JP2002228022A - Valve structure, two-way valve and three-way valve utilizing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve structure, two-way valve and three-way valve utilizing the same capable of reducing damages to a valve seat and a valve element even if dust and fine particles are contained in fluid and of showing valve functions stable for a long time. SOLUTION: Annular seal members 28, 30 are installed in a valve element housing recess part 16 defined in conduits 4, 6 communicating in a straight manner. The valve element 20 formed with an annular guide groove 22 is housed in the valve element housing recess part 16 movably in a designated range through valve shaft guides 36, 38. The valve seat 32 is formed on an open-end surface of the conduit 4 in the valve element housing recess part 16. An end of pin 46 is faced to the guide groove 22. The pin 46 of which one end is arranged in the guide groove 22 is operated and the pins 46 and the valve element 20 are moved to adjust size of the flow passage between the valve element 20 and the valve seat 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve structure and two-way and three-way valves using the same.

[0002]

2. Description of the Related Art Conventionally, for example, ball valves have been widely used for controlling the flow rates of cold and hot water in air conditioning, controlling the flow rate of chemicals in chemical plants, and controlling the flow rate of gas in the gas field. In this ball valve, the valve can be opened and closed only by turning the ball 90 ° through a valve stem with a handle, so that the handle is turned several to several tens of times like a ball valve. There is no advantage, and there is an advantage that the operation is quick and simple. On the other hand, when a sudden operation is performed, there is a problem that a water hammer or the like is easily generated due to a pressure change, and further, there is a disadvantage that fluid adjustment is difficult.

On the other hand, as shown in FIG.
No. 766 discloses a ball valve capable of adjusting a flow rate. In this ball valve 100, the shape of the side facing the inlet 106 in the through hole 104 formed in the ball valve body 102 is circular, and the shape of the outlet 108
Is formed in a fan shape. In such a ball valve 100, the fluid flow rate in the direction of the arrow can be gradually adjusted as the ball valve body 102 rotates.

[0004]

However, in such a ball valve 100, when dust or fine particles are contained in the fluid, the dust and the fine particles are caught in the gap between the ball valve body 102 and the valve seat forming member 110. There was a problem of getting stuck. If dust or the like is bitten, the sliding contact occurs repeatedly during valve operation on the valve seat forming member 110, so that the valve seat forming member 110 and the ball valve body 102 are worn or damaged, or the valve seat forming Piercing the member 110,
There is a possibility that the valve function may be reduced.

According to the present invention, in view of such circumstances, even if the fluid contains dust and fine particles, the valve seat and the valve body are hardly damaged by the dust and fine particles, and are stable for a long period of time. It is an object of the present invention to provide a valve structure capable of exerting the above-mentioned valve function, and a two-way valve and a three-way valve using the valve structure.

[0006]

In order to achieve the above object, a valve structure according to the present invention has an annular sealing member mounted in a valve body receiving recess defined in a linearly communicating pipe. A valve body having an annular guide groove formed therein is accommodated movably for a predetermined section via a valve shaft guide, and a valve seat is formed on an opening end face of the pipe in the valve body accommodating recess. By facing one end of the pin in the guide groove and operating the pin having one end arranged in the guide groove to move the valve body together with the pin, the position between the valve body and the valve seat is reduced. It is characterized in that the size of the fluid passage is adjusted.

According to the valve structure of the present invention having such a structure, the valve element is configured to slide linearly in the linear fluid passage, and the valve element always moves in the valve element accommodating recess. Since the rotating motion itself is possible, even if dust and the like are contained in the fluid, the dust and the like can flow away from the periphery of the valve body. Here, in the valve structure according to the present invention, it is preferable that a spring member is interposed between the valve body and the valve shaft guide in a compressed state.

With such a configuration, the valve body and the valve shaft guide can be stably held in the valve body accommodating recess, and the adjustment of the fluid passage becomes easy. Further, in the present invention, it is preferable that the flow rate of the fluid flowing in the pipeline is proportionally controlled by the movement of the pin. With such a configuration, it can be preferably used as a flow control valve.

