CN113898586A

CN113898586A - Liquid filling-free low-cavitation centrifugal pump

Info

Publication number: CN113898586A
Application number: CN202110946730.0A
Authority: CN
Inventors: 许青华; 陆成
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-01-07

Abstract

The invention provides a liquid filling-free low-cavitation centrifugal pump, which comprises a base, wherein the left side of the upper end of the base is fixedly connected with a pump shell, a gear box is fixedly connected right above a left cavity of the pump shell, a hose is fixedly connected with the inner wall below the left cavity of the pump shell, a clamping mechanism is arranged between the outer surface of the hose and the inner wall of the pump shell, a supporting block is fixedly connected on the right side of the upper end of the base, a motor is fixedly connected above the supporting block, a primary rotating shaft is fixedly connected with an output shaft of the motor, a fixing plate is fixedly connected on the left side of the outer surface of the pump shell, a protective cover is fixedly connected above the fixing plate, a blanking mechanism is arranged in the protective cover, the centrifugal pump is operated without manually filling liquid into the shell and a water inlet pipe when the centrifugal pump is started, and the centrifugal pump can automatically fertilize crops, thereby saving time, reducing labor force and improving working efficiency.

Description

Liquid filling-free low-cavitation centrifugal pump

Technical Field

The invention belongs to the technical field of centrifugal pumps, and particularly relates to a liquid filling-free low-cavitation centrifugal pump.

Background

Centrifugal pumps operate by causing centrifugal motion to a liquid by rotation of an impeller. Before the centrifugal pump is started, the shell and the water inlet pipe are filled with liquid, then the motor is started, the pump shaft drives the impeller and the liquid to rotate at a high speed, the liquid is thrown to the outer edge of the impeller in a centrifugal motion, and flows into a water pressing pipeline of the water pump through a flow channel of the volute pump shell; the patent numbers are: CN109404297B discloses a liquid filling-free low cavitation centrifugal pump, which comprises a pump body; the water pump further comprises an impeller, a swing unit, a first plate, an elliptical disc, a water inlet pipe, a water outlet pipe, a motor and a controller, wherein one side of the pump body is communicated with the water inlet pipe, and the top of the pump body is communicated with the water outlet pipe; the impeller is positioned in the pump body and sleeved on the outer ring of the motor output shaft; the elliptic disc is fixedly connected with the end part of the motor output shaft and is provided with a plurality of first holes; the swinging unit comprises an arc-shaped plate, a fixed column and a fixed rod; the fixed column is hinged on the left side wall of the pump body; one end of the fixed rod is fixedly connected to the fixed column through a spring, and the other end of the fixed rod is hinged to the arc-shaped plate; the end part of the arc-shaped plate is hinged to the left side wall of the pump body, and the end face of the arc-shaped plate is in contact with the top of the long half shaft of the elliptical disk in an initial state.

Present farmland need fertilize crops in advance at the in-process of irrigating, can not irrigate fertilizer directness and water misce bene, and present centrifugal pump need be full of liquid earlier in casing and the inlet pipe of centrifugal pump just can the starter motor, extrude liquid from the outlet pipe, during the in-service use, need manually with the casing and the interior physical power that is full of liquid can waste very long time of inlet pipe, and simultaneously, produce a certain amount of bubbles and easily cause cavitation to the impeller after the liquid vaporization, thereby influence the life of centrifugal pump.

Disclosure of Invention

The invention aims to provide a liquid-filling-free low-cavitation centrifugal pump, which aims to solve the specific problems that crops need to be fertilized in advance in the irrigation process of the existing farmland, fertilizers cannot be directly and uniformly mixed with water for irrigation, a motor can be started only by filling liquid into a shell and a water inlet pipe of the existing centrifugal pump, the liquid is pressed out from a water outlet pipe, the shell and the water inlet pipe are manually filled with the liquid during actual use, long-time physical strength is wasted, and meanwhile, a certain amount of bubbles generated after the liquid is vaporized easily cause cavitation to an impeller, so that the service life of the centrifugal pump is influenced.

In order to achieve the purpose, the invention provides the following technical scheme:

a liquid-filling-free low-cavitation centrifugal pump comprises a base, wherein the left side of the upper end of the base is fixedly connected with a pump shell, a gear box is fixedly connected right above a left cavity of the pump shell, a hose is fixedly connected to the inner wall of the lower part of the left cavity of the pump shell, a clamping mechanism is arranged between the outer surface of the hose and the inner wall of the pump shell, a supporting block is fixedly connected to the right side of the upper end of the base, a motor is fixedly connected to the upper part of the supporting block, a primary rotating shaft is fixedly connected to an output shaft of the motor, the other end of the primary rotating shaft penetrates through the inner wall of the pump shell and extends to the inside of the gear box, a primary bevel gear is fixedly connected to the inner wall of the gear box, a primary sealing ring is sleeved on the outer surface of the primary rotating shaft, the outer surface of the primary sealing ring is fixedly connected with the inner wall of the right side of the pump shell, and an impeller is fixedly connected to the outer surface of the primary rotating shaft and positioned in the right cavity of the pump shell, the meshing of one-level bevel gear's upper left side has second grade bevel gear, second grade bevel gear's inner wall fixedly connected with second grade pivot, the one end of second grade pivot runs through the lower extreme surface and the fixedly connected with hob of gear box, the other end of second grade pivot runs through the upper end surface of gear box and extends to the tertiary bevel gear of outside fixedly connected with of pump case, the surface left side fixedly connected with fixed plate of pump case, the top fixedly connected with safety cover of fixed plate, be provided with unloading mechanism in the safety cover.

