WO2018162044A1

WO2018162044A1 - Submersible pump

Info

Publication number: WO2018162044A1
Application number: PCT/EP2017/055343
Authority: WO
Inventors: Sebastian Rieth
Original assignee: Husqvarna AB
Current assignee: Husqvarna AB
Priority date: 2017-03-07
Filing date: 2017-03-07
Publication date: 2018-09-13
Anticipated expiration: 2019-09-07

Abstract

The present disclosure relates to the pump 100, 500. The pump 100, 500 includes a housing member 108, 508 having a first end portion 110, 510 and a second end portion 112, 512 distal to the first end portion 110, 510. The pump 100, 500 further includes an impeller 102, 502 disposed proximal to the second end portion 112, 512 of the housing member 108, 508. The pump 100, 500 further includes a base member 116, 516 connected to the second end portion 112, 512 of the housing member 108, 508. The base member 116, 516 includes an inlet section 114, 514. The inlet section 114, 514 is adapted to removably attach with at least one nozzle 112, 322, 422, 522.

Description

SUBMERSIBLE PUMP

TECHNICAL FIELD

The present invention relates to pumps, and more particularly relates to a submersible pump having an inlet section adapted to removably attach with at least one nozzle.

BACKGROUND

Clean water pumps are generally installed for pumping water from a lower level to a higher level for domestic purposes or industrial purposes, such as for draining out clean water or laden liquid from one place to another place. Submersible pumps are adapted to operate for pumping the clean water or laden water. However, with varying particle sizes in the dust water and varying applications, the pumps may often be unsuitable for pumping both the dust water and clean water. Further, as nozzles of the submersible pumps often do not reach out to lower levels of the liquid, air from the environment tends to enter the nozzle of the pumps causing suction problems. In addition, the existing pumps leave out some portion of liquid on the surface since suction orifice of the nozzles does not contact the surface of the liquid after certain preset heights.

EP1441 127A1 provides a submersible pump. The submersible pump is for use in a settlement chamber, to move water through a drainage pipe. The pump includes a base suction region, and a pressure line that feeds into the pipe. The suction region has a suction pipe which exhibits a valve at its end to act as a closure.

Therefore, in light of the foregoing, there is a need for an improved submersible pump.

SUMMARY

In view of the above, it is an objective of the present invention to solve or at least reduce the problems discussed above. The objective is at least partially achieved according to a pump. The pump includes a housing member having a first end portion and a second end portion distal to the first end portion. The pump further includes an impeller disposed proximal to the second end portion of the housing member. The pump further includes a base member connected to the second end portion of the housing member. The base member includes an inlet section. The inlet section is adapted to removably attach with at least one nozzle.

According to an aspect of the present invention the inlet section is adapted to removably attach with multiple nozzles having different size parameters and/or structures.

According to an aspect of the present invention at least one nozzle includes type of a non-return valve. This non-return valve prevents the reverse or back flow of the liquid sucked.

According to an aspect of the present invention height of suction orifice of the nozzle is adjusted above a surface by attaching the nozzle of different size parameters and/or structures.

According to an aspect of the present invention the nozzle is adapted to suck liquid from the surface up to a height ranging from about 1 mm to about 3 mm.

According to an aspect of the present invention an exchange mechanism, having a rotating disc and at least two nozzles, is movably accommodated in the base member.

According to an aspect of the present invention at least one of the nozzles of the exchange mechanism includes a non-return valve.

According to an aspect of the present invention the exchange mechanism includes a central hole defined on the rotating disc for accommodating a spring member for lifting the rotating disc during rotation thereof.

According to an aspect of the present invention the rotation of the rotating disc aligns at least one nozzle with the inlet section of the base member.

According to an aspect of the present invention the rotating disc is lowered down after alignment of one of the nozzles with the inlet section for configuring the nozzle for suction operation. According to an aspect of the present invention the exchange mechanism includes longitudinal legs extending from a side surface of the rotating disc for providing support and stability during the rotation and alignment of the nozzle with the inlet section.

