JP3020501U - Automatic valve with flow rate adjustment mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] Easy to operate the upper and lower adjustment knobs, there is no co-rotation of the adjustment knob by the lock knob operation, you can easily and securely lock with one hand, and each of the two adjustment knobs (EN) Provided is an automatic valve with a flow rate adjusting mechanism, which can be independently adjusted and two lock knobs can be completely locked, one lock and completely free depending on the operating angle of the lock knob. [Arrangement] In an automatic valve in which a valve body is pressed against a valve seat to be closed by a forward movement of a spring-biased piston to close the valve, and the valve body is separated from the valve seat by a backward movement of the piston due to pressure air to open. The upper and lower pistons have a fixed shaft integrated with the piston that penetrates outside the cylinder casing, and two upper and lower adjustment knobs are provided, and large and small arc-shaped recesses are equally formed on the outer circumference of the upper and lower adjustment knobs. A separate rotary shaft is provided parallel to the shaft on the upper surface of the cylinder casing, and the rotary shaft is provided with circular arc-shaped convex parts that engage with the large and small circular arc-shaped concave parts on the outer periphery of the upper and lower two-stage adjustment knobs by shifting the direction. An automatic valve with a flow rate adjustment mechanism that is equipped with a lock knob provided on the.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

The present invention relates to an automatic valve with a flow rate adjusting mechanism that allows a chemical solution, pure water, N ₂ gas, air, etc. to flow, and particularly a flow rate that allows easy and reliable adjustment operation and locking operation of an adjustment knob. The present invention relates to an automatic valve with an adjusting mechanism.

[0002]

[Prior art]

 A conventional automatic valve with a flow rate adjusting mechanism, which is mainly made of resin, has a valve body attached to the tip of a lower rod 3 by advancing a piston 2 by urging a spring 1 as shown in the left half of FIG. 4 is pressed and brought into close contact with the valve seat 5 to close the valve, and pressurized air is supplied to the lower cylinder chamber 2a of the piston 2 to resist the spring 1 and retract the piston 2 as shown in the right half of FIG. In order to adjust the flow rate by adjusting the opening of the valve body 4 by changing the stroke of the piston 2 in an automatic valve that opens the valve body 4 at the tip of the rod 3 apart from the valve seat 5. When the valve is closed, the opening of the valve body 4 is finely adjusted to allow an extremely small amount of fluid to flow, and to suppress the generation of microbes due to retention or to prevent the fluid (chemical solution) from solidifying. Screw the adjustment knobs 7 and 8 into the upper and lower two steps from the outside to the outer circumference of the cylinder of the lower adjustment knob 8. Screwed a lock nut 9, it is made of screwed a lock nut 10 on the upper end portion of the screw shaft 6 in the upper of the upper adjustment knob 7.

By the way, in such an automatic valve with a flow rate adjusting mechanism, since the adjusting nuts 7 and 8 are provided with the lock nuts 10 and 9, respectively, these are overlapped in four stages in a pyramid shape and are difficult to adjust. Further, when the lock nuts 9 and 10 are tightened, the adjustment knobs 7 and 8 are easily rotated, and it is very difficult to lock them with one hand. Further, in a flow rate adjusting mechanism in which the adjusting knobs 7 and 8 are in upper and lower stages, the lower adjusting knob 8 cannot be adjusted independently.

[0004]

[Problems to be solved by the device]

 Therefore, the present invention makes it easy to operate the upper and lower two-stage adjustment knobs, there is no co-rotation of the adjustment knobs by the lock knob operation, and the lock operation can be performed easily and surely with one hand, and the two adjustment knobs can be adjusted individually. It is intended to provide an automatic valve with a flow rate adjusting mechanism that can be operated, and two adjustment knobs can be completely locked, one locked, and completely free depending on the operating angle of the lock knob.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the automatic valve with a flow rate adjusting mechanism of the present invention closes the valve body by pressing the valve body against the valve seat by the forward movement of the spring-biased piston and closing the valve body by the backward movement of the piston by the pressure air. In the automatic valve that opens the valve away from the valve seat, a fixed shaft that is integrated with the piston that penetrates to the outside of the cylinder casing above the piston is provided with two upper and lower adjustment knobs and the upper and lower adjustment knobs. Large and small arcuate recesses are equally formed on the outer circumference of the cylinder, and a separate rotary shaft is provided on the upper surface of the cylinder casing in parallel with the fixed shaft, and the rotary shaft has large and small circular arcs on the outer circumference of the upper and lower adjustment knobs. The arc-shaped convex portion that engages with the concave portion is attached with a lock knob that is provided in two upper and lower stages by shifting the direction.