By adopting the technical scheme, when a user needs to irrigate a farmland, the middle inner wall of the hose is reduced and is in sliding connection with the outer surface of the spiral rod through the clamping mechanism, then the motor is started, the motor drives the first-stage rotating shaft to rotate, the first-stage rotating shaft drives the impeller and the first-stage bevel gear to rotate, the first-stage bevel gear drives the second-stage bevel gear to rotate, so that the spiral rod rotates to pump water at the lower end of the hose to the upper end of the hose, after the left chamber of the pump shell is filled with water, the impeller can extrude the water out of the right chamber of the pump shell through centrifugal force, then the hose is loosened through the clamping mechanism, the hose is restored to the original state through the extrusion of the water, meanwhile, the fertilizer is slowly added into the pump shell through the spiral rod, the fertilizer and the water are uniformly stirred, the fertilizer can be fully dissolved into the water, the shell and the water inlet pipe are not required to be manually filled with the liquid, and then the centrifugal pump is operated, thereby saving time and reducing labor force.

Preferably, tertiary bevel gear's surface engagement has level four bevel gear, level four bevel gear's the tertiary pivot of inner wall fixedly connected with, the both ends of tertiary pivot are connected with the inner wall rotation of safety cover, the surface of tertiary pivot is close to the five-level bevel gear of left side fixedly connected with of safety cover, five-level bevel gear's surface engagement has six level bevel gear, six level bevel gear's inner wall fixedly connected with level four pivot, the one end of level four pivot is connected with the upper end inner wall rotation of safety cover, the other end fixedly connected with cam of level four pivot, the right side and the blanking structure sliding connection of cam.

Through adopting above-mentioned technical scheme, drive level four bevel gear through setting up tertiary bevel gear and rotate, level four bevel gear drives five-level bevel gear through tertiary pivot and rotates, and five-level bevel gear drives six-level bevel gear and rotates, and six-level bevel gear drives the cam through level four pivot and rotates and provide power for unloading mechanism.

Preferably, the clamping mechanism comprises a clamping plate, a first-stage groove is formed in the middle position of one side of the clamping plate, a second-stage groove is formed in the inner wall of the first-stage groove and located in the middle position, a rack is fixedly connected to the upper end of the inner wall of the first-stage groove, a through hole is formed in the left side of the clamping plate, the diameter of the through hole is equal to the height of the second-stage groove, the central axes of the through hole and the second-stage groove are perpendicular to each other, the clamping plate is annularly sleeved on the outer surface of the hose, the second-stage groove faces one side of the hose, a gear is meshed with the outer surface of the rack, a transmission shaft is fixedly connected to the inner surface of the gear, a limiting block is fixedly connected to the outer surface of the transmission shaft, the outer surface of the limiting block is movably connected with the outer surface of the clamping plate, a threaded rod is fixedly connected to the other end of the transmission shaft, and a handle is fixedly connected to the outer surface of the pump shell, the outer surface of the threaded rod is in threaded connection with the inner wall of the pump shell, a ratchet wheel is fixedly connected to the outer surface of the threaded rod and located on the outer side of the pump shell, a pawl is fixedly connected to the outer surface of the pump shell and located above the ratchet wheel, and the ratchet wheel is matched with the pawl.

By adopting the technical scheme, when the hose needs to be clamped, the threaded rod is driven to rotate by rotating the handle, the threaded rod drives the transmission shaft to rotate, the transmission shaft drives the gear to rotate, the clamping plate can be driven to wind around the outer surface of the hose by the mutual meshing of the gear and the rack in the clamping plate, the hose is clamped on the outer surface of the screw rod by the clamping plate, then the threaded rod is locked by the matching of the ratchet wheel and the pawl, and the threaded rod is prevented from being reversed under the extrusion of water, so that the clamping effect is lost; when the hose is not required to be clamped, the ratchet wheel is disengaged from the pawl, the handle is rotated reversely, so that the clamping plate is loosened, and the hose is restored to the original state through the extrusion of water.

Preferably, the blanking mechanism comprises a material box, a bottom cover, a rotary disc, a C-shaped plate, a primary crank, a supporting plate, a rotary wheel, a connecting rod, a torsion spring, a secondary crank, a T-shaped plate, a cam and a blanking block, the material box is of a hollow structure, the bottom cover is hinged to the left side of the lower portion of the material box, fixing frames are arranged on the front side and the rear side of the material box, the other end of each fixing frame is fixedly connected with the outer surface of the pump shell, the rotary disc is rotatably connected to the lower portion of the front end of the material box, the disc is fixedly connected to the right side of the rotary disc, the C-shaped plate is slidably connected to the left side of the rotary disc, the lower end of the C-shaped plate is fixedly connected with the bottom cover, the primary crank is slidably connected to the upper portion of the left side of the rotary disc, the rotary wheel is fixedly connected with the rotary wheel, the rotary wheel is provided with two rotary wheels, the inner portion of the rotary wheel is of a hollow structure, the connecting rod is fixedly connected with the inner wall of the rotary wheel, the both ends swing joint of connecting rod has the backup pad, two the relative one side inner wall of backup pad is provided with the torsional spring, the inner wall of torsional spring is connected with the fixed surface of connecting rod, the lower extreme of backup pad and the upper end fixed connection of fixed plate, the rear side the fixed surface of runner is connected with the second grade crank, the articulate other end fixedly connected with T template of second grade, the articulate one side of second grade and cam sliding connection are kept away from to the T template.

By adopting the technical scheme, when crops need to be fertilized, the T-shaped plate is extruded by the cam to drive the second-stage crank to swing, the second-stage crank drives the left runner to rotate, the left runner drives the right runner to synchronously rotate through the connecting rod, the right runner drives the first-stage crank to swing up and down, the first-stage crank enables the turntable to swing left and right through sliding on the outer surface of the turntable, the left end of the turntable slides along the inner side of the C-shaped plate to enable the C-shaped plate to swing back and forth, the C-shaped plate drives the bottom cover to shake up and down to shake the fertilizer out of the inside of the feed box, and the fertilizer can be prevented from being solidified in the feed box through shaking of the bottom cover; the weight of the two sides of the turntable can be different by arranging the disc, so that the turntable is ensured to be restored to the original state after losing the acting force of the primary crank; the T-shaped plate can be guaranteed to be matched with the cam all the time by arranging the torsion spring.

