CN111734602B

CN111734602B - Self-priming centrifugal pump capable of treating gas-liquid mixed medium

Info

Publication number: CN111734602B
Application number: CN202010649319.2A
Authority: CN
Inventors: 郑路路; 马晓杰; 璩晶磊; 王蒙蒙; 陈芳; 郑立爽; 刘玲玲; 席夏青
Original assignee: Henan Institute of Technology
Current assignee: Henan Plain Public Intellectual Property Operation And Management Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2022-02-01
Anticipated expiration: 2040-07-08
Also published as: CN111734602A

Abstract

The invention discloses a self-priming centrifugal pump capable of treating gas-liquid mixed media, which comprises an outer shell; the right side of the outer shell is fixedly connected with a group of water inlet shells, the top of the outer shell is provided with a group of water outlets, and the right side of the water inlet shell is provided with a group of water inlets; the right end surface of the outer shell is provided with a group of outer shell water inlet connecting flanges, and the left end surface of the water inlet shell is fixedly connected with a group of water inlet shell connecting flanges; a group of impeller bodies are rotatably connected inside the left side of the outer shell; the left end surface of the impeller body is coaxially and fixedly connected with a group of impeller driving shafts; a group of piston cylinder bodies are fixedly connected inside the right side of the outer shell; the inner circumference of the piston cylinder body is arranged in an array manner and is connected with five groups of piston rods and piston cavities in a sliding manner; the inside filter screen clamping ring crimping that passes through of shell body right side is connected with a set of filter screen of intaking. The invention can deal with different media such as gas, liquid and the like, has strong adaptability and self-absorption capability, and can provide higher lift while ensuring sufficient flow.

Description

Self-priming centrifugal pump capable of treating gas-liquid mixed medium

Technical Field

The invention relates to the technical field of centrifugal pumps, in particular to a self-priming centrifugal pump capable of treating gas-liquid mixed media.

Background

The centrifugal pump is a pump for conveying liquid by the centrifugal force generated when an impeller rotates, the basic structure of the centrifugal pump is composed of six parts, namely the impeller, a pump body, a pump shaft, a bearing, a sealing ring and a stuffing box, and the centrifugal pump is widely favored by people due to the characteristics of compact structure, uniform flow, stable operation, small vibration, lower equipment installation, maintenance and overhaul cost and the like.

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.

For example, patent CN201510219764.4 discloses a centrifugal pump, which includes a rotor assembly including an impeller, the impeller includes a plurality of blades and blade fixing portions, the blades and the blade fixing portions are integrally injection-molded, and the blades are circumferentially distributed at equal intervals along the blade fixing portions; the blade includes first side, second side, blade top and blade root, and it is fixed that blade root and blade fixed part are moulded plastics, and the blade top is the cantilever end of blade, includes first side and second side between blade root and the blade top, and first side and second side all include a bellying and a depressed part, and the center pin that uses the impeller is the cylindrical surface that the axis formed is to the blade cuts the contained angle that becomes on the cross-section that forms, the intersection line that first side and second side and disc formed and the parallel line of center pin on the cross-section are roughly the same, and the rotor subassembly that sets up like this can improve the hydraulic efficiency and the lift of centrifugal pump.

Based on the above, the existing centrifugal pump generally has no self-priming capability, and when the existing centrifugal pump meets the condition that the existing centrifugal pump cannot work normally when the medium contains gas, the lift flow range of the existing centrifugal pump is not wide enough, and the use requirement of a specific environment cannot be met; therefore, the self-priming centrifugal pump can treat gas-liquid mixed media without meeting the existing requirements.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide a self-priming centrifugal pump capable of treating a gas-liquid mixed medium, which aims to solve the problems that the conventional centrifugal pump in the background art generally has no self-priming capability, can not work normally when the medium contains gas in use, and simultaneously has a narrow range of lift flow rate and can not meet the use requirement of a specific environment.

