JPH0989783A - Mobile monitoring apparatus for conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile monitoring apparatus, for a conduit, whose structure is compact, which is excellent in expolsionproofness, which makes use of the advantage of a driving system by a magnet-type synchronous linear motor and which is economical regarding the movement monitoring apparatus for the conduit which is installed inside a tunnel or the like. SOLUTION: This mobile monitoring apparatus is provided with a guide rail 2 which is laid along the monitoring route of a conduit and with a running body 5 which is run on the guide rail by a magnet-type synchronous linear motor. The guide rail 2 is a steel guide rail. A permanent magnet 13 for the running body is provided with a ferromagnetic-substance back core, and it is attached so as to sandwich the steel guide rail.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movement monitoring device for a conduit installed in a tunnel or a factory.

[0002]

2. Description of the Related Art Pipes for transporting fluids such as flammable gas laid in tunnels or factories have a risk of cracks, cracks, bends or other defects due to corrosion, earthquakes or ground movements. Therefore, it is important to prevent the occurrence of serious accidents by predicting the occurrence of such defects and detecting them early.

As a monitoring method therefor, there are a method in which a person goes around to monitor and a method in which a fixed monitoring device is installed at a predetermined interval to monitor.

However, the method in which a person goes around has problems such as monitoring efficiency and safety, and is limited to special cases.

Further, in the monitoring by the fixed monitoring device, there is a concern that a blind spot may occur especially in the middle part between the fixed monitoring devices,
Therefore, even if an abnormality such as a gas leak occurs, detection may be delayed and a serious accident may occur.

Therefore, instead of the fixed monitoring device, a mobile monitoring device for efficiently performing a wide area monitoring is being studied.

As a representative example thereof, Japanese Patent Laid-Open No. 5-32277
Japanese Patent Laid-Open Publication No. 7-27 discloses a guide rail in which a plurality of exciting coils are arranged at intervals in the length direction, and a traveling body suspended by wheels from the guide rail. The traveling body is made to travel by synchronizing the attraction and repulsion of the permanent magnet and the exciting coil in the driving direction, and the traveling body is made to travel along the guide rail by the drive by a so-called magnet type synchronous linear motor, Disclosed is a mobile monitoring device in which a traveling device is equipped with an inspection device for detecting anomalies and a receiver / transmitter for transmitting and receiving monitoring information and the like, and remotely monitoring a conduit laid in a tunnel. There is.

Since this movement monitoring device is driven by a magnet type synchronous linear motor, a current collector is not required, no spark is generated by it, and it is not necessary to generate an eddy current unlike an induction type linear motor. There is no danger of explosion, even if it is filled with combustible gas, because the device does not get hot. Also, since it can be operated remotely, it can be run even in an oxygen deficient state.

As described above, the above-mentioned movement monitoring device has an advantage that the monitoring of a long-distance conduit can be performed safely and quickly.

[0010]

However, in the movement monitoring device disclosed in the above-mentioned Japanese Patent Laid-Open No. 5-322777,
Although a magnetic synchronous linear motor is used as a drive system, as described in the embodiment, it should be set so that there is a slight gap between the exciting coil of the guide rail and the permanent magnet of the traveling body. Is assumed. Therefore, the permanent magnets of the running body are easily attracted to the guide rails themselves, which causes a loss of driving force.To prevent this, the guide rails should be made of a non-magnetic material such as aluminum. Is needed.

Therefore, there are drawbacks that the material cost becomes high and that the mounting accuracy is required and the construction efficiency becomes poor.

The present invention is intended to solve the above-mentioned problems, and to provide a more economical apparatus for monitoring the movement of a conduit while taking advantage of the drive system using a magnetic synchronous linear motor. The purpose is.

[0013]

SUMMARY OF THE INVENTION A conduit movement monitoring device according to the present invention comprises a guide rail laid along a conduit monitoring route, in which exciting coils are arranged at regular intervals in the longitudinal direction, and a monitoring device. In a movement monitoring device equipped with a traveling body mounted and driven by a magnetic synchronous linear motor to travel on the guide rail, the guide rail is a steel guide rail, and the permanent magnet attached to the traveling body is A device for monitoring movement of a conduit, which is a permanent magnet having a ferromagnetic back core and is mounted so as to be on both sides of the steel guide rail.

