CN112112816B

CN112112816B - Multistage impeller axial-flow pump for agricultural machinery

Info

Publication number: CN112112816B
Application number: CN202011011673.9A
Authority: CN
Inventors: 张利利; 侯迪迪; 韩雨晴; 王露颖; 倪松翔; 余庆; 余安琪; 韩昌宇; 余雷
Original assignee: Sixian Jinwan Pump Industry Co ltd
Current assignee: Sixian Jinwan Pump Industry Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2022-05-31
Anticipated expiration: 2040-09-23
Also published as: CN112112816A

Abstract

The invention discloses a multistage impeller axial-flow pump for agricultural machinery, which comprises a pump pipe, wherein the top of the pump pipe is fixedly connected with a sealing shell, the inner surface of the sealing shell is fixedly connected with a motor through a motor frame, the output end of the motor is fixedly connected with a rotating shaft through a coupler, one end of the rotating shaft penetrates through the pump pipe and extends to the inside of the pump pipe, the outer surface of the rotating shaft is fixedly connected with a guide vane, and an impeller is fixedly connected to the outer surface of the rotating shaft and positioned below the guide vane. This multistage impeller axial-flow pump is used to agricultural machinery blocks pasture and water through setting up first filter in the inside of fixed cover, cooperates the lug on the fixed cover and the ladder groove in the sliding block to utilize gag lever post and the stopper on the fixed block to fix fixed cover, and pull down fixed cover through the pull rod pulling sliding block is quick, consequently be convenient for get rid of the pasture and water on the first filter.

Description

Multistage impeller axial-flow pump for agricultural machinery

Technical Field

The invention relates to the technical field of axial-flow pumps, in particular to a multistage impeller axial-flow pump for agricultural machinery.

Background

The axial flow pump is a pump for conveying liquid in the axial direction by the action force of the blades of the rotating impeller on the liquid, and there are vertical, horizontal, inclined and through-flow pumps. The axial-flow pump impeller is generally provided with 2-7 blades and rotates in a circular tube-shaped pump shell. The pump casing on the upper part of the impeller is provided with fixed guide vanes for eliminating the rotation motion of the liquid, converting the rotation motion into axial motion and converting the kinetic energy of the rotation motion into pressure energy. Axial pumps are usually single stage, with a few being made as two stages.

Chinese patent discloses an axial flow pump of agricultural waterproof grass (publication number: CN110529389A3), which comprises a water inlet pipe, a water outlet pipe and a bent pipe for connecting the water inlet pipe and the water outlet pipe, wherein a rotating shaft is inserted into the bent pipe, a motor is fixed at the bent pipe through a motor support and is used for driving the rotating shaft, a first rotating wheel, a second rotating wheel and a third rotating wheel are arranged on the rotating shaft, the first rotating wheel is provided with a first blade, the second rotating wheel is provided with a second blade, the third rotating wheel is provided with a rotating blade, and the third rotating wheel is positioned above the first rotating wheel and the second rotating wheel; import and export of inlet tube has filter screen portion, can avoid debris to get into the inlet tube, avoids damaging the axial-flow pump, but the winding of pasture and water in filter screen portion probably appears, and consequently filter screen portion twines very easily has pasture and water, and this filter screen portion is fixed connection, consequently is difficult to dismantle and clear up, if the water area that the pasture and water is less, filter screen portion can reduce the speed of play water.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a multistage impeller axial-flow pump for agricultural machinery, which solves the problems that the filter screen part in CN110529389A3 is difficult to disassemble, so that aquatic plants are difficult to clean, and the filter screen part is too thin to influence the water outlet speed.

