KR102641915B1 - Dispensing pump - Google Patents

Abstract

The present invention relates to a constant volume discharge pump.
According to an embodiment of the present invention, it is configured to enable simultaneous and parallel fluid discharge through a plurality of fluid discharge holes during one drive cycle, enabling a fixed amount of fluid to be supplied to a plurality of demand sources without separately installing a distribution valve. A fixed-quantity discharge pump is disclosed that provides a compact structure and is configured to provide driving force to a pressurizing unit using a driving rod driven by electromagnetic force.

Description

Quantitative dispensing pump {DISPENSING PUMP}

The present invention relates to a fixed-quantity discharge pump, which is configured to enable simultaneous and parallel fluid discharge through a plurality of fluid discharge holes during one drive cycle, enabling a fixed-quantity supply of fluid to multiple demand sources without installing a separate distribution valve. It is configured to provide a driving force to a pressurizing unit using a driving rod driven by electromagnetic force, and relates to a fixed-quantity discharge pump that provides a compact structure.

A constant volume discharge pump is a type of positive displacement pump and refers to a pump in which the discharge amount per drive cycle is always constant. A fixed-quantity discharge pump is generally used to transport fluids such as chemicals or lubricants that have relatively high viscosity and require a fixed-quantity supply to the user.

As an example of the prior art, Republic of Korea Patent No. 10-0478898 (2005.03.16.) relates to a lubricating oil pump device and proposes a configuration that drives a plurality of fixed-quantity pistons using an operating piston operated by fluid pressure.

As another example of prior art, Republic of Korea Patent No. 10-2445094 (2022.09.15.) relates to a lubricating oil pump, comprising at least one operating chamber for a piston, and pressure fluid can be supplied to the operating chamber; , proposed a configuration in which pressure can be applied to the piston by the pressure fluid, and the pistons are connected to each other by at least one synchronization member.

As another example of prior art, Republic of Korea Patent No. 10-1396610 (2014.05.12.) relates to a lubricating device for a cylinder lubricating oil supply system and a cylinder lubricating oil supply method, in which one side is used to displace the distribution plate for the operation of the supply piston. A hydraulically driven lubricating device and method having a distribution plate in contact with the supply pistons and the other side in contact with two or more hydraulic pistons is proposed.

However, since the above prior technologies use a hydraulic system as a driving source for pressurizing and discharging fluid, the system configuration is complex and there are limitations in providing a compact device structure.

Republic of Korea registered patent 10-0478898 (2005.03.16.) Republic of Korea registered patent 10-2445094 (2022.09.15.) Republic of Korea registered patent 10-1396610 (2014.05.12.)

The present invention was developed in consideration of the above problems, and is configured to enable simultaneous and parallel fluid discharge through a plurality of fluid discharge holes during one drive cycle, allowing fluid to be distributed to a plurality of demand sources without separately installing a distribution valve. The purpose is to provide a fixed-quantity discharge pump that is configured to provide a fixed-quantity supply and provides a compact structure by providing driving force to a pressurizing unit using a driving rod driven by electromagnetic force.

According to one aspect of the present invention for achieving the above object, there is a fixed volume discharge pump that pressurizes fluid and discharges a fixed amount, comprising: a drive unit that provides a downward driving force based on electromagnetic force to a driving rod; a housing in which the drive unit is installed and supports the drive rod in a vertically movable manner; A plurality of piston operating holes extending up and down, a plurality of fluid discharge holes extending up and down along the same axis on the lower side of each piston operating hole and each equipped with a check valve, and one fluid inlet hole formed along the transverse direction; , a fluid distribution pipe formed to communicate with each of the piston operating holes and forming a flow path for distributing the fluid introduced through the fluid inlet hole to each of the piston operating holes, and formed on the upper side of the plurality of piston operating holes. a fluid discharge unit including a pressurized space and coupled to a lower portion of the housing; and a plurality of pistons that are respectively inserted and installed into each of the piston actuating holes in a form capable of moving up and down, and a plurality of springs that are inserted and installed into each of the pistons and are compressed when the piston moves downward to provide an upward restoring force, respectively. A pressurizing unit coupled to the upper end of the piston and including a pressurizing body driven up and down within the pressurizing space by receiving a downward driving force of the driving rod and an upward restoring force of the plurality of springs. Disclosed is a fixed-quantity discharge pump configured to include a do.

Preferably, the drive unit includes a drive rod that extends vertically and has a magnetic material in the middle, and an electromagnetic coil installed outside the magnetic material to provide a downward driving force to the drive rod.

