Agricultural high-power self-priming pump

Abstract

The application relates to a kind of agricultural strong self-priming pumps, belonging to the technical field of self-priming pump;Including upper liquid storage pipe and lower liquid storage pipe, upper liquid storage pipe and lower liquid storage pipe are fixedly connected by connecting seat, and communication groove and backflow hole are arranged on the connecting seat, water-cooled water-filled motor is fixedly arranged in the inside of upper liquid storage pipe, the output shaft of water-cooled water-filled motor is downwardly inserted into the inside of lower liquid storage pipe and fixedly arranged with multiple groups of impeller assemblies;Liquid inlet pipe and blowdown pipe are respectively arranged on the two sides of lower liquid storage pipe, constant pressure filter assembly is arranged on the inlet end of liquid inlet pipe, blowdown assembly is arranged in the inside of blowdown pipe;Multiple protection cylinders are fixedly arranged on the outside lower end of lower liquid storage pipe, a group of fixed assemblies are arranged in the inside of each protection cylinder;Liquid outlet pipe is fixedly arranged on one side of upper liquid storage pipe;Solve the current self-priming pump work easily tilt subsidence, easy to block, need to reinfuse liquid when restarting, discharge pressure is too large, and the service life of impeller is short.

Description

Technical Field

[0001] This invention belongs to the field of self-priming pump technology, specifically relating to a powerful self-priming pump for agricultural use. Background Technology

[0002] In the field of agricultural irrigation, self-priming pumps are the core equipment for farmland water supply. Their installation stability, fluid transport efficiency, and operational adaptability directly affect the efficiency and cost of irrigation operations. However, in practical applications, existing agricultural self-priming pumps have gradually revealed many technical defects due to the complex environment of farmland and riverbeds, the characteristics of irrigation water impurities, and the diverse irrigation needs in various scenarios. These defects make it difficult to meet the demands of efficient, stable, and low-cost agricultural production. Specific problems are as follows:

[0003] The water sources for farmland irrigation are mostly rivers, ponds, or field reservoirs. These riverbeds often have uneven surfaces, containing stones, hard soil layers, or loose silt and sand. Traditional methods of fixing agricultural self-priming pumps rely on precise manual leveling followed by pressing with heavy objects, pouring cement, or using simple supports. This is not only cumbersome and time-consuming but also has significant limitations: Firstly, when the fixing components come into contact with hard surfaces, the lack of a buffer structure can easily lead to damage to the drive motor or fixing components due to impact. Secondly, in soft silt and sand environments, the fixing structure is prone to sinking and the equipment to tilt, affecting the normal operation of the pump. For drive motors of different power specifications, custom-made mounting brackets are required, resulting in poor versatility. Furthermore, vibrations generated during motor operation can easily lead to loosening of the mounting structure and motor displacement, causing sealing failures at pipe connections and irrigation water leaks. This wastes water resources and increases equipment maintenance costs. In addition, traditional self-priming pumps lack adjustable structures to adapt to different installation environments. For pipes or drive components of varying heights, additional auxiliary brackets are needed, further increasing space requirements and the number of components. This does not meet the compactness requirements of farmland operations, where irrigation water often contains large particles such as silt, crop residues, and weeds. Particulate impurities are a concern. Existing self-priming pumps typically use a single filter screen design, which easily accumulates and clogs the screen during operation, requiring frequent manual disassembly and cleaning. This not only interrupts irrigation work but also increases maintenance workload. Furthermore, when the pump stops, the siphon effect can cause liquid remaining in the pump chamber to flow back to the water source, requiring refilling before restarting – a cumbersome and time-consuming process. Additionally, existing self-priming pumps often use simple valve controls for drainage, making it impossible to adjust the drainage speed. This can lead to excessive instantaneous drainage pressure, causing pipe impact and liquid splashing, posing a risk to manual operation. There is a risk of injury to personnel or damage to equipment; moreover, the lack of an efficient negative pressure formation structure in the outlet pipeline results in slow negative pressure establishment during the initial startup, leading to water supply delays and affecting irrigation efficiency. Existing agricultural self-priming pumps mostly use a single impeller structure for their drive components. During operation, the impeller is prone to increased energy consumption due to excessive axial force, which not only increases operating costs but also shortens the impeller's service life due to long-term uneven stress. At the same time, the impeller's head is fixed, requiring the replacement of self-priming pumps of different specifications or the customization of special drive components for different irrigation heights, resulting in poor versatility and significantly increasing equipment investment costs. Therefore, the above problems need to be solved. Summary of the Invention

[0004] This invention overcomes the shortcomings of the prior art and proposes a powerful self-priming pump for agriculture; it solves the problems of current self-priming pumps that are prone to tilting and sinking during operation, easy to get clogged, require refilling with liquid when restarting, have excessive discharge pressure, and have short impeller life.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0006] A powerful self-priming pump for agriculture includes an upper and lower liquid storage pipe distributed vertically, which are fixedly connected by a connecting seat. The connecting seat is provided with a connecting groove and a return hole. A water-cooled water-filling motor is fixedly installed inside the upper liquid storage pipe, and the output shaft of the water-cooled water-filling motor extends downward into the lower liquid storage pipe. Multiple impeller assemblies are fixedly installed outside the output shaft of the water-cooled water-filling motor. An inlet pipe and a drain pipe are respectively provided on both sides of the lower liquid storage pipe. A constant pressure filter assembly is provided at the inlet end of the inlet pipe, and a drain assembly is provided inside the drain pipe. Multiple protective cylinders are fixedly installed at the lower outer side of the lower liquid storage pipe. Each protective cylinder contains a set of fixing components, including a auger drill, which is drilled into the mud and sand to fix the self-priming pump. An outlet pipe is fixedly installed on one side of the upper liquid storage pipe, and an outlet assembly is provided inside the outlet pipe.

[0007] Furthermore, a detachable top cover is fixedly installed at the upper opening of the upper liquid storage tube. A hook, an automatic air vent valve, and a liquid inlet are fixedly installed on the upper end of the top cover. A connecting seat is located between the lower opening of the upper liquid storage tube and the upper opening of the lower liquid storage tube. A ring of reflux holes is provided at the inner edge of the connecting seat, and a ring of connecting grooves is provided at the outer edge of the connecting seat. The output shaft of the water-cooled water-filling motor passes downward through the central hole of the connecting seat.

[0008] Furthermore, the constant pressure filtration assembly includes a constant pressure pipe, a connecting pipe, a filter pipe, an automatic air intake valve, a support platform, an end cap, a first support platform, a filter screen, a rotating rod, a cleaning scraper, and a turbine. The constant pressure pipe, connecting pipe, and filter pipe are sequentially fixed to the outside of the inlet end of the inlet pipe. An automatic air intake valve is fixed to the side wall of the constant pressure pipe. A first support platform is fixed to the inside of the filter pipe near the connecting pipe end, and a filter screen is fixed to the end of the filter pipe away from the connecting pipe. A rotating rod is rotatably mounted on the first support platform, with the end of the rotating rod away from the first support platform extending to the outside of the filter screen. A turbine is fixed to the outside of the rotating rod located between the first support platform and the filter screen. A cleaning scraper is fixed to the outside of the rotating rod located outside the filter screen. A support platform is fixed to the inside of the opening at the end of the constant pressure pipe away from the inlet pipe, with the opening at the end of the support platform near the inlet pipe tilted and rotatably fitted with an end cap.

