CN112983831A

CN112983831A - Large-lift pumping equipment

Info

Publication number: CN112983831A
Application number: CN202110332901.0A
Authority: CN
Inventors: 孟赛娜
Original assignee: Qingdao Pumid Electromechanical Equipment Co ltd
Current assignee: Qingdao Pumid Electromechanical Equipment Co ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-06-18

Abstract

The invention relates to the field of water pumps, in particular to a large-lift water pumping device which comprises a movable base, a water pump and a diesel engine, wherein the water pump and the diesel engine are arranged on the base, the water pump is driven by the diesel engine and is connected through a flexible connecting mechanism, a self-lubricating cooling mechanism for lubricating is arranged at an end cover of the water pump, a double-impeller structure is arranged in the water pump, and an exhaust mechanism and a water dropping prevention mechanism are respectively arranged at the inlet end and the outlet end of the water pump. The invention combines the oil tank with the movable base structure, thereby avoiding using an external oil tank; the direct connection between the output shaft of the diesel engine and the input shaft of the water pump is realized through the flexible connecting piece, so that the structure is simpler and the volume is smaller; the auxiliary blades with the same rotation direction are arranged on the back of the main blade, so that liquid impacting on the end cover of the water pump is subjected to secondary action and throwing, the pressure of water flow on the end cover is reduced, and the leakage at the sealing part of the end cover is effectively avoided; the first machine cover and the second machine cover are lubricated and cooled by the cooling liquid in the relatively closed self-lubricating cavity.

Description

Large-lift pumping equipment

Technical Field

The invention relates to the field of water pumps, in particular to a large-lift water pumping device.

Background

In the current large-lift water pump structure, there are following several problems usually: 1. the external diesel tank is adopted as energy supply, on one hand, the external diesel tank is difficult to move synchronously with the pumping equipment, on the other hand, the pumping equipment and the external diesel tank need to be separately butted, and the mode increases the volume of the whole set of equipment and is inconvenient to operate; 2. the impeller is required to apply larger pressure to water flow in the pump so as to meet the requirement of large lift, but when high-pressure water flow passing through the impeller is hit to the position of the end cover, the pressure of the water flow to the end cover can enable the joint of the end cover to be easy to leak; 3. the mechanical seal structure of the water pump is difficult to give consideration to the performances of sealing property and friction resistance; 4. the water pump is long in time consumption, high in energy consumption cost and the like when being started and suspended.

Disclosure of Invention

The invention aims to solve the problems and provides a large-lift pumping device which adopts the following technical scheme:

the utility model provides a large-lift pumping equipment, includes mobilizable base and sets up water pump and the diesel engine on the base, and the water pump is connected through flexible coupling mechanism by the diesel engine drive, and water pump end cover department sets up the self-lubricating cooling body who is used for lubricating, and the inside bilobed wheel structure that sets up of water pump, water pump entry end and exit end set up exhaust mechanism and prevent the mechanism that falls water respectively.

On the basis of the scheme, the base comprises a shell, an oil inlet, an oil outlet and a mounting frame, an oil cavity is formed in the inner area of the shell, a flow baffle plate is fixedly connected in the oil cavity and is arranged along the vertical direction, the oil inlet and the oil outlet are fixedly arranged on the shell and are communicated with the oil cavity, the mounting frame is fixedly connected to the shell, and a connecting hole for connecting an upper part is formed in the mounting frame; the outer shell is fixedly connected with arc-shaped roller baffle plates on two sides, and rollers for driving the outer shell to move are arranged below the roller baffle plates.

Preferably, flexible connection mechanism includes coaxial setting and by first connecting piece, flexible connection spare and the second connecting piece that outer to interior connected gradually, and flexible connection spare is made by flexible material, flexible connection spare and second connecting piece fixed connection and can dismantle with first connecting piece and be connected, second connecting piece and axle sleeve coaxial coupling.

On the basis of the scheme, the outer edge of the flexible connecting piece is circumferentially provided with flexible gear shaping, and the corresponding side of the connecting piece detachably connected with the flexible connecting piece is provided with rigid gear shaping matched with the flexible gear shaping.

