of the heat-conducting pipes, and the output end of the confluence plate being connected to the heat exchange mechanism. This structural design facilitates flow-diverting heat conduction and cooling.

[0007] Furthermore, thermoelectric coolers are mounted on both sides of the heat sink, with the heat-absorbing end of each cooler connected to a heat-conducting plate, and the heat-dissipating end of each cooler connected to a plurality of heat-dissipating fins. These heat-dissipating fins are evenly arranged on the cooler and positioned on the outer side of the heat sink. This structural design facilitates heat conduction and dissipation.

[0008] Furthermore, the junctions between the thermoelectric cooler and the heatsink and heat dissipation fins are coated with thermally conductive silicone grease, and the thermoelectric cooler is connected to the heatsink and heat dissipation fins via the silicone grease. This structural design improves heat conduction.

[0009] Furthermore, fan mounts are installed on both sides of the top of the heat sink, and the fan mounts are positioned on top of the heat sink fins. Several cooling fans are evenly installed within the fan mounts. This structural design improves heat dissipation efficiency.

[0010] Furthermore, the heat-conducting sheet is arranged in a spiral structure. This structural design increases the thermal contact area, enabling heat to be dissipated.

[0011] Further specifying, the heat exchange mechanism includes a heat exchange box, with a liquid storage tank located on one side of the top of the heat exchange box. Two sets of water pumps are installed inside the liquid storage tank, and the output ends of the two sets of water pumps are connected to heat exchange tubes. The heat exchange tubes are installed inside the heat exchange box, and their output ends are connected to the liquid storage tank. A water outlet is located on one side of the heat exchange box, and an output pump is located at the water outlet on the inner side of the heat exchange box. The water outlet is connected to the water tank. This structural design facilitates heat exchange and cooling processes.

[0012] Further specifying, the liquid storage tank includes a storage tank body, a sealing locking plate installed on the top of the storage tank body, a sealing partition installed inside the storage tank body, a heat-conducting cavity formed between the storage tank body and the sealing partition, a liquid storage cavity formed within the sealing partition, a sealing strip installed on the upper side of the heat-conducting cavity of the storage tank body, the sealing strip being installed at the bottom of the sealing locking plate, a plurality of heat-conducting plates installed on one side of the heat-conducting cavity of the sealing partition, the plurality of heat-conducting plates being evenly arranged on the sealing partition, the spacing between two adjacent heat-conducting plates being equal, heat dissipation fins being connected to the heat-conducting plates, the other side of the heat dissipation fins penetrating the storage tank body and extending to its outer side, the heat-conducting cavity being filled with a heat-conducting medium, and the liquid storage cavity being filled with a cooling medium. This structural design facilitates the cooling and heat dissipation of the cooling medium.

[0013] Furthermore, an air-cooling mechanism is installed on one side of the top of the heat exchange box, the liquid storage tank is mounted on the air-cooling mechanism, and the inlet and outlet pipes of the heat exchange tubes are both connected through the air-cooling mechanism. This structural design improves the cooling effect.

[0014] Furthermore, the heat exchange tubes are arranged in a serpentine, meandering pattern within the heat exchange box. A replenishment pipe is located on one side of the top of the heat exchange box, and a one-way valve is installed inside the replenishment pipe. A water level observation window is located below the replenishment pipe in the heat exchange box. This structural design increases the heat exchange contact area and allows for timely replenishment.

[0015] The beneficial effects of this invention are as follows: By adopting a water cooling method, the radiator is centrally installed in a water tank. This water tank provides water for the high-pressure pump and also serves as cooling water for the radiator. By setting up a heat dissipation mechanism, the hot water after heat exchange can be quickly dissipated. After being cooled by the heat exchange mechanism, it is then transported back to the water tank for use, achieving energy saving while improving the cooling efficiency of the water. This invention saves space, reduces noise, does not require consideration of airflow direction, and fully meets the noise requirements for construction operations in urban areas. Attached Figure Description

[0016] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0017] Figure 1 This is a schematic diagram of the structure of the high-pressure reciprocating pump diesel engine cooling device according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the heat dissipation mechanism and heat exchange mechanism of the high-pressure reciprocating pump diesel engine cooling device according to an embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional view of the heat dissipation mechanism and heat exchange mechanism of the high-pressure reciprocating pump diesel engine cooling device according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the vertical cross-sectional structure of the heat dissipation mechanism of the high-pressure reciprocating pump diesel engine cooling device according to an embodiment of the present invention;