(II) technical scheme

In order to realize the purpose, the invention is realized by the following technical scheme: a multi-stage impeller axial-flow pump for agricultural machinery comprises a pump pipe, wherein a sealing shell is fixedly connected to the top of the pump pipe, a motor is fixedly connected to the inner surface of the sealing shell through a motor frame, the output end of the motor is fixedly connected with a rotating shaft through a coupler, one end of the rotating shaft penetrates through the pump pipe and extends into the pump pipe, a guide vane is fixedly connected to the outer surface of the rotating shaft, an impeller is fixedly connected to the outer surface of the rotating shaft and is positioned below the guide vane, a fixing sleeve is movably connected to the outer surface of the bottom end of the pump pipe, a first filter plate penetrates through the bottom of the fixing sleeve, protruding blocks are fixedly connected to two sides of the top of the fixing sleeve, sliding blocks are slidably connected to two sides of the top of the fixing sleeve, a stepped groove is formed in the bottom of the sliding block, the inner surface of the stepped groove is slidably connected with the outer surface of the protruding blocks, and fixed blocks are fixedly connected to two sides of the outer surface of the pump pipe, the sliding tray has been seted up to the bottom of fixed block to the top swing joint of fixed block has the gag lever post, the bottom of gag lever post is from last to running through fixed block and sliding tray in proper order down and extending to the inside of sliding tray, the bottom fixedly connected with stopper of gag lever post, one side of stopper contacts with one side of lug, the surface cover of gag lever post is equipped with the jacking spring, the surface of axis of rotation just is located the below fixedly connected with rotating blade of impeller.

Preferably, the internal surface in ladder groove and the surface sliding connection of stopper to the surface of stopper and the internal surface looks adaptation of sliding tray, two the top of keeping away from one side relatively of sliding block and the equal fixedly connected with in below decide the piece, two it all rotates to be connected with the minor axis, two to decide the relative one side of piece fixedly connected with pull rod between the relative one side of minor axis.

Preferably, the equal fixedly connected with dog in both sides of pump line inner wall, two the relative one side of dog is rotated and is connected with the second filter, the adapter sleeve has been run through at the top of second filter, the internal surface of adapter sleeve and the surface rotation of axis of rotation are connected, the top fixedly connected with of first filter rotates the cover, the bottom of rotating the cover runs through first filter and extends to the outside of first filter to the internal surface rotation that rotates the cover is connected with the dead lever, the bottom of dead lever runs through the second filter and extends to the outside of second filter, the surface of dead lever and the internal surface looks adaptation that rotates the cover.

Preferably, the bottom of axis of rotation has been seted up and has been put the thing chamber, the surface of dead lever with put the internal surface sliding connection in thing chamber, the top fixedly connected with compression spring of dead lever, compression spring's top fixedly connected with concave piece, the equal first connecting block of fixedly connected with in both sides at concave piece top, put the both sides in thing chamber and seted up logical chamber, the equal sliding connection in both sides at the top of putting the thing intracavity chamber has the second connecting block, the surface of first connecting block rotates through the connecting axle and is connected with the swinging arms, the one end of swinging arms rotates through connecting axle and second connecting block and is connected, the equal fixedly connected with brush hair pole in both sides of axis of rotation surface.

Preferably, the outer surface of the fixed rod is movably connected with a top rod, the front side and the rear side of the top rod are fixedly connected with limit shafts, the two sides of the top rod are provided with travel grooves, the bottom of the top rod is provided with a key groove, the inner surface of the key groove is connected with the outer surface of the fixed rod in a sliding mode, and the outer surface of the limit shaft is connected with the inner surface of the travel groove in a sliding mode.

Preferably, one side of the inner wall of the pump pipe is fixedly connected with a packing box, the top of the packing box penetrates through the pump pipe and extends to the outside of the pump pipe, the bottom of the inner cavity of the packing box is fixedly connected with a rubber bearing, the bottom of the rubber bearing penetrates through the packing box and extends to the outside of the packing box, packing is arranged in the packing box, and the top of the packing box is in threaded connection with a packing gland.

Preferably, the outer surface of the rotating shaft is rotatably connected with the inside of the packing gland, and the inner surface of the rotating shaft is fixedly connected with the inner surface of the rubber bearing.

Preferably, the working principle of the multistage impeller axial flow pump for the agricultural machinery comprises the following steps:

the method comprises the following steps: firstly, the pull rod is rotated through the short shaft between the two fixed blocks, and the two pull rods are pulled, so that the two sliding blocks move towards the side which is relatively far away, at the moment, the convex blocks slide on the inner surface of the stepped groove, then the fixed rod and the mandril are aligned with the inside of the rotating sleeve on the first filter plate, the fixed sleeve is sleeved at the bottom end of the pump pipe, at the moment, the limiting rod is pulled upwards, the limiting block is positioned in the sliding groove, the jacking spring is in a compressed state at the same time, the two sliding blocks slide towards the opposite side by pushing the pull rod and are contacted with the outer surface of the pump pipe, then the limiting block is loosened, under the action of the jacking spring, the limiting block slides to the inner surface of the stepped groove from the inner surface of the sliding groove, one side of the limiting block is contacted with one side of the convex block, and then the pull rod is rotated to enable the pull rod to be contacted with the outer surface of the sliding block;

