KR20150065089A - Valve for Flow Control - Google Patents

Abstract

According to an embodiment of the present invention, the present invention relates to a valve for flow control and, more specifically, to a valve for flow control, which is opened and closed to block the flow of a fluid moving through a pipe. According to an embodiment, the valve for flow control has a damping structure wherein an impact generated when a needle is moved inside a valve body is absorbed, thereby reducing noise when opening and closing the valve.

Description

[0002] Valve for Flow Control [

An embodiment of the present invention relates to a flow control valve. And more particularly, to a flow control valve that opens and closes to block the flow of fluid moving through a piping.

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

Generally, a fuel supply device of a vehicle may be configured to include a fuel tank, a fuel rail, and a fuel pump. The fuel rail stores the high-pressure fuel and distributes the stored high-pressure fuel to each injector. That is, the fuel rail is provided with a plurality of injectors, and each injector is connected to the cylinder head or the intake manifold to inject fuel into the combustion chamber or the port. The fuel rail is connected to the fuel tank and receives fuel from the fuel tank. A high-pressure pump is installed between the fuel rail and the fuel tank, and the high-pressure pump compresses the fuel from the fuel tank to a high pressure and transfers the fuel to the fuel rail.

In the high-pressure pump, a flow control valve may be provided. As an example of the flow control valve, there is a solenoid valve.

The solenoid valve is installed in the middle of the flow path through which the fuel flows. The solenoid valve allows the fluid in the flow path to temporarily flow as needed in the state in which the flow of the fuel is blocked, selectively supplies the fluid to the one side, As shown in FIG.

In the conventional solenoid valve, electricity is applied to a coil in the main body, and the electromagnet of one side generates a magnetic force. The magnetic force acts on the armature supported by the return spring to strongly pull the armature toward one side, And the flow path of the fluid is cut off for a certain period of time while the electric current is flowing. The electric power applied to the coil is cut off after a predetermined time, As the amateur pulled by the loss is pushed back to the other side by the elastic force of the return spring, the closing means of the other side of the armature opens the closed channel.

However, in the conventional solenoid valve having the above-described configuration, the armature is actuated by the electromagnetic force and the elastic force of the return spring. When the power is applied, the armature is strongly pulled instantaneously due to strong electromagnetic force, The electromagnetic force is released and the electromagnetic force is also strongly bounced out by the elastic force of the return spring, thereby opening the flow path. Therefore, there is a problem that the operation noise is generated due to the blowing every time.

Such operating noise may not only be uncomfortable to the user but also cause noise pollution in areas requiring quietness, complaints in the case of being used in a vehicle, and a factor that shortens the service life of the flow control valve As shown in FIG.

In order to solve the above-described problems, one embodiment of the present invention provides a valve control apparatus for a valve control apparatus, which includes a valve body having a damping structure inside a valve body to absorb noise generated when a needle moves inside a valve body, Lt; / RTI >

The technical object of the present invention is not limited to the above-mentioned technical objects and other technical objects which are not mentioned can be clearly understood by those skilled in the art from the following description will be.

The flow control valve according to an embodiment of the present invention may include a valve body having a supply hole through which fluid is supplied and a control chamber provided with the fluid to flow out at a controlled pressure.

The needle may include a needle that is movably installed in the valve body and has a stopper formed around the valve body so that movement in the first direction is restricted.

The valve plate may include a valve plate disposed inside the control chamber, movable along with the needle, and a valve plate for opening and closing a fluid passage between the control chamber and the supply hole.

It may also include an armature attached to the needle to move the needle.

The valve body may include a pole core connected to one side of the valve body.

And a first elastic means provided inside the pole core to move the needle in the first direction.

The cap may include a stopper inserted into one side of the control chamber and having at least one outlet hole, the stopper interacting with the valve plate to buffer an impact generated when the needle moves.

The valve body may comprise a plurality of pieces.

A guide for guiding the needle may be formed in the valve body so as to smoothly move the needle.

A groove may be formed on one surface of the stopper to provide a vortex to the fluid.

A protrusion is formed on one surface of the valve plate, and the valve seat may be formed such that the protrusion is inserted into the valve.

The protrusion, the valve seat, and the needle may be coaxially disposed.

The inner surface of the valve seat and the outer surface of the protruding portion can correspond to each other in shape.

The valve seat may include a sleeve shape, and the protrusion may include a cylindrical shape.

A chamber may be formed between the valve seat and the projection, and the impact may be buffered by movement of the fluid located in the chamber.

The volume of the chamber can be changed by the movement of the protrusion.

The fluid can move between the outer surface of the protrusion and the inner surface of the valve seat.

Fluid transfer grooves may be formed on the outer surface of the protrusion or the inner surface of the valve seat.

A second resilient means may be interposed between the valve plate and the cap to push the valve plate in a second direction.

The flow control valve according to another embodiment of the present invention may include a housing including a supply hole through which fluid flows and a discharge hole through which the fluid flows, and a valve seat formed on one side.

Further, it may include a valve opening / closing body movably installed in the housing. Here, one end of the valve opening / closing body is inserted into the valve seat, so that the shock generated when the valve opening / closing body moves can be buffered.

The valve opening / closing member includes a valve plate having a protrusion formed therein, and the protrusion can be inserted into the valve seat.

As described above, the flow control valve according to the present embodiment has a damping structure that absorbs impact generated when the needle moves inside the valve body, thereby reducing the noise during valve opening and closing.

In addition, the effects of the present invention have various effects such as excellent durability according to the embodiments, and such effects can be clearly confirmed in the description of the embodiments described later.

1 shows a flow control valve according to an embodiment of the present invention.
Fig. 2 shows the damping structure formed by the protrusion of the valve seat and the valve plate.

Hereinafter, an embodiment of the present invention will be described in detail with reference to exemplary drawings. However, this is not intended to limit the scope of the invention.

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, the size and shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms specifically defined in consideration of the constitution and operation of the present invention are only for explaining the embodiments of the present invention, and do not limit the scope of the present invention.

1 shows a flow control valve 1 according to an embodiment of the present invention.

The flow control valve 1 according to an embodiment of the present invention includes a valve body 10 having a supply hole 10a through which a fluid flows and a control chamber 15 through which the fluid flows out at a controlled pressure. A needle 32 movably installed inside the valve body 10 and having a stopper 33 formed around the valve body 10 so as to restrict movement in a first direction P; A valve plate 30 installed inside the control chamber 15 and movable along with the needle 32 to open and close the first fluid transfer passage 17 between the control chamber 15 and the supply hole 10a; ); An armature (42) attached to the needle (32) to move the needle (32); A pole core 41 connected to one side of the valve body 10; A first elastic means (40) installed inside the pole core (41) to move the needle (32) in the first direction (P); And a stopper (20) inserted in one side of the control chamber (15) and having at least one outflow hole (23) for buffering shocks generated when the needle (32) ). ≪ / RTI > The first resilient means 40 may be, for example, a coil spring.

The valve body 10 may be composed of a plurality of pieces. The valve body 10 may include a first body 11, a second body 12, and a third body 13 according to an embodiment of the present invention. The second body 12 may be coupled to the first body 11. The third body 13 may be coupled to the second body 12. An insert 11c may be formed on one surface of the first body 11 in the axial direction A so as to be inserted into the second body 12. [ The outer diameter of the insertion portion 11c may include a first outer diameter 11a and a second outer diameter 11b. The second outer diameter 11b may be smaller in diameter than the first outer diameter 11a. The second body 12 may have a hollow portion therein. The hollow portion of the second body 12 may have a first inner diameter and a second inner diameter. The first inner diameter can correspond to the first outer diameter 11a. The second inner diameter may correspond to the second outer diameter 11b. The first outer diameter 11a may be in surface contact with the first inner diameter and the second outer diameter 11b may be in surface contact with the second inner diameter when the first body 11 is pressed into the second body 12. [ The third body 13 may be formed in a cylindrical shape. The second body 12 may be press-fitted into the third body 13 and coupled thereto.

The valve body 10 has a structure in which a plurality of pieces are coupled to each other, so that the assemblability of the flow control valve 1 can be improved. Also, since the insertion portion 11c of the first body 11 has various outer diameters, the airtightness of the valve can be improved.

A supply hole 10a may be formed radially inside the valve body 10 and a fluid may be introduced through the supply hole 10a.

The valve body 10 may include a guide portion 16 for guiding the needle 32 so that the needle 32 can move smoothly. A control chamber 15 may be formed in the axial direction A on one side of the valve body 10. The guide portion 16 may have a plate shape and a guide hole may be formed in the axial direction A so that the needle 32 can pass through the center. One surface of the guide portion 16 may be a surface of the operation chamber 19 in which the armature 42 is moved by a magnetic field and a stopper 33 formed on the needle 32 may be in contact with the guide surface. The other surface of the guide portion 16 may be formed on one side of the supply hole 10a. The guide hole, the needle 32 and the valve plate 30 may be arranged coaxially. The guide part 16 may be provided with a second fluid transfer passage 18 connecting one side of the guide part 16 and the other side. The fluid in the supply portion is movable to the working chamber 19 through the second fluid transfer passage 18. [

The control chamber 15 may have a cylindrical shape. One surface of the control chamber 15 may have an opening and the other surface may be connected to the supply hole 10a. A portion where the other surface of the control chamber 15 is connected to the supply hole 10a may be provided in the first fluid transfer passage 17. [ The fluid can move from the supply hole 10a to the control chamber 15 through the first fluid transfer passage 17. [ A contact surface 14 capable of contacting the valve plate 30 may be formed around a portion of the other surface of the control chamber 15 that is connected to the first fluid transfer passage 17. The contact surface 14 may be annular, depending on the embodiment.

The needle 32 may be a cylindrical rod. A portion of the circumferential surface of the needle 32 may be surrounded by the armature 42. A stopper 33 may be formed at another portion of the circumferential surface of the needle 32. The stopper 33 may include a protruding portion that projects radially from the circumferential surface of the needle 32 according to the embodiment. The stopper 33 may include a flange shape according to an embodiment. On one side of the stopper 33, a vortex forming groove 34 may be formed to provide a vortex to the fluid.

The valve plate 30 may be in a disc shape. One end constituting the circumferential surface of the valve plate 30 can be rounded. A protrusion 31 may be formed on one surface of the valve plate 30. According to the embodiment, the protrusion 31 may be formed at the center of one surface of the valve plate 30. The shape of the projection 31 may be a cylindrical shape. A portion of the other surface of the valve plate 30 is contactable with the aforementioned contact surface 14 of the guide portion 16. [

The stopper 20 may have an opening formed at one side thereof. At least one outlet hole 23 may be formed on one surface of the plug 20. The fluid staying in the control chamber 15 can flow out through the outlet hole 23 naturally. The stopper 20 can be press-fitted into the control chamber 15 in a direction in which the opening of the stopper 20 is formed, toward one side of the control chamber 15. It is preferable that the circumferential surface of the stopper 20 and the inner diameter of the control chamber 15 have a similar diameter so as to enable the above-described press-fitting.

A valve seat (21) may be formed at the center of the cap (20). The valve seat 21 may be formed by protruding from one surface of the stopper 20 where the outlet hole 23 is formed to the other side where the opening of the stopper 20 is formed. The valve seat 21 may be in the form of a sleeve having a space therein. The valve seat 21 and the projecting portion 31 of the valve plate 30 and the needle 32 can be arranged coaxially. The inner surface of the valve seat 21 and the outer surface of the protruding portion 31 of the valve plate 30 may correspond to each other in shape according to the embodiment. If the inner surface of the valve seat 21 is smooth, the outer surface of the protruding portion 31 may be a smooth surface corresponding to the outer surface of the valve seat 21. If the inner surface of the valve seat 21 is a concavo-convex surface, So that irregularities can be formed.

The needle 32 is capable of reciprocating linearly in the axial direction A. One end of the needle 32 may be located in the control chamber 15. [ The needle 32 penetrates the guide hole 15a and can be positioned across the supply holes 10a and 11. The needle 32 is movable in the first direction P or in the second direction Q of the axial direction A. [ The valve is opened while the needle 32 moves in the first direction P and the valve is closed as the needle 32 moves in the second direction Q. [ The needle 32 may stop in the first direction P during its movement. That is, while the needle 32 is moving in the first direction P, one surface of the stopper 33 formed on the needle 32 stops moving while contacting one surface of the guide portion 16 of the valve body 10 . At this time, when the stopper 33 and the guide portion 16 collide with each other, an impact noise may be generated.

The fluid supplied into the valve through the supply hole 10a may be introduced into the working chamber 19 through the second fluid transfer passage 18, depending on the embodiment. The stopper 33 of the needle 32 linearly moving in the working chamber 19 forms a vortex in the fluid located inside the working chamber 19 through the vortex forming groove 34 when moved in the first direction P The strength with which the stopper 33 and the guide portion 16 collide with each other can be reduced, and the impact noise can be reduced.

A second resilient means 22 may be interposed between the cap 20 and the valve plate 30. The second resilient means 22 may be, for example, a coil spring. One end of the second elastic means 22 can be guided by being fitted into the valve seat 21 and the other end can be brought into contact with the valve plate 30. The valve plate 30 can be pushed in the second direction Q by the elastic force of the second elastic means 22 and the contact surface 14 of the valve plate 30 and the valve body 10 can be brought into contact with each other .

Depending on the embodiment, the valve plate 30 and the needle 32 may be separate. In this case, when the needle 32 is positioned at the passage opening position, one end of the needle 32 and the valve plate 30 may be in contact with each other. When the needle 32 is located at the passage closing position, one end of the needle 32 and the valve plate 30 can be separated. One end of the needle 32 is brought into contact with the valve plate 30 while the needle 32 is moved from the flow path closing position to the flow path opening position and the valve plate 30 continues to move in the first direction P The valve can be opened by pushing. When the needle 32 moves from the passage opening position to the closing position, the valve plate 30 moves in the second direction Q by the elastic force of the second elastic means 22 and can close the valve.

Depending on the embodiment, the valve plate 30 and the needle 32 may not be separate. In this case, the valve plate 30 can move together with the movement of the needle 32. That is, when the needle 32 moves in the second direction Q, the valve plate 30 can move with the needle 32 in the second direction Q and close the valve. Wherein the second resilient means 22 may serve to assist the valve plate 30 and the needle 32 to move in the second direction Q. [

2 shows a damping structure formed by the valve seat 21 and the projection 31 of the valve plate 30. As shown in Fig. Fig. 2 (a) shows the case where the valve plate 30 is located at the passage opening position, and Fig. 2 (b) shows the case where the valve plate 30 is located at the passage closing position.

The stopper (20) and the valve plate (30) interact with each other to cushion an impact generated when the needle (32) is moved. A protrusion 31 formed on the valve plate 30 may be inserted into the valve seat 21 formed in the cap 20. Through this structure, a chamber C may be formed between the valve seat 21 and the protrusion 31. The impact generated when the needle 32 is moved by the movement of the fluid located in the chamber C can be buffered.

The volume of the chamber C may vary depending on the movement of the projection 31 formed in the valve plate 30. [ That is, when the protrusion 31 moves in the second direction Q, the volume increases, and when the protrusion 31 moves in the first direction P, the volume may decrease. Fluid can stay inside the chamber (C). The fluid can move between the outer surface of the protruding portion 31 facing each other and the inner surface of the valve seat 21 with a predetermined gap therebetween. A fluid movement groove may be formed on the outer surface of the protrusion 31 or the inner surface of the valve seat 21 to allow fluid to move. When the protrusion 31 moves in the first direction P, the volume of the chamber C is reduced and the fluid staying in the chamber C can escape to the outside (refer to FIG. 2 (a)). When the protrusion 31 moves in the second direction Q, the volume of the chamber C is increased and the fluid can flow into the chamber C (refer to FIG. 2 (b)).

Since the fluid is viscous, it can reduce the operating speed of the valve plate when entering or exiting the chamber (C). With this structure, the speed of movement of the needle 32 in the first direction P or the second direction Q can be reduced, whereby the impact force of the stopper 33 against the guide portion 16 is weak .

The distance between the outer surface of the protruding portion 31 facing each other and the inner surface of the valve seat 21 is preferably such that the buffering action of the needle 32 can sufficiently take place. Further, the depth of the fluid movement groove is also preferably formed to such an extent that the buffering action of the needle 32 can sufficiently take place.

The needle 32 can be moved by the solenoid magnetic field. The needle 32 is moved in the first direction P by the elastic force of the first elastic means 40 in a state in which no power is applied to the valve. In this case, since one end of the needle 32 pushes the valve plate 30 in the first direction P, the valve plate 30 also moves in the first direction P. This state is an open state of the valve. In this state, the fluid that has flowed into the supply hole 10a can move to the outlet hole 23 through the control chamber 15.

When power is applied to the valve, a solenoid magnetic field is generated to move the needle 32 including the armature 42 in the second direction Q. At this time, the valve plate 30 also moves in the second direction Q to close the valve.

The structure in which the solenoid magnetic field is formed is a well-known structure in the prior art, and a detailed description thereof will be omitted.

The flow control valve 1 according to another embodiment of the present invention includes a supply hole 10a through which a fluid flows and an outflow hole 23 through which the fluid flows and a valve seat 21 formed on one side housing; And a valve opening / closing body movably installed inside the housing. One end of the valve opening / closing body is inserted into the valve seat 21 to buffer the shock generated when the valve opening / closing body moves. have.

Here, the valve opening / closing body may correspond to the assembly including the valve plate 30, the needle 32, and the armature 42 in the above-described embodiment. That is, the valve opening / closing member includes a valve plate 30 having a protrusion 31 formed therein, and the protrusion 31 can be inserted into the valve seat 21.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: flow control valve 10: valve body
20: plug 21: valve seat
30: valve plate 31: protrusion
32: Needle 33: Stopper
40: first elastic means 41: pole core
42: amateur

Claims (15)

A valve body having a supply hole through which the fluid flows and a control chamber through which the fluid flows out at a controlled pressure;
A needle movably installed inside the valve body and having a stopper formed around the valve body so as to restrict movement in a first direction;
A valve plate installed inside the control chamber and movable together with the needle, the valve plate opening and closing a fluid transfer path between the control chamber and the supply hole;
An armature attached to the needle to move the needle;
A pole core connected to one side of the valve body;
A first elastic means installed inside the pole core to move the needle in the first direction; And
A cap inserted into one side of the control chamber and having at least one outlet hole, the cap interacting with the valve plate to cushion an impact generated when the needle moves;
And a flow control valve. The method according to claim 1,
Wherein the valve body comprises a plurality of pieces. The method according to claim 1,
Wherein a guide portion for guiding the needle is formed in the valve body so as to smoothly move the needle. The method of claim 3,
Wherein a groove is formed on one surface of the stopper to provide a vortex to the fluid. The method according to claim 1,
Wherein a valve seat is formed on one surface of the valve plate so that the protrusion is inserted into the valve. 6. The method of claim 5,
Wherein the projecting portion, the valve seat, and the needle are disposed coaxially with each other. 6. The method of claim 5,
Wherein an inner surface of the valve seat and an outer surface of the protruding portion correspond to each other in shape. 6. The method of claim 5,
Wherein the valve seat includes a sleeve shape, and the protrusion includes a cylindrical shape. 6. The method of claim 5,
Wherein a chamber is formed between the valve seat and the projection, and the impact is buffered by movement of a fluid located in the chamber. 10. The method of claim 9,
And the volume of the chamber is changed by the movement of the protrusion. 10. The method of claim 9,
And the fluid moves between the outer surface of the protrusion and the inner surface of the valve seat. 10. The method of claim 9,
And a fluid movement groove is formed on an outer surface of the protrusion or an inner surface of the valve seat. The method according to claim 1,
And a second elastic means is interposed between the valve plate and the stopper so as to push the valve plate in the second direction. A housing including a supply hole through which a fluid flows and a discharge hole through which the fluid flows, the valve seat being formed on one side; And
A valve opening / closing body movably installed inside the housing;
Wherein one end of the valve opening / closing body is inserted into the valve seat so as to buffer an impact generated when the valve opening / closing body moves. 15. The method of claim 14,
Wherein the valve opening / closing body includes a valve plate having a protrusion formed therein, the protrusion being inserted into the valve seat.

Images