[0021] The symbols for the main components are explained below:

[0022] 1. Diesel engine; 2. Hydraulic system; 3. High-pressure pump; 4. Diesel engine water cooler; 5. Diesel engine compressor cooler; 6. Hydraulic system cooler; 7. High-pressure pump lubricating oil cooler; 8. Water tank; 9. Heat dissipation mechanism; 10. Heat exchange mechanism; 11. Radiator shell; 12. Return pipe; 13. Diverter plate; 14. Heat conduction pipe; 15. Heat conduction fin; 16. Converging plate; 17. Semiconductor cooling chip; 18. Heat dissipation fins; 19. Fan mount; 20. Radiator fan; 21. Heat exchange box; 22. Liquid storage tank; 23. Water pump; 24. Heat exchange pipe; 25. Water outlet; 26. Liquid storage tank body; 27. Sealing lock plate; 28. Sealing partition; 29. ​​Heat conduction cavity; 30. Liquid storage cavity; 31. Sealing strip; 32. Heat conduction plate; 33. Heat dissipation fin; 34. Air cooling mechanism; 35. Liquid replenishment pipe; 36. One-way valve; 37. Output pump. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Example 1, as Figure 1 and Figure 2 As shown, the high-pressure reciprocating pump diesel engine cooling device includes a diesel engine 1 connected to a diesel engine water cooler 4 and a diesel engine compressor cooler 5, a hydraulic system 2 connected to a hydraulic system cooler 6, and a high-pressure pump 3 connected to a high-pressure pump lubricating oil cooler 7. A water tank 8 connects the diesel engine water cooler 4, diesel engine compressor cooler 5, hydraulic system cooler 6, and high-pressure pump lubricating oil cooler 7. All three are installed inside the water tank 8. The output end of the water tank 8 is connected to the high-pressure pump 3. The output end of the high-pressure pump 3 is connected to a heat dissipation mechanism 9, and the output end of the heat dissipation mechanism 9 is connected to a heat exchange mechanism 10. The output end of the heat exchange mechanism 10 is also connected to the water tank 8.

[0025] In this embodiment, the working medium in the water tank 8 is "water". During use, the heat from the diesel engine 1, hydraulic system 2, and high-pressure pump 3 is transferred to the water in the water tank 8 by the diesel engine water cooler 4, diesel engine compressor cooler 5, hydraulic system cooler 6, and high-pressure pump lubricating oil cooler 7, so that the diesel engine 1, hydraulic system 2, and high-pressure pump 3 can be cooled. The hot water in the water tank 8 is output to the high-pressure pump 3. After the high-pressure pump 3 pressurizes the water, it is output to the heat dissipation mechanism 9. The heat dissipation mechanism 9 dissipates the heat from the hot water. The water after being cooled by the heat dissipation mechanism 9 enters the heat exchange mechanism 10, where the heat exchange mechanism 10 cools the water. The cooled water is then transported back to the water tank 8 to simultaneously cool the diesel engine 1, hydraulic system 2, and high-pressure pump 3.

[0026] Example 2, as Figure 2 , Figure 3 and Figure 4 As shown, this embodiment adds the following structure based on embodiment 1: the heat dissipation mechanism 9 includes a heat dissipation shell 11, a return pipe 12 is installed on the top of the heat dissipation shell 11, a flow divider 13 is connected to the output end of the return pipe 12, the flow divider 13 is fixedly installed on the inner top of the heat dissipation shell 11, a plurality of uniformly arranged heat-conducting pipes 14 are connected to the output end of the flow divider 13, heat-conducting plates 15 are installed on the outer wall of the heat-conducting pipes 14, a confluence plate 16 is connected to the bottom of the heat-conducting pipes 14, and the output end of the confluence plate 16 is connected to the heat exchange mechanism 10.