Preferably, a blanking block is fixedly connected to the upper portion of the right side of the fixing plate, a chute which is inclined downwards is formed in the upper end of the blanking block, a feeding hole is formed in the outer surface of the pump shell and located on the right side of the chute, and a manual valve is arranged at the feeding hole.

Through adopting above-mentioned technical scheme, can add fertilizer in the pump case from the feed inlet through setting up the blanking piece, can guarantee that the left cavity of pump case is in encapsulated situation when the centrifugal pump does not go out water through setting up manual valve.

Preferably, the upper and lower both ends and the right side of the inner wall of gear box have all been seted up the one-level bearing groove, the inner wall fixedly connected with one-level bearing in one-level bearing groove is located the outer fixed surface of the inner wall of the one-level bearing of both sides and second grade pivot about the gear box is connected, is located the inner wall of the one-level bearing on gear box right side and the outer fixed surface of one-level pivot are connected, the upper and lower both ends and the right side of the surface of gear box all are equipped with the second grade sealing washer, the surface at one-level pivot and second grade pivot is established respectively to the second grade sealing washer cover.

Through adopting above-mentioned technical scheme, can protect the inside mechanism of gear box not receive the corruption of water through setting up the gear box, can reduce the wearing and tearing of one-level pivot and second grade pivot through setting up the one-level bearing, can strengthen the leakproofness of gear box through setting up the second grade sealing washer.

Preferably, the second grade bearing groove has all been seted up to both sides and top position about the inner wall of safety cover, the inner wall fixedly connected with second grade bearing in second grade bearing groove is located the outer fixed surface of the inner wall of the second grade bearing of the safety cover left and right sides and tertiary pivot is connected, is located the inner wall of the second grade bearing of safety cover top and the outer fixed surface of level four pivot are connected, the front end of safety cover is provided with the door that opens and shuts, the outer fixed surface who opens and shuts the door is connected with the handle.

Through adopting above-mentioned technical scheme, can play the effect of protection to inner structure through setting up the safety cover, through setting up the feed box of being convenient for of opening and shutting door and applying fertilizer, be convenient for open and close the door through setting up the handle.

Preferably, the outer surface of the primary rotating shaft is fixedly connected with a fan blade, one side, close to the impeller, of the outer surface of the fan blade is provided with a plurality of steel needles, and the fan blade is made of an anti-cavitation steel material.

Through adopting above-mentioned technical scheme, can get up the bubble gathering that the impeller left side produced through setting up the flabellum, water is direct when preventing to take place the cavitation phenomenon strikes the impeller surface, can carry out the breakage to the bubble through setting up the steel needle, prevents that the bubble is too much and influence the normal operating of impeller, can effectual improvement impeller's life.

Preferably, the tooth profiles of the gears are helical teeth, and the clamping plates and the racks are made of elastic materials.

Through adopting above-mentioned technical scheme, the profile shape through setting up the gear is the skewed tooth, can be so that the better meshing of gear and rack, adopts elastic material through the material that sets up splint and rack, can make splint and rack bending deformation can take place in the coiling, prevents splint and rack fracture when coiling.

Preferably, the hose is made of elastic wear-resistant materials.

Through adopting above-mentioned technical scheme, adopt elasticity wear-resisting material through the material that sets up the hose, can guarantee that the hose can not split when tensile to it is not fragile when mutually supporting with the hob.

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, when a user needs to irrigate a farmland, the middle inner wall of the hose is shrunk and is in sliding connection with the outer surface of the spiral rod through the clamping mechanism, then the motor is started, the motor drives the first-stage rotating shaft to rotate, the first-stage rotating shaft drives the impeller and the first-stage bevel gear to rotate, the first-stage bevel gear drives the second-stage bevel gear to rotate, so that the spiral rod rotates to pump water at the lower end of the hose to the upper end of the hose, after the left chamber of the pump shell is filled with water, the impeller can extrude the water out of the right chamber of the pump shell through centrifugal force, then the hose is loosened through the clamping mechanism, the hose is restored to the original state through the extrusion of the water, meanwhile, the blanking mechanism can slowly add fertilizer into the pump shell, the fertilizer and the water are uniformly stirred through the spiral rod, the fertilizer can be fully dissolved into the water, the shell and the water inlet pipe are not required to be manually filled with liquid, and then the centrifugal pump is operated, moreover, crops can be automatically fertilized, so that the time can be saved, the labor force is reduced, and the working efficiency is improved.

2. According to the hose clamping device, when a hose needs to be clamped, the threaded rod is driven to rotate by the rotating handle, the threaded rod drives the transmission shaft to rotate, the transmission shaft drives the gear to rotate, the gear is meshed with the rack in the clamping plate to drive the clamping plate to wind around the outer surface of the hose, the hose is clamped on the outer surface of the spiral rod through the clamping plate, then the threaded rod is locked through the matching of the ratchet wheel and the pawl, and the threaded rod is prevented from being reversed under the extrusion of water so that the clamping effect is lost; when the hose is not required to be clamped, the ratchet wheel is disengaged from the pawl, the handle is rotated reversely, so that the clamping plate is loosened, and the hose is restored to the original state through the extrusion of water.

3. According to the fertilizer applying device, when crops need to be fertilized, the T-shaped plate is extruded through the cam to drive the second-stage crank to swing, the second-stage crank drives the left-side runner to rotate, the left-side runner drives the right-side runner to synchronously rotate through the connecting rod, the right-side runner drives the first-stage crank to swing up and down, the first-stage crank enables the turntable to swing left and right through sliding on the outer surface of the turntable, the left end of the turntable slides along the inner side of the C-shaped plate to enable the C-shaped plate to swing back and forth, the C-shaped plate drives the bottom cover to shake up and down to shake out fertilizer from the interior of the material box, and the fertilizer can be prevented from being solidified in the material box through shaking of the bottom cover; the disc is arranged, so that the turntable can be ensured to be restored to the original state after the acting force of the primary crank is lost; the T-shaped plate can be guaranteed to be matched with the cam all the time by arranging the torsion spring.

4. According to the invention, the air bubbles generated on the left side of the impeller can be gathered by arranging the fan blades, so that the direct impact of water on the surface of the impeller when the cavitation phenomenon occurs is prevented, the air bubbles can be crushed by arranging the steel needle, the influence on the normal operation of the impeller caused by excessive air bubbles is prevented, and the service life of the impeller can be effectively prolonged.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic front sectional view of the present invention;

FIG. 3 is a schematic structural view of the blanking mechanism of the present invention;

FIG. 4 is a schematic side view of the blanking mechanism of the present invention;

FIG. 5 is a schematic structural view of a clamping mechanism of the present invention;

FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 5 according to the present invention;

FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 4 according to the present invention;

fig. 8 is a schematic structural view of the splint of the present invention.

In the figure: base 1, supporting block 2, motor 3, pump case 4, primary sealing ring 5, blanking mechanism 6, bin 601, bottom cover 602, turntable 603, disk 604, C-shaped plate 605, primary crank 606, supporting plate 607, runner 608, connecting rod 609, torsion spring 610, secondary crank 611, T-shaped plate 612, cam 613, blanking block 614, clamping mechanism 7, clamping plate 71, primary groove 711, secondary groove 712, through hole 713, rack 72, gear 73, threaded rod 74, transmission shaft 75, handle 76, limiting block 77, impeller 8, primary rotating shaft 9, gear box 10, primary bearing groove 101, primary bearing 102, secondary sealing ring 103, primary bevel gear 11, secondary bevel gear 12, secondary rotating shaft 13, threaded rod 14, tertiary bevel gear 15, quaternary bevel gear 16, tertiary rotating shaft 17, quinary bevel gear 18, quinary bevel gear 19, quaternary rotating shaft 20, protective cover 21, secondary bearing groove 211, secondary bevel gear 12, secondary rotating shaft 13, screw rod 14, quaternary bevel gear 15, quaternary bevel gear 16, tertiary rotating shaft 17, quinary bevel gear 18, quinary bevel gear 19, quaternary shaft 20, quinary bevel gear 19, quaternary shaft 20, protective cover 21, secondary bearing groove, The two-stage bearing 212, the fixing plate 22, the fixing frame 23, the hose 24, the fan blade 25, the steel needle 251, the manual valve 26, the ratchet 27, the pawl 28, the opening and closing door 29 and the handle 30.

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, in an embodiment of the present invention, a liquid filling-free low cavitation centrifugal pump includes a base 1, a pump casing 4 is fixedly connected to the left side of the upper end of the base 1, a gear box 10 is fixedly connected to the right upper side of the left chamber of the pump casing 4, a hose 24 is fixedly connected to the lower inner wall of the left chamber of the pump casing 4, a clamping mechanism 7 is disposed between the outer surface of the hose 24 and the inner wall of the pump casing 4, a supporting block 2 is fixedly connected to the right side of the upper end of the base 1, a motor 3 is fixedly connected to the upper side of the supporting block 2, an output shaft of the motor 3 is fixedly connected to a primary rotating shaft 9, the other end of the primary rotating shaft 9 penetrates through the inner wall of the pump casing 4 and extends to the inside of the gear box 10 and is fixedly connected to a primary bevel gear 11, a primary sealing ring 5 is sleeved on the outer surface of the primary rotating shaft 9, the outer surface of the primary sealing ring 5 is fixedly connected to the right inner wall of the pump casing 4, an impeller 8 is fixedly connected to the outer surface of the primary rotating shaft 9 and located in the right chamber of the pump casing 4, the meshing of the upper left side of one-level bevel gear 11 has second grade bevel gear 12, the inner wall fixedly connected with second grade pivot 13 of second grade bevel gear 12, the lower extreme surface and the fixedly connected with hob 14 of gear box 10 are run through to the one end of second grade pivot 13, the other end of second grade pivot 13 runs through the upper end surface of gear box 10 and extends to the tertiary bevel gear 15 of outside fixedly connected with of pump case 4, the surface left side fixedly connected with fixed plate 22 of pump case 4, the top fixedly connected with safety cover 21 of fixed plate 22, be provided with unloading mechanism 6 in the safety cover 21.

By adopting the technical scheme, when a user needs to irrigate a farmland, the middle inner wall of the hose 24 is reduced through the clamping mechanism 7 and is in sliding connection with the outer surface of the spiral rod 14, then the motor 3 is started, the motor 3 drives the first-stage rotating shaft 9 to rotate, the first-stage rotating shaft 9 drives the impeller 8 and the first-stage bevel gear 11 to rotate, the first-stage bevel gear 11 drives the second-stage bevel gear 12 to rotate, so that the spiral rod 14 rotates to pump water at the lower end of the hose 24 to the upper end of the hose 24, after the left chamber of the pump shell 4 is filled with water, the impeller 8 extrudes the water out from the right chamber of the pump shell 4 through centrifugal force, then the hose 24 is loosened through the clamping mechanism 7, the hose 24 is restored to the original state through the extrusion of the water, meanwhile, the blanking mechanism 6 can slowly add fertilizer into the pump shell 4, the fertilizer and the water are uniformly stirred through the spiral rod 14, so that the fertilizer can be fully dissolved in the water, the centrifugal pump does not need to be operated after the shell and the water inlet pipe are filled with liquid manually, so that the time can be saved, and the labor force is reduced.

