HIGH-VISCOSITY LIQUID FEEDING BOOSTER PUMP

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The present disclosure relates to a high-viscosity liquid feeding booster pump. The booster pump includes: a body having an actuator mounted at one side thereof and a discharge valve formed at the other side thereof, the body being formed internally with a chamber; a plunger configured to be inserted into the body, and advanced or retracted relative to the body by the operation of the actuator to generate a compressive force or a suction force; and a charge valve disposed at an intake port formed at an upper portion of one side of the body in such a manner as to be spaced apart from a discharge valve, and configured to be opened or closed in cooperation with the advancing or retracting operation of the plunger to supply a fluid to the inside of the body or interrupt the supply of the fluid.

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Description
TECHNICAL FIELD

The present disclosure relates to a booster pump, and more particularly, to a high-viscosity liquid feeding booster pump that minimizes the pulsation of the pump to increase the pressure of the liquid so that the liquid is fed quantitatively.

BACKGROUND ART

As a metering pump that supplies a high-viscosity liquid quantitatively using a discharge gun, a gear pump is bulky and heavy. For this reason, a lightweight and pulsation-free secondary metering pump of a piston type based on a ball screw is widely used as a booster pump.

A booster pump is disclosed in Korean Patent Registration No. 10-1250985 (registered on Mar. 29, 2013).

The booster pump of the above patent includes a suction header connected to an intake pipe through which a fluid is supplied to allow the fluid supplied from the intake pipe to be introduced thereto, a discharge header to which a discharge pipe through which the fluid introduced into the suction header is discharged is connected, and a pump unit connected between the suction header and the discharge header and configured to increase the pressure of the fluid supplied from the suction header and discharge the pressure-increased fluid to the discharge header. The pump unit includes a driving pump configured to suck the fluid from the suction header and discharge the sucked fluid to the discharge header, a suction gate valve disposed between the driving pump and the suction header and configured to supply the fluid introduced thereto from the suction header to the driving pump or interrupt the supply of the fluid to the driving pump, a discharge gate valve disposed between the driving pump and the discharge header and configured to supply the fluid discharged from the driving pump to the discharge header or interrupt the supply of the fluid to the discharge header, a check valve disposed between the driving pump and the discharge header and configured to prevent the backflow of the fluid discharged to the discharge header from the driving pump, and a leakage checking unit disposed between the check valve and the driving pump and including a shield plate configured to reduce an initial pressure of the fluid discharged to the check valve from the driving pump. The discharge header includes a flexible joint unit disposed at a portion to which the discharge pipe is connected and configured to be flexibly bent to prevent a shock of the fluid, which is caused by the operation of the driving pump, from being transferred to the discharge pipe.

Meanwhile, FIGS. 1 and 2 show a conventional booster pump in accordance with the prior art. In FIGS. 1 and 2, when a screw 1a is rotated by an actuator 10a, a nut unit 2a coupled to the screw 1a is moved vertically and simultaneously a plunger 3a coupled to the nut unit 2a is moved vertically to cause a liquid to be filled in a chamber 120a or the liquid filled in the chamber 120a to be discharged.

A charge valve 4a and a discharge valve 5a are respectively disposed at a liquid charge port and a liquid discharge port of the booster pump so as to be opened/closed in response to an instruction from a control device. Thus, when the screw 1a is rotated by the actuator 10a and simultaneously the plunger 3a coupled to the nut unit 2a is moved upwardly, the charge valve 4a at the liquid charge port is opened to cause the liquid to be introduced into the chamber 120a.

When the plunger reaches a top dead point where the liquid is filled, the charge valve 4a is closed by the control device and the actuator 10a starts to be reversely rotated to cause the nut unit 2a and the plunger 3a to be moved downwardly simultaneously so that the discharge valve 5a is opened by the control device to cause the liquid filled in the chamber 120a to be discharged through a discharge port 32a.

At a bottom dead point where the discharge of the liquid is completed, the discharge valve 5a is closed by the control device and the actuator 10a is reversely rotated to cause the plunger 3a to be moved upwardly. Similarly, when the charge valve 4a is opened by the control device simultaneously with the upward movement of the plunger 3a, the liquid filling or charging process is repeatedly performed.

FIG. 3 is a cross-sectional view showing a viscosity liquid filling and discharging process of a booster pump in accordance with the prior art.

