JP4388882B2 - Curved survey cylinder - Google Patents

Description

  The present invention relates to a curve surveying cylinder for enabling curve propulsion construction using a standard excavator for straight lines (hereinafter referred to as a standard excavator) in curve propulsion work for small-diameter pipes.

  In the propulsion method, a start shaft and a reach shaft are provided at both ends of the planned pipeline. It is a construction method in which a standard excavator is made to reach the reaching shaft by propelling the pipe row, and a pipe rod is constructed between the starting shaft and the reaching shaft.

  Conventionally, the propulsion pipe has been laid in a straight line because the rear end surface of the propulsion pipe is pushed out by a hydraulic jack. In the small diameter pipe propulsion construction, humans cannot enter the propulsion pipe and work, so the standard excavator is operated remotely. The position measurement of the standard excavator is performed by irradiating the target installed in the standard excavator with the laser beam of the optical equipment installed in the start shaft. As a method of correcting the standard excavator when the position is misaligned, the standard excavator outer shell is divided into a front cylinder and a rear cylinder and fitted so that they can be bent, and a plurality of directional control jacks are fitted to the fitting part. In general, a method is used in which the front cylinder and the rear cylinder of the standard excavator are bent back and forth to make corrections by extending and retracting the direction control jack.

  In recent years, propulsion construction of small-diameter pipes has a tendency to be long-distance, and plans for propulsion construction including curves have increased. With the standard excavator described above, it is possible to create the curve planned by the direction control jack, but when the standard excavator position measurement is a laser irradiation method, there is a prospect of a curved shape from the start shaft to the excavator position. There is a problem that the laser beam cannot be irradiated.

  For this reason, a surveying system has been developed in which a small-diameter pipe-dedicated excavation machine is newly manufactured and moved by the ultra-compact measuring robot equipped with an optical fiber gyroscope in the curved pipe. However, the above-described technique requires the production of a dedicated curve excavator and a surveying robot, which is very expensive and expensive. In addition, there is a problem that it is necessary to install a rail material and a guide tube for running the surveying robot over the entire length of the propulsion tube, and that much time is required for its installation and removal.

In addition, as a standard excavator position measurement method, multiple connecting moorings are arranged in the center of the pipe from the front propulsion pipe to the rear propulsion pipe, and the connection angle formed by the front and rear connection lines is the connection angle. Measured with a measuring instrument and corrected the projection angle obtained by projecting the inclined connection angle generated by rolling of the propulsion pipe on the horizontal plane to the connection angle, and the connection angle is determined from the connection angle and the connection length. A technique for determining the position of the excavator from the sum of the x components and the sum of the y components of the connecting lines has been developed. The above-described technique has a problem that a precise and expensive connecting mooring device and connecting angle measuring device must be arranged in the propelling pipe, and the construction cost is very high like the surveying robot. In addition, after the completion of the propulsion, a plurality of connecting mooring devices and connecting angle measuring devices arranged in the propelling pipe must be carefully collected, and there is a problem that a lot of time is spent on the removal work.
JP 2003-97186 A

  The problem to be solved is to provide a curve surveying cylinder capable of reliably performing curve surveying at a low cost using a standard excavator for curve promotion work of a small-diameter pipe.

The present invention provides a curve surveying cylinder for enabling curve propulsion construction using a standard digging machine for straight lines of small-diameter pipes, and has an outer diameter substantially the same as the outer diameter of the digging machine behind the standard digging machine. A curving surveying cylinder in which a first cylinder made of a non-magnetic material having a shell and a second cylinder made of a steel material having an outer shell substantially the same diameter as the outer diameter of the excavator are connected to the rear of the first cylinder. The connecting part of the front and rear cylinders is bendable, the electromagnetic induction transmitter and the gyro sensor unit are mounted in the first cylinder, and the gyro sensor unit is operated in the second cylinder. The main feature is a curved surveying cylinder equipped with a gyro control unit and a gyro power supply unit.

  By connecting the surveying cylinder for curves of the present invention to a standard excavator, the gyro sensor unit and electromagnetic induction transmitter mounted in the first cylinder, which is a surveying cylinder for curves, can be used for true north of the first cylinder. Detect azimuth and horizontal plane coordinates. By continuously managing this measurement data, it became possible to reliably determine the attitude of the standard excavator and the trajectory of the horizontal plane position.

  In curve promotion construction of small-diameter pipes, a curve is created with a standard excavator, and the attitude and horizontal plane position of the standard excavator are reliably measured by a curved surveying cylinder that follows the standard excavator, thereby reducing the cost of the curve. Promotion was realized.

  FIG. 1 is a longitudinal sectional view for explaining a curved survey cylinder according to a first embodiment of the present invention. The standard excavator 1 is equipped with a plurality of directional control jacks in the circumferential direction of the fitting portion between the front cylinder and the rear cylinder (not shown). A first reduced diameter cylinder 3 having a reduced diameter so as to come into contact with the inner peripheral surface of the standard digging machine outer shell 2 at the rear end of the standard digging machine 1 is installed extending rearward. A first cylindrical body 4 having an outer shell 5 having substantially the same diameter as the inner and outer diameters of the standard excavator outer shell 2 is fitted so as to cover the first reduced diameter cylinder 3. A second cylinder 6 having an outer shell 8 having the same diameter as the inner and outer diameters of the standard excavator outer shell 2 is disposed behind the first cylinder 4, and the inside of the outer shell 8 at the tip of the second cylinder 6 is disposed. A second reduced diameter cylinder 7 having a reduced diameter so as to come into contact with the peripheral surface is installed extending forward. A curve formed by being bent and inserted into the rear end of the first cylindrical body 4 having the outer shell 5 having the same diameter as the inner and outer diameters of the standard excavator outer shell 2 so as to cover the second reduced diameter cylinder 7. Surveying cylinder. A reduced diameter portion of the propulsion pipe 19 is fitted and connected to the rear end of the second cylinder 6.

