CN114396111B

CN114396111B - Sewage lifting device

Info

Publication number: CN114396111B
Application number: CN202111631502.0A
Authority: CN
Inventors: 张建文; 李平洲
Original assignee: Wilo China Water Pump System Co Ltd
Current assignee: Wilo China Water Pump System Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2024-02-06
Anticipated expiration: 2041-12-28
Also published as: CN114396111A

Abstract

The application relates to a sewage lifting device, which comprises a shell, a driving piece and a jacket; the shell comprises a water inlet and a water outlet; the jacket is coated on the driving piece and forms an accommodating space with the outer wall of the driving piece; the containing space is respectively communicated with the water outlet and the water inlet through different passages. The present application has an effect of being able to operate for a long time in a dry environment.

Description

Sewage lifting device

Technical Field

The present application relates to the field of fluid delivery devices, and in particular to a sewage lifting device.

Background

In large buildings where the flow rate of people is dense, such as subway stations, large shops, hospitals, etc., the sewage generation rate is high, and pumps for transferring sewage are required to have continuous operation capability and high reliability. The current common proposal is to adopt a submersible sewage pump to transfer sewage.

With respect to the above prior art, the inventors consider that: when the submersible sewage pump is installed in a dry environment, the heat dissipation condition is poor, and in long-time continuous operation, the motor of the submersible sewage pump can generate heat for a long time, so that the risk of damage and even burnout exists.

Disclosure of Invention

In order to perform long-term stable and effective cooling on a pump installed in a dry environment, the application provides a sewage lifting device.

The application provides a sewage lifting device adopts following technical scheme:

a sewage lifting device comprises a shell, a driving piece and a jacket; the shell comprises a water inlet and a water outlet; the jacket is coated on the driving piece and forms an accommodating space with the outer wall of the driving piece; the containing space is respectively communicated with the water outlet and the water inlet through different passages.

Through adopting above-mentioned technical scheme, in the use, the impeller dead axle in the drive piece drive casing rotates, inhales the medium from the water inlet and discharges from the delivery port. In the process, the pressure of the water inlet is lower than that of the water outlet, so that part of medium at the water outlet can enter the accommodating space between the jacket and the outer wall of the driving piece through the passage and is discharged to the water inlet through the other passage after contacting with the outer wall of the driving piece. The medium which absorbs the heat of the driving piece can be driven by the impeller to be discharged from the water outlet along with the medium at the water inlet. In the process, the impeller drives the medium to transfer and simultaneously cools the driving piece through the medium, namely, the driving piece can be cooled on the premise that the impeller works without an additional cooling system, the possibility of long-time work burning of the driving piece can be reduced, and the reliability of the device is improved.

Optionally, the passage for communicating the water outlet with the accommodation space is located at the top of the driving member, and the passage for communicating the water inlet with the accommodation space is located at the bottom of the driving member.

By adopting the technical scheme, the medium at the water outlet can flow downwards under the action of gravity after entering the accommodating space, namely, the medium can flow on the outer wall of the driving piece and then is discharged to the water inlet. The medium flowing into the accommodating space is fully contacted with the outer wall of the driving part, so that longer heat exchange can be realized between the medium and the outer wall of the driving part, and the cooling effect of the driving part is improved.

Optionally, a water return pipe which communicates the accommodating space with the water inlet is fixedly connected to the shell.

Through adopting above-mentioned technical scheme, the medium that has accomplished the heat exchange in for accommodation space through the wet return provides the passageway that flows to the water inlet, and in the in-process that the medium got into accommodation space can bring partial impurity into accommodation space, the staff can clear up accommodation space through dismantling the wet return, reduces in the accommodation space impurity precipitation and then influences the possibility of radiating effect.

Optionally, the medium flowing direction of the water return pipe at the water inlet is arranged at an acute angle with the medium flowing direction at the water inlet.

Through adopting above-mentioned technical scheme, the medium flow direction of water inlet direction is outside towards impeller direction, and the medium flow direction of the tip of wet return here is also towards impeller direction, for other setting methods, the hindrance of the medium that receives from water inlet department flow in the time of the wet return medium outflow wet return that above-mentioned scheme can reduce for the medium in the wet return can smoothly get into water inlet department, has improved the reliability of the device.

Optionally, a control gap communicated with the accommodating space is formed between the edge of the impeller and the inner wall of the shell at the water outlet.

Through adopting above-mentioned technical scheme, through the size of rational configuration control clearance, can filter through the large granule impurity that medium carried in the control clearance will get into accommodation space, further reduce in the accommodation space impurity deposit and then influence the possibility of radiating effect.

Optionally, the medium flowing direction of the control gap is arranged at an acute angle with the medium flowing direction of the water outlet.

