JP2009236171A - Grease quantity monitoring device of grease tank of dry seal gas holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grease quantity monitoring device of a dry type gas holder free from problems regarding safety such as gas leakage to which an inspector does not need to frequently enter for inspection of a grease tank 3. <P>SOLUTION: In the dry type gas holder 1 having a lifting piston 2 for moving up and down in a gas holder main body 1 according to a storing gas quantity, the grease tank 3 for feeding grease to a sealing part between the gas holder main body 1 and the lifting piston 2 is mounted on the lifting piston 2. The grease quantity monitoring device of the dry type gas holder is capable of monitoring the grease quantity of the grease tank 3 at a place out of the tank. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an oil / fat tank for a dry gas holder used in a steelworks or the like.

  In general, in steelworks, combustible gas such as blast furnace gas is stored in a gas storage facility such as a dry gas holder in order to effectively use gas generated in a blast furnace or coke oven as fuel. In this dry gas holder, a dome-shaped ceiling called a lifting piston 2 is accommodated in a gas holder main body 1 formed in a columnar shape as shown in FIG.

  The elevating piston 2 is adapted to move up and down according to the amount of stored gas, and the outer peripheral portion (A portion in FIG. 5) of the elevating piston 2 is a guide roller and a sealing device as shown in the partially enlarged view of FIG. Is pressed against the side wall 4 of the gas holder 1. As shown in the enlarged view of FIG. 7, the seal portion (B portion in FIG. 6) prevents leakage of internal gas by the seal rubber pressed against the side wall 4 of the gas holder 1 by the pressing lever.

  Oil and grease are replenished between the seal rubbers so that the seal rubber part can easily slide on the side wall 4 surface of the gas holder 1. The oil / fat is supplied from the oil / fat tank 3 installed at the apex of the lifting / lowering piston 2 shown in FIG. 2 to each seal rubber portion by piping installed radially toward the outer edge of the lifting / lowering piston 2.

  The seal rubber portion always slides on the side wall 4 of the gas holder 1, and if the oil supplied from the oil tank 3 runs out, the wear becomes severe and causes gas leakage. Therefore, since it is necessary to always replenish the oil / fat tank 3 with the oil / fat, it is necessary for an inspector to enter the lift piston 2 and inspect the oil / fat tank 3. If the inspector enters the elevating piston 2 every time, there is a safety problem such as gas leakage.

In place of the inspection work by such a person, in Patent Document 1, the sealing method of the gas seal is different from that of the present application. However, a liquid tank is provided along the circumferential direction of the piston 2 to seal, and the display type liquid level A method is disclosed in which a change in the level of the seal oil is converted into an electric signal and grasped using a meter.
Japanese Patent Publication No. 6-19275

  Gas seals using the seal rubber method require frequent inspection by the inspector to check the oil / fat tank 3, which can lead to safety problems such as gas leaks and time-consuming data acquisition. The liquid seal method described in Patent Document 1 Then, since it was necessary to make the transmitter etc. explosion-proof for gas leakage countermeasures, a great deal of cost was required for the countermeasures.

  Thus, as a result of intensive studies, the inventors have been able to monitor the amount of oil in the oil tank 3 on the piston of the dry gas holder 1 from the outside of the tank safely and at low cost, which does not require expensive explosion-proof specifications. An oil and fat amount monitoring device that can be used is provided.

  1st invention is a dry-type gas holder which has a raising / lowering piston which raises / lowers the inside of a gas holder main body according to the amount of stored gas, and supplies fats and oils to the sealing part between the said gas holder main body and the said raising / lowering piston on the said raising / lowering piston. An oil / fat amount monitoring device for a dry gas holder, wherein an oil / fat tank is installed and the amount of oil / fat in the oil / fat tank can be monitored at a location outside the tank.

  According to a second aspect of the present invention, the monitoring device displays a compressed air jet pipe, a compressed air supply pipe, a pressure sensor that detects a pressure change of the compressed air, a calculation device that converts the detected pressure into a fat and oil capacity, and a calculation result. It is an oil-fat amount monitoring device for a dry gas holder according to the first invention, characterized in that it comprises a display device.

  According to the present invention, an oil / fat amount monitoring device that can monitor the amount of oil / fat in the oil / fat tank 3 on the lifting / lowering piston 2 of the dry gas holder 1 from the outside of the tank safely and at low cost without requiring an expensive explosion-proof specification or the like. Is obtained.

  An embodiment of the present invention will be described with reference to the drawings. In this embodiment, the target dry gas holder 1 is an example of the dry gas holder 1 having a cylindrical outer shape that is used in many steelworks as shown in FIG. State. Of course, the external shape of the dry gas holder 1 in which the oil and fat amount monitoring device according to the present invention is installed is not limited to a cylindrical shape.

  Inside the dry gas holder 1, an elevating piston 2 that moves up and down according to the amount of stored gas is pressed against the side wall 4 of the dry gas holder 1 via a guide roller and a sealing device.