[0009] Furthermore, the sewage discharge assembly includes a one-way platform, a one-way ball, a first spring, and a screw plug; a one-way platform is fixedly installed on the inner wall of one end of the sewage discharge pipe, and an abutting conical surface is provided at the end of the one-way platform near the outer side of the sewage discharge pipe; a screw plug is screwed into the opening at the outer end of the sewage discharge pipe, and a sewage discharge hole is provided at the axis of the screw plug; a one-way ball and a first spring are provided between the one-way platform and the screw plug, wherein the one-way ball is located on the side near the one-way platform, and the first spring is located on the side near the screw plug; the two ends of the first spring abut against the one-way ball and the screw plug, respectively.

[0010] Furthermore, the fixing assembly also includes a waterproof motor, a positioning platform, and a second spring; the protective cylinder is a cylindrical structure with an open bottom, a drainage groove is provided on the side wall of the protective cylinder, and a wire-passing groove is provided on the top plate of the protective cylinder; a vertical limiting groove is provided on the inner wall of the protective cylinder; a positioning platform is slidably arranged inside the protective cylinder, and a limiting block is fixedly arranged on the outer surface of the positioning platform, the limiting block being slidably arranged inside the limiting groove; a second spring is provided between the upper end of the limiting block and the inner top surface of the limiting groove; a waterproof motor is fixedly arranged inside the positioning platform, the output shaft of the waterproof motor is vertically downward and a spiral drill is fixedly arranged thereon.

[0011] Furthermore, the lower end of the water-cooled water-filled motor body is fixedly connected to the connecting seat through a lower connecting assembly. The lower connecting assembly includes a first fixing platform, and multiple first fixing platforms are fixedly installed on the upper surface of the connecting seat. A lower fixing flange is fixedly installed on the lower end of the outer side of the water-cooled water-filled motor body. The lower end face of the lower fixing flange contacts the upper end face of the first fixing platform, and the fixing bolt passes through the lower fixing flange and is screwed to the first fixing platform.

[0012] Furthermore, the upper end of the water-cooled water-filled motor body is fixedly connected to the inner wall of the upper liquid storage tube via an upper connecting assembly; the upper connecting assembly includes a positioning row, a moving platform, a fixed shell, a limiting platform, a support groove, a worm gear, a worm, and a second fixed platform; a ring of positioning rows is fixedly arranged on the upper end of the inner wall of the upper liquid storage tube, and each positioning row is provided with multiple vertically arranged positioning holes; a circular moving platform is provided on the upper end of the inner wall of the upper liquid storage tube, and a ring of positioning rows is located outside the moving platform; a ring of docking platforms is fixedly arranged on the outside of the moving platform, and the docking platforms are engaged with the outer side of the corresponding positioning rows, and the docking platforms are connected to one of the fixed positions on the corresponding positioning rows. The moving platform is fixedly connected to the support grooves. A ring of support grooves is provided on the inner side of the moving platform, and a ring of fixed shells is fixedly provided on the outer side of the moving platform. The fixed shells correspond one-to-one with the support grooves. A second fixed platform is slidably provided inside each support groove. Two limiting platforms are fixedly provided inside the fixed shells. A worm gear is rotatably provided between the two limiting platforms. A vertical worm is rotatably provided inside the fixed shells. The worm meshes with the worm gear. The upper end of the worm extends to the outer side of the upper end of the fixed shell and is fixedly provided with a hand crank. A transmission screw is fixedly provided on the worm gear. The transmission screw is screwed to the end of the second fixed platform located inside the support groove.

[0013] Furthermore, an upper fixing flange is fixedly installed on the upper side of the outer surface of the water-cooled water-filled motor. The upper end face of all the second fixing platforms located outside the support groove is in contact with the lower end face of the upper fixing flange. The fixing bolts pass through the second fixing platforms and the upper fixing flange and are screwed with fixing nuts.

[0014] Furthermore, the impeller assembly includes an isolation sleeve, an open impeller, a semi-open impeller, and a closed impeller; a locking platform is fixedly installed on the lower end face of the connecting seat, the locking platform being located between a ring of connecting grooves and a ring of return holes; the upper opening of the isolation sleeve is sleeved onto the outside of the locking platform, multiple fixing screws pass through the isolation sleeve and the connecting seat, and fixing nuts are screwed onto both the upper and lower ends of the fixing screws; inside the isolation sleeve, from bottom to top, an open impeller, a semi-open impeller, and a closed impeller are arranged sequentially, the open impeller is fixedly sleeved onto the outside of the output shaft of the water-cooled water-filling motor, the semi-open impellers are fixedly installed back-to-back on the upper end of the open impeller, and the closed impeller is fixedly installed on the upper end of the semi-open impeller.

[0015] Furthermore, the liquid outlet assembly includes a second support platform, a sealing platform, a positioning rod, and a third spring; the second support platform is fixedly installed inside the opening at one end of the outer side of the liquid outlet pipe, and a liquid outlet hole is provided inside the opening at one end of the inner side of the liquid outlet pipe; a sealing platform is provided on the side of the second support platform near the upper liquid storage pipe, and a sealing cone surface is provided on the outer surface of the sealing platform; a positioning rod is fixedly installed at the center of the end face of the sealing platform near the second support platform, and the positioning rod is slidably inserted into the center of the second support platform; a third spring is sleeved on the outside of the positioning rod, and the two ends of the third spring are respectively connected to the sealing platform and the second support platform.

[0016] The beneficial effects of this invention compared to the prior art are as follows:

[0017] 1. This invention achieves stable installation and vibration damping protection of the self-priming pump in farmland and riverbed environments by setting up a fixing component. During the installation phase, the auger drill, second spring, and protective cylinder work together to allow for installation deviations even on uneven riverbed surfaces or in the presence of hard layers, eliminating the need for precise leveling. The second spring buffers the impact of hard materials on the waterproof motor, and the drainage channel of the protective cylinder promptly discharges silt to prevent accumulation and obstruction of fixation, significantly shortening the equipment installation and fixing time. During the fixing and limiting phase, the positioning holes of the positioning plate, in conjunction with the second fixing platform driven by the worm gear and worm, quickly position the water-cooled water-filled motor, which is then reinforced with bolts to achieve stable installation and prevent motor displacement due to vibration during operation. The height of the second fixing platform can be adjusted by the moving platform to accommodate water-cooled water-filled motors of different power specifications, eliminating the need for customized special fixing components.

[0018] 2. The device of this invention achieves efficient filtration, constant pressure backflow prevention, and safe sewage discharge of farmland irrigation water through the coordinated operation of the constant pressure filtration component, sewage discharge component, and liquid discharge component, ensuring stable delivery of irrigation water. The filter pipe at the feed end, in conjunction with the filter screen and the turbine-driven cleaning scraper, can automatically intercept large particulate impurities in the irrigation water. At the same time, the cleaning scraper rotates synchronously with the water flow to disperse impurities adsorbed on the surface of the filter screen, preventing filter screen blockage. The end cap of the constant pressure pipe, in conjunction with the automatic air inlet valve, automatically closes the end cap when the machine stops to prevent liquid in the pump chamber from flowing back to the water source. The automatic air inlet valve introduces air to break the siphon effect, preventing liquid loss in the pump chamber and the need for refilling upon restart. The sewage discharge component inside the sewage discharge pipe, in conjunction with the screw plug and the first spring, controls the opening and closing degree of the one-way ball to adjust the discharge speed and prevent excessive discharge pressure from causing injury to personnel or impact to equipment. The conical sealing platform inside the liquid discharge pipe, in conjunction with the third spring, can quickly form negative pressure during startup, ensuring stable output pressure of irrigation water.