Since the guide rail made of steel, which is a ferromagnetic material, is used as the guide rail, it plays the role of the back core of the exciting coil and increases the magnetic force on the exciting coil side. On the other hand, attaching a ferromagnetic back core to the permanent magnet also increases the magnetic force on the permanent magnet side. As a result, it is possible to make a large gap between the exciting coil and the permanent magnet. Further, since the permanent magnets mounted so as to sandwich the guide rail cancel each other's attraction force with respect to the guide rail, there is no loss of driving force.

As described above, the conduit movement monitoring apparatus of the present invention uses an inexpensive steel guide rail as the guide rail while utilizing the advantage of the drive by the magnet type synchronous linear motor, and the mounting thereof is also highly accurate. Because it doesn't have to be
It can be said that it is a mobile monitoring device that enables safe and quick monitoring and is economically efficient.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic vertical sectional view showing an embodiment of the present invention. In FIG. 1, 1 is a guide device,
It is composed of a guide rail 2, a plurality of exciting coils 3 provided on the side surface thereof, and a sensor 4.

Reference numeral 5 denotes a traveling body, which is composed of drive devices 6a and 6b and a main body 7 to which they are attached. Two drive devices 6a and 6b are attached here, but the number of drive devices can be increased if necessary.

The main body 7 contains a transmitting / receiving device 8, a controller 9, a detector 10, a monitoring device 11 and the like necessary for monitoring.

The drive mechanism of the drive devices 6a and 6b uses a magnet type synchronous linear motor as shown in FIGS. 2 and 3 which will be described later.

By attracting or repelling the multi-pole magnet 13 of the magnet block 12 and the exciting coil 3 provided on the side surface of the guide rail 2, a thrust is applied to the traveling body 5 in a non-contact manner to rotate the magnet block 12 on both sides. The guide unit 1 is provided with the traveling body 5 via the weight supporting wheels 14 that are freely attached.
And hang it on the guide rail 2.

The use of the multi-pole magnet 13 has an advantage that the driving force is smoothly generated by switching between attraction and repulsion and the traveling property is stabilized.

The driving power is obtained by connecting one end of the linear power supply cable 15 to the end of the guide device 1 and connecting the other end to the main power supply of the operating mechanism 16 provided outside the system to supply electric power.

Monitoring information continuously obtained by the inspection device 8, the controller 9, the detector 10, the monitoring device 11 and the like built in the main body 7 is input to the operating mechanism 16 by the leak synchronization cable 17. The leak synchronization cable 17 receives the monitoring information wirelessly and sends it to the controller 9 for commanding, if necessary. The leak synchronization cable 17 is transmitted and received with high precision by the amplifier 18.

The main body 7 has a hermetically sealed structure, and contains an inspection device 8, a controller 9, a monitoring device 11, and a battery 26.

Further, an obstacle detector by infrared rays and ultrasonic waves, and a monitor device 11 by a TV camera are provided at the front and rear portions.
It is housed and attached to the monitoring containers 27a and 27b.

A monitoring container 27c is provided in the center of the main body 7, and the monitoring device 11 such as a TV camera is put in a case 36 and stored in the monitoring container 27c. A pressure resistant optical glass 28 is attached to the window so that an obstacle can be monitored through this.

The monitoring container 27c is fitted in the main body 7 with a recess 7a. Then, the elevating mechanism 25 is driven to ascend and descend to project from the main body 7a so that the photographing range can be widened.

As an explosion-proof method, the monitoring nitrogen cylinder 29 is housed in the main body 7, connected to a regulator 31 and a valve 32 attached to the main body 7 with a tube 30, and supplied at a predetermined pressure inside. Inside, a pressure gauge 33 and an oxygen concentration meter 34 are provided to measure the pressure and the oxygen concentration, and the valve 32 regulates the nitrogen supply pressure.

FIG. 2 is a schematic vertical sectional view showing the rail structure of the guide device of the present invention and the drive equipment of the movement monitoring device.
FIG. 3 is a diagram showing a cross section taken along the line AA on the left side of the rail center (one-dot chain line) in FIG. 2 and a cross section taken along the line BB arrow on the right side of the rail center (one-dot chain line).

In FIGS. 2 and 3, the guide device 1 is a non-magnetic case in which an H-shaped steel rail is used for the guide rail 2 and an elliptic exciting coil 3 and a sensor 4 which are appropriately separated from each other are attached to the side surfaces thereof. 19 is attached. The non-magnetic case 19 can be attached without being limited to bilateral symmetry. The exciting coil 3 is wired to the linear power supply cable 15 for each of a plurality of phases (for example, three phases) and is connected to the power supply control device.

The drive device 6a of the traveling body 5 is the guide device 1
Magnet block 12 having a multi-pole magnet 13 mounted so as to sandwich the guide rail 2 of FIG.
And a pair of weight supporting wheels 14 rotatably mounted on both sides of the magnet blocks 12 and side rails 22a, 22b, 22c for steadying rolling contact with the upper and lower edges of the guide rail 2. It is composed of a pair of wheel blocks 21 assembled by. The mounting holes of the side surface rollers 22a to 22c are oblong so that the gap can be adjusted.

By using a steel guide rail which is a ferromagnetic material for the guide rail 2, it plays the role of a back core of the exciting coil 3 and increases the magnetic force on the exciting coil side. On the other hand, attaching the ferromagnetic back core 20 to the permanent magnet 13 also increases the magnetic force on the permanent magnet side. As a result, it is possible to make a large gap between the exciting coil 3 and the permanent magnet 13. Further, since the permanent magnets mounted so as to sandwich the guide rail 2 cancel each other's attraction force with respect to the guide rail, there is no loss of driving force.

The drive device 6a of the traveling body 5 is supported by a slidable support member 24 and is connected to the main body 7.
A telescopic damper 23 with air pressure applied to both end surfaces
Lateral shake is prevented by a and 23b.

The traveling body 7 is suspended by the guide device 1 by the attraction or repulsion of the multi-pole magnet 13 of the magnet block 12 of the plurality of drive devices 6a and 6b and the exciting coil 14 and travels on the guide rail 2.

FIG. 4 is a diagram showing a monitoring state of the movement monitoring device for the curved portion of the monitoring route. In this, weight supporting wheels 14 are suspended from both sides of the guide rail 2 while supporting the weight of the traveling body 5. In addition, a plurality of pairs of side surface rollers 22a to 22c are in rolling contact with the upper and lower edges of the H-shaped guide rail 2. As a result, the magnet block 12 and the wheel block 21 are
Is prevented from swinging left and right.

The drive devices 6a and 6b are provided on the main body 2
An appropriate distance (eg, a coil width of a multiple of 3 in the case of three phases) is attached to one position and separated.

When passing through the curved portion 2a of the guide rail 2, the wheel block 21 rotates following the curved portion 2a, so that the magnet block 12 between the wheel blocks 21 has the curved portion 2a.
Since it moves parallel to the tangent to a, it can pass through the optimum position, and the radius of curvature of the curved portion 2a can be minimized.

[0039]

FIG. 5 is a view showing a state in which the movement monitoring device of the present invention is installed and monitored in a tunnel in which a conduit is laid.

FIG. 6 is a perspective view showing a part of the movement monitoring apparatus of the present invention in FIG. In FIG. 5 and FIG. 6, the guide device 1 laid along the monitoring route of the conduit 41 laid in the tunnel 35, the traveling body 5 suspended by the guide device 1, and the traveling body 5 connected to the outside of the system. Operation mechanism 16 installed in
The magnetic synchronous linear motor is used as a drive mechanism of the traveling body 5. Here, two series of conduits 41 are laid in the tunnel 35 on the pedestal 39, and the mobile monitoring device of the present invention is provided in the upper two systems and in the lower two systems for the purpose of complete monitoring.

A low-floor type traveling body 5a traveling on the guide rail 2a is used for the guide device 1a provided at the lower portion so that a narrow place can be monitored. The traveling body 5 of each system is configured by attaching a plurality of driving devices 6a and 6b each including a magnet block and a wheel block to a main body 7 having a transmitter / receiver device, a controller, a detector, a monitoring device and the like built therein. .
As described above, attraction or repulsion between the plurality of exciting coils 3 provided on the side surface of the guide rail 2 of the guide device 1 and the multipole magnet 13 of the magnet block 12 mounted so as to sandwich the guide rail 2 of the movement monitoring device 5. Drive device 6a, 6
The movement monitoring device 5 travels on the guide rail 2 while monitoring the conduit 41 via b. Reference numeral 40 is a lighting device in the tunnel.

Monitoring information of the TV camera, the gas detector, etc. by the traveling body 5 is wirelessly received by the leaky coaxial cable 17, and the monitoring information is sent to the monitoring device 37 of the monitoring center provided outside the system as the monitoring operation mechanism 16. Where appropriate action is taken.

On the other hand, based on the monitoring information, a command is sent to the controller of the mobile monitoring device 5 through the leaky coaxial cable 17, and the treatment is performed.

The operation is performed by the monitoring operation mechanism 16 in which various operation signals from the monitoring center are converted into serial signals and modem signals via a controller such as a sequencer and wirelessly transmitted, which is attached to the main body 7. The signal is received by an antenna, amplified and returned to a modem signal and a serial signal, enters a built-in controller 9, and drives an internal device via a relay or the like.

According to the present invention, since the traveling body 5 uses the magnet type synchronous linear motor as the drive mechanism, the traveling body 5 can be downsized, and a plurality of vehicles are provided in the upper part of the tunnel so as not to obstruct the passage of a person. It is possible to monitor a narrow place by installing the guide rail 2 or using the low-floor type movement monitoring device 5a. It is excellent in explosion-proof because it is monitored by driving it in a non-contact manner by remote control.

Even when the movement monitoring device 5 according to the present invention passes through the curved portion 5a of the guide device 1, the wheel rotates following the curved portion 5a similarly to the horizontal portion, so that the movement monitoring device 5 moves parallel to the tangent to the curved portion 5a. The guide rail can be selected to have the smallest radius of curvature at the curved portion.

[0047]

INDUSTRIAL APPLICABILITY As described above, the conduit movement monitoring device of the present invention has the advantage of being driven by a magnetic synchronous linear motor and uses an inexpensive steel guide rail, so it is safe and quick. There is also an economical monitoring of the conduit.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic vertical sectional view showing a rail structure of a guide device of the present invention and a drive unit of a traveling body.

FIG. 3 AA on the left side of the center of the rail in FIG. 2 (one-dot chain line)
It is a figure which shows the cross section by the arrow line view, and the cross section by the BB line arrow on the right side.

FIG. 4 is a diagram showing a monitoring state of a movement monitoring device at a curved portion of a monitoring route.

FIG. 5 is a diagram showing a monitoring situation of a conduit in a tunnel by a movement monitoring device.

6 is a perspective view showing a monitoring situation of a monitoring section in FIG.

[Explanation of symbols]

 1 Guide Device 2 Guide Rail 3 Excitation Coil 4 Sensor 5 Traveling Body 6a, 6b Driving Device 7 Main Body 8 Transmitting / Receiving Device 9 Controller 10 Detector 11 Monitoring Device 12 Magnet Block 13 Multipolar Magnet 14 Weight Support Wheel 15 Linear Power Cable 16 Monitoring Operation Mechanism 17 Leakage Synchronous Cable 18 Amplifier 19 Non-Magnetic Case 20 Back Core 21 Wheel Blocks 22a-22c Side Rollers 23a, b Damper 24 Supporting Member 25 Lifting Device 26 Battery 27 Monitoring Container 28 Optical Glass 29 Monitoring Nitrogen Cylinder 30 Tube 31 Regulator 32 Valve 33 Pressure Gauge 34 Oxygen Concentration Meter 35 Tunnel 36 Case 37 Monitoring Device 38 Supporting Member 39 Frame 40 Lighting Device 41 Conduit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Osamu Araki 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Inside Nihon Kokan Co., Ltd.

Claims (1)

[Claims] 1. A guide rail, which is laid along a monitoring route of a conduit and in which exciting coils are arranged at regular intervals in a longitudinal direction thereof, and a monitoring device are mounted and driven by a magnetic synchronous linear motor. In a movement monitoring device including a traveling body traveling on a guide rail, the guide rail is a steel guide rail, and the permanent magnet attached to the traveling body is a permanent magnet having a ferromagnetic back core. A device for monitoring the movement of a conduit, wherein the device is attached so as to be on both sides of the steel guide rail.