JPH0747247Y2 - Electric in-pipe moving cart - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric pipe carrier for inspecting and inspecting the inside of a seawater pipe for cooling water such as a thermal power plant that takes in seawater or a nuclear power plant. As an electrically-driven mobile carriage in a seawater pipe that has been developed in the past, there is Japanese Patent Publication No. 63-44435 "Pipe removal device for pipes", which has a large pipe inside diameter and removes deposits on the carriage. It has been developed for a large-diameter pipe that can be installed, and the substrate of the removal device does not have to consider deformation even if a person rides on it, and it is a small-diameter seawater pipe that an operator can finally put in. Not applicable.

[0002]

2. Description of the Related Art Workers ride a manual trolley to remove shellfish and algae adhering to the inner wall of seawater pipes of thermal power plants and nuclear power plants that send seawater, inspect the inner wall, and perform pinhole inspection. .

[0003]

[Problems to be Solved by the Invention] In cleaning the inside of the seawater pipe, since the worker rides on the carriage and holds the cleaning tool, it is very difficult to move inside the pipe with a manual carriage that pushes the inner wall by hand. . Also, in a manual dolly, you will push forward on the inner wall with the power of both arms in a sitting position, and you will be carrying cleaning tools such as scrubbing brushes and sponges, and equipment such as cameras and pinhole inspection devices into the pipe. The work is difficult, and it is very easy to get tired in the pipe, resulting in poor work efficiency.

Further, the inner wall lining is often damaged by the contact of carry-in equipment during the movement in the pipe.

[0005]

In view of the above-mentioned circumstances, the present invention can easily move an in-pipe moving carriage by using power in a narrow pipe, and visually inspect the lining inside the pipe, lining pinhole inspection, The coating lining can be repaired, the inside of the pipe can be cleaned, final confirmation can be made before passing water, and the weight is easy to carry and the structure is extremely simple. A caster shaft 7 having a caster bracket 4 fixed thereto and rubber wheels 8 fixed thereto is rotatably provided on the caster bracket 4, a universal joint 12 is provided at an inner end of both caster shafts 7, and both universal joints 12 are slid in an axial direction. Connected by a spline shaft 13 that moves and expands and contracts, and one caster shaft 7
Drive motor mounted on the underside of the base plate 2 and the gear 16 fixed to the
An electric in-pipe moving carriage having a drive mechanism in which a gear 29 fixed to the output shaft 27 of 21 is meshed.

[0006]

The caster bracket 4 is fixed to the lower surface of the arc-shaped substrate 2 so as to face the traveling direction, and the caster shaft 7 to which the rubber wheel 8 is fixed is rotatably provided on the caster bracket 4. An output shaft of a drive motor 21 mounted on the lower surface of the base plate 2 and a gear 16 fixed to one caster shaft 7 and connected by a spline shaft 13 that slides and expands and contracts in the axial direction with a universal joint 12 interposed at the inner end. Since the gear 29 fixed to 27 meshes with the gear, the operator rides on the arc-shaped substrate, and the spline shaft is interposed even if the casters expand due to the deflection of the substrate, so the driving force from the motor is applied to both wheels. Can be fully transmitted to drive the trolley sufficiently.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on a specific embodiment shown in the accompanying drawings. FIG. 1 is a bottom view of the electric in-pipe moving cart, FIG. 2 is a front view, FIG. 3 is a detailed view of a drive section, and FIG. 4 is a detailed view of drive wheel sections.

In the electric pipe moving carriage of the present invention, a square aluminum flat plate is placed on an arc-shaped substrate 2 which is concentric with the inner wall of the seawater pipe 1 so that an operator can put the seawater pipe in a relatively small diameter. Form. Therefore, it is lightweight and versatile,
If the operator weighs about 80 kg, put it in the pipe. This board 2
A cushion mat 3 is attached to the upper surface of the so as to make it easier for an operator to sit.

At the four corners of the lower surface of the substrate 2, there are caster brackets 4 made of sheet metal having a U-shaped cross section so as to face the traveling direction.
Is fixed to the bolt 5 and the nut 6 by screwing. A rubber wheel 8 is screwed and fixed to the caster shaft 7 with a screw 9, and the caster shaft 7 is rotatably supported by a bearing 11 installed in a bearing case 10 that is fixed to the bracket 4 by welding. Position rotatably to 4. The rubber wheel 8 thus arranged as a fixed caster is vertically provided on the arc-shaped substrate 2 and comes into contact with the inner wall of the seawater pipe 1 from the vertical direction so that the rubber wheel 8 can move straight in the pipe.
A free caster cannot go straight.

Both caster shafts are extended by the inner end side of the caster shafts 7 of both fixed casters on the front side to the inside, and a universal joint 12 is interposed at the inner end to slide and expand and contract in the axial direction. Connect 7 Spline shaft
Reference numeral 13 is configured such that a spline cylinder 15 is externally fitted to a spline rod 14, slides in the axial direction and is expandable and contractible, and a rotational force can be transmitted.

