CN112814914A

CN112814914A - Centrifugal water pump

Info

Publication number: CN112814914A
Application number: CN202110102327.XA
Authority: CN
Inventors: 朱成浩; 张云霞
Original assignee: Jinan Dechuang Test Instrument Co ltd
Current assignee: Jinan Dechuang Test Instrument Co ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-05-18

Abstract

The invention relates to a centrifugal water pump, which comprises a pump body, a rotating shaft, an impeller, an exhaust unit and a pressure sensor, wherein the rotating shaft is arranged on the pump body; a first pump shell is arranged on the left side of the pump body, and a second pump shell is arranged on the right side of the pump body; a pump chamber is formed in the first pump casing; the rotating shaft is rotatably connected in the second pump shell; an impeller is arranged on the left side of the rotating shaft; an inlet A communicated with the pump cavity is axially arranged on the left side of the first pump shell along the rotating shaft, and an outlet B communicated with the pump cavity is arranged on the outer side of the first pump shell; an exhaust unit is arranged outside the impeller; a pressure sensor is arranged in the first pump shell at the outlet B; the rotating shaft is matched with the exhaust unit to ensure that the centrifugal water pump can be switched between a water injection state and a working state; according to the invention, the unidirectional driving assembly and the unidirectional locking assembly are arranged, so that the water pump can be switched between a water injection state and a working state; simultaneously, the water pump is filled with water in a mode of meshing the first gear and the second gear, so that the water pump is convenient and effective, the labor cost is saved, and the working efficiency is improved.

Description

Centrifugal water pump

Technical Field

The invention belongs to the technical field of centrifugal pumps, and particularly relates to a centrifugal water pump.

Background

The centrifugal pump is used as a rotating device for conveying media, is mainly used for conveying liquid including water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal and the like, and can also be used for conveying liquid, gas mixture and liquid containing suspended solids; centrifugal pumps are widely used in various industries such as electric power, metallurgy, coal, building materials and the like, and are widely applied. The technical parameters for measuring the performance of the centrifugal pump include flow, suction lift, shaft power, water power, efficiency and the like. Before the centrifugal pump is started, the pump cavity and the pipeline are filled with a large amount of air, liquid media must be manually injected to drain the air in the pump cavity and the pipeline, so that when the centrifugal pump is started, the liquid media are pumped out by the centrifugal force generated by the rotation of the impeller, enough vacuum degree is formed in the pump cavity, the liquid media are continuously sucked, the labor intensity of manual liquid injection is high, time and labor are wasted, and the cost is high.

Disclosure of Invention

In order to solve the above problems, the present invention provides a centrifugal water pump.

In order to achieve the above object, the present invention provides the following technical solution, wherein the centrifugal water pump comprises a pump body, a rotating shaft, an impeller, an exhaust unit and a pressure sensor; a first pump shell is arranged on the left side of the pump body, and a second pump shell is arranged on the right side of the pump body; a pump chamber is formed in the first pump casing; the rotating shaft is rotatably connected in the second pump shell; an impeller is arranged on the left side of the rotating shaft; an inlet A communicated with the pump cavity is axially arranged on the left side of the first pump shell along the rotating shaft, and an outlet B communicated with the pump cavity is arranged on the outer side of the first pump shell; an exhaust unit is arranged outside the impeller; a pressure sensor is arranged in the first pump shell at the outlet B; the rotation shaft and the exhaust unit are matched to enable the centrifugal water pump to be switched between a water injection state and a working state.

When the rotating shaft rotates clockwise, the centrifugal water pump is in a water injection state, and the air exhaust unit works in the process to enable the pump cavity to be filled with liquid; the pressure sensor is used for measuring the liquid pressure in the pump cavity, a signal is sent out after the measured value of the pressure sensor reaches a set value to enable the rotating shaft to rotate anticlockwise, and the centrifugal water pump is switched to a working state from a water injection state; at the moment, the rotating shaft drives the impeller to rotate anticlockwise, and the impeller works normally.

Preferably, the exhaust unit comprises a one-way driving assembly, a first gear, a fixing rod, a one-way locking assembly and a second gear; a unidirectional driving assembly is arranged on the cylindrical surface of the impeller; the first gear is in rotary connection with the impeller through a first through hole, a plurality of first ratchet grooves are uniformly arranged in the first through hole at intervals along the circumferential direction, and the first gear is in matched transmission with the one-way driving assembly through the first ratchet grooves; the upper part of the second pump shell is fixedly connected with a fixed rod; a unidirectional locking assembly is arranged on the cylindrical surface of the fixed rod; the second gear is rotationally connected with the fixed rod through a second through hole, a plurality of second ratchet grooves are uniformly arranged in the second through hole at intervals along the circumferential direction, and the second gear is matched with the one-way locking assembly through the second ratchet grooves to limit the clockwise rotation of the second gear; the first gear is meshed with the second gear; a water inlet area and a water outlet area are respectively formed on two sides of a meshing area of the first gear and the second gear in the second pump shell from right to left, and a water inlet E connected with the water inlet area is formed on the outer side of the second pump shell; the water outlet area is connected with the pump cavity through a flow passage: and a one-way valve for limiting liquid from entering the water outlet area from the pump cavity is arranged in the flow passage.

