JPH07190217A - Directional control valve device - Google Patents

Abstract

PURPOSE:To provide a directional control valve device without a liquid reservoir by devising it so that a valve element rotationally slides against a case between a columnar surface of the valve element and a circular arc sliding surface formed in a chamber of the case. CONSTITUTION:A resin made blocking member 18 having a circular arc sliding surface 18a facing against a columnar surface 16b of a valve element 16 is arranged in a fourth port 19 of a case 15. A circular arc sliding surface 14a facing against the columnar surface 16b of the valve element 16 is formed at a position between each of the first-fourth ports 11-13, 19 adjacent to each other in a chamber 14 of a case 15. The valve element 16 rotates and slides against the case 15 between the columnar surface 16b of the valve element 16 and the circular arc sliding surface 14a facing against the columnar surface 16b formed in the chamber 14 of the case 15. Consequently, fluid supplied from the first port 11 constantly and selectively flows out to the second port 12 or the third port 13 through an L letter channel hole 16a of the valve element 16. Additionally, intrusion of fluid to the fourth port 19 is prevented by the blocking member 18 having the circular arc sliding surface 18a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device, and more particularly to a switching valve having no liquid pool.

[0002]

2. Description of the Related Art In the pharmaceutical industry, food industry, coating industry, etc., a switching valve is provided in a flow path through which a fluid used for manufacturing a product passes. The flow valve is shut off and the flow path is changed by operating the switching valve. FIG. 5 shows a switching valve device used for controlling such a fluid. The illustrated switching valve device 100 includes a first port 110, a second port 111, and a chamber 1 that connects the first port 110 and the second port 111.
A case 101 having 12 and a through hole 102a,
The spherical valve body 102 is provided in the chamber 112 of the case 101 and controls the flow of the fluid flowing in from the first port 110 to the second port 111. The case 101 has a case body 103 and an auxiliary case 104 fitted into the case body 103, and the auxiliary case 104 is fixed to the case body 103 by bolts 105.
Further, the auxiliary case 104 forms a chamber 112 together with the case body 103. The packing 106 disposed in the chamber 112 abuts the valve body 103,
Prevents leakage of fluid inside. The case body 103 is provided with a support hole 113 that reaches the chamber 112 from the outside. A control member 114 is rotatably arranged in the support hole 113. The inner end of the control member 114 is connected to the valve body 102. A connecting portion 115 is provided at the outer end of the control member 114. A packing 116 is arranged in the support hole 113 around the control member 114. Since the through hole 102a of the valve body 102 is rotated by rotating the control member 114, the valve body 102 can be switched between the valve opening position and the valve closing position.

[0003]

By the way, in the conventional switching valve device shown in FIG. 5, a gap 117 is formed around the spherical valve body 102, and the fluid flows into the gap 117 when the valve body 102 is opened and closed. When the valve body 102 is in the completely opened or closed state, the fluid once flowing into the gap 117 is sealed and is blocked from both the first port 110 and the second port 111. Therefore, the fluid remains in the liquid pool 118 of the chamber 112 formed around the valve body 102. For example, when the paint stays in the gap 117, it gradually solidifies and inhibits the rotation of the valve body 102. Moreover, the foodstuffs retained in the gap 117 may cause spoilage. Further, in the case of a chemical in which a precise mixing ratio is required or contamination of impurities should be avoided, unpredictable contamination of the retained fluid is fatal. However, when the residual fluid in the liquid pool deteriorates with the passage of time and then flows out of the switching valve device, the quality of the product is deteriorated or deteriorated, and in the case of food, there is a drawback of spoilage. Further, in the case of a sticky liquid such as paint, there is a drawback that it becomes difficult to drive the switching valve device due to solidification in the liquid pool 118. Further, the chamber 112 of the case 101 is provided with a spherical valve body 102.
Although it is possible to completely eliminate the liquid pool 118 by making it have the same shape as the outer shape, there is a drawback that strict machining accuracy is required and the structure becomes complicated. Therefore, there has been a demand for development of a liquidless (pocketless) switching valve device for these wide-ranging applications.

Therefore, an object of the present invention is to provide a switching valve device which does not have a liquid pool.

[0005]

A switching valve device according to the present invention includes a case having a plurality of ports and a chamber communicating between the plurality of ports, and at least one rotatably arranged in the chamber of the case. And a valve body for controlling the flow of the fluid flowing from the port to the other port. The switching valve device of the present invention includes a cylindrical valve body rotatably supported in a support hole formed in a case and having a fluid passage hole, and an inner peripheral portion of the support hole of the case or the support hole. A seal member provided on the outer peripheral portion of the valve body facing the inner peripheral portion, a plurality of blocks having ports communicating with the chamber and fixed to each port of the case, and facing the cylindrical surface of the valve body and An arc-shaped sliding contact surface formed at a position between a plurality of ports adjacent to each other in the chamber of the case, and a fluid flowing from at least one port depending on the rotational position of the valve body is used as a flow path of the valve body. Selectively flow out to other ports through holes. In the embodiment of the present invention, the seal member is provided between the plurality of blocks and the case, and the valve body is L-shaped.
It has a V-shaped channel hole. The flow passage hole of the valve body may be I-shaped, and the plurality of blocks may be screwed to the case. Further, in the illustrated embodiment, a guide cap for guiding the connecting portion of the actuator that engages with the fitting portion provided at the end portion of the valve body is provided.

[0006]

Since the valve body rotatably slides with respect to the case between the cylindrical surface of the valve body and the arcuate sliding contact surface formed in the chamber of the case, one valve can be moved from one port depending on the rotational position of the valve body. The inflowing fluid is always selectively outflowed to other ports via the flow passage hole of the valve body. Therefore, since there is no liquid pool (pocket), new fluid is constantly supplied through the switching valve device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a switching valve device according to the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, the switching valve device 10 according to the present invention has first to fourth ports 11 to 13, 19 and first to fourth ports 11 to 1.
Case 1 with chamber 14 that connects between 3 and 19
5 and an L-shaped flow passage hole 16a, and is rotatably arranged in the chamber 14 of the case 15, and the first port 11
Valve body 16 for controlling the flow of the fluid flowing in from the second or third port 12, 13. The valve body 16 is formed in a cylindrical shape, and is rotatably supported by a resin bush 17 and a support member 18 in the support hole 15 a of the case 15. Valve body 1 facing the inner periphery of the support hole 15a
An O-ring 21 as a seal member is provided on the outer peripheral portion of 6, and the support hole 15 a of the case 15 and the cylindrical surface 1 of the valve body 16 are
It prevents the fluid from leaking out from a slight gap between 6b and 6b. A first block 51 having a first port 11 communicating with the chamber 14 is fixed to the case 15 by a bolt 54, and a second port 12 communicating with the chamber 14 is fixed.
And a third block 53 having a third port 13 communicating with the chamber 14
Bolts 54 to the case 15 at right angles to the block 51 of
It is fixed by. A blind plate 55 is fixed by bolts 54 to the fourth port 19 side of the case 15 facing the first block 51. Inside the fourth port 19 of the case 15, a resin closing member 18 having an arcuate sliding contact surface 18a facing the cylindrical surface 16b of the valve body 16 is arranged. An arc-shaped sliding contact surface 14a facing the cylindrical surface 16b of the valve body 16 is formed at a position between the first to fourth ports 11 to 13 and 19 adjacent to each other in the chamber 14 of the case 15. There is. At the upper end of the valve body 16,
Fitting protrusion 16c that engages with a connecting portion (not shown) of the pneumatic, hydraulic or electric actuator that rotationally drives the valve body 16
Is formed, and a guide cap 28 that guides the connecting portion of the actuator is provided around the fitting protrusion 16c. Resin seal members 23 to 25 are provided between the first to third blocks 51 to 53 and the case 15, respectively.

In the above-mentioned structure, as shown in FIG. 1, when the L-shaped through hole 16a of the cylindrical valve body 16 is in a position for connecting the first port 11 and the second port 12,
The fluid supplied from the first port 11 passes through the L-shaped through hole 16 a of the valve body 16 and flows out to the second port 12. When the valve body 16 is rotated clockwise by 90 degrees from the state of FIG. 1 to switch the L-shaped through hole 16a to a position for connecting the first port 11 and the third port 13, the first port 11 The fluid supplied from the above flows out to the third port 12 via the L-shaped through hole 16a of the valve body 16.

In this embodiment, the cylindrical surface 16b of the valve body 16 is
And a cylindrical surface 16 formed in the chamber 14 of the case 15
b between the arc-shaped sliding contact surface 14a and the valve body 16
Is rotated and slid with respect to the case 15, the fluid supplied from the first port 11 is always selected to the second or third port 12, 13 via the L-shaped passage hole 16a of the valve body 16. Be leaked. Also, the fourth port 1 of the case 15
By the closing member 18 which is disposed in the inner space 9 and has an arcuate sliding contact surface 18a facing the cylindrical surface 16b of the valve body 16,
The fluid is prevented from entering the fourth port 19. Therefore, there is no liquid pool (pocket) and no fluid remains in the chamber 14. Therefore, a new fluid can be constantly supplied through the switching valve device 10, and the valve body 16 of the switching valve device 10 can be used even when the fluid is a liquid such as paint that has a sticking property.
Can always be driven smoothly. Further, since the valve body 16 is formed in a cylindrical shape, the case 1 is compared with the case of the spherical valve body.
The structure of 5 can be simplified.

The embodiment of the present invention is not limited to the above-mentioned embodiment, and can be modified. For example, in the above embodiment, an example in which the first to third blocks 51 to 53 are fixed to the case 15 by the bolts 54 is shown, but the protruding portions of the first to third blocks 51 to 53 on the case 15 side. Alternatively, a male screw may be provided on the outer peripheral portion of the case 15 and a female screw may be provided on the inner peripheral portion of the case 15 near the inlet of the chamber 14 to screw-connect the first to third blocks 51 to 53 to the case 15. The O-ring 21 may be provided on the inner peripheral portion of the support hole 15 a of the case 15. Further, in the above embodiment, the first to third blocks 5
1 to 53 and the blind plate 55 are respectively fixed to the case 15 by the bolts 54 and used as a three-way (3-WAY) valve, the blind plate 55 and the closing member 18 are shown as shown in FIG.
Alternatively, a fourth block 56 and a sealing member 26 may be provided and used as a 4-way (4-WAY) valve. In the embodiment shown in FIG. 3, the flow passage hole 16a of the valve element 16 is I-shaped, and the connection between the first port 11 and the fourth port 19 and the connection between the second port 12 and the third port 19 are used. Port 13
Although it is configured to be switchable between connection and disconnection, a valve body having an L-shaped passage hole can also be used depending on the purpose of use. Further, as shown in FIG. 4, it can be applied to a two-way (2-WAY) valve. Further, the present invention is not limited to the switching valve device of 2 to 4 directions, but can be applied to the switching valve device of 5 or more directions.

[0011]

According to the present invention, since there is no liquid pool (pocket), no fluid remains in the chamber, and it is possible to constantly supply a new fluid through the switching valve device. Therefore, when the fluids are mixed, it is possible to mix the fluids at a precise ratio, and it is possible to avoid mixing impurities into the fluids. Further, even if the fluid is a sticky liquid such as paint, the paint does not remain in the chamber, so that the valve body of the switching valve device can be driven smoothly at all times. Further, it has an advantage that it has a simple structure and can be widely applied in the industrial field handling fluid as a pocketless multidirectional switching valve.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing an embodiment of a switching valve device according to the present invention.

FIG. 2 is a front sectional view of the switching valve device of FIG.

FIG. 3 is a plan sectional view showing an example applied to a switching valve device having four ports.

FIG. 4 is a plan sectional view showing an example applied to a switching valve device having two ports.

FIG. 5 is a sectional view showing a conventional switching valve device.

[Explanation of symbols]

10. ． ． Switching valve device, 11-13. ． ． First to third ports, 14. ． ． Chamber 14a. ． ． Sliding surface, 1
5. ． ． Case, 15a. ． ． Support holes, 16. ． ． A valve body, 16a. ． ． Channel holes, 16b. ． ． Cylindrical surface, 2
1. ． ． O-ring, 23-25. ． ． Seal member, 2
8. ． ． Guide cap 51-53. ． ． First to third
Block of

Claims (6)

[Claims] 1. A case comprising a plurality of ports and a chamber communicating between the plurality of ports, and a flow of fluid inflowing from at least one port and rotatably disposed in the chamber of the case to another port. In a switching valve device including a valve body for controlling a valve, a cylindrical valve body rotatably supported in a support hole formed in a case and having a fluid passage hole formed therein, and a support hole of the case A seal member provided on the outer peripheral portion of the valve body facing the inner peripheral portion or the inner peripheral portion of the support hole, a plurality of blocks having ports communicating with the chamber and fixed to each port of the case, A fluid flowing in from at least one port depending on the rotational position of the valve body, which has an arcuate sliding contact surface formed at a position between a plurality of adjacent ports in the chamber of the case that face the cylindrical surface and are adjacent to each other. The valve body Switching valve device, characterized in that via the channel hole selectively efflux the other ports. 2. The switching valve device according to claim 1, wherein a seal member is provided between the plurality of blocks and the case. 3. The switching valve device according to claim 1, wherein the valve body has an L-shaped flow passage hole. 4. The switching valve device according to claim 1, wherein the valve body has an I-shaped flow passage hole. 5. The switching valve device according to claim 1, wherein the plurality of blocks are screw-connected to the case. 6. The switching valve device according to claim 1, further comprising a guide cap that guides a connecting portion of an actuator that engages with a fitting portion provided at an end portion of the valve body.