KR200492234Y1 - 3-way valve - Google Patents

Abstract

The present invention relates to a three-way valve with improved watertightness, and more specifically, a first body having a shaft hole at the bottom, a fluid inlet and a first discharge part and a second discharge part formed intersecting each other around a central flow path part. And a valve body including a second body coupled to the bottom portion to seal the opening of the flow path portion; It consists of a shaft inserted into the shaft hole, a rotating plate coupled to one end of the shaft, an eccentric shaft eccentrically coupled to one surface of the rotating plate, an opening and closing ball extrapolated to and coupled to the eccentric shaft, and the opening and closing ball when the shaft is rotated. Including an opening and closing member for changing the discharge direction of the fluid by closing the first discharge part or the second discharge part while rotating in the circumferential direction of the flow path part, wherein the first body surrounds the shaft hole on one surface of the bottom part. Accordingly, it has an inner wall protruding to one side and a receiving groove in which the rotating plate is interpolated and coupled is provided inside one end of the inner wall, and the rotating plate itself is used as a watertight means to seal the gap between the shaft hole and the shaft to leak fluid. It relates to a three-way valve that can prevent.

Description

Three-way valve with improved watertightness {3-WAY VALVE}

The present invention relates to a three-way valve with improved watertightness, and more specifically, a first body having a shaft hole at the bottom, a fluid inlet and a first discharge part and a second discharge part formed intersecting each other around a central flow path part. And a valve body including a second body coupled to the bottom portion to seal the opening of the flow path portion; It consists of a shaft inserted into the shaft hole, a rotating plate coupled to one end of the shaft, an eccentric shaft eccentrically coupled to one surface of the rotating plate, an opening and closing ball extrapolated to and coupled to the eccentric shaft, and the opening and closing ball when the shaft is rotated. Including an opening and closing member for changing the discharge direction of the fluid by closing the first discharge part or the second discharge part while rotating in the circumferential direction of the flow path part, wherein the first body surrounds the shaft hole on one surface of the bottom part. Accordingly, it has an inner wall protruding to one side, and a receiving groove in which the rotating plate is interpolated and coupled is provided inside one end of the inner wall, and the rotating plate itself is used as a watertight means to seal the gap between the shaft hole and the shaft to leak fluid. It relates to a three-way valve that can prevent.

In general, a three-way valve is installed in a fluid supply device such as a boiler that supplies hot water and hot water for heating, so that the hot water and hot water for heating are supplied through separate pipes.

Such a three-way valve is provided with an opening and closing member that selectively closes the first discharge part and the second discharge part inside the valve body in which the inlet part, the first discharge part, and the second discharge part are formed intersecting in three directions, and flows into the inlet part. It is a device that switches the flow of the fluid so that the fluid is discharged to the open outlet.

At this time, the opening and closing member of the three-way valve, which is most commonly used, uses an opening and closing ball that is biased toward one side so as to contact each discharge portion while being spaced apart from the inlet portion with respect to the shaft by a predetermined distance.

As the shaft is rotated by a rotating plate provided outside the valve body, the opening and closing ball closes the corresponding discharge unit while the opening and closing ball is in close contact with the first discharge unit or the second discharge unit, so that the fluid is guided and discharged to the other open discharge unit. .

At this time, in order for the opening/closing ball to be provided in a position biased toward one side with respect to the shaft and to rotate by the shaft, the rotation plate is coupled to the upper end of the shaft, and the eccentric shaft with the opening/closing ball fitted to the edge of one side of the top surface of the rotation plate must be coupled. .

In this regard, Fig. 4 is a cross-sectional view of a conventional three-way valve.

A conventional three-way valve is built by fitting a shaft 2 to the bottom plate 1a of the upper body 1, and an eccentric shaft 3 is provided on one side of the rotating plate 2a coupled to the lower end of the shaft 2, The opening and closing ball (3a) is biased toward one side of the shaft (2).

