Liquid powered diesel fire pump apparatus

Abstract

The application discloses a kind of liquid-driven diesel fire pump devices, it is related to the field of fire-fighting equipment, it includes deck, pumping mechanism, diesel engine, booster pump and hydraulic pump oil tank;Hydraulic pump oil tank, diesel engine and booster pump are installed on deck, and the input shaft of booster pump is connected with the output shaft of diesel engine;Diesel engine is installed with hydraulic pump on the side away from booster pump, and hydraulic pump is driven by diesel engine, and the input end of hydraulic pump is communicated with hydraulic pump oil tank by pipeline;Pumping mechanism includes water suction pipe and lifting pump, and the top end of water suction pipe is communicated with the water inlet of booster pump, and the bottom end of water suction pipe is fixedly installed with filter cartridge.Lifting pump is installed in water suction pipe, and hydraulic motor for driving lifting pump is fixedly installed in water suction pipe, and the pumping mechanism further includes oil supply assembly for supplying oil to hydraulic motor.The application has the effects of simplifying structure, facilitating installation and maintenance, improving operation stability and system reliability.

Description

Technical Field

[0001] This application relates to the technical field of fire-fighting equipment, and in particular to a liquid-driven diesel fire pump device. Background Technology

[0002] Fire pump systems are critical safety equipment for offshore oil platforms, drilling ships, and other marine facilities. Because these facilities are far from land and store large quantities of flammable materials, their fire suppression systems must possess extremely high reliability and self-sufficiency. Therefore, independent fire pumps powered by diesel engines and independent of external power grids have become a core component in such environments.

[0003] Currently, these types of diesel fire pumps generally adopt a "diesel engine + vertical long-shaft pump" structure. The diesel engine is usually located on the platform deck, while the pump body is connected to a rigid drive shaft several meters to tens of meters long, which runs through the multi-layered structure of the platform and extends to the bottom of the platform or the pump room near sea level to draw seawater as a fire-fighting water source. Due to the multi-layered structure and compact space of offshore platforms, installing an ultra-long drive shaft is an extremely precise and complicated project, requiring high construction accuracy, a long installation period, and significant inconvenience for subsequent maintenance. During rotation, the drive shaft is prone to vibration, sway, and even resonance, which not only affects the stability of the system operation but also poses risks such as shaft wear and breakage, reducing the overall reliability of the system. Utility Model Content

[0004] In view of the above-mentioned prior art, in order to solve the problems of inconvenient installation and maintenance, poor operational stability and insufficient system reliability caused by long drive shafts, this application provides a liquid-driven diesel fire pump device.

[0005] This application provides a hydraulically driven diesel fire pump device, which adopts the following technical solution: A hydraulically driven diesel fire pump device includes a deck, a diesel engine fixed on the deck, a booster pump, and a hydraulic pump tank. A hydraulic pump is installed on the diesel engine, and the input end of the hydraulic pump is connected to the hydraulic pump tank via a pipe. It also includes a pumping mechanism, which comprises a pumping pipe, a lift pump, and an oil supply assembly. The top end of the pumping pipe is connected to the inlet of the booster pump, and the bottom end of the pumping pipe is submerged in water. The lift pump is fixedly installed inside the pumping pipe near its bottom end, and a hydraulic motor for driving the lift pump is installed inside the pumping pipe. The oil supply assembly includes a high-pressure oil pipe and a low-pressure oil pipe. The high-pressure oil pipe connects the output end of the hydraulic pump to the inlet of the hydraulic motor, and the low-pressure oil pipe connects the return port of the hydraulic motor to the hydraulic pump tank.

[0006] By adopting the above technical solution, hydraulic transmission replaces the traditional long-shaft mechanical transmission. A diesel engine drives a hydraulic pump to generate high-pressure oil, which is then transported through pipelines to a hydraulic motor located at the bottom of the pumping pipe, driving the lift pump. This design completely eliminates the risks of vibration, sway, resonance, wear, and breakage associated with ultra-long drive shafts, simplifies installation and maintenance processes, and significantly improves the system's operational reliability and stability in confined spaces such as offshore platforms.

