DE202009003748U1 - Valve with detection device - Google Patents

Abstract

Valve with a detection device having a light emitter and a light receiver between which an arranged at the fluid outlet of the valve optical measuring section is formed, which traverses the fluid flow path.

Description

The The invention relates to a valve with a detection device, the a light emitter and a light receiver between which a arranged at the fluid outlet of the valve optical measuring section is formed, which is the fluid flow path crosses.

Known Detection devices are based on different sensor principles such as pressure or flow measurement, are often within a media stream arranged and allow, for example, a control of the valve function.

The Detection device of a valve according to protection claim 1 operates non-contact by means of an optical process, and according to claim 7 in line sections. Advantageous embodiments are in the subclaims specified.

in the Fluid outlet of a valve or in a line section are a light emitter and a light receiver arranged so that the emitted light this and the medium irradiated and then detected and evaluated.

The Detection device can be in a valve or a line section be integrated in a simple way, which has the advantage that existing devices also retrofitted at any time can be.

In addition to Detection of the valve function can other parameters concerning the medium properties, such as type, Quantity or concentration are recorded, which is based on the principle the change the refractive index by a fluid in a transmission or Reflection arrangement based.

So can For example, in valves different states regarding valve and / or Medium recorded and monitored be like open or closed position, Leakage in closed position, Duration of a rinsing cycle with a cleaning liquid like that like cloudiness due to changes / decomposition of the Medium.

One Application of the detection device is the tightness monitoring valves used to control fluids. through electronic control, the light source can be switched on, when the valve is in the closed state. With proper valve operation, then the light emanating from the light emitter does not pass through it liquid filled Fluid outlet, so air. The light absorption is detected by the detector. If leakage occurs the light in addition Traverse fluid, what a measurable absorption change equivalent. A suitable signal evaluation software provides when occurring absorbance change for one Error message.

details The detection device will be described below with reference to the drawings described. Show it:

1 Valve with detection device

2 Valve with detection device such as 1 turned 90 ° and cut

3 Line section with detection device (cross section)

4 Line section with detection device (perspective view)

In the 1 and 2 a first embodiment of a valve with detection device is shown. The valve essentially consists of the drive 1 and the housing 2 ,

Light shines from a light transmitter, here the optical fiber 5 , in the fluid outlet 3 of the valve, traverses this and is from the light receiver, the detector 4 detected, being between the end of the optical fiber 5 that is in the fluid outlet 3 protrudes, and the detector 4 forms an optical measuring path.

In the valve housing 2 recesses are arranged around the optical fiber 5 and the detector 4 take. The valve housing can either already be made so that the recesses are formed there, or these are subsequently introduced z, B, in the form of holes in the valve housing.

These Recesses can sealing z. B. by casting resin be closed.

It is possible, too, a light source (LED) directly in the valve housing to install, with the electrical contacts outside lie.

Especially but in very small miniaturized valves it is advantageous To couple light by means of optical fiber in the fluid outlet, since these are commercially available in much smaller diameters as corresponding LEDs.

The detector 4 is preferably a photodiode and outputs to an evaluation unit measuring signals corresponding, for example, the absorption of the medium.

If the detection device for Erken Inserted leakage, it is arranged in the fluid outlet near the valve seat in such a way that the optical measuring path also crosses that part of the fluid flow path, which is located at the lowest.

The Evaluation unit gives an error message when changing the absorption out.

In a further embodiment, the detection device is as in 3 and 4 shown on a line section 6 arranged, which forms an annular intermediate part. The pipe section 6 is connectable to the fluid outlet of the valve and connects to it.

The annular Intermediate part with detection device can not only in valves be applied, but also generally in medium leading Line sections that monitors should be. The detector detects in a transmission or Reflection arrangement a fluid traversing light signals by means of Evaluation electronics media properties, such as concentration of constituents, be assigned.

In over- or If the value falls below defined values, an error message can be output become.

1

drive

2

casing

3

fluid outlet

4

detector

5

optical fiber

6

line section

Claims (9)

Valve with a detection device, the one Light transmitter and a light receiver between which one arranged at the fluid outlet of the valve optical measuring section is formed, which is the fluid flow path crosses. Valve according to claim 1, wherein the light receiver a Detector signal, the representative is for Quantity and / or type of fluid traversed by the optical measuring section, and the detection device has an evaluation unit which evaluates the detector signal and a corresponding display signal outputs. Valve according to claim 1 or 2, wherein the optical Measuring section and that part of the fluid flow path traverses, the lowest is located. Valve according to one of claims 1 to 3, wherein the light emitter and the optical detector in recesses of the fluid outlet of the Valve surrounding wall are added. Valve according to one of claims 1 to 3, wherein the light emitter and the light receiver on an annular Intermediate part are arranged, which at the fluid outlet of the valve followed. Valve according to one of the preceding claims, at the light transmitter has an optical fiber whose outer end is coupled to a light source such as LED or laser and their inner end into the fluid flow path irradiates. Valve according to one of the preceding claims, wherein Fluid properties are recorded, which are based on the principle of change the refractive index by a fluid in a transmission or Reflection arrangement based. Line section for fluids with a detection device, which has a light emitter and a light receiver, between which an optical measuring section is formed, which is the fluid flow path traverses, wherein the detection device at an annular intermediate part is arranged, which is integrated in the line section. A conduit section according to claim 8, wherein fluid properties which are based on the principle of change of the refractive index a fluid in a transmission or reflection arrangement based.