DESC:FIELD
The present disclosure generally relates to the field of pumps and more specifically relates to a sewage pump.
BACKGROUND
The background information herein below relates to the present disclosure but is not necessarily prior art.
Traditional fluid pump typically include three casings, a motor casing, an oil casing, and a water casing. The motor casing encloses a motor and a shaft. The water casing encloses an impeller. The water casing often leaks fluids into the motor casing, potentially damaging the motor. The oil casing featuring a mechanical sealing arrangement is placed between the motor casing and the water casing. The mechanical seal arrangement is designed to stop pumped fluids from leaking along the shaft and into the motor casing. The mechanical seal system includes multiple components including a gasket, a spring actuator, a ring, and an elastomer.
Further, the oil casing includes an oil chamber which serves as a lubrication system for the mechanical seal arrangement to ensure its optimal functioning. However, the inclusion of the oil casing and the mechanical seal arrangement in the pump, makes the overall assembly of the pump heavy and bulky, resulting in an increased weight of the pump. Moreover, during regular maintenance of the pump, all three casings must be completely disassembled. The process of disassembly and reassembling the casings and the mechanical sealing arrangement requires skilled labour, which raises labour costs and the overall product cost. Additionally, the mechanical seal system contributes to higher servicing and maintenance expenses. Furthermore, the components of the mechanical sealing system cannot be found easily in the local market, leading to delays in maintenance since these parts must be sourced directly from the manufacturer.
Therefore, there is a felt need for a sewage pump that alleviates the aforementioned drawbacks.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
It is an object of the present disclosure to ameliorate one or more problems of the prior art or to at least provide a useful alternative.
An object of the present disclosure is to provide a sewage pump.
Another object of the present disclosure is to provide a sewage pump that eliminates the need for a mechanical sealing arrangement.
Yet another object of the present disclosure is to provide a sewage pump that prevents leakage of the water from the water casing into a motor casing.
Still another object of the present disclosure is to provide a sewage pump that facilitates ease of assembly and disassembly.
Another object of the present disclosure is to provide a sewage pump that offers ease of service and maintenance and reduced the labour cost.
Yet another object of the present disclosure is to provide a sewage pump which can be easily available in the market.
Still another object of the present disclosure is to provide a sewage pump which is comparatively light in weight and has a compact size.
Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.
SUMMARY
The present disclosure envisages a sewage pump. The sewage pump comprises a first casing, a second casing and a sealing arrangement.
The first casing is configured with a passage at one end. The first casing is configured to enclose a motor and a motor-shaft protruding through the passage.
The second casing is mounted on the first casing. The second casing is enclosing an impeller connected to the motor-shaft.
The sealing arrangement is mounted in the passage of the first casing and configured to receive the motor-shaft. The sealing arrangement includes at least one ball bearing and at least one oil seal.
The first casing includes a hollow cylinder having an operative first end and an operative second end, a first bracket is mounted on said operative first end and a second bracket is mounted on said operative second end. The first bracket is mounted on the operative first end of the hollow cylinder and the second bracket is mounted on the operative second end of the hollow cylinder to define a space therebetween for housing the motor and the motor-shaft.
The first bracket is configured with an axial recess to mount a first ball bearing therein.
The second bracket is configured with the passage extending along the width of the second bracket. A second ball bearing is mounted in the passage.
A first end of the motor-shaft is mounted in the first ball bearing and a portion of the motor-shaft near a second end is mounted in the second ball bearing.
The first bracket and the second bracket are mounted on the operative ends of the hollow cylinder by means of a tie rod connection.
The sewage pump is selected from a group consisting of sewage wastewater drainage pumps, trash pumps, diaphragm pumps, submersible sewage shredder pumps, and centrifugal sewage pumps.
The first casing is made from a stainless-steel tubular body, and the second casing is made from a cast iron body.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
A sewage pump, of the present disclosure will now be described with the help of the accompanying drawing in which:
Figure 1 illustrates a sectional view of a conventional sewage pump;
Figure 2 illustrates a sectional view of a conventional sealing arrangement of the conventional sewage pump;
Figure 3 illustrates a sectional view of a sewage pump in accordance with an embodiment of the present disclosure; and
Figure 4 illustrates a sectional view of the sealing arrangement of the sewage pump in accordance with an embodiment of the present disclosure.
LIST OF REFERENCE NUMERALS
100’ Conventional or traditional sewage pump
101’ motor casing
101a’ motor
101b’ shaft
102’ oil casing
103’ water casing
104a’ first end of shaft
104b’ second end of shaft
105a’ first ball bearing
105b’ second ball bearing
106’ conventional mechanical sealing arrangement
107’ impeller
109’ pump inlet
110’ pump outlet
200 sewage pump of the present disclosure
201 first casing
201a motor
201b motor-shaft
202 second casing
203a first end of shaft
203b second end of shaft
204a first ball bearing
204b second ball bearing
205 hollow cylinder
206a first bracket
206b second bracket
207a first oil-seal
207b second oil seal
208 impeller
209 tie-rod connection
210 pump inlet
211 pump outlet
212 passage
213 sealing arrangement
214 handle
DETAILED DESCRIPTION
The present disclosure generally relates to the field of pumps and more specifically relates to a sewage pump. Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms "a,” "an," and "the" may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms "comprises," "comprising," “including,” and “having,” are open ended transitional phrases and therefore specify the presence of stated features, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, elements, components, and/or groups thereof.