Further, in the two-way valve according to the present invention, the valve housing recess is formed between the first pipe and the second pipe which communicate linearly, and the first pipe is provided. A valve box in which an annular valve seat is formed on an open end surface of at least one of the conduits or the second conduit, which is located on the downstream side or the upstream side in the fluid flow direction of the valve body housing recess; The valve body is movably accommodated in the valve body accommodating recess of the valve box, a central through-hole is formed in a shaft core portion, and an annular guide groove is further formed in a circumferential direction to face the valve seat. A valve body having a seal member mounting groove formed at an end thereof, an annular seal member mounted in the seal member mounting groove of the valve body, and both end portions press-fitted into the central through hole of the valve body. And a valve shaft disposed so as to protrude outward from the valve body, and inside the fluid passage of the valve shaft. A valve shaft guide for guiding the movement of the valve body, a pin having one end inserted into the guide groove of the valve body, and an actuator for moving the pin to one side or the other side of the fluid passage. The size of the fluid passage is adjusted by sliding the valve body by a force applied to the pin from a distance.

According to the present invention, there is provided a two-way valve capable of exhibiting a stable valve function for a long period of time without damaging the valve element and the valve seat due to the influence of dust and the like. can do. Here, in the two-way valve according to the present invention, it is preferable that a spring member is interposed between the valve body and the valve shaft guide in a compressed state.

With such a configuration, the valve element and the valve shaft guide can be stably held in the valve element accommodating recess, and the adjustment of the opening degree of the fluid passage becomes easy. In the three-way valve according to the present invention, the valve body accommodating recess is formed at a connection portion between the first, second, and third pipes arranged in a substantially T shape. A valve box having an annular valve seat formed on an opening end face of the first pipe line and the second pipe line communicating with each other linearly; and a valve box movably housed in the valve box. A valve body in which a central through-hole is formed in a shaft core portion, an annular guide groove is formed in a circumferential direction, and seal member mounting grooves are formed at both ends, respectively. An annular seal member, a valve shaft which is press-fitted into the central through hole of the valve body, and both ends of which are disposed so as to protrude outward from the valve body, and a fluid passage of the valve shaft. A valve shaft guide for guiding the movement of the valve, a pin having one end inserted into the guide groove of the valve body, An actuator for moving the valve, and the valve body is slid by the force applied from the actuator to the pin to adjust the size of the fluid passage or change the flow direction of the fluid. It is characterized by controlling.

According to the present invention, there is provided a three-way valve capable of exhibiting a stable valve function for a long period of time without damaging the valve body and the valve seat due to dust and the like. be able to. Here, in the three-way valve according to the present invention, it is preferable that a spring member is interposed between the valve body and the valve shaft guide in a compressed state.

With this configuration, the valve body and the valve shaft guide can be stably held in the valve body accommodating recess, and the opening degree of the fluid passage can be easily adjusted.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a three-way valve employing a valve structure according to an embodiment of the present invention. In this three-way valve 2, a substantially T-shaped valve box 10 in which a first conduit 4, a second conduit 6, and a third conduit 8 are formed.
Is provided, and the open end face of the valve box 10 is sealed by a valve lid 11.

The valve box 10 is composed of two divided bodies.
The first pipe line 4 is formed in one valve box portion 12 formed in a substantially cylindrical shape, and the second pipe line is formed in the other valve box portion 14 formed in a substantially L shape. 6 and a third conduit 8 are formed. Further, the first, second, and third conduits 4, which are formed when these two divided bodies are joined to each other,
A cylindrical valve body accommodating recess 16 is formed at the meeting portion of 6,8.

The first conduit 4 facing the valve housing recess 16.
A first valve seat 32 is formed on the opening end face of the second pipe line 6 facing the valve body housing recess 16.
Is formed. A valve shaft guide 36 having a liquid passage is accommodated in a stepped portion between the large-diameter portion and the small-diameter portion constituting the first conduit 4 in a movable state.
A valve shaft guide 38 having a liquid passage is accommodated in a stepped portion between the large-diameter portion and the small-diameter portion constituting the pipe line 6. Note that these valve shaft guides 36, 3
The shape 8 is not limited to the shape of the embodiment, and any other shape may be adopted as long as it guides the sliding of the valve shaft 18 and a liquid passage is formed inward.

On the other hand, a valve body 20 slidable in the left-right direction is housed in the valve body housing recess 16. The valve body 20 is guided to move in the left-right direction by the valve shaft 18 pressed into the central through hole 40. The valve shaft 18 is slidably supported by shaft portions of the valve shaft guides 36 and 38. The valve element 20 is, as shown in the figure,
The left half and the right half are formed symmetrically, and both ends are gradually narrowed in diameter. An annular guide groove 22 is formed on the outer peripheral surface at the center of the valve body 20.

Further, on both sides of the guide groove 22 of the valve body 20, seal member mounting grooves 24 and 26 are similarly formed in an annular shape, and rubber and the like are formed in the seal member mounting grooves 24 and 26. Annular seal members 28 and 30 are mounted respectively. Compressed spring members 42 and 44 are interposed between both end portions of the valve body 20 and the valve shaft guides 36 and 38, respectively.
Are fixed so that the valve shaft guides 36 and 38 do not move in the axial direction.

Further, a pin 46 for operating the valve element 20 is provided in the guide groove 22 formed in the valve element 20.
Is inserted at one end. The other end of this pin 46 is connected to a second pin 48 arranged in a direction perpendicular to this,
The other end of the second pin 48 is connected to a spindle 52 of a motor housed in a casing 50. Therefore, in the three-way valve 2 having such a valve structure, when the spindle 52 is rotated by a predetermined angle by driving a motor (not shown), the second pin 4
8 and the pins 46 connected thereto are shown in FIG.
It is possible to turn in any direction of the arrow Y. Thus, when the pins 46 and 48 pivotally move in either direction of the arrow Y, the valve body 20 slides linearly in the valve body housing recess 16. At this time, the pin 46 draws an arc-shaped rotation trajectory in the guide groove 22. However, since the pin 46 is inserted into the annular guide groove 22, it is impossible for the valve body 20. No force is applied, and the valve body 20 can be slid in the linear direction. At this time, the valve shaft 18 is connected to the valve shaft guide 36,
It is guided to a shaft portion 38.

In FIG. 1, reference numeral 56 denotes an O-ring interposed between the valve box part 12 and the valve box part 14, and reference numeral 58 denotes a valve box part 14 and the valve cover 11 5 shows an O-ring interposed between the first and second O-rings. When such an O-ring is interposed,
It is preferable to apply grease in advance. In the present embodiment, a stepping motor is employed as the motor, so that the rotation angle of the spindle 52 can be adjusted.

In the three-way valve 2 configured as described above, by sliding the valve body 20 in the left-right direction, the third
The fluid flowing into the second pipeline 8 can flow from the third pipeline 8 to one of the first pipeline 4 and the second pipeline 6. In addition, by changing the direction of the valve element 20, it is possible to flow through the opposite conduit. The operation will be described below.

Now, the valve body 20 is in the state shown in FIG. That is, the valve body 20 is located on the left side of the figure, one of the annular seal members 30 is separated from the first valve seat 32, and the other annular seal member 28 is in contact with the second valve seat 34. I have. Even in this state, the spring members 42 and 44 are both in a compressed state. Therefore, the valve shaft guides 36 and 38 are fixed so as not to move in the axial direction by the urging forces of the spring members 42 and 44, respectively.

In such a state, the third pipeline 8 and the first
And the third pipeline 8 and the second pipeline 6 are shut off. Therefore, the fluid
From the line 8 to the first line 4, ie, the arrow A
It is set to flow in the direction. When a signal is input to adjust the flow rate flowing in the direction A from this state, the rotational force of the motor is transmitted from the spindle 52 to the second pin 4.
The signal is transmitted to a pin 46, which is an output terminal, via the terminal 8. Then, the pin 46 moves in the guide groove 22 in the right arrow Y direction in FIG. Then, the valve element 20 is
Is slid toward the first pipeline 4 by a distance corresponding to the movement of. When the valve body 20 slightly moves to the first pipe line 4 side,
Since the opening area between the third conduit 8 and the first conduit 4 is reduced, the fluid flow rate can be reduced according to the opening area. If the amount of decrease is controlled, the flowing flow rate can be proportionally controlled.

When the valve body 20 moves linearly in this manner, the pin 46 can move in the circumferential direction in the annular guide groove 22 in addition to the disk-like shape of the valve body 20. Therefore, the valve body 20 can also turn in the arrow Z direction. Therefore, when the valve element 20 linearly moves, a slight rotational movement is performed. When the posture is changed in the direction in which the valve element 20 rotates, that is, in the Z direction, the contact surface between the annular seal member 28 and the second valve seat 34,
Alternatively, the contact surface between the annular seal member 30 and the first valve seat 32 is not always the same, but changes every time. Therefore, the annular sealing members 28 and 30 or the valve seat 3
Local uneven wear such as 4, 32 can be prevented. Furthermore, if the valve element 20 rotates in this way, even if dust and fine particles enter the space between the valve element and the valve seat, the dust and fine particles and the like flow away in the flow of the fluid. Can be. Therefore, the valve structure of the present embodiment has the self-cleaning function as described above, so that the valve function is not impaired.

On the other hand, in such a three-way valve 2, if the valve body 20 is moved to the rightmost,
Will come into contact with the first valve seat 32. This allows
The fluid passage from the third line 8 to the first line 4 is blocked, and instead the line 6 from the third line 8 to the second line
To the fluid passage. According to the valve structure of the present embodiment, when one of the annular seal members 30 is in contact with the first valve seat 32 or the other annular seal member 28 is in contact with the second valve seat 34. For example, since the frictional resistance of the annular seal member 30 or the annular seal member 28 is generated, the valve body 20 does not rotate in the Z direction in FIG. As described above, when the valve body 20 does not rotate in the Z direction, that is, when one of the annular seal members 30 and 28 is in contact with the corresponding valve seats 32 and 34,
Even if dust or the like stays in the valve portion, the valve seat and the annular seal member are not damaged because the valve is closed. On the other hand, while the valve body 20 is moving rightward or leftward in the valve box, the valve body 20 rotates in the Z direction. It does not stay in the surroundings, and is caused to flow downstream by the self-cleaning function described above. Therefore, the valve function does not decrease.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example,
In the above embodiment, the flow rate is proportionally controlled by the stepping motor, but the flow rate adjustment is not limited to this. For example, by manually operating the handle etc.
It can also be adjusted visually. If the proportional control is unnecessary, an ON / OFF switching valve can be used by using a DC motor, a valve closing positioning sensor, or the like.

Further, the actuator for inputting a force to the pin 46 is not limited to the above-described embodiment, and another structure can be adopted. In short, any structure may be used as long as the pin 46 is movable in the circumferential direction in the guide groove 22 and the valve body 20 is moved in this state. Further, in the above embodiment, the valve structure of the present invention has been described by taking a three-way valve as an example.
It can also be adopted in a two-way valve 60 as shown in FIG.
In FIG. 3, the same elements as those in FIG.
Detailed description is omitted.

In the two-way valve 60, the other valve box portion 14
And the first conduit 4 of one valve box part 12
And communicate linearly. Thus, the fluid can flow from left to right in FIG. 3 or vice versa, as indicated by the arrows. Further, in this embodiment, only one annular seal member 30 is interposed in the valve body 64 housed in the valve body housing recess 62. Therefore, the first valve seat 32 is formed on the open end face of one valve box portion 12, but no valve seat is formed on the other valve box portion 14. Other structures are formed substantially in the same manner as the three-way valve of FIG.

Even with such a two-way valve 60, the valve body 6
When the 4 slides linearly, the pin 46 can pivot in the guide groove 22. Therefore,
Since the contact position of the annular seal member 30 with respect to the valve seat 32 changes every time, there is no local abrasion or biting of the valve seat 32, the annular seal member 30, and the like. Even if the fine particles and the like exist around the contact portion between the valve seat 32 and the seal member 30, the dust and the fine particles can flow out in the flow of the fluid by the self-cleaning function. Therefore, the valve function between the seal member 30 and the valve seat 32 can be maintained for a long time.

As described above, the valve structure of the present invention is not limited to a three-way valve, but is applicable to a two-way valve. Further, the valve bodies 20 and 64 according to the above embodiments may be formed by cutting one block, or may be configured by assembling a plurality of members. Further, the valve shaft 18 is also provided with the valve body 2.
0,64.

Further, in the three-way valve 2 and the like, the shapes of the one valve box portion 12 and the other valve box portion 14 are not limited to the embodiments, and other structures can be adopted. In each of the above embodiments, the valve shaft guides 36 and 38 are accommodated in the valve box portions 12 and 14 so as to be movable at the time of assembly. It is also possible to dispose it in a non-movable state, that is, a fixed state, within 14. As shown in these embodiments, when the valve shaft guides 36, 38 are accommodated in a movable state, the two spring members 42, 44 are necessarily required. The spring members 42 and 44 are not always necessary if the is fixed in the valve box by means such as press fitting.

In addition, one of the two valve shaft guides 36 and 38 may be accommodated in a movable state, and the other valve shaft guide may be arranged in a non-movable state. In that case, the spring member is required for the movable valve shaft guide, but the spring member is not required for the immovable valve shaft guide. However, in order to stabilize the valve body, it is preferable that the spring member is also interposed in the valve shaft guide on the fixed side.

As described above, the various components constituting the valve are not limited to the shapes and modes of the embodiment.

[0034]

As described above, according to the valve structure of the present invention, the valve element can move in the linear direction and can rotate.
Unlike a valve using a ball such as a ball valve, dust and fine particles in a fluid do not stay around the valve seat. Therefore, wear and damage of the valve seat and valve body, etc.
Biting of fine particles and the like can be prevented. Thereby, a stable valve function can be exhibited over a long period of time.

When such a valve structure is applied to a two-way valve and a three-way valve, it can be preferably used as a flow control valve, a switching valve, and the like.

[Brief description of the drawings]

FIG. 1 is a sectional view of a three-way valve having a valve structure according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part in a state where a valve lid in FIG. 1 is removed.

FIG. 3 is a cross-sectional view of a two-way valve having a valve structure according to the present invention.

FIG. 4 is a cross-sectional view of a ball valve having a conventional valve structure.

[Explanation of symbols]

 2 Three-way valve 4 First conduit 6 Second conduit 8 Third passage 10 Valve box 16 Valve housing recess 18 Valve shaft 20 Valve 22 Guide groove 24, 26 Seal member mounting groove 28 Ring seal member 30 Ring Seal member 32 Valve seat 34 Valve seat 36 Valve shaft guide 38 Valve shaft guide 40 Central through hole 42 Spring member 44 Spring member 46 Pin 60 Two-way valve 62 Valve body housing recess 64 Valve body

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H062 AA02 AA11 BB02 BB26 BB28 CC01 DD01 EE08 FF39 FF40 HH02 HH03 HH04 3H067 AA02 BB02 CC02 CC04 CC14 CC22 CC54 DD08 DD32 DD47 EA33 ED02 ED04 FF11 GG02GG12GG

Claims (7)

[Claims] 1. A valve body in which an annular seal member is mounted and an annular guide groove is formed in a valve body accommodating concave portion defined in a linearly communicating pipe, via a valve shaft guide. While accommodating in a predetermined section movably, a valve seat is formed on the opening end face of the pipe in the valve body accommodating recess, and one end of a pin faces the guide groove, and one end is located in the guide groove. A valve structure characterized in that the size of a fluid passage between the valve body and the valve seat is adjusted by operating the arranged pin to move the valve body together with the pin. 2. The valve structure according to claim 1, wherein a spring member is interposed between the valve body and the valve shaft guide in a compressed state. 3. The valve structure according to claim 1, wherein a flow rate of the fluid flowing in the pipeline is proportionally controlled by movement of the pin. 4. A valve body accommodating recess is formed between a first conduit and a second conduit that communicate linearly with each other.
An annular valve seat is formed at an opening end face of at least one of the first and second conduits located downstream or upstream in the fluid flow direction of the valve body housing recess. A valve box, which is movably housed in the valve body housing recess of the valve box, has a central through-hole formed in a shaft core portion, and further has an annular guide groove formed in a circumferential direction; A valve body having a seal member mounting groove formed at an end facing the seat; an annular seal member mounted in the seal member mounting groove of the valve body; and press-fitting into the central through hole of the valve body. A valve shaft having both ends protruding outward from the valve body; a valve shaft guide for guiding the movement of the valve shaft in the fluid passage; and a valve shaft in the guide groove of the valve body. A pin having one end inserted therein, and the pin being connected to one side or the other side of the fluid passage. A two-way valve, comprising: an actuator for moving the valve body; and adjusting a size of the fluid passage by sliding the valve body by a force applied to the pin from the actuator. . 5. The two-way valve according to claim 4, wherein a spring member is interposed between the valve body and the valve shaft guide in a compressed state. 6. A first conduit and a second conduit arranged substantially in a T shape.
A valve body accommodating recess is formed at a connecting portion between the first and second pipelines, and annular end faces of the first and second pipelines that are linearly communicated with each other have annular shapes. A valve box having a valve seat formed therein, movably housed in the valve box, a central through hole formed in a shaft core portion, and an annular guide groove formed in a circumferential direction. Valve members each having a seal member mounting groove formed therein, an annular seal member mounted in each of the seal member mounting grooves, A valve shaft protruding outward from the body, a valve shaft guide for guiding the movement of the valve shaft in the fluid passage, and a pin having one end inserted into the guide groove of the valve body, An actuator for moving the pin. A three-way valve, wherein the size of the fluid passage is adjusted or the flow direction of the fluid is changed by sliding the valve body by a force applied to the pin from the valve. 7. The three-way valve according to claim 6, wherein a spring member is interposed between the valve body and the valve shaft guide in a compressed state.