KR20080107690A - Flow control unit and flow control device having the same - Google Patents

Abstract

Flow rate control unit and flow rate control apparatus including the flow rate control unit are provided to improve the durability of the flow rate control unit since the flow rate is controlled by using the simple structure. Flow rate control unit and flow rate control apparatus including the flow rate control unit comprises an inlet path which is connected to the flow tube or the liquid port so that the fluid is flowed in from the flow tube or the liquid port, an outlet path which is connected to the inlet path so that the fluid be flowed out, a housing in which the respective connected communications path is formed with the inlet path and outlet path in inside, a valve member controlling the flow rate flowed out into the outlet path.

Description

Flow control unit and flow control unit having the flow control unit {Flow control unit and flow control device having the same}

1 is a schematic cross-sectional view of a flow control apparatus according to an embodiment of the present invention.

2 and 3 are cross-sectional views schematically illustrating a state in which a valve member is moved to explain a process in which a flow rate is controlled by using the flow control apparatus shown in FIG. 1.

<Description of the symbols for the main parts of the drawings>

10 ... valve 11 ... valve housing

12 Valve body 13 Solenoid unit

20.Flow control unit 21.Housing

22 Valve element 23 Insert element

24.Elastic member 25.Sealed member

100 ... Flow control unit 111 ... Inlet port

112 Outlet port 113 Valve chamber

131 Cylinder member 132 Fixed core

133 Bobbin 134 Solenoid Coil

135 Plunger 136 Compression coil spring

211 ... inflow path 212 ... communication path

213 Slope 214 Spillway

221 Tip 222 Slope

223 ... School 231 ... Head

232 pillars

The present invention relates to a flow rate control unit and a flow rate control device equipped with the flow rate control unit, and more particularly, is coupled to a flow tube through which the fluid flows to control the flow rate of the fluid or coupled to the flow port of the fluid provided in the valve. A flow control unit for additionally controlling a flow rate of a fluid in addition to a valve, and a flow control device having the flow control unit.

Valves are widely used as a device for controlling the flow rate. The valve is installed in the hollow pipe-shaped flow tube to regulate the flow rate of the fluid flowing through the flow tube. As the valve, various types of valves such as ball valves, throttle valves, and solenoid valves are used.

By the way, the conventional valve used for the purpose of adjusting the flow rate is made of a complicated structure, there is a problem that not only the durability is lowered but also the manufacturing cost increases. In addition, when the flow rate must be finely adjusted, the valve must be more complicated, and the above-mentioned problems are further exacerbated.

The present invention has been made to solve the above problems, the object of the present invention is to improve the structure to be able to finely control the flow rate using a simple structure is easy to manufacture as well as improved flow control unit and durability It is to provide a flow control device provided with a flow control unit.

In order to achieve the above object, the flow control unit according to the present invention is coupled to the flow port of the fluid provided in the flow pipe or the valve flows in the flow control unit for controlling the flow rate of the fluid, the flow pipe or flow An inflow passage communicating with the flow pipe or the flow port so that the fluid flows from the port, an outflow passage communicating with the inflow passage so that the fluid flows out, and a communication passage communicating with the inflow passage and the outflow passage, respectively, are formed therein. housing; And a front end portion inserted into the communication passage so as to be slidable with respect to the housing, the front end portion closing the inflow passage, and interlocked with a distance from a closed position closing the inflow passage of the tip portion to flow out into the outflow passage. And a valve member for controlling.

In addition, the flow control apparatus according to the present invention comprises a valve housing having a fluid flow and a plurality of flow ports for the inflow and outflow of the fluid, and a valve chamber connected to the plurality of flow ports; A valve having a valve body installed in the valve chamber to open and close the flow port; An inflow passage communicating with the flow port so that the fluid flows from the flow port, an outflow passage communicating with the inflow passage so that the fluid flows out, and a communication passage communicating with the inflow passage and the outflow passage, respectively; housing; And a front end portion inserted into the communication passage so as to be slidable with respect to the housing, the front end portion closing the inflow passage, and interlocked with a distance from a closed position closing the inflow passage of the tip portion to flow out into the outflow passage. And a valve member for controlling.

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

1 is a schematic cross-sectional view of a flow control apparatus according to an embodiment of the present invention, Figures 2 and 3 are moved the valve member to explain the process of controlling the flow rate using the flow control device shown in FIG. It is sectional drawing which shows a state schematically.