According to an aspect of the present invention the pump is used for gardening application, household application and industrial application.

According to an aspect of the present invention, the pump having the rotating disc aligns either the at least one nozzle or the hole for providing multiple suction requirements, for example for pumping either clean liquid or dirty liquid the pumping is optimized.

According to another aspect of the present invention, as the pump is configurable for pumping any sort of the liquid, like clean liquid or dirty liquid, an operator need not use multiple pumps for pumping different kinds of liquid. The operator can operate the pump with ease and may reduce operator fatigue.

According to another aspect of the present invention, the pump is provided with one or more stabilizing rims and a plurality of ribs, which provides support and stabilize the nozzle as well as the exchange mechanism. Thus, the life of the nozzle and the exchange mechanism is increased.

According to another aspect of the present invention, the inlet section is provided with a protection grid does not allow the entry of solid particles into the inlet section when the nozzle is not attached with the inlet section.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described in more detail with reference to the enclosed drawings, wherein:

FIG. 1 shows a sectional view of a pump, according to an embodiment of the present invention;

FIG. 2 shows a sectional view of a nozzle for the pump shown in

FIG. 1 , according to an embodiment of the present invention; FIG. 3 shows a sectional view of a nozzle for the pump shown in FIG. 1 , according to another embodiment of the present invention;

FIG. 4 shows a sectional view of a nozzle for the pump shown in FIG. 1 , according to another embodiment of the present invention;

FIG. 5 shows a sectional view of a pump, according to another embodiment of the present invention;

FIG. 6 shows a bottom view of the pump shown in FIG. 5, showing rotating plate, according to an embodiment of the present invention; and

FIGS. 7-10 shows bottom perspective views of portions of the pump shown in FIG. 5, according to an embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS

The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which example embodiments of the invention incorporating one or more aspects of the present invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. For example, one or more aspects of the present invention can be utilized in other embodiments and even other types of structures and/or methods. In the drawings, like numbers refer to like elements.

FIG. 1 illustrates a sectional view of a pump 100, according to an embodiment of the present invention. The pump 100 may embody a positive displacement pump including, but not limited to, a submersible pump. The submersible pump may be a single stage pump or a multi stage pump that may be used for gardening application, household application, drainage pumping application, sewage pumping application, industrial pumping and slurry pumping applications. The terms "pump" and "submersible pump" are interchangeably used in this disclosure. It is to be understood that the terms "pump" and "submersible pump" are one and the same and is not meant to be limiting the scope of the present disclosure. The pump 100 uses an impeller 102 driven by a motor centrifugally. In an example, the submersible pump 100 may be configured to be a "bottom suction" pump. It is to be understood that the submersible pump may be configured to be a "side suction" pump or any other configuration that may be designed to configure a workable submersible pump. The example of the "bottom suction" pump as used herein is not meant to be limiting the scope of the present invention.