Preferably, the one-way driving assembly comprises a first mounting groove, a first pawl and a first elastic sheet; a first mounting groove is formed in the impeller; a first pawl is rotationally connected in the first mounting groove; a first elastic sheet for forcing the first pawl to extend into the first ratchet groove is arranged between the first pawl and the first mounting groove; when the rotating shaft drives the impeller to rotate clockwise, the first pawl is abutted against the first ratchet groove to drive the first gear to rotate.

Preferably, the one-way locking assembly comprises a second mounting groove, a second pawl and a second elastic sheet; a second mounting groove is formed in the fixed rod; a second pawl is rotatably connected in the second mounting groove; a second elastic sheet for forcing the second pawl to extend into the second ratchet groove is arranged between the second pawl and the second mounting groove; when the second gear rotates clockwise, the second pawl is abutted against the second ratchet groove to limit the rotation of the second gear.

Preferably, the centrifugal water pump is in a water injection state; the rotating shaft drives the impeller to rotate clockwise, the first pawl props against the first ratchet groove to drive the first gear to rotate clockwise, and the second pawl, the second elastic sheet and the second ratchet groove are matched to enable the first gear to drive the second gear to rotate anticlockwise; the water inlet area forms negative pressure to suck water from the water inlet E, the water is pressurized through the movement of the first gear and the second gear, and the water is conveyed into the pump cavity through the flow passage; and the pressure sensor sends a signal to enable the rotating shaft to rotate anticlockwise after measuring that the liquid pressure in the pump cavity reaches a set value, so that the centrifugal water pump is switched to a working state from a water injection state.

Preferably, when the centrifugal water pump is in a working state, the rotating shaft rotates anticlockwise; at the moment, the first gear has the tendency of anticlockwise rotation, and the second pawl is propped in the second ratchet groove to limit the clockwise rotation of the second gear, so that the first gear and the second gear are kept in a static state, and the rotating shaft drives the impeller to anticlockwise rotate to work.

Compared with the prior art, the invention has the advantages that:

according to the invention, the unidirectional driving assembly and the unidirectional locking assembly are arranged, so that the water pump can be switched between a water injection state and a working state; simultaneously, the water pump is filled with water in a mode of meshing the first gear and the second gear, so that the water pump is convenient and effective, the labor cost is saved, and the working efficiency is improved.

Drawings

FIG. 1 is a cross-sectional view of the present invention in operation;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1 in accordance with the present invention;

FIG. 4 is an enlarged view of region I of FIG. 3 according to the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1-4, is a preferred embodiment of the present invention.

The centrifugal water pump comprises a pump body 1, a rotating shaft 2, an impeller 3, an exhaust unit 4 and a pressure sensor 5; a first pump shell 11 is arranged on the left side of the pump body 1, and a second pump shell 12 is arranged on the right side of the pump body 1; a pump chamber 111 is formed in the first pump case 11; the rotating shaft 2 is rotatably connected in a second pump shell 12; an impeller 3 is arranged on the left side of the rotating shaft 2; an inlet A communicated with the pump cavity 111 is axially arranged on the left side of the first pump shell 11 along the rotating shaft 2, and an outlet B communicated with the pump cavity 111 is arranged on the outer side of the first pump shell 11; an exhaust unit 4 is arranged outside the impeller 3; a pressure sensor 5 is arranged in the first pump shell 11 at the outlet B; the rotating shaft 2 and the exhaust unit 4 are matched to enable the centrifugal water pump to be switched between a water injection state and a working state.

When the rotating shaft 2 rotates clockwise, the centrifugal water pump is in a water injection state, and the exhaust unit 4 works in the process to enable the pump cavity 111 to be filled with liquid; the pressure sensor 5 is used for measuring the pressure of liquid in the pump cavity 111, a signal is sent out after the measured value of the pressure sensor 5 reaches a set value so that the rotating shaft 2 rotates anticlockwise, and the centrifugal water pump is switched to a working state from a water injection state; at the moment, the rotating shaft 2 drives the impeller 3 to rotate anticlockwise, and the impeller 3 works normally; the water injection work in the pump cavity 111 is automatically completed through the exhaust unit 4, the efficiency is improved, and the labor cost is reduced.

