JPH0213935Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a single membrane gas meter.

Conventionally, double membrane gas meters are generally known as membrane gas meters, but double membrane gas meters require a gas metering chamber, a membrane, a slide valve, a valve seat, etc., each in pairs. In addition, each interlocking mechanism becomes complicated and the number of parts to be assembled increases, which not only increases manufacturing costs but also increases the external size.

The present invention was developed by focusing on the drawbacks of conventional double-membrane gas meters. By forming the gas meter operable with a single membrane, the interlocking mechanism is simplified, and the number of parts required for assembly is reduced. It is an object of the present invention to provide a single-film gas meter which reduces the manufacturing cost by reducing the amount of gas and reduces the external size.

The present invention will be described below with reference to the accompanying drawings showing embodiments.

Fig. 1 is a partially cutaway schematic side vertical sectional view of the single membrane gas meter of the present invention, and Fig. 2 is a partially cutaway A of Fig. 1.
-A sectional view, and FIG. 3 shows a BB sectional view in FIG.

In the figure, the single membrane gas meter of the present invention has an upper case 1 forming a gas distribution chamber 1a, a gas measuring chamber and a gas exhaust guide alternately forming the upper case 1.
The lower case 2 is connected to the lower part of the lower case 2.

A gas inlet 3 and a gas outlet 5 are provided on the upper wall of the upper case 1 across a partition wall 4 and a gas inlet 3 communicating with the gas distribution chamber 1a, respectively.
A valve seat 7 is fixed to a partition wall 6 between the upper part of the valve seat 7 and the lower case 2, and can swing from side to side on the valve seat 7 using a support shaft 9 as a fulcrum by the action of a valve arm 17, which will be described later, on the upper part of the valve seat 7. A slide valve 8 is installed. However, valve seat 7
There are through holes 11a and 11b (11
b (not shown) are provided through the through holes 11a, 1
1b is opened to the outside of the slide valve 8 by the swinging of the slide valve 8, and the gas distribution chamber 1a is opened to the front case 2.
a or the rear case 2b.

A pipe 13 is provided upright in the upper case 1 via a support 12 on a partition wall (not shown), and a central shaft 14 is loosely inserted into the pipe 13 so as to be freely rotatable.
One end of the connecting rod B is fixedly attached to the upper part of the central shaft 14, and one end of the connecting rod A is fixedly attached to the lower part of the central shaft 14 while maintaining a constant horizontal angle substantially perpendicular to the connecting rod B. be done. Furthermore, a connecting rod C is connected to the other end of the connecting rod A through a support shaft 22 while maintaining a constant horizontal angle with the connecting rod A, and these connecting rods A, B
and C are attached so as to be rotatable around the central axis 14 while always interlocking.

Next, one end of a valve arm 17 is rotatably connected to the other end of the connecting rod B via a support shaft 16, and this other end is connected to the upper surface of the slide valve 8 via a support shaft 18. Fixed. In addition, at the other end of the connecting rod A, as shown in FIG.
The other end portion of the small armrest 21 is rotatably connected via a support shaft 22 . Therefore, the other end of the small armrest 21 is connected to one end of the connecting rods A and C via the support shaft 22, respectively. Therefore, when the slide valve 8 is located on one side of the valve seat 7 as shown in FIG. Preferably, the horizontal angle of the connecting rods A and B is set so that the valve arm 17 and the connecting rod B are also located in a straight line through the pipe inner shaft 14.

Also, the large armrest 1 to which one end of the small armrest 21 is connected
9 extends perpendicularly to the wing shaft 24, that is, in the horizontal direction, at an upper end 24a of the wing shaft 24 projecting into the upper case 1, which transmits the reciprocating motion of the membrane 10 in the lower case 2 through the wing 23. The setting is fixed.

Further, a leaf spring 25 is pivotally supported at one end 26 of the partition wall 6 between the upper case 1 and the lower case 2,
One end of a spring arm 27 is connected to the other end via a support shaft 28. The other end of the spring arm 27 is connected to one end of the connecting rod C via a support shaft 29.

Further, an integrated flow rate indicator 30 is disposed inside the upper case 1 facing the viewing window 1' provided at the front.
This integrated flow rate indicator 30 includes an interlocking mechanism (not shown),
For example, the lower case 2
The amount of gas alternately introduced into the front case 2a or the rear case 2b constituting the gas measuring chamber is measured.

On the other hand, inside the lower case 2, the capsule 10 attached and supported by a bladder plate (not shown) is attached to a concave wall 31 in the middle part of the inner circumferential surface.
The front case 2 is airtightly clamped into the tip recess 31a of
a and a rear case 2b are formed. Also, capsule 1
One end of a wing 23 is fixed to the rear case 2b side of the shell plate that supports 0, and the other end is the lower end of a wing shaft 24 that projects into the upper case 1 from the side end on the rear case 2b side. It is fixedly attached to the portion 24b.

Next, the operation of the present invention having the above structure will be explained based on the explanatory diagrams shown in FIGS. 4a to 4c.

First, in FIG. 4a, when the capsule 10 is located on the rear case 2b side of the lower case 2, the capsule 10 of the bladder wing 23 reciprocates together with the capsule 10. The attachment portion to the blade is located at point a, and the other end of the armrest 19, which is integrally attached via the wing shaft 24, ie, the support shaft 20, is located at point b. At this time, the small armrest 21 and the connecting rod A are located at the dead center in a straight line through the axis O of the central shaft 14, and the valve armrest 17 and the connecting rod B are in the same position. The slide valve 8 is located at the dead center in a straight line through the axis O, and the slide valve 8 is located at the third position with the support shaft 9 as the fulcrum.
As shown in the figure, it is located at point C, which opens one of the through holes 11a.