Even if an operator rides on the base plate 2 and the distance between the rubber wheels 8 expands, the spline shaft 13 extends and the power of the motor can be transmitted, and when the worker descends from the base plate 2 and the distance between the rubber wheels 8 becomes shorter, the spline is splined. The shaft 13 also becomes shorter accordingly. Since the rubber wheel 8 is used, the inner surface of the seawater pipe 1 is not damaged. A bevel gear 16 is fixed by screws 17 between the universal joint 12 of the one caster shaft 7 on the front side and the bearing case 10. Since the universal joint 12 and the spline shaft 13 are used, the displacement of the rubber wheels 8 and the displacement of the bevel gears 29 and 16 do not occur due to the deflection of the substrate 2.

The drive motor 21 is fixed to the lower surface of the substrate 2, and has a motor 22, a speed change mechanism 23 and a variable torque clutch 2.
4.The output shaft 27 is rotatably supported by the keyless chuck 25 and the bearing 26, and the bevel gear 29 screwed to the tip of the output shaft 27 by the screw 28 is arranged so as to mesh with the bevel gear 16. ing. The drive motor 21 has a variable drive torque, can prevent unreasonable movement, can switch the speed in two stages of high speed and low speed, and can select the moving speed of the carriage according to the work. Since the bevel gear 29 is connected to the keyless chuck 25, when the battery runs out, the bevel gear 16 can be disengaged from the bevel gear 16 without a tool and the vehicle can be driven manually.

Further, a battery holder 31 and a battery pack 32 are provided on the lower surface of the substrate 2, and one-touch replacement is possible, and a spare battery can be replaced in the pipe without tools. With one pack of battery, you can continue for 200m, and you can work on a half-day basis. In the pinhole inspection, you can move about 70m a day, and you can extend the usage time by carrying a spare battery. In addition, the charging time is as short as 15 minutes when fully charged, and it can be charged during breaks. It is possible to run for about 100m even with temporary charging for 3 minutes. There is no danger of electric shock because the battery uses low voltage.

An operating switch 33 is provided on the front side portion of the substrate 2 to allow the vehicle to go straight or backward. Reference numeral 34 is a bracket for pulling or suspending the main carriage by a rope or the like. Further, daily commodities can be used as the constituent parts of the bogie, and the constituent parts are easily available and inexpensive.

Furthermore, one main carriage can be used to work in pipes having different pipe diameters, and can be used as a main steam pipe. In this bogie, the operation switch 33 is actuated to supply a current from the battery to the drive motor 21, power is transmitted from the bevel gear 29 of the output shaft 27 to the bevel gear 16, and one of the caster shafts 7 is rotated to move the rubber wheel. 8 is rotated, the other caster shaft 7 is rotated by the spline shaft 13, and the rubber wheel 8 is rotated to drive the carriage.

[0016]

As described above, according to the present invention, the caster bracket 4 is fixed to the lower surface of the arc-shaped substrate 2 so as to face the traveling direction, and the caster shaft 7 to which the rubber wheel 8 is fixed is attached to the caster bracket 4. Rotatably mounted on one of the caster shafts 7, a universal joint 12 is interposed between the caster shafts 7, and the spline shaft 13 is slidable in the axial direction so as to expand and contract. Fixed to the output shaft 27 of the drive motor 21 mounted on the underside of the
Since this is an electric pipe moving carriage that meshes with 29, even if an operator rides the narrow circular seawater pipe 1 on the substrate 2 and the substrate 2 bends and the distance between the rubber wheels 8 expands and contracts, the universal joint 12 and spline shaft 13 intervene to reliably transfer the driving force to the rubber wheel 8 so that it can be moved easily. Visual inspection of lining inside the pipe, lining pinhole inspection, lining repair of keren / painting, cleaning inside pipe, The final confirmation can be made in front of the water, and it is lightweight, easy to carry, and has an extremely simple structure. Further, since the present invention uses the rubber wheel 8, it does not damage the inner surface of the seawater pipe 1.

[Brief description of drawings]

FIG. 1 is a bottom view of an electric in-pipe moving carriage according to a specific embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a detailed view of a drive unit.

FIG. 4 is a detailed view of a drive wheel unit.

[Explanation of symbols]

 2 ... Arc-shaped substrate 4 ... Caster bracket 8 ... Rubber wheel 12 ... Universal joint 13 ... Spline shaft 21 ... Drive motor 27 ... Output shaft

Claims (1)

[Scope of utility model registration request] 1. A caster bracket 4 is fixed to the lower surface of an arc-shaped substrate 2 so as to face the traveling direction, and a rubber wheel 8 is provided.
The caster shaft 7 to which is fixed is rotatably provided on the caster bracket 4, and the universal joint 12 is provided at the inner end of both caster shafts 7.
A gear 16 fixed to one caster shaft 7 and a gear fixed to an output shaft 27 of a drive motor 21 mounted on the lower surface of the base plate 2 are connected to each other by a spline shaft 13 which slides in the axial direction and expands and contracts.
An electric in-pipe carriage that has a drive mechanism that meshes with 29.