JP4774508B2 - Explosion-proof monitoring device and explosion-proof container - Google Patents

Description

  The present invention relates to a pressure-proof explosion-proof monitoring device and a pressure-proof explosion-proof container, and more particularly to a pressure-proof explosion-proof monitoring device arranged in a hazardous area and an abnormality monitoring system using the pressure-proof explosion-proof monitoring device.

  Remotely operable industrial cameras installed on-site are widely used in abnormality monitoring systems that constantly monitor whether a plant is operating normally. An apparatus in which a microphone is attached to the monitoring apparatus main body in addition to the camera is also known (see Patent Document 1). Wireless transmission is widely used for transmission and reception of signals between the monitoring apparatus and the main station in such an abnormality monitoring system.

  In order to install such an abnormality monitoring system in a dangerous place under the Fire Service Law, it is necessary to make the equipment installed in the dangerous place a pressure-proof explosion-proof structure in order to prevent an explosion accident. The dangerous place is a place where there is a possibility that flammable gas or flammable liquid vapor may be present, for example, an explosion-proof area of an oil plant. The pressure-proof explosion-proof structure is a structure in which when a flammable gas explosion occurs inside a fully-closed container, the container can withstand the pressure and does not ignite external explosive gas.

In order to be certified as an explosion-proof device that can be installed in a hazardous area, it is necessary to pass a predetermined certification test.
JP-A-9-196825

  However, if the explosion-proof container is changed, a re-certification test is required. FIG. 4 is a side view showing a case where an explosion-proof microphone, an explosion-proof camera, or the like is directly attached to the monitoring device. As shown in FIG. 4, when the explosion-proof microphone 116, the explosion-proof camera 118, the explosion-proof antenna 120, and the like are attached to the pressure-proof explosion-proof container 126 of the pressure-proof and explosion-proof monitoring device 114, depending on the positional relationship between the pressure-proof explosion-proof monitoring device 114 and the monitoring target. In this case, the explosion-proof microphone 116 and the explosion-proof antenna 120 are located within the field of view of the explosion-proof camera 118, and a blind spot in monitoring occurs. In particular, when monitoring is performed while moving the monitoring device 114, such a problem is likely to occur.

  When the explosion-proof microphone 116 and the explosion-proof antenna 120 are positioned between the explosion-proof camera 118 and the monitoring target, the explosion-proof microphone 116 and the explosion-proof antenna 120 are not positioned between the explosion-proof camera 118 and the monitoring target. The mounting positions of the microphone 116, the explosion-proof camera 118, the explosion-proof antenna 120, etc. must be changed as appropriate. When changing the mounting positions of the explosion-proof microphone 116, the explosion-proof camera 118, the explosion-proof antenna 120, etc., mounting holes (not shown) for mounting the explosion-proof microphone 116, the explosion-proof camera 118, the explosion-proof antenna 120, etc. to the flameproof container 126 are not shown. ) Position is forced to change. If the position of the mounting hole is changed in this way, the explosion-proof performance is affected.

  An object of the present invention is to provide an explosion-proof monitoring device capable of easily changing the mounting position of an explosion-proof microphone, explosion-proof camera, explosion-proof antenna, etc., without any change that requires re-acquisition of the certification test, and its explosion-proof protection It is to provide an abnormality monitoring system using a type monitoring device.

An object of the present invention is to provide a pressure and explosion proof container having a pressure and explosion proof structure in which at least an electric circuit is accommodated, and having a mounting portion formed on at least one of an upper surface side and a lower surface side, and the pressure and explosion proof container a support mounted to the mounting portion of, is supported on said support, a camera and an antenna, or is accomplished by pressure-resistant explosion-proof monitoring apparatus characterized by having a microphone and an antenna.

Further, the above object is achieved by a pressure-resistant explosion-proof container flameproof least an electrical circuit is housed, the camera and the antenna, or, a mounting portion for mounting a support for supporting the microphone and the antenna, the upper surface or This is achieved by a flameproof container that is formed on at least one of the lower surface side.