When an element is referred to as being "mounted on," “engaged to,” "connected to," or "coupled to" another element, it may be directly on, engaged, connected or coupled to the other element.
The terms first, second, third, etc., should not be construed to limit the scope of the present disclosure as the aforementioned terms may be only used to distinguish one element, component, region, layer or section from another component, region, layer or section. Terms such as first, second, third etc.,when used herein do not imply a specific sequence or order unless clearly suggested by the present disclosure.
Terms such as “inner,” “outer,” "beneath," "below," "lower," "above," "upper," and the like, may be used in the present disclosure to describe relationships between different elements as depicted from the figures.
Conventional sewage pumps (100’) typically consist of three separate casings, a motor casing (101’), an oil casing (102’), and a water casing (103’). However, the inclusion of the oil casing (102’) and the mechanical sealing arrangement (106’) adds significant weight and bulk to the pump (100’), increasing the overall pump weight. Moreover, routine maintenance requires the complete disassembly of all three casings, a process that demands skilled labour and contributes to higher labour and product costs. The mechanical sealing arrangement (106’) also increases servicing and maintenance expenses. Furthermore, the components of the mechanical sealing arrangement (106’) are not readily available in local markets, leading to maintenance delays as these parts often need to be sourced directly from the manufacturer. Figure 1 illustrates the sectional view of the conventional sewage pump and figure 2 illustrates the sectional view of the conventional mechanical sealing arrangement.
To address the issues of conventional sewage pumps, the present disclosure envisages a sewage pump. The embodiments of the present disclosure will now be described with reference to the accompanying drawings.
The present disclosure envisages a sewage pump (200). The sewage pump comprises a first casing (201), a second casing (202) and a sealing arrangement (213). Figure 3 illustrates a sectional view of the sewage pump in accordance with an embodiment of the present disclosure.
The first casing (201) is configured with a passage (212) at one end. The first casing (201) encloses a motor (201a) and a motor-shaft (201b) protruding through the passage (212).
The second casing (202) is mounted on the first casing (201). The second casing (202) encloses an impeller (208) connected to the motor-shaft (201b).
The sealing arrangement (213) is mounted in the passage (212) of the first casing (201) and receives the motor-shaft (201b). The sealing arrangement (213) includes at least one ball bearing (204b) and at least one oil seal (207a, 207b).
The first casing (201) includes a hollow cylinder (205) having an operative first end and an operative second end, a first bracket (206a) mounted on the operative first end and a second bracket (206b) mounted on operative second end. The first bracket (206a) is mounted on the operative first end of the hollow cylinder (205) and the second bracket (206b) is mounted on the operative second end of the hollow cylinder (205) to define a space therebetween to house the motor (201a) and the motor-shaft (201b).
The first bracket (206a) is configured with an axial recess to mount a first ball bearing (204a) therein.
The second bracket (206b) is configured with the passage (212) extending along the width of the second bracket (206b). A second ball bearing (204b) is mounted in the passage (212).
The motor-shaft (201b) is defined by a first end (203a) and a second end (203b),
The first end (203a) of the motor-shaft (201b) is mounted in the first ball bearing (204a) and a portion of the motor-shaft (201b) is mounted in the second ball bearing (204b). The operative second end (203b) of the motor-shaft (201b) protrudes in the second casing (202). An impeller (208) is mounted on the second end (203b) of the motor-shaft (201b). The impeller (208) in operative condition creates turbulence within the second casing (202) to pressurize the fluid or semisolid material from one place to another.
The first bracket (206a) and the second bracket (206b) are mounted on the operative ends of the hollow cylinder (205) by means of a tie rod connection (209).
The sewage pump (200) is selected from a group consisting of sewage wastewater drainage pumps, trash pumps, diaphragm pumps, submersible sewage shredder pumps, and centrifugal sewage pumps.
The first casing (201) is made from a stainless-steel tubular body, and the second casing (202) is made from a cast iron body.
In an embodiment, a handle (214) is provided on the first casing (201).
Since the first casing (201) is directly mounted on the second casing (202) without any oil-filled casing in between, the gross weight of the pump (200) and inventory of the components is reduced significantly.
Further, due to the removal of the oil casing (102’), the sewage pump (200) facilitates ease of maintenance and reduces the dwell time required for disassembly and assembly. In addition, since the oil casing (102’) is removed, the sewage pump (200) is comparatively compact. Instead of the mechanical sealing arrangement (106’), the present disclosure discloses a sealing arrangement that includes a ball bearing and at least one oil seal to prevent the seepage of the fluid in the first casing (201). The specific arrangement of the ball bearing and the oil seals in the first casing offers similar functionality as the mechanical sealing arrangement while reducing complexity.