[0027] In this embodiment, during use, the hot water in the water tank 8 is output to the high-pressure pump 3. After the high-pressure pump 3 pressurizes the water, it is output to the return pipe 12. The return pipe 12 then transports the water to the diversion plate 13, which diverts the water to facilitate subsequent heat dissipation. After being diverted by the diversion plate 13, the hot water flows into the heat-conducting pipes 14. The hot water flows within the heat-conducting pipes 14. Through the combined use of the heat-conducting plate 15 and the heat-conducting pipes 14, the heat of the hot water in the heat-conducting pipes 14 can be dissipated, thus cooling the hot water. After being heated, the hot water flows into the confluence plate 16. After being combined by the confluence plate 16, the hot water is transported to the heat exchange mechanism 10 for cooling.

[0028] Example 3, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 2: a semiconductor cooling chip 17 is installed on both sides of the heat dissipation shell 11, the heat absorption end of the semiconductor cooling chip 17 is connected to the heat conduction plate 15, and a plurality of heat dissipation fins 18 are connected to the heat release end of the semiconductor cooling chip 17. The plurality of heat dissipation fins 18 are evenly arranged on the semiconductor cooling chip 17 and are disposed on the outside of the heat dissipation shell 11.

[0029] In this embodiment, the heat-conducting sheet 15 and the heat-conducting pipe 14 are used together to conduct the heat of the hot water in the heat-conducting pipe 14. The heat is then transferred to the heat-absorbing end of the semiconductor cooling chip 17, and the semiconductor cooling chip 17 transfers the heat to the heat dissipation fins 18 at the heat dissipation end. The heat dissipation fins 18 are used for rapid heat dissipation, which reduces the high temperature inside the heat sink 11 and improves the heat conduction efficiency.

[0030] Example 4: Based on Example 3, this example adds the following structure: the connection between the semiconductor cooling chip 17 and the heat-conducting sheet 15 and the heat dissipation fins 18 is coated with thermally conductive silicone grease, and the semiconductor cooling chip 17 is connected to the heat-conducting sheet 15 and the heat dissipation fins 18 through the silicone grease.

[0031] In this embodiment, during use, the semiconductor cooling chip 17 is connected to the heat-conducting chip 15 and the heat dissipation fins 18 through a thermally conductive silicone grease, which makes the heat transfer faster and the heat conduction effect better.

[0032] Example 5, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 2: fan mounts 19 are installed on both sides of the top of the heat sink 11, the fan mounts 19 are located on the top of the heat sink fins 18, and a plurality of cooling fans 20 are evenly installed inside the fan mounts 19.

[0033] In this embodiment, when the semiconductor cooling chip 17 transfers internal heat to the heat dissipation fins 18 for heat dissipation, the cooling fan 20 is activated to blow air onto the heat dissipation fins 18, thereby accelerating the heat dissipation efficiency of the heat dissipation fins 18 and improving the performance.

[0034] Example 6, as Figure 3 and Figure 4 As shown, this embodiment adds the following structure to the embodiment 2: the heat-conducting sheet 15 is arranged in a spiral shape.

[0035] In this embodiment, when the heat-conducting sheet 15 conducts heat, the spiral structure makes the contact area between the heat-conducting sheet 15 and the heat-conducting pipe 14 large and long, which can better conduct heat to the hot water in the heat-conducting pipe 14.

[0036] Example 7, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the heat exchange mechanism 10 includes a heat exchange box 21, a liquid storage tank 22 is provided on one side of the top of the heat exchange box 21, two sets of water pumps 23 are installed in the liquid storage tank 22, the output ends of the two sets of water pumps 23 are connected to heat exchange tubes 24, the heat exchange tubes 24 are installed in the heat exchange box 21, the output ends of the heat exchange tubes 24 are connected to the liquid storage tank 22, a water outlet 25 is provided on one side of the heat exchange box 21, an output pump 37 is provided at the water outlet 25 on the inner side of the heat exchange box 21, and the water outlet 25 is connected to the water tank 8.

[0037] In this embodiment, during use, the water that has been cooled by the heat dissipation mechanism 9 enters the heat exchange mechanism 10 and flows into the heat exchange box 21. At this time, the water pump 23 is started, which draws the cooling medium in the storage tank 22 into the heat exchange tube 24, thereby cooling the heat exchange tube 24. The cooled heat exchange tube 24 then cools the water in the heat exchange box 21. The cooled water is then output from the outlet 25 to the water tank 8 to continue the cooling operation.

