JPH0451279Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention is designed to maintain airtightness between a holder side plate and a piston that moves up and down within the same side plate, and is designed to maintain a constant pressure of gas such as blast furnace gas. This relates to an apparatus for detecting the amount of wear of a sealing material in a gas holder stored in a gas holder.

(Prior art) Fig. 2 shows a liquid seal type gas holder, in which 1 is a holder side plate, 2 is a piston that moves up and down within the same side plate 1, and maintains airtightness between the outer periphery of the piston 2 and the side plate 1. A sealing portion 3 is provided.

FIG. 3 shows the sealing part 3, in which a holding metal fitting 6 holding upper and lower sealing materials 4 made of rubber or the like and wooden sealing material spacers 5 that support each of the sealing materials 4 at predetermined intervals is attached via a lever 7. an ammunition (not shown) attached to the lever 7;
The sealing material 4 is pressed against the side plate 1 by the urging force of and the static pressure of the sealing liquid 8 stored in the liquid groove, and the gas stored in the lower part of the piston 2 is sealed.

The sealing liquid 8 flows down from the gap between the side plate 1 and the sealing material 4, is collected in a groove provided at the bottom of the holder, and is circulated to the liquid groove at the top of the piston 2 by a pump that operates intermittently. .

In the figure, reference numeral 9 denotes a flexible film such as a canvas interposed between the holding fitting 6 and the piston 2.

(Problem to be solved by the invention) When the gas holder is used for a long period of time, the sealing material wears out, and when the sealing material is extremely worn, the sealing function is impaired and the side plate of the holder is damaged. No consideration was given to detecting the state of wear of the materials.

(Means for Solving the Problem) The present invention relates to a sealing material wear detection device for a gas holder proposed to solve the above-mentioned problem. It slides along the inner peripheral surface of the side plate,
A sealing device includes a pair of upper and lower sealing materials that maintain airtightness between the same side plate and the piston, and a sealing material spacer that is sandwiched between the sealing materials and forms a chamber in which a sealing liquid is stored on the outer periphery. In the gas holder, in the space within the sealing material spacer,
The above problem is solved by installing a flat capacitor whose capacitance changes with the inflow of the sealing liquid and connecting the flat capacitor to an explosion-proof capacitance detection amplifier.

(Function) As described above, in the present invention, a flat capacitor connected to an explosion-proof capacitance detection amplifier is embedded in the sealing material spacer that holds the sealing material in the gas holder. As the seal rubber wears out, seal oil flows between the flat capacitors, and the flat capacitors come into contact with each other through the seal oil, increasing the capacitance of the flat capacitors.

This increase in capacitance of the flat plate capacitor is detected by an explosion-proof capacitance detection amplifier and an alarm is issued.

(Effect of the invention) As described above, according to the invention, the amount of wear of the sealing material can be detected by embedding a flat capacitor connected to an explosion-proof capacitance detection amplifier in the sealing material spacer. Therefore, abnormal wear of the sealing material can be prevented, accidents such as gas leakage can be prevented, and the timing for replacing the sealing material can be predicted.

(Example) The present invention will be described below with reference to the illustrated embodiments.

FIG. 1 shows a seal portion 3 disposed on the outer peripheral surface of a piston that moves up and down within a side plate 1 of a gas holder.
5 is a wooden sealing material spacer that is held between each of the sealing materials 4, 4, 6 is a holding metal fitting that holds the spacer 5 and the sealing material 4, and a lever ( (not shown) to a support section disposed on the outer circumference of the piston.

A space 10 is provided by hollowing out the inside of the spacer 5, and two flat capacitors 11 are installed in the space 10, and each of the flat capacitors 11 is connected to an explosion-proof capacitance detection amplifier 12.

Since the illustrated embodiment is configured as described above, when the wear of the seal material 4 and the seal material spacer 5 progresses to the space 10 in the spacer 5, the seal oil 8 flows into the space 10 and The two flat plate capacitors 11, 11 come into contact with each other via the seal oil 8, and the capacitance of the flat plate capacitor 11 increases.

This change is detected by the explosion-proof capacitance detection amplifier 12, and the alarm 13 issues an alarm.

In this way, according to the embodiment, wear of the sealing material 4 can be detected with a simple configuration.
It is possible to prevent abnormal wear of the sealing material 4, gas leakage accidents can be prevented, and it is also possible to predict when the sealing material 4 will be replaced.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of a sealing material wear amount detection device in a gas holder according to the present invention;
FIG. 2 is a vertical cross-sectional view showing an outline of a gas holder equipped with the device of the present invention, and FIG. 3 is a vertical cross-sectional view of a seal portion of a conventional gas holder. 1... Gas holder side plate, 2... Piston, 4...
...Sealing material, 5...Sealing material spacer, 11...
Flat plate capacitor, 12...Explosion-proof capacitance detection amplifier.

Claims (1)

[Scope of utility model registration request] A pair of upper and lower sealing materials that slide along the inner peripheral surface of the side plate and maintain airtightness between the side plate and the piston are placed on the outer periphery of the piston that moves up and down within the side plate of the gas holder, and a pair of sealing materials are sandwiched between the sealing materials. A gas holder having a sealing device including a sealing material spacer formed on an outer periphery to form a chamber for storing a sealing liquid, the capacitance of which changes as the sealing liquid flows into the space within the sealing material spacer. A device for detecting the wear amount of sealing material in a gas holder, characterized in that the plate capacitor is connected to an explosion-proof capacitance detection amplifier.