CN108869312B

CN108869312B - Self-priming pump

Info

Publication number: CN108869312B
Application number: CN201810628300.2A
Authority: CN
Inventors: 蒋秉邑
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-06-19
Filing date: 2018-06-19
Publication date: 2020-08-25
Anticipated expiration: 2038-06-19
Also published as: CN108869312A

Abstract

The invention discloses a self-priming pump, which comprises a pump body, an impeller and a motor, wherein the impeller comprises a front impeller plate, a rear impeller plate and a plurality of involute flow guide ribs which are uniformly distributed on the circumference and are arranged between the front impeller plate and the rear impeller plate; a water outlet cavity is formed between every two adjacent involute guide ribs, a plurality of gaps are evenly distributed on the outer wall of the front impeller plate in the circumferential direction, and the plurality of gaps correspond to the plurality of water outlet cavities one to one. The self-sucking pump can suck water in the water inlet channel into the impeller chamber quickly, improve the water sucking speed and discharge air quickly.

Description

Self-priming pump

Technical Field

The invention relates to a self-priming pump.

Background

Generally, a water inlet and a water outlet of a self-priming pump body are on the same horizontal line, the water inlet and the water outlet are arranged on two side surfaces of the pump body and are respectively and correspondingly communicated with a water inlet cavity and a water outlet cavity, the water inlet cavity is connected with a water inlet channel, the water outlet cavity is connected with a water outlet channel, an impeller chamber is arranged between the water inlet channel and the water outlet channel, the water outlet cavity is also connected with a backflow channel, and the backflow channel is communicated with the impeller chamber, as shown in fig. 1, when the work is finished, water in the water outlet cavity 103 is discharged from the water outlet, so that air with larger volume is accumulated in the water outlet cavity, when the water pump is reused and started, municipal water with certain water pressure enters from the water inlet and is mixed with a certain amount of air, and finally enters the impeller chamber 102, then the water mixed with the air enters the water outlet cavity 103, and because the air is light, the air is firstly discharged, one part enters the impeller chamber 102 again, and the other part is extruded to the water inlet cavity 101, so that a large amount of water cannot be accumulated in the impeller chamber 102 in a short time, and the air in the water outlet cavity 103 is mixed with the water in the impeller chamber 102 and then enters the water outlet cavity 103 again, so that the air can be discharged from the water outlet of the pump body in a full-hydraulic mode after several rounds. The pump body of above-mentioned structure, impeller structure is comparatively conventional, can not form stronger water-absorbing capacity in the impeller chamber, and unable quick discharges the air for self priming pump's suction stroke is low, and energy loss is big, and economic nature is not high.

Disclosure of Invention

The invention aims to solve the technical problem of providing a self-sucking pump which can realize quick water sucking, improve the water sucking speed of the self-sucking pump and improve the suction stroke.

In order to solve the technical problems, the invention discloses a technical solution of a self-priming pump, which comprises the following steps:

a self-priming pump comprises a pump body, an impeller and a motor, wherein a water inlet channel, an impeller chamber and a water outlet channel are arranged in the pump body, and the impeller chamber is communicated with the water outlet channel; a backflow channel and a pressure tank channel are communicated with the water outlet channel branch, the pressure tank channel is communicated with the pressure tank, the backflow channel is communicated to the impeller chamber, and a confluence point is formed at the junction of the backflow channel and the impeller chamber; the impeller comprises a front impeller plate, a rear impeller plate and a plurality of involute flow guide ribs which are uniformly distributed on the circumference and are arranged between the front impeller plate and the rear impeller plate, a shaft fixing flange is arranged at the center of the rear impeller plate, a motor rotating shaft is connected with the shaft fixing flange, a gap is formed between the inner end of each involute flow guide rib and the shaft fixing flange, an impeller opening ring is arranged at the center of the front impeller plate, and the impeller opening ring is communicated with a perfusion channel formed by a plurality of gaps; a water outlet cavity is formed between every two adjacent involute flow guide ribs, a plurality of notches are uniformly distributed on the outer wall of the front impeller plate in the circumferential direction, and the plurality of notches correspond to the plurality of water outlet cavities one by one; the impeller opening ring is inserted into the outlet of the water inlet channel, and the water inlet channel is communicated with the impeller.

The gap is a rhinoceros horn-shaped drainage area which is formed by enclosing a line segment A of the outer wall of the front impeller plate, a line segment B extending towards the center of the impeller from the outer end of the involute flow guide rib and an inscribed arc line segment C of the outer wall of the front impeller plate.

The confluence point of the backflow channel to the impeller chamber is matched and corresponds to a circular path formed by the roots of the notches.

Preferably, the confluence point is disposed at the lowest point of the circular path.

The impeller mouth ring outer wall cover is equipped with the sealing washer, the outer wall matching of sealing washer is at the inhalant canal inner wall.

And a flow deflector is arranged between every two adjacent flow guiding ribs, and the arc track of the flow deflector is intersected with the outer end point of each flow guiding rib.