In the bottom suction pump, the impeller 102 is coupled to a drive shaft 104 of an electric motor 106 for rotation about an axis X- X' of the drive shaft 104. The pump 100 includes a housing member 108 for accommodating various components of the submersible pump 100. The housing member 108 includes a first end portion 110 and a second end portion 112. The second end portion 112 is distal to the first end portion 110. The terms "first end portion" and "second end portion" used in the present disclosure corresponds to terms a "top end portion" and a "bottom end portion" respectively. The housing member 108 includes a base member 116 forming part of the second end portion 112 of the housing member 108. The base member 116 includes an inlet section 114 for allowing liquid to be sucked from a surface 126. The surface 126 may include, but not limited to, a ground surface in a garden area, a floor in a house or industry, or an underground sump. The housing member 108 is adapted to accommodate the impeller 102 adjacent to the electric motor 106 and proximal to the second end portion 112 of the housing member 108. The electric motor 106 of the impeller 102 is disposed in the housing member 108 such that rotation of the impeller 102 causes liquid to be sucked into a volute chamber (not shown) along the axis X- X' from the inlet section 114 of the base member 116. The sucked liquid may be expelled tangentially and horizontally within the volute chamber in the pump 100. The expelled liquid is adapted to be directed by the volute chamber to an outlet 118 to which a pipe 120 may be attached, such that the liquid is pumped upwardly through the pipe 120. The inlet section 114 of the base member 116 is adapted to removably attach with at least one nozzle 122. In one embodiment, the inlet section 114 is adapted to removably attach with multiple nozzles having different size parameters and/or structures. Further, as the inlet section 114 is configured to be removably attached with multiple nozzles of different size parameters and/or structures, a height "H" between the surface 126 and a suction orifice 124 located at bottom of the nozzle 122 can be adjusted. In an example, the multiple nozzles as described in the present disclosure are adapted to suck the liquid up from the surface 126 having a liquid level "L." In an example, the liquid level "L" ranges from about 1 mm to about 3 mm from the surface 126. The dimensions, such as external diameter, of nozzle 122, may correspond to the dimensions such as internal diameter of the inlet section 114.

FIG. 2 illustrates a sectional view of the nozzle 122 for the pump 100 shown in FIG. 1 , according to one embodiment of the present invention. In the illustrated embodiment, the nozzle 122 includes a first portion 128 and a second portion 130 extending from the first portion 128. The first portion 128 of the nozzle 122 is adapted to be removably connected with the inlet section 114 of the base member 116. The connection between the first portion 128 of the nozzle 122 and the inlet section 114 (shown in FIG. 1 ) may be made using a fastening member (not shown) including, but not limited to, threading or snap locking member, which may facilitate the removable connection between the nozzle 122 and the base member 116. In an example, as illustrated in the FIG. 2, the first portion 128 is configured in a conical shape and disposed towards the inlet section 114. It is to be understood that the shape of the first portion 128 is exemplary only and is not meant to be limiting. The second portion 130 is adapted to protrude downwards and towards the surface 126. The second portion 130 of the nozzle 122 is in cylindrical shape having a constant diameter. In an exemplary embodiment, the second portion 130 of the nozzle 122 may be configured to have varying diameters for the nozzle 122 to adapt for providing multiple suction requirements of the pump 100. The multiple suction requirements may arise due to varying sizes of particles laden in the liquid to be pumped.

In the illustrated example of the FIG. 2, the second portion 130 of the nozzle 122 further includes a non-return valve 132 at the suction orifice 124 at a bottom end 134 of the second portion 130. The non-return valve 132 is adapted to prevent back or reverse flow of the liquid through the inlet section 114 and out of the nozzle 122. In an example, the first portion 128 and the second portion 130 of the nozzle 122 has a height "H1 " of about 30 mm and the nozzle 122 is adapted to suck and pump the liquid from the surface 126 up to a height "H2" ranging from about 3 mm. In an embodiment, the nozzle 122 and the inlet section 114 may have a cross section including, but not limited to, circular, and rectangular cross section.

FIG. 3 illustrates a sectional view of a nozzle 322 for the pump 100 shown in FIG. 1 , according to another embodiment of the present invention. In the illustrated embodiment, the nozzle 322 includes a first portion 328 and a second portion 330 extending downwards from the first portion 328. The first portion 328 is adapted to removably connect with the inlet section 114 of the base member 116. The connection between the first portion 328 of the nozzle 322 and the inlet section 114 (shown in FIG. 1) may be made using a fastening member (not shown) including, but not limited to, threading or snap locking member, which facilitates the removable connection between the nozzle 322 and the base member 116. In an example, as illustrated in the FIG. 3, the first portion 328 is configured in a conical shape converging towards the inlet section 114. It is to be understood that the shape of the first portion 328 is exemplary only and is not meant to be limiting. The first portion 328 may be made in any shape which serves the purpose of allowing the sucked liquid to pass through the nozzle 322 in a streamlined manner.