[0019] 3. This invention reduces power consumption loss through multi-stage impeller assemblies, while facilitating subsequent component maintenance and cost control; the open impeller, semi-open impeller and closed impeller of the impeller assembly rotate coaxially. The semi-open impeller can counteract the axial force generated by the open impeller, reducing power loss, while the closed impeller assists in accelerating liquid flow and increasing head. Moreover, multiple impeller assemblies can be stacked according to the irrigation height requirements of farmland, without the need for customized special drive components. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the present invention after being partially cut at the sewage pipe;

[0023] Figure 3 This is a schematic diagram of the structure of the present invention after half-section at the protective cylinder;

[0024] Figure 4 This is a schematic diagram of the structure of the present invention after half-section at the second fixed platform;

[0025] Figure 5 This is a connection diagram of the filter tube, filter screen, rotating rod, and cleaning scraper;

[0026] Figure 6 This is an exploded view of the impeller assembly;

[0027] Figure 7 This is the invention Figure 2 Enlarged diagram of part A in the middle;

[0028] Figure 8 This is the invention Figure 2 Enlarged diagram of section B;

[0029] Figure 9 This is the invention Figure 3 Enlarged diagram of section C;

[0030] Figure 10 This is the invention Figure 2 Enlarged diagram of section D in the middle;

[0031] Figure 11 This is the invention Figure 4 Enlarged schematic diagram of section E in the middle.

[0032] Among them, 1 is the lower liquid storage pipe, 2 is the protective cylinder, 3 is the liquid inlet platform, 4 is the drain pipe, 5 is the connecting seat, 6 is the upper liquid storage pipe, 7 is the liquid outlet pipe, 8 is the hook, 9 is the liquid inlet device, 10 is the automatic exhaust valve, 11 is the liquid inlet pipe, 12 is the constant pressure pipe, 13 is the filter pipe, 14 is the automatic air inlet valve, 15 is the discharge platform, 16 is the end cap, 17 is the first support platform, 18 is the filter screen, 19 is the rotating rod, 20 is the cleaning scraper, 21 is the turbine, 22 is the one-way platform, 23 is the one-way ball, 24 is the first spring, 25 is the screw plug, 2 6 is a waterproof motor, 27 is a positioning platform, 28 is a spiral drill, 29 is a second spring, 30 is a water-cooled water-filled motor, 31 is a locking platform, 32 is an isolation sleeve, 33 is an open impeller, 34 is a semi-open impeller, 35 is a closed impeller, 36 is a second support platform, 37 is a sealing platform, 38 is a positioning rod, 39 is a third spring, 40 is a positioning row, 41 is a moving platform, 42 is a fixed shell, 43 is a limiting platform, 44 is a support groove, 45 is a worm gear, 46 is a worm, 47 is a second fixed platform, and 48 is a first fixed platform. Detailed Implementation

[0033] To make the technical problem to be solved, the technical solution, and the beneficial effects of the present invention clearer, the present invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0034] like Figure 1As shown in Figure 11, this invention provides a powerful self-priming pump for agriculture, comprising an upper liquid storage pipe 6 and a lower liquid storage pipe 1 distributed vertically. The upper liquid storage pipe 6 and the lower liquid storage pipe 1 are fixedly connected by a connecting seat 5. The connecting seat 5 is provided with a connecting groove and a return hole. A water-cooled water-filling motor 30 is fixedly installed inside the upper liquid storage pipe 6. The output shaft of the water-cooled water-filling motor 30 extends downward into the lower liquid storage pipe 1. Multiple sets of impeller assemblies are fixedly installed on the outside of the output shaft of the water-cooled water-filling motor 30. The lower liquid storage pipe 1 has two... The pump is equipped with an inlet pipe 11 and a drain pipe 4 on each side. A constant pressure filter assembly is installed at the inlet end of the inlet pipe 11, and a drain assembly is installed inside the drain pipe 4. Multiple protective cylinders 2 are fixedly installed at the lower end of the outer side of the lower storage pipe 1. Each protective cylinder 2 is equipped with a set of fixing components. The fixing components include a spiral drill 28, which is used to drill into the mud and sand to fix the self-priming pump. An outlet pipe 7 is fixedly installed on one side of the upper storage pipe 6, and an outlet assembly is installed inside the outlet pipe 7.

[0035] The upper liquid storage pipe 6 is a cylindrical structure with openings at both the top and bottom. A removable top cover is fixedly installed at the upper opening of the upper liquid storage pipe 6. A flange is fixedly installed on the outside of the lower opening of the upper liquid storage pipe 6. The lower liquid storage pipe 1 is a cylindrical structure with an opening at the top. A flange is fixedly installed on the outside of the upper opening of the lower liquid storage pipe 1. The connecting seat 5 is a horizontally arranged annular plate structure, which is located between the lower opening of the upper liquid storage pipe 6 and the upper opening of the lower liquid storage pipe 1. Multiple fixing bolts pass sequentially through the flange on the outside of the lower opening of the upper liquid storage pipe 6, the connecting seat 5, and the flange on the outside of the upper opening of the lower liquid storage pipe 1, and are then screwed with fixing nuts, thereby fixing the upper liquid storage pipe 6, the connecting seat 5, and the lower liquid storage pipe 1 together.

[0036] A hook 8, an automatic air vent valve 10, and a liquid inlet 9 are fixedly installed on the top of the top cover. During the operation of the self-priming pump, the air inside the upper liquid storage pipe 6 and the lower liquid storage pipe 1 is discharged to the outside through the automatic air vent valve 10. In the initial stage of operation, water is injected into the self-priming pump through the liquid inlet 9. The self-priming pump is moved by hanging the hook 8.

[0037] A ring of through-holes is provided at the inner edge of the connecting seat 5, and a ring of through-groove grooves is provided at the outer edge of the connecting seat 5. The output shaft of the water-cooled water-filling motor 30 passes downward through the central hole of the connecting seat 5, and the output shaft of the water-cooled water-filling motor 30 is rotatably connected to the central hole of the connecting seat 5 through a bearing.

[0038] A liquid inlet platform 3 is fixedly installed at the lower end of one side of the lower liquid storage pipe 1, and one end of the inner side of the liquid inlet platform 3 is connected to the inside of the lower liquid storage pipe 1. The outlet end of the liquid inlet pipe 11 is fixedly connected to the outer end of the liquid inlet platform 3 through a connecting flange, and the height of the inlet end of the liquid inlet pipe 11 is higher than the height of the outlet end of the liquid inlet pipe 11.

[0039] The constant pressure filtration assembly includes a constant pressure pipe 12, a connecting pipe, a filter pipe 13, an automatic air intake valve 14, a platform 15, an end cap 16, a first support platform 17, a filter screen 18, a rotating rod 19, a cleaning scraper 20, and a turbine 21.

