JP2015081756A - Tube bundle washing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube bundle washing equipment capable of washing the entirety of a tube bundle sufficiently even if the tube bundle has a different external diameter.SOLUTION: A tube 9 is positioned on one longitudinal end side of a tube bundle 1, and a nozzle 13 is positioned just above the tube bundle 1. While injecting high pressure water from the nozzle 13, the base 9 is moved in an X-axis direction along a longitudinal guide rail 4. After this, a sub base 15 is shifted by one pitch in a Y-axis direction, and a rod 10 is vertically moved in a Z-axis direction thereby to adjust the interval between the nozzle 13 and the tube bundle 1, and the base 9 is moved to be washed. By subsequently repeating that washing operation, the tube bundle 1 is sufficiently washed in its entirety.

Description

  The present invention relates to a tube bundle cleaning device that cleans a tube bundle removed from a heat exchanger by jetting high-pressure water from a nozzle.

  The tube bundle of the heat exchanger is configured as a structure in which a large number of tube assemblies are arranged in a substantially cylindrical shape.

  A tube bundle, which is an assembly of a large number of tubes, needs to be cleaned regularly to remove dirt because many stains adhere to the outer peripheral surface of each tube with use and impair its function.

  As a device for cleaning a tube bundle removed from a heat exchanger, Japanese Patent Laid-Open No. 8-110194 (Patent Document 1) has a nozzle on a frame body that is installed so as to straddle the tube bundle and is movable in the tube bundle longitudinal direction. It describes what is installed and moves the frame while jetting high-pressure water from the nozzle. In Patent Document 1, a C-shaped rail surrounding the tube bundle is installed inside the frame body, and a sliding body is installed so as to move along the C-shaped rail. A casing is extended from the sliding body, and a nozzle is attached to the tip of the casing.

  Japanese Patent Application Laid-Open No. 2013-29232 (Patent Document 2) discloses a guide rail that is disposed above a tube bundle and extends in the tube bundle longitudinal direction, an arm support that can move along the guide rail, and the arm support. A first arm extending obliquely downward from the body to one side of the tube bundle, a second arm extending obliquely downward to the other side of the tube bundle, and moving along the first arm And a second base movable along the second arm, and a tube bundle having a high-pressure water jet cleaning nozzle attached to each of the first and second bases A cleaning device is described.

JP-A-8-110194 JP2013-29232A

  In the tube bundle cleaning device of Patent Document 1 described above, since the C-shaped rail is installed so as to surround the tube bundle, the tube bundle is cleaned when the outer diameter of the tube bundle is larger than the diameter of the C-shaped rail. I can't.

  In the tube bundle cleaning device of Patent Document 2, when the base is positioned on the lower end side or the upper end side of the arm, a large (maximum radial length of the tube bundle) is provided between the nozzle attached to the base and the tube bundle. Therefore, there is a possibility that the spraying water from the nozzle spreads and the cleaning efficiency of the tube bundle is lowered.

  An object of this invention is to provide the tube bundle washing | cleaning apparatus which can wash | clean the whole tube bundle uniformly enough even if it is a tube bundle from which an outer diameter differs.

  The tube bundle cleaning device of the present invention is a tube bundle cleaning device for cleaning water by jetting water from a nozzle to the tube bundle, and is arranged above the tube bundle and extending in the tube bundle longitudinal direction, A base movable along the longitudinal guide rail, first driving means for causing the base to travel along the longitudinal guide rail, and provided on the base, intersecting the tube bundle longitudinal direction A sub-base movable in the horizontal direction, a second drive means for moving the sub-base, a vertical moving body supported by the sub base so as to be movable in the vertical direction, and moving the vertical moving body up and down And a nozzle provided at the lower part of the up-and-down moving body.

  In one aspect of the present invention, the nozzle includes a base tube portion that extends in a vertical vertical direction, and a nozzle portion that bifurcates from the base tube portion and injects high-pressure water vertically downward, It is rotationally driven around the axis of the base tube.

  In this invention, it is preferable to provide the control means which controls so that the said nozzle may move to a tube bundle longitudinal direction in the state located in the predetermined distance just above the said tube bundle.

  According to the tube bundle cleaning device of the present invention, since the nozzle can be moved in the three directions of the tube bundle longitudinal direction, the horizontal direction intersecting with the tube bundle, and the vertical vertical direction, the nozzle is always positioned upward by a predetermined distance of the tube bundle. Then, the tube bundle can be washed by spraying high pressure water. As a result, the entire tube bundle can be thoroughly cleaned.

  In the present invention, it is preferable that the nozzle includes a base pipe portion extending in the vertical vertical direction and a nozzle portion that bifurcates from the base pipe portion and jets high-pressure water downward in the vertical direction. By rotating the nozzle about the axis of the base tube portion, high-pressure water can be uniformly sprayed between the tubes even for tube bundles having different tube pitches.

It is a perspective view of the tube bundle washing | cleaning apparatus which concerns on embodiment. It is a perspective view of a base. It is a front view of a tire drive mechanism.

