JPS6347335Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fluid control valve that controls fluid by rotating an adjustment member rotatably screwed onto a valve body, and particularly relates to a fluid control valve that delicately controls fluid.

Conventionally, this type of fluid control valve has been provided with an adjusting member rotatably screwed onto the valve body so that the fluid can be controlled by advancing and retracting by rotational operation, as shown in Japanese Patent Publication No. 55-9931. The rotation speed of the adjusting member can be read by reading the scale formed on the valve body where the end of the adjusting member is located by moving the adjusting member forward and backward by rotating the member, and by rotating the adjusting member, the end of the adjusting member can be positioned at the reference line formed on the valve body. By reading scales formed at equal intervals in the circumferential direction on the outer surface of the adjusting member, the rotation angle of the adjusting member is determined and the adjustment amount of the adjusting member is confirmed.

However, if the adjustment member is screwed into the valve body with a fine screw pitch to delicately control the fluid, the amount of movement of the adjustment member in relation to its rotation becomes minute, making it difficult to read the rotational speed of the adjustment member. There was a problem in that it was difficult to accurately confirm minute adjustments and was prone to erroneous operation.

The present invention solves these problems and provides a fluid control valve that makes it easy to accurately confirm minute adjustments of the adjustment member and reduces erroneous operations.

For this reason, the present invention has an adjustment member that is rotatably screwed onto the valve body so as to move forward and backward by rotational operation to control the fluid, and an adjustment member that is screwed onto the outer periphery of the adjustment member and is non-rotatable between the valve body and the adjustment member. The adjustment member and the display member are provided with a display member provided between the adjustment member and the display member so that the rotation speed and rotation angle of the adjustment member can be read. The screw pitch for screwing the display member onto the adjustment member is larger than the screw pitch for screwing the adjustment member onto the valve body so that the relative movement between the display member and the valve body is larger.

In the configuration of the present invention, the adjusting member moves forward and backward by rotating the adjusting member to control the fluid. As the adjustment member is rotated, the display member moves back and forth relatively more than the adjustment member, and the rotation speed of the adjustment member is read by the indicator between the adjustment member and the display member. Further, the rotation angle of the adjustment member can be read by the indicator based on the relative rotation of the adjustment member with respect to the display member provided non-rotatably on the valve body. Therefore, the rotation speed of the adjustment member can be read by the large relative movement of the display member in accordance with the small movement of the adjustment member, and the rotation speed of the adjustment member can be easily and accurately read along with the rotation angle. It is possible to easily confirm the amount of adjustment accurately and to reduce erroneous operations.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 1 and 2, 1 is a valve body of a fluid control valve that controls the flow rate, and is a left-handed screw having a fitting hole 4 that communicates with an inflow path 2 and an outflow path 3 for liquid as a fluid. A hole 5 is formed at one end. A screw member 6 is screwed into the screw hole 5, and its tip end is fitted into the fitting hole 4 so that it can rotate and move forward and backward. The diameter of the screw member 6 is gradually reduced from the end face of the tip to form a communication hole 7 communicating with the inflow passage 2 inside in the axial direction, and a thin blade is formed at the tip.
Reference numeral 8 denotes a constriction section formed by a thin blade at the tip of the screw member 6 and an annular groove 9 communicating with the fitting hole 4, and is formed into a thin blade orifice to reduce the influence of viscosity and control the flow rate. Reference numeral 10 denotes a pressure compensating spool disposed in the inlet passage 2, which receives the pressure before and after the constricted portion 8 on both end faces and slides to compensate for the differential pressure across the constricted portion at a constant level. Reference numeral 11 denotes an operating member that is connected to the screw member 6 to form the attachment adjustment member 12. The operating member 11 is inserted into the protrusion on one end side of the valve body 1, and the screw member 6 is rotated and moved back and forth by manual rotation operation to adjust the throttle portion 8. It is designed to adjust the opening degree. Note that the adjustment member 12 may be formed from a single member instead of the two members, the screw member 6 and the operating member 11. Reference numeral 13 denotes an annular display member, which is screwed into a right-handed threaded portion 14 provided on the outer periphery of the adjustment member 12 and fitted into a fitting hole 15 formed in the valve body 1 with a pin 16 to prevent rotation. It matches. The thread pitch of the threaded portion 14 is set larger than the thread pitch of the threaded hole 5. Reference numeral 17 denotes a marking section provided on the adjusting member 12, which is formed by marking a scale at equal intervals in the axial direction on a part of the outer circumferential surface of the adjusting member. Display section 17
The number of rotations of the adjustment member 12 can be read by visually reading the marking scale closest to the edge 18 of the display member 13, which serves as a marking portion facing the marking portion. Reference numeral 19 denotes a marking part provided on the display member 13, which is formed by marking the outer end surface of the display member into 10 equal divisions in the circumferential direction, and the adjusting member 12 is arranged so as to face the marking part.
The rotation angle of the adjustment member 12 can be read by visually reading the marking scale on which the marking section 20 provided is located. Note that the display parts 19 and 20 may be arranged in reverse. Reference numeral 21 denotes a fixing screw provided on the adjusting member 12, which fixes the adjusting member 12 by rotating the screw and bringing its tip into contact with the valve body 1.