[0038] Example 8, as Figure 3As shown, this embodiment adds the following structure based on embodiment 7: the liquid storage tank 22 includes a liquid storage tank body 26, a sealing lock plate 27 is installed on the top of the liquid storage tank body 26, a sealing partition 28 is installed inside the liquid storage tank body 26, a heat conduction cavity 29 is formed between the liquid storage tank body 26 and the sealing partition 28, a liquid storage cavity 30 is formed inside the sealing partition 28, a sealing strip 31 is installed on the upper side of the heat conduction cavity 29 of the liquid storage tank body 26, the sealing strip 31 is installed on the bottom of the sealing lock plate 27, a plurality of heat conduction plates 32 are installed on one side of the heat conduction cavity 29 of the sealing partition 28, the plurality of heat conduction plates 32 are evenly arranged on the sealing partition 28, the spacing between two adjacent heat conduction plates 32 is equal, the heat conduction plates 32 are connected to heat dissipation fins 33, the other side of the heat dissipation fins 33 penetrates the liquid storage tank body 26 and extends to its outer side, the heat conduction cavity 29 is filled with a heat conduction medium, and the liquid storage cavity 30 is filled with a cooling medium.

[0039] In this embodiment, during use, the heat of the cooling medium inside the sealed partition 28 is conducted out through the heat conduction plate 32 and transferred to the heat sink 33. Finally, the heat is dissipated through the heat sink 33, thereby achieving the cooling treatment of the cooling medium.

[0040] Example 9, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure to the embodiment 7: a cooling mechanism 34 is installed on one side of the top of the heat exchange box 21, the liquid storage tank 22 is installed on the cooling mechanism 34, and the inlet and outlet pipes of the heat exchange tube 24 are both through the cooling mechanism 34.

[0041] In this embodiment, during use, the air-cooling mechanism 34 improves the cooling effect on the cooling medium in the heat exchange tube 24, which facilitates subsequent heat exchange operations.

[0042] Example 10, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 7: the heat exchange tube 24 is arranged in a serpentine spiral inside the heat exchange box 21, a liquid replenishment pipe 35 is provided on one side of the top of the heat exchange box 21, a one-way valve 36 is installed in the liquid replenishment pipe 35, and a water level observation window is provided on the lower side of the liquid replenishment pipe 35 in the heat exchange box 21.

[0043] In this embodiment, during use, the heat exchange tube 24, which is arranged in a serpentine spiral, comes into contact with water inside the heat exchange box 21, resulting in a large contact area and wide range, which improves the heat exchange effect and enables faster cooling of the water. The internal water level can be observed through the water level observation window. When the water level is insufficient, water is added through the liquid replenishment tube 35, thereby improving the usage effect.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. Cooling device for high-pressure reciprocating pump diesel engine groups, comprising a diesel engine (1), a hydraulic system (2) and a high-pressure pump (3), characterized in that: The diesel engine (1) is connected to a diesel engine water cooler (4) and a diesel engine compressor cooler (5). The hydraulic system (2) is connected to a hydraulic system cooler (6). The high-pressure pump (3) is connected to a high-pressure pump lubricating oil cooler (7). The diesel engine water cooler (4), diesel engine compressor cooler (5), hydraulic system cooler (6) and high-pressure pump lubricating oil cooler (7) are connected to a water tank (8). The diesel engine water cooler (4), diesel engine compressor cooler (5), hydraulic system cooler (6) and high-pressure pump lubricating oil cooler (7) are all installed in the water tank (8). The output end of the water tank (8) is connected to the high-pressure pump (3). The output end of the high-pressure pump (3) is connected to a heat dissipation mechanism (9). The output end of the heat dissipation mechanism (9) is connected to a heat exchange mechanism (10). The output end of the heat exchange mechanism (10) is connected to the water tank (8). The heat dissipation mechanism (9) includes a heat dissipation shell (11), a return pipe (12) is installed on the top of the heat dissipation shell (11), a flow divider (13) is connected to the output end of the return pipe (12), the flow divider (13) is fixedly installed on the inner top of the heat dissipation shell (11), a plurality of uniformly arranged heat conduction pipes (14) are connected to the output end of the flow divider (13), heat conduction plates (15) are installed on the outer wall of the heat conduction pipes (14), a confluence plate (16) is connected to the bottom of the heat conduction pipes (14), and the output end of the confluence plate (16) is connected to the heat exchange mechanism (10). The heat exchange mechanism (10) includes a heat exchange box (21). A liquid storage tank (22) is provided on one side of the top of the heat exchange box (21). Two sets of water pumps (23) are installed in the liquid storage tank (22). The output ends of the two sets of water pumps (23) are connected to heat exchange tubes (24). The heat exchange tubes (24) are installed in the heat exchange box (21). The output ends of the heat exchange tubes (24) are connected to the liquid storage tank (22). A water outlet (25) is provided on one side of the heat exchange box (21). An output pump (37) is provided at the water outlet (25) on the inner side of the heat exchange box (21). The water outlet (25) is connected to the water tank (8).