As an embodiment of the invention, a four-stage bevel gear 16 is meshed with the outer surface of a three-stage bevel gear 15, a three-stage rotating shaft 17 is fixedly connected to the inner wall of the four-stage bevel gear 16, two ends of the three-stage rotating shaft 17 are rotatably connected with the inner wall of a protective cover 21, a five-stage bevel gear 18 is fixedly connected to the left side, close to the protective cover 21, of the outer surface of the three-stage rotating shaft 17, a six-stage bevel gear 19 is meshed with the outer surface of the five-stage bevel gear 18, a four-stage rotating shaft 20 is fixedly connected to the inner wall of the six-stage bevel gear 19, one end of the four-stage rotating shaft 20 is rotatably connected with the inner wall of the upper end of the protective cover 21, a cam 613 is fixedly connected to the other end of the four-stage rotating shaft 20, and the right side of the cam 613 is slidably connected with a blanking structure.

By adopting the technical scheme, the three-level bevel gear 15 is arranged to drive the four-level bevel gear 16 to rotate, the four-level bevel gear 16 drives the five-level bevel gear 18 to rotate through the three-level rotating shaft 17, the five-level bevel gear 18 drives the six-level bevel gear 19 to rotate, and the six-level bevel gear 19 drives the cam 613 to rotate through the four-level rotating shaft 20 to provide power for the blanking mechanism 6.

As an embodiment of the present invention, the clamping mechanism 7 includes a clamping plate 71, a first-stage groove 711 is formed in a middle position of one side of the clamping plate 71, a second-stage groove 712 is formed in an inner wall of the first-stage groove 711 and located in a middle position, a rack 72 is fixedly connected to an upper end of the inner wall of the first-stage groove 711, a through hole 713 is formed in a left side of the clamping plate 71, a diameter of the through hole 713 is equal to a height of the second-stage groove 712, central axes of the through hole 713 and the second-stage groove 712 are perpendicular to each other, the clamping plate 71 is annularly sleeved on an outer surface of the hose 24, the second-stage groove 712 faces one side of the hose 24, a gear 73 is engaged with an outer surface of the rack 72, a transmission shaft 75 is fixedly connected to an inner surface of the gear 73, a stopper 77 is fixedly connected to the outer surface of the transmission shaft 75, the outer surface of the stopper 77 is movably connected to the outer surface of the clamping plate 71, a threaded rod 74 is fixedly connected to the other end of the transmission shaft 75, the other end of the threaded rod 74 penetrates through an outer surface of the pump housing 4 and is fixedly connected to a handle 76, the outer surface of the threaded rod 74 is in threaded connection with the inner wall of the pump shell 4, the ratchet 27 is fixedly connected to the outer surface of the threaded rod 74 and located on the outer side of the pump shell 4, the pawl 28 is fixedly connected to the outer surface of the pump shell 4 and located above the ratchet 27, and the ratchet 27 is matched with the pawl 28.

By adopting the technical scheme, when the hose 24 needs to be clamped, the threaded rod 74 is driven to rotate by rotating the handle 76, the threaded rod 74 drives the transmission shaft 75 to rotate, the transmission shaft 75 drives the gear 73 to rotate, the gear 73 and the rack 72 in the clamping plate 71 are meshed with each other to drive the clamping plate 71 to wind around the outer surface of the hose 24, the hose 24 is clamped on the outer surface of the screw rod 14 through the clamping plate 71, then the threaded rod 74 is locked through the matching of the ratchet wheel 27 and the pawl 28, and the threaded rod 74 is prevented from being reversed under the extrusion of water so as not to lose the clamping effect; when it is not desired to clamp the hose 24, the hose 24 is returned to its original condition by squeezing the water by disengaging the ratchet 27 from the pawl 28 and rotating the handle 76 in the reverse direction to release the clamp 71.

As an embodiment of the invention, the blanking mechanism 6 comprises a feed box 601, a bottom cover 602, a rotating disc 603, a disc 604, a C-shaped plate 605, a primary crank 606, a supporting plate 607, a rotating wheel 608, a connecting rod 609, a torsion spring 610, a secondary crank 611, a T-shaped plate 612, a cam 613 and a blanking block 614, the feed box 601 is of a hollow structure, the bottom cover 602 is hinged to the left side below the feed box 601, fixed frames 23 are arranged on the front and back sides of the feed box 601, the other end of the fixed frame 23 is fixedly connected with the outer surface of the pump shell 4, the rotating disc 603 is rotatably connected to the lower position of the front end of the feed box 601, the disc 604 is fixedly connected to the right side of the rotating disc 603, the C-shaped plate 605 is slidably connected to the left side of the rotating disc 603, the lower end of the C-shaped plate 605 is fixedly connected with the bottom cover 602, the primary crank 606 is slidably connected to the upper side of the left side of the rotating disc 603, the rotating wheel 608 is fixedly connected with the rotating wheel 608, two rotating wheels 608, the inside of runner 608 sets up to hollow structure, the inner wall fixedly connected with connecting rod 609 of runner 608, the both ends swing joint of connecting rod 609 has backup pad 607, the inner wall of one side that two backup pads 607 are relative is provided with torsional spring 610, the inner wall of torsional spring 610 and the outer fixed surface of connecting rod 609 are connected, the lower extreme of backup pad 607 and the upper end fixed connection of fixed plate 22, the outer fixed surface of rear side runner 608 is connected with second grade crank 611, the other end fixedly connected with T template 612 of second grade crank 611, one side that second grade crank 611 was kept away from to T template 612 and cam 613 sliding connection.

