JPS5825189Y2 - Variable opening rotary valve - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a variable opening rotary valve having an adjustable stopper for limiting the opening.

In variable-opening rotary valves in which the valve body is rotated using a lever, it is important to determine how much the lever has rotated from its closed state, i.e., when the closed position is set to 00. There is an advantage that the measurement of the valve can be adjusted to a certain extent by visually checking the rotation angle of the valve in rough register or through a scale plate or the like.

Therefore, ball valves and butterfly valves are used as flow control valves to obtain hot water at the optimal temperature in solar water heaters, flow control valves for cutting oil supplied to machine tools, etc., flow control valves for fuel supplied to boilers, etc. Variable opening rotary valves such as valves are often used.

However, in such a variable opening rotary valve, even if a scale plate is used, the lever is operated manually, so errors in reading the scale or operation errors may cause the lever to be turned too much or squeezed too much. In addition, there is a disadvantage that it requires intuition and skill to position the lever at the optimum position.

As a result, such rotary valves can be used as flow control valves for hot water in solar water heaters as described above, flow control valves for cutting oil supplied to machine tools, etc., flow control valves for fuel supplied to boilers, etc. If the lever is turned too much, the hot water temperature may drop below the desired value, cutting oil may overflow from the machine tool, or the boiler temperature may reach a dangerous value. There are risks such as the water temperature becoming too high at night, the machine tools being worn out, and the boiler fire going out (normally, when the boiler is temporarily shut down, the boiler fire must be left as a pilot flame).

The object of the present invention is to provide a variable opening rotary valve that eliminates the above-mentioned drawbacks by providing an adjustable and extremely simple stopper for limiting the opening. .

The structure of the present invention is a rotary valve in which the valve body is rotated using a lever, in which a slidable stopper whose one end is displaced within the locus of movement of the lever is secured to the valve body with a set screw. The following description will be made based on the embodiments shown in the accompanying drawings.

1 to 4 show a first embodiment in which the present invention is applied to a ball valve.

Reference numeral 1 denotes a valve body in the form of a roughly hexagonal columnar valve box.As shown in Fig. 4, inside the valve body there is a cylindrical valve chamber 2 in the center, and an inlet side and an outlet side flow chamber on the left and right sides of the valve body. Female threaded holes 3 and 4 forming a channel are bored one after the other.

In the valve chamber 2 of the valve body 1, a spherical valve body 6 with a laterally facing valve hole 5 is disposed, and in the left and right internal threaded holes 3 and 4, an inner end is provided. An annular valve seat 7 at the edge;
The valve seat holding cylinders 9 and 10 fitted with the valve seat holding cylinders 9 and 8 are screwed in, and by appropriately tightening these valve seat holding cylinders 9 and 10 toward the valve body 6, the valve body 6 and the valve seat 7, 8 and the valve seat holding cylinder 9.

The upper end of the valve body 6 has a groove 6a facing in the same direction as the valve hole 5.
is cut into the groove 6a, and a vertical plate-shaped engagement piece 11a at the lower end of the valve stem 11, which is penetrated through the valve body 1 at a suitable position directly above the valve body 6, is fitted into the groove 6a, and the vertical plate-shaped engagement piece 11a is fitted into the groove 6a. By rotating the rod 11 about its axis, the valve body 6 can be rotated about a vertical axis that is substantially the same as the axis of the valve stem 11.

A snap ring 12 is fitted near the lower end of the valve stem 11 that protrudes into the valve chamber 2, thereby preventing the valve stem 11 from being removed from the valve body 1.

Note that 13 is a 01J ring provided around the valve stem 11.

A shaft hole 15 formed at the center of a sector-shaped stopper 14 is fitted into a valve stem 11 that projects upward from the valve body 1 .

Near the arcuate edge 14a of this stopper 14,
An arc-shaped elongated hole 16 is cut with the valve stem 11 as the center of curvature.

By tightening the set screw 17 at a proper position on the upper surface of the valve body 1 through the elongated hole 16, the stopper 14 can move its side ends 14b and 14c to a desired rotation angle position around the valve stem 11. It is fixed to the valve body 1 so as to be located at .

