JP2014020518A - Gas holder piston rotation detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas holder piston rotation detector that can detect the rotation of a piston at an early stage to prevent the explosion of a gas holder and to minimize a damage scale, in a piston type gas holder.SOLUTION: A plurality of laser transmitting/receiving machines 5 (a reference laser transmitting/receiving machine 5A and other laser transmitting/receiving machines 5B) are installed to a ceiling 4 of a gas holder, and a reflection plate 6 is installed on a piston 2. By detecting the rotation movement of the reflection plate 6 with the plurality of laser transmitting/receiving machines 5, the rotation of the piston 2 is detected.

Description

  The present invention relates to a piston-type gas holder for storing a by-product gas generated in a blast furnace, a coke oven, or the like of an ironworks, and more particularly, to a piston rotation detection device that measures the rotation of a lifting piston.

  A piston-type gas holder is used when storing by-product gas generated in a blast furnace or a coke oven at an ironworks.

  The piston-type gas holder has a structure in which a substantially disc-shaped elevating piston is accommodated inside the gas holder body, and this elevating piston moves vertically in the gas holder body according to the amount of stored gas. Yes. An oil or grease seal mechanism is provided at the peripheral edge of the lift piston, and the oil or grease seal mechanism seals between the peripheral edge of the lift piston and the inner wall of the gas holder main body, and at the time of lift and the like. It is designed to reduce sliding friction. Furthermore, several piston rotation prevention devices and the like are installed for suppressing rotation of the piston in the circumferential direction when the piston is raised and lowered.

  However, the gas holder vibrates due to earthquakes, strong winds, etc., and a gap is generated between the gas holder body and the piston.If this gap exceeds the allowable range of the rotation prevention device, the rotation prevention device comes off and the piston rotates. End up. The piston may tilt or oil may decrease due to the rotation of the piston. In response to this, a method has been proposed to detect abnormalities in the gas holder by installing a piston inclinometer or oil level gauge. (For example, Patent Documents 1 to 3).

JP 2006-017152 A JP 2007-255484 A JP 2010-144871 A

  However, even when the piston rotates due to an earthquake, strong wind, or the like, the piston tilt or oil level abnormality may not occur.

  If the piston continues to move up and down while the piston is rotating, there is a possibility of heat generation due to friction / sliding between the seal sliding part and the holder body side, and sparks due to metal contact. There are serious safety issues such as the danger of explosion. Therefore, the piston rotation must be detected early and the operation of the gas holder must be stopped.

  In addition, when operation is continued with the piston rotated, the piston guide roller travels on the gas holder side plate with no strength instead of the gas holder base pillar of the normal travel route, so that a huge repair cost after the gas holder stops Cost. Or it cannot be used continuously by repair.

  The present invention has been made in view of the above circumstances, and in the piston-type gas holder, the rotation of the piston is detected early in order to prevent the explosion of the gas holder and minimize the damage scale. An object of the present invention is to provide a gas holder piston rotation detection device that can perform the above-described operation.

  In order to solve the above problems, the present invention has the following features.

  [1] A gas holder piston rotation detecting device for detecting the rotation of a piston in a piston type gas holder, which is a reference mark installed on the piston, and a rotational movement detecting means installed on the ceiling of the gas holder A gas holder piston rotation detecting device comprising: detecting rotation of the piston by detecting rotational movement of the sign using the rotational movement detecting means.

  [2] A reference reflector installed on the piston and a plurality of laser transmitters / receivers installed on the circumference of the ceiling of the gas holder, the plurality of laser transmitters / receivers The gas holder piston rotation detection device according to the above [1], wherein the rotation of the piston is detected by detecting the rotational movement of the reflection plate by using the above.

  [3] A reference device installed on the piston and image photographing means installed on the ceiling of the gas holder are provided, and the reference photographing device is photographed by the image photographing means to detect the rotational movement of the reference device. Thus, the gas holder piston rotation detecting device according to [1], wherein the rotation of the piston is detected.

  [4] The gas holder piston rotation detection device according to any one of [1] to [3], further including an alarm device that issues an alarm when the rotation of the piston is detected.

  In the present invention, the rotation of the piston in the piston type gas holder can be detected at an early stage. As a result, it is possible to minimize the holder operation with the piston rotating, and to prevent an explosion accident due to heat generation or sparks due to metal contact between the seal mechanism and the holder body. Furthermore, by stopping the use of the gas holder immediately after detection of the Pilton rotation, damage to the holder body and the seal mechanism can be minimized and the repair cost can be reduced.

  Moreover, in the present invention, the piston rotation can be detected without providing a mechanical device or electrical equipment that slides inside the gas holder, which is very preferable for disaster prevention.

It is an elevation view showing one embodiment of the present invention. It is a top view which shows one Embodiment of this invention.

  The gas holder piston rotation detection device in the present invention is a gas holder piston rotation detection device for detecting the rotation of a piston in a piston type gas holder, and its basic configuration is a reference installed on the piston. The sign and the ceiling of the gas holder are provided with rotational movement detecting means, and the rotation of the piston is detected by detecting the rotational movement of the sign using the rotational movement detecting means.

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an elevation view showing an embodiment of the present invention. 2A is a plan view taken along the line AA in FIG. 1, and FIG. 2B is a plan view taken along the line BB in FIG.