  Hereinafter, embodiments will be described with reference to FIGS.

  The tube bundle 1 has a large number of tubes (fine tubes) arranged in parallel to form a columnar shape as a whole, and a predetermined gap is provided between the tubes.

  The tube bundle 1 is arranged horizontally on the ground surface via sleepers 2 and the like.

  As shown in FIG. 1, the frame 3 is disposed so as to straddle the tube bundle 1. The frame 3 includes a pair of horizontal longitudinal guide rails 4, 4 extending in the longitudinal direction of the tube bundle 1, tie frames 5, 5 connecting both ends of the longitudinal guide rails 4, 4, and each longitudinal guide rail 4, a post 6 that supports both ends of the frame 4, a lower frame 7 that supports the posts 6, 6, a cleaning device moving tire 8 provided on the lower frame 7, and the length of the tube bundle 1 along the short guide rail 4. A base 9 that is movable in the direction, a rod 10 as a vertically movable body supported so as to be vertically movable relative to the base 9 in the vertical vertical direction (Z-axis direction), and a support bracket 11 at the lower end of the rod 10 The nozzle support box 12 provided and the nozzle 13 supported by the nozzle support box 12 are provided.

  As shown in FIG. 2, the base 9 is a pair of short guide rails 14 and 14 extending in a direction orthogonal to the long guide rails 4 and 4, and is constructed between the short guide rails 14 and 14. A sub-base 15 that is movable in the Y-axis direction along the rails 14, 14, a Z-axis driving air motor 17 and a ball provided on a horizontal plate 16 of the sub-base 15 for raising and lowering the rod 10 A rod guide mechanism such as a screw mechanism or a rack and pinion mechanism, and a Y-axis driving air motor 18 for moving the sub-base 15 in the Y-axis direction are included. The X axis is an axis in the longitudinal direction of the long guide rail 14, and the Y axis is an axis orthogonal to the X axis and in the horizontal direction.

  The base 9 is suspended from the longitudinal guide rails 4 and 4 via rolling wheels (not shown). Sprocket wheels are provided at both longitudinal ends of the longitudinal guide rail 4, and a chain meshed with the sprocket wheel extends endlessly along the longitudinal guide rail 4. This chain is connected to the base 9. By rotating one sprocket wheel by the X-axis driving air motor 20, the base 9 moves in the X-axis direction via the chain.

  The sub base 15 is suspended on the short guide rails 14 and 14 via rolling wheels (not shown). The sub-base 15 is moved in the Y-axis direction by the Y-axis driving air motor 18 through the chain in the same manner as the base 9. That is, sprocket wheels are provided at both ends of the short guide rail 14, the chain is spanned over the sprocket wheel, and the chain is connected to the sub-base 15. The Y-axis driving air motor 18 is installed on the base 9 and rotates one sprocket wheel.

  An X-axis driving air motor 20 is provided on the post 6 on one end side in the longitudinal direction of the frame 3. Compressed air is supplied from the compressor (FIG. 1) to the X, Y, and Z axis driving air motors 17, 18, and 20. The compressor 21 is operated by the operation panel 22.

  Air supply from the compressor 21 and high-pressure water injection from the nozzle 13 in the X, Y, and Z axis directions are automatically controlled by a control circuit provided in the control panel 23. High pressure water is supplied to the nozzle 13 via a pressure hose 26 from a pump mounted on the high pressure water washing wheel 25.

  The nozzle 13 includes a base tube portion 13a that extends vertically downward from the support box 12 and a pair of vertically downward nozzle portions 13b and 13b that are bifurcated from the base tube portion 13a. The nozzle 13 is rotatable in the θ direction in FIG. 2 with the axis of the base tube portion 13a as the center of rotation. In the support box 12, there is provided a rotation drive mechanism including an air motor or a water pressure motor for rotating the nozzle 13 in the θ direction.

  As shown in FIG. 3, a handle 28 for rotating the cleaning device moving tire 8 is installed on the lower frame 7. By rotating the handle 28, the tire 8 is rotated through the chain 29, and the frame 3 is moved laterally. It is possible to make it.

  In order to clean the tube bundle 1 with this tube bundle cleaning device, the base 9 is positioned at one end in the longitudinal direction of the tube bundle 1 and the nozzle 13 is positioned at a height immediately above the tube bundle 1. Then, the high pressure water is supplied from the high pressure water washing wheel 25 to the nozzle 13 and the high pressure water is jetted from the nozzle 13 while the base 9 is directed along the longitudinal guide rail 4 toward the other end in the longitudinal direction of the tube bundle 1. Move in the axial direction (forward movement). The water pressure of the high-pressure water is preferably 20 MPa or more, for example, about 20 to 280 MPa.

