JPH017902Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a flow rate regulating valve.

Although the present invention is primarily intended for flow rate regulating valves for gases, it does not preclude application to those for liquids. or,
The main mode of use is to be attached to a conduit for at least one type of fluid when two or more types of fluids are used at the same time, but it is not limited to this only.

An example of the above-mentioned main mode of use will be outlined below.

Gas cutting, gas welding, gas cutting, gas heating, etc. use a flame of a mixed gas of flammable gas and oxygen gas. A standard flame can be obtained only when the mixture ratio is within a certain narrow range, but in actual work, there are many cases where the standard flame is inappropriate, and the gas flow rate must be adjusted to suit each work. is the current situation. It is very important for work efficiency and work properties to devise ways to reliably and easily obtain the same flame conditions as before when the work is resumed after being interrupted.

A conventional example of such a device is Utility Model No. 55-150221.
There is something described in the publication. This is also shown in Figures 1 and 2, and will be summarized below.

The valve spindle 1 is screwed into a spindle holder 2, and the spindle holder 2 is screwed into the main body 3. A ring body 4 externally fitted onto the spindle holder 2 is fixed to the spindle holder 2 with screws 5. The ring body 4 is provided with a large number of grooves 6 and corresponding scales 7. An elastic wire 9 such as piano wire is fixed to a knob 8 fixed to the valve spindle 1, and an index 10 for the scale 7 is provided. The elastic wire 9 clicks into each of the grooves 6.

When the indicator 10 is at 0 on the scale 7, the valve body 11 attached to one end of the valve spindle 1 is in the closed position. When resuming work, the worker memorizes the value on the scale 7 that was indicated by the in-use indicator 10 last time,
Turn knob 8 so that index 10 goes to that value again this time. During this period, the elastic wire 9 is repeatedly engaged with the groove 6 and then pulled out of the groove 6 and engaged with the next groove 6. When the indicator 10 reaches the desired value on the scale 7, the elastic wire 9 engages with the corresponding groove 6 to lock the position.

This has the following problems:

(a) The elastic wire 9, such as piano wire, has the following functions: (i) Locking by engaging the groove 6, that is, preventing the knob 8 and the valve spindle 1 from rotating; (ii) The groove 6 A single object has two different functions: the function of elastically engaging the groove 6 (click engagement), and the function of elastically deforming to allow the groove 6 to come out. .

The knob 8 is rotated frequently, and in one rotation operation, the knob is engaged and disengaged many times until it reaches the desired scale or returns to the 0 scale. repeated times.

Therefore, the elastic wire 9 tends to undergo mechanical fatigue within a relatively short period of time, and is likely to undergo plastic deformation due to a decrease in elastic force. If such deformation occurs and increases, the click engagement with the groove 6 becomes insufficient and the intended function cannot be achieved.

(b) It is necessary for the worker to memorize the scale 7 position indicated by the indicator 10 before interrupting the work, and if the worker does not memorize it before interrupting the work and closes the valve body 11 and interrupts the work. If you forget the scale 7 position that you thought you had memorized, you will not be able to quickly reproduce the same valve open state as before the work was interrupted.

The purpose of the present invention is to solve such problems.

The measures (gist structure) taken by the present invention for this purpose are as follows. In order to facilitate understanding, they will be described with the numbers used in the drawings related to the embodiments to be described later, but this should not be construed as limiting the technical scope of the present invention.

[] A valve spindle 20 with a valve body 23 connected to one end thereof is screwed into a spindle holder 27 provided in a valve box 21, and the valve spindle 2
The flow rate regulating valve is configured such that the valve body 23 moves toward and away from the valve seat 24 in the valve box 21 by a rotational operation of 0 to open and close the fluid passage.

[] The spindle holder 27 is attached to the valve box 2.
1, the valve spindle 20 is mounted so as to be movable and fixed in position relative to the valve spindle 20 in the axial direction, and rotates in conjunction with the rotational operation of the valve spindle 20, and is mounted relative to the spindle holder 27. The actuating body 33 is mounted so as to be freely displaceable in the far and near directions, and the spring 34 biases the actuating body 33 in a direction toward the spindle holder 27. On each side, the actuating body 33
A convex portion 37 and a concave portion 38 are provided, each of which is fitted into each other to restrict free rotation of the actuating body 33 due to phase matching caused by relative rotation between the actuating body 33 and the spindle holder 27.

[] As the valve spindle 20 is rotated relative to the spindle holder 27 from the position where the convex portion 37 and the concave portion 38 are fitted together, the mutual fitting of the convex portion 37 and the concave portion 38 is caused by the spring 34
During the rotation operation until the convex part 37 and the concave part 38 are fitted together,
The valve body 23 is configured to be closed.

The use of the flow rate regulating valve having the configuration [ ] or [ ] is as follows.

In a state where the convex portion 37 and the concave portion 38 are fitted into each other,
The spindle holder 27 is moved along the spindle axis direction together with the valve spindle 20, and the spindle holder 27 is fixed to the valve box 21 at a position where a desired valve opening state is achieved.