Further, the above object is achieved by a pressure-resistant explosion-proof container flameproof least the electrical circuit is accommodated, and Explosion-proof container mounting portion is formed on at least one of upper and lower side, the flameproof a support mounted to the mounting portion of the mold container, supported on said support, a camera and an antenna, or a malfunction monitoring system using a plurality of pressure-resistant explosion-proof monitoring device having a microphone and an antenna, The one explosion-proof type monitoring device for monitoring a monitoring target has the support attached to the upper surface side of the explosion-proof type container, and the other explosion-proof type monitoring device for monitoring the monitoring target from above. This is achieved by an abnormality monitoring system in which the support is attached to the lower surface side of the explosion-proof container.

  According to the present invention, a microphone, a camera, an antenna, and the like are supported by a support provided separately from the explosion-proof container, and the microphone, camera, antenna, and the like are attached to the explosion-proof container via the support. Since it is fixed, when changing the position of the microphone, camera, antenna, etc., it is only necessary to change the mounting holes (not shown) for attaching the microphone, camera, antenna, etc. to the plate-like support, There is no need to change the explosion-proof container. For this reason, according to the present invention, it is possible to easily change the mounting positions of the microphone, the camera, the antenna, and the like without making a change that requires re-acquisition of the certification test.

  Further, according to the present invention, the attachment portion for attaching the plate-like support to the explosion-proof container is formed not only on the upper surface side but also on the lower surface side of the explosion-proof container. For this reason, it is possible to attach a support body to the lower side of the explosion-proof explosion-proof monitoring device main body without inverting the top and bottom of the explosion-proof explosion-proof monitoring device body. Therefore, even when a microphone, a camera, an antenna, or the like is provided on the lower side of the explosion-proof type monitoring device main body via the support body, the pressure-proof and explosion-proof type monitoring device main body can be easily maintained.

[One Embodiment]
An explosion-proof monitoring device and an abnormality monitoring system using the explosion-proof monitoring device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing the configuration of the abnormality monitoring system according to the present embodiment. FIG. 2 is a side view showing the explosion-proof explosion-proof monitoring device (No. 1) according to the present embodiment. FIG.2 (b) is sectional drawing which shows a part of explosion-proof type | mold monitoring apparatus shown to Fig.2 (a). FIG. 3 is a side view showing the explosion-proof explosion-proof monitoring device (No. 2) according to the present embodiment.

  The abnormality monitoring system according to the present embodiment monitors abnormalities by monitoring leakage of equipment, piping, etc. in a hazardous area such as an oil plant or factory, or a malfunction of a rotating machine.

  In an explosion-proof area of an oil plant that is a monitoring target, for example, as shown in FIG. 1, pressure-proof explosion-proof monitoring devices 12a and 12b that monitor the monitoring target 10 in the plant and an explosion-proof radio 8 are installed. . The explosion-proof wireless device 8 is a wireless device serving as a wireless head office, and is connected to a processing device 6 installed in a non-explosion-proof area such as an instrument room.

  The explosion-proof explosion-proof monitoring devices 12a and 12b include a flame-proof explosion-proof monitoring device body 14, an explosion-proof microphone 16 for monitoring the operation sound of the plant, and an explosion-proof camera (explosion-proof monitoring camera) 18 for photographing the inside of the plant. And an explosion-proof antenna 20 for transmitting acoustic data from the explosion-proof microphone 16 and image data from the explosion-proof camera 18 and receiving control signals for the explosion-proof microphone and explosion-proof camera, and an explosion-proof microphone 16, explosion-proof camera 18 and explosion-proof antenna 20. And a plate-like support 22 for supporting.

  In FIG. 1, the explosion-proof monitoring device 12a is a fixed monitoring device fixed at a predetermined location, and the explosion-proof monitoring device 12b is a movable monitoring device. The movement monitoring device 12b can move along a rail 13 provided in an oil plant, a factory, or the like, and monitors the monitoring target 10 from above.

  The explosion-proof explosion-proof monitoring device main body 14 includes an electric circuit 24 (see FIGS. 2 and 3) having a predetermined function and a pressure-proof explosion-proof container 26 having a pressure-proof structure that houses the electric circuit 24. 2 and 3, the direction of the arrow indicates the upper surface side of the explosion-proof explosion-proof monitoring device main body 14.

  The electric circuit 24 generates acoustic data based on the signal input from the explosion-proof microphone 16, generates image data based on the signal input from the explosion-proof camera 18, and sends these data via the explosion-proof antenna 20. And send it to an explosion-proof radio. Further, the electric circuit 24 receives a control signal output from the explosion-proof wireless device 8 via the explosion-proof antenna 20, and performs predetermined processing based on the received control signal.

  The explosion-proof container 26 is a explosion-proof container configured by, for example, aluminum die casting that satisfies the explosion-proof specification. The pressure-proof explosion-proof container 26 is provided with a pressure-proof packing type pull-in portion (not shown) so that it can be connected to a transmission line described later while maintaining explosion-proof performance.

  An attachment part 28 for attaching the plate-like support 22 is formed in the explosion-proof container 26. The mounting portion 28 is formed integrally with the explosion-proof container 26. For example, four attachment portions 28 are formed on the upper surface side and the lower surface side of the explosion-proof container 26. Each mounting portion 28 has a screw hole 29 for screwing.

  A plate-like support 22 is provided on the upper surface side or the lower surface side of the explosion-proof container 26. In the plate-like support 22, a hole (not shown) for passing a screw 30 is formed corresponding to the attachment portion 28 formed in the explosion-proof explosion-proof container 26. The plate-like support 22 is screwed to the explosion-proof container 26 using screws 30. The plate-like support 22 is formed with screw holes (not shown) for screwing the explosion-proof microphone 16, the explosion-proof camera 18, and the explosion-proof antenna 20. The explosion-proof microphone 16, the explosion-proof camera 18, and the explosion-proof antenna 20 are screwed to the support 22 using screws (not shown).

  The electric circuit 24 and the explosion-proof microphone 16 are connected to each other via a cable-shaped transmission line (not shown). The electric circuit 24 and the explosion-proof camera 18 are connected to each other via another cable-shaped transmission line (not shown). Further, the electric circuit 24 and the explosion-proof antenna 20 are connected to each other via another cable-shaped transmission line (not shown). The transmission line is an explosion-proof flexible cable, and can move the explosion-proof microphone 16, the explosion-proof camera 18, and the explosion-proof antenna 20.

  As shown in FIG. 2, in the explosion-proof type monitoring device 12 a fixed at a predetermined place, that is, in the fixed monitoring device, a plate-like support body 22 is attached to the upper surface side of the pressure-proof and explosion-proof type monitoring device main body 14. The explosion-proof microphone 16, the explosion-proof camera 18 and the explosion-proof antenna 20 are attached to the upper surface side of the plate-like support 22. In the fixed monitoring device 12a, the support 22, the explosion-proof microphone 16, the explosion-proof camera 18, and the explosion-proof antenna 20 are provided on the upper surface side of the pressure-proof explosion-proof monitoring device main body 14. The fixed monitoring device 12a is installed on the floor of a plant or the like. This is because the monitoring target 10 is monitored from the side in the state of being performed.

  On the other hand, in the movable explosion-proof monitoring device 12b, that is, the movement monitoring device, a plate-like support body 22 is attached to the lower surface side of the pressure-proof explosion-proof monitoring device body 14, and the lower surface of the plate-like support body 22 is attached. An explosion-proof microphone 16, an explosion-proof camera 18, and an explosion-proof antenna 20 are attached to the side.