Preferably, the double-impeller structure comprises an impeller disc, a main blade and an auxiliary blade which are integrally formed, the main blade and the auxiliary blade have the same rotating direction and are respectively arranged on two sides of the impeller disc, and the main blade faces the water inlet direction of the water pump.

On the basis of the scheme, the double-impeller structure is fixedly connected to a pump shaft of the water pump, the pump shaft is sequentially connected with the bearing box, the machine sealing cover, the end cover, the shell and the water inlet bin, the double-impeller structure is arranged in a cavity formed by the end cover and the shell, the shell is provided with a water outlet, and the main blades face the water inlet bin.

On the basis of the scheme, the self-lubricating cooling mechanism comprises a first machine sealing cover and a second machine sealing cover which are arranged between a bearing box and a water pump end cover, wherein the first machine sealing cover and the second machine sealing cover are in mutual contact and are respectively and fixedly connected to a pump shaft, a hollow and closed self-lubricating cavity is formed between the first machine sealing cover, the second machine sealing cover and the pump shaft, the self-lubricating cavity is communicated with a first external water tank through a machine sealing cover communication hole in the first machine sealing cover, and cooling liquid or antifreeze liquid is injected into the first external water tank and the self-lubricating cavity.

On the basis of the scheme, the pump shaft is fixedly provided with a lubricating cavity impeller which is arranged in the self-lubricating cavity.

Preferably, the exhaust mechanism comprises a gas-liquid separator, an electromagnetic valve, a liquid level switch, a vacuum pump, a hydraulic drive system and a main control box, the water pump is driven by a diesel engine, the water pump is connected with the vacuum pump through the gas-liquid separator and the electromagnetic valve, the gas-liquid separator is provided with the liquid level switch, a check valve is arranged between the vacuum pump and the second external water receiving box, the vacuum pump is driven by the hydraulic drive system, and the liquid level switch, the electromagnetic valve and the hydraulic drive system are respectively connected with the main control box and driven by the main control box.

Preferably, the water falling prevention mechanism is a flap valve, the flap valve comprises a valve body, a water inlet, a water outlet, a cover plate and a baffle plate, the water inlet and the water outlet are integrally formed on the valve body along the orthogonal direction, the cover plate is fixedly connected with the valve body, and the cover plate is perpendicular to the plane of the water inlet and the water outlet and forms an acute angle with the directions of the water inlet and the water outlet respectively; the water inlet is articulated with the rotation axis with the valve body junction, fixed connection baffle and handle on the rotation axis, connect extension spring between handle and the frame, the baffle seals the water inlet and can rotates to the direction that is close to the apron.

The invention has the beneficial effects that:

1. the oil tank is combined with the movable base structure, so that an external oil tank is avoided, and the whole structure is compact; by injecting fuel oil into the oil cavity, the weight of the base part is increased, the center of gravity of the whole equipment is moved downwards, and the equipment is effectively prevented from toppling;

2. the direct connection between the output shaft of the diesel engine and the input shaft of the water pump is realized through the flexible connecting piece, and a transmission structure in the traditional equipment is omitted, so that the structure is simpler, and the volume is smaller; the flexible connecting piece can effectively buffer the vibration generated by the diesel engine, ensures the synchronism of motion transmission, and can reduce the coaxiality requirement of the structure during processing and assembling;

3. the auxiliary blades with the same rotating direction are arranged on the back of the main blade, so that liquid impacting on the end cover of the water pump is subjected to secondary action and throwing, the pressure of water flow on the end cover is reduced, leakage at the sealing part of the end cover is effectively avoided, the lift of the water pump is greatly increased, the cost is saved, and the water pump meets the performance requirement of high lift and large flow;

4. the first machine sealing cover and the second machine sealing cover are lubricated and cooled by the cooling liquid in the relatively closed self-lubricating cavity, and the cooling liquid is driven by the rotation of the impeller of the lubricating cavity to realize self-circulation, so that the lubricating and cooling effects are enhanced;

5. an exhaust mechanism is arranged at the inlet of the water pump and used for pumping away gas in the system in time when the water pump is started, so that the self-absorption of the water pump system is improved, and the water pump is started quickly; set up the flap valve in water pump exit for prevent to fall water when the water pump time-out operation, avoid restart, save time and energy consumption cost, and in time unload water through flap valve after the water pump shutdown, flap valve structure can effectively reduce the pressure loss that rivers produced when the valve body is inside simultaneously, the energy saving consumed the festival.

