CN115143143B

CN115143143B - Low-noise self-priming pump shell

Info

Publication number: CN115143143B
Application number: CN202210555167.9A
Authority: CN
Inventors: 颜成刚; 林荣
Original assignee: Leo Group Zhejiang Pump Co Ltd
Current assignee: Leo Group Zhejiang Pump Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2024-04-12
Anticipated expiration: 2042-05-20
Also published as: CN115143143A; WO2023221474A1

Abstract

The invention discloses a low-noise self-priming pump shell, wherein an impeller cavity with an impeller inside is arranged in a self-priming pump shell, a liquid inlet channel, a liquid outlet channel and a liquid return channel are arranged in the self-priming pump shell, the liquid inlet channel is provided with an inlet communicated with the impeller cavity, rib plates are arranged adjacent to the liquid inlet channel and the liquid outlet channel, a baffle plate is arranged adjacent to the liquid outlet channel, the upper ends of the liquid outlet channel and the liquid return channel are provided with communicated backflow cavities, the lower ends of the liquid outlet channel and the liquid return channel are provided with outlets communicated with the impeller cavity, the upper ends of the rib plates are provided with outer expansion plates arranged in a direction far away from the baffle plate, an expansion groove is formed between the outer expansion plates and the rib plates, the upper ends of the outer expansion plates are bent towards the side where the baffle plate is located, and the upper ends of the outer expansion plates are connected with the self-priming pump shell. The invention has the advantages that the suction lift and the lift of the self-priming pump can be considered under the condition of ensuring low noise, and the application capacity of the self-priming pump is improved.

Description

Low-noise self-priming pump shell

Technical Field

The application relates to the technical field of self-priming pumps, in particular to a low-noise self-priming pump shell.

Background

The self-priming pump has convenient operation, the stable benefit of operation, and self-priming pump is at the casing at first when using, and impeller rotation is inhaled air and water, and final gas-liquid separation, gas discharge, liquid reflux flow impeller circulation, therefore self-priming pump includes feed liquor passageway, drain passageway and liquid return passageway, and self-priming pump is because the inner loop that water and air mixed formed when using, because the density difference of medium can produce very big collision, forms the noise.

In the Chinese patent literature, the patent number CN202111605414.3 is published in 2022, 3 months and 1 days and is named as a pump body capable of effectively reducing noise and a self-priming pump, the application discloses a pump body capable of effectively reducing noise and a self-priming pump, the self-priming pump comprises a main body, a rib plate is arranged in the main body, the main body is divided into a liquid suction cavity, a self-priming cavity and an accelerating cavity connected with the liquid suction cavity and the self-priming cavity by the rib plate, an impeller is arranged in the accelerating cavity, and a liquid outlet channel communicated with the accelerating cavity and the self-priming cavity and a liquid inlet channel communicated with the accelerating cavity and the liquid suction cavity are formed between the rib plate and the inner wall of the main body; the liquid outlet channel is used for allowing water to flow into the liquid outlet channel from the inlet side of the liquid outlet channel and flow out from the outlet side of the liquid outlet channel; the liquid outlet channel has at least: opposite flaring, it locates at inlet side of the liquid outlet channel; a relatively narrow opening which is positioned at the outlet side of the liquid outlet channel, and the area size of the relatively narrow opening is smaller than that of the relatively expanding opening; and the middle flow passage is connected with the opposite flaring and the opposite narrow opening, and the volume of the middle flow passage is gradually reduced along the water flow direction.

The disadvantage of the prior art is that the arrangement of the relatively flaring and the relatively narrow opening, although possibly reducing noise, the sharp edge structure thereof is easy to shear water flow, thereby causing water flow bifurcation and seriously affecting the suction and the lift of the self-priming pump.

Disclosure of Invention

Based on the defects in the prior art, the invention provides the low-noise self-priming pump shell, and the suction lift and the lift of the self-priming pump can be considered under the condition of ensuring low noise, so that the application capacity of the self-priming pump is improved.

In order to achieve the above object, the present invention adopts the following technical scheme.