  In the movement monitoring device 12b, the explosion-proof microphone 16, the explosion-proof camera 18, and the explosion-proof antenna 20 are provided on the lower surface side of the pressure-proof explosion-proof monitoring device main body 14 for the following reason. That is, since the movement monitoring device 12b is attached to the rail 13 provided above the monitoring target 10, when the explosion-proof camera 18 is provided on the upper side of the pressure-proof explosion-proof monitoring device main body 14, the field of view of the explosion-proof camera 18 is reduced. It is difficult to monitor the monitoring target 10 because it is blocked by the explosion-proof explosion-proof monitoring device main body 14. On the other hand, when the explosion-proof camera 18 is provided on the lower side of the pressure-proof explosion-proof monitoring device main body 14, the field of view of the explosion-proof camera 18 is not easily blocked by the pressure-proof explosion-proof monitoring device main body 14. Therefore, in the mobile monitoring device 12b that monitors the monitoring target 10 from above, an explosion-proof microphone 16, an explosion-proof camera 18, and an explosion-proof antenna 20 are provided on the lower side of the pressure-proof explosion-proof monitoring device main body 14.

  Moreover, in the movement monitoring apparatus 12b, it installs so that the upper surface side of the explosion-proof type monitoring apparatus main body 14 is on the upper side without inverting the top and bottom of the explosion-proof type monitoring apparatus main body 14 for the following reason. Is due to. If the flameproof explosion-proof monitoring device main body 14 is installed upside down so that the upper surface side is on the lower side, it is extremely difficult to perform maintenance on the electrical circuit 24 housed inside the flameproof explosion-proof container 26. Become. On the other hand, when the movement monitoring device 12b is installed without being turned upside down so that the upper surface side of the pressure-proof explosion-proof monitoring device body 14 is on the upper side, the electric circuit 24 housed in the pressure-proof explosion-proof container 26 is installed. It is easy to perform maintenance. For this reason, in this embodiment, in the movement monitoring device 12b, the explosion-proof type monitoring device main body 14 is attached to the rail 13 without inverting the top and bottom of the pressure-proof and explosion-proof type monitoring device main body 14.

  The explosion-proof radio 8 transmits a control signal output from the processing device 6 to the explosion-proof monitoring devices 12a and 12b, and receives acoustic data and image data output from the explosion-proof monitoring devices 12a and 12b. Then, the information is transmitted to the processing device 6.

  The processing device 6 includes a device that manages acoustic data and image data, a device that mainly performs image processing, and a device that mainly performs movement processing of the explosion-proof monitoring device 12a.

  Thus, the abnormality monitoring system according to the present embodiment is configured.

  Next, a plant abnormality monitoring method using the abnormality monitoring system according to the present embodiment will be described with reference to FIG.

  The processing device 6 wirelessly transmits a serial signal for controlling the explosion-proof type monitoring devices 12 a and 12 b to the pressure-proof and explosion-proof type monitoring devices 12 a and 12 b via the explosion-proof wireless device 8. The control serial signal includes a control signal for moving the explosion-proof monitoring device 12b, a control signal for moving the explosion-proof camera 18 of the explosion-proof monitoring devices 12a and 12b in the horizontal direction and the vertical direction, and explosion-proof. This includes monitoring model information of the type monitoring devices 12a and 12b.

  The explosion-proof explosion-proof monitoring devices 12 a and 12 b installed in the plant acquire monitoring data in the plant based on the information of the control serial signal transmitted from the processing device 6. The operation sound in the plant is collected by the explosion-proof microphone 16 mounted on the explosion-proof monitoring devices 12a and 12b, and the appearance inside the plant can be photographed by the explosion-proof camera 18 mounted on the explosion-proof monitoring device. it can.

  The acoustic data collected by the explosion-proof microphone 16 of the explosion-proof monitoring devices 12 a and 12 b and the image data taken by the explosion-proof camera are wirelessly transmitted to the explosion-proof wireless device 8. Furthermore, in the explosion-proof explosion-proof monitoring devices 12a and 12b, the collected acoustic data and image data can be subjected to data processing with a small data processing load in the electric circuit 24 and then wirelessly transmitted to the explosion-proof wireless device 8. .

  The explosion-proof explosion-proof monitoring device 12 b is a movement monitoring device, and can move along the rail 13 based on a control signal from the processing device 6.

  The monitoring data transmitted to the explosion-proof wireless device 8 is transmitted to the processing device 6 provided in a non-explosion-proof area such as an instrument room, and is processed and monitored by the processing device 6. That is, in the image processing apparatus of the processing apparatus 6, the image data acquired by the explosion-proof type monitoring apparatuses 12a and 12b is compared with a comparison image stored in advance, and a change in the image is detected. Monitoring for abnormalities in In the device for managing the acoustic data, the frequency spectrum is calculated from the acoustic data acquired by the explosion-proof monitoring devices 12a and 12b, and the occurrence of abnormality in the plant is detected by a neural network model.

  In this embodiment, the fixed monitoring device 12 that monitors the monitoring target 10 from the side is installed on the floor near the monitoring target 10, and the mobile monitoring device 12b that monitors the monitoring target 10 from above is located above the plant. Since it is provided so that it can move along the provided rail 13, it is possible to monitor the monitoring object 10 from above and below.

  For example, when an abnormality is detected from the acoustic data from the explosion-proof microphone 16 of the fixed monitoring device 12a, the processing device 6 moves the movement monitoring device 12b to the vicinity of the place where the fixed monitoring device 12a is installed. And the movement monitoring apparatus 12b is moved so that sound pressure may become large in the acoustic data from the explosion-proof microphone 16 of the movement monitoring apparatus 12b. And the monitoring object 10 is monitored from the up-down direction using the fixed monitoring apparatus 12a and the movement monitoring apparatus 12b.

  Further, when an abnormality caused by movement of white smoke or the like is detected from the image data from the explosion-proof camera 18 of the fixed monitoring device 12a, the processing device 6 replaces the movement monitoring device 12b with the fixed monitoring device 12a. Move to the vicinity of. And the processing apparatus 6 moves the movement monitoring apparatus 12b so that a movement vector may become large in the image data from the explosion-proof camera 18 of the movement monitoring apparatus 12b. And the monitoring object 10 is monitored from the up-down direction using the fixed monitoring apparatus 12a and the movement monitoring apparatus 12b.

  When monitoring a plant based on the above method, in some cases, the explosion-proof microphone 16 and the explosion-proof antenna 20 are positioned within the field of view when the monitoring target 10 is viewed from the explosion-proof camera 18, and a blind spot is expected to occur. The In addition, it is expected that the wireless power transmission path viewed from the explosion-proof wireless device is shielded by the structure in the plant. In particular, in the movement monitoring device 12b, there is a high possibility that such inconvenience occurs.

  In the present embodiment, the explosion-proof microphone 16, the explosion-proof camera 18 and the explosion-proof antenna 20 are supported by a support 22 provided separately from the explosion-proof container 26, and the explosion-proof microphone 16, the explosion-proof camera 18 and the explosion-proof antenna 20 are Since the explosion-proof microphone 16, the explosion-proof camera 18, and the explosion-proof antenna 20 are changed in position, the explosion-proof microphone 16, the explosion-proof camera 18, and the explosion-proof antenna 20 are changed. What is necessary is just to change the attachment hole (not shown) for attaching to the plate-shaped support body 22, and it is not necessary to add a change to the explosion-proof container 26. For this reason, according to this embodiment, the attachment positions of the explosion-proof microphone 16, the explosion-proof camera 18, the explosion-proof antenna 20, etc. can be easily changed without a change that requires re-acquisition of the certification test. .

  Further, according to the present embodiment, the attachment portion 28 for attaching the plate-like support 22 to the explosion-proof container 26 is formed not only on the upper surface side but also on the lower surface side of the explosion-proof container 26. . For this reason, it is possible to attach the support body 22 to the lower side of the pressure-proof explosion-proof monitoring device main body 14 without inverting the top and bottom of the pressure-proof and explosion-proof monitoring device main body 14. Therefore, even when the explosion-proof microphone 16, the explosion-proof camera 18 and the explosion-proof antenna 20 are provided on the lower side of the pressure-proof explosion-proof monitoring device main body 14 via the support body 22, the pressure-proof and explosion-proof monitoring device main body 14 is easily maintained. It becomes possible.

[Modified Embodiment]
The present invention is not limited to the above embodiment, and various modifications can be made.

  For example, in the above-described embodiment, the case where the explosion-proof microphone 16, the explosion-proof camera 18, and the explosion-proof antenna 20 are mounted on the explosion-proof explosion-proof monitoring device main body 14 has been described as an example, but the explosion-proof microphone 16, explosion-proof camera 18, and explosion-proof antenna 20 are not necessarily provided. It is not necessary to install everything. For example, the explosion-proof microphone 16 and the explosion-proof antenna 20 may be mounted on the pressure-proof explosion-proof monitoring device main body 14 without mounting the explosion-proof camera 18. Further, the explosion-proof camera 18 and the explosion-proof antenna 20 may be mounted on the explosion-proof explosion-proof monitoring device main body 14 without mounting the explosion-proof microphone 16.

It is the schematic which shows the structure of the abnormality monitoring system by one Embodiment of this invention. It is a side view which shows the explosion-proof type | mold monitoring apparatus (the 1) by one Embodiment of this invention. It is a side view which shows the explosion-proof explosion monitoring apparatus (the 2) by one Embodiment of this invention. It is a side view which shows the case where an explosion-proof microphone, an explosion-proof camera, etc. are directly attached to a pressure-proof explosion-proof monitoring device.

Explanation of symbols

6 ... Processing device 8 ... Explosion-proof radio 10 ... Monitoring object 12a ... Explosion-proof type monitoring device, fixed monitoring device 12b ... Pressure-proof explosion-proof type monitoring device, movement monitoring device 13 ... Rail 14 ... Explosion-proof type monitoring device body 16 ... Explosion-proof microphone 18 ... Explosion-proof camera 20 ... Explosion-proof antenna 22 ... Support 24 ... Electrical circuit 26 ... Explosion-proof container 28 ... Mounting portion 29 ... Screw hole 30 ... Screw 114 ... Explosion-proof type monitoring device body 116 ... Explosion-proof microphone 118 ... Explosion-proof camera 120 ... Explosion-proof antenna 126 ... Explosion-proof container

Claims (3)

A pressure-proof explosion-proof container having a pressure-proof structure that accommodates at least an electric circuit, and a pressure-proof explosion-proof container having a mounting portion formed on at least one of an upper surface side and a lower surface side;
A support attached to the attachment part of the explosion-proof container;
A flameproof explosion-proof monitoring device comprising: a camera and an antenna or a microphone and an antenna supported by the support. An explosion-proof explosion-proof container of at least an explosion-proof structure in which an electric circuit is accommodated,
Camera and antenna, or pressure-resistant explosion-proof container, wherein a mounting portion for mounting the support for supporting the microphone and the antenna is formed on at least one of the upper surface or the lower surface side. A pressure-proof explosion-proof container having a pressure-proof structure that accommodates at least an electric circuit , wherein a pressure-proof explosion-proof container having a mounting portion formed on at least one of an upper surface side and a lower surface side, and the mounting portion of the pressure-proof explosion-proof container a support attached to the supported by the support member, the camera and the antenna, or a malfunction monitoring system using a plurality of pressure-resistant explosion-proof monitoring device having a microphone and an antenna,
In the one explosion-proof type monitoring device for monitoring a monitoring target, the support is attached to the upper surface side of the pressure-proof explosion-proof container,
In another explosion-proof explosion-proof monitoring device that monitors the monitoring target from above, the support is attached to the lower surface side of the explosion-proof container.

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