By adopting the technical scheme, when crops need to be fertilized, the T-shaped plate 612 is extruded by the cam 613 to drive the secondary crank 611 to swing, the secondary crank 611 drives the left runner 608 to rotate, the left runner 608 drives the right runner 608 to synchronously rotate through the connecting rod 609, the right runner 608 drives the primary crank 606 to swing up and down, the primary crank 606 slides on the outer surface of the turntable 603 to enable the turntable 603 to swing left and right, the left end of the turntable 603 slides along the inner side of the C-shaped plate 605 to enable the C-shaped plate 605 to swing back and forth, the C-shaped plate 605 drives the bottom cover 602 to shake up and down to shake the fertilizer out of the inside of the feed box 601, and the fertilizer can be prevented from being solidified in the feed box 601 through the shaking of the bottom cover 602; the weight of the two sides of the turntable 603 can be different by arranging the disc 604 to ensure that the turntable 603 is restored to the original state after losing the acting force of the primary crank 606; the provision of the torsion spring 610 ensures that the T-shaped plate 612 always co-operates with the cam 613.

As an embodiment of the present invention, a blanking block 614 is fixedly connected to the upper portion of the right side of the fixing plate 22, an inclined downward chute is formed at the upper end of the blanking block 614, a feeding port is formed on the outer surface of the pump housing 4 and located on the right side of the chute, and a manual valve 26 is disposed at the feeding port.

By adopting the technical scheme, fertilizer can be added into the pump shell 4 from the feed inlet by arranging the blanking block 614, and the left chamber of the pump shell 4 can be ensured to be in a sealed state when the centrifugal pump does not discharge water by arranging the manual valve 26.

As an embodiment of the invention, the upper end, the lower end and the right side of the inner wall of the gear box 10 are both provided with a primary bearing groove 101, the inner wall of the primary bearing groove 101 is fixedly connected with a primary bearing 102, the inner wall of the primary bearing 102 positioned on the upper side and the lower side of the gear box 10 is fixedly connected with the outer surface of the secondary rotating shaft 13, the inner wall of the primary bearing 102 positioned on the right side of the gear box 10 is fixedly connected with the outer surface of the primary rotating shaft 9, the upper end, the lower end and the right side of the outer surface of the gear box 10 are both provided with a secondary sealing ring 103, and the secondary sealing rings 103 are respectively sleeved on the outer surfaces of the primary rotating shaft 9 and the secondary rotating shaft 13.

By adopting the technical scheme, the mechanism inside the gear box 10 can be protected from being corroded by water by arranging the gear box 10, the abrasion of the first-stage rotating shaft 9 and the second-stage rotating shaft 13 can be reduced by arranging the first-stage bearing 102, and the sealing property of the gear box 10 can be enhanced by arranging the second-stage sealing ring 103.

In one embodiment of the present invention, the inner wall of the protective cover 21 is provided with two-stage bearing grooves 211 at both left and right sides and above, the inner wall of the two-stage bearing grooves 211 is fixedly connected with two-stage bearings 212, the inner walls of the two-stage bearings 212 at both left and right sides of the protective cover 21 are fixedly connected with the outer surface of the three-stage rotating shaft 17, the inner wall of the two-stage bearing 212 above the protective cover 21 is fixedly connected with the outer surface of the four-stage rotating shaft 20, the front end of the protective cover 21 is provided with an opening and closing door 29, and the outer surface of the opening and closing door 29 is fixedly connected with a handle 30.

Through adopting above-mentioned technical scheme, can play the effect of protection to inner structure through setting up safety cover 21, be convenient for feeder box 601 to apply fertilizer through setting up the door 29 that opens and shuts, be convenient for open and close the door 29 that opens and shuts through setting up handle 30.

In one embodiment of the present invention, a fan blade 25 is fixedly connected to an outer surface of the primary shaft 9, a plurality of steel pins 251 are disposed on an outer surface of the fan blade 25 near the impeller 8, and the fan blade 25 is made of an anti-cavitation steel material.

Through adopting above-mentioned technical scheme, can gather the bubble that impeller 8 left side produced through setting up flabellum 25, water is direct when preventing to take place the cavitation erosion phenomenon strikes impeller 8 surface, can carry out the breakage to the bubble through setting up steel needle 251, prevents that the bubble is too much and influence impeller 8's normal operating, can effectual improvement impeller 8's life.

In one embodiment of the present invention, the gear 73 has a tooth profile of helical teeth, and the clamping plate 71 and the rack 72 are made of an elastic material.

Through adopting above-mentioned technical scheme, be the skewed tooth through the profile of tooth shape that sets up gear 73, can be so that gear 73 and rack 72 better meshing, adopt elastic material through the material that sets up splint 71 and rack 72, can make splint 71 and rack 72 can take place bending deformation when coiling, prevent splint 71 and rack 72 fracture when coiling.

In one embodiment of the present invention, the hose 24 is made of an elastic wear-resistant material.

Through adopting above-mentioned technical scheme, adopt elasticity wear-resisting material through the material that sets up hose 24, can guarantee that hose 24 can not split when tensile to it is not fragile when mutually supporting with hob 14.