2. The high pressure reciprocating pump diesel engine cooling arrangement of claim 1, wherein: Semiconductor cooling chips (17) are installed on both sides of the heat dissipation shell (11). The heat absorption end of the semiconductor cooling chip (17) is connected to the heat conduction plate (15). The heat dissipation end of the semiconductor cooling chip (17) is connected to a number of heat dissipation fins (18). The number of heat dissipation fins (18) are evenly arranged on the semiconductor cooling chip (17) and set on the outside of the heat dissipation shell (11).

3. The high pressure reciprocating pump diesel engine cooling arrangement of claim 2, wherein: The semiconductor cooling chip (17) is coated with thermally conductive grease at the connection points with the heat-conducting sheet (15) and the heat dissipation fins (18), and the semiconductor cooling chip (17) is connected to the heat-conducting sheet (15) and the heat dissipation fins (18) through the grease.

4. The high pressure reciprocating pump diesel engine cooling arrangement of claim 3, wherein: Fan mounts (19) are installed on both sides of the top of the heat sink (11). The fan mounts (19) are located on the top of the heat sink fins (18). Several cooling fans (20) are evenly installed inside the fan mounts (19).

5. The high pressure reciprocating pump diesel engine cooling arrangement of claim 4, wherein: The heat-conducting sheet (15) is arranged in a spiral structure.

6. The high pressure reciprocating pump diesel engine cooling arrangement of claim 5, wherein: The liquid storage tank (22) includes a liquid storage tank body (26), a sealing lock plate (27) is installed on the top of the liquid storage tank body (26), a sealing partition plate (28) is installed inside the liquid storage tank body (26), a heat conduction cavity (29) is formed between the liquid storage tank body (26) and the sealing partition plate (28), a liquid storage cavity (30) is formed inside the sealing partition plate (28), and a sealing strip (31) is installed on the upper side of the heat conduction cavity (29) of the liquid storage tank body (26), and the sealing strip (31) is installed on the sealing lock plate (27). At the bottom, the sealing partition (28) has several heat-conducting plates (32) installed on one side of the heat-conducting cavity (29). The heat-conducting plates (32) are evenly arranged on the sealing partition (28). The distance between two adjacent heat-conducting plates (32) is equal. The heat-conducting plates (32) are connected to heat sinks (33). The other side of the heat sinks (33) penetrates through the liquid storage tank (26) and extends to its outer side. The heat-conducting cavity (29) is filled with a heat-conducting medium, and the liquid storage cavity (30) is filled with a cooling medium.

7. The high pressure reciprocating pump diesel engine cooling arrangement of claim 6, wherein: A cooling mechanism (34) is installed on one side of the top of the heat exchange box (21), the liquid storage tank (22) is installed on the cooling mechanism (34), and the inlet and outlet pipes of the heat exchange tube (24) are both connected through the cooling mechanism (34).

8. The high pressure reciprocating pump diesel engine cooling arrangement of claim 7, wherein: The heat exchange tube (24) is arranged in a serpentine manner inside the heat exchange box (21). A liquid replenishment tube (35) is provided on one side of the top of the heat exchange box (21). A one-way valve (36) is installed in the liquid replenishment tube (35). A water level observation window is provided on the lower side of the liquid replenishment tube (35) of the heat exchange box (21).

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