[0007] Preferably, the pumping pipe is provided with a high-pressure pipe and a low-pressure pipe, with the high-pressure pipe located inside the low-pressure pipe and arranged concentrically; a gap is left between the outer wall of the low-pressure pipe and the inner wall of the pumping pipe, and a gap is left between the outer wall of the high-pressure pipe and the inner wall of the low-pressure pipe; the top ends of the high-pressure pipe and the low-pressure pipe are fixedly connected to the inner wall of the pumping pipe; the bottom end of the low-pressure pipe is connected to the oil return port of the hydraulic motor; and the bottom end of the high-pressure pipe passes through the low-pressure pipe and is connected to the oil inlet of the hydraulic motor.

[0008] By adopting the above technical solution, the high-pressure pipe and low-pressure pipe are integrated inside the pumping pipe and arranged concentrically, resulting in a compact structure that effectively utilizes pipe space. The gaps between the high-pressure and low-pressure pipes, as well as between the low-pressure pipe and the pumping pipe, serve as return paths for hydraulic oil and also form a natural insulation layer, reducing heat exchange between the hydraulic oil and the external environment (especially low-temperature seawater) and helping to maintain stable oil temperature. Simultaneously, this integrated design simplifies the external piping layout and enhances the overall structural rigidity.

[0009] Preferably, the booster pump is fixedly installed at the bottom end of the pumping pipe, the top end of the pumping pipe is connected to the booster pump, the booster pump is equipped with a hydraulic motor for driving its operation, and the inlet of the booster pump is connected to a water supply pipe.

[0010] By adopting the above technical solution, another implementation method is provided, which integrates the hydraulic motor and the booster pump (such as a split-case pump) into a module and directly installs it at the bottom of the pumping pipe. This external drive form further simplifies the internal structure of the pumping pipe, making the installation and maintenance of the booster pump and hydraulic motor more convenient, without requiring complex operations inside the pumping pipe.

[0011] Preferably, the high-pressure oil pipe and the low-pressure oil pipe are located on both sides of the outer wall of the water pump. One end of the high-pressure oil pipe is connected to the output end of the hydraulic pump, and the other end of the high-pressure oil pipe is connected to the oil inlet of the hydraulic motor. One end of the low-pressure oil pipe is connected to the oil tank of the hydraulic pump, and the other end of the low-pressure oil pipe is connected to the oil return port of the hydraulic motor.

[0012] By adopting the above technical solution, the high-pressure oil pipe and the low-pressure oil pipe are arranged outside the water pumping pipe, which facilitates the installation, inspection and maintenance of the pipeline. The symmetrical or separate arrangement on both sides can reduce mutual interference between pipelines, and when an external oil pipe scheme is adopted (such as the corresponding external motor scheme), it avoids drilling holes in the water pumping pipe to connect the internal oil pipe, thus reducing manufacturing complexity.

[0013] Preferably, a protective shell is provided inside the water pump pipe, the protective shell is located above the lift pump, a fixed seat is provided inside the protective shell, and the hydraulic motor is located inside the protective shell and fixedly installed on the fixed seat.

[0014] By adopting the above technical solution, the protective shell provides the hydraulic motor with a sealed, robust installation environment and protective space, effectively isolating it from water flow, impurities, and potential external impacts, ensuring stable and reliable long-term operation of the hydraulic motor in harsh underwater environments. The mounting bracket ensures the motor's stability during installation and reduces vibration during operation.

[0015] Preferably, the pumping pipe is further provided with a protective pipe, which is sleeved around the periphery of the low-pressure pipe. A gap is left between the outer wall of the low-pressure pipe and the inner wall of the protective pipe. The bottom end of the protective pipe is connected to the protective shell, and the top end of the protective pipe is connected to the inner wall of the pumping pipe.