[0006]

[Action]

 The automatic valve with a flow rate adjusting mechanism of the present invention configured as described above adjusts the retreat stroke of the piston when the valve is opened to adjust the opening degree of the valve body by simply rotating the adjustment knob in the lower stage. It is possible to adjust and adjust the flow rate, and it is possible to flow a very small amount of fluid by finely adjusting the opening degree of the valve body when the valve is closed by simply operating the adjustment knob on the upper stage. In order to fix the upper and lower two-stage adjustment knob after rotation, rotate the lock knob, and engage the upper and lower two-stage arc-shaped convex portions of the lock knob with the arc-shaped concave portions on the outer periphery of the adjustment knob, respectively, to ensure the It is locked so that the adjustment knob does not rotate together as in the past. Further, with respect to the upper and lower two-stage adjustment knobs, one of the adjustment knobs can be locked and the other of the adjustment knobs can be freed at about half the rotation angle of the lock knob. That is, the upper and lower adjustment knobs can be adjusted independently. Moreover, the lock knob and adjustment knob can be operated with one hand.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an automatic valve with a flow rate adjusting mechanism of the present invention will be described with reference to the drawings. 1 is a plan view and FIG. 2 is a vertical cross-sectional view. In the figure, 11 is a valve body, 12 is a valve drive part, both of which are made of resin. The valve body 11 is provided with a fluid inflow passage 13 on one side and a fluid outflow passage 14 on the other side. The outlet side of the fluid inflow passage 13 is opened vertically to the center of the valve body 11, and the valve seat 15 is provided on the periphery of the opening. Are formed to project. Reference numeral 16 denotes a valve body facing the valve seat 15. The valve body 16 has a thin plate-shaped flexible ring 17 integrally formed on the outer periphery thereof, and a retaining ring 18 having an inverted L-shaped cross section is integrally provided on the outer periphery thereof. The retaining ring 18 is fitted in the peripheral groove 19 in the valve body 11, and is pressed by the lower cylinder casing 20 of the valve drive unit 12. An upper cylinder casing 21 is rotatably fitted to the upper end of the lower cylinder casing 20, and pistons 22 are fitted in the cylinder casings 21 and 20 on the upper and lower sides in a hermetically slidable manner. The rod 23 on the lower side of the piston 22 is slidably inserted through a through hole 24 at the center of the lower cylinder casing 20, and its tip is screwed to the valve element 16. The fixed shaft 25 integrally provided on the upper side of the piston 22 penetrates the inner cylinder portion 26 of the upper cylinder casing 21 and projects to the outside, and the screw 27 is provided on the inner periphery of the lower half of the inner cylinder portion 26. An adjusting piece 28 slidably fitted to the lower portion of the fixed shaft 25 is screwed into the screw 27. The shaft portion of the first adjusting knob 29 fitted to the fixed shaft 25 and the adjusting piece 28 is fitted into the inner periphery of the upper half portion of the inner cylinder portion 26 of the upper cylinder casing 21, and the retaining ring 30 serves as the upper cylinder casing. It can rotate integrally with 21. A second adjusting knob 32 is screwed onto the threaded portion 31 on the upper portion of the fixed shaft 25. A spring 33 that biases the piston 22 downward to close the valve is fitted between the piston 22 and the inner upper end surface of the upper cylinder casing 21, and is fitted inside the upper end of the lower cylinder casing 20. The lower end of the fitted upper cylinder casing 21 serves as a stopper for the piston 22. A pressure air introduction port 34 is provided on the outer periphery of the lower cylinder casing 20, and an air communication port 35 is provided on the outer periphery of the upper cylinder casing 21. On the outer circumferences of the first adjustment knob 29 and the second adjustment knob 32, large and small arcuate concave portions 36 and 37 are equally formed.

On the upper surface of the upper cylinder casing 21, however, a rotary shaft 38 is provided separately in parallel with the fixed shaft 25, and the rotary shaft 38 is provided with the second adjusting knob 32 and the second adjusting knob 32 as shown in FIG. (1) A lock knob 41 is provided which is arranged in upper and lower two stages by shifting the azimuths of large and small circular arc-shaped convex portions 39 and 40 around the center of the rotary shaft 38 which engages with the circular arc-shaped concave portions 36 and 37 of the adjustment knob 29. It is attached.

In the resin automatic flow control mechanism-equipped automatic valve of the embodiment configured as described above, the piston 22 is normally urged downward by the spring 33 and is screwed to the tip of the lower rod 23. The valve body 16 is pressed against the valve seat 15 and is in close contact with the valve seat 15 to close the valve. When pressurized air is supplied into the lower cylinder casing 20 of the piston 22 from the pressurized air inlet 34, the piston 22 retreats upward against the spring 33 as shown in FIG. The valve body 16 is opened apart from the valve seat 15.