The upper end portion of the valve stem 11 above the stopper 14 is formed as a tongue portion 11b having a generally vertical plate shape with parallel notches on opposite side portions, and the tongue portion 11b
A male thread 11c is threaded on the outer peripheral surface.

A long hole 19 cut in the base 18a of the lever 18 is fitted into the tongue 11b of the valve stem 11, and
A nut 20 is tightened from above, thereby fixing the lever 18 to the valve stem 11 so that it cannot move relative to it.

The handle portion 18b of the lever 18 projects in a cantilevered manner from the base portion 18a of the lever 18 so as to face in the same direction as the valve hole 5 in the valve body 8.

A downwardly bent engagement piece 18c is formed at a suitable position on the peripheral edge of the base 18a of the lever 18 on the opposite side of the handle 18b around the valve stem 11.

As shown by the solid line in FIG.
When the lever 18 is in the fully closed position facing in a direction perpendicular to the valve body 1, the lever 18 comes into contact with an appropriate side surface of the valve body 1 to prevent further rotation of the lever 18 in the clockwise direction in FIG. When the lever 18 and the valve body 6 are rotated by an appropriate angle in the counterclockwise direction in FIG. 3 from their positions, they come into contact with one side end 14b of the stopper 14, and this state is shown by imaginary lines in FIG. 3) , preventing further rotation of the lever 18 in the counterclockwise direction in FIG.

Therefore, in the rotary valve of the first embodiment, when the lever 18 is in the above-mentioned fully closed position, the valve hole 5 in the valve body 6 faces in a direction perpendicular to the valve body 1.
The outlet and inlet flow paths formed by the left and right female screw holes 3 and 4 in the valve body 1 are completely blocked by the valve body 6, and from that position, the lever 18 is moved counterclockwise in FIG. As it rotates, the rate at which the valve hole 5 in the valve body 6 communicates with the spaces in the female threaded holes 3 and 4, that is, the opening degree of the valve, gradually increases, and the engagement piece 18c in the lever 18 moves toward the side of the stopper 14. When it comes into contact with the end 14b, the opening degree of the valve becomes maximum.

Since the rotary valve of the first embodiment has the above-described configuration, loosen the set screw 17 and move the stopper 14 to the valve stem 1.
1, and then tightening the setscrew 17 again to position the measuring end 14b of the stopper 14 at a desired position within the locus of movement of the engagement piece 18C on the lever 18, thereby increasing the valve's maximum The opening degree can be limited to a desired value, and the opening degree of the valve can also be adjusted to a desired value within the range from 0 to the above-mentioned maximum opening degree by operating the lever 18. Extremely convenient.

In addition, in the rotary valve of this first embodiment, the lever 18
is rotated 1800 times from the state shown in the third figure and attached to the valve stem 11, and the rotational position of the other side end 14c of the stopper 14 around the valve stem 11 is appropriately adjusted in the same manner as in the above case. It is also possible to limit the minimum opening degree to a desired value.

5 and 6 show a second embodiment of the invention.

In this second embodiment, a ring 21 is fitted into the vicinity of one side end of the valve body 1, and the ring 21 is fixed to the valve body 1 with an appropriate set screw 22. A plate-shaped stopper 23 is fitted at key points on the outer circumferential surface of the valve body 1 so as to be slidable in the axial direction of the valve body 1, and via a longitudinal elongated hole 24 cut in the stopper 23, By tightening the set screw 25 to the ring 21,
One end of the stopper 23 is connected to the engaging piece 18 of the lever 18.
The stopper 23 is fixed to the ring 21 so as to tangentially enter into the rotational locus of the valve c, and the engagement piece 18c comes into contact with one end of the stopper 23, thereby limiting the maximum opening of the valve. It is.

Note that the other configurations are the same as those of the first embodiment.

It can be seen that the rotary valve of the second embodiment can provide almost the same functions and effects as those of the first embodiment.

Also, in the rotary valve of this second embodiment, the lever 18
is attached to the valve stem 11 in a state where it has been rotated 1800 degrees from the state shown in FIGS. By fixing the valves at symmetrical positions, the minimum opening degree of the valve can be limited to a desired value.

7 and 8 show a third embodiment of the invention.

