JPH0777452A - Displacement quantity measuring device and inclination measuring device for anhydrous gas holder piston - Google Patents

Abstract

PURPOSE:To continuously measure the displacement of an object and the inclination of a gas holder piston without installing an electric apparatus possibly becoming an explosion/ignition source in a dangerous area near the object. CONSTITUTION:This displacement quantity measuring device is provided with an operation section 13 interlocked with the displacement of an object and nonelectrically operating a transmitted light quantity changing member 7 in response to the displacement quantity, a light projection section 5, a light reception section 6, the transmitted light quantity changing member 7 arranged between the light projection section 5 and the light reception section 6 and changing the transmitted light quantity in response to the operation of the operation section 13, and a detection section 4 detecting the displacement quantity. A light emission section 1 and a measurement section 9 are provided in a remote safe area outside the detection section 4, and the light projection section 5 in the detection section 4 is connected to the light emission section 1 and the light reception section 6 in the detection section 4 is connected to the measurement section 9 with optical fiber cables 21, 23 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is particularly useful for safely and continuously measuring the amount of displacement such as a liquid level in a place where there is a danger that flammable gas, vapor, etc. are present in the vicinity of a gas holder. The present invention relates to a displacement amount measuring device that can be used for the above and a tilt measuring device for a piston for an anhydrous gas holder using such a device.

[0002]

2. Description of the Related Art Conventionally, for example, when measuring the oil level of seal oil on the outer circumference of a piston inside an anhydrous gas holder, an operator manually measures and checks the level. The air chamber has a bad working atmosphere,
This method does not allow continuous measurement. Continuous measurements are essential to maintain safe operating conditions.

[0003]

Therefore, there has been proposed a method in which an electric oil level measuring device is installed on the outer peripheral portion of a piston in a gas holder, and an oil level signal is taken out and measured. However, even though the air chamber in the gas holder is partitioned by the piston, it is always exposed to flammable gas, so it is not possible to install it inside an apparatus that has an electrical component that can become an explosion fire source. It should be avoided as much as possible. The same applies to the case where the electric oil level measuring devices are installed at a plurality of positions on the outer circumference of the piston in the gas holder and the oil level signals at the respective positions are taken to measure the inclination of the piston.

The present invention provides a displacement capable of continuously measuring the displacement of an object without installing the device having the electric parts as described above in a dangerous area near the object which becomes an explosion fire source. It is an object of the present invention to provide a quantity measuring device and a device capable of measuring the inclination of the anhydrous gas holder piston using such a device.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to achieve the above-mentioned object, and is provided with an electric means for interlocking with the displacement of an object and changing a transmitted light amount variable member according to the displacement amount. It has an actuating part that is operated without using it, a light projecting part, a light receiving part, and a transmitted light amount variable member that is arranged between the light projecting part and the light receiving part and that changes the transmitted light amount according to the operation by the operating part. Displacement that includes a detection unit and a light emission unit and a measurement unit that are provided remotely from the detection unit, and that connects the light emission unit and the light emission unit in the detection unit and the light reception unit and the measurement unit in the detection unit with optical fiber cables, respectively. It is a quantity measuring device.

Furthermore, an operating portion that interlocks with the displacement of the seal oil on the outer peripheral portion of the piston inside the gas holder and that operates the transmitted light amount varying member according to the displacement amount without using electrical means, and a light projecting portion, A detection unit having a light receiving unit and a transmitted light amount variable member that is arranged between the light emitting unit and the light receiving unit and that changes the transmitted light amount according to the operation of the actuating unit, and at least three locations on the outer peripheral portion of the piston. It is equipped with a detector for detecting the amount of displacement of the seal oil at the above position, a light emitting unit and a measuring unit provided outside the detecting unit, and a light emitting unit in the detecting unit and a light receiving unit in the detecting unit and measuring. It is an inclination measuring device for a piston for a waterless gas holder, which is connected to each part by an optical fiber cable.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of a displacement amount measuring device of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a basic configuration of a displacement measuring device for a seal oil level in a gas holder, FIG. 2 is a side sectional view showing a configuration around a piston outer peripheral portion and a detecting portion in a gas holder 31, and FIG. FIG. 4 is a perspective view illustrating the light amount variable member 7, and FIGS. 4 and 5 are explanatory views of the operation of the transmitted light amount variable member 7.

In FIG. 1, a detection unit 4 includes an operating unit 13 that interlocks with the displacement of the seal oil level as an object, a light projecting unit 5, and
The light receiving unit 6 and the transmitted light amount varying member 7 arranged between the light projecting unit and the light receiving unit to change the transmitted light amount according to the operation of the actuating unit 13 are arranged in the gas holder. . The light emitting unit 1 and the measuring unit 9 are installed in a remote safety area outside the detecting unit 4, and the light emitting unit 1 and the light projecting unit 5 inside the detecting unit 4 are installed.
Are connected via the spectroscope 3 by the optical fiber cable 21, and the measuring section 9 and the light receiving section 6 in the detection section 4 are connected via the switch 8 by the optical fiber cable 23.