When the first adjustment knob 29 is rotated when the valve is opened, the adjustment piece 28 screwed into the screw 27 on the inner circumference of the lower half portion of the inner cylinder portion 26 of the upper cylinder casing 21 moves forward to move the piston. The backward stroke of 22 is adjusted, the opening degree of the valve element 16 is adjusted, and the flow rate of the fluid is adjusted.

When the second adjustment knob 32 is rotated when the valve is closed, the piston 22 is pulled up together with the upper fixed shaft 25 of the piston 22, and the opening degree of the valve body 16 is finely adjusted together with the lower rod 23. A very small amount of fluid flows. As a result, generation of microorganisms due to retention is suppressed, or solidification of the fluid (chemical solution) is prevented.

The first adjustment knob 29 and the second adjustment knob 32 rotate the lock knob 41 in order to fix them after rotation, and the arc-shaped recesses 36 on the outer circumferences of the first adjustment knob 29 and the second adjustment knob 32, respectively. By engaging the arcuate convex portions 40 and 39 of the lock knob 41 with 37, the lock knob 41 is securely locked.

In the case of this example, the two-stage first adjustment knob 29 and the second adjustment knob 32 are formed in an arc shape by the rotational positions A, B, C, D, and E of the lock knob 41. The arcuate projections 40 and 39 are engaged with the recesses 36 and 37 to be locked, or released to be free. The state is shown in Table 1 below.

[0014]

[Table 1]

As can be seen from Table 1, at the rotation position B of the lock knob 41, the first adjustment knob 29 is locked, the second adjustment knob 32 becomes free, and at the rotation position D, the first adjustment knob 29 becomes free. The second adjustment knob 32 is locked. Therefore, both adjusting knobs 29 and 32 are individually adjusted. Moreover, the lock knob 41 and both adjustment knobs 29 and 32 can be operated with one hand, which is easy.

[0016]

[Effect of device]

 As can be seen from the above description, the automatic valve with a flow rate adjusting mechanism of the present invention allows easy operation of the upper and lower two-stage adjustment knobs, and there is no co-rotation of the adjustment knobs by the lock knob operation, so it can be locked easily and securely with one hand. can do. Also, each adjustment knob can be adjusted independently. Furthermore, since each adjustment knob can be completely locked, one lock, or completely free depending on the operation angle of the lock knob, adjustment and lock operations can be performed quickly.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an automatic valve with a flow rate adjusting mechanism of the present invention.

FIG. 2 is a vertical cross-sectional view of a valve closed state showing an embodiment of an automatic valve with a flow rate adjusting mechanism of the present invention.

FIG. 3 is a view showing a positional relationship between an adjusting knob and a lock knob in an embodiment of the automatic valve with a flow rate adjusting mechanism of the present invention.

FIG. 4 is a vertical cross-sectional view showing a valve open state of the automatic valve with a flow rate adjusting mechanism of FIG.

FIG. 5 is a vertical sectional view of a conventional automatic valve with a flow rate adjusting mechanism.

[Explanation of symbols]

 11 Valve Main Body 12 Valve Drive 15 Valve Seat 16 Valve Body 20 Lower Cylinder Casing 21 Upper Cylinder Casing 22 Piston 23 Rod 25 Fixed Shaft 26 Inner Cylinder 28 Adjustment Piece 29 First Adjustment Knob 30 Stop Ring 31 Screw Part 32 Second Adjustment knob 33 Spring 34 Pressure air inlet 36 Arc-shaped recess on the outer circumference of the first adjustment knob 37 Arc-shaped recess on the outer circumference of the second adjustment knob 38 Rotation shaft 39 Arc-shaped projection 40 Arc-shaped projection 41 Lock knob

Claims (1)

[Scope of utility model registration request] 1. An automatic valve in which a valve body is pressed against a valve seat to be closed by a forward movement of a spring-biased piston to close the valve body, and the valve body is separated from the valve seat and opened by retracting the piston by pressure air. The upper and lower two-stage adjustment knobs are provided on the fixed shaft that is integral with the piston that penetrates the outside of the cylinder casing on the upper side of the piston, and large and small arc-shaped recesses are equally formed on the outer circumference of the upper and lower two-stage adjustment knobs. A separate rotary shaft is provided in parallel with the fixed shaft on the upper surface of the cylinder casing, and the rotary shaft has vertical and vertical arc-shaped projections that engage with the large and small arc-shaped recesses on the outer circumference of the upper and lower adjustment knobs. An automatic valve with a flow rate adjustment mechanism that is equipped with two-stage lock knobs.