JPS59361A - Apparatus for coating inner surface of metal pipe - Google Patents

Abstract

PURPOSE:To make it possible to automatically clean, suck and coat the inner wall of a gas pipe under an as-embedded state, by sending a mixture of sand and a paint to a rotation energizing mechanism receiving compressed air sent in a temp. adjusted state and attached to one end of a gas pipe. CONSTITUTION:Compressed air is introduced into the air rotary apparatus 15 of a rotation energizing mechanism 10 from an air temp. adjusting apparatus 88 through a main pipe 36 and branch pipes 37-40 by the start of an air generating apparatus 69 and rotary force is imparted to compressed air to send the same to a gas pipe 13. In the next step, when sand in a sand conditioning apparatus 24 is pneumatically supplied to the mechanism 10 through a pipe 16 by the operation of a valve, it receives rotary force to be advanced along the wall surface of the pipe 13 while collided with the inner wall thereof and rust on the inner wall of the pipe 13 is removed. The fallen substance in the pipe 13 is sucked by a dust collecting apparatus 83 to clean the pipe 13. In the next step, for example, the epoxy resin paint as a main agent and a curing agent in a paint storage apparatus 58 are sent to a mixing chamber 41 through a flexible pipe 42 by valve manipulation while mixed by compressed air to be sent to the mechanism 10 through a pipe 17. This paint mixture is advanced through the pipe 13 similarily as mentioned above and the inner wall 13 is uniformly coated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rust removal, cleaning, and painting device for the inner wall of metal pipes, especially buried fc@iron gas pipes, and is generally used to remove rust from the inner walls of buried fc@iron gas pipes. Made of cast iron, caliber 75 gourd ~
1,200 baits, but generally about 76 cm, standard length or about 1,001 IllI'c diameter, and supply pipes, ie, branch pipes, are connected to each consumer.

The gas that passes through the gas pipe, regardless of whether it is propane gas or city gas, usually contains a moisture content, so rust occurs due to water droplets adhering to the inner wall of the pipe, and pinholes are formed in the gas pipe, causing gas It would leak and cause a gas explosion, causing an unexpected loss of money.

Therefore, gas pipes are inspected periodically to check for gas leaks, and since they are buried underground, it is almost impossible to predict them accurately, so all buried pipes are replaced based on predictions. This is considered necessary for safety reasons.

However, it is said to be difficult to extract buried gas g even if the distance is 100 m due to road traffic conditions.

The technical problem of the present invention is to completely automatically remove rust from gas pipes while they are buried, and then remove rust and sand that has fallen into the pipes through a suction process installed at one end of the pipe. The purpose is to collect and clean the dust, and then apply the epoxy hardener evenly and evenly inside the pipe.

The structure of the present invention, that is, the technical means for solving the above technical problem is as follows.

A complete rotary biasing mechanism for pressurized air is installed at one end of the gas pipe, one pipe that is connected to the required part of the rotary biasing mechanism is connected to the supply side of the sand conditioning device, and the other pipe that is opposite to the pipe is connected to the supply side of the sand conditioning device. The pipe is connected to the tip of the mixing room),
One end of a compressed air pipe is attached to the end of the rotary urging mechanism, an air temperature adjustment device is connected to the other end of the compressed air pipe, and one end of a flexible pipe is connected to the rear end of the mixing room. Connect and other g! There is an inner surface coating device for metal pipes in which the RA is connected to the paint needle device and the RA is connected to the paint needle device.

Regarding the operation, the minimum number of experts required to work on the front and rear connections of the pipe that transports gas was dug, the inside of the pipe was inspected, the condition of the pipe's inner wall was investigated, and then the state was buried underground. Noma\
Since the inner wall of gas pipes can be automatically cleaned and painted using suction, there is no need to dig up roads, and the painting process can be completed in a short time, making it effective even in areas with poor traffic conditions. .

Preferred examples of embodiments of the present invention will be explained based on the drawings.

Reference numeral 10 indicates the entire rotary biasing mechanism having a generally trumpet-shaped cross section for supplying pressurized air.
The rear end 1 of the rotary biasing mechanism 10 is fitted into the threaded portion of one end of the gas pipe 13 through a joining ring 12 screwed to the rear end 1 of the rotational biasing mechanism 10.
An air rotary device 15 that applies rotational force to pressurized air is screwed and fixed to 4.

Furthermore, at least two first and second pipes 16 are connected to connecting pipes 18 and 19 that face each other at required locations of the rotational biasing mechanism 10.
．． The other end 22 of the first pipe 16 is connected to the connecting pipe 25 of the sand conditioning device 24, and the other end 23 of the second pipe 17 is connected to the tip opening of the air temperature mixing room 41. The part 26 is screwed into the part 26.

Pulp 27 and 28 are provided at both ends of the first pipe 160, that is, the front and rear ends 20 and 22, and a pulp 29 is provided at the front end of the second pipe 17.