step two: the fixed rod is pressed down, so that the fixed rod slides in the storage cavity, the compression spring is compressed, the fixed rod pushes the concave block to move upwards, the swinging rods on the two first connecting blocks swing, the two second connecting blocks are further pushed to slide towards the side far away from the through cavity until the two second connecting blocks prop against the connecting sleeve, then the fixed rod is rotated, the rotating sleeve drives the second filter plate to rotate, the ejector rod is rotated to be in a horizontal state, the ejector rod is pushed again, the fixed rod slides on the inner surface of the key groove, the limiting shaft slides on the inner surface of the stroke groove, and at the moment, the ejector rod is in contact with the rotating sleeve;

step three: then with motor and external power supply electric connection, the rotation of motor drives the axis of rotation and rotates, further drive the epaxial impeller of axis of rotation, the stator, rotary blade and brush hair pole rotate, thereby carry water, in the transport, pasture and water are kept off the surface at first filter and second filter, brush hair pole is washd the impurity and the earth on first filter and second filter surface simultaneously, after the inside of few thin weeds entering pump line, cut off weeds through pivoted rotary blade;

step four: the water in the pump pipe is blocked by the rubber bearing, and the water is blocked in the pump pipe by the filler in the filler box, and the water flows out from the top end of the pump pipe.

(III) advantageous effects

The invention provides a multistage impeller axial-flow pump for agricultural machinery. Compared with the prior art, the method has the following beneficial effects:

(1) in the invention, the outer surface of the bottom end of a pump pipe is movably connected with a fixed sleeve, a first filter plate penetrates through the bottom of the fixed sleeve, lugs are fixedly connected with two sides of the top of the fixed sleeve, sliding blocks are slidably connected with two sides of the top of the fixed sleeve, a stepped groove is formed in the bottom of the sliding block, the inner surface of the stepped groove is slidably connected with the outer surface of the lug, fixed blocks are fixedly connected with two sides of the outer surface of the pump pipe, a sliding groove is formed in the bottom of each fixed block, a limiting rod is movably connected with the top of each fixed block, the bottom end of the limiting rod sequentially penetrates through the fixed blocks and the sliding groove from top to bottom and extends into the sliding groove, a limiting block is fixedly connected with the bottom end of the limiting rod, one side of the limiting block is contacted with one side of the lug, a jacking spring is sleeved on the outer surface of the limiting rod, and a rotary blade is fixedly connected with the outer surface of a rotary shaft below an impeller, set up first filter through the inside at fixed cover and block pasture and water, the lug on the fixed cover of cooperation and the ladder groove in the sliding block to utilize gag lever post and the stopper on the fixed block to fix fixed cover, and pull down fixed cover through the pull rod pulling sliding block is quick, so be convenient for get rid of the pasture and water on the first filter.

(2) The two sides of the inner wall of a pump pipe are fixedly connected with check blocks, one side opposite to the two check blocks is rotatably connected with a second filter plate, the top of the second filter plate is penetrated with a connecting sleeve, the inner surface of the connecting sleeve is rotatably connected with the outer surface of a rotating shaft, the top of the first filter plate is fixedly connected with a rotating sleeve, the bottom of the rotating sleeve penetrates through the first filter plate and extends to the outside of the first filter plate, the inner surface of the rotating sleeve is rotatably connected with a fixed rod, the bottom end of the fixed rod penetrates through the second filter plate and extends to the outside of the second filter plate, the outer surface of the fixed rod is matched with the inner surface of the rotating sleeve, the bottom end of the rotating shaft is provided with a storage cavity, the outer surface of the fixed rod is slidably connected with the inner surface of the storage cavity, the top end of the fixed rod is fixedly connected with a compression spring, the top end of the compression spring is fixedly connected with a concave block, and the two sides of the top of the concave block are fixedly connected with the first connecting block, two sides of the article placing cavity are provided with through cavities, two sides of the top of the inner cavity of the article placing cavity are both connected with second connecting blocks in a sliding way, the outer surface of the first connecting block is rotatably connected with a swinging rod through a connecting shaft, one end of the swinging rod is rotatably connected with the second connecting blocks through the connecting shaft, two sides of the outer surface of the rotating shaft are both fixedly connected with brush hair rods, by arranging the second filter plate between the two stop blocks and matching with the compression spring and the concave block in the storage chamber, when the fixed rod is pressed down, the two second connecting blocks can be enabled to be propped against the inner surface of the connecting sleeve, the second filter plate on the connecting sleeve can be driven to rotate in a small range by rotating the fixed rod, thereby can adjust the contact ratio between first filter and the second filter to can increase or reduce the aperture that water flows through, improve the speed of going out water under the prerequisite that can adapt to the different waters of pasture and water quantity.