The floor space required for the mounting of the sewage pump (200) is reduced significantly. Compared to the conventional sewage pump (100’), the length of the sewage pump (200) is reduced in the range of 30 % to 35 %, width in the range of 1% to 2.5 % and height in the range of 25 % to 35 %.
Due to the elimination of the oil casing (102’), the weight of the sewage pump (200) is reduced in the range of 10% to 20%.
Since the mechanical seal arrangement (106’) of the conventional sewage pump (100') is replaced with the sealing arrangement (213), the amount of raw material required for the construction of the sewage pump is reduced in the range 15% to 25%.
Further, the elimination of the mechanical seal arrangement (106’) and the oil casing (102’) from the sewage pump (200) reduced the dwell time of assembly in the range of 20% to 25%, and the dwell time of disassembly in the range of 25% to 35%. The total dwell time required for the maintenance and repair is reduced in the range of 10% to 15%.
In an embodiment, the sewage pump (200) operates in a voltage range of 180V to 240V.
Further, the current requirement of the sewage pump (200) is reduced compared to the conventional sewage pumps (100’). The current requirement of the sewage pump (200) is reduced in the range of 1% to 5%.
Advantageously, since the sewage pump (200) is not configured with the oil-filled casing (102’), therefore, it eliminates the possibility of oil leakage during its operation and thus eliminates the requirement of the mechanical sealing arrangement. Due to the simpler construction of the sewage pump (200), the requirement of skilled manpower for the maintenance and the service is reduced.
The foregoing description of the embodiments has been provided for purposes of illustration and not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment, but, are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.
TECHNICAL ADVANCEMENTS
The present disclosure described hereinabove has several technical advantages including, but not limited to, a sewage pump, that;
• eliminates the need for a mechanical sealing arrangement;
• prevents leakage of the water from the water casing into a motor casing;
• facilitates ease of assembly and disassembly;
• facilitates ease of service and maintenance, and thus reduces the need for skilled labour and related labour costs;
• is easily available in the market; and
• is comparatively lighter and compact due to the absence of the mechanical sealing arrangement.
The foregoing disclosure has been described with reference to the accompanying embodiments which do not limit the scope and ambit of the disclosure. The description provided is purely by way of example and illustration.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
The foregoing description of the specific embodiments so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
Any discussion of devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation. ,CLAIMS:WE CLAIM:
1. A sewage pump (200) comprising:
- a first casing (201) configured with a passage (212) at one end, said first casing (201) configured to enclose a motor (201a) and a motor-shaft (201b) protruding through said passage (212);
- a second casing (202) mounted on said first casing (201), said second casing (202) enclosing an impeller (208) connected to said motor-shaft (201b); and
- a sealing arrangement (213) mounted in said passage (212) of said first casing (201) and configured to receive said motor-shaft (201b); said sealing arrangement (213) includes at least one ball bearing (204b) and at least one oil seal (207a, 207b).
2. The sewage pump (200) as claimed in claim 1, wherein said first casing (201) includes a hollow cylinder (205) having an operative first end and an operative second end, a first bracket (206a) mounted on said operative first end and a second bracket (206b) mounted said operative second end of said hollow cylinder (205) to define a space therebetween for housing said motor (201a) and said motor-shaft (201b).
3. The sewage pump (200) as claimed in claim 2, wherein said first bracket (206a) is configured with an axial recess to mount a first ball bearing (204a) therein.
4. The sewage pump (200) as claimed in claim 2, wherein said second bracket (206b) is configured with said passage (212) extending along the width of said second bracket (206b), wherein a second ball bearing (204b) is mounted in said passage (212).
5. The sewage pump (200) as claimed in claim 1, wherein a first end (203a) of said motor-shaft (201b) is mounted in said first ball bearing (204a) and a portion of said motor-shaft (201b) near a second end (203b) is mounted in said second ball bearing (204b).
6. The sewage pump (200) as claimed in claim 2, said first bracket (206a) and said second bracket (206b) is mounted on operative ends of said hollow cylinder (205) by means of a tie rod connection (209).
7. The sewage pump (200) as claimed in claim 1, wherein said sewage pump (200) is selected from a group consisting of sewage wastewater drainage pumps, trash pumps, diaphragm pumps, submersible sewage shredder pumps, and centrifugal sewage pumps.
8. The sewage pump (200) as claimed in claim 1, wherein said first casing (201) is made from a stainless-steel tubular body, and said second casing (202) is made from a cast iron body.

Dated this 03rd day of September, 2024

_______________________________
MOHAN RAJKUMAR DEWAN, IN/PA – 25
OF R. K. DEWAN & CO.
AUTHORIZED AGENT OF APPLICANT

TO,
THE CONTROLLER OF PATENTS
THE PATENT OFFICE, MUMBAI