JPS58820Y2 - Liquid level monitoring device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquid level monitoring device used by being attached to a water level gauge of a boiler or the like.

Circulating boilers are required by law to be equipped with a water level gauge to monitor the water level in the drum, and boiler operators must pay attention to abnormalities in the boiler water level by visually checking the boiler water level gauge from time to time. .

High-pressure circulating water from the boiler is introduced into the water level gauge, so the glass in the see-through window of the water level gauge is made of a material that can withstand high pressure. often corrodes and loses its specified pressure resistance.

For this reason, conventionally, while the boiler operator was monitoring the boiler water level through the see-through window of the water level gauge, the glass of the see-through window of the water level gauge would suddenly break, causing high-pressure steam to spew out along with high-pressure water, resulting in injury to the boiler operator. In some cases, accidents resulting in death or death may occur, and there has been a desire to improve the safety of boiler monitoring operations.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide a liquid level monitoring device that can safely monitor the liquid level in a high-pressure liquid tank such as a boiler. The purpose of the present invention is to provide a liquid level monitoring device suitable for use by being attached to a water level gauge.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The accompanying drawing is a cross-sectional view taken along a horizontal plane of the liquid level monitoring device according to the present invention, and in the drawing, numeral 1 indicates a part of a known water level gauge installed in a boiler or the like.

The water level gauge 1 has a heat-resistant and pressure-resistant glass transparent window 1A on the front thereof, and the water level in the horizontal plane 1 can be seen from the right side of the figure through the transparent window 1A.

A box-shaped housing 2 having a pair of parallel side walls 3A and 2B extending perpendicularly to the surface of the transparent window 1A is installed in front of the transparent window 1A. A reflecting mirror 7 is provided which is rotatable around an axis X that faces and is perpendicular to the plane of the paper.

Openings 2a and 2b are provided in parallel side walls 2A and 2B of the housing 2 at opposing positions, respectively, and a transparent body 3 made of a transparent material such as glass is provided on the outer surface of the side wall 2A of the housing 2 so as to cover one of the openings 2a. installed.

A sealing material 4 made of a substance such as asbestos is filled between the transparent body 3 and the side wall 2A of the housing 2 to prevent steam, etc. from leaking from the space inside the housing 2 through the back surface of the transparent body 3. It has become.

A baffle plate 5 is provided facing the opening 2b of the other side wall 2B with a predetermined gap g from the outer surface of the side wall 2B, and this baffle plate 5 is fixed to the side wall 2 of the housing 2 by suitable fixing means.
It is fixed at B.

The gap g between the baffle plate 5 and the housing side wall 2B communicates with the atmospheric space outside the housing 2 at the outer peripheral edge of the baffle plate 5, and as will be explained later, even if high-pressure water or steam in the boiler Even if the leakage into the housing 2 occurs, it can be dissipated through the gap g to the atmospheric space outside the housing 2.

On the outer surface of the side wall 2A in the vicinity of the transparent body 3, the side wall 2A
A supervisor protection plate 6 is attached that extends in a direction protruding from the surface of the supervisor M, and the supervisor M visually observes the reflecting mirror 7 through the transparent body 3 at a position P on the back side of the supervisor protection plate 6. ing.

A light-shielding plate 8 is provided on the outer surface of the parallel side wall 2A at a position opposite to the observer protection plate 6, and the base end of this light-shielding plate 8 is attached to a hinge 9 so that it can rotate around an axis perpendicular to the plane of the drawing. It is pivotally attached to the side wall 2A of the housing.

The light shielding plate 8 is movable toward and away from the outer surface of the transparent body 3, and is adapted to adjust the amount of external light irradiated onto the outer surface of the transparent body 3.

According to the device of the present invention having the above structure, the see-through window 1A of the water level gauge 1
Even if the boiler is broken and high-pressure boiler circulating water and steam are spouted out as shown by arrow F in the figure, these high-pressure water and steam are
It flows out through the opening 2b provided in one side wall 2b of the housing, further collides with the baffle plate 5 and reduces its speed, and then diffuses into the external atmosphere through the gap g between the baffle plate 5 and the housing side wall. Therefore, there is no risk of harm to the observer M, and there is an advantage that the water level in the water level gauge 1 can be accurately monitored via the reflector 7.

Furthermore, even if the spouted steam or high-pressure water blows away the transparent body 3 and spouts out from the opening 2a, a supervisor protection plate 6 is provided near the supervisor M, so that the steam or high-temperature water will not hit the supervisor. There is no direct hit, and the provision of the light shielding plate 8 reduces the irradiation of external light onto the outer surface of the transparent body 3, so even indirect monitoring via the reflector 7 can detect the water surface. The water level within the total 1 can be read accurately.

[Brief explanation of the drawing]

The accompanying drawings are cross-sectional views taken along a horizontal plane, showing the liquid level monitoring device according to the present invention being installed in a known water level gauge and in use. 1...Water level gauge, 1A...See-through window, 2.
...Housing, 2A, 2B...Parallel side wall, 2a, 2b...Opening, 3...Transparent body, 5...Baffle plate, 6... Supervisor protection plate, 7... Reflector, 8... Light blocking plate.

Claims (1)

[Scope of utility model registration request] A liquid level monitoring device used by being attached to a water level gauge of a boiler, etc., which has a pair of parallel side walls extending in a direction perpendicular to the surface of a see-through window of the water level gauge, and is detachable from the front surface of the water level gauge. a box-shaped housing that can be attached, an opening provided in each of the front closed parallel side walls, and a baffle plate provided facing one of the openings with a predetermined gap from the outer surface of one of the parallel side walls. a transparent body attached to the other side of the parallel side wall so as to close the other side of the opening; and a transparent body provided in the housing at a position opposite to the see-through window of the water level gauge and whose axis is parallel to the plane of the see-through window. a reflecting mirror rotatably supported around the housing and capable of reflecting an image from the viewing window to the outside of the housing through the transparent body.