A reciprocating pump to amplify discharge pressure gradient of a liquid and a method thereof

Abstract

A reciprocating pump (10) to amplify discharge pressure gradient of a liquid (20) is provided. The reciprocating pump includes a piston (30) to draw the liquid from a first reservoir (50) to a cylinder (40) through a first valve (60) by moving from a top dead center (70) of the cylinder to a bottom dead center (80) of the cylinder. The piston is to draw a charging liquid (90) from a second reservoir (100) through a second valve (110) upon closing the first valve to change a pressure of the liquid from a first pressure to a second pressure. The piston is to compress the liquid to change the pressure of the liquid from the second pressure to a third pressure. The reciprocating pump includes a third valve to discharge the liquid to an outlet upon changing the pressure of the liquid from the second pressure to the third pressure.

Description

[0001] A RECIPROCATING PUMP TO AMPLIFY DISCHARGE PRESSURE GRADIENT OF A LIQUID AND A METHOD THEREOF

[0002] EARLIEST PRIORITY DATE

[0003] This Application claims priority from a Complete patent application filed in India having Patent Application No. 202321043132, filed on June 27, 2023, and titled “A RECIPROCATING PUMP TO AMPLIFY DISCHARGE PRESSURE GRADIENT OF A LIQUID AND A METHOD THEREOF”

[0004] FIELD OF INVENTION

[0005] Embodiments of the present disclosure relate to a field of pumps and more particularly to a reciprocating pump to amplify discharge pressure gradient of a liquid and a method thereof.

[0006] BACKGROUND

[0007] A reciprocating pump transfers liquid by a reciprocating motion. The reciprocating pump includes a cylinder, a piston, a suction valve, and a discharge valve. Operation of the reciprocating pump begins with a suction stroke in which the piston moves away from a head of the cylinder, thereby creating a vacuum in the cylinder. The vacuum allows the liquid to enter the cylinder through the suction valve.

[0008] During a compression stroke, the piston moves towards the head of the cylinder, thereby compressing the liquid and increasing pressure of the liquid. As a result, the liquid which gets compressed is forced out through the discharge valve to a discharge line. Significant work needs to be done by the piston to compress the liquid in the reciprocating pump, thereby making the reciprocating pump energy intensive. A low discharge pressure gradient of the liquid is another point of concern.

[0009] Hence, there is a need for an improved reciprocating pump to amplify discharge pressure gradient of a liquid and a method thereof to address the aforementioned issue(s). OBJECTIVE OF THE INVENTION

[0010] An objective of the invention includes providing a reciprocating pump to amplify discharge pressure gradient of a liquid by compressing the liquid upon adding a charging liquid.

[0011] BRIEF DESCRIPTION

[0012] In accordance with an embodiment of the present disclosure, a reciprocating pump to amplify discharge pressure gradient of a liquid is provided. The reciprocating pump includes a piston positioned in a cylinder. The piston is adapted to draw the liquid from a first reservoir to the cylinder through a first valve by moving from a top dead center of the cylinder to a bottom dead center of the cylinder. The liquid is placed at a first pressure inside the first reservoir and the cylinder. The piston is also adapted to draw a charging liquid from a second reservoir through a second valve upon closing the first valve to change a pressure of the liquid from the first pressure to a second pressure. The charging liquid is stored in the second reservoir at the second pressure. The second valve and the first valve are adapted to open and close respectively before the piston reaches the bottom dead center of the cylinder. The second valve and the first valve are adapted to open and close simultaneously. The piston is further adapted to compress the liquid to change the pressure of the liquid from the second pressure to a third pressure by moving from the bottom dead center of the cylinder to the top dead center of the cylinder. The reciprocating pump also includes a third valve positioned at the top dead center of the cylinder. The third valve is adapted to discharge the liquid to an outlet upon changing the pressure of the liquid from the second pressure to the third pressure, thereby amplifying the discharge pressure gradient of the liquid.