Through adopting above-mentioned technical scheme, the medium flow direction of delivery port direction is the impeller towards outside, and the medium flow direction of control gap here also is deviating from the impeller direction, for other setting methods, the hindrance of the medium that receives when the medium flows in to the control gap to the outside medium that flows of delivery port for in the medium can be stable and more entering control gap, the reliability and the cooling effect of the device have been improved.

Optionally, an annular flow channel surrounding the impeller is formed on the inner wall of the shell, and one end of the control gap is located on the side wall of the annular flow channel.

Through adopting above-mentioned technical scheme, the medium can form the swirl that turns to the same with the impeller in annular runner under the drive of blade, has bigger lift in comparison with the volumetric pump of same specification, and is insensitive to the pressure fluctuation in the system than other commonly used pump bodies simultaneously, is applicable to the sewage transfer transportation in places such as market, hospital, school.

Optionally, a high-pressure water channel for communicating the control gap with the accommodating space is arranged on the shell.

Through adopting above-mentioned technical scheme, can be with control clearance and accommodation space intercommunication through the high-pressure water channel for the high-pressure medium of outlet department can smoothly get into and hold empty inside, and then realizes heat exchange with the driving piece.

Optionally, the impeller includes a back cover plate, and the control gap is located between the back cover plate and the inner wall of the housing.

Through adopting above-mentioned technical scheme, the setting of control clearance is realized through the back shroud of impeller and the assembly clearance between the casing, need not reprocess current part, and can further adjust the size of control clearance through forms such as increase sealing washer, and assembly processing is convenient, and the cost is lower, and the suitability is high.

Optionally, a retaining ring for increasing the control gap length is fixedly connected to the back cover plate.

Through adopting above-mentioned technical scheme, the setting of retaining ring has increased the length of control gap, compares in the shorter control gap of length, and above-mentioned scheme can effectively hinder through control gap open-ended impurity because of receiving the high pressure that the medium carried, has reduced the impurity that carries in the high pressure medium and has got into the possibility in the accommodation space, reduces the impurity precipitation and then influences the possibility of radiating effect in the accommodation space promptly.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the use process, the driving piece drives the impeller fixed shaft to rotate, and the medium is sucked in from the water inlet and discharged from the water outlet. In the process, the pressure of the water inlet is lower than that of the water outlet, so that part of medium at the water outlet can enter the accommodating space between the jacket and the outer wall of the driving piece through the passage and is discharged to the water inlet through the other passage after contacting with the outer wall of the driving piece. The medium which absorbs the heat of the driving piece can be driven by the impeller to be discharged from the water outlet along with the medium at the water inlet. In the process, the impeller drives the medium to transfer and the driving piece is cooled through the medium, namely, the driving piece can be cooled on the premise that a cooling system is not needed to be additionally arranged only by the operation of the impeller, the possibility of long-time operation and burning of the driving piece can be reduced, and the reliability of the device is improved;

2. the medium can form the same longitudinal vortex with the impeller turning in the annular flow passage under the drive of the blades, has larger lift compared with a volumetric pump with the same specification, is insensitive to pressure fluctuation in the system compared with other commonly used pump bodies, and is suitable for sewage transfer transportation in places such as markets, hospitals and schools.

Drawings

Fig. 1 is a cross-sectional view showing the positions of the respective members in the first embodiment.

Fig. 2 is an enlarged view of a portion a of fig. 1 showing a configuration for controlling a gap.

Fig. 3 is a cross-sectional view showing the positions of the respective components in the embodiment.

Fig. 4 is an enlarged view of a portion B of fig. 3 showing another configuration of the control gap.

Reference numerals illustrate: 1. a housing; 11. a volute; 111. a water outlet; 12. a water inlet base; 121. a water inlet; 13. an annular flow passage; 131. a retainer ring; 14. a shell body; 2. a driving member; 3. an impeller; 31. a back cover plate; 4. an accommodation space; 5. a jacket; 6. a water return pipe; 7. controlling the gap; 8. a high pressure water passage.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art under the premise of understanding the inventive concept of the present invention are all within the scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In order to facilitate understanding of the sewage lifting device provided by the embodiment of the application, an application scene of the sewage lifting device is described first. The embodiment of the application describes a sewage lifting device which is used in the sewage transportation process and aims at solving the problems that a submersible sewage pump in the related art is installed in a dry environment and has poor heat dissipation effect after long-time working, so that a motor is burnt. The utility model provides a sewage hoisting device who records can realize the heat dissipation through sewage when transporting sewage, has reduced the possibility that the pump body works for a long time and leads to burning out in the dry-type environment.

The embodiment of the present application discloses a sewage lifting device, referring to fig. 1 and 2, fig. 1 is a cross-sectional view showing the positions of the components in the first embodiment, and fig. 2 is an enlarged view of a portion a showing the structure of a control gap 7 in fig. 1. The sewage lifting device comprises a shell 1, a driving piece 2 and an impeller 3; the housing 1 comprises a water inlet 121 and a water outlet 111; the driving piece 2 is fixedly connected with the shell 1 and is used for driving the impeller 3 to rotate in a fixed shaft manner.

