JPS5939205Y2 - pressure response device - Google Patents

Description

[Detailed description of the invention] This invention relates to a pressure-responsive device using a transfer type diaphragm, and the purpose is to provide a compact device that can control multiple controlled objects in a staggered manner using one pressure-responsive device. shall be.

In order to achieve the above object, the present invention provides a cylindrical inner piston 8 and a cylindrical outer piston 13 concentrically within the two-split cylinder 7, as shown in FIG. A cloth-filled rolling rubber diaphragm Tl between the outer piston 13 and between the outer piston 13 and the cylinder 7;
The diaphragm Tl and T2 are connected to the pressure fluid chamber H of the cylinder 7 by interposing the diaphragm T2.

And the piston rod (operating shaft) 1 is attached to the outer piston 13.
If a member for attaching the diaphragm T1 is formed on the sealing top plate 14, the diaphragm T1 can be attached through the hole 20 made in the top plate.
is communicated with the pressure fluid chamber H.

16 is an O-ring for sealing the piston rod 15 led out of the cylinder, 9 is an output shaft led out of the cylinder from the inner piston 8, and 10 is an air inlet/outlet which also serves as an insertion hole for the output shaft 9 in the figure.

11 is a return spring for the inner piston 8, 17 is a return spring for the outer piston 13, and 19 is a pressure fluid inlet/outlet formed in the cylinder 7.

In the illustrated example, the one shown in Fig. 2 is used as the transfer type diaphragm, and the fabric layer F is placed on the atmosphere side of the cylinder, the rubber layer R is placed on the pressure fluid chamber H (with its sealed top 1 facing inward) The top plate 14 is placed on the top surface 81 of the piston 8, the ped flange portion 5 is airtightly attached to the mating portion of the cylinder 7, the step portion 3 having the mounting hole 4 is placed on the top surface of the outer piston 13, and the top plate 14 is placed on the top surface 81 of the piston 8.
Clamp and secure with bolt 18.

Then, the upper and lower cylindrical parts 2a and 2b are connected to the inner and outer pistons 8,
13 and between the outer piston 13 and the cylinder inner wall surface and bent into a U-shape, a double rolling diaphragm Tl,
T2 is formed.

In the above configuration, it is assumed that the pressure receiving areas of the inner and outer diaphragms T1 and T2 are circular areas AI and A2 passing through the center point of the lower end curve of each diaphragm, respectively, and that they are in the state shown in FIG. Ignoring the weight of 13 and other factors, PXAl-Fl and PXA2 = F2 (however, F1F2 is the reaction force of spring 11.17).

Also, if the radius r of A1 is different from the radius 2r of A2, the spring 17
The reaction force F2 is equal to the reaction force F1 of the spring 11.

Now, when the pressure fluid P1 is applied, the diaphragms Tl and T
2 both try to lower the pistons 8 and 13, but since the force of the inner PIXAI does not act on the outer diaphragm T2, the inner diaphragm T1 eventually moves the piston 8 down while rolling, and the spring 11 is compressed. The reaction force F
When l' is in equilibrium with PIXAI or its lower end of piston 8 hits the bottom of cylinder 7, the full force of PIXA2 acts on outer diaphragm T2, causing outer piston 13
is lowered until the reaction force F2' of the return spring 17 is balanced with PIXA2.

That is, the actuating shafts 9 and 15 move with a time difference.

The operating shaft is linked to a controlled object such as a switch or valve.

When the fluid in the pressure fluid chamber H is discharged after a predetermined operation, the internal
The outer screw 1 hens 8 and 13 are returned to their original positions by the tension of the return springs 11 and 17, respectively.

In the above embodiment, a double piston (inside and outside) is provided, but it is also possible to provide three or four pistons.

Note that instead of feeding the pressure fluid, the air in the spring chambers 11 and 17 (low pressure side L) may be sucked to reduce the pressure.

In this case, the O-ring 16 and the air inlet/outlet hole 10 are of course constructed in an opposite relationship.

Since the present invention has the above-mentioned configuration, multiple piston rods (operating shafts) are sequentially moved at time intervals by one cylinder and force H pressure fluid, so for example, switching motions can be created by opening and closing a valve, etc. A compact device that performs control in a staggered manner can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, and FIG. 2 is a partially cutaway front view of a relocation type diaphragm. 7 is a cylinder, 8 is an inner piston, 13 is an outer piston, TI, T2 are transfer type diaphragms, 9° 15 is a piston rod, 19 is a pressure fluid inlet/output ['', H is a pressure fluid chamber,
11.17 is the return spring.

Claims (1)

[Claims for Utility Model Registration] A plurality of pistons 8 and 13 are arranged concentrically within a cylinder 7, and a relocation type diaphragm Tl is provided between adjacent pistons and between the outermost piston and the cylinder. T2 is provided to divide the inside of the cylinder into a pressure fluid chamber H and an atmosphere side chamber, and the rod of the inner screw I/N 8 is extended from the atmosphere side chamber to the outside of the cylinder cylinder as an output shaft 9, and the top plate of the outer piston 13 is 14, the rod is used as an output shaft 15 to pass through the pressure fluid chamber H airtightly and extend outside the cylinder, and the inner rolling diaphragm chamber S is communicated with the pressure fluid chamber H through the hole 20 provided in the top plate 14, Return springs 11 and 17 are provided on the inner and outer pistons 8 and 13, respectively, and the output shafts 9 and 15 are moved at different times depending on the relative relationship between the strength of these springs and the respective pressure receiving areas of the inner diaphragm TI and the outer diaphragm T2. A pressure-responsive device configured to operate.