[0013] In accordance with another embodiment of the present disclosure, a method to amplify discharge pressure gradient of a liquid and a method thereof is provided. The method includes drawing, by a piston positioned in a cylinder, the liquid from a first reservoir to the cylinder through a first valve by moving from a top dead center of the cylinder to a bottom dead center of the cylinder. The liquid is placed at a first pressure inside the first reservoir and the cylinder. The method also includes drawing, by the piston, a charging liquid from a second a reservoir through a second valve upon closing the first valve to change a pressure of the liquid from the first pressure to a second pressure. The charging liquid is stored in the second reservoir at the second pressure. The second valve and the first valve are adapted to open and close respectively before the piston reaches the bottom dead center of the cylinder. The second valve and the first valve are adapted to open and close simultaneously. The method further includes compressing, by the piston, the liquid to change the pressure of the liquid from the second pressure to a third pressure by moving from the bottom dead center of the cylinder to the top dead center of the cylinder. The method also includes discharging, by a third valve, the liquid to an outlet upon changing the pressure of the liquid from the second pressure to the third pressure, thereby amplifying the discharge pressure gradient of the liquid.

[0014] To further clarify the advantages and features of the present disclosure, a more explicit description of the disclosure will follow by reference to specific embodiments thereof, which are illustrated in the appended figures. It is to be appreciated that these figures depict typical embodiments of the disclosure and are therefore not to be considered limiting in scope. The disclosure will be described and explained with additional details with the appended figures.

[0015] BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The disclosure will be described and explained with additional specificity and detail with the accompanying figures in which:

[0017] FIG. 1 is a schematic representation of a reciprocating pump to amplify discharge pressure gradient of a liquid in accordance with an embodiment of the present disclosure;

[0018] FIG. 2 is a graphical representation of one embodiment of the reciprocating pump of FIG. 1, depicting variation of a pressure of the liquid with respect to time in accordance with an embodiment of the present disclosure; and

[0019] FIG. 3 is a flow chart representing the steps involved in a method to amplify discharge pressure gradient of a liquid in accordance with an embodiment of the present disclosure. Further, those skilled in the art will appreciate that elements in the figures are illustrated for simplicity and may not have necessarily been drawn to scale. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the figures by conventional symbols, and the figures may show only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the figures with details that will be readily apparent to those skilled in the art having the benefit of the description herein.

[0020] DETAILED DESCRIPTION

[0021] To promote an understanding of the principles of the disclosure, reference will now be made to the embodiment illustrated in the figures and specific language will be used to describe them. It will nevertheless be understood that no limitation of the scope of the disclosure is thereby intended. Such alterations and further modifications in the illustrated system, and such further applications of the principles of the disclosure as would normally occur to those skilled in the art are to be construed as being within the scope of the present disclosure.

[0022] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such a process or method. Similarly, one or more devices or sub-systems or elements or structures or components preceded by "comprises... a" does not, without more constraints, preclude the existence of other devices, sub-systems, elements, structures, components, additional devices, additional sub-systems, additional elements, additional structures, or additional components. Appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but not necessarily do, all refer to the same embodiment.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. The system, methods, and examples provided herein are only illustrative and not intended to be limiting. In the following specification and the claims, reference will be made to a number of terms, which shall be defined to have the following meanings. The singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise.

[0024] In the discussion that follows, references will be made to “first reservoir”, and “second reservoir” with reference to an entity (tank) that is used to store the liquid and the charging liquid respectively. In the discussion that follows, references will be made to “first valve”, “second valve”, and “third valve” with reference to an entity (valve) that is used to control an inflow and outflow of the liquid and the charging liquid with respect to the cylinder. In the discussion that follows, references will be made to “first pressure”, “second pressure” and “third pressure” with reference to a pressure of the liquid and the charging liquid during storage of the same in respective reservoirs and the cylinder.

[0025] Embodiments of the present disclosure relate to a reciprocating pump to amplify discharge pressure gradient of a liquid and a method thereof. The reciprocating pump includes a piston positioned in a cylinder. The piston is adapted to draw the liquid from a first reservoir to the cylinder through a first valve by moving from a top dead center of the cylinder to a bottom dead center of the cylinder. The liquid is placed at a first pressure inside the first reservoir and the cylinder. The piston is also adapted to draw a charging liquid from a second reservoir through a second valve upon closing the first valve to change a pressure of the liquid from the first pressure to a second pressure. The charging liquid is stored in the second reservoir at the second pressure. The second valve and the first valve are adapted to open and close respectively before the piston reaches the bottom dead center of the cylinder. The second valve and the first valve are adapted to open and close simultaneously. The piston is further adapted to compress the liquid to change the pressure of the liquid from the second pressure to a third pressure by moving from the bottom dead center of the cylinder to the top dead center of the cylinder. The reciprocating pump also includes a third valve positioned at the top dead center of the cylinder. The third valve is adapted to discharge the liquid to an outlet upon changing the pressure of the liquid from the second pressure to the third pressure, thereby amplifying the discharge pressure gradient of the liquid.

[0026] FIG. 1 is a schematic representation of a reciprocating pump (10) to amplify discharge pressure gradient of a liquid (20) in accordance with an embodiment of the present disclosure. The reciprocating pump (10) includes a piston (30) positioned in a cylinder (40). The piston (30) is adapted to draw the liquid (20) from a first reservoir (50) to the cylinder (40) through a first valve (60) by moving from a top dead center (70) of the cylinder (40) to a bottom dead center (80) of the cylinder (40). In one embodiment, quantity of the liquid (20) drawn from the first reservoir (50) may depend upon a stroke length of the piston (30). In one embodiment, the liquid (20) may include water. The liquid (20) is placed at a first pressure inside the first reservoir (50) and the cylinder (40).

[0027] Further, the piston (30) is adapted to draw a charging liquid (90) from a second reservoir (100) through a second valve (110) upon closing the first valve (60) to change a pressure of the liquid (20) in the cylinder (40) from the first pressure to a second pressure. In one embodiment, the charging liquid (90) may include water. In an exemplary embodiment, the liquid (20) and the charging liquid (90) may include mercury and water respectively. In some embodiments, the liquid (20) and the charging liquid (90) may be intermixable. In a specific embodiment, liquid (20) and the charging liquid (90) may not be inter mixable. In such an embodiment, an accumulator may be used to separate the liquid (20) and the charging liquid (90). In some embodiments, the charging liquid (90) may be compressed by gravity. In one embodiment, the liquid (20) and the charging liquid may include an incompressible liquid. The charging liquid (90) is stored in the second reservoir (100) at the second pressure. The second valve (110) and the first valve (60) are adapted to open and close respectively before the piston (30) reaches the bottom dead center (80) of the cylinder (40). The second valve (110) and the first valve (60) are adapted to open and close simultaneously. In one embodiment, an opening and closing of the second valve (110) and the first valve (60) may be overlapped.

[0028] Furthermore, the piston (30) is adapted to compress the liquid (20) present in the cylinder (40) to change the pressure of the liquid (20) from the second pressure to a third pressure by moving from the bottom dead center (80) of the cylinder (40) to the top dead center (70) of the cylinder (40). The reciprocating pump (10) also includes a third valve (120) positioned at the top dead center (70) of the cylinder (40). In one embodiment, the first valve (60), the second valve (110) and the third valve (120) may be located away from the cylinder (40). In some embodiments, the first valve (60), the second valve (110) and the third valve (120) may be positioned on the cylinder (40). Moreover, the third valve (120) is adapted to discharge the liquid (20) to an outlet (130) upon changing the pressure of the liquid (20) from the second pressure to the third pressure, thereby amplifying the discharge pressure gradient of the liquid (20). In one embodiment, the first valve (60), the second valve (110) and the third valve (120) may include a unidirectional valve.

[0029] Moreover, in some embodiments, the first valve (60), the second valve (110) and the third valve (120) may include a swing check valve, ball check valve, lift check valve, diaphragm check valve, piston (30) check valve, duckbill check valve, tilting disc check valve, gate valve, ball valve, butterfly valve, globe valve, dual plate check valve and a combination thereof. In one embodiment, the first valve (60), the second valve (110) and the third valve (120) may be connected in various configurations including series, parallel and a combination thereof. In a specific embodiment, the liquid (20), and the charging liquid (90) may include similar chemical and physical properties. In some embodiments, the liquid (20), and the charging liquid (90) may include dissimilar chemical and physical properties. In one embodiment, the first pressure may be adapted to remain below the second pressure. In such an embodiment, the second pressure may be adapted to remain below the third pressure.