The second portion 330 is adapted to protrude downwards and towards the surface 126 and thus contacting the liquid for pumping. The second portion 330 of the nozzle 322 is in a cylindrical shape having a constant diameter. In an example, the first portion 328 and the second portion 330 of the nozzle 322 has a height "H3" of about 5 mm and the nozzle 322 is adapted to suck and pump the liquid from the surface 126 up to a height "H4" ranging from about 1 mm.

FIG. 4 illustrates a sectional view of a nozzle 422 for the pump 100 shown in FIG. 1 , according to another embodiment of the present invention. In the illustrated embodiment, the nozzle 422 includes a first portion 428, a second portion 430 and a third portion 436 between the first portion 428 and the second portion 430. The first portion 428 is adapted to removably connect with the inlet section 114 of the base member 116. The connection between the first portion 428 of the nozzle 422 and the inlet section 114 (shown in FIG. 1 ) may be made using a fastening member (not shown), including but not limited to, threading or snap lock member, which facilitates the removable connection between the nozzle 422 and the base member 116. In an example, as illustrated in the FIG. 4, the first portion 428 is configured in a conical shape converging towards the inlet section 114. It is to be understood that the shape of the first portion 428 is exemplary only and is not meant to be limiting. The shape of the first portion 428 may be made in any shape which serves the purpose of allowing the sucked liquid to pass through in a streamline manner. The second portion 430 is adapted to protrude downwards and towards the surface 126 and thus contacting the liquid for pumping. The second portion 430 of the nozzle 422 is in conical shape having a varying diameter.

Further, the second portion 430 of the nozzle 422 includes an auxiliary suction orifice 444 provided at a side surface 446. The auxiliary suction orifice 444 is adapted to allow suction of liquid having particles of varying sizes. In an exemplary embodiment, the auxiliary suction orifice 444 is at a height "H5" of about 29 mm from a suction orifice 424 at a bottom end 434 of the nozzle 422. In another exemplary embodiment, the suction orifice 424 at the bottom end 434 of the nozzle 422 includes multiple smaller orifices 448 for allowing passage of the liquid. Thus, the nozzle 422 is adapted to provide multiple suction requirements. The multiple suction requirement may include, pumping of clear liquid from the suction orifice 424 and liquid having particles of varying sizes through the auxiliary suction orifice 444 of the nozzle 422. In an example, the first portion 428 and the second portion 430 of the nozzle 422 has a height "H6" of about 35 mm and the nozzle 422 is adapted to suck and pump the liquid from the surface 126 up to a height "H7" of about 2 mm.

In an embodiment, the inlet section 114 is adapted to connect with multiple nozzles, such as the nozzles 122, 322, or 422 of varying size parameters, and the pump 100 can be used for sucking and pumping both clean liquid and laden liquid (also reffereed to as dirty liquid or liquid containing particles). In an embodiment, when the clean liquid is required to be pumped out from the surface 126, the nozzle 122 is required to be connected at the inlet section 114 as shown in FIGS. 1 and 2. As the nozzle 122 is provided with the non-return valve 132, the nozzle 122 allows flow of clean liquid through the inlet section 114 and into the pump 100. The non-return valve 132 provided in the nozzle 522 prevents the back flow or the reverse flow of the liquid.

In an embodiment, when liquid containing particles is to be pumped from the surface 126, any one of the nozzles 322, 422 (shown in FIGS. 3 and 4) may be connected with the inlet section 114. As the nozzles 322, 422 are provided with larger sized suction orifices, the liquid having the particles can be easily pumped out from the surface 126.

In an embodiment, as the nozzle 422 shown in FIG. 4 includes the multiple smaller orifices 448 and the auxiliary suction orifice 444, the nozzle 422 can be used for suction of both the clean liquid and the liquid having the particles.