[0016] By adopting the above technical solution, the protective pipe completely isolates the internal oil pipe system (high-pressure pipe and low-pressure pipe) from the external water delivery channel; thus forming a regular, smooth, and continuous annular water passage between the inner wall of the pumping pipe and the outer wall of the protective pipe, significantly reducing water flow resistance and turbulence, ensuring that the water is delivered smoothly and efficiently upward, thereby improving the overall efficiency and head of the water pump.

[0017] Preferably, a filter cylinder is provided at the end of the water pump that is away from the booster pump.

[0018] By adopting the above technical solution, the filter cartridge can effectively intercept large particulate impurities, aquatic organisms and other suspended solids in the water source, preventing them from entering the booster pump and subsequent pipeline system, avoiding blockage and wear of the pump body, impeller and valves, and ensuring the long-term stable operation of the fire pump system. It is especially suitable for source water containing impurities such as seawater.

[0019] Preferably, an exhaust pipe is connected to the water pumping pipe, and a vacuum breaker valve is installed on the exhaust pipe.

[0020] By adopting the above technical solution, the exhaust pipe, in conjunction with the vacuum breaker valve, can expel air from the pipeline before the pump starts, ensuring that the pipeline is filled with water and preventing cavitation. When the pump stops working, the vacuum breaker valve can automatically open to introduce air, breaking the vacuum in the pipeline, quickly cutting off the siphon water flow, effectively preventing water hammer, protecting the pipeline, pump, and connecting components from impact damage, and improving the safety and service life of the system.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. By replacing the long mechanical shaft transmission with hydraulic transmission, the vibration, sway, resonance, wear and alignment problems caused by the long transmission shaft are fundamentally eliminated, and the stability, reliability and safety of the system operation are significantly improved. 2. The structure is compact and reasonable, integrating hydraulic oil pipes inside the pumping pipe or flexibly arranging them on the outside, which simplifies the overall structure and greatly reduces the installation difficulty and engineering complexity in places with limited space, such as offshore platforms, and facilitates later maintenance. 3. The protective pipe completely isolates the internal oil pipe system (high-pressure pipe and low-pressure pipe) from the external water delivery channel; thus forming a regular, smooth, and continuous annular water passage between the inner wall of the pumping pipe and the outer wall of the protective pipe, significantly reducing water flow resistance and turbulence, ensuring that the water is delivered smoothly and efficiently upward, thereby improving the overall efficiency and head of the water pump. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1; Figure 2 This is a schematic diagram of the cross-sectional structure of the pumping mechanism in Embodiment 1; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the overall structure of Embodiment 2; Figure 5 This is a schematic diagram of the overall structure from another perspective of Embodiment 2.

[0023] Reference numerals: 1. Deck; 2. Pumping mechanism; 21. Pumping pipe; 22. Booster pump; 23. Oil supply assembly; 231. High-pressure oil pipe; 232. Low-pressure oil pipe; 3. Diesel engine; 4. Booster pump; 5. Hydraulic pump tank; 6. Hydraulic pump; 7. Hydraulic motor; 8. Filter cartridge; 9. Protective shell; 10. High-pressure pipe; 11. Low-pressure pipe; 12. Protective pipe; 13. Exhaust pipe; 14. Vacuum breaker valve; 15. Oil unloading pipe. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0025] This application discloses a liquid-driven diesel fire pump device.

[0026] Example 1 Reference Figure 1 and Figure 2 A hydraulically driven diesel fire pump device includes a deck 1, a pumping mechanism 2, a diesel engine 3 fixed on the deck 1, a booster pump 4, and a hydraulic pump tank 5. The hydraulic pump tank 5, the diesel engine 3, and the booster pump 4 are sequentially installed on the deck 1 along its length. The input shaft of the booster pump 4 is connected to the output shaft of the diesel engine 3 via a coupling, and the diesel engine 3 directly drives the booster pump 4. A hydraulic pump 6 is installed on the side of the diesel engine 3 away from the booster pump 4. The hydraulic pump 6 is driven by the diesel engine 3, and its input end is connected to the hydraulic pump tank 5 via a pipe. The pumping mechanism 2 includes a pumping pipe 21 and a lift pump 22. The top end of the pumping pipe 21 is connected to the inlet of the booster pump 4, and a filter cartridge 8 is fixedly installed at the bottom end of the pumping pipe 21. The lift pump 22 is installed inside the pumping pipe 21, and a hydraulic motor 7 for driving the lift pump 22 is fixedly installed inside the pumping pipe 21. The pumping mechanism 2 also includes an oil supply assembly 23 for supplying oil to the hydraulic motor 7.

[0027] A protective shell 9 is fixedly installed inside the water pump pipe 21, and the hydraulic motor 7 is fixedly installed inside the protective shell 9. A gap is left between the outer wall of the protective shell 9 and the inner wall of the water pump pipe 21. In Embodiment 1 of this application, the lift pump 22 is a long-shaft pump, which is located below the protective shell 9. The long-shaft pump includes a pump body, an impeller disposed in the pump body, a pump shaft for driving the impeller, and a bearing body supporting the pump shaft. The upper end of the pump shaft extends into the protective shell 9 and is connected to the output shaft of the hydraulic motor 7 through a coupling, and is driven to rotate by the hydraulic motor 7.

[0028] The oil supply assembly 23 includes a high-pressure oil pipe 231 and a low-pressure oil pipe 232. One end of the high-pressure oil pipe 231 is connected to the output end of the hydraulic pump 6, and the other end of the high-pressure oil pipe 231 is connected to the oil inlet of the hydraulic motor 7. One end of the low-pressure oil pipe 232 is connected to the hydraulic pump oil tank 5, and the other end of the low-pressure oil pipe 232 is connected to the oil return port of the hydraulic motor 7.

[0029] Reference Figure 2 and Figure 3A high-pressure pipe 10 and a low-pressure pipe 11 are installed inside the water suction pipe 21, above the protective shell 9. The high-pressure pipe 10 and low-pressure pipe 11 are installed along the length of the water suction pipe 21, with the high-pressure pipe 10 located inside and concentric with the low-pressure pipe 11. A gap is left between the outer wall of the high-pressure pipe 10 and the inner wall of the low-pressure pipe 11, and a gap is left between the outer wall of the low-pressure pipe 11 and the inner wall of the water suction pipe 21. The top ends of the high-pressure pipe 10 and low-pressure pipe 11 are fixedly connected to the inner wall of the water suction pipe 21, and the bottom ends of the high-pressure pipe 10 and low-pressure pipe 11 pass through the protective shell 9. The low-pressure pipe 11 is connected to the oil return port of the hydraulic motor 7, and the bottom end of the high-pressure pipe 10 passes through the low-pressure pipe 11 and is connected to the oil inlet of the hydraulic motor 7. The end of the high-pressure oil pipe 231 away from the hydraulic pump 6 passes through the water suction pipe 21 and is connected to the high-pressure pipe 10. The end of the low-pressure pipe 11 away from the hydraulic pump oil tank 5 passes through the water suction pipe 21 and is connected to the low-pressure pipe 11.

[0030] A protective pipe 12 is also fixedly installed inside the pumping pipe 21. A pumping channel is formed between the outer wall of the protective pipe 12 and the inner wall of the pumping pipe 21. The low-pressure pipe 11 and the high-pressure pipe 10 are located inside the protective pipe 12 and are concentrically arranged within it. The bottom end of the protective pipe 12 is fixedly connected to the top of the protective shell 9, and the top end of the protective pipe 12 is fixedly connected to the inner wall of the pumping pipe 21. The protective pipe 12 divides the annular space inside the pumping pipe 21 into two parts: the inside of the protective pipe 12 is the oil pipe system, while the annular space between the outer side of the protective pipe 12 and the inner wall of the pumping pipe 21 becomes a regular, smooth, and continuous water passage. The protective shell significantly reduces water flow resistance, ensuring a smooth and efficient upward flow of water, thereby improving the overall efficiency of the pump.