[0030] Additionally, in an exemplary embodiment, the first valve (60), the second valve (110) and the third valve (120) may adapt to be actuated by at least one of an electric actuator, a pneumatic actuator, an electronic actuator, a hydraulic actuator and a combinator thereof. In one embodiment, the first valve (60) and the second valve (110) may be adapted to remain closed when the piston (30) is moving from the bottom dead center (80) of the cylinder (40) to the top dead center (70) of the cylinder (40).

[0031] In one embodiment, multiple units of the cylinder (40) may be arranged in a combination of series and parallel configurations to obtain a required pressure at a required flow of the liquid. In some embodiments, speed of the piston (30) may be varied. In a specific embodiment, the first pressure may be varied. In some embodiments, the second pressure may be varied. In one embodiment, crank angle of the piston (30) at which the first valve (60) closed may be varied. In one embodiment, the crank angle of the piston (30) at which the second valve (110) opened may be variable. In one embodiment, the crank angle of the piston (30) at which the second valve (110) closed may be variable. In some embodiments, the third valve (120) may be any suitable valve that may be activated by a preset value of pressure. In a specific embodiment, back pressure of the liquid at the outlet (130) may be manipulated by an external system as a result of system resistance. In one embodiment, the first valve (60) and the second valve (110) may be integral to a head of the cylinder (40). In some embodiments, non-returning valve may be used in pipes connecting the first valve (60) and the second valve (110) to cylinder (40) to prevent back flow of high pressure liquid. In a specific embodiment, the first valve (60) and the second valve (110) may be located along the cylinder (40) along a longitudinal axis of the cylinder (40).

[0032] Further, in one embodiment, multiple number of the first valve (60) may be used to speed up suction of the liquid. In a specific embodiment, multiple number of the second valve (110) may be used to increase the pressure of the liquid in multiple steps. In some embodiments, the pressure of the liquid may be increased in multiple steps through a single unit of the second valve (110) with connections from a number of pressurized reservoirs maintained at different pressures. In one embodiment, the pressure of the liquid may be increased in multiple steps through multiple units of the second valve (110) with connections from the number of pressurized reservoirs maintained at different pressures. In one embodiment, the liquid may have substantially different physical properties. In a specific embodiment, the second valve (110) may be a part of the piston (30). In one embodiment, the second valve (110) may be connected to the second reservoir (100) through a flexible hose. In one embodiment, the piston (30) may be single acting. In some embodiments, the piston (30) may be multi acting. The first reservoir (50) and the second reservoir (100) may be representing a source of pressurized liquid with pressure at pre-set values. In one embodiment, a number of the non-returning valve positioned on various ports of the cylinder (40) may be optimized to minimize back flow of the liquid. In some embodiments, pressurized tank or source of pressurized liquid may be recharged using the liquid from the discharge line on a continuous or an intermittent basis. In one embodiment, a driving mechanism of the piston (30) may be a quick return mechanism. Each of the above embodiments may be implemented individually or in combination with multiple of other claims or variations. FIG. 2 is a graphical representation of one embodiment of the reciprocating pump (10) of FIG. 1, depicting variation of the pressure (140) of the liquid (20) with respect to time in accordance with an embodiment of the present disclosure. In the graphical representation, the X axis (150) and the Y axis (160) represents the time and the pressure (140) of the liquid (20) respectively. It may be observed that, when the piston (30) is moving from the top dead center (70) of the cylinder (40) to the bottom dead center (80) of the cylinder (40), the pressure (140) of the liquid (20) attains a peak before the piston (30) reaches the bottom dead center (80) of the cylinder (40). The pressure (140) of the liquid (20) remains constant when the piston (30) moves from the bottom dead center (80) of the cylinder (40) to the top dead center (70) of the cylinder (40).