The utility model provides a self priming pump casing of low noise, is equipped with the impeller chamber of establishing the impeller in from inhaling the pump casing, is equipped with feed liquor passageway, drain passageway and back liquid passageway in from inhaling the pump casing, and the feed liquor passageway is equipped with the import in intercommunication impeller chamber, and feed liquor passageway and drain passageway are equipped with the floor adjacently, and drain passageway and back liquid passageway are equipped with the baffle adjacently, and the upper end of drain passageway and back liquid passageway is equipped with the backward flow chamber of intercommunication, and the lower extreme of drain passageway and back liquid passageway is equipped with the export in intercommunication impeller chamber, characterized by, the floor upper end is equipped with the outer expansion board that sets up to keeping away from the baffle direction, forms the dilatation groove between outer expansion board and the floor, and the upper end of outer expansion board is crooked towards baffle place side setting, and the upper end of outer expansion board is connected from inhaling the pump casing. In the prior art, the transverse baffle corresponding to the liquid outlet channel is arranged at the rear side of the rib plate, the transverse baffle is close to the liquid outlet channel in position, the impact is large, the rolling is strong, the water-gas separation efficiency can be improved, but noise is easy to occur, and large flow loss exists.

Preferably, the position of the upper end of the rib plate corresponding to the expansion groove is an expansion surface, the expansion surface is a plane perpendicular to the baffle plate, and a transition fillet is arranged between the expansion surface and the side surface of the outer expansion plate. The reliability of the expansion tank is ensured.

Preferably, the expansion surface is correspondingly arranged at the middle section of the trisection height of the baffle. The water flow flows into the diffusion tank after the impact of the liquid outlet channel, and the corresponding position of the expansion surface is the position of the water flow entering the diffusion tank from the liquid outlet channel.

Preferably, the impeller cavity peripheral wall is provided with a flow guide sharp corner corresponding to the outlet. The water conservancy diversion closed angle has the effect of reliable conflux direction, guarantees the direction uniformity of rivers outflow, in order to improve structural life in the traditional scheme, sets up the transition fillet generally, but the transition fillet can lead to rivers dispersion for rivers that the impeller intracavity launched out and the rivers in the return liquid passageway interfere conflict each other, cause rivers kinetic energy internal consumption, and then influence self priming pump's suction head and lift, this problem has been avoided in the design of this application.

Preferably, the lower end of the baffle is positioned on a tangent line of the peripheral wall of the impeller cavity at the guide sharp angle. The position of the baffle can influence the damage of the kinetic energy of the water body, if the baffle is too high, water vapor can be reflected to the vicinity of the liquid return channel after colliding with the six-head, and the water vapor is turned at the communication part of the liquid return channel and the liquid outlet channel, so that the water filling and the gas-liquid separation of the impeller are influenced; baffle setting is too low, can have partial steam to be blocked into the liquid return channel, can influence impeller filling and vapour-liquid separation equally, and the reliable direction of this application selected position cooperation water conservancy diversion closed angle for as much as possible steam can not directly flow into the liquid return channel from the impeller chamber, guarantees vapour-liquid separation efficiency, improves from inhaling the pump suction.

Preferably, the lower end of the baffle is provided with a semicircular transition section. The transition section forms smooth transition, so that noise generated by water flow collision can be reliably reduced.

Preferably, the side surface of the rib plate is provided with a flow guide surface corresponding to the liquid outlet channel, an included angle a exists between the flow guide surface and a tangent line of the peripheral wall of the impeller cavity at the flow guide sharp angle, and the included angle a ranges from 20 degrees to 40 degrees. In the prior art, no flow guide surface exists, the included angle between the incident water flow of the peripheral wall of the impeller cavity and the side surface of the rib plate is large, the included angle is 50 DEG upwards, the water flow is reflected at the inlet end of the liquid outlet channel for multiple times, the kinetic energy internal consumption of the water flow is serious, the noise is large, the water return efficiency is low, the absorption Cheng Shichang of the self-priming pump is affected, after the flow guide surface is arranged, the collision times of the water flow in the liquid outlet channel can be controlled, the water body can collide in the liquid outlet channel, the advancing speed of the water body can be ensured, the accumulation of kinetic energy liquid in the liquid outlet channel is prevented, the outflow of the water body is affected, the gas-liquid separation efficiency is improved, and the impact and noise are reduced.