[0031] An exhaust pipe 13 is connected to the outer wall of the pumping pipe 21 near its top, and a vacuum breaker valve 14 is fixedly installed on the exhaust pipe 13. When the fire pump stops working, the water in the pumping pipe 21 will flow back under gravity, creating a vacuum at the top of the pumping pipe 21, producing a "siphon" effect, causing water to be continuously drawn out. After installing the vacuum breaker valve 14, it can automatically open when the pump stops, allowing air to enter the pipeline, breaking the vacuum, thereby immediately cutting off the water flow and preventing unnecessary drainage and energy waste.

[0032] When pumping water, the diesel engine 3 starts, simultaneously driving the hydraulic pump 6 and the booster pump 4. The hydraulic pump 6 draws hydraulic oil from the hydraulic pump tank 5 and delivers it to the high-pressure pipe 10 inside the pumping pipe 21 via the high-pressure oil pipe 231. The high-pressure hydraulic oil enters the inlet of the hydraulic motor 7 through the bottom of the high-pressure pipe 10, driving the hydraulic motor 7 to rotate. The hydraulic motor 7 drives the pump shaft and impeller of the booster pump 22 to rotate at high speed via a coupling, thereby drawing water from the water source (such as seawater). After preliminary filtration by the filter cartridge 8, the water is drawn in through the inlet of the booster pump 22 and enters the pumping pipe 21 through the outlet of the booster pump 22.

[0033] Inside the pumping pipe 21, water flows upward along the annular pumping channel between the outer side of the protective pipe 12 and the inner wall of the pumping pipe 21. The presence of the protective pipe 12, with its regular, smooth, and continuous channel, effectively reduces water flow resistance and ensures that the water is delivered smoothly and efficiently to the inlet of the booster pump 4. The booster pump 4 further pressurizes the water, ultimately outputting high-pressure water for fire extinguishing.

[0034] Simultaneously, the return oil from the hydraulic motor 7 is discharged from the return port, enters the low-pressure pipe 11, and returns to the hydraulic pump oil tank 5 through the low-pressure oil pipe 232, completing the circulation of hydraulic oil. The vacuum breaker valve 14 on the exhaust pipe 13 can expel air during water filling, ensuring that the water pumping pipe 21 is completely filled with water, avoiding cavitation and ensuring stable system operation. Throughout the process, the hydraulic drive system replaces the traditional long drive shaft, avoiding vibration, sway, and wear problems, and improving the reliability and maintenance convenience of the system.

[0035] The implementation principle of this application embodiment is as follows: A hydraulic transmission system replaces the traditional long-shaft mechanical transmission. The power of the diesel engine 3 is converted into hydraulic energy by the hydraulic pump 6, and transmitted via the high-pressure oil pipe 231 and the low-pressure oil pipe 232 to the hydraulic motor 7 at the bottom of the water pumping pipe 21. The hydraulic motor 7 then drives the booster pump 22 (long-shaft pump). This design eliminates the risks of vibration, sway, resonance, and wear caused by the long drive shaft, improving the reliability and stability of the system. Simultaneously, a protective pipe 12 is installed inside the water pumping pipe 21 to separate the high-pressure pipe 10 and the low-pressure pipe 11 from the water flow channel, forming a regular, smooth, and continuous annular water passage. This effectively reduces water flow resistance and ensures that the water is smoothly and efficiently delivered upwards to the booster pump 4. The exhaust pipe 13 and the vacuum breaker valve 14 introduce air in a timely manner to slow down and prevent water backflow, effectively avoiding water hammer and protecting the safety of the entire system.