[0033] FIG. 3 is a flow chart representing the steps involved in a method (300) to amplify discharge pressure gradient of a liquid in accordance with an embodiment of the present disclosure. The method (300) includes drawing the liquid from a first reservoir to the cylinder through a first valve by moving from a top dead center of the cylinder to a bottom dead center of the cylinder in step 310. In one embodiment, drawing the liquid from a first reservoir to the cylinder through a first valve by moving from a top dead center of the cylinder to a bottom dead center of the cylinder includes drawing the liquid from a first reservoir to the cylinder through a first valve by moving from a top dead center of the cylinder to a bottom dead center of the cylinder by a piston positioned in the cylinder. The liquid is placed at a first pressure inside the first reservoir and the cylinder. In one embodiment, the liquid may include water. In one embodiment, quantity of the liquid drawn from the first reservoir may depend upon a stroke length of the piston.

[0034] The method (300) also includes drawing a charging liquid from a second a reservoir through a second valve upon closing the first valve to change a pressure of the liquid from the first pressure to a second pressure in step 320. In one embodiment, drawing a charging liquid from a second a reservoir through a second valve upon closing the first valve to change a pressure of the liquid from the first pressure to a second pressure includes drawing a charging liquid from a second a reservoir through a second valve upon closing the first valve to change a pressure of the liquid from the first pressure to a second pressure by the piston. The second valve and the first valve are adapted to open and close respectively before the piston reaches the bottom dead center of the cylinder. The second valve and the first valve are adapted to open and close simultaneously. In one embodiment, the charging liquid may include water. In some embodiments, the charging liquid may be compressed by gravity.

[0035] The method (300) also includes compressing the liquid to change the pressure of the liquid from the second pressure to a third pressure by moving from the bottom dead center of the cylinder to the top dead center of the cylinder in step 330. In one embodiment, compressing the liquid to change the pressure of the liquid from the second pressure to a third pressure by moving from the bottom dead center of the cylinder to the top dead center of the cylinder includes compressing the liquid to change the pressure of the liquid from the second pressure to a third pressure by moving from the bottom dead center of the cylinder to the top dead center of the cylinder by the piston. In one embodiment, the liquid and the charging liquid may include an incompressible liquid.

[0036] The method (300) further includes discharging the liquid to an outlet upon changing the pressure of the liquid from the second pressure to the third pressure, thereby amplifying the discharge pressure gradient of the liquid in step 340. In one embodiment, discharging the liquid to an outlet upon changing the pressure of the liquid from the second pressure to the third pressure, thereby amplifying the discharge pressure gradient of the liquid includes discharging the liquid to an outlet upon changing the pressure of the liquid from the second pressure to the third pressure, thereby amplifying the discharge pressure gradient of the liquid by a third valve. In a specific embodiment, the liquid and the charging liquid may include similar chemical and physical properties. In some embodiments, the liquid and the charging liquid may include dissimilar chemical and physical properties. In one embodiment, the first pressure may be adapted to remain below the second pressure. In such an embodiment, the second pressure may be adapted to remain below the third pressure. In one embodiment, the opening and closing of the second valve and the first valve may overlap. In a specific mechanism, the piston may be associated with driving mechanism including a quick return mechanism. In one embodiment, back pressure at the outlet may be manipulated by an external system as a result of system resistance. In some embodiments, the charging liquid may be topped up from the discharge line. Further, in one embodiment, the first valve, the second valve and the third valve may be located away from the cylinder. In some embodiments, the first valve, the second valve and the third valve may be positioned on the cylinder. In one embodiment, the first valve, the second valve and the third valve may include a unidirectional valve. In some embodiments, the first valve, the second valve and the third valve may include a swing check valve, ball check valve, lift check valve, diaphragm check valve, piston check valve, duckbill check valve, tilting disc check valve, gate valve, ball valve, butterfly valve, globe valve, dual plate check valve and a combination thereof. In an exemplary embodiment, the first valve, the second valve and the third valve may adapt to be actuated by at least one of an electric actuator, a pneumatic actuator, an electronic actuator, a hydraulic actuator and a combination thereof. In one embodiment, the first valve and the second valve may be adapted to remain closed when the piston is moving from the bottom dead center of the cylinder to the top dead center of the cylinder. In one embodiment, the second valve may be integrated to the piston and connected to the second reservoir through a pipe. In some embodiments, the liquid and the charging liquid may be intermixable. In a specific embodiment, liquid and the charging liquid may not be inter mixable. In such an embodiment, an accumulator may be used to separate the liquid and the charging liquid. In one embodiment, the second valve may be integrated to the piston and connected to the second reservoir through a pipe.