In this third embodiment, a generally upward C
The stopper ring 26 is fitted onto the outer periphery of the valve body 1 so as to be slidable in the axial direction so that the upper end vicinity of the stopper ring 26, which is shaped like a letter, enters into the rotation locus of the engagement piece 18c of the lever 18. At the same time, tighten and fix the stopper ring 26 to the valve body 1 with an appropriate set screw 27,
By abutting the retaining piece 18c against the stopper ring 26, the maximum opening degree of the valve is limited to a desired value.

It can be seen that the rotary valve of the third embodiment can also achieve the same functions and effects as those of the first embodiment.

In the case of the third embodiment, the minimum opening degree of the valve can be limited to a desired value by simply rotating the lever 18 by 180 degrees from the illustrated state and attaching it to the valve stem 11. Therefore, it is convenient.

FIG. 9 shows a fourth embodiment of the present invention.

In this fourth embodiment, the stopper ring 26 in the third embodiment is replaced with a stopper frame 28.

The stopper frame 28 has an upward C-shape in close contact with the other five outer peripheral surfaces of the hexagonal columnar valve body 1 excluding the top surface, and has an outwardly bent piece 28a at its upper end.
28a is of a coupled shape, and an appropriate set screw 2 is attached.
9 is fixed in place on the valve body 1.

It goes without saying that the fourth embodiment also provides the same functions and effects as the third embodiment.

In the case of this fourth embodiment, the outwardly bent piece 28a of the lever 18 that is not in contact with the engaging piece 18c may be omitted.

As is clear from the above, in the rotary valve of the present invention,
It is possible to limit the maximum or minimum opening of the valve to a desired value, and within the limit range, the valve opening can be freely selected by operating the handle, so there is no risk of danger within the control range. area, and the dangerous area changes due to other conditions, such as adjusting the flow rate of hot water in the solar water heater mentioned above, adjusting the flow rate of cutting oil supplied to machine tools, or adjusting the flow rate of cutting oil supplied to a boiler. This valve is ideal for use in situations such as adjusting the flow rate of water.

In addition, the rotary valve of the present invention has a very simple structure and can be applied to conventional rotary valves, making it very convenient.

In addition, in the present invention, the stopper 1 in the first embodiment is
Two stoppers having the same configuration as 4 are fitted over the valve stem 11, and one end of one stopper limits the maximum opening of the valve, and one end of the other stopper limits the valve's opening. The minimum opening degree may be limited, or members having the same configuration as the ring 21, stopper 23, etc. in the second embodiment may be arranged side by side on both left and right sides of the valve body 1 so as to have a bilaterally symmetrical structure. Accordingly, the maximum opening degree and the minimum opening degree of the valve can be limited.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing the fully closed state of the rotary valve in the first embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a fully closed state of the rotary valve. A plan view showing the closed state as a solid line and the fully open state as a soho line,
FIG. 4 is a longitudinal sectional front view taken along the line rV-IV in FIG. , the line Vl- in FIG.
FIG. 7 is a plan view showing the rotary valve in the third embodiment of the present invention in the fully opened state; FIG. 8 is a longitudinal section taken along the line ■-■ in FIG. 7. The side view, FIG. 9, shows the rotary valve according to the fourth embodiment of the present invention in its fully opened state, and is a longitudinal sectional side view taken along the same section as FIG. 8. 1... Valve body, 2... Valve chamber, 3, 4...
...Female thread hole, 5...Valve hole, 6...
...Valve body, 6a... Groove, 7゜8...
Valve seat, 9, 10... Valve seat holding cylinder, 11...
...Valve stem, 11a...Engagement piece, 11b...
・・Tongue, 11c・・Boneshi 12・・・・
Snap ring, 13...0 ring, 14...
... Stopper, 14a ... Arc-shaped edge, 14
b, 14c...Side end, 15...Shaft JL
16...Firstborn L17...Set screw, 1
8... Lever 18a... Base, 18b
...Handle, 18c...Engagement piece, 19.
...Eldest child L20...Natsuto.

Claims (1)

[Scope of utility model registration request] A rotary valve in which a valve body is rotated by a lever, and a variable opening type in which a sliding stopper whose one end is displaced within the locus of movement of the lever is secured to the valve body with a set screw. rotary valve.