[0036] Example 2 The difference between this embodiment and Embodiment 1 is that, referring to... Figure 4 and Figure 5 A booster pump 22 is fixedly installed at the inlet of the pumping pipe 21. The inlet and outlet of the booster pump 22 are connected, and a connecting pipe is installed at the inlet of the booster pump 22. A hydraulic motor 7 is fixedly installed on the booster pump 22 and is used to drive the booster pump 22. In this embodiment, the booster pump 22 is a split-case pump. The drive shaft of the hydraulic motor 7 is connected to the pump shaft of the split-case pump and is used to drive the split-case pump. One end of the high-pressure oil pipe 231 is connected to the output end of the hydraulic pump 6, and the other end of the high-pressure oil pipe 231 is connected to the oil inlet of the hydraulic motor 7. One end of the low-pressure oil pipe 232 is connected to the hydraulic pump oil tank 5, and the other end of the low-pressure oil pipe 232 is connected to the return port of the hydraulic motor 7.

[0037] To further ensure the long-term reliable operation of the hydraulic motor 7, an oil drain pipe 15 is also provided on the hydraulic motor 7. One end of the oil drain pipe 15 is connected to the oil drain port of the hydraulic motor 7 housing to collect the oil generated inside the hydraulic motor 7 due to minor leakage from the seal; the other end of the oil drain pipe 15 is directly led back to the hydraulic pump oil tank 5. This design can prevent lubricating oil from accumulating inside the motor housing, avoid damage to the shaft seal of the hydraulic motor 7, ensure its smooth operation, and extend its service life.

[0038] When pumping water, diesel engine 3 starts, simultaneously driving hydraulic pump 6 and booster pump 4. Hydraulic pump 6 draws hydraulic oil from hydraulic pump tank 5 and delivers high-pressure hydraulic oil directly to the inlet of hydraulic motor 7 mounted on booster pump 22 (split-case pump) through high-pressure oil pipe 231, driving hydraulic motor 7 to rotate. Hydraulic motor 7 directly drives the impeller of split-case pump to rotate at high speed through its output shaft.

[0039] The split-case pump draws water from its inlet pipe. After gaining initial kinetic and pressure energy within the pump, the water is discharged from the outlet of the split-case pump and directly enters the pumping pipe 21. Subsequently, the water flows upward within the pumping pipe 21 and is delivered to the inlet of the booster pump 4 installed on the deck 1 level.

[0040] The booster pump 4, directly driven by the diesel engine 3, repressurizes the incoming water, ultimately producing a high-pressure water flow that meets fire protection requirements and outputs it.

[0041] Meanwhile, the low-pressure return oil generated after driving the hydraulic motor 7 returns directly from the return port of the hydraulic motor 7 to the hydraulic pump oil tank 5 via the low-pressure oil pipe 232, completing the circulation of the main oil pipe. In addition, to ensure the long-term stable operation of the hydraulic motor 7, a specially designed oil drain pipe 15 guides any trace amount of oil that may leak from the internal seals of the hydraulic motor 7 back to the hydraulic pump oil tank 5 through its housing drain port, effectively preventing the accumulation of fluid inside the housing from damaging the shaft seal.