1 to 3, the flow rate control apparatus 100 of the present embodiment includes a valve 10 and a flow rate control unit 20.

The valve 10 is a device for controlling the flow rate as described in the prior art. The valve 10 may be configured in various ways, such as a ball valve, a throttle valve, and a solenoid valve. In particular, the valve 10 includes the solenoid valve 10. The solenoid valve 10 is widely used as a direction switching valve for changing the flow path of a fluid by applying a current to the solenoid coil to generate an electronic thrust and linearly moving the plunger using this electronic thrust. The solenoid valve 10 includes a valve housing 11, a valve body 12, and a solenoid unit 13.

The valve housing 11 is formed with an inlet port 111 and an outlet port 112 through which fluid flows in and out, respectively. In addition, a valve chamber 113 is formed in the valve housing 11 to communicate with the inflow port 111 and the outflow port 112, respectively.

The valve body 12 is provided in the valve chamber 113 so that linear movement is possible. The valve body 12 opens and closes the outlet port 112 by linear movement of the valve body 12 to interrupt the flow of fluid from the inlet port 111 to the outlet port 112.

The solenoid unit 13 includes a hollow cylinder member 131, a fixed iron core 132 fixed to an end of the cylinder member 131, a bobbin 133 into which the cylinder member 131 is inserted, and a bobbin 133. ) And the solenoid coil 134, which is excited by a current applied from the outside and generates electronic thrust, is inserted into the cylinder member 131 so as to reciprocate linearly and pinned to the valve body 12. Plunger 135 is provided. The plunger 135 is elastically biased in the direction in which the valve body 12 closes the outlet port 112 by the compression coil spring 136.

In the state in which no current is applied to the solenoid coil 134, the outlet port 112 is closed as shown in phantom in FIG. 1 to block the flow of fluid. Then, when a current is applied to the solenoid coil 134, the plunger 135 is pulled toward the fixed iron core 132 by the electronic thrust to move the valve body 12, it is shown in solid lines in Figures 1 to 3 As shown, the outlet port 112 is opened to allow fluid to flow to the outlet port 112.

The flow control unit 20 is coupled to the flow port of the fluid provided in the flow pipe or valve through which the fluid flows to control the flow rate of the fluid. In particular, in this embodiment, the flow control oil knit 20 is finely adjusted to the flow rate is coupled to the outlet port 112 of the solenoid valve (10).

The flow control unit 20 includes a housing 21, a valve member 22, an insertion member 23, and an elastic member 24.

The housing 21 is coupled to the valve housing 11 of the solenoid valve. In particular, although not shown in the present embodiment, an O-ring (not shown) is interposed between the housing 21 and the valve housing 11 to prevent fluid from leaking between the housing 21 and the valve housing 11. become. The inflow path 211, the communication path 212, and the outflow path 214 are formed inside the housing 21.

The inflow passage 211 is in communication with the outlet port 112. Accordingly, the fluid is introduced into the housing 21 through the inlet passage 211 from the outlet port 112.

The communication path 212 is formed long in the housing 21. A female thread is formed on the inner circumferential surface of the communication path 212. The communication path 212 is in communication with the inflow path 211. The communication path 212 is disposed coaxially with the inflow path 211. And, one side of the communication path 212 is provided with an inclined portion 214 formed to be inclined in the direction intersecting with the longitudinal direction of the communication path (212).

The outflow path 214 is in communication with the communication path 212. Accordingly, the fluid introduced into the inflow path 211 may flow out of the housing 21 through the outflow path 214 via the communication path 212. The outlet passage 214 is formed such that the central axis of the outlet passage 214 is perpendicular to the central axis of the inlet passage 211.

The valve member 22 is inserted into the communication path 212 and slidable with respect to the housing 21. In particular, in the present embodiment, the male screw thread that is screwed with the female thread of the communication path 212 is formed on the outer circumferential surface of the valve member 22, so that the valve member 22 slides as the valve member 22 is rotated. . In addition, a sealing member 25 such as an O-ring is interposed between the valve member 22 and the communication path 212, so that the fluid introduced through the inflow path 211 passes through the communication path 212 and flows out. It is discharged to the outside of the housing 21 through the (214). That is, the fluid is not discharged to the outside through the communication path 212. The tip 221 is formed in the valve member 22.

The front end portion 221 is linked to the sliding of the valve member 22 to close or open the inflow path 211. That is, the front end portion 221 closes the inflow path 211 in the closed position shown in FIG. 1, so that the fluid 211 flows into the inflow path 211 and flows out through the outflow path 214. To prevent them. The front end portion 221 is formed with an inclined surface 222 formed to be inclined in a direction crossing with the sliding direction of the valve member 22. The inclined surface 222 is formed complementarily with the inclined portion 213, so that the inclined surface 222 is in close contact with the inclined portion 213 in the closed position. Therefore, when the valve member 22 moves to the right from the closed position, a space is formed between the inclined portion 213 and the inclined surface 222, and fluid flows into the space between the inclined portion 213 and the inclined surface 222. Will be. In addition, the fluid introduced into the space between the inclined portion 213 and the inclined surface 222 flows into a fine gap between the male thread of the valve member 22 and the female thread of the communication path 212, and then the outlet passage 214. Outflow through the housing 21 through. 1 and 3 indicate the flow direction of the fluid.

On the other hand, in the present embodiment, the flow rate of the valve member 22 sliding, that is, the flow rate flowing through the outlet passage 214 in conjunction with the distance that the front end 221 is moved to the right from the closed position is controlled, which is as follows. This is due to two structures.

First, the outflow flow rate is controlled in conjunction with the threaded length between the female and male threads. That is, when the valve member 22 moves from the closed position to the right to increase the moving distance, the length of screwing between the female screw and the male screw decreases, so that the valve member 22 moves to the outlet passage 214 through a fine gap between the female screw and the male screw. The incoming flow rate is increased. For example, comparing FIGS. 2 and 3, in the state shown in FIG. 3, since the screwing length is smaller than that shown in FIG. 2, the outflow rate is increased.

Next, when the valve member 22 moves from the closed position to the position shown in FIG. 2 as shown in FIG. 1, the space between the inclined surface 222 and the inclined portion 213 gradually increases. The volume of the fluid flowing into the outlet passage 214 through the communication passage 212 is increased.

And the recessed part 223 is formed in the valve member 22. As shown in FIG. The concave portion 223 is formed concave from the distal end surface of the distal end portion 221 in the direction in which the distal end portion 221 opens the inflow path. The concave portion 223 is formed long in the sliding direction of the valve member 22.

The insertion member 23 is inserted into the recess 223 of the valve member. The insertion member 23 is formed to have a head portion 231 formed to have a diameter similar to the inner circumferential surface diameter of the concave portion 223, and a diameter smaller than the diameter of the head portion 231 and from the head portion 231. It has a protruding pillar portion 232.

The elastic member 24 elastically biases the tip portion 221 of the valve member in the sliding direction of the valve member 22. In particular, in the present embodiment, since the elastic member 24 elastically biases the insertion member 23 in the direction in which the recess 23 is inserted into the recess 223, the front end portion 221 of the valve member opens in the inflow path 211. It becomes elastic bias. Here, the elastic member 24 is a compression coil spring 24 having one end supported by the head 231 of the insertion member and the other end supported by the inner surface of the communication path 212, and the compressed coil spring 24. ) Is inserted into the pillar portion 232 of the insertion member. The compression coil spring 24 is inserted into the recess 223 so as not to contact the inner surface of the recess 223.

In the flow control device 100 configured as described above, the fluid flows into or out of the flow control unit 20 depending on whether the valve 10 is operated. In addition, in the fluid inflow state of the flow control unit 20, it is possible to finely control the flow rate flowing out through the outlet passage 214 in conjunction with the position of the valve member 22. That is, when the valve member 22 is located in the closed position shown in Fig. 1, the outflow of the fluid is blocked. Then, when the valve member 22 moves to the right from the closed position, the outflow flow rate increases in proportion to the moving distance of the valve member 22. This is because the coupling length between the male screw of the valve member 22 and the female screw of the communication path 212 is reduced in proportion to the moving distance of the valve member 22.

In addition, in the present embodiment, the valve member 22 is elastically biased in the opening direction of the inflow path 211 by the elastic member 24, so that the fluid flows out through the outflow path 214 so that the pressure of the fluid is reduced. When applied to (22) it is possible to prevent the valve member 22 to move finely. Therefore, the position of the valve member 22 is fixed so that the fluid can flow out in a certain amount even if time passes.