[0040] A constant pressure pipe 12, a connecting pipe, and a filter pipe 13 are sequentially fixedly installed on the outer side of the inlet end of the liquid inlet pipe 11. These pipes are connected sequentially via mating flanges and are interconnected. An automatic air intake valve 14 is fixedly installed on the side wall of the constant pressure pipe 12 and is internally connected to it. A first support platform 17 is fixedly installed on the inner side of the filter pipe 13 near the connecting pipe, and a filter screen 18 is fixedly installed on the end of the filter pipe 13 away from the connecting pipe. A circular array of through holes is provided on the first support platform 17. A rotating rod 19 is rotatably installed at the center of the end face of the first support platform 17 away from the connecting pipe. The rotating rod 19 is located on the axis of the filter pipe 13, and its end away from the first support platform 17 extends to the outside of the filter screen 18. The rotating rod 19 and the filter screen 18 are rotatably connected. A turbine 21 is fixedly installed on the outside of the rotating rod 19 located between the first support platform 17 and the filter screen 18. A ring of cleaning scrapers 20 arranged in a circular array is fixedly installed on the outside of the rotating rod 19 located outside the filter screen 18. The cleaning scrapers 20 maintain sliding contact with the outer surface of the filter screen 18.

[0041] A platform 15 is fixedly installed inside the opening at the end of the constant pressure pipe 12 away from the inlet pipe 11. The platform 15 is a cylindrical structure with openings at both ends. The opening at the end of the platform 15 away from the inlet pipe 11 is fixedly connected to the inside of the opening at the end of the constant pressure pipe 12 away from the inlet pipe 11 through a connecting flange. The opening at the end of the platform 15 near the inlet pipe 11 is set as an inclined structure, with the lower side of the opening at the end of the platform 15 near the inlet pipe 11 inclined towards the inlet pipe 11. An end cap 16 is rotatably installed on the outer side of the opening at the end of the platform 15 near the inlet pipe 11. The upper end of the end cap 16 is hinged to the upper side of the opening at the end of the platform 15 near the inlet pipe 11. When the end cap 16 is not subjected to external force, the end cap 16 fits against the opening at the end of the platform 15 near the inlet pipe 11 under its own weight, thereby keeping the opening at the end of the platform 15 near the inlet pipe 11 closed.

[0042] When the self-priming pump starts running, the water-cooled charging motor 30 drives the impeller assembly to rotate, generating negative pressure inside the lower storage pipe 1. Negative pressure is also generated inside the inlet pipe 11 and the constant pressure pipe 12. Under the action of the negative pressure inside the inlet pipe 11, the end cap 16 begins to rotate upward, and the opening at the end of the platform 15 near the inlet pipe 11 opens, allowing water from the outside to be drawn into the filter pipe 13. The incoming water first passes through the filter screen 18, which intercepts large particles of impurities. The incoming water flow impacts the turbine 21, causing it to rotate. The turbine 21 drives the rotating rod 19 to rotate synchronously, which in turn drives a ring of cleaning scrapers 20 to rotate synchronously. The rotating cleaning scrapers 20 disperse the impurities adsorbed on the outer surface of the filter screen 18, preventing the filter screen 18 from clogging. The water flow filtered by the filter screen 18 then passes through the connecting pipe, the constant pressure pipe 12, and the inlet pipe 11 before entering the lower storage pipe 1.

[0043] When the self-priming pump stops, the lower storage pipe 1 maintains normal pressure, and the inlet pipe 11 also maintains normal pressure. Under its own weight, the end cap 16 rotates downwards and re-closes the opening of the platform 15 near the inlet pipe 11, preventing liquid from being discharged from the self-priming pump through the inlet pipe 11 and ensuring liquid remains inside the pump. Simultaneously, the automatic air inlet valve 14 remains open, providing external air pressure to the constant pressure pipe 12 to break the siphon effect caused by shutdown, thus preventing liquid loss from the pump chamber. Therefore, priming is not required for the next use.

[0044] As a consumable part, the filter screen 18 is recommended to be made of stainless steel. In special cases, it can also be made of a mixture of acid-resistant or alkali-resistant metals.

[0045] The sewage discharge assembly includes a one-way platform 22, a one-way ball 23, a first spring 24, and a screw plug 25.

[0046] A circular one-way platform 22 is fixedly installed on the inner wall of one end of the drain pipe 4. A tapered abutment surface, wider on the outside and narrower on the inside, is provided at the end of the one-way platform 22 near the outside of the drain pipe 4. A plug 25 is screwed into the opening at the outside end of the drain pipe 4. A drain hole, communicating internally and externally, is provided along the axis of the plug 25. A one-way ball 23 and a first spring 24 are positioned between the one-way platform 22 and the plug 25. The one-way ball 23 is located near the one-way platform 22, and the first spring 24 is located near the plug 25. One end of the first spring 24 abuts against the one-way ball 23, and the other end abuts against the inner surface of the plug 25.

[0047] When the liquid pressure inside the lower storage tube 1 is less than the elastic force of the first spring 24, under the action of the elastic force of the first spring 24, the one-way ball 23 abuts against the abutting cone surface of the one-way platform 22, so that the one-way platform 22 is closed, and the liquid inside the lower storage tube 1 cannot flow out to the outside of the drain pipe 4 through the one-way platform 22, thereby keeping the drain pipe 4 closed.

[0048] When the liquid pressure inside the lower reservoir 1 is greater than the elastic force of the first spring 24, the liquid inside the lower reservoir 1 exerts a pressure on the one-way ball 23 that is greater than the elastic force of the first spring 24, causing the one-way ball 23 to be pushed away from the one-way stage 22, the first spring 24 to be compressed, and the liquid inside the lower reservoir 1 passes through the one-way stage 22 and enters the drain pipe 4, and finally is discharged outward through the drain hole at the axis of the screw plug 25.

[0049] By rotating the screw plug 25, the distance between the one-way ball 23 and the screw plug 25 can be adjusted, thereby adjusting the elastic force of the first spring 24. In this way, the liquid inside the lower liquid storage tube 1 can be discharged under different pressures.

[0050] When drainage is required, slowly rotate the screw plug 25 to move it outward. This gradually reduces the elastic force of the first spring 24, causing the one-way ball 23 to be gradually pushed away from the one-way stage 22. In this way, the liquid inside the lower liquid storage tube 1 can slowly pass through the one-way stage 22 and be slowly discharged through the drainage hole on the screw plug 25, so as not to cause excessive pressure and injury to personnel due to sudden drainage.

[0051] The fixing assembly also includes a waterproof motor 26, a positioning platform 27, and a second spring 29.

[0052] The protective cylinder 2 is a cylindrical structure with an open lower end, the lower opening of which is flush with the lower end face of the lower liquid storage pipe 1. A drain groove is provided on the lower end of the side wall of the protective cylinder 2 away from the lower liquid storage pipe 1, and a wire-passing groove is provided on the top plate of the protective cylinder 2. A vertical limiting groove is provided on the inner wall of the protective cylinder 2. An annular positioning platform 27 is slidably disposed vertically inside the protective cylinder 2, and a limiting block is fixedly disposed on the outer surface of the positioning platform 27, slidingly disposed inside the limiting groove. A vertical second spring 29 is provided at the upper end of the limiting block, and the upper end of the second spring 29 is connected to the top surface inside the limiting groove. A waterproof motor 26 is fixedly disposed inside the positioning platform 27, the output shaft of the waterproof motor 26 is vertically downward, and a spiral drill 28 is fixedly disposed thereon. The axis of the spiral drill 28 remains vertical, and the outer diameter of the spiral drill 28 decreases sequentially from top to bottom.

