JPS61271079A - Cleaner for cylindrical inner surface - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cleaning machine for cleaning a cylindrical inner surface, such as the inner surface of a heat exchanger shell.

[Prior art]

For example, cylindrical inner surfaces such as the inner surfaces of heat exchanger shells in chemical factories are subject to deposits, dirt, rust, and cracks due to deterioration caused by fluid over time. Its cleaning is required to restore its original function.

Conventionally, cleaning was performed by spraying high-pressure fluid onto the cylindrical inner surface using a high-pressure jet flow generating device.

Alternatively, a worker enters the cylindrical inner surface and cleans it using a hand-held cleaning tool.

[Problem that the invention seeks to solve]

Cleaning using a high-pressure jet flow generator not only requires a large-scale high-pressure jet flow generator, but also requires the operator to manually operate the jet nozzle in close proximity to the cylindrical inner surface to be cleaned. There were problems with work safety and hygiene. Furthermore, processing of the fluid after cleaning was also time-consuming.

It is not only impossible for workers to clean inside the cylindrical inner surface of small-diameter pipes, but it is also inefficient, resulting in inconsistent cleaning results, and furthermore, in a toxic atmosphere, it is necessary to take measures against toxic gases. Since the work involved wearing protective equipment, there were safety and hygiene issues.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dedicated cleaning machine that is small in size, can be cleaned safely and reliably, and is also capable of handling objects with cylindrical inner surfaces having different diameters.

[Means for solving problems]

A cleaning machine according to the present invention includes a base, a leg for moving the base, a leg length variable means for varying the leg length of the leg, a rotating shaft attached to the base by a bearing, and a rotating shaft attached to the base. a first driving means for rotating the rotary shaft by rotating the rotary shaft; an arm provided at the tip of the rotary shaft so that the axis direction is substantially orthogonal to the rotary shaft; and an arm length variable means for varying the length of the arm. , a cleaning tool provided at the tip of the arm so as to be rotatable in the axial direction of the arm, a second drive means for rotating the cleaning tool, and a remote control for operating the first and second drive means. It consists of an operation section.

[Effect]

The leg length variable means adjusts the leg length, and the arm length variable means simultaneously adjusts the arm length, so that the leg length and arm length are adapted to the diameter of the cylindrical inner surface to be cleaned. That is, the rotation axis for rotating the arm is adjusted so that it is aligned with the axis of the cylindrical inner surface. In this state, the remote control unit is operated to rotate the rotating shaft by the first driving means, thereby rotating the arm in the circumferential direction of the cylindrical inner surface. Furthermore, at the same time, the cleaning tool is rotated by the second driving means. The cleaning machine is moved along the entire length of the cylindrical inner surface to clean the cylindrical inner surface.

〔Example〕

FIG. 1 is a perspective view of a cleaning machine according to the present invention, FIG. 2 is a vertical side view, FIG. 3 is a front view, and FIG. 4 is a perspective view of a mobile cart equipped with a remote control unit. A base 1 made of a rectangular flat plate has four legs 2, 2.・・・・・・
... is provided. The legs 2.degree.2, . Moreover, the legs 2, 2 .・・・・・・
・The leg length is variable.

The leg length variable means 10 includes legs 2, 2 . A male thread 3 is carved on the outer surface of the leg 2, and a female thread (not shown) is carved inside the cylinder 5 of the screw jack 4 fixed to the side surface of the base 1. 2. The male thread 3 of... is connected to the cylindrical body 5.
It is constructed by screwing it into the inside. Reference numeral 6 indicates a handle, and the handle 6 is used to operate the screw jack 4. The front and rear screws 4, 4 are connected by a connecting shaft 7. Thereby, by operating the handle 6, the front and rear screw jacks 4, 4 can be operated simultaneously, and the leg lengths of the front and rear legs 2, 2 can be changed and adjusted at the same time. The legs 2, 2. . . . Wheels 8, 8.
... are provided, and the base 1 is moved by the wheels 8, 8....

A rotating shaft 11 is attached to the upper surface of the base 1 along the longitudinal direction by a bearing 12 fixed to the base 1.
A first drive means 13 for rotating the rotating shaft 11 is attached to the lower surface of the base 1. By providing the first driving means 13, which has a large weight, on the lower surface of the base 1, the base 1 is stabilized together with the above-mentioned open leg structure. A sprocket 15 is fixedly attached to a rotating drive shaft 14 of the first drive means 13, and a chain 17 is stretched between the sprocket 15 and a tin rocket 16 fixedly attached to a corresponding position of the rotating shaft 11, thereby causing the first drive shaft 14 to rotate. The power of the means 13 is the rotating shaft 1
1. Reference numeral 18 denotes a hole bored in the base, through which the chain 17 is passed.

An arm 19 is provided at the tip of the rotating shaft 11 so that the axis direction is orthogonal to the rotating shaft 11 . The arm 19 is formed to have a variable arm length. The arm length variable means 20 has a long plate-like arm 19 having two longitudinally parallel elongated holes 21 and 21 (FIG. 3), and is fixed to the tip of the rotating shaft 11. It is constructed by fastening the arm 19 to a rectangular flange 22 through its long holes 21, 21 with bolts and nuts 23. That is, loosen the bolts and nuts 23 to move the arm 19 in the longitudinal direction along the long holes 21, 21, and when the desired arm length is reached, tighten the bolts and nuts 23 again to change the arm length. .

A cleaning tool 24 is provided at the tip of the arm 19. The cleaning tool 24 is attached to a box 25 fixed to the tip of the arm 19 so as to be rotatable about the axial direction of the arm 19. A second driving means for rotating the cleaning tool 24 is disposed inside the arm 19, that is, the box 25. The rotatable structure of the cleaning tool 24 and the structure of the second driving means will be specifically explained based on FIG. 5. The cleaning tool 24 is screwed onto the tip of a main shaft 26, and the main shaft 26 has bearings 28, 28, . It is formed so that it can rotate on its own axis by being held through... The base end of the main shaft 260 is formed as a long spline shaft 29. This spline shaft 29 is inserted into the rotating body 30, and the rotating body 30
and long grooves 31, 31. They are formed so that they can rotate together through them and can slide and move relative to each other in the axial direction. The rotating body 30 is mounted in a holder 32 fixed to the arm 19 with bearings 33, 33 . It is rotatably held via... The base end of the rotating body 30 extends to the outside of the holder 32, and a gear 34 is fixed to the extended portion.

On the other hand, a second driving means 35 is fixed to the arm 19. A gear 37 is attached to the rotating drive shaft 36 of the second drive means 35.
is fixedly installed, and the gear 37 meshes with the gear 34. As a result, the power of the second drive means is transferred to both gears 37, 34. The cleaning tool 24 is configured to rotate by being transmitted to the main shaft 26 via the rotating body 30 and the spline shaft 29.

The first drive means 13 and the second drive means 35 are configured to be remotely controllable by a remote control section 38 (FIG. 4). 39.40 indicates a conduction line, and the conduction line 39.
Reference numeral 40 connects the remote control section 38 and each drive means 13.35. In this embodiment, both the first and second drive means 13.35 are formed by air motors. If the interior of the cylindrical surface to be cleaned is in a flammable atmosphere, there is a problem in that it is difficult to use an electric motor due to safety concerns, but this problem can be solved by using an air motor. Due to the use of an air motor, the conduction lines 39, 40 are formed by air hoses. In FIG. 4, 41 and 42 each indicate an air flow rate adjusting section, and 43 indicates a conduction line with an air supply device (not shown).

The first drive means (air motor) 13 is fixed to the lower surface of the base 1 and is directly connected to the conduction line (air hose) 40, but the second drive means (air motor) 35 rotates. Since it is provided on the arm 19, it cannot be directly connected to the conduction line (air hose) 39.

In this embodiment, a hollow portion 41 (FIG. 2) is formed over substantially the entire length inside the rotating shaft 11, and a rotary joint 42 is provided at the base end of the rotating shaft 110 and communicates with the hollow portion 41.
The tip of the conduction line (air hose) 39 is communicated with the rotary joint 42, and an air outlet 43t protruding from the side surface near the tip of the rotary shaft 11 is provided to communicate with the hollow part. 43 and the second drive means (air motor) 35 are communicated through an air hose 44. This makes it possible to supply air as a power source to the second drive means (air motor) 35 that rotates together with the arm 19.

In this embodiment, the cleaning tool 24 is further configured to be able to reciprocate within a certain stroke in the axial direction of the arm 19. This is done in consideration of the fact that the diameter of the cylindrical inner surface to be cleaned is not uniform.

This reciprocally movable structure will be explained based on FIG. Rollers 46, 46. It is constructed by holding the data through... 47 indicates a spacer. A cylindrical spring receiver 48 is integrally provided at the lower end of the holder 27, and a coil spring 50 is compressed between the lower surface of the holder 45 and a spring seat 49 of the spring receiver 48.

The coil spring 50 functions as a cushion against the reciprocating movement of the cleaning tool 24, and is compressed when the arm 19 rotates to resist the centrifugal force caused by the weight of the cleaning tool 24. It is configured so that it can easily follow changes in the diameter of the cylindrical inner surface to be cleaned.

The spring receiver 48 is screwed together with the holder 27 via a threaded portion 51, and is formed so that the spring force of the coil spring 50 can be varied by screwing the spring receiver 48 in the axial direction. There is.

The stroke, that is, the reciprocating range of the cleaning tool 24 is determined by the lower limit being the position where the spring seat 49 contacts the upper surface of the holder 32 and the upper limit being the position where the coil spring 50 is completely compressed. .

Further, in this embodiment, an air cylinder device 52 is fixed to the arm 19, and the air cylinder device 52 is configured to apply a constant outward force to the cleaning tool 24 in the forward direction. This is because the cleaning tool 24 reciprocates in the axial direction of the arm 19 in response to the irregularities in the diameter of the cylindrical inner surface to be cleaned.
This is to prevent the contact pressure to the cylindrical inner surface of No. 4 from changing. Therefore, the air cylinder device 52 has a pressure reducing valve 53, which is configured to automatically maintain a constant contact pressure according to the initial setting pressure. The air cylinder device 52 connects the air outlet 43 of the rotating shaft 11 with an air hose 54.
It communicates with another air outlet 55 protruding from the opposite side.

A connection structure for the air cylinder device 52 to apply a constant forward force to the cleaning tool 24 will be explained. A first rack 56 is formed in the reciprocating direction on the outer surface of a holder 27 that rotatably holds the cleaning tool 24 and reciprocates together with the cleaning tool 24. A second rank 58 parallel to the rack 56 is provided, and the side rack 56 is supported by a freely rotating gear 59 which is pivoted between the racks 56 and 58 of the arm 19.
．． 58 are formed to interlock with each other. That is, since the second rack 58 reciprocates together with the protrusion and retraction of the piston rod 57, this reciprocating movement is transmitted through the gear 59 to the first rack 58.
This is transmitted to the rack 56, thereby causing the holder 27 to reciprocate. Therefore, the pressure reducing valve 53 is connected to the air cylinder device 52.
If the initial setting pressure is set by A certain amount of focus will be added. This eliminates uneven cleaning. In FIG. 5, 60 is a cylinder, 61
indicates the guide body of the second rank 58. However, if the stroke of the piston rod 57 is set smaller than the stroke caused by the spring seat 49, the zero stroke of the piston rod 57 becomes the reciprocating range of the cleaning tool 24.

By the way, when the arm 19 rotates at high speed in a vertical plane, if the cleaning tool 24 is formed to be able to reciprocate within a certain stroke in the axial direction of the arm 19, when the arm 19 rotates,
When the cleaning tool 24 is located at the top, the direction of its own weight and the direction of the focus are opposite, while when the cleaning tool 24 is located at the bottom, the direction of its own weight and the direction of the focus are opposite. Therefore, even if the air cylinder device 52 having the pressure reducing valve 53 is set to apply a constant force, there is a problem that the force cannot be kept constant due to the influence of its own weight. In order to solve this problem, this embodiment is configured as follows.

As described above, the air cylinder device 52 and the cleaning tool 24 are formed so as to be interlocked with each other by the racks 56, 58 and the gear 59. Then, the cleaning tool 24 is applied to the gear 59.
All reciprocating members on the side (cleaning tool 24, holder 27, bearing 28, spring receiver 48, main shaft 26, and spline shaft 29)
) and its sliding parts (holding body 27 and roller 46
．． The total sum A of the static frictional force of the spline shaft 29 and the rotating body 30), all the reciprocating members on the air cylinder device 52 side (the piston (not shown), the piston rod 57, the second rank 58), and the sliding motion thereof. part (piston and cylinder 60, second
The total sum B of the static friction forces of the rack 58 and the guide 61) was set to be approximately equal. To explain the effects of this configuration, the directions in which both sums A and B work are the same, and when the cleaning tool 24 is located at the top, they both work in the opposite direction to the focus, and when it is located at the bottom, they work in the opposite direction. Both work in the same direction as focus. Since the magnitudes of the forces of both sums A and B are approximately equal, the sums A and B are paralleled via the gear 59,
cancel each other out. Therefore, even if the direction of the dead weight of the cleaning tool 24 is in the same direction as the focused focus or in the opposite direction, the dead weight of the cleaning tool 24 is canceled out as described above, and the dead weight has no effect on the focused focus. Therefore, whether the cleaning tool 24 is at the highest position or at the lowest position, the contact pressure to the cylindrical inner surface is reduced by the air cylinder device 5.
2 and the coil spring 50, a preset constant value is always maintained.

The movable cart 62 shown in FIG. 4 will be explained.

As described above, the movable trolley 62 is equipped with the remote control section 38 and is configured to be able to place and hold the cleaning machine thereon. Recesses 63, 63. . . . are the wheels 8, 8 of the cleaning machine. It is something that fixes... At the front end of the movable cart 62 are mounting bolts 65, 65. for mounting the centering gauge 64. ...... is provided. The centering gauge 64 has a size that matches the diameter of the cylindrical inner surface to be cleaned, and by using the gauge 64, the cleaning machine can be placed on the moving cart 62 while the legs 2
,2. The leg length of ... and the arm length of arm 19 can be adjusted.

Next, the operation of the above embodiment will be explained. First, the mobile trolley 62
Using the centering gauge 64, the legs 2, 2[deg.] and the arm length of the arm 19 are adjusted according to the diameter of the cylindrical inner surface to be cleaned. Next, the cleaner is brought into the cylindrical inner surface, and the air flow rate adjustment parts 41, 42 of the remote control part 38 are operated to operate the first drive means 13 and the second drive means 35.

This causes the rotating shaft 11 to rotate, and thus the arm 19 to rotate. Further, the cleaning tool 24 rotates about the axis of the arm 19. In this state, if the cleaner is moved over the entire length of the cylindrical inner surface using a long push rod or a separate driving means, the cleaning tool 24 will rotate in the circumferential direction along the cylindrical inner surface and further rotate, thereby causing the cleaning tool 24 to move around the cylindrical surface. The inside surface is cleaned.

Even if the cylindrical inner surface has irregularities and the diameter is not uniform, the cleaning tool 24 can reciprocate within a certain stroke and can follow the irregularities.

Since a constant forward force is applied to the cleaning tool 24 by the air cylinder device 52 having the pressure reducing valve 53, even if the cleaning tool 24 reciprocates following the unevenness, it will not come into contact with the cylindrical inner surface of the cleaning tool 24. The pressure is maintained at a preset constant value.