Next, the operation of the above configuration will be explained.

The liquid that has flowed into the inflow path 2 passes through the communication hole 7, is throttled by the throttle section 8, and flows out into the outflow path 3. The flow rate of the liquid is set by rotating the adjustment member 12 and adjusting the opening degree of the throttle section 8.
Now, when the adjusting member 12 is rotated to the right when viewed from the left in FIG. 1, the adjusting member moves back and forth to the left in FIG. . Since the display member 13 is prevented from rotating by the pin 16, as the adjustment member 12 is rotated clockwise, the display member 13 moves forward and backward on the adjustment member 12 to the left in FIG. 1 due to the thread pitch of the threaded portion 14. Adjustment member 12
If the display part 17 is provided so that the display member 13 moves one scale relative to the adjustment member 12 when the display member 13 rotates once, the display scale closest to the edge 18 of the display member 13 can be visually confirmed and adjusted. The rotational speed of the member 12 can be read, and the rotation angle of the adjustment member 12 can be read by visually checking the display scale of the display part 19 relative to the display part 20 of the adjustment member 12. The minute adjustment amount of the member 12 can be easily confirmed, and the minute flow rate can be set quickly and accurately.

In addition, in this example, the valve body and the adjustment member were screwed together with a left-hand thread, and the adjustment member and the display member were screwed together with a right-hand thread.
The same effect can be obtained by screwing the valve body and the adjustment member, and the adjustment member and the display member, together with a right-hand or left-hand thread.

In this way, the present invention has an adjustment member that is rotatably screwed to the valve body so as to move forward and backward by rotational operation to control the fluid, and an adjustment member that is screwed to the outer periphery of the adjustment member and cannot rotate between the valve body and the adjustment member. and a display part provided between the adjustment member and the display member so that the number of rotations and rotation angle of the adjustment member can be read, and the adjustment member can be displayed by moving the adjustment member forward or backward by rotating the adjustment member. By making the screw pitch for screwing the display member onto the adjustment member larger than the screw pitch for screwing the adjustment member onto the valve body so that the movement relative to the adjustment member can be increased, the rotation speed and rotation of the adjustment member can be increased. The angle can be read easily and accurately, making it easy to accurately confirm minute adjustments, and reducing erroneous operations.

In addition, since a display part is provided between the adjustment member and the display member so that the rotation speed and rotation angle of the adjustment member can be read, a display part is provided between the adjustment member and the display member so that the rotation angle of the adjustment member can be read. Although the problems of the present invention can be solved by providing a display part between the display member and the valve body so that the rotation speed of the adjustment member can be read, the problem of the present invention can be solved. This has the effect of making it easier to read the marking section by making it possible to read the rotation speed and rotation angle.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a fluid control valve showing an embodiment of the present invention, and FIG. 2 is an external view thereof. DESCRIPTION OF SYMBOLS 1... Valve body, 12... Adjustment member, 13... Display member, 17, 18, 19, 20... Indication part.

Claims (1)

[Scope of utility model registration request] an adjusting member rotatably screwed onto the valve body so as to move forward and backward by rotational operation to control the fluid;
A display member screwed onto the outer periphery of the adjustment member and provided non-rotatably between the adjustment member and the valve body, and an indicator provided between the adjustment member and the display member so that the rotation speed and rotation angle of the adjustment member can be read, The display member is screwed onto the adjustment member through the screw pitch used to screw the adjustment member onto the valve body so that the relative movement between the adjustment member and the display member is greater than the movement of the adjustment member when the adjustment member is rotated. A fluid control valve with a large thread pitch.