  A ring-shaped rubber ring is installed at the fitting portion of the first reduced diameter cylinder 3 and the second reduced diameter cylinder 7 to block intrusion of groundwater or the like. On the vertical center line of the center of the first cylinder 4, an electromagnetic induction transmitter 9 is installed at the top, and a gyro sensor unit 10 is installed below. A laser pointer 15 for irradiating laser light is installed on the vertical center line behind the first cylinder 4. In addition, a hydraulic pressure difference level sensor 12 for measuring a vertical difference in height is installed. Although the electromagnetic induction transmitter 9 and the gyro sensor unit 10 have been disclosed as a method of installing on the center line in the vertical direction, if it is difficult to install on the center line, the electromagnetic induction transmitter 9 and the gyro sensor unit 10 are moved by a predetermined distance from the center line, It is also possible to correct the movement distance.

  An electromagnetic induction transmitter 9 is installed in the first cylindrical body 4, and an alternating magnetic field generated by the electromagnetic induction transmitter 9 is received by a ground receiver to measure the position coordinates of the electromagnetic induction transmitter 9 on the ground. A guided survey is performed. For this reason, the outer shell 5 of the first cylinder 4 in which the electromagnetic induction transmitter 9 is installed is made of stainless steel, which is a non-magnetic material, so that the alternating magnetic field generated by the electromagnetic induction transmission coil 9 is not deformed by a magnetic material such as steel. Produced.

  A gyro control unit 13 for operating the gyro sensor unit 10, a gyro power supply unit 14, and a gyro connection box 18 are mounted in the second cylinder 6. In addition, the target 11 is installed at a position facing the laser pointer 15 installed on the vertical center line behind the first cylinder 4, and the target 11 is irradiated with laser light. A laser power source 16 is installed behind the target 11. The outer shell 8 of the second cylinder 6 is made of a steel material that is usually used.

  The coordinates of the laser beam of the laser pointer 15 irradiated on the target 11 are projected by the TV camera 17 installed behind the target 11 in the second cylinder 6 and transmitted to the central shaft or the central control room outside the shaft. The bending angle between the first cylinder 4 and the second cylinder 6 is calculated, and the attitude of the first cylinder 4 with respect to the second cylinder 6 is managed.

  In the 1st cylinder 4 and the 2nd cylinder 6, the gyro sensor unit 10 and gyro control which have been arranged below in the feed mud pipe and the drain pipe for carrying out the earth and sand excavated with the standard excavator 1 In order not to interfere with the unit 13, piping is provided in the spaces on both sides below.

  The gyro sensor unit 10 in the first cylinder 4, the gyro control unit 13 in the second cylinder 6, and the laser pointer 15 are firmly fixed to a frame or the like so as not to move or vibrate during propulsion.

  The gyro sensor unit 10 frame, the feed / drainage pipe and the earth discharge pipe in the first cylinder 4 are made of a non-magnetic material such as stainless steel so as not to affect the alternating magnetic field generated by the electromagnetic induction transmission coil 9.

  The gyro sensor unit installed in the first cylinder 4 continuously detects the azimuth angle of the first cylinder 4 with respect to the true north, thereby calculating the attitude of the first cylinder 4 with respect to the planned curve and performing standard digging. The orientation of the machine 1 can be determined. Further, by continuously detecting the alternating magnetic field of the electromagnetic induction transmitter 9 installed in the first cylinder 4 by the ground receiver, the coordinates on the horizontal plane of the electromagnetic induction transmitter 9 are detected. The posture with respect to the planned curve can be calculated. By collating the two data in this way, it is possible to perform reliable survey management without any measurement error.

  In the propulsion work, it can be applied to the curve propulsion construction of small-diameter pipes that can perform curve surveying with high accuracy at low cost by using a standard excavator for straight lines and a surveying cylinder for curves.

It is a longitudinal cross-sectional view explaining the surveying cylinder for curves of Example 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Standard excavation machine 2 Standard excavation machine outer shell 3 1st reduced diameter cylinder 4 1st cylinder 5 Outer shell 6 2nd cylinder 7 2nd reduced diameter cylinder 8 Outer shell 9 Electromagnetic induction transmitter 10 Gyro sensor unit 11 Target 11
12 Hydraulic Pressure Difference Sensor 13 Gyro Control Unit 14 Gyro Power Supply 15 Laser Pointer 16 Laser Power Supply 17 TV Camera 18 Gyro Connection Box 19 Propulsion Tube

Claims (1)

In a surveying cylinder for curve that enables curve propulsion construction using a standard excavator for straight line of small-diameter pipes, a non-circular cylinder having a shell substantially the same diameter as the outer diameter of the excavator is provided behind the standard excavator. A curving surveying cylinder in which a first cylindrical body made of a magnetic material and a second cylindrical body made of steel having an outer shell having a diameter substantially equal to the outer diameter of the excavator are connected to the front and rear of the first cylindrical body. gyro for the connection of the cylindrical body fitted bendable, said the first cylindrical body equipped with an electromagnetic induction transmitter and gyro sensor unit, wherein the second tubular body to operate the gyro sensor unit A surveying cylinder for curves, which is equipped with a control unit , a gyro power supply unit, and the like.

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