JPS584203B2 - Memory Relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bistable pneumatic memory, which includes a first side each receiving two input signals and a second side coupled to an exhaust port and an output conduit, respectively. It consists of a two-plate diaphragm having two sides and a flat poppet arranged in a chamber connected to an output line, said poppet being moved by a first pusher acting on the second side of one of the diaphragms. a first stable position attracted by one of two permanent magnetic bodies disposed on both sides of the first orifice coupled to the exhaust side when closing the first orifice;
When closing a second orifice coupled to the supply pressure side, it can assume either a second stable position, which is attracted by the other permanent magnetic material, and the poppet surface on the side closing said second orifice and the poppet surface on the other side A second pusher is disposed between the second surface of the diaphragm and the second surface of the diaphragm.

This type of pneumatic memory is known, for example, in U.S. Pat. No. 3,818.
, No. 943.

Due to the small space available for the permanent magnets in the device shown in this patent, the attractive force that each magnet can generate is limited and great care must be taken to ensure that the poppet remains on the two seats. Furthermore, it is difficult to select a ratio of both attraction forces to ensure that this memory is activated preferentially when two input signals are applied simultaneously.

This known device places the magnetic poppet in an unfavorable equilibrium such that both orifices remain open at the same time or the poppet remains in a position that commands the output when two input signals are applied simultaneously. Sometimes it happened.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to eliminate the drawbacks of prior art devices in order to ensure that two stable states of the memory are obtained and that the output is not commanded when two signals are simultaneously applied to the two inputs. The object of the present invention is to provide a memory that can reliably perform priority operations.

In the present invention, each magnetic body has a base that is integrated with a permanent magnet.
consisting of two corresponding arms of two identical forks,
At the same time, by changing the cross section of the two arms of the same fork,
This is accomplished by guiding a poppet located between the arms of each fork during its movement on the inner surface of an orifice connected to the exhaust side.

Other features and advantages of the invention will become apparent from the accompanying drawings and the description below.

The plastic housing 1 shown in FIG. 1 comprises two diaphragms 2, 3, each of whose first side 5, 6 is connected to a conduit 7, 8, respectively, for transmitting an input signal.

The second faces 9, 10 of these diaphragms are the discharge ports 1
1 and a chamber 12 communicating with an output line 13, respectively.

The chamber 12 is connected to the discharge side by a first orifice 14 and the supply pressure is applied to the end of the line 16 and into the chamber 12 by a second orifice 15 .

Between both orifices 14.15 these first and second
Seats 18, 19 designed to close the orifice of
Poppets 17 are arranged, each having a.

This poppet 17 passes through the first orifice 14 and is actuated via a first pusher 20 driven by the second side 9 of the diaphragm 2 or via the second side 10 of the diaphragm 3.
The second pusher is driven by the second pusher.

The second pusher is constituted by a plurality of cylindrical rods 22, 23, 24 passing through a wall 25 containing the pressure line 16, and a disk 21.

The magnetic bodies 26, 27 and 28, 29 serve to stabilize the magnetic boppet 17 in two possible positions.

The magnetic bodies 26, 28 or 27, 29 arranged on the same side with respect to the axis of the poppet 17 are constituted by the arms of two forks 30, 31 arranged in parallel, as shown in detail in FIG. Its base is connected to both sides of a permanent magnetic force 32 in the form of a square parallelepiped.

As shown in FIG. 1, since the permanent magnet forms magnetic bodies 26 to 29 at the same time and is eccentric to the axis ZZ' of the poppet 17, diaphragm, and orifice, the dimensions of the permanent magnet are made considerably large. can,
Additionally, the presence of two magnetic conductors improves its operation.

Figures 1, 2 and 3 show that the cross-sectional area of each arm 26, 27 is different from the cross-sectional area of the other arms 28, 29.

Furthermore, as is clear from FIGS. 1 and 2, a cylindrical guide rod 33 protrudes from the poppet 17.
3 is inserted into the bore 34 of the tubular member 35.

A groove 36 is cut in the outer surface of the tubular member 35, and the tubular member 35 is configured to slide within a cylindrical surface 37 extending from the first orifice 14.

Also within the bore 34 of the tubular member 35 is a cylindrical shank 38.
The shank 38 is integrated with a disc 39, and the shank 38 and the disc 39 constitute the first pusher 20.

By making the permanent magnet 32 eccentric, its volume can be increased, resulting in a stronger attractive force being applied to the poppet 17 by the magnetic arms 26-29.

Furthermore, by varying the cross-sectional area of the magnetic bodies 28, 29, the poppet 17 can be adjusted as shown in FIG. is given a theoretical equilibrium position (between the magnetic attraction forces on both sides) closer to the first orifice 14 than to the second orifice 15.

This equilibrium position A is determined by the total reluctance or reluctance created by the legs and the air gap on each side of the poppet.

