JPS5849826Y2 - Pipe internal cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for cleaning the inner surface of pipes, especially small diameter pipes.

Previously, the present applicant inserted an auxiliary rod into the pipe to be treated, and while the abrasive particles blown from one end of the pipe were diffusely reflected between the inner surface of the pipe and the auxiliary rod, the inner surface of the pipe to be treated was effectively cleaned. proposed a cleaning device.

However, it was found that turbulence occurred in the airflow at the outlet of the pipe, making it difficult to uniformly clean the inner surface of the pipe.

This invention is equipped with an auxiliary pipe on the outlet side of the pipe to be treated.
It is an object of the present invention to provide a cleaning device capable of uniformly cleaning the inner surface of a pipe by discharging the abrasive particles that have passed through the pipe to be treated from an auxiliary pipe.

The present invention will be specifically described below based on embodiments shown in the drawings.

FIG. 1 shows a situation in which a pipe 9 to be treated is placed horizontally on a support stand 1 of a cleaning device.

In this embodiment, the pipe 9 to be treated has a length of about 4 m and an inner diameter of 10 mm.

The support stand 1 has a plurality of horizontal stands 12 fixed in multiple rows and stages on leg plates 11, 11, and two rollers 14, 14 are arranged facing each other on each horizontal stand 12 as shown in FIG. ，
The pipe 9 to be treated is placed astride the pipe 14.

A parallel guide stand 15 is provided at one end of the support stand 1, and a moving frame 16 is supported between the guide stands.

The movable frame 16 has blocks 13 and 17 protruding from the bottom surface slidably fitted into the guide table 15, and one block 13 is connected to the reciprocating drive device 18, and the other block 17 is connected to the reciprocating drive device 18.
is connected to a moving piece 41 of a rotating device 4, which will be described later.

In the reciprocating drive device 18 of this embodiment, a chain 19 is stretched out in an endless manner below the guide table 15, a block 13 of a moving frame 16 is engaged with the chain 19, and one sprocket of the chain 19 is rotated. A brake motor 10 with a device is connected, and the movement of the motor 10 moves the moving frame 16 to the guide platform 1.
5 and approach and move away from the pipe 9 to be treated.

A pipe to be treated 9 and an abrasive particle injection pipe 2 are placed on the moving frame 16.
A connecting device 2 is provided for connecting 4.

The connecting device 2 connects the moving frame 1 on the extension line of the pipe 9 to be treated.
A first gripping tool 3 and a connecting cylinder 21 are freely rotatably arranged on both sides of the 6, and an abrasive particle injection pipe 24 is connected to the connecting cylinder 21.
A blowing auxiliary pipe 22 is provided protruding from the connecting tube 21, and the tip of the pipe is inserted into the first gripping tool 3.

As shown in FIG. 3, the first gripping tool 3 has a rubber sleeve 32 disposed inside a case 31 with openings at both ends, which is supported by a shaft on a moving frame 16, and an air chamber 31 formed between the case 31 and the rubber sleeve 32.
a Pressurized air is supplied to inflate the sleeve 32, and the outer circumferences of the auxiliary pipe 22 and the pipe to be treated 9 inserted through the sleeve 32 are airtightly clamped.

A sprocket 23 is attached to one end of the case 31, and the sprocket 23 is connected to the rotating device 4.

The rotation device 4 pivots a rotation shaft 42 parallel to the guide table 15 to the support table 1, connects the shaft 42 to a motor 43, and
A moving piece 41 is fitted onto the rotating shaft 42 by a sliding key 44 so as to rotate integrally with the shaft 42 and to be slidable in the axial direction.

The tip of the engagement plate 46 protruding from the block 17 of the moving frame 16 is slidably fitted into the circumferential groove 45 formed in the piece 41, and the sprocket 47 provided on the piece 41 and the sprocket of each first grip 3 are fitted. Connect 23 with Cheno 48.

A fixed frame 8 is placed on the opposite side of the movable frame 16 with respect to the pipe 9 to be treated.
A second gripping tool 3a similar to the first gripping tool 3 is provided on the fixed frame on the extension line of the pipe to be processed 9 and facing the pipe to be processed 9, and a movable support tool is provided on the other side of the fixed frame. 81 is mounted on a shaft so that the shaft can rotate freely.

The sprocket 23a of the second grip 3a is attached to the rotation shaft 42.
The first gripping tool 3 and the second gripping tool 3a rotate synchronously.

In the movable support 81, a piston tube 83 having a movement stroke of about IQ mm is fitted into a cylinder tube 82 rotatably attached to the fixed frame 8.

One end of the inner hole of the piston cylinder 83 forms a threaded surface 84, and the other end forms a tapered surface 85. The piston cylinder 83 has a tapered surface 86 at its distal end, a threaded part 87 at its proximal end, and has a threaded surface 84 at its other end. A tightening tube 89 with a groove 88 is screwed together.

Pressure air is sent to the cylinder cylinder 82, and the piston cylinder 83
is urged toward the treated pipe 9 side.

A blowout auxiliary pipe 80 having a length of about 1 m is inserted into the tightening tube 89, and the tightening tube 89 is tightened and fixed to the piston tube 83, and one end of the blowout auxiliary pipe 80 is attached to the second gripping tool 3a.
The other end of the abrasive particles is brought out into the abrasive particle take-out casing 5 adjacent to the fixed frame 8.

The collection case 5 is a sealed case in which a collection chamber 50 for abrasive particles is formed, and an exhaust pipe 51 that communicates with a dust collector (not shown) protrudes from the top plate, and an abrasive particle collection chamber 50 is formed at the bottom of the case. Body removal port 52
is provided.

A support frame 6 is provided on the opposite side of the recovery case 5 from the fixed frame 8, and a connecting pipe 61 protruding from the side wall of the recovery case 5 is connected to the recovery case 5 and the support frame 6 on the extension of the pipe 9 to be treated. Connect.

The side wall 62 of the support frame 6 leading to the connecting pipe 61 has the first,
A third gripper 3b having the same structure as the second gripper 3, 3a is mounted on a shaft, and each third gripper 3b rotates in a direction opposite to that of the first and second grippers 3, 3a connected to a motor 63. do.

The support frame 6 is further provided with a feeding device 60 for the auxiliary rod 91.

The feed roll 64 provided in the feed device 60 has a V groove 66 on the outer periphery.
is recessed.

The depth and width of the V-groove 66 are set so that the auxiliary rod 91 fitted in the groove is located on the extension of the pipe 9 to be treated.
A horizontal shaft 68 fitted with a feed roll 64 is connected to one end of a reversible motor 67 with a speed reducer.

Above the feed roll 64, move the L-shaped lever 63 to the shaft 69.
Pivot to.

A presser roll 54 is attached to the tip of the horizontal arm plate 54 of the lever 63.
is attached to rotate freely, and a piston rod 58 of a cylinder device 57 is connected to the tip of the upward arm plate 55.

A supporting stand 7 of an auxiliary rod 91 is continuously arranged outside the feeding device 60, and the supporting stand 7 fixes a sliding stand 71 onto a leg plate 72 along an extension line of the pipe 9 to be processed. , place the auxiliary rod 91 on the climbing platform 71.

The auxiliary rod is formed by inserting piano wire into the tube or shaft made of a flexible material with excellent abrasion resistance such as urethane resin, and its outer diameter is 10 mm when the inner diameter of the pipe 9 to be treated is 10 mm. is about 5 mm, and the auxiliary rod 91 and the pipe to be treated 9
A fluid passage 92 is formed between the inner surface of the tube and the inner surface of the tube.

However, prior to the cleaning work, the auxiliary rod 91 is passed between the two rolls 64, 55, penetrates the collection case 5, and the tip of the auxiliary rod 91 is exposed to the blowout auxiliary pipe 80, and the moving frame 16 is moved back. I'll keep it.

After placing the pipe 9 to be treated on the support stand 1, the reciprocating drive device 1
8, the moving frame 16 is advanced toward the pipe to be treated 9.

Since the first gripping tool 3 of the moving frame 16 and the pipe to be processed 9 are located on the same straight line, the tip of the pipe to be processed 9 enters the first gripping tool 3 while the moving frame 16 is moving. The tip of the pipe 9 hits the tip of the auxiliary blowing pipe 22 and is pushed, and the pipe 9 to be treated also moves toward the fixed frame 8.

The other end of the pipe to be treated 9 enters the second gripping tool 3a provided on the fixed frame 8, hits the blowing auxiliary pipe 80, and pushes the pipe 80.

The other end of the blow-off auxiliary pipe 80 is supported by a movable support 81 that has a cushioning effect using air pressure, and cushions the shock when the pipe collides.

When the end faces of the three pulps 22, 9.80 come into contact, the reciprocating drive device 18 is stopped, and then the motor 67 of the feeding device 60 is turned off.
and actuate the cylinder device 69 and roll 64.55
The auxiliary rod 91 is fed out while being clamped, penetrates the blowing auxiliary pipe 80 and the pipe to be treated 9, and the tip of the auxiliary rod 91 enters the blowing auxiliary pipe 22.

Next, the piston rod 58 of the cylinder device 57 is pulled to lift the presser roll 55 and stop the rotation of the feed roll 64.

