KR20200040543A - Proportional control valve apparatus for mixing incompressible fluid material - Google Patents

Abstract

The present invention relates to a proportional control valve device for mixing incompressible fluids, capable of precisely and proportionally mixing a first fluid and a second fluid with a simple structure. According to the present invention, the proportional control valve device for mixing incompressible fluids comprises: a direct current motor; a reduction gear; a fixed body; and a movable body, wherein the fixed body includes a first inflow path, a second inflow path, and a mixing flow path, and the movable body includes a first movable flow path, a second movable flow path, and a third movable flow path.

Description

Proportional control valve apparatus for mixing incompressible fluid material

The present invention relates to a proportional control valve device for fluid mixing, and more particularly, to an apparatus for precisely proportionally mixing an incompressible fluid such as hot water and cold water.

In the case of mixing incompressible fluids whose volume does not change with pressure, such as hot water and cold water, a valve device for mixing is used. For example, in the bio 3D printer device, it is necessary to maintain a constant temperature in a state in which the biomaterial injected through the injection nozzle is accommodated in the syringe of the dispenser unit. In this case, by mixing the hot water at a constant temperature and the cold water at a constant temperature to obtain a mixed water at a desired temperature, the mixed water is heat exchanged with a syringe in a non-contact state so that the biomaterial contained in the syringe is maintained at a constant temperature. can do.

An example of a known flow proportional control valve is disclosed in Korean Patent Registration No. 1011642. The flow proportional control valve disclosed in the registered patent includes a solenoid valve controlled by an electrical signal. However, a solenoid valve including a component that controls a flow rate by an electrical signal, such as a solenoid valve, gradually degrades as the number of uses increases, and thus there is a problem that precise control of the flow rate is not achieved.

In addition, in the case of a device including a solenoid valve, there is a problem in that it is difficult to miniaturize due to a complicated structure as well as a high manufacturing cost.

The object of the present invention is to solve the problems as described above, to control the bio-material contained in the dispenser portion of the bio 3D printer at a constant temperature, hot water and cold water can be mixed in a very precise proportion, An object of the present invention is to provide a proportional control valve device for incompressible fluid mixing, which is capable of miniaturization, simple structure, low manufacturing cost, and excellent durability.

In order to achieve the above object, the proportional control valve device for mixing incompressible fluids according to an embodiment of the present invention is a valve device for proportionally mixing a plurality of incompressible fluids made of different temperatures or different materials,

DC motor;

A reduction gear coupled with the rotating shaft of the DC motor to increase torque and reduce rotation speed;

A fixed body installed to be fixed to the DC motor; And

Includes; movable body rotatably installed on the fixed body,

The fixed body is disposed so as to be spaced apart from the first inflow passage along the rotational direction of the movable body, the first inflow passage through which the first fluid flows, the second inflow passage through which the second fluid flows, and the first inflow passage, and It has a mixed flow path disposed opposite the second flow path,

An extension line of the first inflow passage and the second inflow passage is formed to intersect at one point,

The movable body includes a first movable passage corresponding to the first inflow passage, a second movable passage corresponding to the second inflow passage, and a third movable passage corresponding to the mixed passage,

The first movable flow passage and the second movable flow passage join to form a third movable flow passage,

When the center line of the first movable flow path and the center line of the first flow path coincide with each other, the connection between the second movable flow path and the second flow path is completely blocked,

When the center line of the second movable flow path and the center line of the second flow path coincide with each other, the connection between the first movable flow path and the first flow path is completely blocked,

When the first movable flow passage and the first flow passage are partially communicated, the second movable flow passage and the second flow passage are also partially communicated, and the first movable flow passage and the second movable flow passage are introduced into the first flow passage. The sum of the fluid and the second fluid is always constant,

The third movable flow path is always in communication with the mixed flow path in a position where the first movable flow path or the second movable flow path communicates with the first flow path or the second flow path.

Preferably, the third movable flow path is configured to be blocked from the mixed flow path in a position where the first movable flow path and the second movable flow path are completely blocked from the first flow path and the second flow path.

It is disposed between the DC motor and the reduction gear and has a sealing part to prevent the DC motor from being contaminated by moisture.

It has a movable body accommodating portion consisting of a groove in the form of a cylinder closed upward and open downward in the central portion of the fixed body,

The movable body is a cylindrical structure and is accommodated in the movable body accommodating portion and rotatably installed in the fixed body,

A sealing ring accommodating groove formed in the shape of a concave groove along the outer circumferential surface of the movable body is provided,

It is preferable that the sealing ring is coupled to the sealing ring receiving groove to prevent the fluid of the first movable passage, the second movable passage, and the third movable passage from leaking out of the fixed body.

The fixed body has a plurality of through holes formed in the direction of the rotation axis of the DC motor,

It is provided so as to correspond to the through-hole from the DC motor or the sealing portion extending from the DC motor parallel to the rotational axis of the DC motor toward the fixing body and having a female screw portion formed therein, corresponding to the through hole,

The fixing body is preferably fixed to the DC motor by a fixing bolt screwed to the fixing column through the through hole.

The proportional control valve device for incompressible fluid mixing according to the present invention provides an effect of precisely mixing each incompressible first fluid and second fluid in a very simple structure by a DC motor. In addition, the valve device according to the present invention can be precisely controlled the mixing ratio of the first fluid and the second fluid by rotating the movable body to a constant position by a DC motor, so it has excellent durability and low manufacturing cost. In addition, since the valve device according to the present invention does not include a structure such as a solenoid, it has an advantage of miniaturization.

1 is a perspective view of a proportional control valve device for incompressible fluid mixing according to a preferred embodiment of the present invention.
FIG. 2 is an exploded perspective view of the valve device shown in FIG. 1.
3 is a cross-sectional view taken along line III-III shown in FIG. 1.
4 is a view showing a state in which only the first fluid in FIG. 3 is supplied to the movable body.
FIG. 5 is a view showing a state in which the first fluid and the second fluid are proportionally mixed in FIG. 3.
FIG. 6 is a view showing a state in which supply of the first fluid and the second fluid is blocked in FIG. 3.
FIG. 7 is a cross-sectional view taken along line VIII-V in FIG. 1 and shows the installation structure of the sealing ring.

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

1 is a perspective view of a proportional control valve device for incompressible fluid mixing according to a preferred embodiment of the present invention. FIG. 2 is an exploded perspective view of the valve device shown in FIG. 1. 3 is a cross-sectional view taken along line III-III shown in FIG. 1. 4 is a view showing a state in which only the first fluid in FIG. 3 is supplied to the movable body. FIG. 5 is a view showing a state in which the first fluid and the second fluid are proportionally mixed in FIG. 3. FIG. 6 is a view showing a state in which supply of the first fluid and the second fluid is blocked in FIG. 3. FIG. 7 is a cross-sectional view taken along line VIII-V in FIG. 1 and shows the installation structure of the sealing ring.

1 to 7, the proportional control valve device 10 (hereinafter referred to as a "valve device") for mixing an incompressible fluid according to a preferred embodiment of the present invention includes a plurality of incompressible fluids made of different temperatures or different materials. It is a valve device for mixing proportionally.

The valve device 10 includes a DC motor 20, a reduction gear 40, a sealing portion 30, a fixed body 50 and a movable body 70.

The DC motor 20 is a device that generates rotational motion by DC power. The DC motor 20 may be a known motor.

The reduction gear 40 is mechanically coupled to the rotating shaft of the DC motor 20. The reduction gear 40 serves to increase the torque of the rotating shaft of the DC motor 20 while reducing the number of revolutions. The reduction gear 40 may adopt a known structure.

The sealing part 30 is disposed between the DC motor 20 and the reduction gear 40. The sealing part 30 is a kind of sealing member that performs a dustproof and waterproof action to prevent the inside of the DC motor 20 from being contaminated by moisture. The sealing portion 30 may be made of rubber or silicone resin. Depending on the embodiment, the sealing part 30 may not be provided.

The fixed body 50 is installed to be fixed to the DC motor 20. The fixed body 50 is provided with a plurality of through holes (51). It is fixed to the fixing column 60 protruding toward the fixing body 50 from the sealing portion 30 or the DC motor 20 at a position corresponding to the through hole 51. An inner circumferential surface of the fixing column 60 forms a hollow portion, and a female screw portion is formed in the hollow portion. The fixing body 50 is seated at the end of the fixing column 60, penetrates through the through hole 51 and is sealed by a fixing bolt 80 screwed to the fixing column 60, 30 Or it is fixed to the DC motor 20.

The fixed body 50 includes a movable body accommodating portion 52, a first inflow passage 54, and a second inflow passage 56.

The movable body accommodating portion 52 may be configured as a cylinder-shaped groove portion in which the upper portion is closed at the central portion of the fixed body 50 and opened downward. The movable body accommodating portion 52, the movable body 70 to be described later is rotatably installed.

The first inflow passage 54 is a passage that passes through the outer surface of the movable body 70 to be connected to the movable body receiving portion 52. A first fluid is introduced into the first inflow passage 54.

The second inflow passage 56 is a passage penetrated to be connected to the movable body receiving portion 52 from the outer surface of the movable body 70. A second fluid is introduced into the second inflow passage 56. The second inflow passage 56 is disposed to be spaced apart from the first inflow passage 54 along the rotational direction of the movable body 70. One mixing channel 58 is disposed opposite the first inflow channel and the second inflow channel 56. The mixing flow passage 58 is a flow passage formed through the outer surface of the fixed body 50 to be connected to the movable body receiving portion 52.

The extension lines of the first inflow passage 54 and the second inflow passage 56 are formed to intersect at one point. More specifically, a point at which the extension lines of the first inflow passage 54 and the second inflow passage 56 intersect is present in the movable body accommodating part 52.

The movable body 70 is rotatably installed on the fixed body 50.

The movable body 70 is a columnar structure. A ring-shaped sealing ring 78 is installed on the outer circumferential surface of the movable body 70 so that hot water, cold water, or mixed water does not leak to a portion facing the fixed body 50. In the portion where the sealing ring 78 is installed, an outer circumferential surface of the movable body 70 is concave and a sealing ring receiving groove 76 extending around the outer circumferential surface is provided. The sealing ring 78 rotates integrally with the movable body 70. The center of the movable body 70 is fixed to the rotation axis of the reduction gear 40 to rotate integrally with the rotation axis of the reduction gear 40.

The movable body 70 includes a first movable flow passage 71, a second movable flow passage 73, and a third movable flow passage 75.

The first movable flow passage 71 corresponds to the first flow passage 54. The inlet of the first movable flow passage 71 is opened through the outer peripheral surface of the movable body 70. The second movable flow passage 73 corresponds to the second flow passage 56. The second movable flow passage 73 opens through the outer peripheral surface of the movable body 70. The third movable flow passage 75 is a flow passage formed by joining the first movable flow passage 71 and the second movable flow passage 73. The third movable flow passage 75 is disposed to correspond to the mixed flow passage 58. The first movable flow passage 71, the second movable flow passage 73, and the third movable flow passage 75 cooperate to form a Y-shaped structure. The outlet of the third movable flow path 75 is opened through the outer peripheral surface of the movable body 70. The cross-sectional area of the third movable flow passage 75 is formed to be larger than that of the mixed flow passage 58.

When the center line of the first movable flow passage 71 and the center line of the first flow passage 54 coincide with each other, the connection between the second movable flow passage 73 and the second flow passage 56 is completely blocked. do. Meanwhile, when the center line of the second movable flow passage 73 and the center line of the second flow passage 56 coincide with each other, the connection between the first movable flow passage 71 and the first flow passage 54 is completely blocked. It is arranged as much as possible. Meanwhile, when the first movable flow passage 71 and the first flow passage 54 are partially communicated, the second movable flow passage 73 and the second flow passage 56 are also partially communicated. When the first flow channel 54 and the first movable flow channel 71 are in communication, or when the second flow channel 56 and the second movable flow channel 73 are in communication, the first movable flow channel 71 ) And the sum of the first fluid and the second fluid introduced into the second movable flow path 73 are always arranged to remain constant.

The third movable flow passage 75 is always in a position where the first movable flow passage 71 or the second movable flow passage 73 communicates with the first flow passage 54 or the second flow passage 56. It is arranged to communicate with the mixing flow path (58).

On the other hand, the third movable flow path (71) and the second movable flow path (73) at the position completely blocked from the first flow path (54) and the second flow path (56), the third movable flow path ( 75) is configured to be blocked from the mixing flow path (58). Accordingly, as the movable body 70 is rotated by the DC motor 20, the first fluid and the second fluid introduced through the first inflow passage 54 and the second inflow passage 56 are proportional. Is mixed and discharged through the mixing flow path 58. For example, when the first fluid supplied to the first inflow passage 54 is water at 50 ° C, and the second fluid flowing through the second inflow passage 56 is water at 4 ° C, the valve device 10 ) The temperature of the mixed water discharged through can be precisely controlled in the range from 4 ℃ to 50 ℃. The valve device 10 is structurally simple and implements an effect of controlling the temperature control of the mixed fluid with high precision in multiple stages.

The sealing ring 78 prevents the fluid in the first movable flow passage 71, the second movable flow passage 73, and the third movable flow passage 75 from leaking out of the fixed body 50.

Hereinafter, a method of controlling the temperature by proportionally mixing hot and cold water, which is an incompressible fluid and having different temperatures, using the valve device 10 including the above-described components will be described in detail.

Hot water is supplied to the first inflow passage 54. It is assumed that the temperature of the hot water is 50 ° C. In addition, cold water is supplied to the second inflow passage 56. The temperature of cold water is assumed to be 4 ° C. The movable body 70 is rotatably installed with respect to the fixed body 50. When the temperature of the mixed water discharged to the mixing flow path 58 is to be maintained at 50 ° C., the movable body 70 so that the center line of the first flow path 54 and the center line of the first movable flow path 71 coincide. ) Is rotated by operating the DC motor 20. As described above, when the center line of the first movable flow passage 71 and the center line of the first flow passage 54 coincide with each other, the connection between the second movable flow passage 73 and the second flow passage 56 is Is completely blocked. Therefore, the temperature of the water discharged through the third movable flow passage 75 and the mixing flow passage 58 is kept constant at 50 ° C.

On the other hand, when the temperature of the water discharged to the mixing flow path 58 is to be maintained at 4 ° C., the movable body 70 so that the center line of the second flow path 56 coincides with the center line of the second movable flow path 73. ) Is rotated by operating the DC motor 20. As described above, when the center line of the second movable flow passage 73 and the center line of the second flow passage 56 coincide with each other, the connection between the first movable flow passage 71 and the first flow passage 54 is Is completely blocked. Therefore, the temperature of the water discharged through the third movable flow passage 75 and the mixed flow passage 58 to the mixed flow passage 58 is kept constant at 4 ° C.

On the other hand, when the temperature of the water discharged to the mixing flow path 58 is to be maintained at 27 ° C., the operation is performed such that only 50% of the cross-sectional area communicating with the first flow path 54 and the first movable flow path 71 communicates with each other. The body 70 is rotated by the DC motor 20. In this case, the second flow path 56 and the second movable flow path 73 communicate with each other through the remaining 50% cross-sectional area. Accordingly, water discharged through the third movable flow path 75 and the mixing flow path 58 is in a state in which hot water and cold water are mixed at a ratio of 50:50. Accordingly, the temperature of the water discharged to the mixing passage 58 can be maintained at 27 ° C.

As described above, as the movable body 70 is rotated to a certain specific position, the amount of hot and cold water supplied to the first movable flow passage 71 and the second movable flow passage 73 can be proportionally and precisely adjusted. Therefore, it is possible to control the temperature of the water discharged through the mixing passage 58 in a very precise manner in multiple stages.

In addition, by rotating the movable body 70 of the valve device 10, the first inflow passage 54, the first movable passage 71, the second inflow passage 56, and the second movable passage ( 73) moves to a position that is not in full communication. In this case, since the communication between the mixing flow passage 58 and the third movable flow passage 75 is completely blocked, the valve device 10 has an effect of acting as a blocking valve even if a separate blocking structure is not provided.

As described above, the valve device according to the present invention provides an effect in which a first fluid and a second fluid, which are incompressible, are precisely proportionally mixed with a very simple structure by a DC motor. In addition, the valve device according to the present invention can be precisely controlled the mixing ratio of the first fluid and the second fluid by rotating the movable body to a constant position by a DC motor, so it has excellent durability and low manufacturing cost. In addition, since the valve device according to the present invention does not include a structure such as a solenoid, it has an advantage of miniaturization.

As described above, the present invention has been described with reference to preferred embodiments, but the present invention is not limited by such examples, and various types of embodiments may be embodied within the scope without departing from the technical spirit of the present invention.

10: proportional control valve device for incompressible fluid mixing
20: DC motor
30: sealing portion
40: reduction gear
50: fixed body
51: through hole
52: movable body receiving portion
54: first inflow euro
56: second inflow euro
58: mixed flow
60: fixed column
70: movable body
71: 1st operation flow path
73: 2nd movable flow path
75: 3rd operation flow path
76: sealing ring receiving groove
78: sealing ring
80: fixing bolt

Claims (4)

A valve device for proportionally mixing a plurality of incompressible fluids made of different temperatures or different materials,
DC motor;
A reduction gear coupled with the rotating shaft of the DC motor to increase torque and reduce rotation speed;
A fixed body installed to be fixed to the DC motor; And
Includes; movable body rotatably installed on the fixed body,
The fixed body is disposed so as to be spaced apart from the first inflow passage along the rotational direction of the movable body, the first inflow passage through which the first fluid flows, the second inflow passage through which the second fluid flows, and the first inflow passage, and It has a mixed flow path disposed opposite the second flow path,
An extension line of the first inflow passage and the second inflow passage is formed to intersect at one point,
The movable body includes a first movable passage corresponding to the first inflow passage, a second movable passage corresponding to the second inflow passage, and a third movable passage corresponding to the mixed passage,
The first movable flow passage and the second movable flow passage join to form a third movable flow passage,
When the center line of the first movable flow path and the center line of the first flow path coincide with each other, the connection between the second movable flow path and the second flow path is completely blocked,
When the center line of the second movable flow passage and the center line of the second flow passage coincide with each other, the connection between the first movable flow passage and the first flow passage is completely blocked,
When the first movable flow passage and the first flow passage are partially communicated, the second movable flow passage and the second flow passage are also partially communicated, and the first movable flow passage and the second movable flow passage are introduced into the first flow passage. The sum of the fluid and the second fluid is always constant,
Proportional for incompressible fluid mixing, characterized in that the third movable passage is always communicated with the mixing passage at a position where the first movable passage or the second movable passage communicates with the first inflow passage or the second inflow passage Control valve device. According to claim 1,
Incompressible fluid mixing, characterized in that the first movable flow path and the second movable flow path are configured to be blocked from the mixing flow path in a position where the first flow path and the second flow path are completely blocked. Proportional control valve device. According to claim 1,
It is disposed between the DC motor and the reduction gear and has a sealing part to prevent the DC motor from being contaminated by moisture.
It has a movable body accommodating portion consisting of a groove in the form of a cylinder closed upward and open downward in the central portion of the fixed body,
The movable body is a cylindrical structure and is accommodated in the movable body accommodating portion and rotatably installed in the fixed body,
A sealing ring accommodating groove formed in the shape of a concave groove along the outer circumferential surface of the movable body is provided,
The sealing ring receiving groove is for mixing the incompressible fluid, characterized in that the sealing ring is coupled to prevent the fluid of the first movable passage, the second movable passage and the third movable passage from leaking out of the fixed body Proportional control valve device. According to claim 3,
The fixed body has a plurality of through holes formed in the direction of the rotation axis of the DC motor,
From the DC motor or the sealing portion, the hollow fixed pillars protruding toward the fixing body parallel to the rotation axis of the DC motor and provided with a female screw portion are provided to correspond to the through hole,
The fixed body is a proportional control valve device for incompressible fluid mixing, characterized in that fixed to the DC motor by a fixing bolt screwed to the fixing column through the through hole.

Images