In this embodiment, the compression coil spring 24 is configured to be supported by the head 231 of the insertion member so that the valve member 22 and the insertion member 23 are relative to each other when the valve member 22 is rotated. Will rotate. As such, when the valve member 22 and the insertion member 23 rotate relative to each other, the compression coil spring 24 that presses the insertion member 23 also rotates relative to the valve member 22, thereby compressing the coil coil spring ( 24) increases durability. Because, unlike the present embodiment, when the compression coil spring 24 is configured to rotate together when the valve member 22 rotates, one end of the compression coil spring 24 when the valve member 22 rotates is a recess of the valve member. Since the inner surface of the concave portion 223 is damaged by being caught by the inner surface, and the one end and the other end of the compression coil spring 24 are rotated relative to each other, the compression coil spring 24 is twisted, so that the compression coil spring 24 This is because the service life of) decreases.

As described above, in the present embodiment, after the flow control unit 20 is coupled to the valve 10, the flow rate can be finely and precisely adjusted by simply rotating the valve member 22. In particular, the valve 10 serves to supply or shut off the fluid, the flow rate is configured to be finely adjusted by the rotation of the valve member 22, has the advantage that the flow control structure is very simple compared to the prior art . In addition, the simple structure can reduce the production cost and further improve the durability.

As mentioned above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the technical idea of the present invention. It is obvious.

For example, in this embodiment, the solenoid valve is configured to be provided, but is not limited to the solenoid valve and may be configured to include various valves such as a valve for blocking or supplying a fluid or a valve for adjusting the flow rate.

In addition, in the present embodiment is configured to be provided with a valve, the flow rate control unit is installed in the pipe-shaped flow pipe in which the fluid flows without the valve may be configured to control the flow rate.

According to the present invention of the above configuration, it is possible to finely control the flow rate using a simple structure, not only easy to manufacture but also improved durability.

Claims (9)

In the flow control unit for controlling the flow rate of the fluid coupled to the flow port of the fluid provided in the flow pipe or valve flows, An inflow passage communicating with the flow tube or the flow port so that the fluid flows from the flow tube or the flow port, an outflow passage communicating with the inflow passage so that the fluid flows out, and a communication passage communicating with the inflow passage and the outflow passage, respectively A housing formed therein; And The flow path is inserted into the communication path so as to be slidable to the housing, and has a tip portion for closing the inflow path, and controls a flow rate flowing into the outflow path in association with a distance from a closed position for closing the inflow path of the tip portion. And a valve member for controlling the flow rate. The method of claim 1, And an inclined surface formed inclined in a direction intersecting the sliding direction of the valve member at the front end of the valve member. The method of claim 1, An internal thread is formed on the inner circumferential surface of the communication path, And a male screw thread screwed to the female screw thread on an outer circumferential surface of the valve member. The method of claim 1, And an elastic member coupled to the housing such that the front end portion of the valve member is elastically biased in the sliding direction of the valve member. The method of claim 4, wherein The valve member is provided with a concave portion formed concavely in the direction in which the tip portion opens the inflow passage from the tip surface of the valve member, And an insertion member inserted into the recess of the valve member and elastically biased in the direction of insertion into the recess by the elastic member. A valve housing having a fluid flowable and having a plurality of flow ports for inflow and outflow of the fluid, and a valve chamber connected to the plurality of flow ports; A valve having a valve body installed in the valve chamber to open and close the flow port; An inflow passage communicating with the flow port so that the fluid flows from the flow port, an outflow passage communicating with the inflow passage so that the fluid flows out, and a communication passage communicating with the inflow passage and the outflow passage, respectively; housing; And The flow path is inserted into the communication path so as to be slidable to the housing, and has a tip portion for closing the inflow path, and controls a flow rate flowing into the outflow path in association with a distance from a closed position for closing the inflow path of the tip portion. And a valve member for controlling the flow rate. The method of claim 6, An internal thread is formed on the inner circumferential surface of the communication path, And a male screw thread screwed to the female screw thread on an outer circumferential surface of the valve member. The method of claim 6, The valve member further comprises an elastic member coupled to the housing so that the front end portion is elastically biased in the sliding direction of the valve member. The method of claim 8, The valve member is provided with a concave portion formed concavely in the direction in which the tip portion opens the inflow passage from the tip surface of the valve member, And an insertion member inserted into the recess of the valve member and elastically biased in the direction inserted into the recess by the elastic member.

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