CN114396111A

CN114396111A - Sewage lifting device

Info

Publication number: CN114396111A
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: 2022-04-26
Anticipated expiration: 2041-12-28
Also published as: CN114396111B

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 accommodating space is respectively communicated with the water outlet and the water inlet through different passages. The present application has the effect of being able to operate for long periods of time in a dry environment.

Description

Sewage lifting device

Technical Field

The application relates to the field of fluid conveying equipment, in particular to a sewage lifting device.

Background

In large buildings with dense people flow, such as subway stations, superstores, hospitals, etc., the sewage generation rate is high, and the pump for transferring sewage is required to have the capability of continuous operation and higher reliability. The current common scheme is to transfer sewage by adopting a submersible sewage pump.

In view of 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 a motor of the submersible sewage pump can generate heat for a long time in long-time continuous operation, so that the submersible sewage pump has the risk of damage and even burning.

Disclosure of Invention

In order to carry out the effectual cooling of stabilizing for a long time to the pump of installing in dry-type environment, this application provides a sewage hoisting device.

The application provides a sewage hoisting 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 accommodating space is respectively communicated with the water outlet and the water inlet through different passages.

By adopting the technical scheme, in the use process, the driving piece drives the impeller in the shell to fix the shaft and rotate, and the medium is sucked 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 the medium at the water outlet enters the accommodating space between the jacket and the outer wall of the driving part through the passage and is discharged to the water inlet through another passage after contacting with the outer wall of the driving part. The medium absorbing the heat of the driving part is driven by the impeller together with the medium at the water inlet and is discharged from the water outlet. In the process, the impeller drives the medium to transfer, and meanwhile the medium is cooled for the driving part, namely, the driving part can be cooled on the premise of not needing an additional cooling system only by the operation of the impeller, the possibility of burning of the driving part in long-time operation can be reduced, and the reliability of the device is improved.

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

Through adopting above-mentioned technical scheme, can flow downwards under the action of gravity behind the medium entering accommodation space of delivery port department, the medium discharges to delivery port department after can flowing on the outer wall of driving piece promptly. Above-mentioned process makes the medium that flows in the accommodation space abundant with the contact of driving piece outer wall, can with the driving piece outer wall between realize the heat exchange of the time of a specified duration for the cooling effect of driving piece has obtained the improvement.

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

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

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

Through adopting above-mentioned technical scheme, the medium flow direction of water inlet direction is outside towards the impeller direction, and the medium flow direction of the tip at wet return here also is towards the impeller direction, and for other arrangement, above-mentioned scheme can reduce the hindrance that comes from the flowing medium of water inlet department when medium flows out the wet return in the wet return for medium in the wet return can smoothly get into water inlet department, has improved the device's reliability.

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 in rational configuration control clearance, can filter the large granule impurity that medium carried in will getting into accommodation space through the control clearance, further reduce the possibility that impurity deposits and then influence the radiating effect in the accommodation space.

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

Through adopting above-mentioned technical scheme, the medium flow direction of delivery port direction is the impeller towards the outside, and the medium flow direction at control clearance here also deviates from the impeller direction, and for other arrangement, above-mentioned scheme can reduce the hindrance of the medium that flows outward of delivery port that receives when the medium flows in to the control clearance for in the medium can be stable and more gets into the control clearance, improved the device reliability and cooling effect.

Optionally, an annular flow channel surrounding the impeller is formed in the inner wall of the casing, 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 vortex that turns to the same with the impeller in the annular flow channel under the drive of blade, compares in the displacement pump with the specification and possess bigger lift, and it is insensitive to the pressure fluctuation in the system than other pump bodies commonly used simultaneously, is applicable to the sewage transfer transportation in places such as market, hospital, school.

Optionally, the housing is provided with a high-pressure water channel for communicating the control gap with the accommodating space.

Through adopting above-mentioned technical scheme, can communicate control clearance and accommodation space through high pressure water channel for the high pressure medium of delivery port department can smoothly get into and hold empty inside, and then realizes the 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 casing.

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

Optionally, a check ring for increasing the length of the control gap is fixedly connected to the rear cover plate.

Through adopting above-mentioned technical scheme, setting up of retaining ring has increased the length in control clearance, compares in the control clearance that length is shorter, and above-mentioned scheme can effectively hinder through control clearance 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 possibility that impurity deposits and then influence the 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 to fix the shaft and rotate, and the medium is sucked 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 the medium at the water outlet enters the accommodating space between the jacket and the outer wall of the driving part through the passage and is discharged to the water inlet through another passage after contacting with the outer wall of the driving part. The medium absorbing the heat of the driving part is driven by the impeller together with the medium at the water inlet and is discharged from the water outlet. In the process, the driving part is cooled by the medium when the medium is transferred by the impeller, namely, the driving part can be cooled on the premise of not adding a cooling system only by the work of the impeller, so that the possibility of burning out of the driving part during long-time work can be reduced, and the reliability of the device is improved;

2. the medium can form the vertical vortex that turns to the same with the impeller in the annular flow channel under the drive of blade, has bigger lift than the displacement pump with the specification, and the pressure fluctuation in the system is insensitive than other pump bodies commonly used simultaneously, is applicable to the sewage transfer transportation in places such as market, hospital, school.

Drawings

FIG. 1 is a sectional view showing the positions of respective members in the first embodiment.

Fig. 2 is an enlarged view of a portion a of fig. 1 showing one of the structures for controlling the clearance.

Fig. 3 is a sectional view showing the positions of the respective members in the embodiment.