[0053] The materials used for both the auger 28 and the second spring 29 are PH13-8Mo (UNSS13800).

[0054] The lower end of the water-cooled water-filling motor 30 is fixedly connected to the connecting seat 5 via the lower connecting component, and the upper end of the water-cooled water-filling motor 30 is fixedly connected to the inner wall of the upper liquid storage pipe 6 via the upper connecting component.

[0055] The lower connecting assembly includes a first fixing platform 48. Multiple first fixing platforms 48 are fixedly disposed on the upper end face of the connecting seat 5, and each first fixing platform 48 has a first fixing hole on its upper end face. A lower fixing flange is fixedly disposed on the lower end of the outer side of the water-cooled water-filling motor 30. Multiple first mounting holes are disposed on the lower fixing flange, and the first mounting holes correspond one-to-one with the first fixing holes. The lower end face of the lower fixing flange contacts the upper end face of the first fixing platform 48. The fixing bolt passes through the first mounting hole and is screwed into the corresponding first fixing hole, thereby fixing the lower end of the water-cooled water-filling motor 30 to the connecting seat 5.

[0056] The upper connecting assembly includes a positioning row 40, a moving platform 41, a fixed shell 42, a limiting platform 43, a support groove 44, a worm gear 45, a worm 46, and a second fixed platform 47.

[0057] A vertical positioning array 40 is fixedly installed on the upper inner wall of the upper liquid storage tube 6. This array of positioning arrays 40 is arranged in a circular pattern around the axis of the upper liquid storage tube 6, and each positioning array 40 has multiple positioning holes equidistantly arranged along the vertical direction. A circular moving platform 41 is installed at the upper inner end of the upper liquid storage tube 6, and the positioning array 40 is located outside the moving platform 41. A circular array of docking platforms is fixedly installed outside the moving platform 41, with each docking platform corresponding to one of the positioning arrays 40. The docking platform is engaged with the outer side of its corresponding positioning array 40, and each docking platform has a docking hole aligned with one of the positioning holes on the corresponding positioning array 40. A fixing bolt passes through the aligned positioning hole and docking hole and is screwed with a fixing nut, thereby fixing the positioning array 40 and the moving platform 41 together, and vice versa. By aligning and fixing the docking platforms with the different positioning holes on the positioning arrays 40, the fixed height of the docking platforms can be adjusted.

[0058] A circular array of support grooves 44 is arranged on the inner side of the moving platform 41, and a circular array of fixing shells 42 is fixedly arranged on the outer side of the moving platform 41. The fixing shells 42 correspond one-to-one with the support grooves 44, and are located outside the corresponding support grooves 44. A second fixing platform 47 is slidably arranged inside each support groove 44, and a second fixing hole is provided at the end of the second fixing platform 47 located outside the support groove 44. The fixing shell 42 is hollow, and a connecting hole is provided on the partition between the fixing shell 42 and the support groove 44. Two cylindrical limiting platforms 43 are fixedly arranged inside the fixing shell 42, and a worm gear 45 is rotatably arranged between the two limiting platforms 43. The axis of the worm gear 45 is arranged along the radial direction of the moving platform 41. A vertical worm 46 is rotatably arranged inside the fixing shell 42, and the worm 46 meshes with the worm gear 45. The upper end of the worm gear 46 extends to the outer side of the upper end of the fixed housing 42. A hand crank is fixedly installed at the upper end of the worm gear 46, and the worm gear 46 can be rotated by rotating the hand crank. A transmission screw is fixedly installed at the end of the worm wheel 45 near the axis of the moving table 41. The axis of the transmission screw coincides with the axis of the worm wheel 45. The transmission screw passes through the connecting hole on the partition between the fixed housing 42 and the support groove 44 and is screwed to the end of the second fixed table 47 located inside the support groove 44.

[0059] An upper fixing flange is fixedly installed on the upper part of the outer surface of the water-cooled water-filling motor 30, and a ring of second mounting holes is provided on the upper fixing flange. The upper end face of all the second fixing platforms 47 located outside the support groove 44 is in contact with the lower end face of the upper fixing flange. The ring of second mounting holes on the upper fixing flange corresponds one-to-one with the second fixing holes on all the second fixing platforms 47. The fixing bolt passes through the corresponding second fixing hole and the second mounting hole and is screwed with a fixing nut, thereby fixing the upper fixing flange to all the second fixing platforms 47, and then fixing the upper end of the water-cooled water-filling motor 30 to the upper end of the upper liquid storage pipe 6.

[0060] The impeller assembly includes an isolation sleeve 32, an open impeller 33, a semi-open impeller 34, and a closed impeller 35.

[0061] A locking platform 31 is fixedly provided on the lower end face of the connecting seat 5. The locking platform 31 is a cylindrical structure with openings at both the upper and lower ends. The locking platform 31 is located between a ring of connecting grooves and a ring of return holes.

[0062] The isolation sleeve 32 is a cylindrical structure with openings at both the top and bottom. The upper opening of the isolation sleeve 32 fits onto the outside of the locking platform 31, and the upper end of the isolation sleeve 32 contacts the lower end of the connecting seat 5. The inner side of the upper opening of the isolation sleeve 32 contacts the outer side of the locking platform 31, which supports the isolation sleeve 32. A ring of vertically penetrating third fixing holes is provided on the isolation sleeve 32, and a ring of vertically penetrating third mounting holes is provided on the connecting seat 5. The ring of third fixing holes on the isolation sleeve 32 corresponds one-to-one with the ring of third mounting holes on the connecting seat 5. The fixing screw passes through the corresponding third fixing hole and third mounting hole, and fixing nuts are screwed onto both the upper and lower ends of the fixing screw, thereby fixing the isolation sleeve 32 and the connecting seat 5.

[0063] Inside the isolation sleeve 32, from bottom to top, are arranged an open impeller 33, a semi-open impeller 34, and a closed impeller 35. The open impeller 33 is fixedly sleeved on the outside of the output shaft of the water-cooled water-filling motor 30. The semi-open impeller 34 is fixedly mounted back-to-back on the upper end of the open impeller 33, and the closed impeller 35 is fixedly mounted on the upper end of the semi-open impeller 34. When the output shaft of the water-cooled water-filling motor 30 rotates, it drives the open impeller 33, the semi-open impeller 34, and the closed impeller 35 to rotate inside the isolation sleeve 32.

[0064] One or more impeller assemblies can be installed on the output shaft of the water-cooled water-filling motor 30. When multiple impeller assemblies need to be installed, the isolation sleeves 32 of all the impeller assemblies are aligned one by one, and the third fixing holes on all the isolation sleeves 32 correspond. A longer fixing screw is selected and passed through the corresponding third fixing holes on all the isolation sleeves 32 and the third mounting holes on the connecting seat 5. Fixing nuts are screwed on both the upper and lower ends of the fixing screw, thereby fixing all the isolation sleeves 32 to the connecting seat 5, thus realizing the connection of multiple impeller assemblies to the output shaft of the water-cooled water-filling motor 30.

