A liquid tank built-in water pump device

Abstract

The utility model discloses a kind of liquid tank built-in water pump devices, it is related to emergency fire rescue equipment technical field, including power takeoff, transmission shaft, water pump shaft joint, sealing flange seat, water pump, water pump support, pump water main line, cannon water line and side water line;Water pump is horizontal structure, built-in installation in liquid tank intermediate groove space, its water inlet end is fixed in the inboard of liquid tank front end plate;Sealing flange seat is installed in the outside of liquid tank front end plate, for supporting water pump shaft joint and realizing liquid tank sealing.By built-in liquid tank intermediate groove space of horizontal water pump, transmission shaft does not need to pass through tank bottom, so that liquid tank bottom plate can be moved down 150~200mm, liquid tank volume can increase 10%~15%, significantly improve fire extinguishing agent liquid load quantity;While raw water pump house water pump, pipeline etc. Large parts are removed, only control and instrument panel are retained, 80% space is emptied to transform into equipment box, without sacrificing liquid load quantity, the kind and quantity of fire rescue tool and equipment can be increased, and on-site rescue ability is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of emergency fire rescue equipment technology, specifically, it relates to a liquid tank built-in water pump device. Background Technology

[0002] In the field of emergency fire rescue, fire-fighting combat fire trucks and water / liquid supply fire trucks are constructed from a cargo chassis and a fire-fighting superstructure. The fire-fighting superstructure includes a front equipment box, a middle liquid tank, and a rear pump room. According to national standards (GB7956.1-2014), fire-fighting combat fire trucks and water / liquid supply fire trucks, in addition to carrying a certain amount of water and foam extinguishing agents and installing a fire pump system, must also have sufficient space to accommodate as many necessary fire rescue tools and equipment as possible. The liquid tank contains the extinguishing agent, the equipment box contains fire rescue tools and equipment, and the pump room centrally houses the fire pump system. The fire pump system is a crucial core component for fire trucks in extinguishing fires and supplying liquids and water, including numerous components such as fire pumps, pipelines, valves, controls, and instruments. Currently, most fire truck pump systems are rear-mounted and centrally located in the pump room. The water pump in the water pump system is powered by the chassis engine. A full-power power take-off is installed on the chassis gearbox. The power take-off and a multi-shaft transmission system transmit power from the front of the vehicle to the water pump at the rear of the vehicle, driving the water pump to rotate and output pressurized water and other extinguishing agents for fire suppression.

[0003] Because the transmission system connects to the power take-off at one end, passes through the bottom of the carriage to the pump room, and connects to the pump at the other end, the power transmission distance is relatively large, ranging from 4000 to 7000 mm. It consists of 4 to 7 drive shafts and drive shaft supports. The transmission system has a large number of drive shafts and supports, requiring increased strength for the drive shafts and higher installation precision for the supports. In order to leave enough space for the installation of the transmission system, the outriggers at the bottom of the carriage must be raised, and the bottom plates of the equipment box and liquid tank must be moved upward by 150 to 200 mm. This reduces the space in the equipment box, decreases the number of equipment to be installed, and also reduces the volume of the liquid tank, resulting in a 10% to 15% reduction in liquid capacity.

[0004] Currently, all main urban fire trucks and airport rapid response fire trucks are designed and manufactured with smaller liquid tanks and reduced liquid volume to meet the requirements of carrying a certain type and quantity of fire rescue tools and equipment. Secondly, the space inside the pump room is limited, and the number of pipes, valves, sensors, interfaces, cables, instruments, control handles and buttons in the pump system is large, and the horizontal and vertical connections are also concentrated. The entire pump system is relatively complicated, and there will be many difficulties in installation, operation and maintenance.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies.

[0006] Therefore, in order to solve the above problems, this utility model provides a liquid tank built-in water pump device. Utility Model Content

[0007] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a liquid tank built-in water pump device.