In FIG. 3, because the liquid is always adhered to or gathered in a distal end of the plunger 3a and a corner of the bottom end of the inside of the chamber 120a, it is denaturized and coagulated over time so that solidified substances X left as liquid residues become large gradually and thus fragments are partially separated away from the solidified substances X, thus causing a problem in that the discharge port 32a is blocked.

DISCLOSURE Technical Problem

Accordingly, the present disclosure has been made to solve the aforementioned problems occurring in the prior art, and it is an object of the present invention to provide a high-viscosity liquid feeding booster pump in which a charged liquid feeding passage is spirally formed on the inner peripheral surface of a chamber so that a viscous liquid is primarily sequentially accumulated at a discharge part side in the order in which the liquid is filled or charged by a piston or plunger that repeatedly performs the ascending and descending motion using a ball screw and so that when the piston or plunger descends to extrude the liquid, a first filled viscous liquid is first discharged and simultaneously the charged liquid feeding passage is opened along a distal front end of the piston or plunger upon the charging of the liquid to always fill a new viscous liquid to prevent the liquid from being adhered to and left around the piston or plunger, and in which the spirally formed passage is rounded smoothly to minimize a cause of sedimentation of a liquid residue.

Technical Solution

To achieve the above and other objects, in accordance with the present disclosure, there is provided a booster pump including:

a body having an actuator mounted at one side thereof and a discharge valve formed at the other side thereof, the body being formed internally with a chamber;

a plunger configured to be inserted into the body, and advanced or retracted relative to the body by the operation of the actuator to generate a compressive force or a suction force; and

a charge valve disposed at an intake port formed at an upper portion of one side of the body in such a manner as to be spaced apart from a discharge valve, and configured to be opened or closed in cooperation with the advancing or retracting operation of the plunger to supply a fluid to the inside of the body or interrupt the supply of the fluid,

wherein the body includes a charged liquid feeding passage spirally formed on the inner peripheral surface of the chamber thereof in such a manner as to fluidically communicate with the intake port connected to the charge valve, and

wherein the charged liquid feeding passage has an outlet formed in proximity to the discharge valve.

The plunger may include a front end formed protrudingly in a conical shape, and the chamber may include a seat formed concavely in a conical shape at a bottom thereof in such a manner as to be in close contact with the front end of the plunger.

A connection part between the intake port and the chamber may be chamfered to form a bent part.

Advantageous Effect

In accordance with the booster pump of the present invention as constructed above, a problem is solved in that a liquid residue is produced inside the chamber due to the incompleteness of the first-in first-out operation and a sediment solidified or cured over time is separated apart from the inside of the chamber to block the discharge port, so that the charge and discharge of the viscous liquid is performed in a first-in first-out manner inside the chamber and a structure of the pump is improved to prevent the liquid residue from being left in the chamber to minimize generation of solidified or cured substances, thereby reducing unnecessary time and cost and basically preventing an unpredictable accident such as a stop of a production line and thus significantly increasing productivity.

BRIEF DESCRIPTION OF THE DRAWINGS

The above objects, other features and advantages of the present disclosure will become more apparent by describing the preferred embodiments thereof with reference to the accompanying drawings, in which:

FIGS. 1 and 2 are cross-sectional views showing a conventional booster pump in accordance with the prior art;

FIG. 3 is a cross-sectional view showing a state in which a liquid residue is left in a liquid filling and discharging process of a booster pump in accordance with the prior art;

FIG. 4 is a front cross-sectional view showing a booster pump in accordance with an embodiment of the present disclosure;

FIG. 5 is a partially enlarged front cross-sectional view showing the booster pump of FIG. 4;

FIG. 6 is a perspective view showing the booster pump of FIG. 5; and

FIGS. 7(a) to 7(i) are cross-sectional views showing a liquid filling and discharging process of the booster pump in accordance with an embodiment of the present disclosure.

 EXPLANATION ON REFERENCE NUMERALS OF MAIN ELEMENTS IN THE DRAWINGS

    • 100: body
    • 120: chamber
    • 130: intake port
    • 140: bent part
    • 170: seat
    • 180: discharge port
    • 200: plunger
    • 300: charge valve

PREFERRED EMBODIMENTS OF THE INVENTION

Hereinafter, the preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. However, the embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. For the sake of a clearer understanding of the present disclosure, the thickness of lines or the size of constituent elements shown in the drawings may be illustrated exaggeratingly for the clarity and convenience of description.