Then, when interrupting work, the valve spindle 2
When the valve spindle 20 is rotated, the actuating body 33 rotates in conjunction with the rotation of the valve spindle 20, and the interfit between the convex portion 37 and the concave portion 38 is released against the biasing force of the spring 34. From this state, when the valve spindle 20 is further rotated, , the convex portion 37 and the concave portion 38
The valve body 23 is operated to close before the two are fitted together again.

Next, when the valve spindle 20 is rotated from the valve closed state, the valve spindle 20 is moved to the spindle holder 2.
7, the operating body 33 rotates in conjunction with the spindle holder 27. As the actuating body 33 rotates, the convex portion 37 and the concave portion 38 gradually approach each other along the rotational direction, and when the phases match, the convex portion 37 and the concave portion 38 fit into each other due to the biasing force of the spring 34.

The interfit between the protrusion 37 and the recess 38 is felt as resistance to the hand applying rotational force to the valve spindle 20. If the operation on the valve spindle 20 is now stopped, the same valve open state as before the interruption of work will be reproduced.

In other words, the mutually fitted state of the convex portion 37 and the concave portion 38 is
The valve is in an open state with a predetermined flow rate. And this reciprocity is
Automatically appears by operating the valve spindle 20 revolutions. Therefore, despite the easy valve opening operation,
A valve open state with a predetermined flow rate is obtained.

The functions of the above configurations [] to [] are as follows.

(A) Interlocking convex portion 3 for holding the valve spindle 20 in the valve open position for a predetermined flow rate
7 or a component having a recess 38 -
That is, the actuating body 33 and a component for displacing the actuating body 33 and maintaining the interfitting state, which is a prerequisite for the interfitting action thereof, ie, the spring 34, are separated. In other words, each movement of mutually fitting and mutually disengaging the convex portion 37 and the concave portion 38 has a small influence on the spring 34, thereby suppressing mechanical fatigue, reduction in elastic force, and deformation of the spring 34.

(B) Furthermore, even if the spring 34 were to deform, this would not directly cause a serious hindrance to the interfitting action between the convex portion 37 and the concave portion 38. In the first place, as described above, since the spring 34 is difficult to deform, the interfitting action is reliable.

(C) By rotating the valve spindle 20 in the valve closed state and noticing that the protrusion 37 and the recess 38 have fitted into each other in the form of an increase in operating resistance, the predetermined valve open state is achieved. will be revealed.

Thus, the effects of the present invention are as follows: (a) The valve opening state at a predetermined flow rate can be repeatedly reproduced even with a simple valve opening operation, and (b) The spring and actuating body that make up the structure for this purpose are highly durable. (c) The function of maintaining the valve open state at the predetermined flow rate is also excellent.

(d) Since there is no need to memorize the amount of operation of the valve spindle, the predetermined valve opening state can be reliably reproduced, and even if the same flow rate adjustment valve is operated by different operators, A predetermined valve opening state can be efficiently reproduced without instructing another operator on the amount of operation each time.

-That is.

Next, an example of the present invention will be described.

[First Embodiment] See FIGS. 3 to 5.

The valve spindle 20 is inserted into the upright cylinder 22 of the valve box 21, and a cone-shaped valve body 23 at the tip thereof corresponds to the valve seat 24. 25 is an O-ring, and 26 is a bush. A spindle holder 27 to which the valve spindle 20 is screwed is screwed to the rising tube 22,
Similarly, it is prevented from rotating by a lock nut 28 which is threaded onto the raising tube 22.

A knob 30 with a knurl 29 on its outer periphery is hollow, and its top plate is fitted onto the different diameter portion of the valve spindle 20 in a non-rotating manner.
is fixed.

The knob 30 includes an actuating body 33, a spring 34, and a pin 35 inside. The actuating body 33 is externally fitted onto the valve spindle 20 so as to be freely displaceable in the axial direction thereof. A notch 36 is provided at the outer edge of the actuating body 33.
The free end of the pin 35 engages with this notch 36, so that the knob 30 and the operating body 33 rotate together with the valve spindle 20. At this time, the operating body 33 rotates so as to rub the end surface of the spindle holder 27. pin 35
is screwed and fixed to the top plate portion of the knob 30 in a position parallel to the spindle axis. Working body 33
is freely displaceable in the spindle axial direction regardless of engagement with the pin 35.

The actuating body 33 and the spindle holder 27 face each other, and at the facing parts, the actuating body 33 has a convex portion 37 and the spindle holder 27 has a concave portion 38.
are provided respectively, and by rotating the knob 30 less than one turn from the desired valve open state, the valve body 2 is opened.
3 is configured to close. The recess 38 has a shape and size that allows the projection 37 to fit therein.

When the convex part 37 is not fitted into the concave part 38, it is in contact with the flat surface of the spindle holder 27 as shown in FIG. 5, and at that time, the actuating body 33 is tilted.

The spring 34 is a compression coil spring, and is interposed between the actuating body 33 and the top plate portion of the knob 30 so as to be fitted approximately concentrically with respect to the valve spindle 20 .