[0008] The objective of this utility model can be achieved through the following technical solutions: A liquid tank built-in water pump device includes a power take-off, a drive shaft, a water pump shaft joint, a sealing flange seat, a water pump, a water pump support, a pump outlet main pipeline, a cannon outlet pipeline, and a side outlet pipeline. The water pump has a horizontal structure and is installed inside the trough-shaped space in the middle of the liquid tank. Its water inlet end is fixed to the inside of the front plate of the liquid tank. The sealing flange seat is installed on the outside of the front end plate of the liquid tank to support the water pump shaft joint and achieve liquid tank sealing. The water pump shaft joint passes through the sealing flange seat and is connected to the horizontal water pump drive. The water pump shaft joint is also connected to the power take-off via the drive shaft. The upper end of the water pump support is connected to the water pump, and the lower end is fixed to the bottom plate of the liquid tank. The main pump outlet pipeline includes a pump outlet connector, a pump outlet flexible connector and a pump outlet main pipe connected in sequence, and the pump outlet connector is connected to the outlet end of the horizontal water pump. The side outlet water pipe includes a three-way water pipe, a left outlet water pipe and a right outlet water pipe. The middle interface of the three-way water pipe is connected to the main outlet water pipe of the pump, and the left and right ends are fixed to the two side plates of the middle water tank of the liquid tank through pipe flanges. The left and right ends of the three-way water pipe are respectively connected to the left outlet water pipe and the right outlet water pipe.

[0009] As a preferred embodiment of this utility model, the cannon outlet pipeline includes a cannon branch pipe flexible joint, a cannon outlet branch pipe and a cannon mounting base connected in sequence, and the cannon branch pipe flexible joint is connected to the pump outlet main pipe.

[0010] As a preferred technical solution of this utility model, the left water outlet pipeline includes a left water outlet pipe, a left water outlet valve and a left water outlet interface connected in sequence. The left water outlet pipe is Y-shaped, and its inlet end is connected to one end of a three-way water pipe. A left water outlet valve is installed on each of its branch ends, and the left water outlet interface is installed on the interface of the left water outlet valve. The right water outlet pipeline includes a right water outlet pipe, a right water outlet valve, and a right water outlet interface connected in sequence. The right water outlet pipe is Y-shaped, with its inlet end connected to the other end of a three-way water pipe. A right water outlet valve is installed on each of its branch ends, and the right water outlet interface is installed on the interface of the right water outlet valve.

[0011] As a preferred technical solution of this utility model, the bottom of the liquid tank is provided with a tank drain port, which is used to drain the medium in the liquid tank to facilitate the maintenance of the water pump system.

[0012] As a preferred technical solution of this utility model, the transmission shaft is a single structure with a total length of 20% to 30% of the original multi-segment transmission shaft, and there is no need to set a transmission shaft support.

[0013] As a preferred technical solution of this utility model, the sealing flange seat is an annular sealing structure, and a sealing groove is provided on the outer side of the contact surface with the front end plate of the liquid tank. A sealing element is adapted to be installed in the groove to achieve liquid sealing.

[0014] As a preferred technical solution of this utility model, the water pump support is a rigid support structure, with its upper end welded and fixed to the bottom of the water pump outlet, and its lower end welded and fixed to the bottom plate of the liquid tank. The height of the water pump support is adapted to the horizontal installation requirements of the water pump.

[0015] As a preferred technical solution of this utility model, the pump outlet flexible joint and the gun branch pipe flexible joint are both elastic sealing connectors with a corrosion-resistant layer on their inner wall, which is used to absorb pipeline vibration and compensate for installation deviation.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, by embedding the horizontal water pump into the middle groove-shaped space of the liquid tank, the drive shaft does not need to pass through the bottom of the tank, allowing the bottom plate of the liquid tank to be lowered by 150-200mm, increasing the volume by 10%-15%, and significantly improving the liquid capacity of the extinguishing agent; at the same time, the large components such as water pumps and pipelines in the original water pump room are moved out, leaving only the control and instrument panel, freeing up 80% of the space to be converted into equipment boxes, which can increase the types and quantities of fire rescue tools and equipment without sacrificing the liquid capacity, thereby enhancing on-site rescue capabilities.