The exhaust unit 4 comprises a one-way driving assembly 41, a first gear 42, a fixing rod 43, a one-way locking assembly 44 and a second gear 45; a unidirectional driving component 41 is arranged on the cylindrical surface of the impeller 3; the first gear 42 is rotatably connected with the impeller 3 through a first through hole 421, a plurality of first ratchet grooves 422 are uniformly arranged in the first through hole 421 at intervals along the circumferential direction, and the first gear 42 is in matched transmission with the unidirectional driving assembly 41 through the first ratchet grooves 422; a fixed rod 43 is fixedly connected to the upper part of the second pump shell 12; a one-way locking assembly 44 is arranged on the cylindrical surface of the fixed rod 43; the second gear 45 is rotatably connected with the fixing rod 43 through the second through hole 451, a plurality of second ratchet grooves 452 are uniformly arranged in the second through hole 451 along the circumferential direction at intervals, and the second gear 45 is matched with the one-way locking assembly 44 through the second ratchet grooves 452 to limit the clockwise rotation of the second gear 45; the first gear 42 and the second gear 45 are meshed; a water inlet area 121 and a water outlet area 122 are respectively formed on two sides of the meshing area of the first gear 42 and the second gear 45 in the second pump shell 12 from right to left, and a water inlet E connected with the water inlet area 121 is arranged on the outer side of the second pump shell 12; the outlet section 122 is connected to the pump chamber 111 via a flow passage 123: a one-way valve 124 is provided in the flow passage 123 to restrict the flow of liquid from the pump chamber 111 into the exit area 122.

The one-way driving assembly 41 comprises a first mounting groove 411, a first pawl 412 and a first elastic sheet 413; a first mounting groove 411 is formed in the impeller 3; a first pawl 412 is rotatably connected in the first mounting groove 411; a first elastic piece 413 for forcing the first pawl 412 to extend into the first ratchet groove 422 is arranged between the first pawl 412 and the first mounting groove 411; when the rotating shaft 2 drives the impeller 3 to rotate clockwise, the first pawl 412 abuts against the first ratchet groove 422 to drive the first gear 42 to rotate.

The one-way locking assembly 44 comprises a second mounting groove 441, a second pawl 442 and a second elastic sheet 443; a second mounting groove 441 is arranged on the fixing rod 43; a second pawl 442 is rotatably connected to the second mounting groove 441; a second elastic sheet 443 for forcing the second pawl 442 to extend into the second ratchet groove 452 is arranged between the second pawl 442 and the second mounting groove 441; when the second gear 45 rotates clockwise, the second pawl 442 abuts against the second ratchet groove 452 to restrict the rotation of the second gear 45.

The centrifugal water pump of the invention has the following working process:

the centrifugal water pump is positioned in a water injection state; the rotating shaft 2 drives the impeller 3 to rotate clockwise, the first pawl 412 abuts against the first ratchet groove 422 to drive the first gear 42 to rotate clockwise, and the second pawl 442, the second elastic sheet 443 and the second ratchet groove 452 cooperate to enable the first gear 42 to drive the second gear 45 to rotate counterclockwise; the water inlet area 121 forms negative pressure to suck water from the water inlet E, is pressurized by the movement of the first gear 42 and the second gear 45, and is transported into the pump cavity 111 through the flow passage 123 (see fig. 2 and 3); the pressure sensor 5 sends a signal to rotate the rotating shaft 2 counterclockwise after detecting that the liquid pressure in the pump cavity 111 reaches a set value, so that the centrifugal water pump is switched from a water injection state to a working state.

When the centrifugal water pump is in a working state, the rotating shaft 2 rotates anticlockwise; at this time, the first gear 42 tends to rotate counterclockwise, and the second pawl 442 abuts against the second ratchet groove 452 to limit the clockwise rotation of the second gear 45 (see fig. 4), so that the first gear 42 and the second gear 45 are kept in a stationary state, and the rotating shaft 2 drives the impeller 3 to rotate counterclockwise to operate.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A centrifugal water pump characterized in that: the centrifugal water pump comprises a pump body (1), a rotating shaft (2), an impeller (3), an exhaust unit (4) and a pressure sensor (5); a first pump shell (11) is arranged on the left side of the pump body (1), and a second pump shell (12) is arranged on the right side of the pump body (1); a pump chamber (111) is formed in the first pump housing (11); the rotating shaft (2) is rotatably connected in the second pump shell (12); an impeller (3) is arranged on the left side of the rotating shaft (2); an inlet A communicated with the pump cavity (111) is axially arranged on the left side of the first pump shell (11) along the rotating shaft (2), and an outlet B communicated with the pump cavity (111) is arranged on the outer side of the first pump shell (11); an exhaust unit (4) is arranged on the outer side of the impeller (3); a pressure sensor (5) is arranged in the first pump shell (11) at the outlet B; the rotating shaft (2) is matched with the exhaust unit (4) to enable the centrifugal water pump to be switched between a water injection state and a working state;

when the rotating shaft (2) rotates clockwise, the centrifugal water pump is in a water injection state, and the air exhaust unit (4) works in the process to enable the pump cavity (111) to be filled with liquid; the pressure sensor (5) is used for measuring the pressure of liquid in the pump cavity (111), a signal is sent out after the measured value of the pressure sensor (5) reaches a set value to enable the rotating shaft (2) to rotate anticlockwise, and the centrifugal water pump is switched to a working state from a water injection state; at the moment, the rotating shaft (2) drives the impeller (3) to rotate anticlockwise, and the impeller (3) works normally.