In order to achieve the above object, the present invention provides a self-priming centrifugal pump capable of treating a gas-liquid mixed medium, comprising an outer casing; the right side of the outer shell is fixedly connected with a group of water inlet shells; the top of the outer shell is provided with a group of water outlets, and the right side of the water inlet shell is provided with a group of water inlets; the right end face of the outer shell is provided with a group of outer shell water inlet connecting flanges, the left end face of the water inlet shell is fixedly connected with a group of water inlet shell connecting flanges, and the outer shell water inlet connecting flanges are fixedly connected with the water inlet shell connecting flanges through bolts; a group of impeller bodies are rotatably connected inside the left side of the outer shell; the impeller body also comprises an impeller driving shaft, and the left end surface of the impeller body is coaxially and fixedly connected with a group of impeller driving shafts; a group of piston cylinder bodies are fixedly connected inside the right side of the outer shell; five groups of piston rods are arranged in a circumferential array in the piston cylinder body and are connected in a sliding manner; the piston rod further comprises a piston sealing gasket, the right end face of the piston rod is fixedly connected with a group of piston sealing gaskets, the piston cylinder body further comprises a piston cavity, five groups of piston cavities are arranged in the piston cylinder body in a circumferential array mode, and the piston sealing gaskets slide in the piston cavity to form a piston structure; the inside filter screen clamping ring crimping that passes through of shell body right side is connected with a set of filter screen of intaking.

In a preferred embodiment, six groups of blades are arranged in the impeller body, and the blades are involute centrifugal blades.

In a preferred embodiment, a group of annular impeller guide grooves are formed in the outer portion of the right side of the impeller body, and the impeller body is rotatably connected with the outer shell through the impeller guide grooves.

In a preferred embodiment, two sets of piston guide grooves are provided on the outside of the piston rod, and the piston rod is slidably connected with the piston cylinder through the piston guide grooves.

In a preferred embodiment, the piston cylinder body is still including piston water inlet, piston delivery port, and the right side in piston chamber is provided with a set of piston water inlet, and piston intracavity side is provided with a set of piston delivery port, and piston delivery port opening is towards the middle cavity of piston cylinder body, and piston water inlet and piston delivery port are inside to be provided with a set of folk prescription valve respectively, and the one-way valve in the piston water inlet opens to the piston chamber, and the one-way valve in the piston delivery port opens to the cavity in the middle of the piston cylinder body.

In a preferred embodiment, a set of piston driving grooves are formed in the inner side of the impeller body, the piston driving grooves are of a left-right changing annular structure, a set of piston driving rollers are arranged on the outer portion of the left side of the piston rod, and the piston driving rollers roll in the piston driving grooves to jointly form a cylindrical surface cam structure.

In a preferred embodiment, the inside of the middle cavity of the piston cylinder body is connected with a group of large-flow water inlet valve cores in a sliding mode, the left sides of the large-flow water inlet valve cores are elastically connected with the piston cylinder body through a group of springs, and the right sides of the large-flow water inlet valve cores are attached to the opening in the right side of the middle cavity of the piston cylinder body.

In a preferred embodiment, ten sets of pressing ring operation grooves are formed in the inner side of the filter screen pressing ring, threads are formed in the outer side of the filter screen pressing ring, and the filter screen pressing ring is in threaded connection with the outer shell through the threads.

Compared with the prior art, the self-priming centrifugal pump capable of treating the gas-liquid mixed medium has the beneficial effects that:

according to the invention, the cylindrical surface cam transmission mechanism and the piston structure are adopted, water is synchronously extracted through the piston structure while the impeller body rotates, and particularly, the water is sent into the impeller body through the piston structure to realize self-absorption at the initial starting stage of the water pump; meanwhile, the large flow is provided when the large flow is needed by adopting the large-flow water inlet valve core, and the piston structure and the centrifugal action are connected in series, so that the large lift is realized, the lift is greatly improved on the premise of ensuring the flow, the lift and the flow can meet the use requirement, and the use performance is improved; through setting up the liquid of filter screen to the water inlet of intaking, reduce the debris that get into the pump body, improve the life of centrifugal pump, and conveniently dismantle clearance and change, make things convenient for later maintenance management.

The centrifugal pump can be used for dealing with different media such as gas, liquid and the like, has strong adaptability and strong self-suction capacity, can provide higher lift while ensuring sufficient flow, reduces sundries entering a pump body, prolongs the service life of the centrifugal pump, is convenient to disassemble, clean and replace, and is convenient for later maintenance and management.

Drawings

FIG. 1 is a schematic axial side view of a self-priming centrifugal pump capable of treating a gas-liquid mixed medium according to the present invention;

FIG. 2 is a schematic isometric sectional view of the self-priming centrifugal pump of the present invention capable of treating a gas-liquid mixture medium;

FIG. 3 is a schematic isometric sectional view of an outer housing of the present invention;

FIG. 4 is a schematic isometric cross-sectional view of an impeller body of the present invention;

FIG. 5 is a schematic axial side view of the piston rod of the present invention;

FIG. 6 is a schematic axial side view of an impeller body of the present invention;

FIG. 7 is a schematic side view of the piston rod and impeller mounting shaft of the present invention;

FIG. 8 is a schematic view of the side structure of the piston rod and piston cylinder mounting shaft of the present invention;

FIG. 9 is a schematic isometric cross-sectional view of the piston cylinder of the present invention;

description of reference numerals:

1. an outer housing; 101. a filter screen baffle ring; 102. the outer shell is connected with a water inlet connecting flange; 103. a water outlet; 2. a water inlet housing; 201. a water inlet; 202. the water inlet shell is connected with a flange; 3. an impeller body; 301. a piston drive slot; 302. an impeller guide groove; 303. an impeller drive shaft; 304. a blade; 4. a piston rod; 401. the piston drives the roller; 402. a piston guide groove; 403. a piston seal; 5. a piston cylinder; 501. a piston cavity; 502. a piston water inlet; 503. a piston water outlet; 504. a large-flow water inlet valve core; 6. a water inlet filter screen; 7. a filter screen is pressed; 701. and pressing the ring to operate the groove.

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.

Example 1:

referring to fig. 1 to 9, the present invention provides a self-priming centrifugal pump capable of treating a gas-liquid mixed medium, comprising an outer casing 1; the fastening connection on the right side of shell body 1 has a set of casing 2 that intakes, and shell body 1 still includes delivery port 103, and the top of shell body 1 is provided with a set of delivery port 103. The water inlet housing 2 further comprises a water inlet 201, and a group of water inlets 201 are arranged on the right side of the water inlet housing 2. In use, water enters through the water inlet 201 and exits through the water outlet 103. Shell body 1 is still including shell body water inlet flange 102, and the right-hand member face of shell body 1 is provided with a set of shell body water inlet flange 102, and the casing 2 of intaking is still including the casing flange 202 of intaking, and the left end face fixedly connected with of the casing 2 of intaking is a set of casing flange 202 of intaking, and shell body water inlet flange 102 passes through bolt-up with the casing flange 202 of intaking, realizes shell body 1 and the 2 fastening connection of the casing of intaking. A group of impeller bodies 3 are rotatably connected in the left side of the outer shell 1, the impeller bodies 3 also comprise impeller driving shafts 303, the left end surfaces of the impeller bodies 3 are coaxially and fixedly connected with a group of impeller driving shafts 303, in use, the impeller driving shaft 303 is coaxially connected with a rotating shaft of a motor, the impeller body 3 is driven to rotate by the motor, a group of piston cylinder bodies 5 is fixedly connected inside the right side of the outer shell 1, five groups of piston rods 4 are arranged in an array manner inside the piston cylinder bodies 5 and are connected in a sliding manner, the piston rods 4 further comprise piston sealing gaskets 403, a group of piston sealing gaskets 403 is fixedly connected on the right end face of the piston rods 4, the piston cylinder bodies 5 further comprise piston cavities 501, five groups of piston cavities 501 are arranged in an array manner inside the piston cylinder bodies 5, and the piston sealing gaskets 403 slide in the piston cavities 501 to form a piston structure, when the piston rod 4 slides left and right in use, the piston rod 4 realizes water pumping action through the piston structure. The inside filter screen clamping ring 7 crimping of passing through of shell body 1 right side is connected with a set of filter screen 6 that intakes.

Example 2:

in a preferred embodiment, the impeller body 3 further comprises blades 304, the impeller body 3 is internally provided with six sets of blades 304, the blades 304 are involute centrifugal blades, and in use, water is pushed to the outside by centrifugal action generated by the rotation of the blades 304.

In a preferred embodiment, the impeller body 3 further comprises an impeller guide groove 302, a set of annular impeller guide grooves 302 are arranged on the outer portion of the right side of the impeller body 3, the impeller body 3 is rotatably connected with the outer casing 1 through the impeller guide grooves 302, and the outer casing 1 is guided through the impeller guide grooves 302 in use.

Example 3:

in a preferred embodiment, the piston rod 4 further comprises piston guide slots 402, and two sets of piston guide slots 402 are provided on the outside of the piston rod 4, the piston rod 4 being slidably connected to the piston cylinder 5 via the piston guide slots 402, the piston rod 4 being guided in use by the piston guide slots 402.