[0017] 2. In this utility model, the water pump system and transmission system are greatly simplified, eliminating the original complex inlet water pipeline and reducing the outlet water pipeline. The cannon output pipeline can be directly connected to the cannon base on the top of the tank, and the side water delivery path extends directly from both sides of the tank. The dispersed arrangement of pipelines makes installation and operation easier. The transmission system is simplified from the original 4 to 7 drive shafts and multiple supports to a single short-pitch drive shaft (the length is only 20% to 30% of the original), and no support is required, which reduces the installation accuracy requirements. At the same time, the tank bottom drain port can quickly empty the medium, making it convenient to enter the tank for maintenance and greatly improving the convenience of operation and maintenance.

[0018] 3. In terms of production and cost control, compared with the original structure, the system simplifies and reduces redundant parts and assembly processes, which can save 3% to 5% of material costs and 2% to 3% of labor costs, while shortening the production period by 5% to 10%, thereby improving production efficiency and economy.

[0019] 4. In this utility model, the straight water delivery path and multi-directional liquid supply design (simultaneous liquid supply from fire monitors and water hoses on both sides) ensure the smooth delivery of pressurized water. Combined with the dual improvement of liquid capacity and equipment loading capacity, the fire truck can exert greater power at the emergency rescue site, improving rescue efficiency and flexibility. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is the front view of the present invention; Figure 2 This is a side view of the present invention.

[0022] Figure label: 1. Power take-off (PTO); 2. Drive shaft; 3. Pump shaft connector; 4. Sealing flange seat; 5. Pump; 6. Pump support; 7. Pump outlet pipe; 8. Pump outlet flexible connector; 9. Tank drain port; 10. Cannon outlet branch pipe; 11. Cannon branch pipe flexible connector; 12. Pump outlet main pipe; 13. Cannon mounting base; 14. Liquid tank; 15. T-shaped water pipe; 16. Left outlet pipe; 17. Left outlet valve; 18. Left outlet interface; 19. Right outlet pipe; 20. Right outlet valve; 21. Right outlet interface. Detailed Implementation

[0023] The utility model will now be further described with reference to the accompanying drawings and specific embodiments: Example: Please refer to Figure 1 and Figure 2 According to an embodiment of the present utility model, a liquid tank built-in water pump device includes a power take-off 1, a drive shaft 2, a water pump shaft joint 3, a sealing flange seat 4, a water pump 5, a water pump support 6, a pump outlet main pipeline, a cannon outlet pipeline, and a side outlet pipeline. Please see Figure 1 and Figure 2 The water pump 5 has a horizontal structure and is installed inside the trough-shaped space in the middle of the liquid tank 14. Its water inlet is fixed to the inside of the front plate of the liquid tank 14. The horizontal water pump 5 adopts an internal installation method, replacing the traditional seated water pump in the pump room. It draws water directly from the liquid tank 14, eliminating the original complex water inlet pipeline and simplifying the water pump system structure. At the same time, it allows the bottom plate of the liquid tank 14 to be lowered by 150-200mm, which greatly increases the volume and has a high space utilization rate. It not only increases the liquid carrying capacity, but also frees up 80% of the space in the pump room for loading fire-fighting equipment, achieving a double increase in liquid carrying capacity and equipment loading capacity. Please see Figure 1 and Figure 2 The sealing flange seat 4 is installed on the outside of the front plate of the liquid tank 14 to support the water pump shaft joint 3 and achieve liquid tank sealing. The water pump shaft joint 3 passes through the sealing flange seat 4 and is connected to the horizontal water pump 5. The water pump shaft joint 3 is connected to the power take-off 1 through the drive shaft 2. The power take-off 1 serves as a connecting component for the power source, obtains power from the chassis engine and transmits it to the drive shaft to ensure the power supply for the operation of the water pump. No additional power device is required, which reduces the modification cost and technical complexity. The drive shaft 2 transmits the power of the power take-off 1 to the water pump 5. The water pump shaft joint 3 connects the drive shaft 2 and the horizontal water pump 5 to achieve smooth power transmission, ensure the continuity of power transmission, and avoid power loss or vibration. The sealing flange seat 4 has both supporting and sealing functions. On the one hand, it provides stable support for the water pump shaft joint 3. On the other hand, it prevents the leakage of fire extinguishing agent through the annular sealing structure and sealing element. Please see Figure 1 and Figure 2 The upper end of the water pump support 6 is connected to the water pump 5, and the lower end is fixed to the bottom plate of the liquid tank 14. The water pump support 6 fixes the horizontal water pump 5, ensuring the horizontal accuracy and stability of the water pump 5 installation, avoiding displacement or damage caused by vibration during the operation of the water pump 5, and ensuring the accurate position of the inlet and outlet ends. Please see Figure 1 and Figure 2 The main water outlet pipeline includes a pump outlet connector 7, a pump outlet flexible connector 8, and a pump outlet main pipe 12 connected in sequence, and the pump outlet connector 7 is connected to the outlet end of the horizontal water pump 5; the side water outlet pipeline includes a tee pipe 15, a left water outlet pipeline, and a right water outlet pipeline. The middle interface of the tee pipe 15 is connected to the pump outlet main pipe 12, and the left and right ends are fixed to the two side plates of the middle water tank of the liquid tank 14 through pipe flanges, and the left and right ends of the tee pipe 15 are connected to the left water outlet pipeline and the right water outlet pipeline, respectively; the pump outlet main pipeline and the side water outlet pipeline form a multi-path water transmission channel to meet the liquid supply needs of the fire hoses on both sides, realize the decentralized arrangement of water transmission paths, and avoid the problem of pipeline congestion in the original pump room.

[0024] Please see Figure 1 The fire monitor water outlet pipeline includes a fire monitor branch flexible joint 11, a fire monitor water outlet branch pipe 10, and a fire monitor mounting base 13 connected in sequence. The fire monitor branch flexible joint 11 is connected to the pump water outlet main pipe 12. By limiting the sequential connection of the fire monitor branch flexible joint 11, the fire monitor water outlet branch pipe 10, and the fire monitor mounting base 13, a straight layout of the fire monitor output pipeline is achieved, reducing the bends and redundant components of the original pipeline, avoiding pipeline congestion, improving the water delivery efficiency of the fire monitor, and the straight connection structure is more convenient for installation and maintenance.

[0025] Please see Figure 2The left outlet pipeline includes a left outlet pipe 16, a left outlet valve 17, and a left outlet interface 18 connected in sequence. The left outlet pipe 16 is Y-shaped, with its inlet end connected to one end of a three-way water pipe 15. A left outlet valve 17 is installed on each of its branch ends, and the left outlet interface 18 is installed on the interface of the left outlet valve 17. The right outlet pipeline includes a right outlet pipe 19, a right outlet valve 20, and a right outlet interface 21 connected in sequence. The right outlet pipe 19 is Y-shaped, with its inlet end connected to the other end of a three-way water pipe 15. A right outlet valve 20 is installed on each of its branch ends, and the right outlet interface 21 is installed on the interface of the right outlet valve 20. The design of the left and right outlet pipelines ensures the stability and reliability of the water supply paths on both sides, guarantees a stable supply of liquid to the fire hose and fire nozzle, and improves the flexibility of on-site rescue.

[0026] Please see Figure 1 The bottom of the liquid tank 14 is equipped with a drain port 9, which is used to empty the medium in the liquid tank to facilitate the maintenance of the water pump system. The drain port 9 provides a dedicated channel for emptying the medium in the liquid tank, which solves the problem of the medium in the liquid tank being difficult to clean during the maintenance of the water pump system. The fire extinguishing agent can be emptied through the drain port to enter the tank for maintenance. The operation is convenient and does not require complicated auxiliary procedures, which greatly shortens the maintenance preparation time, improves the efficiency of equipment maintenance, and reduces maintenance costs.

[0027] Please see Figure 1 The drive shaft 2 is a single structure, with a total length of 20% to 30% of the original multi-segment drive shaft. It does not require drive shaft supports, reducing the original 4-7 drive shafts to a single shaft, shortening the length to 20% to 30% of the original length, and eliminating the need for supports. This not only reduces the installation accuracy requirements but also frees up space for the liquid tank bottom plate to be lowered, increasing the liquid tank volume by 10% to 15%. It also simplifies the assembly and maintenance process of the transmission system and directly increases the liquid carrying capacity of the fire truck, meeting the equipment loading requirements without sacrificing the liquid carrying capacity.

[0028] Please see Figure 1 The sealing flange seat 4 is an annular sealing structure. It has a sealing groove on the outer side of the front plate of the liquid tank 14. A sealing element is installed in the groove to achieve liquid sealing. The annular sealing structure and sealing groove design of the sealing flange seat 4 can effectively prevent the leakage of fire extinguishing agent in the liquid tank, and at the same time provide reliable support for the water pump shaft joint 3 to avoid shaking or displacement during power transmission.

[0029] Please see Figure 1The water pump support 6 is a rigid support structure. Its upper end is welded and fixed to the bottom of the water pump 5 outlet, and its lower end is welded and fixed to the bottom plate of the liquid tank 14. The height of the water pump support 6 is adapted to the horizontal installation requirements of the water pump 5. The design of the rigid support structure and welding fixing method of the water pump support enables the stable installation of the horizontal water pump 5, ensures the horizontal position accuracy of the water pump inlet and outlet, avoids displacement or damage caused by vibration during the operation of the water pump 5, and ensures the smoothness of the water delivery path.

[0030] Please see Figure 1 The pump outlet flexible joint 8 and the cannon branch pipe flexible joint 11 are both elastic sealing connectors with a corrosion-resistant layer on their inner wall to absorb pipeline vibration and compensate for installation deviations. The elastic sealing characteristics of the flexible joint and the design of the corrosion-resistant layer can absorb pipeline vibration, compensate for installation deviations, resist the corrosion of fire extinguishing agents, reduce the impact of vibration on the pipeline during fire truck operation, avoid leakage at pipeline connections, and extend the service life of the pipeline.

[0031] The working principle of a water pump device built into a liquid tank is as follows: a horizontal water pump 5 is installed in the middle trough-shaped space of the liquid tank 14. Its power comes from the chassis engine via the power take-off unit 1 on the gearbox, which drives the shaft of the water pump 5 to rotate through the drive shaft 2 and the water pump shaft connector 3. The pump outlet pipe 7, the pump outlet flexible connector 8, and the pump outlet main pipe 12 are sequentially connected to form the "water pump outlet main pipeline". The cannon branch pipe flexible connector 11, the cannon outlet branch pipe 10, and the cannon mounting base 13 are sequentially connected to form the "cannon outlet pipeline", which is connected to the pump outlet main pipe 12. The left outlet pipe 16, the left outlet valve 17, and the left outlet interface 18 are sequentially connected to form the "left outlet pipeline", which is connected to the left outlet of the three-way water pipe 15. The right outlet pipe 19, the right outlet valve 20, and the right outlet interface 21 are sequentially connected to form the "right outlet pipeline", which is connected to the right outlet of the three-way water pipe 15. The pressurized water output from pump 5 is delivered to the fire monitor via the "pump outlet main line" and the "monitor outlet line" for fire extinguishing. The pressurized water output from pump 5 is also delivered from the left side to the fire hose and fire nozzle via the "pump outlet main line" and the "left outlet line" for fire extinguishing. The pressurized water output from pump 5 is also delivered from the right side to the fire hose and fire nozzle via the "pump outlet main line" and the "right outlet line" for fire extinguishing. When any component of the pump system requires maintenance, the water or laboratory extinguishing agent in the tank can be drained from the tank drain port 9 before entering the tank for inspection.

[0032] After the built-in water pump device in this liquid tank is implemented on a fire truck, the fire truck's water pump transmission system is reduced from the original long-distance multiple drive shafts and multiple supports to a short-distance single drive shaft 2 and no supports; the bottom plate and support beam of the liquid tank 14 can be moved downward by 150-200mm, increasing the internal volume of the liquid tank 14 and increasing the fire truck's liquid carrying capacity by 10%-15%; the pump room of this vehicle does not have an on-board water pump system (including inlet pipe, outlet pipe, valves, pipe interfaces and other accessories), leaving more space to add more types and quantities of fire rescue tools and equipment, enhancing the vehicle's rescue capability at emergency fire scene.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water pump device built into a liquid tank, characterized in that: Includes a power take-off (1), a drive shaft (2), a water pump shaft joint (3), a sealing flange seat (4), a water pump (5), a water pump support (6), a main water outlet pipeline, a water outlet pipeline for the blasting cannon, and a side water outlet pipeline; The water pump (5) is a horizontal structure and is installed in the middle groove space of the liquid tank (14). Its water inlet end is fixed to the inside of the front plate of the liquid tank (14). The sealing flange seat (4) is installed on the outside of the front end plate of the liquid tank (14) to support the water pump shaft joint (3) and achieve liquid tank sealing. The water pump shaft joint (3) passes through the sealing flange seat (4) and is connected to the horizontal water pump (5) for transmission. The water pump shaft joint (3) is connected to the power take-off (1) through the transmission shaft (2). The upper end of the water pump support (6) is connected to the water pump (5), and the lower end is fixed to the bottom plate of the liquid tank (14); The main water outlet pipeline includes a pump outlet connector (7), a pump outlet flexible connector (8), and a pump outlet main pipe (12) connected in sequence, and the pump outlet connector (7) is connected to the outlet end of the horizontal water pump (5). The side outlet water pipe includes a three-way water pipe (15), a left outlet water pipe and a right outlet water pipe. The middle interface of the three-way water pipe (15) is connected to the main outlet water pipe of the pump (12), and the left and right ends are fixed to the two side plates of the middle water tank of the liquid tank (14) through pipe flanges. The left and right ends of the three-way water pipe (15) are respectively connected to the left outlet water pipe and the right outlet water pipe.

2. The liquid tank built-in water pump device according to claim 1, characterized in that: The cannon outlet pipeline includes a cannon branch flexible joint (11), a cannon outlet branch pipe (10) and a cannon mounting base (13) connected in sequence, and the cannon branch flexible joint (11) is connected to the pump outlet main pipe (12).

3. The liquid tank built-in water pump device according to claim 1, characterized in that: The left water outlet pipeline includes a left water outlet pipe (16), a left water outlet valve (17) and a left water outlet interface (18) connected in sequence. The left water outlet pipe (16) is Y-shaped, and its inlet end is connected to one end of a three-way water pipe (15). A left water outlet valve (17) is installed on each of its branch ends. The left water outlet interface (18) is installed on the interface of the left water outlet valve (17). The right water outlet pipeline includes a right water outlet pipe (19), a right water outlet valve (20), and a right water outlet interface (21) connected in sequence. The right water outlet pipe (19) is Y-shaped, and its inlet end is connected to the other end of the three-way water pipe (15). A right water outlet valve (20) is installed on each of its branch ends. The right water outlet interface (21) is installed on the interface of the right water outlet valve (20).

4. The liquid tank built-in water pump device according to claim 1, characterized in that: The liquid tank (14) is provided with a drain port (9) at the bottom. The drain port (9) is used to drain the medium in the liquid tank to facilitate the maintenance of the water pump system.

5. The liquid tank built-in water pump device according to claim 1, characterized in that: The drive shaft (2) is a single structure with a total length of 20% to 30% of the original multi-segment drive shaft, and there is no need to set a drive shaft support.

6. The liquid tank built-in water pump device according to claim 1, characterized in that: The sealing flange seat (4) is an annular sealing structure. It has a sealing groove on the outer side of the front plate of the liquid tank (14). A sealing element is installed in the groove to achieve liquid sealing.

7. The liquid tank built-in water pump device according to claim 1, characterized in that: The pump support (6) is a rigid support structure. Its upper end is welded and fixed to the bottom of the water outlet of the pump (5), and its lower end is welded and fixed to the bottom plate of the liquid tank (14). The height of the pump support (6) is adapted to the horizontal installation requirements of the pump (5).

8. The liquid tank built-in water pump device according to claim 1, characterized in that: The pump outlet flexible joint (8) and the gun branch flexible joint (11) are both elastic sealing connectors with a corrosion-resistant layer on their inner wall, which is used to absorb pipeline vibration and compensate for installation deviation.

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