Furthermore, the influence of the dead weight of the cleaning tool 24 on the forward force is determined by the total dead weight of all the reciprocating members on the cleaning tool 24 side with respect to the gear 59, the sum A of the frictional force of the sliding part, and the air cylinder device. Since the corresponding sum B on the cleaning tool 24 side is set approximately equal to cancel each other out, the cleaning tool 24
Whether it is in the highest position or the lowest position, its own weight has no effect.

Similarly, when cleaning weld lines etc. on the cylindrical inner surface, the second
Activate only the drive means 35 to rotate the cleaning A24,
It is possible to move the cleaning machine in this state.

〔Effect of the invention〕

According to the present invention, the cleaning tool cleans the cylindrical inner surface while rotating in the circumferential direction along the cylindrical inner surface and further rotating around the axial direction, that is, by a combination of two different rotations. Because of the cleaning, dirt can be reliably removed, and therefore the cleaning work can be completed in a short time. Furthermore, since the leg length and arm length are variable, it is possible to easily clean cylindrical inner surfaces of different diameters with one cleaning machine.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a cleaning machine according to the present invention, Fig. 2 is a longitudinal side view, Fig. 3 is a front view, Fig. 4 is a perspective view of a mobile cart equipped with a remote control unit, and Fig. 5 is an arm. An enlarged sectional view of the main part of the tip part is shown. DESCRIPTION OF SYMBOLS 1... Base, 2... Leg, 10... Leg length variable means, 11... Rotating shaft, 12... Bearing, 13...
- First drive means, 19... Arm, 20... Arm length variable means, 24... Cleaning tool, 35... Second drive means, 38... Remote control section.

Claims (6)

[Claims] (1) A base, a leg for moving the base, a leg length variable means for varying the leg length of the leg, a rotating shaft attached to the base by a bearing, and a rotating shaft attached to the base for adjusting the length of the leg. a first driving means for rotating a rotating shaft; an arm provided at the tip of the rotating shaft so that the axis direction is substantially orthogonal to the rotating shaft; an arm length variable means for varying the arm length; and the arm. a cleaning tool provided at the tip of the arm so as to be rotatable around the axial direction of the arm; a second drive means provided on the arm for rotating the cleaning tool; and actuating the first and second drive means. A cylindrical inner surface cleaning machine consisting of a remote control part. (2) Claim 1, characterized in that the first driving means and the second driving means are formed by air motors.
Cleaning machine for cylindrical inner surface as described in Section 1. (3) A hollow part is formed in substantially the entire length of the inside of the rotating shaft, a rotary joint is provided at the base end of the rotating shaft that communicates with the hollow part, and the base end of the rotary joint is communicated with the remote control unit. The air hose is connected to the tip of the air hose, and an air outlet that communicates with the hollow part is provided on the side surface near the tip of the rotating shaft, and the air outlet and the second driving means are communicated by the air hose. A cleaning machine for a cylindrical inner surface according to claim 2. (4) The cylindrical inner surface according to claim 1, 2, or 3, wherein the cleaning tool is formed to be capable of reciprocating within a certain stroke in the axial direction of the arm. cleaning machine. (5) A cylinder according to claim 4, wherein a constant outward force is applied to the cleaning tool in the forward direction by an air cylinder device provided on the arm and having a pressure reducing valve. A cleaning machine for the inside surface. (6) A first rack is formed in the reciprocating direction on the outer surface of a holder that rotatably holds the cleaning tool and reciprocates together with the cleaning tool;
A second rack parallel to the rack is provided, and the two racks are formed to be interlocked by a freely rotating gear that is pivotally supported at a position between the two racks of the arm, and the entire cleaning tool side is connected to the gear. The total weight of all reciprocating members and the frictional force of their sliding parts was set to be approximately equal to the sum of the total weight of all reciprocating members on the air cylinder device side and the frictional force of their sliding parts. A cleaning machine for a cylindrical inner surface according to claim 5, characterized in that: