CN114198319A

CN114198319A - Liquid filling-free low-cavitation centrifugal pump

Info

Publication number: CN114198319A
Application number: CN202111295960.1A
Authority: CN
Inventors: 刘永周; 李文
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-03-18

Abstract

The invention relates to the technical field of centrifugal pumps, in particular to a liquid filling-free low-cavitation centrifugal pump which comprises a pulling mechanism, a water filling mechanism, a spiral mechanism and a cleaning mechanism, wherein a steel wire rope can be driven to pull a rubber ball to move upwards through the rotation of a motor, so that water in a water storage tank can enter a volute through a first connecting pipe, the centrifugal pump is filled with liquid to promote the normal working and running of the centrifugal pump, negative pressure is generated at the center of the centrifugal pump through the rotation of an impeller, the water enters a first shell through a third water inlet pipe, when a filter screen at the bottom of the centrifugal pump is damaged, particle impurities can enter the first shell from a second water inlet pipe under the pushing of a screw rod, the rotation of the screw rod can promote the water to flow into the centrifugal pump and simultaneously drive the particle impurities in the first shell to enter the second shell, the water can enter the second water inlet pipe from a small hole and finally enter the volute, and the effect of protecting the centrifugal pump against the particle impurities can be realized even if the filter screen at the bottom is damaged so as to prevent the particle impurities from entering the volute again, Impurities enter.

Description

Liquid filling-free low-cavitation centrifugal pump

Technical Field

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

Background

Centrifugal pumps operate by causing water to move centrifugally as a result of the rotation of an impeller. Before the water pump is started, the pump shell and the water suction pipe are filled with water, then the motor is started, the pump shaft drives the impeller and the water to rotate at a high speed, the water is thrown to the outer edge of the impeller to be thrown into a water pressure pipeline of the water pump through a flow channel of the volute-shaped pump shell.

The centrifugal pump can normally operate only by filling liquid in the volute when the centrifugal pump is used, if air in the centrifugal pump is small due to the centrifugal force generated after the centrifugal pump rotates at a low density, the liquid cannot be sucked into the centrifugal pump, the centrifugal pump cannot be used for conveying the liquid even if the centrifugal pump is started, and if a filter screen at the bottom of a water inlet pipe of the centrifugal pump is damaged in use, impurity particles can be directly introduced into the centrifugal pump to damage an impeller.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a liquid filling-free low-cavitation centrifugal pump.

The technical scheme adopted by the invention for solving the technical problems is as follows: a liquid-filling-free low-cavitation centrifugal pump comprises a pulling mechanism, a water filling mechanism, a spiral mechanism and a cleaning mechanism, wherein the water filling mechanism is arranged at one end of the pulling mechanism, and the spiral mechanism is arranged at the lower end of the water filling mechanism; the lower end of the spiral mechanism is provided with a cleaning mechanism; can drive wire rope pulling rubber ball upward movement through the motor rotation, water in the aqua storage tank will get into in the spiral case through first connecting pipe like this, thereby make full of liquid in the centrifugal pump promote the centrifugal pump normal work operation, rotate through the impeller and locate the production negative pressure in centrifugal pump center, thereby water gets into first shell through the third inlet tube, when the filter screen damage of centrifugal pump bottom, granule impurity also can get into first shell from the second inlet tube under the promotion of screw rod, the screw rod rotates and can promote rivers to flow and also can drive the granule impurity among the first shell and get into in the second shell in the centrifugal pump simultaneously, and water can get into in the spiral case finally from the aperture entering second inlet tube, even the damage of bottom filter screen also can play the effect of protection centrifugal pump once more and prevent the granule like this, impurity gets into.