Specifically, the casing 1 includes a casing body 14, a volute 11 fixedly connected to the casing body 14, and a water inlet base 12 fixedly connected to the casing body 14; wherein the housing 14 is hollow, the volute 11 is provided with a water outlet 111 communicated with the interior of the housing 14, and the water inlet base 12 is provided with a water inlet 121 communicated with the interior of the housing 14. The driving piece 2 is fixedly connected (or bolted) on the shell 14, and an output shaft of the driving piece 2 is fixedly connected with the impeller 3 coaxially, and the impeller 3 is arranged in the shell 14 and driven by the driving piece 2 to rotate in a fixed shaft manner, so that the medium at the water inlet 121 is pressurized and transferred and transported through the water outlet 111. In this embodiment, the driving member 2 is a motor, and an output shaft of the motor extends into the housing 14 and is fixedly connected with the impeller 3 coaxially, and the output shaft of the motor is rotationally sealed with the housing 14.

The sewage lifting device further comprises a jacket 5, wherein the jacket 5 is coated on the driving piece 2 and forms an accommodating space 4 with the outer wall of the driving piece 2; the receiving space 4 communicates with the water outlet 111 and the water inlet 121 via different passages, respectively.

Illustratively, the casing 1 is fixedly connected with a water return pipe 6 for communicating the accommodating space 4 with the water inlet 121, a control gap 7 communicated with the accommodating space 4 is formed between the edge of the impeller 3 and the inner wall of the casing 1 at the water outlet 111, a high-pressure water channel 8 for communicating the control gap 7 with the accommodating space 4 is arranged on the casing 1, the impeller 3 comprises a rear cover plate 31, and the control gap 7 is located between the rear cover plate 31 and the inner wall of the casing 1.

Specifically, the jacket 5 is sleeved outside the driving piece 2 in a sleeve shape, two ends of the jacket 5 are respectively and hermetically connected (or fixedly connected) with the shell 14 and the outer wall of the driving piece 2, and a gap is reserved between the inner wall of the jacket 5 and the outer wall of the driving piece 2 to form the accommodating space 4.

A passage for passing a medium is formed between the bottom wall of the volute 11 and the side wall of the impeller 3, and is a control gap 7; the high-pressure water channel 8 is arranged on the shell 14, and the high-pressure water channel 8 penetrates the shell 14 along the length direction of the output shaft of the driving piece 2, so that the accommodating space 4 is communicated with the control gap 7. When the impeller 3 sucks the medium from the water inlet 121 and discharges the medium to the water outlet 111, as the control gap 7 is positioned at the bottom wall of the volute 11, that is, the control gap 7 is positioned at the water outlet 111, part of the medium can enter the control gap 7 and enter the accommodating space 4 through the high-pressure water channel 8, and then the medium exchanges heat with the outer wall of the driving piece 2, so that the cooling of the driving piece 2 is realized.

One end of the return pipe 6 is detachably connected to the water inlet base 12, the other end of the return pipe is detachably connected to the shell body 14, and a connecting channel for communicating the return pipe 6 with the accommodating space 4 is formed in the shell body 14. Because the pressure at the water inlet 121 is lower than the pressure at the water outlet 111, after the medium enters the accommodating space 4 through the control gap 7 and the high-pressure water channel 8 and exchanges heat with the driving piece 2, the medium can flow to the water inlet 121 through the water return pipe 6 and is mixed with the medium at the water inlet 121, and the heat of the driving piece 2 is carried away from the accommodating space 4, so that the purpose of cooling the driving piece 2 is achieved.

In a preferred embodiment, the passage connecting the water outlet 111 with the accommodation space 4 is located at the top of the driving member 2, and the passage connecting the water inlet 121 with the accommodation space 4 is located at the bottom of the driving member 2.

Specifically, the spiral case 11 is located at the top of the casing 14, the water inlet base 12 is located at one side of the casing 14, one end of the water return pipe 6 is detachably connected to the bottom of the water inlet base 12, and the other end is detachably connected to the bottom of the casing 14. After the high-pressure medium conveyed to the water outlet 111 by the impeller 3 enters the accommodating space 4 through the control gap 7 and the high-pressure water channel 8, the medium in the accommodating space 4 moves downwards due to the fact that the pressure at the water inlet 121 is lower than the pressure at the water outlet 111 and the influence of gravity exists, namely, the medium flows through the outer wall of the driving piece 2 and then falls to the bottom of the accommodating space 4, and flows to the water inlet 121 through the water return pipe 6. The medium can more comprehensively contact with the outer wall of the driving piece 2, so that the longer-time heat exchange is realized, and the cooling effect of the driving piece 2 is improved.

