JPH07301347A - Rotary type fluid opening/closing valve - Google Patents

Abstract

PURPOSE:To provide miniaturization further with a simple constitution, in a rotary type fluid opening/closing valve whose rotary torque is decreased and flow amount can be also adjusted. CONSTITUTION:An elastic material seal ring 5 is fitted to be inserted to an eccentric core part 4a of a rotary shaft 4 and brought into press contact with an internal side surface of a cylinder 2. A cylindrical body 1 is a cylindrical shape sealing both ends of the cylinder 2 with covers 3a, 3b, and by removing the upper cover 3a of the cylindrical body 1, inserting both ends of the rotary shaft 4 fitted to center holes 3a1, 3b1 of the upper/lower covers and by fixing the cover to the cylinder 2, a rotary type fluid opening/closing valve V is formed. Fluid circulating ports 2a, 2b are provided in a side wall of the cylinder 2. When the elastic material seal ring 5 is turned to press close one of the fluid circulating ports, a flow of fluid is closed. When the elastic material seal ring 5 is turned to perform no press closing, the fluid is allowed to flow. By turning a little the elastic material seal ring 5 from a completely closed condition, a flow amount of fluid can be controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid on-off valve,
In particular, the present invention relates to an on-off valve that has a small rotational torque when switching between open and close and that can finely adjust the opening.

[0002]

2. Description of the Related Art A fluid on-off valve is installed in a pipe and is widely used for distribution, shutoff, flow rate control, etc. of fluid supplied to the pipe. It is generally required that the device be small in size, have a simple structure, be inexpensive, and control the flow rate. Conventionally, as this type of fluid on-off valve, for example, a ball valve,
There are butterfly valves and poppet valves. The ball valve is inside a predetermined valve casing having an inlet and an outlet,
This is a valve that accommodates a spherical valve body having a flow passage formed in the center thereof and is opened and closed by the rotation of the spherical valve body. Further, the butterfly valve is a valve that is provided with a circular plate attached to a rotary shaft provided inside a predetermined valve casing so as to cross the flow path, and the rotary shaft is rotated to open and close the circular plate. Further, the poppet valve is a valve of a type in which a valve body is vertically crimped onto a valve seat and the valve body is operated by electromagnetic force or the like to open and close a gas flow path.

[0003]

However, in the above ball valve, the pressure of the control fluid causes the valve body to be pressed against the sealing surface to close the fluid, and the opening and closing operation is performed while pressing, so that this force is overcome. It is necessary to open and close the valve with greater force. Further, the butterfly valve is required to rotate while the valve body pushes and spreads the sealing surface at the time of closing operation to rotate the valve element to a predetermined closed position. Therefore, opening and closing of the valve requires a driving means having a large rotational torque, resulting in an increase in the size of the entire valve mechanism.
There is a problem that the price of the valve rises.

Further, since the ball valve controls the fluid flow rate, when the valve state is set to the slightly opened state, the valve seal may be dragged into the slightly opened portion due to the flow velocity of the fluid.
Generally, it cannot be used for such a flow rate control, and the butterfly valve has a problem that the valve opening amount is large with respect to the valve slight opening angle and the flow rate control cannot be performed due to its valve closing mechanism.

Further, in the poppet valve, since the valve body is vertically crimped to the valve seat, the pressure of the control fluid is directly applied to the valve body, and the force required for opening and closing the valve body increases with the control pressure. Or, a mechanism such as a pilot valve is used.
Therefore, there is a problem that the valve structure is large and complicated and the price is high. Also, because of its structure, the flow rate of the fluid is adjusted,
That is, flow rate control is impossible. The present invention solves the above problems, and an object of the present invention is to provide a rotary fluid on-off valve that can control the flow rate, has a small rotational torque, is small in size, has a simple configuration, and is inexpensive.

[0006]

In order to achieve the above object, the structural features of the invention according to claim 1 are: a cylindrical tubular body having both ends sealed with a lid, and a cylindrical tubular body. At the central axis position of the body, a rotary shaft penetrating the lid, and a rolling bearing fitted and fixed in the cylindrical body at a position eccentric to the rotary shaft in parallel with the axis, A cylindrical elastic seal ring fitted and fixed to the outer ring of the rolling bearing is provided, and the elastic seal ring is pressed into contact with the inner surface of the cylindrical body in the cylindrical body and integrated with the rotary shaft. A valve body that rotates in a vertical direction and two fluid circulation ports on the side wall of the tubular body are provided. By rotating the elastic body seal ring, one of the fluid circulation ports is closed by pressure and The elastic seal ring and the front part that come into contact with the pressurized fluid when supplied to the tubular body Rotating shaft, the same pressurized fluid,
This is to prevent the rotation and rotation movements from being blocked.

Further, the structural feature of the invention according to claim 2 is that it has a cylindrical tubular body with both ends sealed by lids.
A rotary shaft penetrating the lid at a central axis position of the cylindrical body, and a rolling bearing fitted and fixed in the cylindrical body at a position eccentric to the rotary shaft parallel to the axis. A cylindrical elastic seal ring fitted and fixed to the outer ring of the rolling bearing is provided, and the elastic seal ring is pressed into contact with the inner surface of the cylindrical body in the cylindrical body and integrated with the rotary shaft. Provided with three or more fluid flow ports on the side wall of the tubular body, and at least one of the fluid flow ports is pressed and closed by the rotation of the elastic seal ring. When the pressurized fluid is supplied to the tubular body, the elastic seal ring and the rotating shaft that come into contact with the pressurized fluid are prevented from being prevented from rotating and rotating by the pressurized fluid. is there.

[0008]

The operation and effect of the present invention is as follows.
In the invention according to, the elastic seal ring fitted and fixed by the bearing at a position eccentric to the axis of the rotary shaft rolls in accordance with the rotation of the rotary shaft while being pressed against the inner surface of the tubular body. . Further, two fluid circulation ports are provided on the side wall of the tubular body. The elastic seal ring covers the one or two fluid flow ports under pressure,
The fluid flow is cut off and the valve action is performed. When the fluid is supplied from the fluid circulation port into the tubular body, the pressure of this fluid acts uniformly on the elastic seal ring, so that no force that hinders the rotation of the rotary shaft is generated. The rotation torque of can be made very small.

Further, in the rotary fluid on-off valve of the present invention, the elastic seal ring, which is the valve body, rotates and covers the fluid flow port by pressure contact, so that the valve body is rotated to completely close the valve action. Since it is easy to make a slightly opened state and the opening can be finely adjusted, the range of use of the rotary fluid on-off valve can be widened.

In the invention according to claim 2 configured as described above, the operation and effect of the invention according to claim 1 are provided, and at least three fluid circulation ports are provided on the side surface of the tubular body. It has an application as a fluid flow path switching valve, and can widen the use envelope of a rotary fluid on-off valve.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 schematically show a rotary fluid on-off valve according to a first embodiment of the present invention. The rotary fluid on-off valve V is provided with a tubular body 1 including a cylindrical tubular body 2 and lids 3a and 3b provided on both end surfaces of the tubular body 2. The cylindrical body 2 is made of metal, synthetic resin, or the like, and has side walls provided with fluid passage holes 2a and 2b as shown in FIG. 2, and a plurality of fixing holes at both ends. A screw hole 2c is provided.

The lids 3a and 3b are made of metal, synthetic resin or the like, and through holes 3a1 and 3b1 for inserting a rotary shaft 4 which will be described later are provided at the centers thereof.
1, 3b1 are provided with bearings 3a2, 3b2 and sealing packings 3a3, 3b3. Lids 3a, 3
In b, a plurality of holes 3c corresponding to the screw holes 2c of the cylinder 2 are provided.
Is provided, and is fixed to the cylinder body 2 by inserting a bolt into the hole 3c and screwing the bolt into the screw hole 2c of the cylinder body 2. Then, in the cylindrical body 1, an elastic body seal ring 5 attached to the rotary shaft 4 which will be described later is arranged together with the rolling bearing 6.

The elastic body seal ring 5 is fitted and fixed to the outer ring 6a of the rolling bearing 6 which is fitted and fixed to the eccentric portion 4a of the rotary shaft 4, and the outer circumference of the elastic body seal ring 5 is inside the tubular body 2. It is pressed against the circumference. Then, with the rotation of the rotating shaft 4, the elastic seal ring 5 rotates while pressing the inner surface of the cylindrical body 2 in pressure contact.

Next, the assembly of the rotary fluid on-off valve V will be described. First, the rolling bearing 6 is press-fitted into the eccentric portion 4a of the rotary shaft 4, and the outer ring 6a of the rolling bearing 6 is further inserted.
Attach the elastic seal ring 5 to the. Then, with the upper lid 3a of the tubular body removed, one end of the rotary shaft 4 with the elastic seal ring 5 attached is fitted into the hole 3b1 of the lower lid 3b. Next, the other end of the rotary shaft 4 is fitted into the hole 3a1 of the upper lid 3a, and the upper lid 3a and the lower lid 3b are fixed to the upper end surface and the lower end surface of the tubular body 2 by bolts. In the rotary fluid on-off valve V assembled in this way, as shown in FIG. 2, the elastic seal ring 5 closes the fluid flow port 2b of the cylindrical body 2 and therefore flows in from the fluid flow port 2a. The pressurized fluid is closed. Also, the elastic seal ring 5
Since is mounted on the rotary shaft 4 through the rolling bearing 6, the friction with the tubular body 2 is also small, and the rotation of the rotary shaft 4 is not burdened. Moreover, since the fluid pressure is uniformly applied to the elastic body seal ring 5 from the entire circumference except for the pressure-closed portion, no force that hinders the rotation is generated.

Next, the operation of the rotary fluid on-off valve V constructed as described above will be described. First, the elastic seal ring 5 is closed as shown in FIG. 2, and the fluid is pressurized from a fluid supply source (not shown) through a supply pipe (not shown) connected to the fluid circulation port 2a. At this time, the pressure of the pressurized fluid is applied to the entire circumference of the elastic seal ring 5 except for the pressure contact portion. Therefore, the elastic seal ring 5 is not rotated by this pressure. Then, the elastic seal ring 5 is rotated by a driving means (not shown) connected to the rotary shaft 4,
The rotary fluid on-off valve V is opened as shown in FIG. At this time, the force of the pressurized fluid is uniformly applied to the elastic body seal ring 5. Therefore, the elastic seal ring 5
When rotating together with the rotary shaft 4, the pressurized fluid does not generate a force that hinders this rotation. Therefore, the rotational torque of the rotary shaft 4 is very small because it is necessary only to compress the pressure contact portion of the elastic seal ring 5.

As described above, the rotary fluid on-off valve according to this embodiment can make the rotational torque much smaller than that of the conventional valve, so that the shape of the rotary fluid on-off valve itself can be reduced. Can also be smaller. Furthermore, this rotary fluid on-off valve has a simple structure consisting only of a valve body consisting of a rolling bearing fitted in a rotary shaft and an elastic seal ring, and a tubular body, and therefore, compared to conventional fluid on-off valves. , Can be supplied at low cost. Further, since the sealing mechanism of this rotary fluid on-off valve is a rolling pressure closing mechanism, it is possible to perform minute control of the opening of the valve, and this rotary fluid on-off valve can also control the flow rate of fluid. Furthermore, this rotary fluid on-off valve can be used as a multi-channel valve because three or more fluid circulation ports can be provided on the side wall of the cylindrical body.

Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the cylindrical body 2
Is provided with three or more fluid circulation ports 2a, 2b, 2c. For example, in the state of FIG. 5, the fluid flows from the fluid circulation ports 2a to 2c, and in the state of FIG. 6, it flows from the fluid circulation ports 2a to 2b. This makes it possible to easily form a rotary fluid opening / closing valve for multiple channels.

[0018]

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a rotary fluid on-off valve according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state where the upper lid of the rotary fluid on-off valve is removed and the valve is in a closed state.

3 is a sectional view taken along line II-II of FIG.

FIG. 4 is a plan view showing a state in which an upper lid of the rotary type fluid on-off valve same as that shown in FIG. 2 is removed, and an elastic seal ring which is a valve body is rotated to open the valve.

FIG. 5 is a plan view showing a state where the upper lid of the rotary fluid on-off valve according to the second embodiment is removed.

FIG. 6 is a view showing a state in which the upper lid of the rotary fluid on-off valve according to the second embodiment, which is the same as that of FIG. 5, is removed, and the elastic seal ring, which is the valve body, is rotated and the valve is switched. FIG.

[Explanation of symbols]

1; Cylindrical, 2; Cylindrical, 2a, 2b, 2c; Fluid distribution port, 3a, 3b; Lid, 4; Rotating shaft, 4a;
Eccentric part of rotary shaft, 5; Elastic seal ring, 6; Rolling bearing, 6a: Outer ring of rolling bearing, V: Rotary fluid on-off valve

Claims (2)

[Claims] 1. A cylindrical tubular body having both ends sealed with lids, a rotary shaft penetrating through the lid at a central axis position of the cylindrical body, and the inside of the cylindrical body. And a cylindrical elastic body seal ring fitted and fixed to the outer ring of the rolling bearing. The elastic body seal ring is provided with a valve body that is pressed against the inner surface of the cylindrical body to rotate integrally with the rotary shaft, and two fluid circulation ports on the side wall of the cylindrical body. When the seal ring is rotated to close one of the fluid flow ports and the pressurized fluid is supplied to the tubular body, the elastic seal ring and the rotating shaft that come into contact with the pressurized fluid are Fine adjustment of the opening, which is characterized in that the pressurized fluid does not prevent rotation and rotation. Possible rotary fluid on-off valve. 2. A cylindrical tubular body having both ends sealed with a lid, a rotary shaft penetrating the lid at a central axis position of the cylindrical body, and the inside of the cylindrical body. And a cylindrical elastic body seal ring fitted and fixed to the outer ring of the rolling bearing, the rolling bearing being fitted and fixed at a position eccentric to the rotary shaft in parallel with the axis. The elastic body seal ring is provided with a valve body that is pressed against the inner surface of the cylindrical body and rotates integrally with the rotary shaft, and three or more fluid circulation ports on the side wall of the cylindrical body. By rotating the body seal ring, at least one of the fluid circulation ports is closed by pressure, and when the pressurized fluid is supplied to the tubular body, the elastic body seal ring and the rotating body which come into contact with the pressurized fluid The shaft is characterized by the fact that the pressurized fluid does not prevent the shaft from rotating or rotating. Convertible fluid on-off valve.