In the drawings, FIG. 4 is a front cross-sectional view showing a booster pump in accordance with an embodiment of the present disclosure, FIG. 5 is a partially enlarged front cross-sectional view showing the booster pump of FIG. 4, FIG. 6 is a perspective view showing the booster pump of FIG. 5, and FIGS. 7(a) to 7(i) are cross-sectional views showing a liquid filling and discharging process of the booster pump in accordance with an embodiment of the present disclosure.

As shown in FIGS. 4 to 7, a high-viscosity liquid feeding booster pump in accordance with the present invention includes: a body 100 having an actuator (not shown) mounted at one side thereof and a discharge valve 400 formed at the other side thereof, the body 100 being formed internally with a chamber 120; a plunger 200 configured to be inserted into the body 100, and advanced or retracted relative to the body 100 by the operation of the actuator to generate a compressive force or a suction force; and a charge valve 300 disposed at one side of the body 100 and configured to be opened or closed in cooperation with the advancing or retracting operation of the plunger 200 to supply a fluid to the inside of the body 100 or interrupt the supply of the fluid.

Herein, the charge valve 300 is disposed at an intake port 130 formed at an upper portion of one side of the body 100 in such a manner as to be spaced apart from a discharge valve 400. A connection part between the intake port 130 and the chamber 120 is chamfered to form a bent part 140.

A fluid supply unit (not shown) for supplying a fluid is provided at the outside of the charge valve 300. In this case, a high-viscosity liquid is mainly used as the fluid.

The chamber 120 is vertically formed within the body 100. The plunger 200 ascends or descends in a state of being inserted into the chamber 120 to induce the suction or compression of the fluid through the charge valve 300.

An intake port 130 is formed at an upper portion of one side of the body 100. The body includes a charged liquid feeding passage 600 spirally formed on the inner peripheral surface of the chamber thereof in such a manner as to fluidically communicate with the intake port 130. The charged liquid feeding passage 600 has an outlet 620 formed at a lower end thereof in proximity to a seat 170.

Thus, when the plunger 200 starts to ascend, a suction force is generated from the charge valve 300 and the outlet 620 formed at the lower end of the charged liquid feeding passage 600 connected to the intake port 130 so that the charge valve 300 is opened to cause the fluid from the fluid supply unit to be introduced into the chamber 120.

Herein, the liquid filled in a liquid feed passage section extending from the upper end, i.e., a portion connected to the intake port 130, of the charged liquid feeding passage 600 to the outlet 620 of the charged liquid feeding passage 600 is introduced into the chamber 120, and a newly introduced liquid is charged in the charged liquid feeding passage 600.

When the plunger 200 is lowered, the fluid charged in the chamber 120 is compressed and is injected to the outside through the discharge valve 400 and the nozzle 430.

In accordance with embodiment of the present invention, the charging liquid feed passage 600 is spirally formed on the inner peripheral surface of the chamber 120 of the body 100 in such a manner as to fluidically communicate with the intake port 130 connected to the charge valve 300, and the outlet 620 of the charging liquid feed passage 600 is formed in proximity to the discharge port 180 connected to the discharge valve 400.

In other words, the charged liquid feeding passage 600 is spirally formed in a single number or plural numbers on the inner peripheral surface of the chamber 120. The charged liquid feeding passage 600 is formed on the inner peripheral surface of the chamber 120 in a shape which is recessed into a predetermined depth so that when the plunger 200 ascends while the outer peripheral surface of the plunger 200 comes into close contact with the inner peripheral surface of the chamber 120, the liquid flows out of the charged liquid feeding passage 600 opened in a circumferential direction and is filled in the chamber 120 in an accumulated manner. Further, when the plunger 200 descends, it discharges the liquid contained in the chamber 120 and simultaneously pressurizes the fluid within the charged liquid feeding passage 600 so that the fluid is effectively fed to the final outlet through the spirally formed liquid feeding passage 600, and thus is discharged to the discharge valve 400 while inducing a swirling motion of a fluid gathered in the bottom of the chamber 120, which is adjacent to the discharge valve 400, thereby preventing a residue from being left at the bottom of the chamber 120.

In the meantime, the plunger 200 includes a front end 25 formed protrudingly in a conical shape, and the chamber 120 includes a seat 170 formed concavely in a conical shape at the bottom thereof in such a manner as to be in close contact with the front end 250 of the plunger 200.

