JPS60205206A - Position detection apparatus - Google Patents

Abstract

PURPOSE:To attain to enhance the reliability of the titled apparatus used in nuclear power circumferential machineries, by detecting the predetermined position of a moving object by a mechanical hydraulic transmission mechanism and transmitting the change in pressure of a detection part to an air pressure switch. CONSTITUTION:A detection mechanism is constituted of a position detector 1 having a non-compressed fluid received therein and detecting an object A to be detected, a pressure balancer 8 having a detection position adjusting screw 8a, an accumulator 4 keeping the internal pressure in a pressure transmission system constant, a check valve 5 and a pressure switch 3 and these constitutional elements are connected by a pressure transmission pipe 2. When pressure detected by a position detector 1 reaches definite pressure, the pressure switch 3 provided in air is operated to control a drive machine C for operating the object A to be detected and to issue the predetermined position arrival signal of the object A to be detected. By this mechanism, the change in an external environment is excluded to obtain high accuracy and reliability can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a position detecting device, and more particularly to a position detecting device that can be applied to detecting the position of a used BPRA volume reduction device, a submerged moving object, etc.

Conventionally, for example, there are underwater limit switches, air sensors, etc. as position setting devices for moving objects used underwater. Among these, underwater limit switches are generally used in the air. coated, pressure resistant,
It is a heavy device that helps prevent the effects of water, temperature, etc. 9, and it is rated 11 for long-term value due to the sole quality and durability of the 1% drawer part! It has poor reliability and often causes problems. Furthermore, it is difficult to directly set the detection point of the underwater limit switch 4 at a very small position, and it becomes even more troublesome when submerged in water.

On the other hand, when a large number of air sensors are used, a large amount of air bubbles are generated, which makes them difficult to use in environments where the generation of air bubbles is undesirable (for example, poor reception of images in underwater televisions).

In addition to the above, there are also electrical proximity switches, for example, but they have the disadvantage of being less concentrated when used underwater.

The present invention has been proposed in view of the above circumstances, and its purpose is to improve the inclination of underwater detection devices used for nuclear peripheral equipment, etc., so that they can easily operate underwater. It is an object of the present invention to provide a position detecting device which allows fine adjustment of operating pressure and detection position, whose detection ability is not affected by external water pressure and water temperature, and which can withstand permanent use.

The position detecting device according to the present invention includes a piston cylinder assembly with a granger metal protruding toward an underwater moving body, a pressure switch connected to a pressure chamber of the assembly through a pressure propagation tube r valve, and the pressure switch It is characterized by being equipped with a pressure accumulator connected to the pipe via a check pulp and filled with a non-pressure fluid, and a pressure regulator connected to the pressure regulator, and an electric device is installed in the position detection section. Without using it, a mechanical hydraulic pressure propagation mechanism detects when the moving wJ object reaches a predetermined position, and the position ++IN! !
It is a mechanism that connects four pressure switch parts installed in the air from the beginning, and transmits the pressure quality of the detection part to the air pressure switch by pressure propagation U containing liquid. An accumulator and a balance syringe are installed to fully adjust the volume fluctuations and adjust the pressure fluctuations in the pipe due to outside water temperature, outside water pressure, resistance inside the propagation pipe, etc., and to set the accumulator position to the pressure position, as described above. This is a version of the conventional entry point t-w that can be used for 4 nights.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The figure shows the configuration of an embodiment of the present invention. 1 is a position detector, 1a is a cylinder, 1b is a spring, IC is a plunger, 2 is a pressure propagation, 13 is a pressure switch, 4 is an accumulator, and 5 is a A check valve, 6 is an accumulator pressure control valve, 7 is a balance cylinder pressure control valve, 8 is a pressure balancer, 8a is a detection position adjustment screw, 8b is a balance cylinder,
8c is a piston, 8d is a counter pressure chamber, 8e is a variable pressure vI4 adjustment, 1tt is a distance traveled by the object to be detected after contacting the detection device, t2 is a detection position adjustment heron, A is a position of the object to be detected, and B is a Solenoid, C is a detection object drive device, D is an accumulator pressure source, E is a pressure balun length pressure source, F is a water tank, G is a detection object control valve, and H is a detection object drive device pressure source. .