Preferably, the self-priming pump shell is provided with a downstream groove on the wall surface corresponding to the upper end of the outlet, the downstream groove is arc-shaped, and a tangent line at the lower end of the downstream groove is tangent with the lower end of the baffle. The water body is guided, the smooth backflow of the water body is more convenient, and the noise is reduced.

The invention has the following beneficial effects: under the condition of ensuring low noise, the suction lift and the lift of the self-priming pump can be considered, and the application capacity of the self-priming pump is improved.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention.

Fig. 2 is an enlarged schematic view at a in fig. 1.

FIG. 3 is a schematic illustration of the internal flow direction of the present invention.

In the figure: the impeller of the self priming pump shell 12, the liquid inlet channel 4, the liquid outlet channel 5, the back flow channel 6, the baffle 9, the transition section 91, the back flow channel 10, the outlet 11, the straight plate 13, the arc plate 14, the expansion groove 15, the expansion surface 16, the transition fillet 17, the flow guiding sharp corner 18, the flow guiding surface 19 and the forward flow groove 20.

Detailed Description

The invention is further illustrated in the following, in conjunction with the accompanying drawings and specific embodiments.

In the case of example 1,

as shown in fig. 1 to 3, a self-priming pump housing with low noise is provided with an impeller cavity 3 with an impeller 2 inside, a liquid inlet channel 4, a liquid outlet channel 5 and a liquid return channel 6 are arranged in the self-priming pump housing 1, the liquid inlet channel 4 is provided with an inlet 7 communicated with the impeller cavity 3, the liquid inlet channel 4 and the liquid outlet channel 5 are adjacently provided with a rib plate 8, the liquid outlet channel 5 and the liquid return channel 6 are adjacently provided with a baffle 9, the upper ends of the liquid outlet channel 5 and the liquid return channel 6 are provided with a communicated backflow cavity 10, the lower ends of the liquid outlet channel 5 and the liquid return channel 6 are provided with an outlet 11 communicated with the impeller cavity 3, an expansion groove 15 is formed between the outer expansion plate 12 and the rib plate 8, the position of the upper end of the rib plate 8 corresponding to the expansion groove 15 is an expansion surface 16, the expansion surface 16 is a plane perpendicular to the baffle 9, and the expansion surface 16 is correspondingly arranged at the middle section of the three-equal heights of the baffle 9. In this embodiment, the expansion surface 16 corresponds to the middle position of the baffle 9. A transition fillet 17 is provided between the expansion surface 16 and the side of the outer expansion plate 12. The upper end of the outer expansion plate 12 is bent towards the side of the baffle plate 9, and the upper end of the outer expansion plate 12 is connected with the self-priming pump housing 1. Specifically, the outer expansion plate 12 comprises a straight plate 13 connected with the rib plate 8 and an arc plate 14 tangentially connected with the straight plate 13, and the upper end of the arc plate 14 is connected with the self-priming pump housing 1. The central angle of the side of the arcuate plate 14 facing the return chamber 10 is 50 degrees. The peripheral wall of the impeller cavity 3 is provided with a flow guiding sharp angle 18 corresponding to the outlet 11. The flow guiding sharp angle 18 is a right angle. The flow-guiding tip 18 is in the initial position of the impeller chamber 3 where the water flows out. The lower end of the baffle plate 9 is positioned on a tangent line of the peripheral wall of the impeller cavity 3 at the flow guiding sharp angle 18. The lower end of the baffle 9 is provided with a transition section 91 with a semicircular cross section. The side of the rib plate 8 is provided with a flow guiding surface 19 corresponding to the liquid outlet channel 5, an included angle a exists between the flow guiding surface 19 and a tangent line of the peripheral wall of the impeller cavity 3 at the flow guiding sharp angle 18, in fig. 2, the tangent line of the wall surface of the impeller cavity 3 at the flow guiding sharp angle 18 is represented by a two-dot chain line, and the included angle a ranges from 20 degrees to 40 degrees. In this embodiment, the included angle a is 35 degrees. The self-priming pump housing 1 is provided with a downstream groove 20 on the wall surface corresponding to the upper end of the outlet 11, namely, the lower end of the liquid return channel 6 is provided with the downstream groove 20. The downstream groove 20 is arc-shaped, and a tangent line at the lower end of the downstream groove 20 is tangent with the lower end of the baffle plate 9. In fig. 2, a tangential line at the lower end of the forward flow tank 20 is also indicated by a two-dot chain line.