However, in the conventional three-way valve, as can be seen in FIG. 4, the rotating plate 2a is provided at a position spaced apart from the bottom plate 2a by a predetermined distance, so that the rotating plate 2a is exposed to the flow path part 4d, As the shaft portion of the rotary plate 4d and the bottom plate 1a widens, the fluid in the flow path portion 4d frequently leaks through the gap between the shaft 2 and the bottom plate 1a, which is the main cause of failure of the three-way valve. Has become.

Of course, in order to prevent this, an O-ring that seals the gap with the shaft hole is inserted on the outer circumferential surface of the shaft 2, but since the O-ring is easily worn or damaged due to long-term repeated rotation of the shaft 2, the watertightness continues to be weak. There is a problem.

For reference, as techniques related to the conventional three-way valve, there are registered utility model No. 20-0287695, registered utility model No. 20-0309154, and registered utility model No. 20-0280150.

Accordingly, the present invention was devised to solve the above problems,

Using a rotating plate built by eccentric opening and closing ball as a kind of watertight means to prevent fluid leakage into the gap between the shaft hole and the shaft,

In particular, even if fluid evaporation through friction of the rotating plate and abrasion of the O-ring inserted in the shaft through the O-ring in close contact with the rotating plate, leakage of fluid can be prevented.

By preventing fluid from leaking into the gap between the first and second bodies constituting the valve body,

It is an object of the present invention to provide a three-way valve that can improve the overall watertightness between parts.

In order to achieve the above object, the three-way valve according to the present invention,

A second body having a first body having a shaft hole at the bottom, a fluid inlet and a first discharge part and a second discharge part intersecting each other around a central flow path part, and the bottom part being coupled to seal the opening of the flow path part. A valve body consisting of;

It consists of a shaft inserted into the shaft hole, a rotating plate coupled to one end of the shaft, an eccentric shaft eccentrically coupled to one surface of the rotating plate, an opening and closing ball extrapolated to and coupled to the eccentric shaft, and the opening and closing ball when the shaft is rotated. Including; an opening and closing member for changing the discharge direction of the fluid by closing the first discharge part or the second discharge part while rotating in the circumferential direction of the flow path part,

The first body has an inner wall protruding to one side along the periphery of the shaft hole on one surface of the bottom portion, and a receiving groove in which the rotating plate is interpolated and coupled to an inner side of one end of the inner wall body.

And in the three-way valve according to the present invention,

The first body includes a fitting portion having an inner diameter larger than the inner diameter of the shaft hole and smaller than the inner diameter of the receiving groove between the shaft hole and the receiving groove, and an O-ring extrapolated to the shaft is fitted in the fitting portion.

In addition, in the three-way valve according to the present invention,

The shaft includes one or more fitting grooves formed concave on an outer circumferential surface fitted in the shaft hole, and an O-ring is inserted into the fitting groove.

Furthermore, in the three-way valve according to the present invention,

The first body includes a watertight protrusion protruding to one side along the outer circumferential direction of the inner wall on one surface,

The second body is characterized in that it comprises a watertight groove that is formed concave at the other end of the side wall portion forming the flow path, the O-ring is inserted into the inner side and the watertight protrusion is inserted.

The three-way valve according to the present invention,

The rotating plate to which the opening and closing ball is eccentrically coupled is inserted into the inner wall of the first body so that the rotating plate itself functions as a kind of watertight means,

Watertightness is reinforced by adding an O-ring between the inner wall and the rotating plate, while minimizing the difference between the inner diameter of the shaft hole and the outer diameter of the shaft.

The watertightness of the valve body itself is reinforced through the male and female coupling of the watertight groove and watertight protrusions with O-rings inserted on each contact surface of the first and second bodies constituting the valve body.

By forcibly fitting the rotating plate into the receiving groove of the inner wall with a locking structure to prevent separation of the rotating plate and prevent leakage of fluid through the locking protrusion at the same time,

By enhancing the watertightness of the entire parts constituting the three-way valve, there is an effect of preventing the occurrence of failure due to leakage of fluid even during long-term use.

1 is a perspective view of a three-way valve according to the present invention.
Figure 2 is a first exploded perspective view of Figure 1;
Figure 3 is a cross-sectional view of Figure 1;
4 is a cross-sectional view showing a conventional three-way valve.

The present invention is intended to describe in detail in the text the bar, implementation (態樣, aspect) (or embodiment) that can apply various changes and have various forms. However, this is not intended to limit the present invention to a specific form of disclosure, it should be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference numerals, in particular the number of tens and ones, or the same number of tens, ones, and alphabet indicate members having the same or similar functions, and unless otherwise specified, each of the drawings The member indicated by the reference number can be identified as a member conforming to these criteria.

In addition, in each drawing, the size or thickness of the components in each drawing is expressed exaggeratedly large (or thick) or small (or thin) or simplified in consideration of convenience of understanding, but the scope of protection of the present invention is limited by this. It shouldn't be.

The terms used in this specification are only used to describe a specific embodiment (sun, 態樣, aspect) (or embodiment), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present application, terms such as ~comprise~ or ~consist~ are intended to designate the existence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of being added.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

The ~1~, ~2~, etc. described in the present specification will only be referred to to distinguish between different components, and are not limited to the order of manufacture, and the names in the detailed description and claims of the design It may not match.

In describing the three-way valve with improved watertightness according to the present invention, for convenience, if an approximate direction standard that is not strict is specified with reference to FIG. 3, the direction in which gravity acts as a lower side, In the detailed description and claims of the invention related to other drawings, unless otherwise specified, directions are specified and described in accordance with this standard.

Hereinafter, a three-way valve with improved watertightness according to the present invention will be described with reference to the accompanying drawings.

The present invention is installed in the piping of a fluid supply device such as a boiler and controls the flow direction of the fluid,

1 to 3, a valve body (B) through which a large fluid flows, and an opening/closing member 30 provided inside the valve body (B) to selectively open and close the discharge parts 23 and 24 Include.

The valve body (B) has a first body (10) having a shaft hole (12) in the bottom part (11), a fluid inlet part (22) and a first discharge part formed to cross each other around the central flow path part (21) (23) and a second discharge portion (24) is provided, and the bottom portion (11) is composed of a second body (20) coupled to seal the opening of the flow path portion (21).

The first body 10 is equipped with a cam and a control member (not shown) for rotating operation of the opening and closing member 30, and is located in the center of the bottom part 11 sealing the opening of the flow path part 21. A shaft hole 12 is provided.

In particular, the first body 10 has an inner wall 13 connected to one side (upper side in the drawing) protruding along the circumference of the shaft hole 12 on one side (upper surface of the drawing) of the bottom 11, and the inner wall body A receiving groove 14 having an inner diameter larger than that of the shaft hole 12 is formed inside one end (upper end in the drawing) of (13).

The receiving groove 14 is a rotating plate 32 of the opening and closing member 30 is inserted and coupled, and the rotating plate 32 is inserted into the receiving groove 14 to cover the opening of the shaft hole 12 to cover the shaft hole 12 It prevents the fluid from leaking between the and the shaft 31.

That is, the gap is filled through the male-male coupling structure of the rotating plate 32 and the receiving groove 14 so that the rotating plate 32 functions as a kind of watertight means separate from the O-ring.

In addition, the first body 10 includes a fitting portion 15 formed between the shaft hole 12 and the receiving groove 14 and having an inner diameter larger than the inner diameter of the shaft hole 12 and the receiving groove 14 being smaller than the inner diameter, A first O-ring 15R extrapolated to the shaft 31 is fitted into the fitting part 15.

The rotating plate 32 and the first O-ring 15R are each airtight by a step (multi-stage) structure between the receiving groove 14 of the inner wall 13-the fitting part 15-the shaft hole 12, and thus the flow path part 21 ) It prevents the leakage of the internal fluid and, in particular, extends the leakage path of the leaked fluid, and contributes to strengthening the watertightness through the fluid evaporation according to the rotation of the rotating plate 32 and the adhesion of the first O-ring 15R.

Further, the first body 10 further includes a watertight protrusion 16 protruding to one side along the outer circumferential direction of the inner wall 13 on one surface, and the first and second bodies 10 and 20 When combined, the watertight protrusion 16 is inserted into the watertight groove 26 of the second body 20 to improve watertightness.

Next, the second body 20 has a dome-shaped flow path part 21 with the other surface (top and bottom of the drawing) opened, and an inlet part 22 is provided at one side of the flow path part 21, and the inlet part ( 22), the first discharge part 23 and the second discharge part 24 are provided in a straight line, respectively, so that the inlet part 22 and the first and second discharge parts 23 and 24 Cross formed.

In the drawing, a form in which the outlet of the second discharge part 24 is branched in one direction orthogonal to the length direction of the second discharge part 24 is shown, but the present invention is not limited thereto.

Of course, the angle formed between the inlet 22 and the first and second outlets 23 and 24 may be different.

The flow path part 21 is a built-in opening and closing ball 34 of the opening and closing member 30 so that the fluid flowing into the inlet part 22 is discharged to the first discharge part 23 or the second discharge part 24. The opening of the flow path part 21 is coupled to the other surface of the opening and the bottom part 11 of the second body 20 that protects a cam for rotating operation of the opening/closing member 30 and a control member (not shown). Is sealed.

In addition, the second body 20 is formed concave at the other side end (top and bottom end of the drawing) of the side wall 25 forming the flow path 21, and the second O-ring 26R is inserted inside the watertightness. It further includes a watertight groove 26 into which the protrusion 16 is inserted.

The watertight protrusion 16 and the watertight groove 26 have a shape corresponding to each other, and are male and female when the bodies 10 and 20 are combined, and in particular, the watertight groove 26 than the protruding height of the watertight protrusion 16 ) Has a larger depth, so that the watertight protrusion 16 is inserted into the watertight groove 26 while the second O-ring 26R is fitted inside the watertight groove 26, thereby compressing the second O-ring 26R. It prevents the fluid from leaking into the gap between the first and second bodies 10 and 20.

Subsequently, the opening/closing member 30 is a shaft 31 inserted into the shaft hole 12 to be built, a rotating plate 32 coupled to one end of the shaft 31, and an eccentric eccentrically coupled to one surface of the rotating plate 32 It consists of a shaft 33 and an opening/closing ball 34 extrapolated to and coupled to the eccentric shaft 33, and the opening/closing ball 34 rotates in the circumferential direction of the flow path part 21 when the shaft 31 is rotated. While moving, the first discharge part 23 or the second discharge part 24 is closed to change the discharge direction of the fluid.

The shaft 31 has a shaft portion 31A at the other end, and the cam built in the first body 10 is coupled, and the shaft 31 rotates together while the cam rotates by a motor.

The rotary plate 32 is coupled to one end (upper end in the drawing) of the shaft 31 in the center, and the eccentric shaft 33 is protruded to one side on one side off the center of the rotary plate 32.

On the outer circumferential surface of the eccentric shaft 33, an opening/closing ball 34 that can be closed in contact with the inlet of the first and second discharge parts 23 and 24 is fitted and coupled. At this time, the eccentric shaft 33 and the inlet 22 The distance between the opening and closing balls 34 is greater than the radius, and the distance between the eccentric shaft 33 and the respective discharge portions 23 and 24 is formed equal to the radius of the opening and closing balls 34.