The air rotary device 15 is a cylindrical body shown in FIG. 2, most of which is located inside the rotation urging mechanism 10, and has an end surface 30 exposed to the outside and a 45-hole inclined hole 3 in the inner cavity 31.
The test is held at regular intervals of 2 to 35 days.

Pipes 37 to 40 branched from the main pipe 36 are attached to the inclined holes 32 to 35, respectively, and the main pipe 36 is connected to a connecting pipe 43 of an air temperature adjustment device 88 having a cooling device using Freon gas. be done.

The mixing room 41 is generally box-shaped as shown in FIGS. 3 to 5, and its curved end is connected to the second pipe 17, and its rear end is connected to the tip of a flexible hose 42.

A through hole 48 is formed in the side wall 56 of the flexible hose 429111, and a rainbow compressed air guide passage 43.4 is formed in a semicircular partition wall 51.52 integral with partition walls 49.50 that partition the through hole 48 vertically and horizontally. ．4The left and right sides were filled with disgust.
The compressed air guide passages 43 and 44 are fitted with half-moon-shaped guide blades 45 and 46 whose diameters are gradually reduced in the axial direction of the rainbow box, and the tips s of flexible hoses 42 that protrude left and right with the partition wall 47 as boundaries. There is.

As shown in FIG. 5, the front end duct 53 of the mixing room 41 is twisted somewhat in the clockwise direction of the mixing room main body xD.

42 is a flexible hose, and the flexible hose 4
The rear end of 2 is connected to the open end of the paint storage device 61 via a lock ring 88, and the internal mechanism has a double-layer structure with the partition wall 49.50 and the semicircular partition wall 51.52 as described above. , left and right compressed air guide passages 43, 44, a base agent passage 54, and a base hardening agent passage 55 are formed on the left and right sides.

The storage room 60 is separated into left and right sides by a partition wall 66.

64 is a compressed air supply vibrator, which is connected to the paint storage device 58.
The lower part of the vibro 4 is cut off so as to flow into the gap 63, and the upper dome 65 is inserted upward into the inner box 62.

67 and 68 are fitted with the cap of the inner box 62.

69 is an air generating device such as a pressure m machine, and the generating device 69
Working sand adjustment device 24 Working air temperature adjusting device 88
The compressed air pipes 70, 71 and 72 and the main pipe 73 are connected to each other via valves 74, 15 and 76.

One end of the main pipe 73 is connected to the paint storage device 58 through a pipe joint 77.

78 is a cleaning liquid storage device, and this device 78 is connected to the pipe joint 77 through a pipe 79. 080 is an air pressure control duct, one end of which is connected to the air generator Ft69, and the duct 800 Branch pipes 81.81... are provided at required locations, and these branch pipes 81.81Q are connected to branch pipes 82.82... from the gas pipe 13.

Therefore, by blowing air into the gas pipe through the duct 80 and the branch pipe 81, it is possible to prevent the paint from forming a base material when painting the inner surface of the gas pipe 13.

Reference numeral 83 denotes a dust collecting device, which is attached to the open end side of the gas pipe 13 of the dust collecting port 84i of the device itt8B.

Describe the work process.

First, to start the air generator 69, the air (compressed air) is sent to the air rotary device 15 of the rotary energizing device SLO through the air temperature adjusting device 88, the main vibe 36, and the branch pipes 37 to 40. When the air rotary device [115] has inclined holes 32 to 35, arrows α b,
As shown in c and d, rotational force is applied and sent to the gas pipe 13.

Then, open the valve 27 and 28 of the first pipe 16,
Then, when the valve 74t on the 24 side of the sand adjustment device is opened, the sand is pushed out and supplied into the rotation urging mechanism IO through the first pipe 16Q.

The sand, which is urged by the rotational force of the air rotary device 15, collides with the entire inner wall of the gas pipe 13, ages along the wall surface, and peels off the rust on the inner wall of the pipe. Sand that has fallen onto the inner wall of the gas pipe 13 is sucked into the dust collector 83 and cleaned.

Next, the air pulp 74 of the sand conditioning device is closed to stop the flow of air.

Next, the valve 85.8ts at 58 is opened to the pigment storage device, and at the same time air is supplied to the second vibe 17 for sending out the paint.
When the valve 29 is opened, the main agent (for example, epoxy resin paint) is removed by air.
The guide blade 45 is extruded on the left side, and at the same time, the hardening agent is formed on the tip of the flexible pipe 42 on the right side.
The paint and curing agent are mixed into the mixing room 41 by the air flow passing through the outside of the mixing room 46 and then sent into the mixing room 41.

The material fed into the mixing room 41 passes through the second pipe 17 in this state and is fed into the transfer biasing mechanism 10 (b).