[0042] Throughout the entire working process, by integrating the hydraulic motor 7 and the split-case pump into an external module and connecting them with external oil pipes, the internal structure of the pumping pipe 21 is significantly simplified, making installation and maintenance more convenient. At the same time, it completely avoids the vibration, wear, and alignment problems caused by traditional long drive shafts, making the system operation more stable and reliable.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hydraulically driven diesel fire pump device, characterized in that, The system includes a deck (1), a diesel engine (3) fixed on the deck (1), a booster pump (4), and a hydraulic pump tank (5); a hydraulic pump (6) is installed on the diesel engine (3), and the input end of the hydraulic pump (6) is connected to the hydraulic pump tank (5) through a pipe. The system is characterized by further including a water pumping mechanism (2), which includes a water pumping pipe (21), a booster pump (22), and an oil supply assembly (23). The top end of the water pumping pipe (21) is connected to the inlet of the booster pump (4), and the bottom end of the water pumping pipe (21) is... In water, the lift pump (22) is fixedly installed in the water pumping pipe (21) near the bottom. The water pumping pipe (21) is equipped with a hydraulic motor (7) for driving the lift pump (22). The oil supply assembly (23) includes a high-pressure oil pipe (231) and a low-pressure oil pipe (232). The high-pressure oil pipe (231) is connected between the output end of the hydraulic pump (6) and the oil inlet of the hydraulic motor (7). The low-pressure oil pipe (232) is connected between the return oil port of the hydraulic motor (7) and the hydraulic pump tank (5).

2. The hydraulically driven diesel fire pump device according to claim 1, characterized in that, The pumping pipe (21) is equipped with a high-pressure pipe (10) and a low-pressure pipe (11). The high-pressure pipe (10) is located inside the low-pressure pipe (11) and is arranged concentrically. There is a gap between the outer wall of the low-pressure pipe (11) and the inner wall of the pumping pipe (21). There is a gap between the outer wall of the high-pressure pipe (10) and the inner wall of the low-pressure pipe (11). The top ends of the high-pressure pipe (10) and the low-pressure pipe (11) are fixedly connected to the inner wall of the pumping pipe (21). The bottom end of the low-pressure pipe (11) is connected to the oil return port of the hydraulic motor (7). The bottom end of the high-pressure pipe (10) passes through the low-pressure pipe (11) and is connected to the oil inlet of the hydraulic motor (7).

3. The hydraulically driven diesel fire pump device according to claim 1, characterized in that, The booster pump (22) is fixedly installed at the bottom end of the pumping pipe (21), the top end of the pumping pipe (21) is connected to the booster pump (4), the booster pump (22) is equipped with a hydraulic motor (7) for driving its operation, and the inlet of the booster pump (22) is connected to a water supply pipe.

4. The hydraulically driven diesel fire pump device according to claim 3, characterized in that, The high-pressure oil pipe (231) and the low-pressure oil pipe (232) are located on both sides of the outer wall of the water pump (21). One end of the high-pressure oil pipe (231) is connected to the output end of the hydraulic pump (6), and the other end of the high-pressure oil pipe (231) is connected to the oil inlet of the hydraulic motor (7). One end of the low-pressure oil pipe (232) is connected to the hydraulic pump oil tank (5), and the other end of the low-pressure oil pipe (232) is connected to the oil return port of the hydraulic motor (7).

5. A hydraulically driven diesel fire pump device according to claim 2, characterized in that, The water pump (21) is provided with a protective shell (9), which is located above the lift pump (22). A fixed seat is provided inside the protective shell (9), and the hydraulic motor (7) is located inside the protective shell (9) and fixedly installed on the fixed seat.

6. A hydraulically driven diesel fire pump device according to claim 5, characterized in that, The pumping pipe (21) is also provided with a protective pipe (12). The protective pipe (12) is sleeved on the periphery of the low-pressure pipe (11). There is a gap between the outer wall of the low-pressure pipe (11) and the inner wall of the protective pipe (12). The bottom end of the protective pipe (12) is connected to the protective shell (9), and the top of the protective pipe (12) is connected to the inner wall of the pumping pipe (21).

7. A hydraulically driven diesel fire pump device according to claim 6, characterized in that, A filter cylinder (8) is installed at the end of the water pump (21) away from the booster pump (4).

8. A hydraulically driven diesel fire pump device according to claim 7, characterized in that, An exhaust pipe (13) is connected to the water pumping pipe (21), and a vacuum breaker valve (14) is installed on the exhaust pipe (13).

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