Next, when gas enters the rear case 2b of the lower case 2 from the inlet 3 of the upper case 1 through the through hole 11a of the valve seat 7, a driving force is applied to the capsule 10 and the state shown in FIG. 4b is achieved. After that, the state shown in Fig. 4C is reached, but in this case, the small elbow 21 is connected to the large elbow 1.
9, the connecting rod A escapes from its dead center and rotates in the arrow direction about the axis O, and the connecting rod B also escapes from its dead center and rotates in the same manner. At this time, the leaf spring 25 has its tip g connected to the spring arm 27 and the connecting rod C.
The repulsive energy reverses the bow-like curvature.

Then, the connecting rods A and B receive the spring pressure of the leaf spring 25 and rotate around the axis O via the spring arm 27 and the connecting rod C, reaching the state shown in FIG. 4C.
The slide valve 8 moves from point C to point C'', and the passage of the valve seat 7 is switched by the slide valve 8. In FIG. Showing the fully transitioned state, the small armrest 21 and connecting rod A
The valve arm 17 and the connecting rod B are located at their dead centers on a straight line through the axis O, respectively.

Next, when gas flows into the front case 2a of the lower case 2 through the through hole 11b of the switched valve seat 7,
The large armrest 1 is linked to the cyst 10 by the gas pressure.
9 and the small elbow 21, the connecting rods A and B escape from the dead center and rotate in the arrow direction about the axis O as a fulcrum, and the leaf spring 25 is pushed through the connecting rod C and the spring arm 27. At the same time, the spring pressure instantly reverses the state shown in FIG. 4a, and the slide valve 8 returns to point C again.

By repeating the above operation, the through holes 11a and 11b of the valve seat 7 are switched in response to the inflow of gas into the front case 2a or the rear case 2b of the lower case 2. This switching frequency can be adjusted by an appropriate movable function (not shown). The amount of gas flowing into the gas measuring chamber of the lower case 2 can be measured by interlocking with the integrated flow rate indicator 30 via the number of times transmission means.

As explained in detail above, according to the single-membrane gas meter of the present invention, a single membrane is used, and the reciprocating movement of the membrane is transmitted through the large elbow and the small elbow.
This is converted into a rotational movement of the connecting rods A, B, and C, each connected to a leaf spring via a spring arm, and this is further converted into a reciprocating movement of the valve arm, so that the slide valve swings on the valve seat. Since the gas metering display is made by linking the number of movements of the armrest or slide valve, the interlocking mechanism is simple, the operation is stable, and the number of component parts is reduced. Advantages such as the cost required for manufacturing can be reduced and the external size can be made smaller can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway schematic side vertical sectional view of the single membrane gas meter of the present invention, and Fig. 2 is a partially cutaway A of Fig. 1.
-A sectional view, Fig. 3 is a BB sectional view of Fig. 2, and Fig. 4 is an explanatory diagram of the operation of the present invention. When located on the front case side, b indicates the case where the cyst is located at the midpoint between the front case and the rear case. 1... Upper case, 2... Lower case, 2a...
...Front case, 2b... Rear case, 3... Gas inlet, 5... Gas outlet, 7... Valve seat, 8... Slip valve, 10... Capsule, 11a... Through hole, 13... …
Pipe, 14... Central shaft, 17... Valve armrest, 19
...Ojijikane, 21...Kojijikane, 23...Nou Tsubasa,
24... Blade shaft, 25... Leaf spring, 27... Spring arm, 30... Accumulated flow rate indicator, A, B,
C...Connecting rod.

Claims (1)

[Scope of utility model registration request] A lower case 2 consisting of a front case 2a and a rear case 2b airtightly partitioned by a cyst 10.
The valve seat 7 is provided with a gas inlet 3 and a gas outlet 5, and is provided with a valve seat 7 and a slide valve 8 that swings on the valve seat 7 to switch the through hole 11a or 11b of the valve seat 7.
an upper case 1 communicating with the front case 2a or the rear case 2b of the lower case 2 through one of the switched through holes 11a or 11b;
A large elbow 19 that operates integrally with the bladder wing 23 fixed to the membrane 10 is extended into the upper case 1 via the wing shaft 24, and the extending end of the large elbow 19 is It is movably connected to the other end of a small armrest 21 which is movably connected to the end of a movable connecting arm A using the inner pipe shaft 14 erected in the upper case 1 as a support shaft, , the other end of the leaf spring 25 with one end fixed is connected to one end of a spring arm 27, and the other end of the spring arm 27 is connected to the other end of the connecting arm A at a constant level with the connecting arm A. The other end of the connecting rod B is connected to the other end of the connecting rod C which is connected while maintaining an angle, and further maintains a constant horizontal angle with the connecting rod A and is movable about the pipe inner shaft 14 as a support axis. is movably connected to a valve arm 17 whose one end is fixed to the slide valve 8, and when the slide valve 8 is positioned on one side of the valve seat 7, the small arm 21 is connected to the connecting arm A. They are connected to each other so as to be positioned in a straight line through the pipe inner shaft 14, and the reciprocating motion of the membrane 10 is transmitted to an integrated flow rate display meter 3 through a movable frequency transmission means.
A single membrane gas meter characterized by converting and displaying 0.