The paint fed into the rotary device 15 of the mechanism 10 is applied a rotational force to the rotating air of the rotary device 15, adheres to the inner wall of the gas pipe 13 and moves forward, and also flows toward the inlet side. The paint that accumulates and is distorted is pushed forward by the rotating air and reaches the end of the gas pipe 13, where the paint becomes uniform.

When the paint is completed, attach the valve 29ffi of the second pipe 17 for feeding the paint, and then paste the valve 29ffi of the second pipe 17 for feeding the paint.
Pulp 85.86 on the 3rd side is completely closed.

Next, the air temperature V @ conditioning device 88 -”/Rep 76'e
Close the air generator 69 and turn on the air generator 69.

As mentioned above, according to the device of the present invention, it is now possible to perform work by simply painting the inside of the gas pipe, which was conventionally considered impossible to do, or by digging work holes on both sides of the gas pipe.
Since it is possible to check whether there is rust in the pipe or whether the pipe is clean according to 7, it is possible to easily check the state of paint coating.

FIG. 12 shows another embodiment of the air rotary device, in which a partition plate 90 is attached to the inner surface of the cylindrical body 89 and is twisted approximately 180 degrees.
91 and 92 are arranged and fixed in multiple locations shifted by 90 degrees.

A rotational force is applied as shown by the arrow by using part of the torque of the own flow of the compressed air sent.

The main pipe 36 is directly attached to the cylindrical body 89.

In addition, compressed air is the only power source required to change the rotation speed of the sand for cleaning the inside of the pipe and the rotation of the paint. i Tsubaki Takatoku≠4 The auxiliary equipment is on the ground, and the compressed air feed pipe, the sand feed pipe, and the paint feed vibrator are connected to the air o-tally device in the rotational biasing mechanism. It is useful for reducing the work cost of the inner surface coating equipment for gold S pipes.

Next, after painting is completed, the gas pipe rotation biasing mechanism 10 is removed, and the flexible pipe 42 is removed from the paint storage device 1t58, and the rear end of the flexible pipe 42 is connected to the pipe joint 77, and the paint storage device * A key imp for preventing the paint from flowing out is fitted from 58.

Thereafter, when the cleaning liquid is supplied to the cleaning liquid storage device f[78], the flexible pipe, the mixing pipe, the second pipe and the rotary biasing mechanism 10P'3 are primarily cleaned.

L, 7'c has the advantage of eliminating any hindrance to the reuse of the device of the present invention.

[Brief explanation of the drawing]

Figure 1 is an overall explanatory diagram of the device of the present invention, and Figure 2 is the main part of the device of the present invention, fA of the air rotary device.
Al1 Fig. 3 is an overall view of the main mixing room of the gc unit of the present invention, Fig. 4 is a partial cross-sectional perspective view of Fig. 3, Fig. 5 is a right side view of Fig. 3, and Fig. 6 is a main part of the main mixing room. An overall view of the main part of the flexible TV hole of the invention device, Fig. 7 is a right side view of Fig. 6, and Fig. 8 is the same as Fig. 6.
Wr side perspective view, Figure 9 is an overall view of the main part of the paint storage device of the device of the present invention, Figure 1
0 is a right side view of FIG. 9, FIG. 11 is a -S@S perspective view of FIG. 9, and FIG. 12 is a sectional view showing another embodiment of the air rotary device of the present invention. 10: Rotation biasing mechanism 13: Gas pipe 15. 89: Air rotary device 24: Sand adjustment device 41: Air temperature mixing room 69: Air generation device 61 - paint storage device 89: Air temperature adjustment device Patent applicant Tai −Kogyo Co., Ltd.

Claims (1)

[Claims] (1) A rotary biasing mechanism for pressurized air is attached to one end of the gas pipe, and one pie 1 provided at a required location of the rotary biasing mechanism is connected to the supply side of the Sand H@ device. The other pipe that faces the pipe is connected to the tip of the mixing room, and one end of the compressed air pipe is attached to the end of the rotary biasing mechanism, and the compressed air/air volume is The inner surface coating of a metal pipe is characterized in that an air temperature adjustment device is connected to the other end of the pipe, one end of a flexible pipe is connected to the rear end of the mixing room, and the other end is connected to a paint storage device. Device (2) The inward coating device for metal pipes according to item 1, in which the air rotor 1j-device is screwed and fixed to the 9-rotation biasing mechanism. (3) The 0-rotation biasing mechanism The inner surface coating device for a metal tube according to claim 2g4, wherein a plurality of spiral grooves are formed with an inclination angle of approximately 45 degrees in the cylindrical body of the air rotary device screwed together. The inner surface coating device for a metal tube according to claim 2, wherein a plurality of partition plates are arranged with a phase difference of about 180 degrees on the cylindrical body of the air rotary device screwed into the mechanism. (5 ), the air temperature regulating device is equipped with a cooling device mainly using Freon gas gold refrigerant;