[0065] The liquid discharge assembly includes a second support platform 36, a sealing platform 37, a positioning rod 38, and a third spring 39.

[0066] A second support platform 36 is fixedly installed inside the opening at one end of the outer side of the outlet pipe 7, and a ring of through holes is provided on the second support platform 36. An outlet hole is provided inside the opening at one end of the inner side of the outlet pipe 7. A sealing platform 37 is provided on the side of the second support platform 36 near the upper storage pipe 6, and a sealing cone surface with a coarser outer surface and a thinner inner surface is provided on the outer surface of the sealing platform 37. A positioning rod 38 is fixedly installed at the center of the end face of the sealing platform 37 near the second support platform 36. The axis of the positioning rod 38 is set along the radial direction of the upper storage pipe 6, and the positioning rod 38 is slidably inserted into the center of the second support platform 36. A third spring 39 is sleeved on the outside of the positioning rod 38. One end of the third spring 39 is connected to the sealing platform 37, and the other end of the third spring 39 is connected to the second support platform 36.

[0067] When the liquid pressure inside the upper storage tube 6 is less than the elastic force of the third spring 39, the sealing cone surface on the outside of the sealing platform 37 abuts against the liquid outlet under the elastic force of the third spring 39, thereby blocking the liquid outlet and preventing the liquid inside the upper storage tube 6 from being discharged out through the liquid outlet tube 7.

[0068] When the liquid pressure inside the upper liquid storage tube 6 is greater than the elastic force of the third spring 39, the liquid inside the upper liquid storage tube 6 will push the sealing platform 37 away from the liquid outlet, the third spring 39 will be compressed, and the liquid inside the upper liquid storage tube 6 will be discharged outward from the liquid outlet tube 7.

[0069] This invention also proposes a method for using a powerful self-priming pump for agriculture, comprising the following steps:

[0070] The first step involves using hoisting equipment to move the lower liquid storage pipe 1 to the water source for operation. After ensuring the lower liquid storage pipe 1 is placed stably, the equipment is inspected. First, the connections between the liquid inlet platform 3 and the liquid inlet pipe 11, the liquid inlet pipe 11 and the constant pressure pipe 12, the constant pressure pipe 12 and the connecting pipe, and the connecting pipe and the filter pipe 13 are checked for leaks during liquid inlet. Next, the status of the automatic air inlet valve 14 is checked for blockages. Then, the drain pipe 4 is checked, ensuring a stable connection between the screw plug 25 and the drain pipe 4, allowing the one-way ball 23 to fit tightly against the one-way platform 22 under the elastic force of the first spring 24, ensuring a seal. Finally, the external power cable is connected to the waterproof motor 26 inside the protective cylinder 2 through the cable tray at the top of the protective cylinder 2, ensuring the external power cable is undamaged.

[0071] The second step involves using external hoisting tools to lift the water-cooled motor 30 onto the upper part of the connecting seat 5, ensuring that the output shaft of the water-cooled motor 30 passes downward through the center hole of the connecting seat 5. This ensures that the lower end of the lower fixing flange on the water-cooled motor 30 is flush with the upper surface of the first fixing platform 48, and that the first mounting hole on the lower fixing flange aligns with the first fixing hole on the first fixing platform 48. The lower fixing flange is then fixedly connected to the first fixing platform 48 using fixing bolts. Next, a bearing is installed between the output shaft of the water-cooled motor 30 and the center hole of the connecting seat 5. Then, according to the on-site head requirements, one or more head assembly components are installed on the output shaft of the water-cooled motor 30. Finally, the connection between the isolation sleeve 32 and the locking platform 31 is checked.

[0072] Third, the water-cooled water-filling motor 30, connecting seat 5, and impeller assembly, which are connected as a whole, are lifted up so that the impeller assembly enters the lower liquid storage pipe 1, and the connecting seat 5 is aligned with the upper opening of the lower liquid storage pipe 1. Then, the upper liquid storage pipe 6, with its top cover removed, is lifted up so that it covers the outside of the water-cooled water-filling motor 30, and the lower opening of the upper liquid storage pipe 6 is aligned with the connecting seat 5. Then, the upper liquid storage pipe 6, connecting seat 5, and lower liquid storage pipe 1 are fixedly connected using fixing bolts and fixing nuts. Then, the moving platform 41 is placed inside the upper opening of the upper liquid storage pipe 6, and after the moving platform 41 is adjusted to a suitable height, it is fixedly connected to a ring of positioning plates 40. Then, rotate the hand crank in sequence. The hand crank drives the worm gear 46 to rotate in the fixed housing 42. The worm gear 46 drives the worm wheel 45 to rotate, and the worm wheel 45 drives the transmission screw to rotate. Since the transmission screw is screwed to the second fixed platform 47, the second fixed platform 47 slides outward of the support groove 44 until the upper end face of the second fixed platform 47 is in contact with the lower end face of the upper fixed flange on the outside of the water-cooled water-filling motor 30. The second fixing hole on the second fixed platform 47 corresponds to the second mounting hole on the upper fixed flange. The corresponding second mounting hole and the second fixing hole are fixedly connected by fixing bolts and fixing nuts. After the upper fixed flange and all the second fixed platforms 47 are fixed, fix the top cover to the upper opening of the upper liquid storage pipe 6. Then fix the top cover to the upper opening of the upper liquid storage pipe 6. Then install the external armored pipes at the automatic air intake valve 14 and the automatic air exhaust valve 10 respectively, ensuring that when the self-priming pump is placed in the riverbed, the port of the external armored pipe is higher than the horizontal plane.

[0073] Fourth, after the inspection is completed, the staff opens the inlet 9 and fills the upper and lower storage pipes 6 and 1 with clean water. The water level should cover the connecting groove on the connector 5, ensuring that all impeller components are submerged in the water. If the impeller components are exposed, they cannot generate effective centrifugal force and negative pressure. After the water filling is complete, the inlet 9 is closed, and the self-priming pump is hoisted and placed on the riverbed surface to be pumped using hoisting equipment. Since the riverbed is mostly composed of flexible silt, the self-priming pump compresses the riverbed under gravity. The auger 28 will be compressed upward by the flexible silt, causing the second spring 29 to be pushed upward, thus adjusting the entire fixed assembly to a semi-raised state. Then, the waterproof motor 26 is started. The output shaft of the waterproof motor 26 drives the auger 28 to rotate at high speed, drilling into the riverbed soil. Due to the downward elastic force of the second spring 29 on the positioning platform 27, the waterproof motor 26 maintains a downward driving force, ensuring that the auger 28 drills to a sufficient depth. When the auger 28 encounters hard objects such as rocks during drilling, the second spring 29 can buffer the impact force of the hard objects on the auger 28, preventing the waterproof motor 26 from being overloaded and damaged. The mud and sand generated by the auger 28 during drilling will be discharged outward through the drainage channel on the side wall of the protective cylinder 2, preventing the mud and sand from obstructing the downward sliding of the positioning platform 27 inside the protective cylinder 2. Finally, the auger 28 is stably drilled into the riverbed, completing the fixation of the self-priming pump.