In a preferred embodiment, the piston cylinder 5 further includes a piston water inlet 502 and a piston water outlet 503, a set of piston water inlets 502 is disposed on the right side of the piston cavity 501, a set of piston water outlets 503 is disposed on the inner side of the piston cavity 501, the opening of the piston water outlet 503 faces the cavity in the middle of the piston cylinder 5, a set of one-way valves is disposed inside the piston water inlet 502 and the piston water outlet 503 respectively, the one-way valve in the piston water inlet 502 opens into the piston cavity 501, and the one-way valve in the piston water outlet 503 opens into the cavity in the middle of the piston cylinder 5, when the piston rod 4 slides left and right in use, the piston rod 4 pumps water from the piston water inlet 502 into the piston cavity 501 through the piston structure, and inputs water from the piston water outlet 503 into the cavity in the middle of the piston cylinder 5.

In a preferred embodiment, the impeller body 3 further includes a piston driving groove 301, a set of piston driving grooves 301 is disposed on the inner side of the impeller body 3, the piston driving grooves 301 are in a ring structure that varies left and right, the piston rod 4 further includes a piston driving roller 401, a set of piston driving rollers 401 is disposed on the outer portion of the left side of the piston rod 4, the piston driving rollers 401 roll in the piston driving grooves 301 to form a cylindrical cam structure, and when the impeller body 3 rotates, the impeller body 3 drives the piston rod 4 to slide left and right through the cylindrical cam structure.

In a preferred embodiment, the piston cylinder 5 further includes a large-flow water inlet valve core 504, the inside of the middle cavity of the piston cylinder 5 is slidably connected with a group of large-flow water inlet valve cores 504, the left side of the large-flow water inlet valve cores 504 is elastically connected with the piston cylinder 5 through a group of springs, the right side of the large-flow water inlet valve cores 504 is attached to the opening on the right side of the middle cavity of the piston cylinder 5, when the pressure inside the middle cavity of the piston cylinder 5 is high, the large-flow water inlet valve cores 504 are in a closed state, and when the centrifugal effect generated by the impeller 3 reduces the pressure inside the middle cavity of the piston cylinder 5, the large-flow water inlet valve cores 504 slide to the left side to open the right opening, and a large amount of water is fed.

Example 4:

in a preferred embodiment, filter screen clamping ring 7 is still including clamping ring operation groove 701, and ten sets of clamping ring operation grooves 701 have been seted up to the inboard of filter screen clamping ring 7, and the filter screen clamping ring 7 outside is the screw thread, and filter screen clamping ring 7 passes through screw thread and shell body 1 threaded connection, and in use conveniently operates filter screen clamping ring 7 through clamping ring operation groove 701.

The working principle of the self-priming centrifugal pump capable of treating gas-liquid mixed media is as follows: when the device is installed, the water inlet 201 is fixedly connected with the water suction pipeline, the water outlet 103 is connected with the water outlet pipeline, and the impeller driving shaft 303 is connected with the driving motor; when the centrifugal pump is used, the motor drives the impeller body 3 to rotate, the impeller body 3 drives the piston rod 4 to slide left and right through the cylindrical surface cam structure, the piston rod 4 pumps water into the piston cavity 501 from the piston water inlet 502 through the piston structure, the water is input into the cavity in the middle of the piston cylinder body 5 from the piston water outlet 503, the water in the cavity in the middle of the piston cylinder body 5 flows into the impeller body 3, the impeller body 3 generates a centrifugal effect through the rotation of the blades 304 to push the water to the outer side, so that centrifugal pumping is realized, when the pressure in the middle cavity of the piston cylinder body 5 is high in use, the large-flow water inlet valve core 504 is in a closed state, and when the centrifugal effect generated by the impeller body 3 reduces the pressure in the middle cavity of the piston cylinder body 5, the large-flow water inlet valve core 504 slides to the left side to open a right opening, so that a large amount of water is fed, and comprehensive water pumping of the centrifugal pump is realized; the in-process of pumping water filters the water that water inlet 201 flowed into through filter screen 6 that intakes, reduces the debris that get into the pump body, improves the life of centrifugal pump, and filter screen 6 uses a period and can clear up or change filter screen 6 that intakes through pulling down casing 2 and filter screen clamping ring 7 of will intaking when intaking.