This application is when self priming pump initial use, fill full water earlier in the self priming pump casing 1, impeller 2 receives motor drive rotation, the interior water of impeller chamber 3 removes to backward flow chamber 10 from liquid passageway 5, form negative pressure environment in the feed liquor passageway 4, inhale the air in the inlet channel that the self priming pump links to, the air-liquid mixture is incident to liquid passageway 5 from water conservancy diversion closed angle 18, the fluid that the air-liquid mixture formed and water conservancy diversion face 19 department radial reflection, rebound to baffle 9, just flow into dilatation groove 15 after once reflecting through baffle 9 afterwards, the arc 14 guide rebound through outer expansion plate 12 upper end flows into liquid return channel 6, realize the water circulation. According to the self-priming pump, on the basis of removing the transverse baffle plate 9, the capacity-expanding groove 15 is designed, so that a gas-liquid mixture flowing out of the rear end of the liquid outlet channel 5 rapidly enters into the large-section low pressure of the capacity-expanding groove 15 from the small-section high pressure of the liquid outlet channel 5, the water-gas separation effect is high, meanwhile, the flow loss can be reduced, the impact of water flow and the pump body is reduced, the noise is reduced, and the suction stroke of the self-priming pump can be increased; the cooperation of dilatation groove 15 and water conservancy diversion face 19 can control rivers and can collide the number of times at drain channel 5, and the water can collide in drain channel 5, can guarantee the speed that the water gos forward simultaneously, prevents that kinetic energy liquid from piling up in drain channel 5 and influencing the outflow of water, improves gas-liquid separation's efficiency, further reduces impact and noise.

Claims

1. The self-priming pump shell with low noise is characterized in that an impeller cavity with an impeller arranged inside is arranged in the self-priming pump shell, a liquid inlet channel, a liquid outlet channel and a liquid return channel are arranged in the self-priming pump shell, the liquid inlet channel is provided with an inlet communicated with the impeller cavity, a rib plate is arranged adjacent to the liquid inlet channel and the liquid outlet channel, a baffle plate is arranged adjacent to the liquid outlet channel, a communicated backflow cavity is arranged at the upper ends of the liquid outlet channel and the liquid return channel, and an outlet communicated with the impeller cavity is arranged at the lower ends of the liquid outlet channel and the liquid return channel;

the peripheral wall of the impeller cavity is provided with a flow guide sharp corner corresponding to the outlet;

the side of the rib plate is provided with a flow guide surface corresponding to the liquid outlet channel, an included angle a exists between the flow guide surface and a tangent line of the peripheral wall of the impeller cavity at the flow guide sharp angle, and the included angle a ranges from 20 degrees to 40 degrees.

2. The low-noise self-priming pump housing according to claim 1, wherein the rib plate upper end is provided with a capacity expansion surface corresponding to the capacity expansion groove, the capacity expansion surface is a plane perpendicular to the baffle plate, and a transition fillet is arranged between the capacity expansion surface and the outer expansion plate side surface.

3. The low noise self priming pump housing according to claim 2, wherein said expansion surface is disposed at a middle section of a height of three equal divisions of the baffle plate.

4. The low noise self priming pump housing of claim 1, wherein said baffle lower end is located on a tangent line of the impeller chamber peripheral wall at the flow directing point.

5. The low noise self priming pump housing of claim 1, wherein said baffle has a semicircular transition section at a lower end thereof.

6. The low-noise self-priming pump housing according to claim 1 or 5, wherein the wall surface of the upper end of the corresponding outlet of the self-priming pump housing is provided with a downstream groove, the downstream groove is circular arc-shaped, and a tangent line of the lower end of the downstream groove is tangent with the lower end of the baffle.