Further, as each of the nozzles 122, 322, 422 are designed to have varying heights, the surface 126 having the liquid can be pumped out with lowest possible height/depth. Also, as each of the nozzles 122, 322, 422 are designed to have varying diameters at the suction orifices 124, 324, 424 facing the surface 126, the nozzles 122, 322, 422 can be adapted to suck both the clean liquid and the liquid containing the particles.

In an example, the nozzles 122, 322, 422 having the first portions 128, 328, 428 respectively are having same conical configuration and thus, the inlet section 114 can be retrofitted with any of the nozzles 122, 322, 422 without any change or modification in the inlet section 114 of the pump 100.

FIG. 5 illustrates a sectional view of a pump 500, according to another embodiment of the present invention. The pump 500 may embody a positive displacement pump including, but not limited to, a submersible pump. The submersible pump may be a single stage pump or a multi stage pump that may be used for drainage pumping, sewage pumping, general industrial pumping and slurry pumping. The terms "pump" and "submersible pump" used in this disclosure are interchangeably used. It is to be understood that the terms "pump" and "submersible pump" are one and the same and is not meant to be limiting the scope of the present disclosure. The submersible pump 500 uses an impeller 502 driven by a motor centrifugally. In an example, the submersible pump may be configured to a "bottom suction" pump. It is to be understood that the submersible pump 500 may be configured to be a "side suction" pump or any other configuration that may be designed to configure a workable submersible pump. The example of the "bottom suction" configured as used herein in the present invention is not meant to be limiting the scope of the present invention.

In the bottom suction pump, the impeller 502 is coupled to a drive shaft 504 of an electric motor 506 for rotation about an axis Xi- X-i' of the drive shaft 504. The pump 500 includes a housing member 508 for accommodating various components of the pump 500. The housing member 508 includes a first end portion 510 and a second end portion 512. The second end portion 512 is distal to the first end portion 510. The terms "first end portion" and "second end portion" used in the present disclosure corresponds to terms a "top end portion" and a "bottom end portion" respectively. The housing member 508 is adapted to accommodate the impeller 502 below the electric motor 506 and proximal to the second end portion 512 of the housing member 508. The electric motor 506 of the impeller 502 is disposed in the housing member 508 such that rotation of the impeller 502 causes liquid to be sucked into the impeller 502 axially from an inlet section 514 of a base member 516. The base member 516 is connected to the second end portion 512 of the housing member 508. The sucked liquid may be expelled tangentially and horizontally within a volute chamber (not shown) in the pump 500. The expelled liquid is adapted to be directed by the volute chamber to an outlet 518 to which a pipe 520 is attached, such that the liquid is pumped upwardly through the pipe 520. The base member 516 includes the inlet section 514. The inlet section 514 is adapted to removably attach with an exchange mechanism 536 (shown in FIG. 6) for suction and pumping out the liquid from the surface 126. The surface 126 may include, but not limited to, a ground surface in a garden area, a floor in a house or industries, and underground sump.

FIG. 6 illustrates a bottom view of the pump 500 shown in FIG. 5 according to an embodiment of the present invention. The illustrated figure shows the exchange mechanism 536, according to one embodiment of the present invention. The exchange mechanism 536 includes at least one rotating disc 538 and at least one nozzle 522. In an alternative embodiment, the rotating disc 538 may be configured to be sliding or folding disc. The exchange mechanism 536 is movably accommodated in the base member 516. In an example, the at least one nozzle 522 of the exchange mechanism 536 includes a non-return valve 532. In an example, the nozzle 522 having the non-return valve 532 may be used for suction of clean liquid.

In another embodiment, the exchange mechanism 536 includes at least one rotating disc 538 exhibiting at least two nozzles 522. The at least two nozzles 522 are configured to be in different size parameters and/or structures. For example, the nozzle 522 having the non-return valve 532 may be used for suction of the clean liquid and another nozzle 522 without the non-return valve 532 may be used for suction of dirty liquid.