Referring to fig. 3 and 4, in a preferred embodiment, the water outlet direction of the water return pipe 6 at the water inlet 121 is disposed at an acute angle to the water inlet direction at the water inlet 121, and the water inlet direction of the control gap 7 is disposed at an acute angle to the water outlet direction of the water outlet 111.

Specifically, the edge of the rear cover plate 31 of the impeller 3 is provided with a chamfer, and the bottom wall of the volute 11 is formed with a convex edge extending downwards, so that a control gap 7 formed in the area between the convex edge and the chamfer extends obliquely upwards away from the impeller 3. Because the direction of the medium flowing in the direction of the water outlet 111 is that the impeller 3 faces to the outside, and the direction of the medium flowing in the control gap 7 is also that of the impeller 3, compared with other arrangement modes, the scheme can reduce the obstruction of the medium flowing out of the water outlet 111 when the medium flows into the control gap 7, so that the medium can stably and more enter the control gap 7, and the reliability and the cooling effect of the device are improved.

The end of the return pipe 6 connected with the water outlet 111 is arranged towards the impeller 3. The medium flowing direction in the direction of the water inlet 121 is the direction of the outside towards the impeller 3, and the medium flowing direction at the end part of the water return pipe 6 is also the direction towards the impeller 3.

In a preferred embodiment, the inner wall of the housing 1 is provided with an annular flow channel 13 arranged around the impeller 3, and one end of the control gap 7 is located on the side wall of the annular flow channel 13.

Specifically, the annular flow channel 13 is formed on the inner wall of the casing 14 and is coaxially matched with the impeller 3, that is, after the impeller 3 sucks the medium, a vortex is formed in the annular flow channel 13. Compared with a volumetric pump with the same specification, the pump has larger lift, is insensitive to pressure fluctuation in the system compared with other common pump bodies, and is suitable for sewage transfer and transportation in places such as markets, hospitals and schools.

In a preferred embodiment, a retainer 131 for increasing the length of the control gap 7 is fixedly attached to the back plate 31.

Specifically, the retaining ring 131 is coaxial fixed connection on the back shroud 31, and the outer wall of retaining ring 131 and the outer wall coplanarity adaptation of back shroud 31, because control gap 7 is through the outer wall of impeller 3 and spiral case 11 diapire formation, so can increase control gap 7's length through retaining ring 131, compare in the shorter control gap 7 of length, above-mentioned scheme can effectively hinder through control gap 7 open-ended impurity because of receiving the high pressure that the medium carried, the impurity that has reduced carries in the high pressure medium gets into the possibility in the accommodation space 4, reduce the impurity precipitation in the accommodation space 4 and then influence the possibility of radiating effect promptly.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a sewage hoisting device, includes casing (1), driving piece (2), its characterized in that: also comprises a jacket (5);

the shell (1) comprises a water inlet (121) and a water outlet (111);

the jacket (5) is coated on the driving piece (2) and forms an accommodating space (4) with the outer wall of the driving piece (2);

the containing space (4) is respectively communicated with the water outlet (111) and the water inlet (121) through different passages;

the water outlet device further comprises an impeller (3), wherein a control gap (7) communicated with the accommodating space (4) is formed between the edge of the impeller (3) and the inner wall of the shell (1) at the water outlet (111);

the medium flowing direction at the control gap (7) is arranged at an acute angle with the medium flowing direction at the water outlet (111).

2. The sewage lifting device of claim 1, wherein: a passage for communicating the water outlet (111) with the accommodation space (4) is positioned at the top of the driving member (2), and a passage for communicating the water inlet (121) with the accommodation space (4) is positioned at the bottom of the driving member (2).

3. The sewage lifting device according to claim 1 or 2, characterized in that: a water return pipe (6) which is used for communicating the accommodating space (4) with the water inlet (121) is fixedly connected to the shell (1).

4. A sewage lifting device according to claim 3, wherein: the medium flowing direction of the water return pipe (6) at the water inlet (121) and the medium flowing direction at the water inlet (121) are arranged at an acute angle.

5. The sewage lifting device of claim 1, wherein: an annular flow passage (13) which is arranged around the impeller (3) is formed in the inner wall of the shell (1), and one end of the control gap (7) is positioned on the side wall of the annular flow passage (13).

6. The sewage lifting device of claim 1, wherein: the shell (1) is provided with a high-pressure water channel (8) which communicates the control gap (7) with the accommodating space (4).

7. The sewage lifting device of claim 1, wherein: the impeller (3) comprises a rear cover plate (31), and the control gap (7) is positioned between the rear cover plate (31) and the inner wall of the shell (1).

8. The wastewater lifting device of claim 7, wherein: and a check ring (131) for increasing the length of the control gap (7) is fixedly connected to the rear cover plate (31).