[0074] Fifth, start the water-cooled filling motor 30. The water-cooled filling motor 30 drives the open impeller 33, the semi-open impeller 34, and the closed impeller 35 to rotate synchronously. When the open impeller 33 rotates, the liquid in the lower storage pipe 1 will be thrown to the outside, and a negative pressure will be formed in the central area. At the same time, the semi-open impeller 34 rotates synchronously, which will counteract the axial force generated by the open impeller 33 and prevent the impeller assembly from breaking due to excessive axial force. Meanwhile, the closed impeller 35 will help accelerate the liquid flow and provide power for subsequent liquid discharge. The negative pressure of the lower storage pipe 1 is transmitted to the filter pipe 13 through the liquid inlet platform 3, the liquid inlet pipe 11, the constant pressure pipe 12, and the connecting pipe, drawing external water into the filter pipe 13. The filter screen 18 filters the water flowing into the filter tube 13, intercepting large particles of impurities. Simultaneously, the water flow impacts the turbine 21 between the filter screen 18 and the first support platform 17, causing the turbine 21 to rotate. The turbine 21, through the rotating rod 19, drives the cleaning scraper 20 to rotate synchronously. The cleaning scraper 20 disperses impurities adsorbed on the surface of the filter screen 18, preventing clogging. The filtered water flows into the constant pressure pipe 12. Under negative pressure, the end cap 16 rotates upwards, and the water flows through the inlet pipe 11 into the inlet platform 3, finally flowing into the lower storage pipe 1. At this time, the gas-liquid mixture in the lower liquid storage pipe 1, under the action of centrifugal force from the rotation of the impeller assembly, enters the upper liquid storage pipe 6 through the connecting groove on the outside of the connecting seat 5. Since the volume of the upper liquid storage pipe 6 is larger than that of the connecting groove, the flow rate of the gas-liquid mixture drops sharply after entering the upper liquid storage pipe 6. The gas-liquid mixture is separated by the difference in gravity. At this time, the gas floats up and is discharged from the pump through the automatic exhaust valve 10 on the top cover side, while the liquid sinks and flows back into the lower liquid storage pipe 1 through the return hole on the connecting seat 5. Then it mixes with the newly drawn-in air again, forming a cycle of "gas-liquid separation - liquid return - remixing" until the air in the inlet pipe 11 and constant pressure pipe 12 and other pipes is completely exhausted and the pipes are filled with liquid. That is, the self-priming process is completed, and the equipment begins to enter the normal continuous water supply state. As liquid continues to accumulate in the storage pipe 6, the pressure gradually increases, pushing the sealing platform 37 in the outlet pipe 7. The sealing platform 37 drives the positioning rod 38 to slide inside the second support platform 36, squeezing the third spring 39 between the second support platform 36 and the sealing platform 37. When the sealing platform 37 disengages from the outlet hole of the outlet pipe 7, the high-pressure liquid is discharged from the outlet pipe 7 through the outlet hole, providing water for farmland irrigation.

[0075] Step 6: When the water-cooled charging motor 30 is turned off, the impeller assembly stops rotating, the pressure in the upper liquid storage pipe 6 drops sharply, the third spring 39 resets, and the sealing platform 37 reseals the outlet hole to prevent external air from being drawn back into the upper liquid storage pipe 6. The lower liquid storage pipe 1 maintains normal pressure, and the inlet pipe 11 also maintains normal pressure. Thus, under its own weight, the end cap 16 re-closes the opening of the outlet platform 15 near the inlet pipe 11, preventing liquid inside the self-priming pump from being discharged out through the inlet pipe 11, thereby ensuring that liquid remains inside the self-priming pump. At the same time, the automatic air intake valve 14 remains open, providing external air pressure to the constant pressure pipe 12 to break the siphon effect caused by shutdown, thereby preventing liquid loss from the pump chamber. This way, the equipment does not need to be refilled before the next use. If the self-priming pump needs to be moved, start the waterproof motor 26 to reverse, which will drive the auger drill 28 out of the riverbed. The second spring 29 will reset and pull the positioning platform 27 upward. The auger drill 28 will then be retracted into the protective cylinder 2. The equipment can then be moved by lifting the hook 8.

[0076] Step 7: When the equipment needs to be stopped for cleaning or to drain residual liquid after a certain period of use, the entire equipment is lifted and placed in a designated position using external hoisting equipment. The operator turns the screw plug 25 on the outside of the drain pipe 4. The screw plug 25 moves outward along the inner cavity of the drain pipe 4. The first spring 24 reduces the pressure on the one-way ball 23, pushing the one-way ball 23 away from the one-way platform 22. The residual liquid in the lower liquid storage pipe 1 and the upper liquid storage pipe 6 is discharged through the drain pipe 4. The operator can adjust the spring force of the first spring 24 by controlling the turning angle of the screw plug 25, thereby controlling the drainage speed and avoiding excessive drainage pressure that could cause injury to personnel or impact to the equipment. Then, the entire equipment is disassembled, repaired, and replaced in conjunction with external hoisting equipment.

[0077] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A powerful self-priming pump for agricultural use, characterized in that: The system includes an upper liquid storage pipe (6) and a lower liquid storage pipe (1) distributed vertically. The upper liquid storage pipe (6) and the lower liquid storage pipe (1) are fixedly connected by a connecting seat (5). A connecting groove and a return hole are provided on the connecting seat (5). A water-cooled water-filling motor (30) is fixedly installed inside the upper liquid storage pipe (6). The output shaft of the water-cooled water-filling motor (30) extends downward into the lower liquid storage pipe (1). Multiple sets of impeller assemblies are fixedly installed on the outside of the output shaft of the water-cooled water-filling motor (30). Inlet pipes (1) are respectively provided on both sides of the lower liquid storage pipe (1). 1) and drain pipe (4), a constant pressure filter assembly is provided at the inlet end of the liquid inlet pipe (11), and a drain assembly is provided inside the drain pipe (4); multiple protective cylinders (2) are fixedly provided at the lower outer end of the lower liquid storage pipe (1), and a set of fixing components is provided inside each protective cylinder (2), the fixing components include a spiral drill (28), the spiral drill (28) is drilled into the mud and sand to fix the self-priming pump; a liquid outlet pipe (7) is fixedly provided on one side of the upper liquid storage pipe (6), and a liquid outlet assembly is provided inside the liquid outlet pipe (7); The upper end of the water-cooled water-filling motor (30) is fixedly connected to the inner wall of the upper liquid storage tube (6) through an upper connecting assembly; the upper connecting assembly includes a positioning row (40), a moving platform (41), a fixed shell (42), a limiting platform (43), a support groove (44), a worm gear (45), a worm (46), and a second fixed platform (47); a ring of positioning rows (40) is fixedly provided on the upper end of the inner wall of the upper liquid storage tube (6), and each positioning row (40) is provided with multiple vertically arranged positioning holes; a circular moving platform (41) is provided on the upper end of the interior of the upper liquid storage tube (6), and a ring of positioning rows (40) is located outside the moving platform (41); a ring of docking platforms is fixedly provided on the outside of the moving platform (41), and the docking platforms are snapped onto the outside of the corresponding positioning rows (40), and the docking platforms are fixedly connected to one of the positioning holes on the corresponding positioning rows (40). A ring of support grooves (44) is provided on the inner side of the moving platform (41), and a ring of fixed shells (42) is fixedly provided on the outer side of the moving platform (41). The fixed shells (42) correspond one-to-one with the support grooves (44). A second fixed platform (47) is slidably provided inside each support groove (44). Two limiting platforms (43) are fixedly provided inside the fixed shells (42). A worm wheel (45) is rotatably provided between the two limiting platforms (43). A vertical worm (46) is rotatably provided inside the fixed shells (42). The worm (46) meshes with the worm wheel (45). The upper end of the worm (46) extends to the outer side of the upper end of the fixed shell (42) and is fixedly provided with a hand crank. A transmission screw is fixedly provided on the worm wheel (45). The transmission screw is screwed to one end of the second fixed platform (47) located inside the support groove (44). An upper fixing flange is fixedly installed on the upper side of the outer surface of the water-cooled water-filled motor (30). The upper end face of all the second fixing platforms (47) located outside the support groove (44) is in contact with the lower end face of the upper fixing flange. The fixing bolt passes through the second fixing platform (47) and is screwed with a fixing nut after connecting to the upper fixing flange.