The exchange mechanism 536 includes a central hole 540 defined on the rotating disc 538 for accommodating a spring member 542 (shown in FIG. 5) for lifting the rotating disc 538 for rotation. In one example, the central hole 540 is present at a central position on the rotating disc 538. In alternative examples, the central hole 540 may be present at any position offset from the central position on the rotating disc 538. The rotation of the rotating disc 538 aligns at least one nozzle 522 with the inlet section 514 of the base member 516. The rotating disc 538 may be moved or lowered down after alignment of one of the nozzles 522 with the inlet section 514 for configuring the nozzle 522 for suction operation. The exchange mechanism 536 further includes longitudinal legs 550 (shown in FIG. 7) extending from a side surface 544 (shown in FIG. 7) of the rotating disc 538 for providing support and stability during the rotation and alignment of the nozzle 522 with the inlet section 514. In an embodiment, the longitudinal legs 550 may engage with the base member 516 and act as a guide during rotation of the rotating disc 538. As the exchange mechanism 536 is configured with the multiple nozzles 522 and holes 546, the pump 500 may be configured to pump either clean liquid or dirty liquid from the surface 126. In an example, the pump 500 is used for gardening application and household applications.

FIGS. 7 illustrates a bottom perspective view of a portion of the pump 500 as shown in the FIGS. 5 and 6, according to an embodiment of the present invention. The rotating disc 538 of the exchange mechanism 536 in the illustrated figure is positioned in a working position, wherein the nozzle 522 of the rotating disc 538 is aligned with the inlet section 514 of the pump 500. In the illustrated example, the nozzle 522 provided in the rotating disc 538 includes the non-return valve 532. The nozzle 522 is detachably connected with the inlet section 514 for pumping clear liquid from the surface 126 as the nozzle 522 includes the non-return valve 532. FIG. 8 illustrates a bottom perspective view of a portion of the pump 500 as shown in the FIG. 7, according to an embodiment of the present invention. In the illustrated figure, the rotating disc 538 of the exchange mechanism 536 is lifted to a pre-set height from the base member 516. The rotating disc 538 is lifted using the spring member 542 disposed inside the central hole 540. The exchange mechanism 536 lifted is free for rotation about the central hole 540 and the axis "C-C" as the nozzle 522 is detached from the inlet section 514. The central hole 540 may include a stopper member (not shown) above the rotating disc 538 for restraining the longitudinal movement of the exchange mechanism 536 after moving to a pre-set height from the base member 516. The exchange mechanism 536 may be rotated using rotating mechanism including but not limited to, automatic mechanism including, motor mechanism, gear mechanism and manual rotation.

In an example, the automatic mechanism using the motor mechanism may include a stepper motor (not shown). The stepper motor may be disposed below the spring member 542 and coupled to bottom of the rotating disc 538. The stepper motor may be connected with a power source (not shown) and may be activated using a switch (not shown) disposed at the housing member 508 by a user/operator. In an example, the stepper motor may be configured to rotate the exchange mechanism 536 only when the exchange mechanism 536 is lifted by the spring member 542 and thus preventing unintentional rotation during operation of the pump 500. In another example, the automatic mechanism using the gear mechanism (not shown) may include one or more gears connected to a driving motor (not shown). The one or more gears may be coupled to the exchange mechanism 536 for rotation by operating a switch (not shown) disposed in the housing member 508.

As illustrated in the FIG. 8, the inlet section 514 includes a protection grid 552 for restraining entry of solid larger particles inside the inlet section 514. The protection grid 552 is adapted to selectively open when the nozzle 522 is removably attached surrounding the inlet section 514. In an example, when the nozzle 522 is lifted up from the inlet section 514, the protection grid 552 in the inlet section 514 closes the opening of the inlet section 514 for restraining the entry of the solid particles. In an embodiment, the protection grid 552 may include a spring or a flap (not shown) for closing the inlet section 514 when the nozzle 522 is lifted up from the inlet section 514.