In conclusion, the cylindrical surface cam transmission mechanism and the piston structure are adopted, water is synchronously extracted through the piston structure while the impeller body rotates, particularly, the water is sent into the impeller body through the piston structure to realize self-absorption at the initial starting stage of the water pump, when the medium is liquid, the water can be extracted through the centrifugal effect of the impeller body, and when the medium is gas, the water can be extracted through the piston, so that good work can be ensured in different media; meanwhile, the large flow is provided when the large flow is needed by adopting the large-flow water inlet valve core, and the piston structure and the centrifugal action are connected in series, so that the large lift is realized, the lift is greatly improved on the premise of ensuring the flow, the lift and the flow can meet the use requirement, and the use performance is improved; through setting up the liquid of filter screen to the water inlet of intaking, reduce the debris that get into the pump body, improve the life of centrifugal pump, and conveniently dismantle clearance and change, make things convenient for later maintenance management. The centrifugal pump can be used for dealing with different media such as gas, liquid and the like, has strong adaptability and strong self-suction capacity, can provide higher lift while ensuring sufficient flow, reduces sundries entering a pump body, prolongs the service life of the centrifugal pump, is convenient to disassemble, clean and replace, and is convenient for later maintenance and management.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a can handle self-priming centrifugal pump of gas-liquid mixture medium which characterized in that: the self-priming centrifugal pump capable of treating gas-liquid mixed media comprises an outer shell (1); the right side of the outer shell (1) is fixedly connected with a group of water inlet shells (2); a group of water outlets (103) is arranged at the top of the outer shell (1), and a group of water inlets (201) is arranged on the right side of the water inlet shell (2); a group of outer shell water inlet connecting flanges (102) are arranged on the right end face of the outer shell (1), a group of water inlet shell connecting flanges (202) are fixedly connected to the left end face of the water inlet shell (2), and the outer shell water inlet connecting flanges (102) are fixedly connected with the water inlet shell connecting flanges (202) through bolts; a group of impeller bodies (3) are rotatably connected inside the left side of the outer shell (1); the left end surface of the impeller body (3) is coaxially and fixedly connected with a group of impeller driving shafts (303); a group of piston cylinder bodies (5) are fixedly connected inside the right side of the outer shell (1); five groups of piston rods (4) are arranged in a sliding manner in a circumferential array in the piston cylinder body (5); the right end face of the piston rod (4) is fixedly connected with a group of piston sealing gaskets (403), five groups of piston cavities (501) are arranged in the piston cylinder body (5) in a circumferential array mode, and the piston sealing gaskets (403) slide in the piston cavities (501) to form a piston structure; the right inside of the outer shell (1) is connected with a group of water inlet filter screens (6) in a compression joint way through a filter screen compression ring (7),

the impeller body (3) also comprises blades (304), six groups of blades (304) are arranged inside the impeller body (3), the blades (304) are involute centrifugal blades,

a group of annular impeller guide grooves (302) are formed in the outer portion of the right side of the impeller body (3), the impeller body (3) is rotatably connected with the outer shell (1) through the impeller guide grooves (302),

two groups of piston guide grooves (402) are arranged on the outer side of the piston rod (4), the piston rod (4) is connected with the piston cylinder body (5) in a sliding way through the piston guide grooves (402),

the piston cylinder body (5) further comprises a piston water inlet (502) and a piston water outlet (503), a group of piston water inlets (502) are arranged on the right side of the piston cavity (501), a group of piston water outlets (503) are arranged on the inner side of the piston cavity (501), the opening of the piston water outlet (503) faces to the cavity in the middle of the piston cylinder body (5), a group of single valves are respectively arranged in the piston water inlet (502) and the piston water outlet (503), the one-way valve in the piston water inlet (502) opens to the piston cavity (501), the one-way valve in the piston water outlet (503) opens to the cavity in the middle of the piston cylinder body (5),

the inner side of the impeller body (3) is provided with a group of piston driving grooves (301), the piston driving grooves (301) are of an annular structure which can change left and right, a group of piston driving rollers (401) are arranged outside the left side of the piston rod (4), and the piston driving rollers (401) roll in the piston driving grooves (301) to form a cylindrical surface cam structure.

2. The self-priming centrifugal pump capable of treating a gas-liquid mixed medium as recited in claim 1, wherein: the piston cylinder body (5) middle cavity is internally and slidably connected with a set of large-flow water inlet valve core (504), the left side of the large-flow water inlet valve core (504) is elastically connected with the piston cylinder body (5) through a set of springs, and the right side of the large-flow water inlet valve core (504) is attached to an opening on the right side of the piston cylinder body (5) middle cavity.

3. The self-priming centrifugal pump capable of treating a gas-liquid mixed medium as claimed in claim 2, wherein: ten sets of clamping ring operation grooves (701) have been seted up to the inboard of filter screen clamping ring (7), the filter screen clamping ring (7) outside is the screw thread, filter screen clamping ring (7) pass through the screw thread with shell body (1) threaded connection.