Therefore, when the shaft 31 is rotated by the operation of the cam, the opening and closing ball 34 rotates along a path away from the center of the rotating plate 32 (that is, the shaft 31). Since the outer surface of the ball 34 does not contact the inlet portion 22, the opening and closing ball 34 rotates while the inlet portion 22 is always open, so that the opening and closing ball 34 is moved to the first discharge portion 23 ) Or by closing each discharge part while contacting only the second discharge 24 so that the fluid supplied to the inlet part 22 passes through the flow path part 21 and is not closed by the opening/closing ball 34, that is, to the open discharge part. Is discharged.

The opening/closing member 30 generates a control signal by a control member composed of switches that are in contact with the outer circumferential surface of the cam and selectively intermittently interrupted by the rotation of the cam, so that the rotational movement of the opening and closing ball 34 is stopped, Such a control member is a known technology (registered patent No. 10-1803803, etc.), and a detailed description of the control member is omitted.

Meanwhile, the shaft 31 includes one or more fitting grooves 31a formed concave in the outer circumferential surface fitted in the shaft hole 12, and a third O-ring 31R is fitted in the fitting groove 31a.

The third O-ring 31R assists the rotating plate 32 and the first O-ring 15R to prevent leakage of fluid.In particular, the present invention is that the third O-ring 31R is fitted to the outer peripheral surface of a simple columnar shaft. A third O-ring (31R) having an outer diameter larger than the outer diameter of the shaft 31 is not lost, but is in close contact with the inner circumferential surface of the shaft hole 12 in a form that protrudes from the outer circumferential surface of the shaft 31 through the fitting groove 31a. Thus, while minimizing the gap between the shaft hole 12 and the shaft 31, it is possible to further reinforce the watertightness by sealing the fine gap with the third O-ring 31R.

That is, in the present invention, the rotating plate 32 first blocks the fluid leaking into the shaft hole 12,

Even if fluid penetrates into the gap between the rotating plate 32 and the receiving groove 14, the fluid leaks by extending the path through which the fluid leaks through the multi-stage structure of the receiving groove 14-fitting part 15-shaft hole 12 By increasing the time, the leaked fluid is evaporated by frictional heat with the rotating rotating plate 32,

The fluid that has not evaporated is secondarily blocked by the first O-ring 15R,

When fluid leaks despite the first O-ring 15R, the fluid evaporation due to frictional heat of the shaft 31 and the third O-ring 31R(s) prevent leakage of the fluid thirdly,

The watertightness of the coupling portion between the valve body (B) and the opening/closing member 30 is greatly reinforced, and leakage of fluid is completely blocked.

In addition, the present invention also has a watertight structure formed by the watertight protrusion 16 and the watertight groove 26 and the second O-ring 26R on the coupling portions of the first and second bodies 10 and 20. , The watertightness of all parts of the three-way valve except for the inlet 22 and the first and second discharge parts 23 and 24 is improved, thereby preventing fluid leakage.

On the other hand, the rotating plate 32 is forcibly fitted into the receiving groove 14, at this time, the watertightness increases as the outer circumferential surface of the rotating plate 32 and the inner circumferential surface of the receiving groove 14 are closely contacted, but the rotating plate 32 and the receiving groove 14 ), if the friction increases due to close contact, the rotational operation of the opening/closing member 30 becomes disadvantageous.

Accordingly, the present invention is a locking protrusion for preventing separation of the rotating plate 32 and reinforcing watertightness while minimizing the rotation of the rotating plate 32, as shown in the enlarged cross-sectional view of the upper right of FIG. 3 showing a modified example. 17) was introduced.

Specifically, the depth of the receiving groove 14 (the height of the inner circumferential surface) is greater than the thickness of the side surface of the rotating plate 32, and the inner diameter of the receiving groove 14 is greater than the outer diameter of the rotating plate 32,

At one end of the inner circumferential surface of the receiving groove 14, a locking protrusion 17 protruding so that the inner diameter is smaller than the outer diameter of the rotating plate 32 is provided.

The locking protrusion 17 protrudes in an inverted triangle or semicircular shape formed to be inclined upward from one side to the other side.