(3) According to the invention, the outer surface of the fixed rod is movably connected with the ejector rod, the front side and the rear side of the ejector rod are fixedly connected with the limiting shafts, the two sides of the ejector rod are respectively provided with the stroke groove, the bottom of the ejector rod is provided with the key groove, the inner surface of the key groove is in sliding connection with the outer surface of the fixed rod, the outer surface of the limiting shaft is in sliding connection with the inner surface of the stroke groove, the state of the ejector rod can be adjusted by arranging the ejector rod and arranging the stroke groove and the key groove on the ejector rod, when the ejector rod is in a horizontal state, the fixed sleeve can be further limited, and the stability of the fixed sleeve is improved.

Drawings

FIG. 1 is a front view of the internal structure of an axial flow pump of the present invention;

FIG. 2 is a front view of the internal structure of the slider of the present invention;

fig. 3 is a perspective view of the external structure of the fixing sleeve of the present invention;

FIG. 4 is an enlarged view of a portion of the structure of FIG. 1 at A;

FIG. 5 is a front view of the internal structure of the storage compartment of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 1 at B according to the present invention;

FIG. 7 is a sectional view showing a partial structure of the carrier rod according to the present invention;

fig. 8 is a front view of the internal structure of the shaft stuffing box of the present invention.

In the figure, 1, a pump tube; 2. sealing the shell; 3. a motor; 4. a rotating shaft; 5. a guide vane; 6. an impeller; 7. fixing a sleeve; 8. a first filter plate; 9. a bump; 10. a slider; 11. a stepped groove; 12. a fixed block; 13. a packing gland; 14. a sliding groove; 15. a limiting rod; 16. a limiting block; 17. a jacking spring; 18. a rotary blade; 19. fixing blocks; 20. a minor axis; 21. a pull rod; 22. a stopper; 23. a second filter plate; 24. connecting sleeves; 25. rotating the sleeve; 26. fixing the rod; 27. a storage cavity; 28. a compression spring; 29. a concave block; 30. a first connection block; 31. a cavity is communicated; 32. a second connecting block; 33. a swing lever; 34. a bristle bar; 35. a top rod; 36. a limiting shaft; 37. a stroke slot; 38. a keyway; 39. a stuffing box; 40. a rubber bearing; 41. and (4) filling.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, an embodiment of the present invention provides a technical solution: a multi-stage impeller axial-flow pump for agricultural machinery comprises a pump pipe 1, the top of the pump pipe 1 is fixedly connected with a sealing shell 2, the inner surface of the sealing shell 2 is fixedly connected with a motor 3 through a motor frame, the motor 3 is electrically connected with an external power supply, the output end of the motor 3 is fixedly connected with a rotating shaft 4 through a coupler, one end of the rotating shaft 4 penetrates through the pump pipe 1 and extends to the inside of the pump pipe 1, the outer surface of the rotating shaft 4 is fixedly connected with a guide vane 5, the outer surface of the rotating shaft 4 is fixedly connected with an impeller 6 below the guide vane 5, the outer surface of the bottom end of the pump pipe 1 is movably connected with a fixed sleeve 7, the bottom of the fixed sleeve 7 is penetrated with a first filter plate 8, two sides of the top of the fixed sleeve 7 are fixedly connected with convex blocks 9, two sides of the top of the fixed sleeve 7 are both slidably connected with sliding blocks 10, the bottom of the sliding blocks 10 is provided with stepped grooves 11, the inner surface of the stepped grooves 11 is slidably connected with the outer surfaces of the convex blocks 9, both sides of the outer surface of the pump pipe 1 are fixedly connected with fixed blocks 12, the bottom of the fixed block 12 is provided with a sliding groove 14, the top of the fixed block 12 is movably connected with a limiting rod 15, the bottom end of the limiting rod 15 sequentially penetrates through the fixed block 12 and the sliding groove 14 from top to bottom and extends into the sliding groove 14, the bottom end of the limiting rod 15 is fixedly connected with a limiting block 16, one side of the limiting block 16 is contacted with one side of a convex block 9, the outer surface of the limiting rod 15 is sleeved with a jacking spring 17, aquatic weed is blocked by arranging a first filter plate 8 in the fixed sleeve 7, the convex block 9 on the fixed sleeve 7 and a stepped groove 11 in the sliding block 10 are matched, the fixed sleeve 7 can be fixed by utilizing the limiting rod 15 and the limiting block 16 on the fixed block 12, and the sliding block 10 is pulled by a pull rod 21 to rapidly detach the fixed sleeve 7, so that the aquatic weed on the first filter plate 8 can be removed, the outer surface of the rotating shaft 4 is fixedly connected with a rotary blade 18 below the impeller 6, the inner surface of the stepped groove 11 is connected with the outer