2. The agricultural high-power self-priming pump according to claim 1, characterized in that: A detachable top cover is fixedly installed at the upper opening of the upper liquid storage pipe (6). A hook (8), an automatic exhaust valve (10), and an inlet device (9) are fixedly installed on the upper end of the top cover. A connecting seat (5) is located between the lower opening of the upper liquid storage pipe (6) and the upper opening of the lower liquid storage pipe (1). A ring of reflux holes is provided at the inner edge of the connecting seat (5), and a ring of connecting grooves is provided at the outer edge of the connecting seat (5). The output shaft of the water-cooled water-filling motor (30) passes downward through the center hole of the connecting seat (5).

3. The agricultural high-power self-priming pump according to claim 1, characterized in that: The constant pressure filtration assembly includes a constant pressure pipe (12), a connecting pipe, a filter pipe (13), an automatic air inlet valve (14), a platform (15), an end cap (16), a first support platform (17), a filter screen (18), a rotating rod (19), a cleaning scraper (20), and a turbine (21). The constant pressure pipe (12), the connecting pipe, and the filter pipe (13) are fixedly installed in sequence on the outside of the inlet end of the liquid inlet pipe (11). The automatic air inlet valve (14) is fixedly installed on the side wall of the constant pressure pipe (12). The first support platform (17) is fixedly installed on the inside of the end of the filter pipe (13) near the connecting pipe. The filter screen (18) is fixedly installed on the end of the filter pipe (13) away from the connecting pipe. The filter screen (18) is rotatably mounted on the first support platform (17). The end of the rotating rod (19) away from the first support platform (17) extends to the outside of the filter screen (18). A turbine (21) is fixedly mounted on the outside of the rotating rod (19) located between the first support platform (17) and the filter screen (18). A cleaning scraper (20) is fixedly mounted on the outside of the rotating rod (19) located outside the filter screen (18). A platform (15) is fixedly mounted on the inside of the opening at the end of the constant pressure pipe (12) away from the liquid inlet pipe (11). The opening at the end of the platform (15) near the liquid inlet pipe (11) is tilted and rotatably mounted with an end cap (16).

4. The agricultural high-power self-priming pump according to claim 1, characterized in that: The sewage discharge assembly includes a one-way platform (22), a one-way ball (23), a first spring (24), and a screw plug (25). The one-way platform (22) is fixedly installed on the inner wall of one end of the sewage pipe (4), and an abutting cone surface is provided at one end of the one-way platform (22) near the outside of the sewage pipe (4). A screw plug (25) is screwed into the opening at one end of the outside of the sewage pipe (4), and a sewage discharge hole is provided at the axis of the screw plug (25). The one-way ball (23) and the first spring (24) are provided between the one-way platform (22) and the screw plug (25), wherein the one-way ball (23) is located on the side near the one-way platform (22), and the first spring (24) is located on the side near the screw plug (25). The two ends of the first spring (24) abut against the one-way ball (23) and the screw plug (25) respectively.

5. The agricultural high-power self-priming pump according to claim 1, characterized in that: The fixing assembly also includes a waterproof motor (26), a positioning platform (27), and a second spring (29); the protective cylinder (2) is a cylindrical structure with an open bottom, a drain groove is provided on the side wall of the protective cylinder (2), and a wire groove is provided on the top plate of the protective cylinder (2); a vertical limiting groove is provided on the inner wall of the protective cylinder (2); a positioning platform (27) is slidably arranged inside the protective cylinder (2), a limiting block is fixedly arranged on the outer surface of the positioning platform (27), and the limiting block is slidably arranged inside the limiting groove; a second spring (29) is provided between the upper end of the limiting block and the top surface inside the limiting groove; a waterproof motor (26) is fixedly arranged inside the positioning platform (27), the output shaft of the waterproof motor (26) is vertically downward and a spiral drill (28) is fixedly arranged thereon.

6. The agricultural high-power self-priming pump according to claim 1, characterized in that: The lower end of the body of the water-cooled water-filling motor (30) is fixedly connected to the connecting seat (5) through the lower connecting component. The lower connecting component includes a first fixing platform (48). Multiple first fixing platforms (48) are fixedly arranged on the upper surface of the connecting seat (5). A lower fixing flange is fixedly arranged on the lower end of the outer side of the body of the water-cooled water-filling motor (30). The lower end of the lower fixing flange is in contact with the upper end of the first fixing platform (48). The fixing bolt passes through the lower fixing flange and is screwed to the first fixing platform (48).

7. The agricultural high-power self-priming pump according to claim 2, characterized in that: The impeller assembly includes an isolation sleeve (32), an open impeller (33), a semi-open impeller (34), and a closed impeller (35). A locking platform (31) is fixedly installed on the lower end face of the connecting seat (5). The locking platform (31) is located between a ring of connecting grooves and a ring of return holes. The upper opening of the isolation sleeve (32) is sleeved on the outside of the locking platform (31). Multiple fixing screws pass through the isolation sleeve (32) and the connecting seat (5). Fixing nuts are screwed on both the upper and lower ends of the fixing screws. Inside the isolation sleeve (32), from bottom to top, the open impeller (33), the semi-open impeller (34), and the closed impeller (35) are arranged sequentially. The open impeller (33) is fixedly sleeved on the outside of the output shaft of the water-cooled water-filling motor (30). The semi-open impeller (34) is fixedly installed back-to-back on the upper end of the open impeller (33). The closed impeller (35) is fixedly installed on the upper end of the semi-open impeller (34).

8. The agricultural high-power self-priming pump according to claim 1, characterized in that: The liquid outlet assembly includes a second support platform (36), a sealing platform (37), a positioning rod (38), and a third spring (39). The second support platform (36) is fixedly installed inside the opening at one end of the outer side of the liquid outlet pipe (7), and a liquid outlet hole is provided inside the opening at one end of the inner side of the liquid outlet pipe (7). A sealing platform (37) is provided on the side of the second support platform (36) near the upper liquid storage pipe (6), and a sealing cone surface is provided on the outer side of the sealing platform (37). A positioning rod (38) is fixedly installed at the center of the end face of the sealing platform (37) near the second support platform (36), and the positioning rod (38) is slidably inserted into the center of the second support platform (36). A third spring (39) is sleeved on the outside of the positioning rod (38), and the two ends of the third spring (39) are respectively connected to the sealing platform (37) and the second support platform (36).

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