Drawings

FIG. 1: the invention has the overall structure schematic diagram;

FIG. 2: the invention is a schematic diagram of a base structure;

FIG. 3: the invention is a schematic side view structure of a base;

FIG. 4: the invention relates to a front view of a flexible connecting mechanism structure;

FIG. 5: the invention relates to a section sectional view of a flexible connecting mechanism A-A;

FIG. 6: the invention discloses a local enlarged view of a region B of a flexible connecting mechanism;

FIG. 7: the invention discloses a structural schematic diagram of a first connecting piece of a flexible connecting mechanism;

FIG. 8: the invention discloses a structural schematic diagram of a flexible connecting piece of a flexible connecting mechanism;

FIG. 9: the invention is a schematic structural diagram of a water pump and a self-lubricating cooling mechanism;

FIG. 10: the invention discloses a local enlarged view of a part A of a self-lubricating cooling mechanism;

FIG. 11: the structure of the lubricating cavity impeller is schematically shown;

FIG. 12: the invention is a structural schematic diagram of a double impeller;

FIG. 13: the baffle structure of the invention is shown schematically;

FIG. 14: the invention relates to a working principle flow chart of an exhaust mechanism;

FIG. 15: the structure of the clapper valve is schematic;

FIG. 16: the invention has another angle structure diagram;

FIG. 17: the invention relates to a flap valve internal structure section.

Detailed Description

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", etc., indicate orientations or positional relationships based on those shown in fig. 1, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in figure 1, a large-lift pumping device comprises a movable base 1, a water pump 5 and a diesel engine 2, wherein the water pump 5 and the diesel engine 2 are arranged on the base 1, the water pump 5 is driven by the diesel engine 2 and connected through a flexible connecting mechanism 3, a self-lubricating cooling mechanism for lubrication is arranged at the position of an end cover of the water pump 5, a double-impeller structure is arranged inside the water pump 5, and an inlet end and an outlet end of the water pump 5 are respectively provided with an exhaust mechanism 8 and a water dropping prevention mechanism.

As shown in fig. 2, the base 1 includes a housing 11, an oil inlet 16, an oil outlet 17 and a mounting frame 18, two sides of the housing 11 are fixedly connected with arc-shaped roller baffles 13, and rollers for driving the housing 11 to move are arranged below the roller baffles 13. The internal area of the housing 11 forms an oil chamber 12 for storing fuel and supplying it to the pumping equipment to which the base is connected, so as to effectively combine the fuel tank with the base, making the structure compact and lowering the centre of gravity of the whole equipment. Preferably, as shown in fig. 3, the cross section of the oil chamber 12 is trapezoidal, the vertical plates at two sides of the oil chamber 12 close to the roller baffle 13 are obliquely arranged, and the lower bottom edge of the trapezoidal cross section is shorter than the upper bottom edge, so that the overall structural strength of the housing 11 can be effectively improved. The flow baffle plates are fixedly connected in the oil cavity 12 and are arranged in the vertical direction, preferably, the flow baffle plates comprise a transverse flow baffle plate 14 and a longitudinal flow baffle plate 15, the transverse flow baffle plate 14 and the longitudinal flow baffle plate 15 are fixedly arranged in the middle of the oil cavity 12 in the horizontal plane along the orthogonal direction, and the flow baffle plates are multiple in number, so that the moving speed and the fluctuation range of oil in the oil cavity 12 are reduced, the moving speed of the oil is effectively reduced, and the phenomenon that the gravity center of the whole equipment is driven by the oil to shift and topple over is prevented in the process of starting, stopping and moving the equipment. The oil inlet 16 and the oil outlet 17 are fixedly arranged on the shell 11 and communicated with the oil cavity 12, preferably, the upper edge of the oil inlet 16 is higher than the outer surface of the shell 11, and the higher oil inlet 16 can be effectively butted to prevent oil from splashing during oil inlet. The mounting rack 18 is fixedly connected to the housing 11, a connecting hole for connecting the upper component is formed in the mounting rack 18, and meanwhile, a mounting plate and a mounting hole for connecting the upper component are also formed in the top of the flow baffle.

