JPH0455752B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <<Industrial Application Field>> The present invention relates to a cleaning device, and more particularly to a cleaning device suitable for cleaning a tube assembly of a heat exchanger using high-pressure cleaning water.

<<Prior Art>> In heat exchangers used in petrochemical plants and the like, the tube assembly is periodically extracted from the heat exchanger to the outside and cleaned with high-pressure cleaning water. This tube assembly can be as heavy as 2 m in diameter, 10 m in length, and several tons in weight.

Conventionally, when cleaning a tube assembly with high-pressure water, the tube assembly is placed on a sleeper using a crane, and a worker uses a high-pressure water jet nozzle in his hand to wash the tube assembly with high-pressure water. This was done by hand on a car, and once a portion of the tube was cleaned, a retcher was used to rotate the tube assembly a predetermined amount to clean the remaining portion.

Furthermore, as a solution to the above-mentioned manual work, an automatic cleaning device has been proposed that fully automatically rotates the tube assembly, moves the high-pressure water jet nozzle, etc.

<<Problems to be Solved by the Invention>> However, in the conventional manual cleaning described above, a worker climbs on top of the tube assembly and performs the cleaning work, so the worker may slip due to deposits such as sludge. In order to easily and easily increase the cleaning effect, ultra-high pressure water of 200 to 500 Kg/ ^cm2 is used, so the spray reaction force of the cleaning water jet nozzle is 15 to 40 Kg.
It is extremely dangerous. In addition, cleaning efficiency is low because workers can only hold one cleaning water jet nozzle, and the direction of the cleaning water jetting is not constant, so the sludge blown away by the cleaning water re-adheres to the cleaned area, causing the problem. Since the nozzle is sprayed from the side in order to remove the dirt, the dirt is scattered over a wide area, so there is a problem in that a large cleaning space is required.

There was also the inconvenience of having to keep the retrieval car on standby for the rotation of the tube assembly.

Furthermore, in the case of automatic cleaning equipment, since the frequency of cleaning the heat exchanger is once every few years or once or twice a year, there is a problem that an expensive equipment is not practical.

<Means for Solving the Problems> The present invention has been made in view of the above problems, and includes a pair of running rails and a pair of rolls provided between the running rails in parallel with the running rails. The intermediate part in the longitudinal direction has a support roll for rotatably mounting the object to be cleaned, the diameter of which is smaller than that of both sides, and a wheel with tires that runs on the traveling rail. a gate-shaped frame configured by installing a vertical member with a cross member connected to the upper end on a pair of bases, a nozzle support provided vertically movably between the vertical members, and a left and right side of the nozzle support. a nozzle body for injecting high-pressure water that is movably suspended in a nozzle body, a rotational drive means for rotationally driving the support roll, and a moving means consisting of an air motor for driving the gate-shaped frame. It is characterized by

<<Operation>> In the present invention, a gate-shaped frame having a high-pressure water cleaning nozzle runs over an object to be cleaned that is placed on a rotatable support roll to clean it.

"Example" The present invention will be explained based on illustrated embodiments.

In the figure, reference numeral 1 denotes a frame, which has running rails 2a, 2b on both sides, and these running rails 2a, 2.
The railing members 3a to 3d are spanned between the rails 2a and 2b to fix the running rails 2a and 2b in a parallel state. Support rolls 4a and 4b are provided in parallel between the traveling rails 2a and 2b, and bearings 5 and 5 are fixed to each of the rail members 3a to 3d.
It is pivoted on... Note that this support roll 4
Since the intermediate part between a and 4b is composed of the shafts 4a' and 4b' of the support rolls 4a and 4b, when the tube assembly described below is placed on the support rolls 4a and 4b, A gap d is formed between the tube assembly and the shaft.

Reference numerals 6a and 6b denote rotary drive means consisting of air motors, which rotatably drive the support rolls 4a and 4b via sprockets 7a and 7b provided on the shafts 4a' and 4b'. can be rotated in the same direction and at the same speed.

In the figure, 8 is a gate-shaped frame, and vertical members 10 extend upward from a pair of left and right bases 9a and 9b.
a, 10a', 10b, 10b' are established, and a rod member 11 is connected to the upper end thereof,
It has a gate-like shape as a whole.

In addition, wheels with tires 13a, 13a', 13a'' and 13b, 13b', 13b'' are provided in the longitudinal direction of the bases 9a, 9b, respectively, and inside thereof, the above-mentioned running rails are respectively provided. 2a, 2b, iron wheels 14a, 14a' and 14b, smaller than the wheels with tires described above,
14b' is provided.

Furthermore, among the above wheels, 13a', 13b', 14
a and 14b are fixed to the same rotating shaft 15.

Reference numeral 16 denotes a moving means consisting of an air motor for moving the portal frame 8, and the rotating shaft 15
It is now possible to rotate.

Reference numeral 17 denotes a nozzle body, which is equipped with a large number of downward nozzles 18, 18...
are left and right vertical members 10a, 10a', 10b, 10
b' is suspended on a nozzle support 20 which can be moved up and down as shown by the arrow a in FIG. b). Although not shown, the nozzle main body 17 is connected to high-pressure water supply means constituted by a high-pressure pump with a pressure-resistant hose.