The invention can achieve the technical effects that:

compared with the prior art, the self-priming pump has the following advantages: 1. the impeller is provided with the notch, and when the self-priming pump initially works, negative pressure is generated at the root of the notch, so that water in the water inlet channel can be quickly sucked into the impeller chamber, the water suction speed is improved, and air is quickly discharged; 2. the notch on the impeller improves the water throwing amount in unit time when the impeller rotates; 3. the confluence point from the backflow channel to the impeller chamber is matched with and corresponds to the root of the water drainage region, and negative pressure is generated at the root of the water drainage region, so that water in the backflow channel can be quickly sucked into the impeller chamber, and the water pumping speed is improved; 4. and after the self-priming pump operates normally, the impeller chamber is filled with high-pressure water which can be discharged from the backflow channel and the water outlet channel respectively.

Drawings

The invention is described in further detail below with reference to the following figures and detailed description:

FIG. 1 is a schematic diagram of a background art configuration;

FIG. 2 is an angled exploded perspective view of the self-primer pump of the present invention;

FIG. 3 is another perspective exploded view of the self-primer pump of the present invention;

FIG. 4 is a cross-sectional view of the self-primer pump of the present invention;

FIG. 5 is an exploded perspective view of the impeller of the present invention;

FIG. 6 is a schematic plan view of the impeller of the present invention;

fig. 7 is a schematic structural view of an impeller having a guide vane according to the present invention.

Detailed Description

Referring to fig. 2 to 7, the present invention provides a self-priming pump, including a pump body 1, an impeller 2 and a motor 3, wherein the pump body 1 is provided with a water inlet channel 4, an impeller chamber 5 and a water outlet channel 6, and the impeller chamber 5 is communicated with the water outlet channel 6; a backflow channel 7 and a pressure tank channel are communicated with the water outlet channel 6 in a branched mode, the pressure tank channel is communicated with a pressure tank 9, the backflow channel 7 is communicated with the impeller chamber 5, and a confluence point 10 is formed at the junction of the backflow channel 7 and the impeller chamber 5; the impeller 2 comprises a front impeller plate 11, a rear impeller plate 12 and a plurality of involute flow guide ribs 13 which are uniformly distributed on the circumference and arranged between the front impeller plate 11 and the rear impeller plate 12, wherein a shaft fixing flange 14 is arranged at the center of the rear impeller plate 12, a motor rotating shaft (not marked in the figure) is connected with the shaft fixing flange 14, a gap 15 is formed between the inner end of the involute flow guide ribs 13 and the shaft fixing flange 14, an impeller opening ring 16 is arranged at the center of the front impeller plate 11, and the impeller opening ring 16 is communicated with a perfusion channel formed by the plurality of gaps 15; a water outlet cavity 17 is formed between every two adjacent involute flow guide ribs 13, a plurality of gaps 18 are uniformly distributed on the outer wall of the front impeller plate 11 in the circumferential direction, and the plurality of gaps 18 correspond to the plurality of water outlet cavities 17 one by one; the impeller opening ring 16 is inserted into the outlet 19 of the water inlet channel 4, and the water inlet channel 4 is communicated with the impeller 2.

The notch 18 is a rhinoceros horn-shaped drainage area formed by a line segment A20 of the outer wall of the front impeller plate 11, a line segment B21 extending from the outer end of the involute flow guide rib 13 to the center of the impeller 2 and an inscribed arc line segment C22 of the outer wall of the front impeller plate 11.

The confluence point 10 of the return channel 7 to the impeller chamber 5 is matched and corresponds to the circular path formed by the root 23 of the notches 18. Preferably, the efficiency of water fall back is improved by locating the confluence point 10 at the lowest point of the circular path due to the gravity of the water.

The outer wall of the impeller opening ring 16 is sleeved with a sealing ring (not shown in the figure), and the outer wall of the sealing ring (not shown in the figure) is matched with the inner wall of the water inlet channel 4. The sealing ring (not shown) enables the water pressure in the water inlet channel 4 to enter the impeller 2 in a full-pressure mode, and the occurrence of water pressure dispersion caused by gaps is reduced.

A flow deflector 27 is further arranged between the two adjacent flow guiding ribs 13, and the arc track of the flow deflector 27 is intersected with the outer end point of the flow guiding rib 13. When the impeller 2 rotates at a high speed, the water pressure borne by the extrados 28 and the intrados 29 of the flow guide ribs 13 is unbalanced, and the flow guide sheet 27 can enable a part of the water pressure to impact the extrados 28, so that the water pressure is balanced.

The working principle of the self-priming pump of the present invention is explained as follows:

according to the self-sucking pump, tap water enters the water inlet channel 4 from the water inlet 25 of the pump body 1, flows into the water outlet cavity 17 of the impeller 2 through the water inlet channel 4, then enters the impeller chamber 5, is pressurized by the impeller 2, and is discharged through the water outlet channel 6, and when the water outlet channel 6 is filled with water, the self-sucking pump pumps water at full water pressure. Before the self-priming pump is started, a large amount of air is accumulated in the water outlet channel 6 and the external pipeline, after the self-priming pump is started, the impeller 2 rotates at a high speed, so that water initially reserved in the impeller chamber 5 is thrown up and rushes to the water outlet channel 6, in the process, a negative pressure area 24 (indicated by a dotted line circle in figure 6) is formed by diffusing around the root 23 of the notch 18 of the impeller 2, the negative pressure area 24 has suction to the water inlet channel 4, so that the air in the external pipeline enters the water outlet cavity 17 of the impeller 2 through the water inlet channel 4 and the impeller opening ring 16, the air and the water in the impeller chamber 5 are mixed and enter the water outlet channel 6, the water-air mixture in the water outlet channel 6 is firstly discharged due to light gas, and the air is just corresponding to the confluence point 10 from the backflow channel 7 to the impeller chamber 5 due to the negative pressure area 24 formed by the root 23 of the notch 18 of the impeller 2, therefore, the negative pressure area 24 has suction to the backflow channel 7, water in the drainage channel 0 falls back through the backflow channel 7 and rushes to the notch 18 of the impeller 2, when the notch 18 of the impeller 2 is filled with water, and the water is spun at high speed, so that negative pressure is continuously generated at the notch 18 of the impeller 2, all air is finally pumped in and discharged, and then water in an external pipeline is quickly pumped to the impeller chamber 5, so that the water suction speed of the self-priming pump is increased, and the suction stroke of the self-priming pump is improved; when the self-priming pump operates normally, the notch 18 of the impeller 2 has thrust on water in the impeller chamber 5, and high-pressure water can flow out through the water outlet channel 6 normally and can flow out through the backflow channel 7, so that the working efficiency of the self-priming pump is improved.

According to the self-priming pump, the sealing ring (not shown in the figure) on the outer wall of the impeller opening ring 16 plays a role in sealing the water inlet channel 4 and the impeller chamber 5, water in the water inlet channel 4 can only enter the impeller chamber 5 through the impeller opening ring 16, the self-priming capability of the water inlet channel 4 when the impeller 2 rotates is improved, in addition, the flow and the lift of the self-priming pump are also improved, and the working efficiency of the self-priming pump is improved.

In conclusion, the self-priming pump achieves the purpose of self-priming through the notch 18 structure of the impeller 2, meanwhile, the notch 18 structure of the impeller 2 has a centrifugal effect on water in the impeller chamber 5 and the impeller 2, so that a part of pressurization effect is achieved, the self-priming pump can be used as a centrifugal pump, is multipurpose, can be suitable for different environments and has a wide market prospect.

The self-priming pump provided by the embodiment of the invention is described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the embodiment is only used for helping to understand the technical scheme disclosed by the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. A self-priming pump comprises a pump body, an impeller and a motor, wherein a water inlet channel, an impeller chamber and a water outlet channel are arranged in the pump body, and the impeller chamber is communicated with the water outlet channel; the water outlet channel branch is communicated with a backflow channel and a pressure tank channel, the pressure tank channel is communicated with a pressure tank, the backflow channel is communicated to the impeller chamber, and a confluence point is formed at the junction of the backflow channel and the impeller chamber, and the water outlet channel is characterized in that: the impeller comprises a front impeller plate, a rear impeller plate and a plurality of involute flow guide ribs which are uniformly distributed on the circumference and are arranged between the front impeller plate and the rear impeller plate, a shaft fixing flange is arranged at the center of the rear impeller plate, a motor rotating shaft is connected with the shaft fixing flange, a gap is formed between the inner end of each involute flow guide rib and the shaft fixing flange, an impeller opening ring is arranged at the center of the front impeller plate, and the impeller opening ring is communicated with a perfusion channel formed by a plurality of gaps; a water outlet cavity is formed between every two adjacent involute flow guide ribs, a plurality of notches are uniformly distributed on the outer wall of the front impeller plate in the circumferential direction, and the plurality of notches correspond to the plurality of water outlet cavities one by one; the impeller opening ring is inserted at the outlet of the water inlet channel, and the water inlet channel is communicated with the impeller; the notch is a rhinoceros horn-shaped drainage area formed by enclosing a line segment A of the outer wall of the front impeller plate, a line segment B extending from the outer end of the involute flow guide rib towards the center of the impeller and an inscribed arc line segment C of the outer wall of the front impeller plate; the confluence point of the backflow channel to the impeller chamber is matched and corresponds to a circular path formed by the roots of the notches.

2. The self-primer pump of claim 1 wherein: the confluence point is arranged at the lowest point of the circular path.

3. The self-primer pump of claim 1 wherein: the impeller mouth ring outer wall cover is equipped with the sealing washer, the outer wall matching of sealing washer is at the inhalant canal inner wall.

4. The self-primer pump of claim 1 wherein: and a flow deflector is arranged between the two adjacent involute flow guide ribs, and the arc track of the flow deflector is intersected with the outer end point of the flow guide rib.