Specifically, the pulling mechanism comprises a motor, the motor is fixedly connected with one end of a first transmission shaft, the first transmission shaft is fixedly connected with the middle of a straight gear, the straight gear is tightly attached to the side wall of a rack, the middle of the rack is fixedly connected with a sliding block, the sliding block is fixedly connected with one end of a blocking block, the blocking block is arranged in a sleeve, the side wall of the sleeve is fixedly connected with a support body, the lower end of the support body is fixedly connected with a base, and the upper end of the sliding block is fixedly connected with a steel wire rope; and starting the motor, wherein the motor rotates to drive the first transmission shaft to rotate, the first transmission shaft rotates to drive the straight gear to rotate, and the straight gear rotates to drive the rack to move downwards.

Specifically, the pulling mechanism further comprises a first rotating pin, the steel wire rope is tightly attached to the side wall of the first rotating pin, one end of the first rotating pin is movably connected with the support body, the steel wire rope is tightly attached to the side wall of the second rotating pin, one end of the second rotating pin is movably connected with the water storage tank, one end of the steel wire rope is fixedly connected with the rubber ball, one end of the first transmission shaft is movably connected with the volute, the lower end of the volute is fixedly connected with the base, one end of the first transmission shaft is fixedly connected with the impeller, the side wall of the sliding block is fixedly connected with the support rod, the support rod is fixedly connected with the upper end of the spring, the lower end of the spring is fixedly connected with the fixed block, the fixed block is fixedly connected with the side wall of the support body, and the lower end of the motor is fixedly connected with the base; the rack moves downwards to drive the supporting rod to extrude the spring downwards, so that the spring drives the sliding block to reset when the motor stops rotating, the rack moves downwards to drive the sliding block to move downwards, the sliding block moves downwards to drive the steel wire rope to move downwards, the steel wire rope moves downwards to pull the rubber ball to move upwards, and therefore water in the water storage tank flows into the volute, and the centrifugal pump is filled with liquid to promote normal working operation of the centrifugal pump.

Specifically, the water filling mechanism comprises a first water inlet pipe, one end of the first water inlet pipe is fixedly connected with the side wall of the water storage tank, the side wall inside the water storage tank is fixedly connected with a rubber block, the upper end of the rubber block is tightly attached to a rubber ball, the upper end of the rubber ball is provided with a baffle, the baffle is fixedly connected with the side wall inside the water storage tank, the lower end of the water storage tank is fixedly connected with a first connecting pipe, the lower end of the first connecting pipe is fixedly connected with a volute, and the upper end of the water storage tank is fixedly connected with a water outlet pipe; when the centrifugal pump stops working, the rubber ball blocks the water storage tank, so that certain water is reserved in the water storage tank, and the centrifugal pump is filled with water when the centrifugal pump works next time.

Specifically, the spiral mechanism comprises a second transmission shaft, one end of the second transmission shaft is fixedly connected with the first transmission shaft, the second transmission shaft is arranged inside the bearing, the side wall of the bearing is fixedly connected with a first shell, the side wall of the first shell is provided with a small hole, one end of the second transmission shaft is fixedly connected with the screw rod, one end of the first shell is fixedly connected with a third water inlet pipe, the side wall of the third water inlet pipe is fixedly connected with a second water inlet pipe, the first shell is arranged inside the second water inlet pipe, and one end of the second water inlet pipe is fixedly connected with the volute; first transmission shaft rotates and drives the impeller rotation and produce centrifugal force, makes this kind of water of centrifugal pump center department production negative pressure will follow the third inlet tube and get into first shell, and the rotation of second transmission shaft drives the screw rod and rotates, and the screw rod rotates and can promote rivers to flow to the centrifugal pump in, and the filter screen bottom the centrifugal pump damages in the use, and impurity, granule will follow the third inlet tube and get into first shell, and the screw rod rotates and can drive impurity, granule entering second shell.

Specifically, the cleaning mechanism comprises a connecting groove, the upper end of the connecting groove is fixedly connected with a first shell, the side wall of the connecting groove is fixedly connected with a second water inlet pipe, the lower end of the connecting groove is fixedly connected with a second shell, an iron wire net is arranged on the side wall inside the second shell, the second shell is fixedly connected with a second connecting pipe, and one end of the second connecting pipe is fixedly connected with the first water inlet pipe; impurities and particles can be blocked by the wire netting in the second shell, a part of water can enter the second shell, water in the second shell can penetrate through the wire netting to enter the centrifugal pump due to the negative pressure at the center of the centrifugal pump, and the particle impurities in the second shell are cleaned regularly.

The invention has the beneficial effects that:

(1) according to the liquid filling-free low-cavitation centrifugal pump, the steel wire rope can be driven to pull the rubber ball to move upwards through the rotation of the motor, so that water in the water storage tank can enter the volute through the first connecting pipe, and the centrifugal pump is filled with liquid to promote the normal working and operation of the centrifugal pump.

(2) According to the liquid filling-free low-cavitation centrifugal pump, negative pressure is generated at the center of the centrifugal pump through rotation of the impeller, so that water enters the first shell through the third water inlet pipe, and when a filter screen at the bottom of the centrifugal pump is damaged, particle impurities can enter the first shell from the second water inlet pipe under the pushing of the screw rod, so that the particles and the impurities are prevented from entering the centrifugal pump to damage the impeller.

(3) According to the liquid filling-free low-cavitation centrifugal pump, the rotation of the screw can promote water to flow into the centrifugal pump and simultaneously drive particles and impurities in the first shell to enter the second shell, the water can enter the second water inlet pipe from the small hole and finally enter the volute, and therefore even if a filter screen at the bottom of the centrifugal pump is damaged, the effect of protecting the centrifugal pump can be achieved again to prevent the particles and the impurities from entering the centrifugal pump.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall structure provided by the present invention;

FIG. 2 is a cross-sectional view of a portion of the structure shown in FIG. 1;

FIG. 3 is a schematic view of the connection structure of the spur gear and the rack shown in FIG. 2;

FIG. 4 is a schematic structural view of the impeller shown in FIG. 2;

fig. 5 is an enlarged view of the portion a shown in fig. 2.

In the figure: 1. a pulling mechanism; 11. an electric motor; 12. a first drive shaft; 13. a spur gear; 14. a rack; 15. a slider; 16. a blocking block; 17. a sleeve; 18. a support body; 19. a wire rope; 110. a first rotation pin; 111. a second rotation pin; 112. a rubber ball; 113. a volute; 114. an impeller; 115. a support bar; 116. a spring; 117. a fixed block; 118. a base; 2. a watering mechanism; 21. a first water inlet pipe; 22. a water storage tank; 23. a rubber block; 24. a baffle plate; 25. a first connecting pipe; 26. a water outlet pipe; 3. a screw mechanism; 31. a screw mechanism; 31. a second drive shaft; 32. a second water inlet pipe; 33. a bearing; 34. a first housing; 35. a screw; 36. a small hole; 37. a third water inlet pipe; 4. a cleaning mechanism; 41. connecting grooves; 42. a second housing; 43. a wire mesh; 44. a second connecting pipe.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-5, the liquid-filling-free low-cavitation centrifugal pump comprises a pulling mechanism 1, a water filling mechanism 2, a spiral mechanism 3 and a cleaning mechanism 4, wherein the water filling mechanism 2 is arranged at one end of the pulling mechanism 1, and the spiral mechanism 3 is arranged at the lower end of the water filling mechanism 2; the lower end of the spiral mechanism 3 is provided with a cleaning mechanism 4; the rotation of the motor 11 can drive the steel cable 19 to pull the rubber ball 112 upwards, so that the water in the water storage tank 22 enters the volute 113 through the first connecting pipe 25, so that the centrifugal pump is filled with liquid to promote normal operation of the centrifugal pump, and negative pressure is generated at the center of the centrifugal pump by rotation of the impeller 114, so that water enters the first casing 34 through the third water inlet pipe 37, when the filter screen at the bottom of the centrifugal pump is damaged, the particle impurities can enter the first shell 34 from the second water inlet pipe 32 under the pushing of the screw 35, the rotation of the screw 35 can promote the water to flow into the centrifugal pump and can also drive the particle impurities in the first shell 34 into the second shell 42, and the water enters the second water inlet pipe 32 from the small hole 36 and finally enters the volute 113, so that even if the bottom filter screen is damaged, the function of protecting the centrifugal pump can be achieved again to prevent particles and impurities from entering.

Specifically, the pulling mechanism 1 includes a motor 11, the motor 11 is fixedly connected to one end of a first transmission shaft 12, the first transmission shaft 12 is fixedly connected to the middle of a straight gear 13, the straight gear 13 is tightly attached to a side wall of a rack 14, the rack 14 is fixedly connected to the middle of a sliding block 15, the sliding block 15 is fixedly connected to one end of a blocking block 16, the blocking block 16 is disposed inside a sleeve 17, the side wall of the sleeve 17 is fixedly connected to a support 18, the lower end of the support 18 is fixedly connected to a base 118, and the upper end of the sliding block 15 is fixedly connected to a steel wire rope 19; the motor 11 is started, the motor 11 rotates to drive the first transmission shaft 12 to rotate, the first transmission shaft 12 rotates to drive the straight gear 13 to rotate, and the straight gear 13 rotates to drive the rack 14 to move downwards.

Specifically, the pulling mechanism 1 further comprises a first rotating pin 110, the steel wire rope 19 is tightly attached to the side wall of the first rotating pin 110, one end of the first rotating pin 110 is movably connected with the supporting body 18, the steel wire rope 19 is tightly attached to the side wall of the second rotating pin 111, one end of the second rotating pin 111 is movably connected with the water storage tank 22, one end of the steel wire rope 19 is fixedly connected with the rubber ball 112, one end of the first transmission shaft 12 is movably connected with a volute 113, the lower end of the volute 113 is fixedly connected with a base 118, one end of the first transmission shaft 12 is fixedly connected with the impeller 114, the side wall of the sliding block 15 is fixedly connected with the supporting rod 115, the supporting rod 115 is fixedly connected with the upper end of the spring 116, the lower end of the spring 116 is fixedly connected with the fixing block 117, the fixed block 117 is fixedly connected with the side wall of the support 18, and the lower end of the motor 11 is fixedly connected with the base 118; the downward movement of the rack 14 drives the support rod 115 to extrude the spring 116 downward, so that the spring 116 drives the sliding block 15 to reset when the motor 11 stops rotating, the downward movement of the rack 14 drives the sliding block 15 to move downward, the downward movement of the sliding block 15 drives the steel wire rope 19 to move downward, the downward movement of the steel wire rope 19 pulls the rubber ball 112 to move upward, and thus, the water in the water storage tank 22 flows into the volute 113, so that the centrifugal pump is filled with liquid to promote the normal operation of the centrifugal pump.

Specifically, the watering mechanism 2 comprises a first water inlet pipe 21, one end of the first water inlet pipe 21 is fixedly connected with the side wall of the water storage tank 22, the side wall inside the water storage tank 22 is fixedly connected with a rubber block 23, the upper end of the rubber block 23 is tightly attached to a rubber ball 112, a blocking piece 24 is arranged at the upper end of the rubber ball 112, the blocking piece 24 is fixedly connected with the side wall inside the water storage tank 22, the lower end of the water storage tank 22 is fixedly connected with a first connecting pipe 25, the lower end of the first connecting pipe 25 is fixedly connected with a volute 113, and the upper end of the water storage tank 22 is fixedly connected with a water outlet pipe 26; when the centrifugal pump stops working, the rubber ball 112 blocks the water storage tank 22, so that a certain amount of water is retained in the water storage tank 22, and the centrifugal pump is filled with water when the centrifugal pump works next time.

Specifically, the screw mechanism 3 includes a second transmission shaft 31, one end of the second transmission shaft 31 is fixedly connected with the first transmission shaft 12, the second transmission shaft 31 is disposed inside a bearing 33, a side wall of the bearing 33 is fixedly connected with a first housing 34, a side wall of the first housing 34 is provided with a small hole 36, one end of the second transmission shaft 31 is fixedly connected with a screw 35, one end of the first housing 34 is fixedly connected with a third water inlet pipe 37, a side wall of the third water inlet pipe 37 is fixedly connected with a second water inlet pipe 32, the first housing 34 is disposed inside the second water inlet pipe 32, and one end of the second water inlet pipe 32 is fixedly connected with the volute 113; the first transmission shaft 12 rotates to drive the impeller 114 to rotate to generate centrifugal force, so that negative pressure is generated at the center of the centrifugal pump, water enters the first shell 34 from the third water inlet pipe 37, the second transmission shaft 31 rotates to drive the screw rod 35 to rotate, the screw rod 35 rotates to promote the water to flow into the centrifugal pump, when a filter screen at the bottom of the centrifugal pump is damaged in the using process, impurities and particles enter the first shell 34 from the third water inlet pipe 37, and the screw rod 35 rotates to drive the impurities and the particles to enter the second shell 42.

Specifically, the cleaning mechanism 4 includes a connecting groove 41, an upper end of the connecting groove 41 is fixedly connected to the first housing 34, a side wall of the connecting groove 41 is fixedly connected to the second water inlet pipe 32, a lower end of the connecting groove 41 is fixedly connected to the second housing 42, a wire mesh 43 is disposed on a side wall inside the second housing 42, the second housing 42 is fixedly connected to the second connecting pipe 44, and one end of the second connecting pipe 44 is fixedly connected to the first water inlet pipe 32; foreign materials and particles are blocked by the wire 43 in the second casing 42, and a part of water enters the second casing 42, so that the water in the second casing passes through the wire 43 to enter the centrifugal pump due to the negative pressure existing at the center of the centrifugal pump, and the particulate foreign materials in the second casing 42 are cleaned regularly.

When the centrifugal pump is used for the first time, firstly, water is filled in the first water inlet pipe 21, so that the water storage tank 22 is filled with water, then the first water inlet pipe 21 is closed, the motor 11 is started, the motor 11 rotates to drive the first transmission shaft 12 to rotate, the first transmission shaft 12 rotates to drive the straight gear 13 to rotate, the straight gear 13 rotates to drive the rack 14 to move downwards, the rack 14 moves downwards to drive the supporting rod 115 to extrude the spring 116 downwards, so that the spring 116 drives the sliding block 15 to reset when the motor 11 stops rotating, the rack 14 moves downwards to drive the sliding block 15 to move downwards, the sliding block 15 moves downwards to drive the steel wire rope 19 to move downwards, the steel wire rope 19 moves downwards to drive the rubber ball 112 to move upwards, so that the water in the water storage tank 22 flows into the volute 113, the centrifugal pump is filled with liquid to promote the normal operation of the centrifugal pump, and when the centrifugal pump stops operating, the rubber ball 112 blocks the water storage tank 22, a certain amount of water is retained in the water storage tank 22, the centrifugal pump is filled with water when the centrifugal pump works next time, the first transmission shaft 12 rotates to drive the impeller 114 to rotate to generate centrifugal force, negative pressure is generated at the center of the centrifugal pump, and the water enters the first casing 34 from the third water inlet pipe 37, the rotation of the second transmission shaft 31 drives the screw 35 to rotate, the rotation of the screw 35 can promote the water to flow into the centrifugal pump, when the filter screen at the bottom of the centrifugal pump is damaged in use, impurities and particles can enter the first shell 34 from the third water inlet pipe 37, the rotation of the screw 35 will drive the impurities and particles into the second housing 42, the impurities and particles will be blocked by the wire 43 in the second housing 42, and a part of the water will enter the second housing 42, the second housing 42 is periodically cleaned of particulate impurities due to the negative pressure at the center of the centrifugal pump so that water in the second housing passes through the wire 43 and into the centrifugal pump.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a exempt from to irritate liquid low cavitation centrifugal pump which characterized in that: the irrigation device comprises a pulling mechanism (1), an irrigation mechanism (2), a spiral mechanism (3) and a cleaning mechanism (4), wherein the irrigation mechanism (2) is arranged at one end of the pulling mechanism (1), and the spiral mechanism (3) is arranged at the lower end of the irrigation mechanism (2); the lower end of the spiral mechanism (3) is provided with a cleaning mechanism (4);