2. The centrifugal water pump of claim 1, wherein: the exhaust unit (4) comprises a one-way driving assembly (41), a first gear (42), a fixed rod (43), a one-way locking assembly (44) and a second gear (45); a unidirectional driving component (41) is arranged on the cylindrical surface of the impeller (3); the first gear (42) is rotatably connected with the impeller (3) through a first through hole (421), a plurality of first ratchet grooves (422) are uniformly arranged in the first through hole (421) at intervals along the circumferential direction, and the first gear (42) is in matched transmission with the one-way driving assembly (41) through the first ratchet grooves (422); the upper part of the second pump shell (12) is fixedly connected with a fixed rod (43); a unidirectional locking component (44) is arranged on the cylindrical surface of the fixed rod (43); the second gear (45) is rotatably connected with the fixing rod (43) through a second through hole (451), a plurality of second ratchet grooves (452) are uniformly arranged in the second through hole (451) at intervals along the circumferential direction, and the second gear (45) is matched with the one-way locking assembly (44) through the second ratchet grooves (452) to limit the clockwise rotation of the second gear (45); the first gear (42) and the second gear (45) are meshed; a water inlet area (121) and a water outlet area (122) are respectively formed on two sides of a meshing area of the first gear (42) and the second gear (45) in the second pump shell (12) from right to left, and a water inlet E connected with the water inlet area (121) is formed in the outer side of the second pump shell (12); the water outlet area (122) is connected with the pump cavity (111) through a flow passage (123): a one-way valve (124) is arranged in the flow passage (123) and limits liquid from the pump cavity (111) to the water outlet area (122).

3. The centrifugal water pump of claim 2, wherein: the one-way driving assembly (41) comprises a first mounting groove (411), a first pawl (412) and a first elastic sheet (413); a first mounting groove (411) is formed in the impeller (3); a first pawl (412) is rotatably connected in the first mounting groove (411); a first elastic sheet (413) forcing the first pawl (412) to extend into the first ratchet groove (422) is arranged between the first pawl (412) and the first mounting groove (411); when the rotating shaft (2) drives the impeller (3) to rotate clockwise, the first pawl (412) is abutted in the first ratchet groove (422) to drive the first gear (42) to rotate.

4. The centrifugal water pump of claim 3, wherein: the one-way locking assembly (44) comprises a second mounting groove (441), a second pawl (442) and a second elastic sheet (443); a second mounting groove (441) is formed in the fixing rod (43); a second pawl (442) is rotatably connected in the second mounting groove (441); a second elastic sheet (443) for forcing the second pawl (442) to extend into the second ratchet groove (452) is arranged between the second pawl (442) and the second mounting groove (441); when the second gear (45) rotates clockwise, the second pawl (442) abuts against the second ratchet groove (452) to limit the rotation of the second gear (45).

5. The centrifugal water pump according to claim 4, wherein the centrifugal water pump is in a water-filling state; the rotating shaft (2) drives the impeller (3) to rotate clockwise, the first pawl (412) is propped against the first ratchet groove (422) to drive the first gear (42) to rotate clockwise, and the second pawl (442), the second elastic sheet (443) and the second ratchet groove (452) are matched to enable the first gear (42) to drive the second gear (45) to rotate anticlockwise; the water inlet area (121) forms negative pressure to suck water from the water inlet E, is pressurized by the movement of the first gear (42) and the second gear (45), and is transported into the pump cavity (111) through the flow passage (123); the pressure sensor (5) detects that the pressure of liquid in the pump cavity (111) reaches a set value, and then sends a signal to enable the rotating shaft (2) to rotate anticlockwise, so that the centrifugal water pump is switched to a working state from a water injection state.

6. The centrifugal water pump according to claim 5, characterized in that the rotating shaft (2) rotates counterclockwise when the centrifugal water pump is in the working state; at the moment, the first gear (42) tends to rotate anticlockwise, and the second pawl (442) is abutted in the second ratchet groove (452) to limit the clockwise rotation of the second gear (45), so that the first gear (42) and the second gear (45) are kept in a static state, and the rotating shaft (2) drives the impeller (3) to rotate anticlockwise to work.