  As shown in FIG. 1, inside a gas holder main body 1 for containing gas, a piston 2 serving as a lid is provided along the inner surface of the side wall of the gas holder main body 1 through a seal mechanism 3 provided at the peripheral edge thereof. Can be moved up and down. A gas holder ceiling 4 is provided at the top of the gas holder body 1. In the gas holder, the capacity of the gas to be stored is adjusted by moving the piston 2 up and down. The seal mechanism 3 prevents gas leakage by sealing between the periphery of the piston 2 and the inner surface of the side wall of the gas holder body 1. The gas holder ceiling 4 prevents rainwater and the like from entering.

  In this embodiment, as shown in FIGS. 1 and 2 (a), a plurality of laser transmitters / receivers 5 (reference laser transmitter / receiver 5A, other laser transmitters / receivers) are provided on the gas holder ceiling 4. In addition to installing the receiver 5B), as shown in FIG. 1 and FIG. 2B, the reflector 6 is installed on the piston 2, and the reflector 6 is formed by using these plural laser transmitters / receivers 5. The rotation of the piston 2 is detected by detecting the rotational movement.

  That is, during normal operation, since the piston 2 is not rotated by a piston rotation prevention device (not shown), the reference laser transmission / reception 5A performs laser transmission / reception. When the piston rotates, the reflector 6 rotates and moves in the circumferential direction of the piston 2, so that the laser transmission / reception 5B other than the reference laser transmission / reception 5A operates (laser transmission / reception). By installing the laser transmitter / receiver 5 at a constant interval (for example, at an interval of 1 m), the rotation amount of the piston can also be detected from the position of the activated laser transmitter / receiver 5. In addition, when the laser transmitter / receiver 5B other than the reference laser transmitter / receiver 5A is activated, it is displayed on the motor 8 and an alarm is issued by the alarm device 9.

  In this embodiment, as shown in FIGS. 1 and 2A, an image capturing device 7 is installed at the center of the gas holder ceiling 4, and the image capturing device 7 is shown as a broken line portion in FIG. The rotational amount of the piston 2 is detected by photographing the reference device (reflecting plate) 6 and detecting the rotational movement of the reference device 6.

  As the image photographing device 7, for example, a general-purpose device composed of a large number of photographing elements such as a CCD camera and a CMOS camera used for a commercially available video camera or digital camera can be used as it is. The image data of the reference device 6 photographed by the image photographing device 7 can be output to the monitor 8 at any time via a wired cable or a wireless line. When the rotation of the piston 2 is detected, an alarm is issued by the alarm device 9.

  Incidentally, in this embodiment, a series of detecting the rotation of the piston 2 using a plurality of laser transmitters / receivers 5 and the reflecting plate 6, and the rotation of the piston 2 using the image capturing device 7 and the reference device 6 are used. Although two detection sequences to be detected are provided, any one of the detection sequences may be provided. However, if two detection sequences are provided as described above, even when one of the detection sequences fails, it is possible to appropriately cope with it.

  Thus, in this embodiment, the rotation of the piston 2 in the piston type gas holder can be detected at an early stage. As a result, the holder operation in a state where the piston 2 is rotated can be minimized, and an explosion accident due to heat generation or sparks caused by metal contact between the seal mechanism 3 and the holder body 1 can be prevented. Furthermore, by stopping the use of the gas holder immediately after detecting the rotation of the pilton 2, damage to the holder main body 1 and the seal mechanism 3 can be minimized and the repair cost can be reduced.

  In addition, in this embodiment, since the rotation of the piston 1 can be detected without providing a mechanical device or electrical equipment that slides inside the gas holder body 1, it is very preferable for disaster prevention.

  Examples of the present invention are described below.

  Based on one embodiment of the present invention described above, rotation of the piston 2 in the piston-type gas holder was detected.

  During normal operation, the rotation of the piston 2 was not detected because the piston 2 did not rotate by a piston rotation prevention device (not shown).

  However, when the 3.11 Great East Japan Earthquake occurred, the laser transmitter / receiver 5B other than the reference laser transmitter / receiver 5A was activated, and among the laser transmitters / receivers 5 installed at intervals of 1 m, the reference laser transmitter / receiver 5A Since the 1st and 2nd laser transmitter / receiver 5B was operated, the gas holder operation was stopped and the inspection was performed. As a result, it was found that the piston 2 was rotated about 2.3 m in the clockwise direction.

  This confirmed the effectiveness of the present invention.

1 Gas holder body 2 Piston 3 Sealing mechanism 4 Gas holder ceiling (top)
5 Laser transmitter / receiver 5A Reference laser transmitter / receiver 5B Laser transmitter / receiver other than reference laser transmitter / receiver 6 Reflector (reference device)
7 Image capture device 8 Monitor 9 Alarm device

Claims (4)

  A gas holder piston rotation detection device for detecting the rotation of a piston in a piston type gas holder, comprising a reference mark installed on the piston and a rotational movement detection means installed on the ceiling of the gas holder. A gas holder piston rotation detection device for detecting the rotation of the piston by detecting the rotation movement of the sign using the rotation movement detecting means.   A reference reflector installed on the piston and a plurality of laser transmitters / receivers installed on the circumference of the ceiling of the gas holder, and using the plurality of laser transmitters / receivers The gas holder piston rotation detection device according to claim 1, wherein the rotation of the piston is detected by detecting the rotational movement of the reflecting plate.   By providing a reference device installed on the piston and an image photographing means installed on the ceiling of the gas holder, by photographing the reference device with the image photographing means and detecting the rotational movement of the reference body, The gas holder piston rotation detection device according to claim 1, wherein the rotation of the piston is detected.   The gas holder piston rotation detection device according to any one of claims 1 to 3, further comprising an alarm device that issues an alarm when rotation of the piston is detected.

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