How to use the flow rate regulating valve having such a configuration is as follows.

Turn the knob 30 to fit the protrusion 37 into the recess 38. Raise the spindle holder 27 to the tube 22
The valve spindle 20 and the valve body 23 are rotated relative to each other to move the valve spindle 20 and the valve body 23 so that the valve opening state corresponds to a desired flow rate. Then, the spindle holder 27 is fixed with a lock nut 28.

By doing so, when the valve is once closed and then opened again, by turning the knob 30 until the protrusion 37 fits into the recess 38, the valve open state at the set flow rate can be reliably reproduced.

Tapered surfaces 39 and 40 are formed on the convex portion 37 and the concave portion 38, respectively, so that the convex portion 37 easily separates from the concave portion 38 when the knob 30 is turned in the valve-closing direction.

[Second Embodiment] See Figure 6.

A concave portion 38 is provided on the operating body 33 and a convex portion 37 is provided on the spindle holder 27, and the other structure is the same as that of the first embodiment.

[Third Embodiment] See FIG. 7.

A screw 41 passing through the knob 30 serves as a structure for preventing the actuating body 33 from rotating relative to the valve spindle 20.
[It may be a pin] is adapted to engage with the notch 36 of the actuating body 33.

[Other Examples] Not shown.

By fitting the actuating body 33 and the valve spindle 20 with different diameters, the structure is such that they can rotate together.

A leaf spring is used as the spring 34.

Concave portions 38 corresponding to convex portions 37 are provided at multiple points with different phases around the spindle axis.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

1 and 2 are a sectional view and an exploded perspective view of a conventional example. 3 to 5 relate to the first embodiment, FIG. 3 is a sectional view, FIG. 4 is a perspective view of an exploded state, FIG. 5 is a sectional view of main parts, and FIG. 6 is a second embodiment. A perspective view of the main parts in an exploded state, No. 7
The figure is a sectional view of main parts according to the third embodiment. 20... Valve spindle, 27... Spindle holder, 28... Lock nut, 30... Knob, 33... Operating body, 34... Spring, 35... Pin, 36... Notch, 37... Convex part, 38... recess.

Claims (1)

[Claims for Utility Model Registration] 1. A valve spindle 2 with a valve body 23 connected to one end.
0 is screwed into a spindle holder 27 provided in the valve box 21, and by rotating the valve spindle 20, the valve body 23 moves near and far with respect to the valve seat 24 in the valve box 21, and the fluid is In a flow rate regulating valve configured to open and close a passage, the spindle holder 27 is attached to the valve box 21.
The spindle holder 2 is mounted such that it can be moved relative to the valve spindle 20 in the axial direction of the valve spindle 20 and can be fixed in position.
an actuating body 33 mounted so as to be freely displaceable in the distance direction with respect to 7; and a spring 3 that urges the actuating body 33 in a direction toward the spindle holder 27.
4, and further fitted into each one of the actuating body 33 and the spindle holder 27 by phase matching accompanying relative rotation between the actuating body 33 and the spindle holder 27, thereby allowing free rotation of the actuating body 33. One of the convex portion 37 and the concave portion 38 is provided, and as the valve spindle 20 is rotated relative to the spindle holder 27 from the position where the convex portion 37 and the concave portion 38 are fitted together, the aforementioned During the rotation operation until the convex portion 37 and the concave portion 38 are mutually fitted against each other and are released against the biasing force of the spring 34, and the convex portion 37 and the concave portion 38 are then mutually fitted, the valve body 23 A flow rate regulating valve configured to be closed. 2. The flow rate regulating valve according to claim 1, wherein the operating body 33 is rotated integrally with the valve spindle 20. 3 the actuating body 33 faces the spindle holder 27 with respect to the valve spindle 20;
The flow rate regulating valve according to claim 2, which is mounted so as to be freely displaceable in the axial direction of the spindle. 4. The valve spindle 20 is configured such that the knob 30 houses the operating body 33 therein, and a pin 35 is fixed to the knob 30 in a state parallel to the axis of the spindle; Notch 36 on the outer edge of the operating body 33
The engagement between the valve spindle 20 and the actuating body 3
3. The flow rate regulating valve according to claim 3, which is a means for integral rotation with 3 and relative displacement in the spindle axis direction. 5. The utility model according to claim 4, wherein the spring 34 is a compression coil spring and is interposed between the operating body 33 and the knob 30 in a state that the spring 34 is a compression coil spring and is sheathed approximately concentrically with respect to the valve spindle 20. Flow rate adjustment valve. 6 The number of the convex portions 37 is 1, and the number of the concave portions 38 is 1.
The flow rate regulating valve according to any one of claims 1 to 5, wherein the number of is 1. 7 The number of the convex portions 37 is 1, and the number of the concave portions 38 is 1.
The flow rate regulating valve according to any one of claims 1 to 5, wherein the number of is two or more. 8 The spindle holder 27 is connected to the valve box 21
is screwed onto the lock nut 28,
The flow rate regulating valve according to any one of claims 1 to 7, which is configured to fix its relative position with respect to the valve box 21.