As described above, no electrical equipment is provided in the gas holder, which is a dangerous area, and only the detecting portion 4 including the operating portion, the transmitted light amount varying member, the light emitting portion, and the light receiving portion is installed, and the optical fiber is provided. Since it is connected to external electrical equipment by cables, there is no danger of becoming an explosion fire source.

As shown in FIG. 2, the detector 4 is provided in the gas holder 31, and is interlocked with the displacement of the oil level of the seal oil 33, which is the object on the outer circumference of the piston 32 inside the gas holder 31. It has an operating part 13. In the present embodiment, the float 14 is used as shown in the drawing, and the float is connected to the transmitted light amount variable member in the case 16 using the connecting rod 15 and other appropriate members, and the float 14 is changed according to the displacement amount of the oil level of the seal oil 33. Thus, the transmitted light amount varying member 7 is mechanically operated. Reference numeral 17 is a seat cushion for inspection, 31a is a gas holder side plate, 34 is a partition canvas, 35 is a main canvas, 36 is a sliding plate, 37 is a hanging fitting, 38 is an air chamber, and 39 is a gas chamber.

As the transmitted light amount variable member 7 arranged between the light projecting portion and the light receiving portion, for example, the material is uniform and the thickness is as shown in FIG.
It is possible to use a material which is continuously changed as shown in FIG. 2 or an appropriate plate material which has a uniform thickness and has a continuously changed light transmittance. Such a transmitted light amount variable member 7 is
As shown in FIG. 4, when the operation section 13 is arranged between the light projecting section 5 and the light receiving section 6 and operates in response to the movement of the operating section 13 that is interlocked with the displacement, the projection section 5 projects the image along with this operation and movement. The amount of transmitted light passing through the transmitted light amount varying member 7 continuously changes according to the amount of displacement, and the amount of light received entering the light receiving unit 6 continuously changes.

When a prism or the like is used as the transmitted light amount varying member 7, this is used as shown in FIG.
If it is arranged between the light receiving unit 6 and the light receiving unit 6 and is rotated according to the movement of the actuating unit, the light incident on the prism is transmitted at a constant rate. It continuously changes according to the amount, and the light amount to the light receiving unit 6 changes continuously.

The operation of the above embodiment will be described. The light emitted from the light source 2 of the light emitting section 1 is dispersed by the spectroscope 3, passes through the optical fiber cables 21 and 22, and the light projecting section 5 in the detecting section 4 respectively. To the switching device 8. The light projected from the light projecting unit 5 passes through the transmitted light amount variable member 7 and enters the light receiving unit 6. The incident light on the light receiving unit 6 further passes through the optical fiber cable 23, and is sent to the measuring unit 9 via the switch 8. On the other hand, the light emitted from the light source, dispersed by the spectroscope 3, and passed through the switching device 8 is directly sent to the measuring unit 9.

In the measuring unit 9, the amount of light emitted directly from the light source 2 and the amount of light received by the transmitted light amount varying member 7 in the detecting unit 4 are measured by the optical power meter 10 to obtain the amount of dimming. The arithmetic unit 11 performs arithmetic processing based on data such as a calibration curve to calculate a displacement amount, and outputs the displacement amount to the displacement output unit 12 for display. Furthermore, a monitoring and alarm device may be provided if necessary.

An embodiment of the displacement amount measuring device of the present invention has been described above, but the present invention is not limited to the above embodiment, and for example, the type of the transmitted light amount varying member and the operating method thereof depending on the operating portion. Etc. are not limited to those described above, and may be operated by using a transmission means using a liquid or the like as a medium. Further, in the present device, it is possible to use a power source or an electric component for the detection unit located near the object. It can be applied as various displacement amount measuring devices under other unfavorable conditions.

Next, an embodiment of the inclination measuring device for a piston for a waterless gas holder according to the present invention will be described with reference to the drawings. FIG. 6 is a basic configuration diagram of an inclination measuring device for a piston for an anhydrous gas holder according to an embodiment, and FIG. 7 is a side view schematically showing the same device.

In FIGS. 6 and 7, the detecting portion 4 is provided at four positions which divide the circumference of the piston 32 in the gas holder 31 into quarters. The detection unit 4 is interlocked with the displacement of the seal oil on the outer periphery of the piston in the gas holder, and operates the transmitted light amount variable member according to the displacement amount without using electrical means, and the light projecting unit. The light receiving unit and the transmitted light amount variable member that is disposed between the light emitting unit and the light receiving unit and that changes the amount of transmitted light in accordance with the operation of the actuating unit are configured by using a float. However, the detection unit 4 in the displacement amount measuring device described and shown in FIG.
And its respective constituent parts are the same as those of the first embodiment, so that the illustration and detailed description thereof will be omitted.

Since the piston 32 moves up and down depending on the amount of gas in the gas chamber 39, a winding device 40 is installed above the gas holder 31, and the optical fiber cable follows the vertical movement of the piston 32. .

The measuring unit 9 is installed in a remote safety area outside the detecting unit 4, and the measuring instruments 9a, 9b, 9c, 9 in the measuring unit 9 are installed.
d is a light receiving part in each detecting part 4 is an optical fiber cable 2
Connected by three. Note that, similarly to the displacement amount measuring device shown in the previous embodiment, the light emitting part and the light projecting part in the detecting part 4 are connected by an optical fiber cable, and a spectroscope or a switching device can be interposed (not shown). ).

As described above, the gas holder 3 in the dangerous area
No electrical equipment is provided inside 1, and only a detection portion 4 including an operating portion, a transmitted light amount varying member, a light emitting portion, and a light receiving portion is installed, and is connected to an external electrical equipment by an optical fiber cable. Therefore, there is no danger of becoming an explosion fire source.

In this embodiment, the displacement amount of the seal oil at least at three or more positions in the oil groove on the outer peripheral portion of the piston 32 is detected by the detecting portion 4 and sent to the measuring portion 9 as an optical signal. In the measuring unit 9, the dimming amount is measured by the measuring devices 9a, 9b, 9c, 9d, and further, the oil level or displacement amount of the seal oil at three or more positions on the outer peripheral portion of the piston 32 is calculated by the computing unit 11. At the same time, the inclination of the piston 32 is calculated and calculated. Furthermore, it outputs to the output part 12 and displays continuously. As a result, continuous monitoring can be performed, an automatic alarm device can be configured, and trend management can be performed by collecting cover history based on this data.

[0022]

As described above, the displacement measuring device and the inclination measuring device for the anhydrous gas holder according to the present invention are provided with a detecting portion located in a dangerous area near an object which becomes an explosion fire source. Since it is possible to continuously measure the displacement of the object or the inclination of the piston without using any electric parts, it is extremely effective in ensuring safety.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of an embodiment of the present invention.

FIG. 2 is a side cross-sectional view showing a configuration in the vicinity of a piston outer peripheral portion and a detection portion in a gas holder 31.

FIG. 3 is a perspective view illustrating a transmitted light amount variable member 7.

FIG. 4 is an explanatory diagram of an operation of a transmitted light amount variable member 7.

FIG. 5 is an explanatory diagram of an operation of a transmitted light amount variable member 7.

FIG. 6 is a basic configuration diagram of an inclination measuring device for a piston for an anhydrous gas holder.

FIG. 7 is a side view schematically showing an inclination measuring device for a piston for an anhydrous gas holder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 light emitting part 3 spectroscope 4 detecting part 5 light emitting part 6 light receiving part 7 transmitted light amount variable member 8 switching device 9 measuring part 13 actuating part 14 float 24, 22, 23 optical fiber cable 31 gas holder 32 piston 33 sealing oil

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ken Yamashita No. 1 Kyushu Town, Sakaide City, Kagawa Prefecture Sakaide Factory, Mitsubishi Chemical Corporation

Claims (2)

[Claims] 1. An operating unit, which interlocks with the displacement of an object and operates a transmitted light amount varying member according to the displacement amount without using electrical means, a light projecting unit, a light receiving unit, and a light projecting unit. A detection unit for detecting the displacement amount, which has a transmitted light amount variable member which is disposed between the light receiving unit and which changes the transmitted light amount according to the operation by the operation unit, and a light emitting unit and a measurement device provided outside the detection unit and remote. A displacement amount measuring device comprising a light emitting part and a light emitting part in the detecting part, and a light receiving part in the detecting part and a measuring part, each of which is connected by an optical fiber cable. 2. An actuating portion, a light emitting portion, and a light receiving portion, which are interlocked with the displacement of the seal oil on the outer peripheral portion of the piston in the gas holder, and actuate the transmitted light amount variable member according to the displacement amount without using electrical means. And a transmitted light amount variable member that is disposed between the light emitting unit and the light receiving unit and that changes the transmitted light amount according to the operation of the actuating unit, the detection unit being at least three or more locations on the outer peripheral portion of the piston. It is equipped with a detector that detects the amount of displacement of the seal oil at the position, and a light emitting unit and a measuring unit that are provided outside the detecting unit, and a light emitting unit and a light emitting unit inside the detecting unit and a light receiving unit and a measuring unit inside the detecting unit. An apparatus for measuring the inclination of a piston for anhydrous gas holders, which is connected to each other by an optical fiber cable.