[0037] In one embodiment, multiple units of the cylinder may be arranged in a combination of series and parallel configurations to obtain a required pressure at a required flow of the liquid. In some embodiments, speed of the piston may be varied. In a specific embodiment, the first pressure may be varied. In some embodiments, the second pressure may be varied. In one embodiment, crank angle of the piston at which the first valve closed may be varied. In one embodiment, the crank angle of the piston at which the second valve opened may be variable. In one embodiment, the crank angle of the piston at which the second valve closed may be variable. In some embodiments, the third valve may be any suitable valve that may be activated by a preset value of pressure. In a specific embodiment, back pressure of the liquid at the outlet may be manipulated by an external system as a result of system resistance. In one embodiment, the first valve and the second valve may be integral to a head of the cylinder. In some embodiments, non-returning valve may be used in pipes connecting the first valve and the second valve to cylinder to prevent back flow of high pressure liquid. In a specific embodiment, the first valve and the second valve may be located along the cylinder along a longitudinal axis of the cylinder.

[0038] Further, in one embodiment, multiple number of the first valve may be used to speed up suction of the liquid. In a specific embodiment, multiple number of the second valve may be used to increase the pressure of the liquid in multiple steps. In some embodiments, the pressure of the liquid may be increased in multiple steps through a single unit of the second valve with connections from a number of pressurized reservoirs maintained at different pressures. In one embodiment, the pressure of the liquid may be increased in multiple steps through multiple units of the second valve with connections from the number of pressurized reservoirs maintained at different pressures. In one embodiment, the liquid may have substantially different physical properties. In a specific embodiment, the second valve may be a part of the piston. In one embodiment, the second valve may be connected to the second reservoir through a flexible hose. In one embodiment, the piston may be single acting. In some embodiments, the piston may be multi acting. The first reservoir and the second reservoir may represent a source of pressurized liquid with pressure at pre-set values. In one embodiment, a number of the non-returning valve positioned on various ports of the cylinder may be optimized to minimize back flow of the liquid. In some embodiments, pressurized tank or source of pressurized liquid may be recharged using the liquid from the discharge line on a continuous or an intermittent basis. In one embodiment, a driving mechanism of the piston may be a quick return mechanism. Each of the above embodiments may be implemented individually or in combination with multiple of other claims or variations.

[0039] Various embodiments of the reciprocating pump to amplify discharge pressure gradient of a liquid and a method thereof described above enable various advantages. The reciprocating pump is capable of amplifying the discharge pressure gradient of the liquid by compressing the liquid present in the cylinder upon drawing the charging liquid stored in the second reservoir, thereby achieving superior throughput. Further, the reciprocating pump is capable of amplifying the liquid by drawing less energy compared to existing counterparts, thereby achieving energy efficiency.

[0040] Further, actuation of the first valve, the second valve and the third valve by actuators enable superior control of the first valve, the second valve and the third valve, thereby ensuring optimum performance of the reciprocating pump. The reciprocating pump is capable of functioning with the liquid and the charging liquid having similar and dissimilar chemical and physical properties, thereby achieving operational flexibility. Further, the unidirectional nature of the first valve, the second valve and the third valve ensure the flow of the liquid and the charging liquid through predetermined paths, thereby achieving flawless operation of the reciprocating pump.

[0041] It will be understood by those skilled in the art that the foregoing general description and the following detailed description are exemplary and explanatory of the disclosure and are not intended to be restrictive thereof. While specific language has been used to describe the disclosure, any limitations arising on account of the same are not intended.

[0042] The figures and the forgoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, the order of processes described herein may be changed and is not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all the acts need to be necessarily performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples.