  As shown in the partially enlarged view of FIG. 6, the outer peripheral portion of the elevating piston 2 (A portion in FIG. 5) is pressed against the side wall 4 of the gas holder 1 via a guide roller and a seal device, and the seal portion ( As shown in the enlarged view of FIG. 7, (B part of FIG. 6) prevents leakage of internal gas by the seal rubber pressed against the side wall 4 of the gas holder 1 by the pressing lever.

  The seal rubber portion is replenished with oil and fat between the seal rubbers so that it can easily slide on the side wall 4 of the gas holder 1, and this oil and fat is supplied from an oil and fat tank 3 installed at the apex of the elevating piston 2 shown in FIG. Each of the seal rubber portions is supplied to the outer peripheral portion of the elevating piston 2 by piping arranged radially.

  FIG. 2 is a diagram illustrating a schematic configuration of a monitoring device that monitors the amount of oil and fat of the dry gas holder 1 according to an embodiment of the present invention. As shown in FIG. 2, the oil / fat amount monitoring device for a dry gas holder according to an embodiment of the present invention includes an oil / fat tank 3 storing oil / fat supplied to the seal portion of the lifting / lowering piston 2 and the oil / fat capacity in the oil / fat tank 3. A purge type fat / oil capacity meter 10 to be detected, an arithmetic unit 20 that calculates the pressure change of the purge gas detected by the purge type oil capacity meter 10 to the oil / fat capacity stored in the oil / fat tank, and a display device 30 that displays the calculation result. Has been.

  As shown in FIG. 1, the purge-type oil / fat capacity meter 10 includes a bubble ejection pipe 11 provided in an oil / fat tank 3 that stores oil / fat supplied to the seal portion of the lifting / lowering piston 2 of the dry gas holder 1, and the bubble ejection pipe 11. A purge gas supply pipe 12 for supplying compressed air and inert gas, and a pressure sensor 13 for electrically detecting a pressure change of the purge gas supplied from the purge gas supply pipe 12 to the bubble jet pipe 11. The sensor 13 is provided outside the dry gas holder 1 so that an inspector does not have to enter the lifting piston 2. In addition, since the pressure sensor 13 is provided outside the dry gas holder 1, there is no need to install an electric device inside the dry gas holder 1, so there is no risk of a gas explosion due to an electrical short, so an expensive explosion-proof sensor specification There is no need to do.

  In the arithmetic unit 20, as shown in FIG. 4, the pressure change of the purge gas detected by the pressure sensor 13 is converted into the oil / fat capacity by the pressure-oil / fat capacity conversion circuit.

  And this oil-fat capacity level is displayed on the display apparatus 30 as a time change of an oil-fat level, as shown in FIG. In FIG. 3, the oil and fat are gradually supplied to the seal portion at point A when the oil and fat are gradually filled in the tank, and the oil and fat capacity level reaches the point B toward the B point and the oil and fat tank 3 is filled with the oil and fat. The At this time, the oil / fat volume level displays the point C, and when the rubber wear of the seal portion increases, the oil / fat consumption becomes severe. Since the arrival time at point D, which is a point, is earlier than the arrival times at points A to B, the rubber of the seal portion is inspected.

  In addition, when calculating the oil / fat volume level from the pressure of the purge gas, the pressure sensor 13 was installed outside the main body of the dry gas holder 1 and there was a concern about pressure loss. However, as shown in FIG. Is obtained.

  As described above, according to the present invention, it is possible to detect the oil / fat capacity of the oil / fat tank 3 without installing an electric device in the dry gas holder 1, and it is not necessary to use an explosion-proof detector. The oil and fat capacity of the tank can be monitored.

It is a figure which shows the structure of a purge type oil-fat capacity meter. It is a figure which shows the whole structure of an oil-fat amount monitoring apparatus. It is a figure which shows the pressure change displayed on a display apparatus. It is a figure which shows the relationship between the pressure change of purge gas, and oil-fat capacity | capacitance. It is a figure which shows the whole view of a dry-type gas holder. It is the elements on larger scale of the A section which is the outer periphery of a raising / lowering piston. FIG. 4 is a partially enlarged view of a seal part B.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dry-type gas holder 2 Lifting piston 3 Oil tank 4 Gas holder wall 10 Purge type oil volume meter 11 Bubble jet pipe 12 Purge gas supply pipe 13 Pressure sensor 20 Arithmetic device 30 Display device

Claims (2)

  In the dry gas holder having an elevating piston that moves up and down in the gas holder body according to the amount of stored gas, on the elevating piston, an oil and fat tank that supplies oil and fat to a seal portion between the gas holder main body and the elevating piston is installed, An oil / fat amount monitoring device for a dry gas holder, wherein the oil / fat amount of the oil / fat tank can be monitored at a location outside the tank.   The monitoring device comprises a compressed air ejection pipe, a compressed air supply pipe, a pressure sensor for detecting a pressure change of the compressed air, an arithmetic device for converting the detected pressure into a fat and oil capacity, and a display device for displaying a calculation result. The apparatus for monitoring the amount of oil in a dry gas holder according to claim 1.

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