Therefore, when assembling the three-way valve, if the rotating plate 32 is forcibly fitted into the receiving groove 14 of the inner wall 13, the locking protrusion 17 whose thickness decreases gradually toward the inner end portion is formed around the edge of the rotating plate 32. Covers to prevent separation of the rotating plate 32 and prevent leakage of fluid, and at this time, the diameter of the receiving groove 14 and the rotating plate 32 as the edge of the rotating plate 32 is in line contact with the lower surface of the locking protrusion 17 By minimizing the friction area through the difference, it is possible to reduce rotational interference of the rotating plate 32 according to the insertion structure of the receiving groove 14.

In the above description of the present invention, a three-way valve with improved watertightness has been described with reference to the accompanying drawings, but the present design can be variously modified, changed, and substituted by those skilled in the art, and such modifications, changes and substitutions are It should be construed as falling within the scope of protection.

B: Valve body
10: first body 11: bottom
12: shaft work 13: inner wall
14: receiving groove 15: fitting
15R: 1st O-ring 16: Watertight projection
17: stumbling block
20: second body 21: flow path portion
22: inlet 23, 24: discharge
25: side wall portion 26: watertight groove
26R: 2nd O-ring
30: opening and closing member 31: shaft
31A: shaft part 31a: fitting groove
31R: 3rd O-ring 32: rotating plate
33: eccentric shaft 34: opening and closing ball

Claims (4)

The first body 10 having the shaft hole 12 in the bottom 11, the fluid inlet 22, the first discharge part 23 and the second discharge formed crossing each other around the central flow path part 21 A valve body (B) comprising a second body (20) having a portion (24) and coupled to the bottom portion (11) to seal the opening of the flow path portion (21);
A shaft 31 inserted into the shaft hole 12 and installed, a rotating plate 32 coupled to one end of the shaft 31, an eccentric shaft 33 eccentrically coupled to one surface of the rotating plate 32, and the eccentric shaft It consists of an opening/closing ball 34 that is extrapolated to and coupled to (33), and when the shaft 31 is rotated, the opening/closing ball 34 rotates in the circumferential direction of the flow path part 21 while the first discharge part ( 23) or an opening/closing member 30 for switching the discharge direction of the fluid by closing the second discharge part 24; including,

The first body 10 has an inner wall 13 connected to one side protruding along the circumference of the shaft hole 12 on one side of the bottom 11, and the rotating plate inside one end of the inner wall 13 ( 32) is provided with a receiving groove 14 that is interpolated and coupled,
The depth of the receiving groove 14 is greater than the thickness of both sides of the rotating plate 32, and the inner diameter of the receiving groove 14 is greater than the outer diameter of the rotating plate 32,
It characterized in that it comprises a locking protrusion 17 protruding in an inverted triangle or semi-circular shape at one end of the inner circumferential surface of the receiving groove 14 so as to protrude so that the inner diameter is smaller than the outer diameter of the rotating plate 32 and inclined upwardly from one side to the other. Three-way valve.
The method of claim 1,
The first body 10 includes a fitting portion 15 between the shaft hole 12 and the receiving groove 14 that is larger than the inner diameter of the shaft hole 12 and the receiving groove 14 is formed smaller than the inner diameter, A three-way valve, characterized in that an O-ring (15R) extrapolated to the shaft (31) is fitted in the fitting portion (15).
The method of claim 2,
The shaft (31) includes one or more fitting grooves (31a) formed concave in the outer circumferential surface fitted in the shaft hole (12), the three-way valve, characterized in that the O-ring (31R) is fitted in the fitting groove (31a).
The method according to any one of claims 1 to 3,
The first body 10 includes a watertight protrusion 16 protruding to one side along the outer circumferential direction of the inner wall 13 on one surface,
The second body 20 is formed concave at the other end of the side wall portion 25 forming the flow path portion 21, the O-ring 26R is inserted into the watertight groove into which the watertight protrusion 16 is inserted A three-way valve comprising (26).

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