  When the base 9 reaches the other end of the tube bundle 1, the sub-base 15 is shifted in the Y-axis direction by one pitch. The width of this one pitch is set to be approximately the same as or slightly smaller than the turning diameter of the nozzle portion 13a of the nozzle 13. When the tube bundle 1 is very dirty, the base 9 is moved (returned) to the one end side while high pressure water is being jetted from the nozzle 13 without shifting by one pitch. When the dirt is very large, the base 9 may be reciprocated several times without shifting by one pitch.

  As described above, the base 9 is moved in the X-axis direction at one place to clean the tube below the movement locus, and then the sub-base 15 is shifted by one pitch in the Y-axis direction, and the rod 10 is moved in the Z-axis direction. After moving up and down in the direction to adjust the distance between the nozzle 13 and the tube bundle 1, the base 9 is moved forward or reciprocally to clean the tube below the movement locus. Similarly, the entire tube bundle 1 can be thoroughly and thoroughly washed by repeating 1 pitch shift of the sub-base 15 and forward or reciprocating movement of the base 9. If necessary, the same cleaning operation may be repeated once more after the above series of cleaning operations are completed.

  In this embodiment, since the nozzle 13 is rotated around the base tube portion 13a, high-pressure water can be reliably injected between tubes having different arrangement pitches.

  In the present invention, it is preferable that a microcomputer is provided as a control device of the control panel 23 and a series of control programs are stored in the microcomputer. When the sequence start operation is performed by inputting each condition such as length, diameter, number of tubes, degree of contamination, water pressure of high-pressure water, etc. by keyboard operation (or screen touch) from the operation panel, the above series of operations Is automatically executed.

  According to this tube bundle cleaning device, after the bundle (tube bundle) 1 of a shell-and-tube heat exchanger such as an oil refining plant is taken out during regular repairs, dirt adhered to the outer surface of the tube in the X, Y, and Z directions. Cleaning can be performed by a high-pressure water cleaning nozzle 13 that can be arbitrarily moved (three-dimensionally). Since this tube bundle cleaning device performs a cleaning operation by remote control, it has both cleaning safety and quickness.

  The tube bundle cleaning device according to this embodiment is manufactured to have a size that can be transported by a large truck, and can be installed at any position on the cleaning site. This tube bundle cleaning apparatus can be moved laterally by a tire 8 without passing through a track such as a rail, and a bundle to be cleaned that has been previously extracted from the shell can be quickly cleaned. This tube bundle cleaning device is easy to operate, and even an inexperienced operator can clean the entire tube bundle uniformly.

  The above-described high-pressure water washing nozzle 13 is a rotary type, but it is preferable that the high-pressure water washing nozzle 13 can be arbitrarily replaced in a fixed type.

  In addition, when using this tube bundle cleaning device, φ1,620 mm, length 6,100 mm, tube diameter 19 mm, tube number 2,400 tube bundles were cleaned at a high water pressure of 80 MPa and a water amount of 100 to 150 L / min. The two operators were able to complete the cleaning in about 30 minutes, and there was no uneven cleaning, resulting in a uniform finish.

  The conventional cleaning method in which the nozzle man holds the high-pressure water nozzle by hand requires two days in the daytime work, and the physical load on the nozzle man was heavy. However, the entire cleaning process was completed in about 3 hours in the apparatus of the present invention. . The physical load can be greatly reduced due to remote operation, and high-pressure water does not hit the human body.

  As described above, by using this cleaning device, work safety can be ensured, the physical load of the cleaning work can be reduced, and the heat exchanger can be uniformly cleaned in a short time regardless of the experience of high-pressure water cleaning. It was confirmed that

1 Tube bundle 3 Frame 4 Long guide rail 9 Base 10 Rod (vertical moving body)
DESCRIPTION OF SYMBOLS 13 Nozzle 13a Base pipe part 13b Nozzle part 14 Short guide rail 15 Subbase 17 Z-axis drive air motor 18 Y-axis drive air motor 20 X-axis drive air motor

Claims (3)

In the tube bundle cleaning device for cleaning the tube bundle by spraying water from the nozzle,
A longitudinal guide rail disposed above the tube bundle and extending in the longitudinal direction of the tube bundle;
A base movable along the longitudinal guide rail;
First driving means for causing the base to travel along the longitudinal guide rail;
A sub-base provided on the base and movable in a horizontal direction intersecting the tube bundle longitudinal direction;
Second driving means for moving the sub-base;
A vertically movable body supported by the sub-base so as to be vertically movable;
A third driving means for moving the vertical moving body up and down;
A tube bundle cleaning apparatus comprising: the nozzle provided at a lower portion of the vertically moving body.   2. The nozzle according to claim 1, comprising: a base pipe portion extending vertically in the vertical direction; and a nozzle portion that branches into two branches from the base pipe portion and that injects high-pressure water downward vertically. A tube bundle cleaning device, wherein the tube bundle cleaning device is driven to rotate about the axis of the portion.   3. The tube bundle cleaning device according to claim 1, further comprising a control unit that controls the nozzle to move in a longitudinal direction of the tube bundle in a state where the nozzle is located at a predetermined distance directly above the tube bundle.

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