Claims

AIM:

1. A reciprocating pump (10) to amplify discharge pressure gradient of a liquid (20) comprising: a piston (30) positioned in a cylinder (40), wherein the piston (30) is adapted to: draw the liquid (20) from a first reservoir (50) to the cylinder (40) through a first valve (60) by moving from a top dead center (70) of the cylinder (40) to a bottom dead center (80) of the cylinder (40), wherein the liquid (20) is placed at a first pressure inside the first reservoir and the cylinder (40); characterized in that: draw a charging liquid (90) from a second reservoir (100) through a second valve (110) upon closing the first valve (60) to change a pressure of the liquid (20) from the first pressure to a second pressure, wherein the charging liquid (90) is stored in the second reservoir (100) at the second pressure, wherein the second valve (110) and the first valve (60) are adapted to open and close respectively before the piston (30) reaches the bottom dead center (80) of the cylinder (40), wherein the second valve (110) and the first valve (60) are adapted to open and close simultaneously; compress the liquid (20) to change the pressure of the liquid (20) from the second pressure to a third pressure by moving from the bottom dead center (80) of the cylinder (40) to the top dead center (70) of the cylinder (40); and a third valve (120) positioned at the top dead center (70) of the cylinder (40), wherein the third valve (120) is adapted to discharge the liquid (20) to an outlet (130) upon changing the pressure of the liquid (20) from the second pressure to the third pressure, thereby amplifying the discharge pressure gradient of the liquid (20).

2. The reciprocating pump (10) as claimed in claim 1, wherein the first valve (60), the second valve (110) and the third valve (120) comprises a unidirectional valve.

3. The reciprocating pump (10) as claimed in claim 1, wherein the first valve (60), the second valve (110) and the third valve (120) comprises at least one of a swing check valve, ball check valve, lift check valve, diaphragm check valve, piston (30) check valve, duckbill check valve, tilting disc check valve, gate valve, ball valve, butterfly valve, globe valve and dual plate check valve.

4. The reciprocating pump (10) as claimed in claim 1, wherein the first valve (60), the second valve (110) and the third valve (120) are adapted to be actuated by at least one of an electric actuator, a pneumatic actuator, an electronic actuator, and a hydraulic actuator.

5. The reciprocating pump (10) as claimed in claim 1, wherein the first valve (60) and the second valve (110) are adapted to remain closed when the piston (30) is moving from the bottom dead center (80) of the cylinder (40) to the top dead center (70) of the cylinder (40).

6. The reciprocating pump (10) as claimed in claim 1, wherein the liquid (20) and the charging liquid (90) are incompressible.

7. The reciprocating pump (10) as claimed in claim 1, wherein the first pressure is adapted to remain below the second pressure, wherein the second pressure is adapted to remain below the third pressure;8. The reciprocating pump (10) as claimed in claiml, wherein the liquid (20), and the charging liquid (90) comprises similar chemical and physical properties.

9. The reciprocating pump (10) as claimed in claiml, wherein the liquid (20), and the charging liquid (90) comprises dissimilar chemical and physical properties.

10. A method (300) to amplify discharge pressure gradient of a liquid comprising:drawing, by a piston positioned in a cylinder, the liquid from a first reservoir to the cylinder through a first valve by moving from a top dead center of the cylinder to a bottom dead center of the cylinder; wherein the liquid is placed at a first pressure inside the first reservoir and the cylinder; (310) characterized in that: drawing, by the piston, a charging liquid from a second a reservoir through a second valve upon closing the first valve to change a pressure of the liquid from the first pressure to a second pressure, wherein the charging liquid is stored in the second reservoir at the second pressure; wherein the second valve and the first valve are adapted to open and close respectively before the piston reaches the bottom dead center of the cylinder, wherein the second valve and the first valve are adapted to open and close simultaneously; (320) compressing, by the piston, the liquid to change the pressure of the liquid from the second pressure to a third pressure by moving from the bottom dead center of the cylinder to the top dead center of the cylinder; (330) and discharging, by a third valve, the liquid to an outlet upon changing the pressure of the liquid from the second pressure to the third pressure, thereby amplifying the discharge pressure gradient of the liquid. (340)

Images