Send pressurized air to the three gripping tools 3, 3a, 3b,
Inflate the rubber sleeve 32 inward, grip the outer peripheries of the ends of the pipe to be treated 9 and both auxiliary pipes 22 and 80 that are in contact with the pipe with the first and second gripping tools 3 and 3a, and The auxiliary rod 91 is held airtight with the gripping tool 3b.

Therefore, both ends of the processing pipe 9 communicate with the injection pipe 24 and the recovery case 5.

While maintaining the above state, each gripping tool 3, 3a, 3b
When the abrasive grains are placed on pressurized air and injected at high speed from the injection pipes 24 while rotating, the grains are distributed at each pipe 24°9.8
0 and the auxiliary rod 91 while being diffusely reflected on the inner surface of the pipe and the outer surface of the auxiliary rod.
It is recovered to 0.

The present invention has an auxiliary pipe 8 that blows out to the outlet side of the pipe 9 to be treated.
0 continuously, the abrasive grains pass through the pipe 9 to be treated at a substantially constant flow velocity, and the flow velocity increases near the collection chamber 50, but turbulence in the flow occurs only in the auxiliary pipe 80, and the The inner surface of the processing pipe 9 is uniformly polished.

By communicating the auxiliary blowing pipe 22 to the blowing side of the pipe 9 to be treated, the abrasive grains have already run through the auxiliary blowing pipe before reaching the pipe 9 to be treated, and in this state, the abrasive particles are Since it flows into the processing pipe 9, more uniform cleaning can be achieved.

Furthermore, the pipe to be treated 9 is held by the first gripping tool 3 and the second gripping tool 3a.
, and rotates the auxiliary rod 91 with the third gripping tool 3b in the opposite direction to the rotation direction of the pipe 9 to be treated.
Even if the auxiliary rod 91 comes into contact with the inner surface of the pipe 9 to be treated that is drooping due to force control, the auxiliary rod 91 does not follow the rotation of the pipe 9 to be treated, and the contact point of the auxiliary rod 91 to the pipe 9 constantly moves, so that no abrasive spots occur. Does not occur.

After the abrasive particles are injected for a predetermined period of time (approximately 10 seconds in this example), the blowing of the abrasive particles is stopped, and only pressurized air is sent from the abrasive particle injection pipe 24 so that the abrasive particles remain in the pipe 9 to be treated. The abrasive granules are blown out into the collection casing 5.

Next, the pressure air from the three gripping tools 3.3a and 3b is released, and the clamps on the pipe 9 to be treated and the auxiliary rod 8 are released.

The cylinder device 57 of the feed device 60 is operated to again clamp the auxiliary rod 91 between the presser roll 55 and the feed roll 64, and the motor 67 is reversed to extract the auxiliary rod 91 from the pipe to be processed 9, and at the same time, the reciprocating drive device 18 is activated. Move frame 1
6 is moved backward, and the polished pipe 9 is removed from the support base 1.

By repeating the above operations, the pipe 9 can be efficiently cleaned.

As described above, in the present invention, the blowing auxiliary pipe 80 is provided on the blowing side of the pipe to be treated 9 and communicates with the pipe.
The abrasive particles increase the flow velocity on the exit side of the auxiliary pipe 80, but pass through the pipe 9 to be treated at a substantially constant speed, and have an excellent effect of uniformly cleaning the inner surface of the pipe 9 to be treated.

[Brief explanation of the drawing]

Figure 1 is a front view of the polishing device, Figure 2 is a sectional view taken along line III in Figure 1, Figure 3 is a sectional view of the first and second grips and movable support, and Figure 4 is the third FIG. 3 is a cross-sectional view of the gripper and feeder. 1... Support stand, 3, 3 a, 3 b...
...Gripper, 4...Rotating device, 80...
・Auxiliary pipe, 91...Auxiliary rod.

Claims (1)

[Scope of utility model registration request] A support stand 1 that horizontally supports the pipe 9 to be processed; and a first grip 3 that is arranged so as to be horizontally movable and rotatable so as to face one end of the pipe 9 on the support stand 1 and that clamps one end of the pipe 9 to be processed. , an abrasive particle injection pipe 24 that communicates with the gripper 3 and sends the abrasive particles into the pipe to be treated, and an abrasive particle injection pipe 24 that is disposed at the other end of the support base 1 and has a particle collection chamber 50 therein to be treated. a recovery chamber 5 equipped with a blowout auxiliary pipe 80 facing the other end of the processing pipe 9; a second gripper 3a that is rotatably disposed at the tip of the blowout auxiliary pipe 80 and clamps the other end of the to-be-processed pipe 9; ,
An auxiliary rod 91 that penetrates the collection box 5, the blowout auxiliary pipe 80, and the second gripping tool 3a and retracts into the pipe to be treated;
A pipe inner surface polishing device comprising a rotating device 4 connected to the first and second gripping tools 3 and 3a.