In one embodiment of the present invention shown in the above figure, it is assumed that the position-detected object person is operated in the water tank F, and the position detector 1 can also be used to arbitrarily stop the position-detected object A in the moving direction of the water tank F. It is designed to be installed in a certain position. The position detector 1 is pushed into a housing in the direction of movement of the position detection device A by a position detection device object A that contains an incompressible fluid, and is inserted into a cylinder In.
A plunger IC transmits the arrival of the position detected object A to a predetermined position to the pressure switch 3 via pressure propagation -1if,"f- by compressing the incompressible fluid contained in the position detected object A, and It is constituted by a spring 1b that returns the plunger Ic to its original position and extrusion when it is separated from the attached position 111.The pressure balancer 8 has a piston 8c' (squeal ,
This piston 8c is the boundary between the variable pressure adjustment chamber 8e, which absorbs an arbitrary amount of the pressure propagated from the position generator 1, and the variable pressure adjustment chamber pressure (regulating chamber normal internal pressure (reverse pressure chamber pressure)). The piston 8c moves toward the detection position adjustment screw 8a (the propagation pressure is 1, the normal internal pressure is 2, and the internal pressure is 2) due to the pressure propagated from the position detector 1. It is configured by a detection position al11 setting screw 8a that regulates the amount of movement, and a pressure source of pressurized fluid and a pressure balancer pressure source E are connected to the counterpressure chamber 8d, and this supply pressure is controlled by a balance cylinder pressure control valve 7. and set the internal pressure in the counterpressure chamber.

The accumulator 4 is filled with the same incompressible fluid as in the pressure propagation system and is supplied from the accumulator pressurizing source, and the pressurized fluid whose pressure is regulated by the accumulator pressure control valve 6 is used to fill the incompressible fluid in the accumulator tie. pressurizes the sexual fluid;
The internal pressure of the pressure propagation system is maintained at a constant pressure. Further, a check valve 5 is provided downstream of the accumulator 4 to prevent pressure propagated from the position detector 1 from escaping to the accumulator 4 side.

The pressure propagated from position detector 1 is constant (arbitrary setting)
When the pressure switch 3 installed in the air is activated, the detected object driving machine C that operates the position of the detected object is actuated.
The port of the detected object control valve G is switched by energizing the solenoid B of the detected object control valve G that controls the detection object control valve G. The above position detector 1, pressure switch 3, accumulator 4, check valve 5,
A position detection device #4 is constructed by interconnecting pressure balancers 8 through pressure propagation tubes 2, respectively.

The operation of one embodiment of the upper m1 lining will be explained in detail.

In the figure, the initial storage is the water pressure of the prFi water pipe, P2 is the pressure body (initial pressure inside the 11 pipe, PJ is the pressure in the reaction pressure chamber, P4 is the accumulator pressure, P5 is the pressure at the pressure switch, P6 is
is the check valve opening pressure, P7 is the operation of the secret machine C, ΔP is the internal pressure of the water tank or the increased pressure in the pressure propagation system due to the increase in silver outside the detection device, and P2' is the pressure propagation after the pressure increase due to the detected object A. Pipe pressure, F is the spring force in the position detector, AI is the accumulator receiving pressure volume, A2 is the position detector sylanger area, A3
If f′i is the pressure balancer piston thI product, A4 is the granular area of the target object, and A5 is the shear area of the plunger rod of the target object, then the initial internal pressure of the pressure propagation system P2F′i,
Pressure of accumulator 4) Monthly result of fluid pressure P4 regulated by groaning valve 6 and pressure receiving area A1 of accumulator 4 V
(determined by G, which can be expressed as P2 = P4 , pressure propagation/g initial pressure P2 is always maintained at the initial set pressure.

On the other hand, the fluid pressure P3 of the pressure balancer pressurized gw, which is supplied to the counterpressure chamber 8d of the pressure balancer 8 and which is regulated by the balance cylinder pressure side 910 valve 7, is set to the pressure body +4 as the counterpressure chamber pressure. -1 is set to be slightly larger than the internal initial pressure, that is, the pressure regulating chamber pressure P2 of the pressure balancer 8, and smaller than the increased pressure (P2 + ΔP) of the pressure propagation pipe internal pressure due to the increase in water pressure in the water tank F or the increase in the ambient temperature of the position detection device. be done. That is, in the figure, when there is no temperature rise, the piston 8c is pressed against the left end of the balance cylinder 8b, and when the temperature rises, the piston 8C moves to the right and the fluctuating pressure 11 is adjusted 8e.
It is balanced and stops at the point where the pressure in the counterpressure chamber 8d and the pressure in the counterpressure chamber 8d become equal. In addition, regarding the decreasing side of the pressure propagation pipe internal pressure P2, as described above, υ is reduced to the initial pressure vI4M by the accumulator 4.