Further, the base member 516 includes one or more stabilizing rims 554, 556, on the base member 516, facing the exchange mechanism 536. A first stabilizing rim 554 is provided at the inlet section 514. The first stabilizing rim 554 is adapted to provide support to the nozzle 522 when the nozzle 522 is attached at the inlet section 514. A second stabilizing rim 556 is provided on the base member 516, at a location different from the inlet section 514. A portion of the base member 516 covered by the second stabilizing rim 556 does not form the inlet section 514 of the pump 500. The first and second stabilizing rims 554, 556 may be configured in a shape which supports the nozzle 522 both in a working position and a non-working or a parking portion. The term "working position" is defined as a position of the nozzle 522 on the base member 516, when the nozzle 522 is detachably connected to the inlet section 514. The term "non- working or parking position" is defined as a position of the nozzle 522 on the base member 516, when the nozzle 522 is positioned away from the inlet section 514. In an embodiment, a shape of the stabilizing rims 554, 556 may be including, but not limited, to a shape conforming to the shape of the inlet section 514. The shape of the inlet section 514 may include, circular, oval, square, rectangular or any other non-geometric shapes.

Further, the base member 516 includes a plurality of ribs 558 disposed on a surface 560 of the base member 516. Each ribs of the plurality of ribs 558 are spaced apart from each such that the longitudinal legs 550 can be supported and stabilized, when the exchange mechanism 536 makes contact with the base member 516 during the working position of the nozzle 522 (as shown in FIG. 7) and also, when the exchange mechanism 536 is lowered down after rotation about the axis "C-C" (as shown in FIG. 10). Preferably the plurality of ribs 558 are disposed in a circular manner, conforming to periphery of the rotating disc 538 of the exchange mechanism 536.

FIG. 9 illustrates a bottom perspective view of a portion of the pump 500 as shown in the FIG. 7 according to an embodiment of the present invention. In the illustrated figure, the rotating disc 538 of the exchange mechanism 536 is rotated to a pre-set angle "A" about the central hole 540 and the axis "C-C". The rotation of the exchange mechanism 536 rotates the rotating disc 538 and aligns any one of the holes 546 of the rotating disc 538 with the inlet section 514.

FIG. 10 illustrates a bottom perspective view of a portion of the pump 500 as shown in the FIG. 7, according to an embodiment of the present invention. In the illustrated figure, after the rotation about the axis "C-C" of the central hole 540, the rotating disc 538 of the exchange mechanism 536 is lowered down. The exchange mechanism 536 lowered downed aligns the at least one of the hole 546 with the inlet section 514 of the base member 516. The alignment of the hole 546 with the inlet section 514 forms a passage 548 for the liquid by aligning with any one of the holes 546 of the rotating disc 538 with the inlet section 514. The alignment of the any one of the holes 546 with the inlet section 514 may allow the pumping of liquid having dust particles as well.

In an embodiment, the exchange mechanism 536 in the pump 500 allows the pumping of either the clean liquid or the liquid containing particles. In an example, when the clean liquid is required to be pumped from the surface 126, the nozzle 522 of the exchange mechanism 536 is required to be aligned with the inlet section 514, as shown in FIG. 7. As the nozzle 522 is provided with the non-return valve 532, the nozzle 522 allows flow of liquid through the inlet section 514 and into the pump 500. The non-return valve 532 provided in the nozzle 522 prevents the back flow or the reverse flow of the liquid.

In another example, when liquid containing particles is to be pumped out from the surface 126, any one of the holes 546 are required to be aligned with the inlet section 514 as shown in FIG. 10. As the holes 546 are provided with larger sized orifices, the liquid having the particles is pumped out from the surface 126.

In the drawings and specification, there have been disclosed preferred embodiments and examples of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for the purpose of limitation of the scope of the invention being set forth in the following claims.

LIST OF ELEMENTS

100 Pump

102 Impeller

104 Drive shaft

106 Electric motor

108 Housing member

1 10 First end portion

1 12 Second end portion

1 14 Inlet section

1 16 Base member

1 18 Outlet

120 Pipe

122 Nozzle

124 Suction orifice 26 Surface

128 First portion

130 Second portion

132 Non-return valve

134 Bottom end

322 Nozzle

324 Suction orifice

328 First portion

330 Second portion

422 Nozzle

424 Suction orifice

428 First portion 430 Second portion

434 Bottom end

436 Third portion

444 Auxiliary suction orifice

446 Side surface

448 Multiple smaller orifices

500 Pump

502 Impeller

504 Drive shaft

506 Electric motor

508 Housing member

510 First end portion

512 Second end portion

514 Inlet section

51 6 Base member

518 Outlet

520 Pipe

522 Nozzle

532 Non-return valve

536 Exchange mechanism

538 Rotating disc

540 Central hole

542 Spring member

544 Side surface

546 Hole

548 Passage 550 Longitudinal Legs

552 Protection grid

554 First stabilizing rim

556 Second stabilizing rim

558 Plurality of ribs

560 Surface

H Height

H1 Height

H2 Height

H3 Height

H4 Height

H5 Height

H6 Height

H7 Height

L Level

A Pre-set angle

X-X' Axis

C-C Axis

Claims

1 . A pump (100, 500) comprising:

a housing member (108, 508) having a first end portion (110, 510) and a second end portion (112, 512) distal to the first end portion (110, 510);

an impeller (102, 502) disposed proximal to the second end portion (112, 512) of the housing member (108, 508); and

a base member (116, 516) connected to the second end portion (112, 512) of the housing member (108, 508), the base member (116, 516) includes an inlet section (114, 514);

characterized in that,

the inlet section (114, 514) is adapted to removably attach with at least one nozzle (112, 322, 422, 522). 2. The pump (100) of claim 1 , wherein the inlet section (114) is adapted to removably attach with multiple nozzles (112, 322, 422) having different size parameters and/or structures.

3. The pump (100) of claim 1 or 2, wherein at least one nozzle (112) includes a non-return valve (132).

4. The pump (100) of any of the preceding claims, wherein height of a suction orifice of the nozzle (112) is adjusted above a surface (126) by attaching the nozzle (112) of different size parameters and/or structures.

5. The pump (100) of any of the preceding claims, wherein the nozzle (112) is adapted to suck liquid from the surface (126) up to a height ranging from about 1 mm to about 3 mm.

6. The pump (500) of claim 1 or 2 further includes an exchange mechanism (536) having a rotating disc (538) and at least two nozzles (522), wherein the exchange mechanism (536) is movably accommodated in the base member (516).

1

7. The pump (500) of claim 6, wherein at least one of the nozzles (522) of the exchange mechanism (536) includes a non-return valve (532). 8. The pump (500) of claim 6, wherein the exchange mechanism (536) includes a central hole (540) defined on the rotating disc (538) for accommodating a spring member (542) for lifting the rotating disc (538) during rotation thereof. 9. The pump (500) of claim 8, wherein the rotation of the rotating disc (538) aligns at least one nozzle (522) with an inlet section (514) of a base member (516).

10. The pump (500) of claim 8, wherein the rotating disc (538) is lowered down after alignment of one of the nozzles (522) with the inlet section

(514) for configuring the nozzle (522) for suction operation.

1 1 . The pump (500) of any of claims 6 to 10, wherein the exchange mechanism (536) includes longitudinal legs (550) extending from a side surface (544) of the rotating disc (538) for providing support and stability during the rotation and alignment of the nozzle (522) with the inlet section (514).

12. The pump (100, 500) of any of the preceding claims, wherein the pump (100, 500) is used for gardening application, household application and industrial application.

2