As shown in fig. 4 and 5, the flexible connection mechanism includes a first connection member 311, a flexible connection member 321, and a second connection member 331 that are coaxially disposed and sequentially connected from outside to inside, first mounting holes 312 are uniformly distributed on the first connection member 311 along the circumferential direction, and first bolts 313 are disposed in the first mounting holes 312 and used for fixedly connecting with the output shaft of the diesel engine 2. The second connecting piece 331 is coaxially connected with the shaft sleeve 341, the shaft sleeve 341 is sleeved outside the pump shaft 42 of the water pump 5 to transmit motion to the pump shaft 42, and a second mounting hole 332 and a third mounting hole 342 which are matched with each other are respectively arranged at the joint of the second connecting piece 331 and the shaft sleeve 341 and are connected through a second bolt 333. Preferably, as shown in fig. 6, a step portion is provided at a contact position of the sleeve 341 and the second connecting member 331, and the second connecting member 331 is snapped at the step portion, so that the second connecting member 331 is conveniently positioned and axially fixed when the sleeve 341 is assembled with the sleeve 331. The flexible connecting piece 321 is made of flexible materials, vibration of the diesel engine transmitted by the first connecting piece 311 can be buffered, the vibration degree of the second connecting piece 331 is reduced, and the concave portions 323 are arranged on the two axial side end faces of the flexible connecting piece 321, so that the flexibility and the damping effect of the flexible connecting piece 321 are improved. Preferably, the flexible connecting member 321 is made of rubber material. The flexible connecting member 321 is fixedly connected to the second connecting member 331 and detachably connected to the first connecting member 311, preferably, as shown in fig. 7 and 8, flexible gear shaping 322 is disposed on an outer edge of the flexible connecting member 321 along a circumferential direction, rigid gear shaping 313 corresponding to the flexible gear shaping 322 is disposed on a side of the first connecting member 311 adjacent to the flexible connecting member 321, the first connecting member 311 and the flexible connecting member 321 can be mounted by moving the first connecting member 311 and the flexible connecting member 321 in an axial direction, and the flexible connecting member 321 and the first connecting member 311 are connected in a tooth form, so that rotation synchronization of the first connecting member 311 and the flexible connecting member 321 can be ensured.

As shown in fig. 12, the double-impeller structure includes an impeller disc 53, a main blade 54 and an auxiliary blade 55 which are integrally formed, the main blade 54 and the auxiliary blade 55 rotate in the same direction and are respectively disposed at both sides of the impeller disc 53, and the main blade 54 faces the water inlet direction of the water pump. As shown in fig. 9, the water pump 5 includes the above-mentioned double-impeller structure, the double-impeller structure is fixedly connected to the pump shaft 42, the bearing box 41, the machine cover 44, the end cover 51, the housing 52 and the water inlet bin 56 are sequentially connected to the pump shaft 42, the double-impeller structure is disposed in a cavity formed by the end cover 51 and the housing 52, the housing 52 is provided with a water outlet, and water input through the water inlet bin 56 is discharged through the water outlet after the double-impeller structure is acted, and the water outlet is not shown in the figure. The main blade 54 faces the water inlet bin 56, the main blade 54 drives the water flow input by the water inlet bin 56 to rotate to form high-pressure water flow, part of the high-pressure water flow is not discharged from the water outlet and falls into one side of the cavity opposite to the auxiliary blade 55, and the auxiliary blade 55 drives the part of the water flow to be thrown up again in the same direction, so that the high-pressure water flow is prevented from impacting the end cover 51 to cause leakage, and meanwhile, the lift and the flow of the water pump are increased. Preferably, the secondary blades 55 have a smaller thickness than the primary blades 54 due to the smaller flow rate of water that the secondary blades 55 need to carry, thereby reducing cost and volume if necessary.