FIG. 4 is an enlarged view of the portion B of FIG. 3 showing another gap control structure

Description of reference numerals: 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 drive member; 3. an impeller; 31. a rear cover plate; 4. an accommodating space; 5. a jacket; 6. a water return pipe; 7. controlling the clearance; 8. a high-pressure water channel.

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. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art with the understanding of the inventive concept of the present invention are within the scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In order to facilitate understanding of the sewage lifting device provided by the embodiment of the application, an application scenario of the sewage lifting device is explained first. The utility model provides a sewage hoisting device who records in embodiment of this application is arranged in sewage transportation, aims at solving in the correlation technique stealthily dirty pump and installs in dry-type environment and long-time work after the radiating effect poor, lead to the problem that the motor burns out. The sewage lifting device can realize heat dissipation through sewage while transporting sewage, and reduces the possibility of burning down a pump body in a dry environment due to long-time work.

The embodiment of the application discloses a sewage lifting device, referring to fig. 1 and 2, fig. 1 is a sectional view showing positions of components in the first embodiment, and fig. 2 is an enlarged view of a part A showing a structure for controlling a 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 part 2 is fixedly connected with the shell 1 and is used for driving the impeller 3 to rotate in a fixed shaft mode.

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; the interior of the casing body 14 is hollow, the volute casing 11 is provided with a water outlet 111 communicated with the interior of the casing body 14, and the water inlet base 12 is provided with a water inlet 121 communicated with the interior of the casing body 14. The driving part 2 is fixedly connected (or bolted) to the shell 14, an output shaft of the driving part 2 is coaxially and fixedly connected with the impeller 3, and the impeller 3 is arranged inside the shell 14 and is driven by the driving part 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, an output shaft of the motor extends into the casing 14 and is coaxially and fixedly connected with the impeller 3, and the output shaft of the motor is rotatably sealed with the casing 14.

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

Exemplarily, a water return pipe 6 for communicating the accommodating space 4 with the water inlet 121 is fixedly connected to the housing 1, 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 housing 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 housing 1, the impeller 3 includes a back cover plate 31, and the control gap 7 is located between the back cover plate 31 and the inner wall of the housing 1.

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

A channel for medium to pass through exists between the bottom wall of the volute 11 and the side wall of the impeller 3, and the channel is the control gap 7; the high-pressure water passage 8 is opened in the housing 14, and the housing 14 is penetrated by the high-pressure water passage 8 along the length direction of the output shaft of the driving member 2, so that the accommodating space 4 communicates 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, since the control gap 7 is located at the bottom wall of the volute casing 11, that is, the control gap 7 is located at the water outlet 111, part of the medium enters the control gap 7 and enters the accommodating space 4 through the high-pressure water channel 8, and then exchanges heat with the outer wall of the driving member 2, so that the cooling of the driving member 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 member 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, the heat of the driving member 2 is carried away from the accommodating space 4, and the purpose of cooling the driving member 2 is achieved.

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

Specifically, spiral case 11 is located the top of shell 14, and the base of intaking 12 is located shell 14 one side, and the connection can be dismantled in the bottom of the base of intaking 12 to wet return 6 one end, and the connection can be dismantled in the bottom of shell 14 to the other end. After the high-pressure medium delivered 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, because the pressure at the water inlet 121 is lower than that at the water outlet 111 and there is an influence of gravity, the medium in the accommodating space 4 moves downward, i.e., the medium flows through the outer wall of the driving member 2 and then falls on the bottom of the accommodating space 4, and flows to the water inlet 121 through the water return pipe 6. The medium can be more comprehensive with the outer wall contact of driving piece 2, and then realizes the heat exchange of longer time, has improved the cooling effect of driving piece 2.

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 arranged at an acute angle with the water inlet direction at the water inlet 121, and the water inlet direction of the control gap 7 is arranged at an acute angle with the water outlet direction of the water outlet 111.

Specifically, the edge of the back 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 the control gap 7 formed in the region between the convex edge and the chamfer extends obliquely upwards away from the impeller 3. Because the medium flowing direction in the direction of the water outlet 111 is towards the outside of the impeller 3, and the medium flowing direction at the position of the control gap 7 is also away from the direction of the impeller 3, compared with other arrangement modes, the scheme can reduce the obstruction of the medium flowing towards the outside 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 to the water outlet 111 is disposed toward the impeller 3. The medium flow direction of water inlet 121 direction is outside towards impeller 3 direction, and the medium flow direction of the tip at this place of wet return 6 is also towards impeller 3 direction, for other arrangement methods, above-mentioned scheme can reduce the hindrance that comes from the medium that water inlet 121 department flows when medium flows out wet return 6 in wet return 6 for the medium in wet return 6 can smoothly get into water inlet 121 department, has improved the reliability of the device

In a preferred embodiment, the inner wall of the casing 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 said annular flow channel 13.

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

In a preferred embodiment, a stop ring 131 for increasing the length of the control gap 7 is fixedly attached to the rear cover plate 31.

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

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a sewage lifting device, includes casing (1), its characterized in that of driving piece (2): 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 part (2) and forms an accommodating space (4) with the outer wall of the driving part (2);

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

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

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

4. The sewage lifting device of 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 or 2, wherein: the water outlet device is characterized by further comprising 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).

6. The sewage lifting device of claim 5, wherein: the medium flowing direction at the control gap (7) and the medium flowing direction at the water outlet (111) are arranged at an acute angle.

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

8. The sewage lifting device of claim 5, wherein: and the shell (1) is provided with a high-pressure water channel (8) for communicating the control gap (7) with the accommodating space (4).

9. The sewage lifting device of claim 5, 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).

10. The sewage lifting device of claim 9, wherein: and a check ring (131) used for increasing the length of the control gap (7) is fixedly connected to the rear cover plate (31).