As such, the front end 250 of the plunger 250 is formed protrudingly in a sharpening shape so that the surface area of a portion where a high-viscosity liquid will be left is reduced. Moreover, the bottom of the chamber 120, with which the front end of the plunger 200 is in close contact, is formed with the seat 170 having a shape corresponding to in a conical shape. The discharge port 180 is formed at the central portion of the seat 170 so as to fluidically communicate with the discharge valve 400.

Thus, the high-viscosity liquid intensively gathered in the center of the seat 170 is discharged through the discharge port 180. Further, because the seat 170 is recessed concavely, the high-viscosity liquid can flow to the center of the seat 170, thereby preventing the high-viscosity liquid from being left in the seat 170. In addition, the plunger 200 is lifted, the charged liquid feeding passage 600 is opened along the front end of the plunger 200 to fill a liquid in the chamber 120 so that a new liquid is always filled in an upper layer portion of the charged liquid feeding passage 600, thereby completely attaining a first-in first-out operation of the liquid.

Hereinafter, the operation of the high-viscosity liquid feeding booster pump in accordance with the present invention will be described.

As shown in FIG. 7, the operation order of booster pump is performed in an order of (a) to (i).

FIG. 7(a) shows a state in which the plunger 200 is positioned at the lowest point and the liquid is completely discharged from the chamber of the body.

FIGS. 7(b) to 7(h) sequentially shows the ascending operation of the plunger 200. In FIGS. 7(b) to 7(h), a new liquid filled in a passage section extending from the intake port 130 to the outlet of the charged liquid feeding passage 600, which is connected to the intake port 130, starts to be filled in the chamber 120, starting from the bottom of the chamber 120.

Arrows indicated in FIGS. 7(b) to 7(h) denote liquid-filled positions.

FIG. 7(i) shows a state in which the plunger 200 descends to discharge the liquid after the liquid is completely filled in the chamber.

Thus, because the present invention follows a first-in first-out operation in which a new liquid is charged in the chamber and then is discharged, the plunger 200 is maintained in a clean state to prevent the viscous liquid form being accumulated in and adhered to the distal end of the plunger 200

Further, the lower end of the plunger 200 and the seat 170 of the chamber 120 are machined in a conical shape having a gradient so that the liquid can be rapidly discharged without being left in the chamber upon the discharge thereof.

While the present invention has been described in connection with the specific embodiments illustrated in the drawings, they are merely illustrative, and the invention is not limited to these embodiments. It is to be understood that various equivalent modifications and variations of the embodiments can be made by a person having an ordinary skill in the art without departing from the spirit and scope of the present invention. Therefore, the true technical scope of the present invention should not be defined by the above-mentioned embodiments but should be defined by the appended claims and equivalents thereof.

INDUSTRIAL APPLICABILITY

The present disclosure can provide a high-viscosity liquid feeding booster pump that minimizes the pulsation of the pump to increase the pressure of the liquid so that the liquid is fed quantitatively.

Claims

1. A booster pump comprising:

a body having an actuator mounted at one side thereof and a discharge valve formed at the other side thereof, the body being formed internally with a chamber;
a plunger configured to be inserted into the body, and advanced or retracted relative to the body by the operation of the actuator to generate a compressive force or a suction force; and
a charge valve disposed at an intake port formed at an upper portion of one side of the body in such a manner as to be spaced apart from a discharge valve, and configured to be opened or closed in cooperation with the advancing or retracting operation of the plunger to supply a fluid to the inside of the body or interrupt the supply of the fluid,
wherein the body includes a charged liquid feeding passage spirally formed on the inner peripheral surface of the chamber thereof in such a manner as to fluidically communicate with the intake port connected to the charge valve, and
wherein the charged liquid feeding passage has an outlet formed in proximity to the discharge valve.

2. The booster pump according to claim 1, wherein the plunger comprises a front end formed protrudingly in a conical shape, and the chamber comprises a seat formed concavely in a conical shape at a bottom thereof in such a manner as to be in close contact with the front end of the plunger.

3. The booster pump according to claim 1, wherein a connection part between the intake port and the chamber is chamfered to form a bent part.

Patent History
Publication number: 20160097378
Type: Application
Filed: Sep 2, 2014
Publication Date: Apr 7, 2016
Applicant:
Inventors: Hee Kyun KIM (Gunpo-si), Dong Man PARK (Siheung-si)
Application Number: 14/650,872
Classifications
International Classification: F04B 11/00 (20060101); F04B 53/16 (20060101); F04B 53/10 (20060101); F04B 53/14 (20060101); F04B 15/02 (20060101); F04B 19/22 (20060101);