Preferably, the housing includes a side wall portion installed to surround the drive unit from the side, an upper body portion supporting the upper end of the driving rod in a vertically movable form, and a lower end of the driving rod in a vertically movable shape. It consists of a lower body supported by a.

Preferably, the lower body extends up and down and has a central through hole supporting the lower end of the driving rod in an inserted state in a vertically movable manner, and inside the central through hole, on the lower side of the driving rod. It has an upper surface that contacts to provide a downward driving force and a lower surface that contacts the upper side of the pressing body to provide an upward restoring force, and a rod-shaped driving pin extending up and down is provided.

Preferably, the driving pin is configured to be replaceable with any one of two or more driving pins having different lengths.

Preferably, the upper body portion is provided with a central through hole that supports the upper end of the drive rod in a vertically movable inserted state, and the lower body portion is configured to support the lower end of the driving rod in a vertically movable inserted state. It is provided with another central through hole for support, and a dry bush is installed in each central through hole.

Preferably, the fluid discharge unit further includes a plurality of spring seats that are extended to the upper side of each piston operation hole and support lower ends of each spring.

Preferably, in the present invention, when the pressurizing body is driven upward within the pressurizing space by receiving the upward restoring force of the plurality of springs, each piston is driven upward, and inside each piston operating hole in communication with the fluid distribution pipe. fluid is introduced into the drive rod, and when the pressurizing body is driven downward within the pressurizing space by receiving the downward driving force of the driving rod, each piston is driven downward to release the fluid flowing into each piston operating hole. The fluid is discharged through the fluid discharge hole.

Preferably, each of the piston actuating holes is arranged symmetrically about the central axis of the driving rod.

This invention is configured to enable simultaneous and parallel fluid discharge through a plurality of fluid discharge holes during one drive cycle, and has the advantage of being able to supply a fixed amount of fluid to a plurality of demand sources without installing a separate distribution valve. .

In addition, the present invention has the advantage of providing a compact structure by providing driving force to the pressurizing unit using a driving rod driven by electromagnetic force.

1 is a perspective view of a constant volume discharge pump according to an embodiment of the present invention;
Figure 2 is a cross-sectional view of a constant volume discharge pump according to an embodiment of the present invention;
3A and 3B are enlarged cross-sectional views showing the fluid discharge unit and the pressurizing unit of the constant volume discharge pump according to an embodiment of the present invention;
Figure 4 is a transverse cross-sectional view of the fluid discharge unit of the constant volume discharge pump according to an embodiment of the present invention;
5 is a diagram showing the operating state of the constant volume discharge pump according to an embodiment of the present invention;
Figure 6 is a diagram for explaining the driving cycle of the constant volume discharge pump according to an embodiment of the present invention.

The present invention can be implemented in various other forms without departing from its technical spirit or main features. Accordingly, the embodiments of the present invention are merely examples in all respects and should not be construed as limited.

Terms such as first, second, etc. are used only for the purpose of distinguishing one component from another component. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected to or connected to the other component, but other components may also exist in between.

As used in this application, singular expressions include plural expressions, unless the context clearly dictates otherwise. In this application, terms such as “comprise”, “provide”, “have”, etc. are intended to express the presence of the components described in the specification or a combination thereof, but do not indicate the possibility that other components or features may be present or added. It is not excluded in advance.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a perspective view of a constant volume discharge pump according to an embodiment of the present invention, Figure 2 is a cross-sectional view of a constant volume discharge pump according to an embodiment of the present invention, and Figures 3a and 3b are fluid diagrams of a constant volume discharge pump according to an embodiment of the present invention. FIG. 4 is an enlarged cross-sectional view of the discharge unit and the pressurizing unit, and FIG. 4 is a transverse cross-sectional view of the fluid discharge unit of the constant-quantity discharge pump according to an embodiment of the present invention.

The constant-quantity discharge pump (P) of this embodiment is configured to enable simultaneous and parallel fluid discharge through a plurality of fluid discharge holes 34 during one drive cycle, and thus provides a fixed-quantity discharge of fluid to a plurality of demand sources without installing a separate distribution valve. It is configured to enable supply. For example, in this embodiment, the fluid may be a liquid with a relatively high viscosity, such as a chemical solution or lubricating oil.

The fixed-quantity discharge pump (P) of this embodiment is a pump that pressurizes the fluid (F) and discharges it in a fixed amount, and includes a drive unit (10), a housing (20), a fluid discharge unit (30), and a pressurizing unit (40). It is composed.

The driving unit 10 provides a downward driving force F1 based on electromagnetic force to the driving rod 12.

The driving unit 10 is built into the housing 20. The housing 20 supports the driving rod 12 in a vertically movable manner.

The fluid discharge unit 30 includes a plurality of piston operating holes 32 extending upward and downward, each extending upward and downward along the coaxial axis at the lower side of each piston operating hole 32, and a check valve 35. It is formed to communicate with a plurality of fluid discharge holes 34, respectively installed, one fluid inlet hole 36 formed along the transverse direction, and each of the piston operating holes 32, through the fluid inlet hole 36. A fluid distribution pipe 38 forming a flow path for distributing the introduced fluid F to each of the piston operating holes 32, and a pressurized space formed on the upper side of the plurality of piston operating holes 32 ( 39).

The fluid discharge unit 30 is coupled to the lower part of the housing 20. For example, the fluid discharge unit 30 can be manufactured by machining aluminum, but is not limited thereto.

Preferably, each of the piston operating holes 32 is symmetrically disposed about the central axis 12x of the driving rod 12.

For example, when four piston operating holes 32 are installed as shown in FIGS. 1 and 4, the four piston operating holes 32 are spaced at 90 degree intervals around the central axis 12x of the driving rod 12. are arranged symmetrically.

As another example, when two piston operating holes 32 are installed, the two piston operating holes 32 are symmetrically arranged at 180-degree intervals around the central axis 12x of the driving rod 12. .

Through this symmetrical arrangement structure, the constant-quantity discharge pump P of this embodiment can stably provide fluid inflow, distribution, and constant-quantity discharge.

The pressurizing unit 40 includes a plurality of pistons 42 that are respectively inserted and installed into each of the piston operating holes 32 in a form capable of moving up and down, and are inserted and installed into each of the pistons 42, and the piston 42 A plurality of springs 44 are compressed during downward movement to provide an upward restoring force (F2), and are coupled to the upper end (42a) of each piston (42) and provide a downward driving force (F1) of the driving rod (12). and a pressurizing body 46 that is driven up and down within the pressurizing space 39 by receiving the upward restoring force F2 of the plurality of springs 44.

Preferably, the fluid discharge unit 30 further includes a plurality of spring seats 37 that are expanded on the upper side of each piston operation hole 32 and support the lower end of each spring 44. It consists of: By using the spring seat 37, each spring 44 can maintain its position more stably.

For example, the check valve 35 of the fluid discharge unit 30 may be a ball check valve capable of transferring fluid in one direction using a ball and a spring, but is not limited thereto. The check valve 35 is opened by positive pressure when the piston 42 moves downward, and the fluid flowing into the piston operation hole 32 and/or the fluid distribution pipe 38 is discharged into the fluid discharge hole 34. It can be discharged through. In addition, the check valve 35 is closed by a restoring force (e.g., spring restoring force) when the piston 42 moves upward, so that the fluid flowing into the piston operation hole 32 and/or the fluid distribution pipe 38 is a fluid. Blocks discharge through the discharge hole (34).

In more detail, the drive unit 10 includes a drive rod 12 that extends vertically and has a magnetic body 13 in the middle portion 12c, and is installed outside the magnetic body 13 to It is configured to include an electromagnetic coil (14) that provides a downward driving force (F1) to (12). For example, the driving rod 12 may be made of a non-magnetic metal, and the magnetic body 13 may be made of a magnetic metal.

In this way, through a structure in which the driving rod 12 made of a non-magnetic metal is press-fitted to the magnetic material 13 made of a magnetic metal, the constant-quantity discharge pump P of this embodiment can be used even when used for a long period of time due to magnetization of the non-magnetic element. Performance degradation can be prevented.

For example, when power is applied to the electromagnetic coil 14 from a control unit (not shown), the magnetic material 13 receives electromagnetic force, generates a downward driving force F1, moves the driving rod 12 downward, and the power is cut off. When this happens, the electromagnetic force received by the magnetic material 13 disappears, so the downward driving force F1 disappears, and the driving rod 12 moves upward by receiving an upward restoring force F2 based on the plurality of springs 44.

The housing 20 includes a side wall portion 22 installed to surround the drive unit 10 from the side, and an upper body portion that supports the upper end portion 12a of the drive rod 12 in a vertically movable form ( 24) and a lower body 26 that supports the lower end 12b of the driving rod 12 in a vertically movable manner.

Preferably, the upper body portion 24 is provided with a central through hole 24a that supports the upper end portion 12a of the driving rod 12 in an inserted state in a vertically movable state, and the lower body portion 26 is provided with another central through-hole (26a) that supports the lower end (12b) of the driving rod (12) in an inserted state that can move up and down. Preferably, a dry bush (DU) is installed in each central through hole (24a, 26a). By installing the dry bush (DU), the constant volume discharge pump (P) of this embodiment can provide a more compact structure than using a general bearing.

In a preferred example, the lower body portion 26 extends up and down and includes a central through hole 26a that supports the lower end portion 12b of the drive rod 12 in an inserted state that can move up and down.

In addition, inside the central through hole 26a, an upper surface 16a is in contact with the lower side of the driving rod 12 and is provided with a downward driving force F1, and is in contact with the upper side of the pressing body 46. Thus, it has a lower surface (16b) that receives an upward restoring force (F2) and a rod-shaped driving pin (16) extending up and down is provided.

Preferably, the driving pin 16 is configured to be replaceable with any one of two or more driving pins 16 having different lengths. The length of the driving pin 16 can be understood as the vertical gap between the upper surface 16a and the lower surface 16b.

For example, when the length of the driving pin 16 is short as shown in Figure 3b, even if the vertical movement distance of the driving rod 12 is the same, the vertical movement distance of the pressurizing body 46 is shorter than in the case of Figure 3a. Therefore, the fluid discharge amount becomes less. In this way, the amount of fluid discharged during one drive cycle can be changed and set by replacing two or more drive pins 16 with different lengths.

The operating state of the constant volume discharge pump P of this embodiment will be described.

FIG. 5 is a diagram showing the operating state of the constant-quantity discharge pump according to an embodiment of the present invention, and FIG. 6 is a diagram for explaining the driving cycle of the constant-quantity discharge pump according to an embodiment of the present invention.

Referring to (a) of FIG. 5, when the power provided to the electromagnetic coil 14 from a control unit (not shown) is cut off, the electromagnetic force received by the magnetic material 13 disappears and the downward driving force F1 disappears.

In addition, when the pressurizing body 46 is driven upward within the pressurizing space 39 by receiving the upward restoring force F2 of the plurality of springs 44, each piston 42 is driven upward, The negative pressure generated in this process causes the fluid F to flow into each of the piston operating holes 32 in communication with the fluid distribution pipe 38.

Referring to FIG. 3A, the piston operating hole 32 can be divided into a portion 32a communicating with the upper side of the fluid distribution pipe 38 and a portion 32b communicating with the lower side of the fluid distribution pipe 38. As an example, In this way, the fluid (F) flowing in through the fluid inlet hole 36 by negative pressure passes through the fluid distribution pipe 38 to a portion of the piston operation hole 32 that communicates with the lower side of the fluid distribution pipe 38 ( It can mainly flow into 32b).

Referring to FIG. 4, the fluid F flowing in through the fluid inlet hole 36 is transported and distributed in the direction of A1 -> A2, A3, and A4 through the fluid distribution pipes 38a, 38b, 38c, and 38d. flows into each piston operating hole (32b). The unexplained symbol PG in FIG. 4 is a plug that closes the open end of the fluid distribution pipe 38.

At this time, the check valve 35 of the fluid discharge unit 30 is closed to prevent the fluid flowing into the piston operation hole 32 and/or the fluid distribution pipe 38 from being discharged through the fluid discharge hole 34. Block it.

In this process, the driving rod 12 also moves upward by receiving an upward restoring force F2 based on the plurality of springs 44 through the pressing body 46.

Referring to (b) of FIG. 5, when power is applied to the electromagnetic coil 14 from a control unit (not shown), the magnetic material 13 receives electromagnetic force and generates a downward driving force F1, causing the driving rod 12 to moves downward.

When the pressure body 46 is driven downward within the pressure space 39 by receiving the downward driving force F1 of the drive rod 12, each piston 42 is driven downward, and in this process, The fluid F flowing into each piston operating hole 32 is discharged through each fluid discharge hole 34 by positive pressure.

Referring to FIG. 3A, the fluid discharged through the fluid discharge hole 34 is mainly a fluid flowing into the portion 32b of the piston operation hole 32 that communicates with the lower side of the fluid distribution pipe 38. , part of the fluid flowing into the fluid distribution pipe 38 may also be discharged.

At this time, the check valve 35 of the fluid discharge unit 30 is opened to discharge the fluid flowing into the piston operation hole 32 and/or the fluid distribution pipe 38 through the fluid discharge hole 34.

Meanwhile, referring to FIG. 6, one drive cycle of the constant volume discharge pump P of this embodiment can be changed to various drive cycles by setting a control unit (not shown).

Although the present invention has been described with a focus on preferred embodiments with reference to the accompanying drawings, it is clear to those skilled in the art that many various and obvious modifications can be made from this description without departing from the scope of the present invention. Accordingly, the scope of the present invention should be interpreted by the stated claims to include these many modifications.

10: Drive unit
12: Drive rod
13: Magnetic material
14: electromagnetic coil
16: driving pin
20: housing
22: side wall part
24: Upper body
26: lower body
30: Fluid discharge unit
32: Piston operator
34: Fluid discharge hole
35: check valve
36: fluid inlet hole
37: Spring seat
38: fluid distribution pipe
39: Pressurized space part
40: Pressurization unit
42: piston
44: spring
46: Pressure body
DU: Dry Bush
F: fluid
P: constant discharge pump

Claims (9)

A fixed-quantity discharge pump that pressurizes fluid and discharges it in a fixed amount,
A driving unit that provides a downward driving force based on electromagnetic force to the driving rod;
a housing in which the drive unit is installed and supports the drive rod in a vertically movable manner;
A plurality of piston operating holes extending up and down, a plurality of fluid discharge holes extending up and down along the same axis on the lower side of each piston operating hole and each equipped with a check valve, and one fluid inlet hole formed along the transverse direction; , a fluid distribution pipe formed to communicate with each of the piston operating holes and forming a flow path for distributing the fluid introduced through the fluid inlet hole to each of the piston operating holes, and formed on the upper side of the plurality of piston operating holes. a fluid discharge unit including a pressurized space and coupled to a lower portion of the housing; and
A plurality of pistons that are respectively inserted and installed in a form capable of moving up and down in each of the piston operating holes, a plurality of springs that are inserted and installed in each of the pistons and are compressed during the downward movement of the piston to provide an upward restoring force, and each A pressurizing unit coupled to the upper end of the piston and including a pressurizing body driven up and down within the pressurizing space by receiving the downward driving force of the driving rod and the upward restoring force of the plurality of springs,
The driving unit is,
A driving rod extending up and down and having a magnetic material in the middle,
It includes an electromagnetic coil installed on the outside of the magnetic material to provide a downward driving force to the driving rod,
The housing is,
A side wall portion installed to surround the drive unit from the side,
an upper body portion supporting the upper end of the driving rod in a manner that allows for vertical movement;
A constant volume discharge pump, characterized in that it includes a lower body part that supports the lower end of the drive rod in a vertically movable form.
delete delete According to paragraph 1,
The lower body extends up and down and has a central through hole that supports the lower end of the drive rod in an inserted state that can move up and down,
Inside the central through hole, the upper surface is provided with a downward driving force by contacting the lower side of the driving rod, and the lower surface is provided with an upward restoring force by contacting the upper side of the pressing body, and has a rod shape extending vertically. A constant-quantity discharge pump, characterized in that it is provided with a driving pin.
According to paragraph 4,
A fixed volume discharge pump, wherein the driving pin is replaceable with any one of two or more driving pins having different lengths.
According to paragraph 1,
The upper body has a central through hole that supports the upper end of the driving rod in an inserted state that can move up and down,
The lower body has another central through hole that supports the lower end of the drive rod in an inserted state that can move up and down,
A constant volume discharge pump characterized by a dry bush installed in each central through hole.
According to paragraph 1,
The fluid discharge unit is,
A fixed-quantity discharge pump, characterized in that it further includes a plurality of spring seating ports that are extended to the upper side of each of the piston operating holes and support a lower end of each spring.
According to paragraph 1,
Upon receiving the upward restoring force of the plurality of springs, when the pressurizing body is driven upward within the pressurizing space, each piston is driven upward to allow fluid to flow into each of the piston operating holes in communication with the fluid distribution pipe,
When the pressurizing body is driven downward within the pressurizing space by receiving the downward driving force of the driving rod, each piston is driven downward and the fluid flowing into each piston operating hole is discharged through each fluid discharge hole. A fixed-quantity discharge pump characterized in that it discharges through the water.
According to paragraph 1,
A constant volume discharge pump, wherein each of the piston operating holes is symmetrically disposed about the central axis of the driving rod.

Images