The water inlet bin 56 is fixedly provided with a baffle plate 58, the baffle plate 58 is provided with a channel penetrating along the axis of the pump shaft 42, the baffle plate 58 is used for blocking objects with large volume, such as stones in the water flow, preferably, as shown in fig. 9 and 13, the baffle plate 58 is a hollow perforated disc or a strip-shaped plate arranged at intervals, so that the water flow can reach the main blade 54 from a circular hole or an interval between the strip-shaped plates. The water flow input by the device can carry impurities such as grass leaves and leaves besides large-volume stones, in order to clean the impurities, a cutter 57 is fixedly arranged on the pump shaft 42, the cutter 57 is of a fan-blade-shaped structure and is arranged in the water inlet bin 56, the cutter 57 cuts the impurities in the process of rotating along with the pump shaft 42, a sediment discharge hole 59 is formed in the side wall of the water inlet bin 56 and is used for discharging the impurities in time, and the sediment discharge hole 59 can be arranged near the cutter 57 and/or the baffle 58. Through the combined action of baffle 58 and cutter 57, increased the trafficability characteristic of rivers in the water pump 5, effectively avoided debris in the rivers to cause the damage to water pump 5.

As shown in fig. 9 and 10, the self-lubricating cooling mechanism includes a first machine cover 43 and a second machine cover 44 disposed between the bearing housing 41 and the water pump end cover 51, the first machine cover 43 and the second machine cover 44 are disposed in contact with each other and respectively fixedly connected to the pump shaft 42, a hollow and closed self-lubricating cavity 45 is formed between the first machine cover 43, the second machine cover 44 and the pump shaft 42, and a liquid is injected into the self-lubricating cavity 45. The pump shaft 42 is fixedly provided with a lubrication cavity impeller 47, as shown in fig. 11, the lubrication cavity impeller 47 is arranged in the self-lubrication cavity 45, the lubrication cavity impeller 47 can be integrally formed with the pump shaft 42, and the pump shaft 42 drives the lubrication cavity impeller 47 to rotate together when rotating. The first machine cover 43 is provided with a machine cover communication hole 46, the machine cover communication hole 46 is communicated with a first external water tank and the self-lubricating cavity 45, liquid is injected into the self-lubricating cavity 45 through the first external water tank, a liquid circulation space is provided, according to actual use requirements, the first external water tank and the self-lubricating cavity 45 can be injected with cooling liquid or antifreeze liquid, and a specific structure diagram of the first external water tank is not shown. When the water pump 5 operates, the pump shaft 42 drives the lubricating cavity impeller 47 to rotate, so that the liquid in the self-lubricating cavity 45 is driven to realize self-circulation, and the mechanical sealing positions of the first machine sealing cover 43, the second machine sealing cover 44 and the pump shaft 42 are cooled and lubricated by the cooling liquid, so that the cooling liquid and the lubricating liquid do not need to be additionally added, the self-lubricating can be carried out on a mechanical sealing structure, and the dry friction is prevented from occurring. Meanwhile, the first machine cover 43 is used for preventing the cooling liquid in the self-lubricating cavity 45 from leaking into the bearing box 41, the second machine cover 44 is used for preventing the water flow at the impeller disc 53 in the water pump from leaking into the self-lubricating cavity 45, and the first machine cover 43 and the second machine cover 44 can both prevent the water flow of the water pump from leaking into the bearing box 41, so that the sealing performance of the structure can be better improved through a double mechanical sealing mechanism.

As shown in fig. 14, the exhaust mechanism 8 includes a gas-liquid separator, an electromagnetic valve, a liquid level switch, a vacuum pump, a hydraulic drive system, and a main control box, the water pump 5 is connected to the suction pipe and driven by the diesel engine 2, the water pump 5 is connected to the vacuum pump through the gas-liquid separator and the electromagnetic valve, the gas-liquid separator is provided with the liquid level switch, a check valve is provided between the vacuum pump and the second external water box, the vacuum pump is a water ring vacuum pump, the vacuum pump is driven by the hydraulic drive system, and the liquid level switch, the electromagnetic valve, and the hydraulic drive system are respectively connected to and driven. When the water pump 5 starts, the main control box controls the hydraulic driving system to drive the water ring vacuum pump to operate, the second external water receiving box provides working liquid or cooling liquid for the vacuum pump, air in the water pump 5 and the pipeline system is discharged through the gas-liquid separator and the electromagnetic valve through the operation of the vacuum pump, the water pump 5 further absorbs water through the water absorbing pipe, when the liquid level switch of the gas-liquid separator detects that the water level in the water pump 5 reaches a specified position, when the water pump 5 can absorb water automatically, the liquid level switch transmits a signal to the main control box, the main control box stops the electromagnetic valve and the hydraulic driving system from operating, and therefore the starting process of the water pump 5 is completed.

The water dropping prevention mechanism is a flap valve, and the flap valve is structurally shown in fig. 15 to 17 and comprises a valve body 70, a water inlet 71, a water outlet 72, a cover plate 73 and a baffle plate 75, wherein the water inlet 71 and the water outlet 72 are integrally formed on the valve body 70 along an orthogonal direction, the cover plate 73 is fixedly connected with the valve body 70, and the cover plate 73 is perpendicular to the plane where the water inlet 71 and the water outlet 72 are located and forms an acute angle with the directions of the water inlet 71 and the water outlet 72 respectively, so that a structure for reducing pressure loss is formed. The rotating shaft 74 is hinged at the joint of the water inlet 70 and the valve body 70, the baffle 75 and the handle 76 are fixedly connected to the rotating shaft 74, the baffle 75 is controlled to rotate by rotating the handle 76, the extension spring 77 is connected between the handle 76 and the frame, the frame is not shown in the figure, the handle 76 is close to the frame through the extension spring 77, the baffle 75 covers the water inlet 71, the baffle 75 seals the water inlet 71 and can rotate in the direction close to the cover plate 73, the baffle 75 seals the water inlet 71 under the action of the extension spring 77 under the normal condition, the clapper valve is installed at the water outlet position of the pump, and when water enters the water inlet 71, the baffle 75 is turned to the position close to the cover plate 73 through water pressure, so that the water is discharged. When water inflow is suspended, the baffle plate 75 closes the water inlet 71 under the action of the extension spring 77 to prevent air from entering, so that the water falling prevention effect is achieved; after the water pump stops operating, the baffle 75 is rotated by rotating the handle 76, so that the water inlet 71 is communicated with the water outlet 72, and the water in the water inlet 71 is discharged. In order to improve the sealing performance of the contact surface between the baffle plate 75 and the water inlet 71, a sealing structure is arranged between the baffle plate 75 and the water inlet 71, the sealing structure and the baffle plate 75 are fixedly connected through a fixing bolt and the like, and the sealing structure is a sealing gasket 78 and/or a sealing ring 79. Preferably, the drain opening 72 is disposed downward, and the valve body 70 above the drain opening 72 has an inverted cone shape, so that the water flow and dirt carried by the water flow can be discharged outward through the drain opening 72, and the dirt deposition in the valve body 70 can be prevented.

The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.

Claims

1. The utility model provides a large-lift pumping equipment, its characterized in that, including mobilizable base (1) and water pump (5) and diesel engine (2) of setting on base (1), water pump (5) are driven by diesel engine (2) and are connected through flexible coupling mechanism (3), water pump (5) end cover department sets up the self-lubricating cooling body who is used for lubricating, water pump (5) inside sets up the bilobed wheel structure, water pump (5) entry end sets up exhaust mechanism (8) and prevents the water dropping mechanism respectively with the exit end.

2. The large-lift water pumping device as claimed in claim 1, wherein the base (1) comprises a housing (11), an oil inlet (16), an oil outlet (17) and a mounting frame (18), the inner area of the housing (11) forms an oil chamber (12), a flow baffle is fixedly connected in the oil chamber (12), the flow baffle is arranged along the vertical direction, the oil inlet (16) and the oil outlet (17) are fixedly arranged on the housing (11) and communicated with the oil chamber (12), the mounting frame (18) is fixedly connected to the housing (11), and the mounting frame (18) is provided with a connecting hole for connecting an upper part; arc-shaped roller baffle plates (13) are fixedly connected to the two sides of the shell (11), and rollers used for driving the shell (11) to move are arranged below the roller baffle plates (13).

3. The high-lift water pumping equipment according to claim 1, wherein the flexible connection mechanism comprises a first connection member (311), a flexible connection member (321) and a second connection member (331) which are coaxially arranged and sequentially connected from outside to inside, the flexible connection member (321) is made of flexible materials, the flexible connection member (321) is fixedly connected with the second connection member (331) and detachably connected with the first connection member (311), and the second connection member (331) is coaxially connected with the shaft sleeve (341).

4. A high-lift water pumping device as claimed in claim 3, wherein the flexible connecting member (321) is provided with flexible gear teeth (322) along the circumferential direction at the outer edge thereof, and rigid gear teeth (313) corresponding to the flexible gear teeth (322) are provided at the corresponding side of the connecting member detachably connected with the flexible connecting member.

5. The high-lift water pumping device as claimed in claim 1, wherein the double-impeller structure comprises an impeller disc (53), a main blade (54) and an auxiliary blade (55) which are integrally formed, the main blade (54) and the auxiliary blade (55) have the same rotating direction and are respectively arranged at two sides of the impeller disc (53), and the main blade (54) faces the water inlet direction of the water pump.

6. The high-lift water pumping equipment as claimed in claim 5, wherein the double-impeller structure is fixedly connected to a pump shaft (42) of the water pump (5), the pump shaft (42) is sequentially connected with a bearing box (41), a machine cover (44), an end cover (51), a shell (52) and a water inlet bin (56), the double-impeller structure is arranged in a cavity formed by the end cover (51) and the shell (52), a water outlet is arranged on the shell (52), and the main blade (54) faces the water inlet bin (56).

7. The high-lift pumping equipment according to claim 6, wherein the self-lubricating cooling mechanism comprises a first machine cover (43) and a second machine cover (44) which are arranged between the bearing box (41) and the water pump end cover (51), the first machine cover (43) and the second machine cover (44) are in contact with each other and are respectively and fixedly connected to the pump shaft (42), a hollow and closed self-lubricating cavity (45) is formed among the first machine cover (43), the second machine cover (44) and the pump shaft (42), the self-lubricating cavity (45) is communicated with the first external water tank through a machine cover communication hole (46) on the first machine cover (43), and cooling liquid or anti-freezing liquid is injected into the first external water tank and the self-lubricating cavity (45).

8. The high-lift water pumping device as claimed in claim 7, wherein a lubrication chamber impeller (47) is fixedly arranged on the pump shaft (42), and the lubrication chamber impeller (47) is arranged in the self-lubrication chamber (45).

9. The large-lift water pumping device as claimed in claim 1, wherein the exhaust mechanism (8) comprises a gas-liquid separator, an electromagnetic valve, a liquid level switch, a vacuum pump, a hydraulic drive system and a main control box, the water pump (5) is driven by the diesel engine (2) through a water suction pipe, the water pump (5) is connected with the vacuum pump through the gas-liquid separator and the electromagnetic valve, the gas-liquid separator is provided with the liquid level switch, a check valve is arranged between the vacuum pump and the second external water box, the vacuum pump is driven by the hydraulic drive system, and the liquid level switch, the electromagnetic valve and the hydraulic drive system are respectively connected with and driven by the main control box.

10. The high-lift water pumping device according to claim 1, wherein the water falling prevention mechanism is a flap valve, the flap valve comprises a valve body (70), a water inlet (71), a water outlet (72), a cover plate (73) and a baffle plate (75), the water inlet (71) and the water outlet (72) are integrally formed on the valve body (70) along an orthogonal direction, the cover plate (73) is fixedly connected with the valve body (70), and the cover plate (73) is perpendicular to the plane of the water inlet (71) and the water outlet (72) and forms an acute angle with the directions of the water inlet (71) and the water outlet (72) respectively; a rotating shaft (74) is hinged to the joint of the water inlet (70) and the valve body (70), a baffle plate (75) and a handle (76) are fixedly connected to the rotating shaft (74), a tension spring (77) is connected between the handle (76) and the rack, and the baffle plate (75) seals the water inlet (70) and can rotate towards the direction close to the cover plate (73).