KR102649552B1 - Flow control valve - Google Patents

Abstract

The purpose of the present invention is to provide a flow control valve that can automatically control the flow rate by detecting the fluid pressure before and after the valve and measuring the flow rate. The flow control valve comprises: a valve body (100) having a valve seat (110), an inlet (120), and an outlet (130); a valve stem (200) installed penetrating the upper part of the valve body (100) so as to be positioned above the valve seat (110); an opening (300) coupled to the lower part of the valve stem (200); a driving unit (400) that causes the opening (300) to move up and down toward the valve seat (110); a first pressure sensor (500) that measures the pressure of the fluid flowing into the valve body (100); a second pressure sensor (600) that measures the pressure of the fluid discharged from the valve body (100); and a control unit that controls the opening degree of the valve by operating the driving unit (400) according to the measurement values of the first pressure sensor (500) and the second pressure sensor (600).

Description

Flow control valve

The present invention relates to a flow control valve, and in particular, to a flow control valve capable of automatically controlling the flow rate by detecting the fluid pressure before and after the valve.

Patent Document 001 discloses a housing having an inlet through which fluid flows in and an outlet through which fluid flows out, and a partition wall with a first flow hole formed therein, a first valve unit that opens and closes the first flow hole, and the first flow. A flow control valve including a second valve unit that controls the flow rate flowing through the hole is presented.

Patent Document 002 constitutes a valve seat with an inlet and an outlet on both sides, with a fluid passage connecting the inlet and the outlet in the middle, and an upper part of the valve seat formed to communicate with the fluid passage through a communication hole. A valve body comprising an installation port; An opening/closing operation unit consisting of a center pin disposed at the center of the installation port to enable elevation, and an opening/closing portion coupled to a lower portion of the center pin to open/close a fluid passage; a support ring seated on the bottom of the installation port and dividing the installation port and the fluid passage; A body is formed with male threads on the outer circumferential surface and screwed to the inner circumferential surface of the installation tool, and has a plurality of fastening grooves formed at equal intervals on the upper part, a moving space formed on the upper side with a step formed on the inner circumferential surface of the body as a boundary, and a lower side. A housing formed with a female thread and an O-ring coupling hole formed at a lower portion of the female thread into which an O-ring is inserted; A fastening part screwed to the female screw of the housing, an adjustment handle formed integrally with the upper part of the fastening part so as to protrude upward from the housing to control the screw connection of the fastening part and having an indicator formed on the upper surface, and a space between the fastening part and the adjustment handle. A gauge composed of a ring-shaped protruding protrusion located in the outward direction; It consists of a limiting ring that is seated on the upper surface of the body by forming a coupling hole corresponding to the fastening groove of the body formed in the housing, and a fixing bolt that is fastened to the fastening groove through the coupling hole and secures the limiting ring to the upper surface of the body. , a stopper that limits the elevation height of the gauge according to the screw connection between the housing and the fastening part; A dial attached to a limiting ring configured in the stopper; A control means comprising a snap ring coupled to the center pin of the opening/closing operation unit and located inside the gauge, and an elastic body inserted into the outer diameter of the center pin and disposed between the housing and the snap ring to adhere the snap ring to the gauge. It is possible to control the opening and closing amount of the fluid passage of the valve seat through direct manipulation of the opening and closing operation part using an actuator or indirect manipulation of the opening and closing operation part using a gauge, and the lifting height of the height-adjusted gauge is limited to prevent the gauge from being attached or detached. A flow control valve is proposed, which is characterized in that it can prevent.

Patent Document 003 includes a driving part that generates a driving force, a needle shaft with one end connected to the driving part to receive the driving force from the driving part and move in a straight line, and the needle shaft being coupled to the driving part and guiding the linear movement of the needle shaft. An operating assembly including a needle nut having a penetrating hollow, and a valve disk coupled to the other end of the needle shaft; A body coupled to the operating assembly and having a valve opening therein that is selectively opened and closed as the valve disc inserted into the interior through which water flows moves linearly; and a clip for fixing the body and the operation assembly so that the body and the operation assembly do not separate from each other.

Patent Document 004 discloses a first flow path portion that guides the incoming fluid in one direction, a second flow path portion that communicates with the first flow path portion and is formed in a direction perpendicular to the first flow path portion, and the second flow path portion at an end of the second flow path portion. A flow path portion including a third flow path portion extending in a horizontal direction opposite to the first flow path portion to form an outflow direction of the fluid; And a solenoid disposed along the second flow path portion, moves up and down and comes into contact with an end of the second flow path portion according to the inflow state of the fluid, thereby restricting the inflow of the fluid and moving the poppet. , It is formed in a long sphere shape with a first width and a third width different from the second width on the upper and lower sides around a second width located in the center, and at the end of the third width, the end of the third width is formed. It includes a fourth width extending downward and narrower, wherein the poppet includes a moving body that moves along the axial direction of the second flow path portion by forming a gap of a predetermined distance with the inner peripheral surface of the second width, and the moving body of the moving body. A blocking portion formed in a tapered shape that extends in the horizontal direction wider than the width of the outlet of the second flow path portion at the end, and narrows downward from the end of the expanded area to a predetermined area than the width of the outlet of the second flow path portion; It is provided with a vortex prevention part that extends downward from the bottom of the blocking part to prevent a vortex of inflow fluid, and the end of the vortex prevention part extends further along the fourth width, and the fourth width is provided at the end of the extended vortex prevention part. 3 It further includes a fluid stabilizing part that is formed in a tapered shape at the starting point of the flow path to stabilize the inflow fluid, wherein the blocking part, when the tapered outer peripheral surface comes into contact with the width of the outlet of the second flow path, causes the fluid to flow. A flow control valve for fluid supply is proposed, which is characterized by blocking movement.

KR 10-2062825 B1 (registration date December 30, 2019) KR 10-1972317 B1 (registration date April 19, 2019) KR 10-2021-0086462 A (Publication date July 8, 2021) KR 10-2274726 B1 (registration date July 2, 2021)

The purpose of the present invention is to provide a flow control valve that can automatically adjust the flow rate by detecting the fluid pressure before and after the valve.

In order to solve the above problems, the flow control valve according to an embodiment of the present invention includes a valve seat formed inside to be open up and down, an inlet formed to be connected to the valve seat on one side, and connected to the valve seat on the other side. A valve body having an outlet; a valve stem installed through the upper part of the valve body so as to be disposed on an upper side of the valve seat; An opening and closing port coupled to the bottom of the valve stem; A driving unit coupled to the upper end of the valve stem and operating the valve stem to raise and lower the opening and closing port toward the valve seat; A first pressure sensor connected to the inlet side of the valve body to measure the pressure of fluid flowing into the valve body; a second pressure sensor connected to the outlet side of the valve body to measure the pressure of fluid discharged from the valve body; and a control unit connected to the driving unit, the first pressure sensor, and the second pressure sensor, and controlling the opening degree of the valve by operating the driving unit according to measured values of the first pressure sensor and the second pressure sensor.

In the flow control valve of the present invention, a lower male thread is formed at the lower end of the valve stem, a female thread fastened to the lower male thread of the valve stem is formed at the center of the opening/closing port, and the opening/closing port is moved up and down inside the valve body. An inner guide is installed that is inserted to penetrate and guide the lifting operation of the opening and closing opening, and the driving unit rotates the valve stem to cause the opening and closing opening to move up and down.

In the flow control valve of the present invention, an outer guide is installed inside the valve body to surround the outer periphery of the opening and closing opening and guide the lifting and lowering operation of the opening and closing opening.

In the flow control valve of the present invention, a stopper is formed at the lower part of the opening/closing opening, which protrudes along the outer periphery of the opening/closing opening, and contacts the lower surface of the outer guide when the opening/closing opening rises to limit the rising section of the opening/closing opening.

In the flow control valve of the present invention, a rounded portion extending along the outer lower edge of the opening and closing port is formed at the bottom of the opening and closing port, and an inclined portion having an upper-gwang-lower-shaped shape connecting the upper end of the rounding portion and the lower end of the stopper is formed.

In the flow control valve of the present invention, an upper male screw is formed on the upper part of the valve stem, an indicator nut that is raised and lowered along the upper male screw by rotation of the valve stem is fastened to the upper male screw of the valve stem, and the valve body An opening is formed at the top so that the upper and lower positions of the indicator nut can be confirmed.

According to the present invention, the driving part operates according to the measured values of the first pressure sensor and the second pressure sensor to adjust the opening degree of the valve, thereby detecting the pressure of the fluid acting on the front and rear ends of the valve, respectively, measuring the flow rate, and automatically There is an effect that can be adjusted.

1 is a front cross-sectional view of a flow control valve according to an embodiment of the present invention.
Figure 2 is a side view of a flow control valve according to an embodiment of the present invention.
Figure 3 is a plan cross-sectional view of a flow control valve according to an embodiment of the present invention.
Figure 4 is an enlarged view of the opening and closing portion in Figure 1.
Figure 5 is an enlarged view of the indicator nut portion in Figure 2.
Figure 6 is a front cross-sectional view of a flow control valve according to another embodiment of the present invention.
Figure 7 is a perspective view of the laminarization member shown in Figure 6.

Hereinafter, the most preferred embodiments of the present invention will be described in detail in order to enable those skilled in the art to easily practice the present invention.

Numbers cited in the examples below are not limited to the objects of citation and can be applied to all examples. An object that has the same purpose and effect as the configuration presented in the examples is an equivalent replacement object. The high-level concept presented in the examples includes low-level concept objects that are not described.

[Example 1-1] As shown in FIGS. 1 to 3, the flow control valve of the present invention has a valve seat 110 formed to be open up and down inside, and an inlet formed on one side to be connected to the valve seat 110. (120), and a valve body (100) having an outlet (130) formed on the other side to be connected to the valve seat (110); A valve stem 200 installed through the upper part of the valve body 100 to be disposed on the upper side of the valve seat 110; An opening/closing port (300) coupled to the lower end of the valve stem (200); A driving unit 400 that is coupled to the upper end of the valve stem 200 and operates the valve stem 200 to lift and lower the opening and closing port 300 toward the valve seat 110; A first pressure sensor 500 connected to the inlet 120 of the valve body 100 and measuring the pressure of fluid flowing into the valve body 100; A second pressure sensor 600 connected to the outlet 130 of the valve body 100 and measuring the pressure of the fluid discharged from the valve body 100; And it is connected to the driving unit 400, the first pressure sensor 500, and the second pressure sensor 600, and the driving unit ( It includes a control unit (not shown) that controls the opening degree of the valve by operating 400).

The valve body 100 is formed to accommodate the valve stem 200 and the opening/closing port 300.

The valve stem 200 is shaped like a long rod extending up and down, and is inserted into the valve body 100 so that its upper end protrudes upward from the valve body 100.

The driving unit 400 is installed on the upper side of the valve body 100. The driving unit 400 is connected to the upper end of the valve stem 200 protruding upward from the valve body 100 and provides driving force for the valve stem 200 to raise and lower the opening and closing port 300.

The opening/closing port 300 is moved up and down by the operation of the valve stem 200 by the driving unit 400. Accordingly, the opening/closing port 300 is spaced apart from the valve seat 110 during the upward operation and approaches the valve seat 110 during the downward operation, thereby controlling the opening degree of the valve.

As shown, the first pressure sensor 500 and the second pressure sensor 600 are connected to the inlet 120 of the valve body 100 by piping accessories such as an elbow mounted on the side of the valve body 100. ) or may be connected to the outlet 130. Additionally, if necessary, the first pressure sensor 500 and the second pressure sensor 600 may be installed in a structure where each end is directly inserted into the inlet 120 or the outlet 130.

The control unit is the driving unit ( By operating 400), the opening degree of the valve is adjusted so that the fluid passes through the valve only at a preset flow rate. The control unit may be built into the control box 1100 mounted on the upper part of the valve body 100.

[Example 2-1] In the flow control valve of the present invention in Example 1-1, as shown in Figures 1 and 4, a lower male screw 210 is formed at the lower end of the valve stem 200, At the center of the opening/closing port 300, a female screw 310 is formed that is fastened to the lower male screw 210 of the valve stem 200, and inside the valve body 100 is formed to penetrate the opening/closing port 300 vertically. An inner guide 700 is inserted and installed to guide the lifting operation of the opening/closing port 300, and the driving unit 400 rotates the valve stem 200 to cause the opening/closing port 300 to move up and down.

The inner guide 700 is formed in the shape of a bar extending up and down and supports the inside of the opening/closing opening 300 so as to be able to slide up and down. It is preferable that two or more inner guides 700 are provided so that the opening and closing opening 300 can be raised and lowered in a stable manner.

The driving unit 400 includes a motor and a plurality of gears connecting the motor and the upper end of the valve stem 200 to rotate the valve stem 200 forward and backward.

Ultimately, the opening/closing port 300 moves up and down along the lower male screw 210 when the valve stem 200 rotates forward or backward.

[Example 3-1] In Example 2-1, the flow control valve of the present invention has an outer periphery of the opening/closing port 300 inside the valve body 100, as shown in FIGS. 1 and 4. An outer guide 800 is installed to guide the lifting and lowering operation of the opening and closing opening 300.

The outer guide 800 has a cylindrical shape extending up and down and supports the outer periphery of the opening/closing opening 300 so as to slide up and down, allowing the opening/closing opening 300 to move up and down stably.

[Example 4-1] In Example 3-1, the flow control valve of the present invention, as shown in FIG. 4, has an opening and closing port ( When the 300) is raised, a stopper 320 is formed that contacts the lower surface of the outer guide 800 and limits the rising section of the opening and closing opening 300.

The stopper 320 prevents the upper surface of the opening/closing opening 300 from coming into close contact with the upper inner wall of the valve body 100 when the opening/closing opening 300 rises, so that the female thread 310 of the opening/closing opening 300 is connected to the valve stem ( This prevents excessive tightening of the lower male screw 210 of 200).

[Example 5-1] In the flow control valve of the present invention in Example 4-1, as shown in FIG. 4, the bottom of the opening/closing port 300 has a rounding extending along the outer lower edge of the opening/closing port 300. A portion 330 and an inclined portion 340 connecting the upper end of the rounded portion 330 and the lower end of the stopper 320 are formed.

The rounding portion 330 and the inclined portion 340 make the bottom of the opening/closing opening 300 wide at the top and narrow at the bottom, so that when the opening/closing opening 300 is placed close to the valve seat 110, the fluid flow It allows the valve to easily escape between the opening/closing port 300 and the valve seat 110.

[Example 6-1] In the flow control valve of the present invention in Example 2-1, as shown in Figures 1 and 5, an upper male screw 220 is formed on the upper part of the valve stem 200, An indicator nut 900 is fastened to the upper male screw 220 of the valve stem 200 and moves up and down along the upper male screw 220 by rotation of the valve stem 200, and at the upper end of the valve body 100. An opening 140 is formed so that the upper and lower positions of the display nut 900 can be confirmed.

The opening 140 is formed to extend vertically to correspond to the section where the upper male screw 220 of the valve stem 200 is formed.

The indicator nut 900 is supported inside the upper end of the valve body 100 to prevent rotation, but is supported to slide up and down. Accordingly, the indicator nut 900 moves up and down along the upper male screw 220 when the valve stem 200 rotates forward or reverse. Ultimately, the indicator nut 900 moves up and down together with the opening/closing port 300 when the valve stem 200 rotates, and thus the user can determine the position of the indicator nut 900 through the opening 140. The opening degree of the valve can be confirmed by observation.

[Example 6-2] In Example 6-1, the flow control valve of the present invention has an indicator pin 910 inserted into the opening 140 on the outer peripheral surface of the indicator nut 900, as shown in FIG. 5. ) is formed protrudingly.

The indicator nut 900 may be installed inside the upper end of the valve body 100 to prevent rotation but to be able to slide up and down as the indicator pin 910 is inserted into the opening 140.

And the user can easily observe the position of the indicator nut 900 as the indicator pin 910 is exposed to the outside through the opening 140.

[Example 7-1] In Example 1-1, the flow control valve of the present invention is mounted on the outlet 130 of the valve body 100 as shown in FIGS. 6 and 7 to control the valve body 100. ) further includes a laminarization member 1000 that laminarizes the flow of fluid discharged from the.

The laminarization member 1000 divides the outlet 130 of the valve body 100 into two or more spaces to laminarize the flow of fluid passing through the outlet 130, thereby preventing eddy flow of the fluid. The fluid pressure at the outlet 130 can be accurately measured through the second pressure sensor 600.

[Example 7-2] In the flow control valve of the present invention in Example 7-1, the laminar flow member 1000 includes a cylindrical edge portion 1010 inserted into the inner wall of the outlet 130, and It includes a partition 1020 formed inside the edge portion 1010 to divide the outlet 130 into two or more spaces.

At this time, the end of the second pressure sensor 600 or the end of the piping accessory for connecting the second pressure sensor 600 to the outlet 130 penetrates the edge portion 1010 and connects the laminarization member 1000. is placed on the inner side of

The partition walls 1020 may be configured to divide the outlet 130 into multiple layers by providing two or more partitions 1020 arranged in parallel with each other.

According to the above configuration, the laminar flow member 1000 can be easily formed by separately manufacturing the laminar flow member 1000 and then inserting and mounting it into the outlet 130 of the valve body 100.

[Example 7-3] In the flow control valve of the present invention in Example 7-2, the laminar flow member 1000 is made of a polymer material, preferably of Teflon.

The Teflon material allows the laminar flow member 1000 to have excellent corrosion resistance, and also has low surface roughness and friction coefficient, allowing fluid to smoothly pass through the laminar flow member 1000. In addition, since it is manufactured by injection molding, the production cost is low.

[Example 7-4] In the flow control valve of the present invention in Example 7-2, the end of the partition wall 1020 is formed to be round.

That is, the partition wall 1020 is configured to minimize fluid resistance by forming a rounded side that faces the flow of fluid. At this time, in order to minimize fluid resistance due to the edge portion 1010, the inner peripheral end of the edge portion 1010 may also be formed to be round.

[Example 7-5] In the flow control valve of the present invention in Example 7-2, a locking groove 150 is formed at the outlet 130 of the valve body 100, and the laminar flow member 1000 A locking protrusion 1030 that is inserted into the locking groove 150 is formed on the edge portion 1010 of .

The locking groove 150 and the locking protrusion 1030 enable the laminar flow member 1000 to be firmly mounted at the correct position when the laminar flow member 1000 is mounted on the valve body 100.

100: valve body 110: valve seat
120: inlet 130: outlet
140: opening 150: catching groove
200: valve stem 210: lower male screw
220: upper male screw 300: opening/closing port
310: female thread 320: stopper
330: rounding part 340: inclined part
400: Drive unit 500: First pressure sensor
600: Second pressure sensor 700: Inner guide
800: Outer guide 900: Indicator nut
910: Indicator pin 1000: Laminar flow member
1010: Edge portion 1020: Bulkhead
1030: Obstacle 1100: Control box

Claims (6)

A valve body having a valve seat 110 formed to be open up and down inside, an inlet 120 formed to be connected to the valve seat 110 on one side, and an outlet 130 formed to be connected to the valve seat 110 on the other side. (100);
A valve stem 200 installed through the upper part of the valve body 100 to be disposed on the upper side of the valve seat 110;
An opening/closing port (300) coupled to the lower end of the valve stem (200);
A driving unit 400 that is coupled to the upper end of the valve stem 200 and operates the valve stem 200 to lift and lower the opening and closing port 300 toward the valve seat 110;
A first pressure sensor 500 connected to the inlet 120 of the valve body 100 and measuring the pressure of fluid flowing into the valve body 100;
A second pressure sensor 600 connected to the outlet 130 of the valve body 100 and measuring the pressure of the fluid discharged from the valve body 100; and
It is connected to the driving unit 400, the first pressure sensor 500, and the second pressure sensor 600, and the driving unit 400 according to the measured values of the first pressure sensor 500 and the second pressure sensor 600. ) includes a control unit that controls the opening degree of the valve by operating,
A lower male screw 210 is formed at the bottom of the valve stem 200,
A female screw 310 is formed at the center of the opening/closing opening 300, which is fastened to the lower male screw 210 of the valve stem 200,
An inner guide 700 is installed inside the valve body 100, which is inserted to penetrate the opening/closing opening 300 vertically and guides the lifting/lowering operation of the opening/closing opening 300,
The driving unit 400 includes causing the opening/closing port 300 to move up and down by rotating the valve stem 200,
An outer guide 800 is installed inside the valve body 100 to surround the outer periphery of the opening/closing opening 300 and guide the lifting/lowering movement of the opening/closing opening 300,
An upper male screw 220 is formed on the upper part of the valve stem 200,
An indicator nut 900 that moves up and down along the upper male screw 220 by rotation of the valve stem 200 is fastened to the upper male screw 220 of the valve stem 200,
An opening 140 is formed at the top of the valve body 100 to confirm the vertical position of the indicator nut 900,
An indicator pin 910 inserted into the opening 140 protrudes from the outer peripheral surface of the indicator nut 900,
The indicator nut 900 is installed to slide up and down so that the indicator pin 910 is inserted into the opening 140 to prevent rotation inside the upper end of the valve body 100,
It includes a laminarizing member 1000 that is mounted on the outlet 130 of the valve body 100 to laminarize the flow of fluid discharged from the valve body 100,
The laminarization member 1000 is made of Teflon material,
The laminarization member 1000 includes a cylindrical edge portion 1010 inserted into the inner wall of the outlet 130 and is formed in plural pieces parallel to each other on the inside of the edge portion 1010 to form a plurality of the outlet 130. It includes a partition wall (1020) dividing it into layers,
The inner peripheral end of the edge portion 1010 and the end of the partition wall 1020 are rounded,
A locking groove 150 is formed at the outlet 130 of the valve body 100, and a locking protrusion 1030 inserted into the locking groove 150 is formed on the edge portion 1010 of the laminar flow member 1000. is formed,
At the lower part of the opening/closing opening 300, a stopper 320 protrudes along the outer periphery of the opening/closing opening 300 and contacts the lower surface of the outer guide 800 when the opening/closing opening 300 rises to limit the rising section of the opening/closing opening 300. ) is formed,
At the bottom of the opening/closing opening 300, there is a rounded portion 330 extending along the outer lower edge of the opening/closing opening 300, and an inclined portion 340 connecting the upper end of the rounding portion 330 and the lower end of the stopper 320. ) Flow control valve including the formation of.
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