pulling mechanism (1) includes motor (11), motor (11) and first transmission shaft (12) one end fixed connection, fixed connection in the middle of first transmission shaft (12) and straight-teeth gear (13), straight-teeth gear (13) and rack (14) lateral wall closely laminate, fixed connection in the middle of rack (14) and sliding block (15), sliding block (15) and block piece (16) one end fixed connection, block piece (16) and set up inside sleeve (17), sleeve (17) lateral wall and supporter (18) fixed connection, supporter (18) lower extreme and base (118) fixed connection, sliding block (15) upper end and wire rope (19) fixed connection.

2. The non-priming low-cavitation centrifugal pump according to claim 1, characterized in that: pulling mechanism (1) still includes first rotation round pin (110), wire rope (19) and first rotation round pin (110) lateral wall closely laminate, first rotation round pin (110) one end and supporter (18) swing joint, wire rope (19) and second rotation round pin (111) lateral wall closely laminate, second rotation round pin (111) one end and aqua storage tank (22) swing joint, wire rope (19) one end and rubber ball (112) fixed connection, first transmission shaft (12) one end and spiral case (113) swing joint, spiral case (113) lower extreme and base (118) fixed connection, first transmission shaft (12) one end and impeller (114) fixed connection, sliding block (15) lateral wall and bracing piece (115) fixed connection, bracing piece (115) and spring (116) upper end fixed connection, spring (116) lower extreme and fixed block (117) fixed connection, the fixed block (117) is fixedly connected with the side wall of the support body (18), and the lower end of the motor (11) is fixedly connected with the base (118).

3. The non-priming low-cavitation centrifugal pump of claim 2, characterized in that: mechanism (2) of watering includes first inlet tube (21), first inlet tube (21) one end and aqua storage tank (22) lateral wall fixed connection, inside lateral wall and rubber block (23) fixed connection of aqua storage tank (22), rubber block (23) upper end and rubber ball (112) closely laminate, rubber ball (112) upper end is equipped with separation blade (24), separation blade (24) and the inside lateral wall fixed connection of aqua storage tank (22), aqua storage tank (22) lower extreme and first connecting pipe (25) fixed connection, first connecting pipe (25) lower extreme and spiral case (113) fixed connection, aqua storage tank (22) upper end and outlet pipe (26) fixed connection.

4. The non-priming low-cavitation centrifugal pump according to claim 3, characterized in that: the screw mechanism (3) comprises a second transmission shaft (31), one end of the second transmission shaft (31) is fixedly connected with the first transmission shaft (12), and the second transmission shaft (31) is arranged inside the bearing (33).

5. The non-priming low-cavitation centrifugal pump according to claim 4, characterized in that: screw mechanism (3) still includes first shell (34), bearing (33) lateral wall and first shell (34) fixed connection, first shell (34) lateral wall is equipped with aperture (36), second transmission shaft (31) one end and screw rod (35) fixed connection, first shell (34) one end and third inlet tube (37) fixed connection, third inlet tube (37) lateral wall and second inlet tube (32) fixed connection, first shell (34) set up inside second inlet tube (32), second inlet tube (32) one end and spiral case (113) fixed connection.

6. The non-priming low-cavitation centrifugal pump according to claim 5, characterized in that: clearance mechanism (4) are including spread groove (41), spread groove (41) upper end and first shell (34) fixed connection, spread groove (41) lateral wall and second inlet tube (32) fixed connection, spread groove (41) lower extreme and second shell (42) fixed connection, the inside lateral wall of second shell (42) is equipped with wire netting (43), second shell (42) and second connecting pipe (44) fixed connection, second connecting pipe (44) one end and first inlet tube (32) fixed connection.