The working principle is as follows: when a user needs to irrigate a farmland, firstly, the threaded rod 74 is driven to rotate by the rotating handle 76, the threaded rod 74 drives the transmission shaft 75 to rotate, the transmission shaft 75 drives the gear 73 to rotate, the gear 73 is meshed with the rack 72 arranged on the inner side of the clamping plate 71 to drive the clamping plate 71 to wind around the outer surface of the hose 24, the hose 24 is clamped on the outer surface of the spiral rod 14 through the clamping plate 71, then the threaded rod 74 is locked by matching of the ratchet wheel 27 and the pawl 28, and the threaded rod 74 is prevented from being reversed under the extrusion of water so as not to lose the clamping effect; when the left chamber of the pump shell 4 is filled with water, the impeller 8 extrudes the water out of the right chamber of the pump shell 4 through centrifugal force, then the ratchet wheel 27 is disengaged from the pawl 28 and the handle 76 is rotated reversely to loosen the clamping plate 71, the hose 24 is restored to the original state through the extrusion of the water, then the motor 3 is started, the motor 3 drives the primary rotating shaft 9 to rotate, the primary rotating shaft 9 drives the impeller 8 and the primary bevel gear 11 to rotate, the primary bevel gear 11 drives the secondary bevel gear 12 to rotate, so that the screw rod 14 rotates to pump the water at the lower end of the hose 24 to the upper end of the hose 24, when the left chamber of the pump shell 4 is filled with water, the impeller 8 extrudes the water out of the right chamber of the pump shell 4 through centrifugal force, then the clamping plate 71 is loosened through disengaging the ratchet wheel 27 from the pawl 28 and reversely rotating the handle 76, and the hose 24 is restored to the original state through the extrusion of the water, meanwhile, the three-stage bevel gear 15 drives the four-stage bevel gear 16 to rotate, the four-stage bevel gear 16 drives the five-stage bevel gear 18 to rotate through the three-stage rotating shaft 17, the five-stage bevel gear 18 drives the six-stage bevel gear 19 to rotate, the six-stage bevel gear 19 drives the cam 613 to rotate through the four-stage rotating shaft 20, the cam 613 extrudes the T-shaped plate 612 to drive the second-stage crank 611 to swing, the second-stage crank 611 drives the left-stage runner 608 to rotate, the left-stage runner 608 drives the right-stage runner 608 to synchronously rotate through the connecting rod 609, the right-stage runner 608 drives the first-stage crank 606 to swing up and down, the first-stage crank 606 enables the turntable 603 to swing left and right through sliding on the outer surface of the turntable 603, the left end of the turntable 603 slides along the inner side of the C-shaped plate 605 to enable the C-shaped plate 605 to swing back and forth, the C-shaped plate 605 drives the bottom cover 602 to shake up and down to shake the fertilizer from the inside of the bin 601 and fall into the falling block 614, when the weight of the manual valve 26 is accumulated, fertilizer enters into pump case 4 from the feed inlet and mixes with water, then through screw rod 14 with fertilizer and water stirring for fertilizer can dissolve the aquatic fully, need not manually with casing and the intraductal centrifugal pump operation of letting behind the liquid that is full of water, and can fertilize crops automatically, thereby can save time, reduce the labour, improve work efficiency.

The technical features of the embodiments may be arbitrarily combined, and for brevity, all possible combinations of the technical features in the embodiments are not described in the above, however, as long as the combinations of the technical features do not exist in the above embodiments, only several embodiments of the present invention are expressed, and the description is more specific and detailed, but the present invention is not limited by the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a exempt from to irritate liquid low cavitation centrifugal pump, includes base (1), its characterized in that: the improved structure of the motor comprises a base (1), a pump shell (4) is fixedly connected to the left side of the upper end of the base (1), a gear box (10) is fixedly connected to the right side of a left cavity of the pump shell (4), a hose (24) is fixedly connected to the inner wall of the lower portion of the left cavity of the pump shell (4), a clamping mechanism (7) is arranged between the outer surface of the hose (24) and the inner wall of the pump shell (4), a supporting block (2) is fixedly connected to the right side of the upper end of the base (1), a motor (3) is fixedly connected to the upper portion of the supporting block (2), a primary rotating shaft (9) is fixedly connected to an output shaft of the motor (3), a primary bevel gear (11) penetrates through the inner wall of the pump shell (4) and extends to the inner portion of the gear box (10), and a primary sealing ring (5) is sleeved on the outer surface of the primary rotating shaft (9), the outer surface of the primary sealing ring (5) is fixedly connected with the inner wall of the right side of the pump shell (4), the outer surface of the primary rotating shaft (9) is fixedly connected with an impeller (8) in a right side cavity of the pump shell (4), the upper left side of the primary bevel gear (11) is meshed with a secondary bevel gear (12), the inner wall of the secondary bevel gear (12) is fixedly connected with a secondary rotating shaft (13), one end of the secondary rotating shaft (13) penetrates through the outer surface of the lower end of the gear box (10) and is fixedly connected with a spiral rod (14), the other end of the secondary rotating shaft (13) penetrates through the outer surface of the upper end of the gear box (10) and extends to the outer side of the pump shell (4) and is fixedly connected with a tertiary bevel gear (15), a fixing plate (22) is fixedly connected with the left side of the outer surface of the pump shell (4), and a protective cover (21) is fixedly connected with the upper side of the fixing plate (22), a blanking mechanism (6) is arranged in the protective cover (21).

2. The non-priming low-cavitation centrifugal pump according to claim 1, characterized in that: the surface engagement of tertiary bevel gear (15) has level four bevel gear (16), the tertiary pivot of inner wall fixedly connected with (17) of level four bevel gear (16), the both ends of tertiary pivot (17) are connected with the inner wall rotation of safety cover (21), the surface of tertiary pivot (17) is close to left side fixedly connected with five-stage bevel gear (18) of safety cover (21), the surface engagement of five-stage bevel gear (18) has six level bevel gear (19), the inner wall fixedly connected with level four pivot (20) of six level bevel gear (19), the one end of level four pivot (20) is connected with the upper end inner wall rotation of safety cover (21), the other end fixedly connected with cam (613) of level four pivot (20), the right side and unloading mechanism (6) sliding connection of cam (613).