The set pressure P5 of the pressure switch 3 is set to be larger than the fluctuating pressure (P2+ΔP) in the pressure propagation pipe, and has the following relationship.

p 1ap2<PJ<P, 2+ΔP<P5...Initial setting conditions for each device Note that the fluctuating pressure ΔP is determined when the piston 8c of the pressure balancer 8 is at P
2. When the pressure is increased, the pressure is increased by retreating to the counterpressure chamber 8di1411 to increase the internal volume of pressure transmission and g, and in order to substantially absorb the pressure increase, the pressure is not increased. Boosting filter is PJ-P
The position detection device using only a differential pressure of 2 is almost unaffected by changes in the external environment.

Next, position detection according to an embodiment of the present invention will be described.

fXLtt When the habituated object A is actuated by the same drive machine C and reaches the position 11 detector l, the granger 1 of the position detector l
ct-push. As a result, the non-pressure radiant casing of the pressure propagation system is pressurized, pressure is transmitted to the pressure switch 3, and the set pressure P5
When the pressure reaches the predetermined position, the pressure switch 3 is activated and a signal indicating that the position detection object A reaches a predetermined position is issued.

The operation flow of the position detecting device on the Soki-Sou layer side of the present invention will be described in detail below.

The position where the position detected object A reaches and contacts the tip of the plunger IC of the position detector 1 [as the base point, the distance from the base point 7 to the position detected object A reaching a predetermined position (the stopping point of the position detected object A) Let t be t, then the volume change inside the position detector is t1
×A2 (position detector pusher surface). Fluctuation pressure Δ
The piston 8c of the pressure balancer 8, which absorbs P, retreats to absorb this volume change, but if this retreat t is t2, then 1 tfXA2=t2XAJ (piston 78 e (7) area).

That is, the incompressible fluid pushed by the position detected object A is the fluctuating pressure 14 of the pressure balancer 8! 8eVC flows into the I chamber, and the volume change is absorbed. However, the piston 8c whose retreat mt2 is regulated by the detector tmi screw 81L is the same m! When it reaches the tip of the screw 8a, it is no longer possible to retreat and absorb volume changes, so t 1 xk2
') t2× becomes 3 and pressure propagation d Internal pressure P2 increases (
P2').

The pressure switch 3 is activated by this P2'.

In other words, by adjusting the retraction amount t2 of the piston 8C of the pressure balancer 8 with the lateral protrusion adjustment screw 8, it is possible to arbitrarily set the position detection angle 1i1 of the position detection object A, and also to adjust the position detection angle 1i1. It becomes possible to absorb and adjust changes in pressure propagation and U internal pressure other than the action of the detection body A.

According to the book'+6, the following customized effects can be applied.

(1) By providing an accumulator and a pressure balancer in the position detection mechanism, it is possible to absorb the fluctuating pressure inside the position detection device due to changes in the external environment, which prevents the original purpose of position detection by pressure detection. A pressure detection type position detection device based on the degree of lateralization can be obtained.

(2) By installing a detection position ai4 adjustment screw on the pressure balancer and controlling the movement of the piston inside the pressure balancer,
It is now possible to arbitrarily place the detection point '1a14,
Even if the object to be detected and the position detector are submerged in water, for example, settings can be changed and minute adjustments can be made remotely.

(3) Since the position detection device itself does not use any electrical equipment, the 1g request is the same as above.

[Brief explanation of drawings]

The figure is a diagram showing the configuration of an embodiment of the present invention. I...Position detector, 1&...Cylinder, 1b...
Spring, lc...Silanger, 2...Pressure propagation tube, 3
...Pressure switch, 4...Accumulator, 5...
・Check valve, 6... Achiemulator pressure control valve, 7...
- Balance cylinder pressure control valve, 8... Pressure balancer, 8a... Detection position adjustment screw, 8b... Balance cylinder, 8c... Piston, 8d... Counter pressure chamber, Be
...Fluctuating pressure adjustment chamber, A...Position detected object, F...
Aquarium.

Claims (1)

[Claims] A piston cylinder assembly with a granger T protruding toward the underwater moving body and pressure propagation in the pressure chamber of the assembly.
1, a pressure accumulator connected to the propagation tube via a check pulp and containing an incompressible fluid, and a pressure vI4 node connected to the propagation tube. A position detection device characterized by: