JP2974623B2 - Flow control valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control valve capable of adjusting a flow rate by rotating an adjusting nut, and more particularly to a flow control valve capable of securely fixing the adjusted flow rate.

[0002]

2. Description of the Related Art Conventionally, flow rate adjustment by a slow start valve, a speed controller, and the like has been performed by rotating a valve body and moving the valve body up and down with respect to a valve seat. In order to reliably fix the adjusted flow rate, a tool for fixing the lock nut has been used. For example, in a speed controller 100 shown in FIG. 12, an adjustment knob 101 and a lock nut 102 each having an internally threaded inside are fitted into a needle guide 103 having an externally threaded outside. Is rotated, the valve body incorporated in the main body 104 moves up and down with respect to the valve seat to adjust the flow rate.
The adjusted flow rate was fixed by tightening the 02 with a tool until it came into contact with the adjustment knob 101.

[0003]

However, in the pneumatic device line having a large number of slow start valves, speed controllers, etc., tools suitable for each specification are individually prepared or a large number of tools are maintained. As a result, there has been a problem that an extremely troublesome operation is required.

Accordingly, the present invention has been made to solve the above-mentioned problems, and the adjusted flow rate can be reliably fixed by simply locking the adjusting nut without using a tool. At the same time, an object of the present invention is to provide a flow control valve capable of visually confirming a locked state.

[0005]

According to a first aspect of the present invention, there is provided a flow control valve for adjusting a position of a throttle valve in a cylinder by rotation of an adjusting nut. And a recess provided around the adjusting nut, a slide key provided with a protrusion fitted and disengaged from the recess, and a guide groove for guiding the slide key, wherein the slide key slides. Then, the protrusion of the slide key is fitted into the recess of the adjusting nut, thereby preventing rotation of the adjusting nut and fixing the position of the throttle valve.

In the flow control valve having such a configuration, in order to adjust and reliably fix the flow rate, the position of the throttle valve in the cylinder (ie, the flow rate) is adjusted by rotating an adjusting nut. Thereafter, the slide key is slid while being guided by the guide groove, and the projection of the slide key is fitted into the recess of the adjusting nut. Thus, the adjusting nut can be easily locked without using a tool. Further, the state of the locked adjusting nut can be easily determined. Further, when the slide key is slid in the opposite direction, the convex portion of the slide key comes out of the concave portion of the adjusting nut, and the adjusting nut can rotate, so that the position of the throttle valve in the cylinder (ie, Flow rate) can be readjusted.

A flow control valve according to a second aspect is the flow rate control valve according to the first aspect, wherein the arm portion is provided on both sides of the slide key and the arm portion is provided on the arm portion. A claw portion for pressing against the guide groove, wherein the claw portion of the arm portion is locked to the open end of the guide groove when the protrusion of the slide key is fitted into the recess of the adjusting nut. It is characterized by the following.

In the flow control valve having such a configuration,
When the convex portion of the slide key fits into the concave portion of the adjusting nut and the adjusting nut is locked, the claw portion of the arm portion of the slide key is locked to the open end of the guide groove. As a result, the convex portion of the slide key does not slide out of the concave portion of the adjusting nut due to vibration or the like, so that the locking of the adjusting nut is not inadvertently released. Further, since the claw portion of the arm portion of the slide key is pressed against the guide groove, the slide key is fixed in the guide groove when the projection of the slide key is not fitted into the concave portion of the adjusting nut. As a result, the protrusion of the slide key does not slide due to vibration or the like in the direction in which the protrusion is fitted into the recess of the adjusting nut, so that the locking of the adjusting nut is not carelessly performed.

The flow control valve according to claim 3 is the flow control valve according to claim 1 or 2, wherein the stopper portion fixed to the slide key and the cylinder on the lot side of the throttle valve. And an opening formed in the guide groove while communicating with the outside, the stopper of the slide key, through the opening,
The stopper is prevented from being released from the guide groove and coming out of the throttle valve to the lot side by being provided inside the lot side of the cylinder of the throttle valve.

In the flow control valve having such a configuration,
A stopper portion provided inside the cylinder and a slide key provided outside the cylinder are integrated via an opening formed in the guide groove. Therefore, since such a stopper portion is always located on the lot side of the cylinder of the throttle valve, the throttle valve cannot escape from the lot side to the outside. Further, even if the slide key is to be removed from the guide groove, the stopper of the slide key and the opening of the guide groove interfere with each other, so that the slide key can be reliably prevented from coming off the guide groove.

According to a fourth aspect of the present invention, there is provided a flow control valve according to any one of the first, second and third aspects, wherein the throttle valve has a square shape.

In the flow control valve having such a configuration,
Even if the adjusting nut is rotated to adjust the position (that is, the flow rate) of the throttle valve in the cylinder, the throttle valve itself does not rotate with the rotation of the adjusting nut. Thereby, the position of the throttle valve in the cylinder (that is, the flow rate) can be surely adjusted by the rotation of the adjusting nut.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a flow control valve according to the present invention is used as a throttle valve of a slow start valve will be described below with reference to the drawings. FIG. 11 is a sectional view of a slow start valve using the flow control valve according to the present invention. As shown in FIG. 11, a slow start valve 1 includes a slide valve 6 having a manual rotary knob 5 as an operation switch, an inlet 2 connected to an air pressure source side, and an outlet connected to an air pressure device side. 3, outlet 4, flow path 7,
A flow control valve 40 and the like are provided.

When the operation of the pneumatic device connected to the slow start valve 1 is started, the slide valve 6 is slid by the rotation of the manual rotary knob 5 to open the flow path 7.
Thereafter, when the pneumatic device is started, a small amount of the compressed air flowing into the inflow port 2 flows out of the outflow port 3 and the compressed air is supplied gently into the pneumatic device.
At this time, the compressed air flowing out from the outlet 3 is passing through the flow control valve 40. Then, when the time required for the air pressure in the pneumatic device to reach a certain level elapses, the normal flow rate of the compressed air flowing into the inflow port 2 flows out of the outflow port 3. The adjustment of the time is performed by adjusting the flow rate of the compressed air passing through the flow control valve 40. The details of the operation of each component of the slow start valve 1 will be omitted. 1 and 2 show such a flow control valve 4.
FIG. 2 is a view of the cylinder block 9 (shaded portion) of the slow start valve 1 having 0 as viewed from an arrow A. FIGS. 3 and 4 are enlarged cross-sectional views of the flow control valve 40 used in the slow start valve 1.

As shown in FIGS. 1, 2, 3 and 4, the flow control valve 40 used for the slow start valve 1 is
It has an adjusting nut 20, a slide key 30, a throttle valve 43, etc., a guide groove 10 provided in a cylinder block 9 of the slow start valve 1, an opening 1
1, a structure attached to the cylinder 12 and the like.
Here, adjusting nut 20, slide key 3
0, the throttle valve 43 will be described with reference to FIGS. FIG. 5 is a top view of the adjusting nut 20, and FIG. 6 is a side view of the adjusting nut 20. FIG. 7 is a front view of the slide key 30, and FIG. 8 is a side view of the slide key 30. FIG. 9 is a front view of the throttle valve 43, and FIG. 10 is a bottom view of the throttle valve 43.

As shown in FIGS. 5 and 6, a recess 21 is provided on the outer periphery of the adjusting nut 20, and a female screw 22 is formed on the inner periphery of the adjusting nut 20. As shown in FIGS. 7 and 8, a projection 31 that can be fitted into and removed from the recess 21 of the adjusting nut 20 is provided below the slide key 30. On both sides of the slide key 30, an arm 32 having a claw 33 at the tip is provided. On the front side of the slide key 30, a non-slip 36 is provided.
A columnar stopper 34 is fixed to the rear surface of the slide key 30 via a plate-like connecting portion 35.
Further, as shown in FIGS. 9 and 10, on the lot side of the throttle valve 43, a male screw 41 to be fitted in the female screw 22 of the adjusting nut 20 is provided. Further, the valve element 42 of the throttle valve 43 has a square shape.

Next, the adjusting nut 20, the slide key 30, and the throttle valve 43 are provided in the guide groove 1 provided in the cylinder block 9 of the slow start valve 1.
0, the opening 11, and the structure attached to the cylinder 12 will be described with reference to FIGS. As shown in FIGS. 3 and 4, the adjusting nut 20 is fitted in a lot of the throttle valve 43 provided in the cylinder 12, and the rotation of the adjusting nut 20 causes the position of the throttle valve 43 in the cylinder 12 to be changed. (Ie, the flow rate) can be adjusted up and down. Also,
As shown in FIGS. 1 and 2, a slide key 30 is attached to the guide groove 10. At this time, the slide key 30 and the stopper 3 are provided in the opening 11 formed in the guide groove 10.
The stopper portion 34 of the slide key 30 is loosely fitted into the cylinder 12 on the lot side of the throttle valve 43.

When adjusting the flow rate with the flow control valve 40,
As shown in FIGS. 2 and 4, the slide key 30 is slid upward so that the protrusion 31 of the slide key 30 is not fitted into the recess 21 of the adjusting nut 20. Thereby, the adjusting nut 20 can be rotated, and the position (that is, the flow rate) of the throttle valve 43 in the cylinder 12 can be adjusted. At this time, since the claw portion 33 of the arm portion 32 of the slide key 30 is pressed against the side surface of the guide groove 10, the position of the slide key 30 is fixed in the guide groove 10.

To reliably fix the flow rate adjusted by the flow control valve 40, the slide key 30 is slid downward as shown in FIGS.
Of the adjusting nut 20 is fitted into the concave portion 21 of the adjusting nut 20. As a result, the adjusting nut 20 cannot be rotated, and the claw 33 of the arm 32 of the slide key 30 is locked at the open end of the guide groove 10, so that the slide key 30 moves. Therefore, the position (that is, the flow rate) of the throttle valve 43 in the cylinder 12 can be reliably fixed.

As shown in FIGS. 3 and 4, in the cylinder 12, the stopper portion 34
Of the throttle valve 43
Can be prevented from coming out to the lot side. Further, since the stopper portion 34 inside the cylinder 12 and the slide key 30 outside the cylinder 12 are integrated via the opening 11 formed in the guide groove 10, the slide key 3
0 cannot be detached from the guide groove 10. further,
Since the valve body 42 of the throttle valve 43 has a square shape, the throttle valve 43 itself does not rotate with the rotation of the adjusting nut 20.

As described in detail above, the flow control valve 4
At 0, to adjust the flow rate and fix it securely,
The rotation of the adjusting nut 20 causes the cylinder 1
Position of throttle valve 43 in 2 (that is, flow rate)
Is adjusted, and then the slide key 30 is slid while being guided by the guide groove 10, so that the protrusion 31 of the slide key 30 is
Into the concave portion 21 of the adjusting nut 20 (see FIGS. 1 and 3). Thus, the adjusting nut 20 can be easily locked without using a tool. Further, the situation of the locked adjusting nut 20 can be easily determined. Further, the slide key 30 is moved in the opposite direction (FIGS. 1, 3, and 11).
(In the upward direction), the protrusion 31 of the slide key 30 comes out of the recess 21 of the adjusting nut 20, and the adjusting nut 20 can rotate (see FIGS. 2 and 4). The position (that is, the flow rate) of the throttle valve 43 in the cylinder 12 can be readjusted.

When the convex portion 31 of the slide key 30 is fitted into the concave portion 21 of the adjusting nut 20 and the adjusting nut 20 is locked (see FIGS. 1 and 3), the arm portion of the slide key 30 is moved. 32 are engaged with the open end of the guide groove 10, and the protrusion 31 of the slide key 30 is pulled out from the recess 21 of the adjusting nut 20 (upward in FIGS. 1 to 4 and FIG. 11). , The sliding of the adjusting nut 20 is prevented from being inadvertently released. Since the claw portion 33 of the arm portion 32 of the slide key 30 is pressed against the side surface of the guide groove 10, the protrusion 31 of the slide key 30 is
The slide key 30 is fixed in the guide groove 10 when the slide key 30 is not fitted in the recess 21 (see FIGS. 2 and 4). As a result, the convex portion 31 of the slide key 30 does not slide in the direction in which the convex portion 31 is fitted into the concave portion 21 of the adjusting nut 20 (downward in FIGS. 2 and 4) due to vibration or the like. Locks are not inadvertently made.

The stopper 34 inside the cylinder 12 and the slide key 30 outside the cylinder 12 are integrated via the opening 11 formed in the guide groove 10. Therefore, since the stopper portion 34 is always located on the lot side of the cylinder 12 of the throttle valve 43 (see FIGS. 3 and 4), the throttle valve 43 cannot escape from the lot side to the outside. Further, even if the slide key 30 is to be removed from the guide groove 10, the stopper portion 34 of the slide key 30 and the opening 11 of the guide groove 10 interfere with each other. .

Further, since the valve element 42 of the throttle valve 43 has a square shape (see FIG. 10), the adjusting valve 42 for adjusting the position (ie, the flow rate) of the throttle valve 43 in the cylinder 12 is adjusted. Even if the nut 20 is rotated, the throttle valve 43 itself does not rotate with the rotation of the adjusting nut 20. Therefore, the position of the throttle valve 43 (that is, the flow rate) in the cylinder 12 is determined by adjusting the adjusting nut 20.
The rotation can be adjusted reliably.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention. For example, the flow control valve 40 of the above embodiment
Is used as a throttle valve of the slow start valve 1, but may be used as a speed controller. Further, although the valve element 42 of the throttle valve 43 of the above embodiment has a square shape, any shape may be used as long as the throttle valve 43 itself does not rotate with the rotation of the adjusting nut 20. .

The throttle valve 43 of the above-described embodiment rises in the cylinder 12 (that is, reduces the flow rate) with the right rotation of the adjusting nut 20, but the right rotation of the adjusting nut 20 is performed. When lowering the inside of the cylinder 12 (that is, reducing the flow rate) in accordance with the above, the upper portion of the valve body 42 of the throttle valve 43 may be tapered in the opposite direction.

[0027]

As described above, in the flow control valve according to the first aspect, in order to adjust and reliably fix the flow rate, the position of the throttle valve in the cylinder (that is, the flow rate) is adjusted by rotating the adjusting nut. ) Is adjusted, and then the slide key is slid while being guided by the guide groove, so that the convex portion of the slide key is fitted into the concave portion of the adjusting nut. Thus, the adjusting nut can be easily locked without using a tool. Further, the state of the locked adjusting nut can be easily determined. Further, when the slide key is slid in the opposite direction, the convex portion of the slide key comes out of the concave portion of the adjusting nut, and the adjusting nut can rotate, so that the position of the throttle valve in the cylinder (that is, Flow rate) can be readjusted.

Further, in the flow control valve according to the second aspect, when the convex portion of the slide key is fitted into the concave portion of the adjusting nut and the adjusting nut is locked, the claw portion of the arm portion of the slide key is locked. The guide groove is locked at the open end. As a result, the convex portion of the slide key does not slide out of the concave portion of the adjusting nut due to vibration or the like, so that the locking of the adjusting nut is not inadvertently released. Also,
Since the claw portion of the arm portion of the slide key is in pressure contact with the guide groove, the slide key is fixed in the guide groove when the projection of the slide key is not fitted into the concave portion of the adjusting nut. Thereby, in the direction in which the convex portion of the slide key fits into the concave portion of the adjusting nut,
Since there is no sliding due to vibration or the like, the adjusting nut is not carelessly locked.

Further, in the flow control valve according to the third aspect, the stopper portion provided inside the cylinder and the slide key provided outside the cylinder are integrated via an opening formed in the guide groove. Therefore, since such a stopper portion is always located on the lot side of the cylinder of the throttle valve,
The throttle valve cannot escape from the lot side to the outside. Further, even if the slide key is to be removed from the guide groove, the stopper of the slide key and the opening of the guide groove interfere with each other, so that the slide key can be reliably prevented from coming off the guide groove.

Further, in the flow control valve according to the fourth aspect, the position of the throttle valve in the cylinder (ie, the flow rate)
Even if the adjusting nut is rotated to adjust the throttle valve, the throttle valve itself does not rotate with the rotation of the adjusting nut. Thereby, the position of the throttle valve in the cylinder (that is,
Flow rate) can be surely adjusted by rotating the adjusting nut.

As described above, according to the present invention, the adjusting nut can be easily locked without using a tool by fitting and removing the convex portion of the slide key and the concave portion of the adjusting nut. It is possible to provide a flow control valve capable of reliably fixing the flow rate and simultaneously visually confirming the locked state.

[Brief description of the drawings]

FIG. 1 is an external view of a flow control valve used for a slow start valve.

FIG. 2 is an external view of a flow control valve used for a slow start valve.

FIG. 3 is a sectional view of a flow control valve used for a slow start valve.

FIG. 4 is a cross-sectional view of a flow control valve used for a slow start valve.

FIG. 5 is a top view of the adjusting nut.

FIG. 6 is a cross-sectional view of an adjusting nut.

FIG. 7 is a front view of a slide key.

FIG. 8 is a side view of the slide key.

FIG. 9 is a front view of a throttle valve.

FIG. 10 is a bottom view of the throttle valve.

FIG. 11 shows a sectional view of a slow start valve using a flow control valve.

FIG. 12 is a side view of a conventional speed controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Guide groove 11 Opening 12 Cylinder 20 Adjusting nut 21 Concave part 30 Slide key 31 Convex part 32 Arm part 33 Claw part 34 Stopper part 40 Flow control valve 43 Throttle valve

Claims (4)

(57) [Claims] 1. Rotation of an adjusting nut,
A flow control valve for adjusting a position of a throttle valve in a cylinder, a slide key provided with a concave portion provided around the adjusting nut, a slide key provided with a convex portion to be fitted into and disengaged from the concave portion; A groove, and sliding the slide key to fit a convex portion of the slide key into a concave portion of the adjusting nut, thereby preventing rotation of the adjusting nut and positioning the throttle valve. A flow control valve characterized by fixing the pressure. 2. An arm provided on both sides of the slide key, and a claw provided on the arm and pressed against the guide groove, wherein the protrusion of the slide key is provided with the adjusting nut. 2. The claw portion of the arm portion is engaged with the opening end of the guide groove when fitted into the concave portion.
Flow control valve described in the above. 3. A stopper portion fixed to the slide key, and an opening formed in the guide groove and communicating the cylinder with the outside on the lot side of the throttle valve, The stopper portion is provided on the lot side of the cylinder of the throttle valve through the opening, so that the slide key can be separated from the guide groove and the throttle valve can be removed from the lot side. The flow control valve according to claim 1, wherein the flow control valve is prevented by: 4. The flow control valve according to claim 1, wherein the throttle valve has a square shape.