The priority operation that commands zero output to the output orifice when there are two input signals is explained as follows: First, these two input signals come from different pressure sources, so their characteristics are follow different pressure fluctuation rules, so the two input signals never really arrive at exactly the same time, one signal always arrives before the other.

Now, assume that pressure is first applied to diaphragm 2 and that the same pressure is also generated on diaphragm 3.

Since the diameters of the two orifices are made identical, the poppet, already in the position shown in FIG. The poppet does not move since the suction force of is already sufficient to maintain the poppet in said position.

Conversely, when pressure is first applied to the diaphragm 3, the poppet 17 occupies the position 17' shown in dotted lines in FIG.
~24 does not press the poppet.

When a pressure signal is then applied to the diaphragm 2, the poppet moves away from the closed first orifice 14 and reaches a position very close to said equilibrium point A before the supply pressure on the second side 10 of the diaphragm completely dissipates. and rapidly move toward the second orifice.

Movement of the poppet toward the second orifice is facilitated by an increase in magnetic attraction, and a weak force is applied to the poppet by pushers 21-24 for this movement of the poppet.

The system now finds the first stable state mentioned above and remains in this state forever thereafter.

By transmitting a sudden movement to the poppet and at the same time disproportioning the suction force created by the fork arm (
In fact, it is impossible to ensure that the resultant magnetic and aerodynamic forces applied to the poppet always pass through its center of gravity during its movement.)
, it is possible to generate a torque that is added to the suction force created by the percussion force across the poppet if it were not guided as described above.

It has been found that said guiding means, which was unnecessary in the prior art due to the rotational symmetry of the permanent magnets, is a prerequisite for reliable closure of the boppet.

Furthermore, because the poppet moves between polar surfaces machined from the same part, the uniformity of its stroke is maintained.

The side forks 30, 31 and the permanent magnets 32 connected to them are arranged in the housing 40 with a small gap to eliminate the risk of the forks coming into contact with the permanent magnets due to distortions in one of these parts. and the boppet has a polar surface 41, 42 or 43 on the supplementary arm of each fork;
44 are not pressed at the same time.

Since the housing communicates with the chamber 12 connected to the output line 13, the housing is closed with a cover 45.

Communication between the chamber 12 and the second side of the diaphragm 3 is achieved by the gaps between the pushers 22-24 and their supporting wall surface 25.

Adjust the release time of the fluid on the second side of the diaphragm,
The dimensions of the gap can be varied to effect the preferential operation described above.

A manual control device 46 is provided for experimentally generating one of the command signals, and a pressure pilot 47 is provided to indicate the pressure within the chamber 12 in order to allow external observation of the output command. It has become.

Additional Relationships The present invention is an invention in which the main parts are essential to the structure of the patented invention of Patent No. 927404, and achieves the same object as that patented invention. .

[Brief explanation of the drawing]

Figure 1 shows a plane XX' passing through the axes of the two diamond floes.
A cross-sectional view along. FIG. 2 is a sectional view taken along the YY' plane of FIG. 1. FIG. 3 is a perspective view of the magnetic system and valve. FIG. 4 is an explanatory diagram of the suction force applied to the valve. reference sign,
1... Housing, 2, 3... Diaphragm, 5, 6... First surface, 7, 8...
・Input signal conduit, 9, 10...Second surface, 11・
...Exhaust port, 12...Chamber, 13...
...output pipe line, 14...first orifice,
15... Second orifice, 16... Pressure pipe line, 17... Poppet, 18, 19, . ．．
．． ．． ．． Sheet, 20... 1st pusher, 21
...Disc, 22-24...Cylindrical rod, 2
6,27...magnetic material, 28,29...
Magnetic material, 30, 31...Fork, 32...
...Permanent magnet, 35...Tubular member, 37...
...Cylindrical surface, 41-44 ...Polar surface, 4
6...Manual control device, 47...Pressure pilot.

Claims (1)

[Claims] 1 two diaphragms each receiving an input signal on a first side and connected to each output line and a discharge port on a second side; and a flat valve disposed in a chamber connected to the output line. When closing the first orifice connected to the exhaust side by the first pusher, which is acted on by the second surface of one diaphragm, the flat valve closes the first orifice, which is made up of two permanent magnetic bodies placed on both sides of the first orifice. It can take either a first stable position in which it is attracted by one, or a second stable position in which it is attracted by the other permanent magnetic body when closing a second orifice connected to the supply pressure side, said second orifice being In each bistable pneumatic memory having two inputs and one output, a second pusher is arranged between the face of the valve on the closing side and the second face of the diaphragm on the other side. The magnetic body is constituted by two corresponding arms 26, 27, 28.29 of two identical forks 30.31 whose bases are integrated with a permanent magnet 32, the two arms of the identical forks having a cross section. It is different,
Poppet 1 placed between both arms of each fork
7 is a first orifice 14 connected to the discharge side during the movement.
A bistable pneumatic memory characterized in that it is guided by an inner surface 37 of.