3. The non-priming low-cavitation centrifugal pump according to claim 1, characterized in that: the clamping mechanism (7) comprises a clamping plate (71), a first-stage groove (711) is formed in the middle position of one side of the clamping plate (71), a second-stage groove (712) is formed in the inner wall of the first-stage groove (711) and located in the middle position, a rack (72) is fixedly connected to the upper end of the inner wall of the first-stage groove (711), a through hole (713) is formed in the left side of the clamping plate (71), the diameter of the through hole (713) is equal to the height of the second-stage groove (712) and the central axes of the two are perpendicular to each other, the clamping plate (71) is circularly sleeved on the outer surface of the hose (24) and one side of the second-stage groove (712) facing the hose (24), a gear (73) is meshed with the outer surface of the rack (72), a transmission shaft (75) is fixedly connected to the inner surface of the gear (73), and a limiting block (77) is fixedly connected to the outer surface of the transmission shaft (75), the outer surface of stopper (77) and the surface swing joint of splint (71), the other end fixedly connected with threaded rod (74) of transmission shaft (75), the other end of threaded rod (74) runs through surface and the fixedly connected with handle (76) of pump case (4), the outer surface of threaded rod (74) and the inner wall threaded connection of pump case (4), the outer surface of threaded rod (74) just is located outside fixedly connected with ratchet (27) of pump case (4), the outer surface of pump case (4) just is located top fixedly connected with pawl (28) of ratchet (27), ratchet (27) and pawl (28) looks adaptation.

4. The non-priming low-cavitation centrifugal pump according to claim 1, characterized in that: the blanking mechanism (6) comprises a material box (601), a bottom cover (602), a rotary disc (603), a disc (604), a C-shaped plate (605), a primary crank (606), a support plate (607), a rotating wheel (608), a connecting rod (609), a torsion spring (610), a secondary crank (611), a T-shaped plate (612), a cam (613) and a blanking block (614), wherein the material box (601) is arranged to be a hollow structure, the bottom cover (602) is hinged to the left side below the material box (601), fixing frames (23) are arranged on the front side and the rear side of the material box (601), the other end of each fixing frame (23) is fixedly connected with the outer surface of a pump shell (4), the rotary disc (603) is rotatably connected to the lower position of the front end of the material box (601), the disc (604) is fixedly connected to the right side of the rotary disc (603), and the C-shaped plate (605) is slidably connected to the left side of the rotary disc (603), the lower end of the C-shaped plate (605) is fixedly connected with a bottom cover (602), a first-stage crank (606) is connected to the upper portion of the left side of the rotary table (603) in a sliding mode, the other end of the first-stage crank (606) is fixedly connected with two rotating wheels (608), the interior of each rotating wheel (608) is of a hollow structure, a connecting rod (609) is fixedly connected to the inner wall of each rotating wheel (608), supporting plates (607) are movably connected to the two ends of each connecting rod (609), a torsion spring (610) is arranged on the inner wall of one side, opposite to the two supporting plates (607), of each torsion spring (610) is fixedly connected with the outer surface of each connecting rod (609), the lower end of each supporting plate (607) is fixedly connected with the upper end of the fixing plate (22), a second-stage crank (611) is fixedly connected to the outer surface of each rotating wheel (608) on the rear side, and a T-shaped plate (612) is fixedly connected to the other end of each second-stage crank (611), the side of the T-shaped plate (612) far away from the secondary crank (611) is connected with the cam (613) in a sliding way.

5. The non-priming low-cavitation centrifugal pump according to claim 4, characterized in that: a blanking block (614) is fixedly connected to the upper portion of the right side of the fixing plate (22), a chute which is inclined downwards is formed in the upper end of the blanking block (614), a feeding hole is formed in the outer surface of the pump shell (4) and located on the right side of the chute, and a manual valve (26) is arranged at the feeding hole.

6. The non-priming low-cavitation centrifugal pump according to claim 1, characterized in that: one-level bearing groove (101) have all been seted up on the upper and lower both ends and the right side of the inner wall of gear box (10), the inner wall fixedly connected with one-level bearing (102) of one-level bearing groove (101) is located the outer fixed surface of the inner wall of the one-level bearing (102) of both sides and second grade pivot (13) about gear box (10) is connected, is located the outer fixed surface of the inner wall of the one-level bearing (102) on gear box (10) right side and one-level pivot (9) is connected, the upper and lower both ends and the right side of the surface of gear box (10) all are equipped with second grade sealing washer (103), the surface at one-level pivot (9) and second grade pivot (13) is established respectively in second grade sealing washer (103).

7. The non-priming low-cavitation centrifugal pump of claim 2, characterized in that: second grade bearing groove (211) have all been seted up to both sides and top position about the inner wall of safety cover (21), the inner wall fixedly connected with second grade bearing (212) of second grade bearing groove (211) is located the outer fixed surface of the inner wall of the second grade bearing (212) of safety cover (21) left and right sides and tertiary pivot (17) is connected, is located the outer fixed surface of the inner wall of the second grade bearing (212) of safety cover (21) top and level four pivot (20) is connected, the front end of safety cover (21) is provided with door (29) that opens and shuts, the outer fixed surface of door (29) that opens and shuts is connected with handle (30).

8. The non-priming low-cavitation centrifugal pump according to claim 1, characterized in that: the outer surface of the primary rotating shaft (9) is fixedly connected with fan blades (25), one side, close to the impeller (8), of the outer surface of each fan blade (25) is provided with a plurality of steel needles (251), and the fan blades (25) are made of anti-cavitation steel materials.

9. The non-priming low-cavitation centrifugal pump according to claim 3, characterized in that: the tooth profile of the gear (73) is helical, and the clamping plate (71) and the rack (72) are made of elastic materials.

10. The non-priming low-cavitation centrifugal pump according to claim 1, characterized in that: the hose (24) is made of elastic wear-resistant materials.