In the figure, reference numeral 21 denotes a shielding plate made of plywood provided under the rolls 4a, 4b of the pedestal 1, which is inclined so that both sides of the pedestal 1 (rails 12a, 12b side) are lower. 22 is a stand on which the operator stands.

In the above embodiment, when cleaning, the pedestal 1 and the gate-shaped frame 8 are transported by truck near the heat exchanger, the pedestal 1 is first placed on the ground (concrete surface) G, and then the pedestal 1 is moved Rail 2a,
Wheels 14a, 14 of the portal frame 8 are attached to one end of 2b.
a', 14b, and 14b' are placed and positioned to assemble the stand and gate frame. Next, the tube assembly T extracted from the heat exchanger is placed on the support rolls 4a and 4b of the pedestal 1 using a crane, and preparation for cleaning is completed.

In addition, when placing the gate-shaped frame 8 on the pedestal 1,
By interposing an auxiliary rail (not shown) between the ground G and the frame 1 and rotating the air motor 16, the wheels 13a', 13b' and the wheels 14 with tires are installed.
It can be easily mounted by rotating a and 14b.

Now, when cleaning, after adjusting the height and left and right positions of the nozzle body 17, high pressure water is jetted downward from the nozzles 18, 18... of the nozzle body 17,
In addition, the gate-shaped frame 8 is moved on the traveling rails 2a and 2b (arrow C in FIGS. 1 and 2). This movement is performed by rotating the air motor 16, which causes the wheels 14a, 14b to rotate.

When the gate frame 8 is located at the other end of the tube assembly T in the longitudinal direction, the air motors 6a, 6
After rotating the tube assembly T by a predetermined amount by driving the rolls 4a and 4b by a predetermined amount, the gate-shaped frame 8 is moved again in the opposite direction. This is repeated several times to complete cleaning of the tube assembly.

In the above embodiment, both support rolls 4
Although a and 4b are rotated, only one of them may be provided with a rotation drive means, and the other may be allowed to rotate freely.

According to the above embodiment, since it is constructed from a simple stand and a gate-shaped frame, it can be loaded onto a truck and easily transported and installed at a cleaning site, so there is no need to permanently install a cleaning device. In addition, since the middle part of the support roll has only a shaft with a diameter smaller than the diameter of the support roll, it is easy to insert the rope when placing or lifting the tube assembly on the pedestal. Since the shield plate is provided with a slope on the side, the sludge separated by washing can be effectively discharged to the side of the frame. Furthermore, since the cleaning water jetting nozzle is always facing downward, there is no risk of the peeled dirt spreading, so it can be used in a narrow space.

Furthermore, since the gate-shaped frame can be moved on the ground by the air motor, it can be placed on the pedestal by itself by using the auxiliary rails to the pedestal 1.

Furthermore, since an air motor is used, there is no risk of electrical leakage even in wet work sites.

According to this embodiment, cleaning of a tube assembly with a diameter of 1,500 mm and a length of 8,000 mm can be done in four steps using conventional manual methods.
It took a while, but I was able to clean it in just one hour.

<<Effects>> According to the present invention, the cleaning device has a gate-shaped frame equipped with a pedestal equipped with a rotationally driven support roll and a nozzle body that is movable on the pedestal, so the structure is extremely simple and can be manufactured at low cost. Moreover, since the pedestal and the gate-shaped frame can be disassembled and easily transported to the cleaning site, there is no need to permanently install a cleaning device. Further, since the cleaning water can always be jetted downward without the operator having to hold the high-pressure cleaning water spouting nozzle, there is an effect that the cleaning work can be carried out safely and completely.

Further, in the present invention, since the diameter of the intermediate portion of the support roll is smaller than the diameter of the support roll, it is easy to insert a rope when placing or lifting the tube assembly on the pedestal.

Furthermore, the gate frame is equipped with wheels that run on running rails and wheels with tires, so the gate frame can be moved on the ground, and by using the auxiliary rails to the stand, it can be placed on the stand by itself. I can do it.

Furthermore, since an air motor is used as the moving means for moving the gate-shaped frame, there is no risk of electrical leakage even at a wet work site.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention,
Figure 1 is a plan view, Figure 2 is a side view, Figure 3 is a
FIG. 3 is a right side view of the figure. 1... Frame, 2a, 2b... Traveling rail, 4a, 4
b...Support roll, 8...Gate frame, 9a, 9b
...Base, 10a, 10a', 10b, 10b'...Vertical member, 11...Ran member, 14a, 14a', 14b, 1
4b'... Wheel, 17... Nozzle body, 20... Nozzle support.

Claims (1)

[Claims] 1. A pair of running rails and a pair of rolls provided between the running rails in parallel with the running rails, the object to be cleaned having a longitudinally intermediate portion having a smaller diameter than both side portions. a pair of bases having support rolls for rotatably mounting the vehicle; and wheels running on the traveling rails as well as wheels with tires; a nozzle support provided vertically movably between the vertical members; a nozzle body for injecting high-pressure water suspended from the nozzle support so as to be movable laterally; and the support. A cleaning device comprising: rotational drive means for rotationally driving the roll; and moving means comprising an air motor for moving the gate-shaped frame.