surface of the limiting block 16 in a sliding manner, the outer surface of the limiting block 16 is matched with the inner surface of the sliding groove 14, the upper part and the lower part of one side, which is far away from one side of the two sliding blocks 10, are both fixedly connected with fixed blocks 19, the opposite sides of the two fixed blocks 19 are both rotatably connected with short shafts 20, a pull rod 21 is fixedly connected between the opposite sides of the two short shafts 20, both sides of the inner wall of the pump pipe 1 are both fixedly connected with check blocks 22, the opposite sides of the two check blocks 22 are rotatably connected with second filter plates 23, connecting sleeves 24 penetrate through the tops of the second filter plates 23, the inner surfaces of the connecting sleeves 24 are rotatably connected with the outer surface of the rotating shaft 4, rotating sleeves 25 are fixedly connected with the tops of the first filter plates 8, and the bottoms of the rotating sleeves 25 penetrate through the first filter plates 8 and extend to the outsides of the first filter plates 8, and the inner surface of the rotating sleeve 25 is rotatably connected with a fixed rod 26, the bottom end of the fixed rod 26 penetrates through the second filter plate 23 and extends to the outside of the second filter plate 23, the outer surface of the fixed rod 26 is matched with the inner surface of the rotating sleeve 25, the bottom end of the rotating shaft 4 is provided with a storage cavity 27, the outer surface of the fixed rod 26 is slidably connected with the inner surface of the storage cavity 27, the top end of the fixed rod 26 is fixedly connected with a compression spring 28, the top end of the compression spring 28 is fixedly connected with a concave block 29, when the fixed rod 26 is pressed, the top end of the fixed rod 26 is contacted with the concave block 29, so that the concave block 29 can be pushed upwards, the compression spring 28 is in a compression state, the two sides of the top of the concave block 29 are fixedly connected with first connecting blocks 30, the two sides of the storage cavity 27 are provided with through cavities 31, the two sides of the top of the inner cavity of the storage cavity 27 are slidably connected with second connecting blocks 32, clamping grooves can be arranged on the two sides of the connecting sleeve 24 to be matched with the second connecting blocks 32, prevent slipping between the second connecting block 32 and the rotating sleeve 25, a clamping groove can be arranged at the contact position of the concave block 29 and the fixing rod 26, prevent the fixing rod 26 from slipping when rotating, the concave block 29 and the fixing rod 26 slip, rotate the second filter plate 23 to adjust the contact ratio of the pores on the first filter plate 8 and the second filter plate 23, improve the speed of pumping water, the outer surface of the first connecting block 30 is rotatably connected with a swinging rod 33 through a connecting shaft, one end of the swinging rod 33 is rotatably connected with the second connecting block 32 through the connecting shaft, both sides of the outer surface of the rotating shaft 4 are fixedly connected with bristle rods 34, the outer surface of the fixing rod 26 is movably connected with a top rod 35, both front and back sides of the top rod 35 are fixedly connected with limit shafts 36, both sides of the top rod 35 are provided with stroke grooves 37, the bottom of the top rod 35 is provided with a key groove 38, the inner surface of the key groove 38 is slidably connected with the outer surface of the fixing rod 26, by arranging the ejector rod 35 and arranging the stroke groove 37 and the key groove 38 on the ejector rod 35, the state of the ejector rod 35 can be adjusted, when the ejector rod 35 is in a horizontal state, the fixed sleeve 7 can be further limited, the stability of the fixed sleeve 7 is improved, the practicability of the fixed sleeve is further enhanced, the outer surface of the limiting shaft 36 is in sliding connection with the inner surface of the stroke groove 37, one side of the inner wall of the pump pipe 1 is fixedly connected with a stuffing box 39, the top of the stuffing box 39 penetrates through the pump pipe 1 and extends to the outside of the pump pipe 1, the bottom of the inner cavity of the stuffing box 39 is fixedly connected with a rubber bearing 40, the bottom of the rubber bearing 40 penetrates through the stuffing box 39 and extends to the outside of the stuffing box 39, a stuffing 41 is arranged inside the stuffing box 39, the stuffing 41 and the rubber bearing 40 can prevent water from entering the inside of the sealing shell 2 from the periphery of the rotating shaft 4, the top of the stuffing box 39 is in threaded connection with a stuffing cover 13, the packing gland 13 is used for compressing the packing 41, the outer surface of the rotating shaft 4 is rotatably connected with the inside of the packing gland 13, and the inner surface of the rotating shaft 4 is fixedly connected with the inner surface of the rubber bearing 40.

In the invention, the working principle of the multistage impeller axial flow pump for the agricultural machinery comprises the following steps:

the method comprises the following steps: firstly, the pull rod 21 is rotated through the short shaft 20 between the two fixed blocks 19, the two pull rods 21 are pulled, so that the two sliding blocks 10 move to the side far away from each other, the convex block 9 slides on the inner surface of the stepped groove 11, then the fixed rod 26 and the ejector rod 35 are aligned with the inner part of the rotating sleeve 25 on the first filter plate 8, the fixed sleeve 7 is sleeved at the bottom end of the pump tube 1, the limiting rod 15 is pulled upwards at the moment, so that the limiting block 16 is positioned in the sliding groove 14, the jacking spring 17 is in a compressed state at the same time, the two sliding blocks 10 slide to the opposite side by pushing the pull rod 21 and are contacted with the outer surface of the pump tube 1, then the limiting rod 15 is loosened, the limiting block 16 slides to the inner surface of the stepped groove 11 from the inner surface of the sliding groove 14 under the action of the jacking spring 17, and one side of the limiting block 16 is contacted with one side of the convex block 9, thereby fixing the fixing sleeve 7 at the bottom end of the pump tube 1, and then rotating the pull rod 21 so that the pull rod 21 is in contact with the outer surface of the slide block 10;

step two: the fixing rod 26 is pressed down, so that the fixing rod 26 slides upwards in the storage cavity 27 and is in contact with the concave blocks 29, the compression spring 28 is compressed, the fixing rod 26 pushes the concave blocks 29 to move upwards, the swinging rods 33 on the two first connecting blocks 30 swing, the two second connecting blocks 32 are further pushed to slide towards the side far away from the inside of the through cavity 31 until the two second connecting blocks 32 push the connecting sleeve 24, then the fixing rod 26 is rotated, the rotating sleeve 25 drives the second filter plate 23 to rotate, the ejector rod 35 is rotated, the ejector rod 35 is in a horizontal state, the ejector rod 35 is pushed, the fixing rod 26 slides on the inner surface of the key groove 38, the limiting shaft 36 slides on the inner surface of the stroke groove 37, and the ejector rod 35 is in contact with the rotating sleeve 25;

step three: then with motor 3 and external power source electric connection, the rotation of motor 3, drive axis of rotation 4 and rotate, further drive impeller 6 on the axis of rotation 4, stator 5, rotary blade 18 and brush hair pole 34 rotate, thereby carry water, in the transport, pasture and water are kept off the surface at first filter 8 and second filter 23, brush hair pole 34 washs the impurity and the earth on first filter 8 and second filter 23 surface simultaneously, little part of thinner weeds get into behind the inside of pump line 1, cut off weeds through pivoted rotary blade 18;

step four: the water in the pump tube 1 is blocked by the rubber bearing 40, and the packing 41 in the packing box 39 is pressed by the packing gland 13, so that the water can be blocked in the pump tube 1, and the water flows out from the top end of the pump tube 1.

And those not described in detail in this specification are well within the skill of those in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a multistage impeller axial-flow pump for agricultural machinery, includes pump line (1), top fixedly connected with seal shell (2) of pump line (1), motor frame fixedly connected with motor (3) are passed through to the internal surface of seal shell (2), shaft coupling fixedly connected with axis of rotation (4) is passed through to the output of motor (3), the one end of axis of rotation (4) runs through pump line (1) and extends to the inside of pump line (1), the outer fixed surface of axis of rotation (4) is connected with stator (5), the surface of axis of rotation (4) just is located below fixedly connected with impeller (6) of stator (5), its characterized in that: the outer surface swing joint of pump line (1) bottom has fixed cover (7), the bottom of fixed cover (7) is run through has first filter (8), the equal fixedly connected with lug (9) in both sides at fixed cover (7) top to the equal sliding connection in both sides at fixed cover (7) top has sliding block (10), ladder groove (11) has been seted up to the bottom of sliding block (10), the internal surface of ladder groove (11) and the surface sliding connection of lug (9), the both sides of pump line (1) surface all fixedly connected with fixed block (12), sliding tray (14) has been seted up to the bottom of fixed block (12), and the top swing joint of fixed block (12) has gag lever post (15), the bottom of gag lever post (15) runs through fixed block (12) and sliding tray (14) from last to down in proper order and extends to the inside of sliding tray (14), the bottom end of the limiting rod (15) is fixedly connected with a limiting block (16), one side of the limiting block (16) is in contact with one side of the convex block (9), the outer surface of the limiting rod (15) is sleeved with a jacking spring (17), and the outer surface of the rotating shaft (4) and positioned below the impeller (6) are fixedly connected with a rotating blade (18);

the two sides of the inner wall of the pump pipe (1) are fixedly connected with stop blocks (22), one opposite side of the two stop blocks (22) is rotatably connected with a second filter plate (23), a connecting sleeve (24) penetrates through the top of the second filter plate (23), the inner surface of the connecting sleeve (24) is rotatably connected with the outer surface of the rotating shaft (4), the top of the first filter plate (8) is fixedly connected with a rotating sleeve (25), the bottom of the rotating sleeve (25) penetrates through the first filter plate (8) and extends to the outside of the first filter plate (8), the inner surface of the rotating sleeve (25) is rotatably connected with a fixing rod (26), the bottom end of the fixing rod (26) penetrates through the second filter plate (23) and extends to the outside of the second filter plate (23), and the outer surface of the fixing rod (26) is matched with the inner surface of the rotating sleeve (25);

the bottom end of the rotating shaft (4) is provided with a storage cavity (27), the outer surface of the fixed rod (26) is connected with the inner surface of the storage cavity (27) in a sliding way, the top end of the fixed rod (26) is fixedly connected with a compression spring (28), the top end of the compression spring (28) is fixedly connected with a concave block (29), the two sides of the top of the concave block (29) are fixedly connected with a first connecting block (30), both sides of the article placing cavity (27) are provided with through cavities (31), both sides of the top of the inner cavity of the article placing cavity (27) are connected with second connecting blocks (32) in a sliding manner, the outer surface of the first connecting block (30) is rotatably connected with a swinging rod (33) through a connecting shaft, one end of the swinging rod (33) is rotationally connected with the second connecting block (32) through a connecting shaft, both sides of the outer surface of the rotating shaft (4) are fixedly connected with brush hair rods (34).

2. The multistage impeller axial flow pump for agricultural machinery according to claim 1, characterized in that: the internal surface of ladder groove (11) and the surface sliding connection of stopper (16) to the surface of stopper (16) and the internal surface looks adaptation of sliding tray (14), two top and the equal fixedly connected with in below that one side was kept away from relatively in sliding block (10) decide piece (19), two it all rotates in one side relatively to decide piece (19) and is connected with minor axis (20), two fixedly connected with pull rod (21) between one side that minor axis (20) are relative.

3. The multistage impeller axial flow pump for agricultural machinery according to claim 2, characterized in that: the outer surface swing joint of dead lever (26) has ejector pin (35), the equal fixedly connected with spacing axle (36) in both sides around ejector pin (35), stroke groove (37) have all been seted up to the both sides of ejector pin (35) to keyway (38) have been seted up to the bottom of ejector pin (35), the internal surface of keyway (38) and the surface sliding connection of dead lever (26), the surface of spacing axle (36) and the internal surface sliding connection of stroke groove (37).

4. The multistage impeller axial flow pump for agricultural machinery according to claim 3, characterized in that: one side fixedly connected with gland (39) of pump line (1) inner wall, the top of gland (39) runs through pump line (1) and extends to the outside of pump line (1), the bottom fixedly connected with rubber bearing (40) of gland (39) inner chamber, the bottom of rubber bearing (40) runs through gland (39) and extends to the outside of gland (39), the inside of gland (39) is provided with filler (41), the top threaded connection of gland (13) of gland (39).

5. The multistage impeller axial flow pump for agricultural machinery according to claim 4, characterized in that: the outer surface of the rotating shaft (4) is rotatably connected with the interior of the packing gland (13), and the inner surface of the rotating shaft (4) is fixedly connected with the inner surface of the rubber bearing (40).

6. The multistage impeller axial flow pump for agricultural machinery according to claim 5, characterized in that: the working principle of the multistage impeller axial flow pump for the agricultural machinery comprises the following steps:

the method comprises the following steps: firstly, the pull rod (21) is rotated through the short shaft (20) between the two fixed blocks (19), the two pull rods (21) are pulled, so that the two sliding blocks (10) move towards one side which is relatively far away, at the moment, the convex block (9) slides on the inner surface of the stepped groove (11), then the fixed rod (26) and the ejector rod (35) are aligned with the inside of the rotating sleeve (25) on the first filter plate (8), the fixed sleeve (7) is sleeved at the bottom end of the pump pipe (1), at the moment, the limiting rod (15) is pulled upwards, so that the limiting block (16) is positioned inside the sliding groove (14), at the same time, the jacking spring (17) is in a compressed state, then the two sliding blocks (10) slide towards the opposite side by pushing the pull rod (21) and are contacted with the outer surface of the pump pipe (1), then the limiting rod (15) is loosened, and under the action of the jacking spring (17), the limiting block (16) slides to the inner surface of the stepped groove (11) from the inner surface of the sliding groove (14), one side of the limiting block (16) is contacted with one side of the convex block (9), and then the pull rod (21) is rotated, so that the pull rod (21) is contacted with the outer surface of the sliding block (10);

step two: the fixing rod (26) is pressed down, so that the fixing rod (26) slides in the storage cavity (27), the compression spring (28) is compressed, the fixing rod (26) pushes the concave blocks (29) to move upwards, the swinging rods (33) on the two first connecting blocks (30) swing, the two second connecting blocks (32) are further pushed to slide towards the side which is relatively far away from the inside of the through cavity (31) until the two second connecting blocks (32) prop against the connecting sleeve (24), then the fixing rod (26) is rotated, the rotating sleeve (25) drives the second filter plate (23) to rotate, the ejector rod (35) is rotated, the ejector rod (35) is in a horizontal state, the ejector rod (35) is pushed, the fixing rod (26) slides on the inner surface of the key groove (38), and the limiting shaft (36) slides on the inner surface of the stroke groove (37), at the moment, the mandril (35) is contacted with the rotating sleeve (25);

step three: then with motor (3) and external power source electric connection, the rotation of motor (3), drive axis of rotation (4) and rotate, further drive impeller (6) on axis of rotation (4), stator (5), rotary blade (18) and brush hair pole (34) rotate, thereby carry water, when carrying, pasture and water are kept off the surface at first filter (8) and second filter (23), brush hair pole (34) simultaneously wash the impurity and the earth on first filter (8) and second filter (23) surface, after part weeds get into the inside of pump line (1), cut off weeds through pivoted rotary blade (18);

step four: the water in the pump pipe (1) is blocked by the rubber bearing (40), the filler (41) in the filler box (39) blocks the water in the pump pipe (1), and the water flows out from the top end of the pump pipe (1).