JPH0318120B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a tube cleaning device for a heat exchanger. In particular, in devices that have storage containers at both ends of the tube and move a cleaning material such as a brush or sponge ball inside the tube, the direction of internal fluid flow is directed in the forward direction using a valve provided at the inlet and outlet of the heat exchanger. The present invention also relates to a tube cleaning device for a heat exchanger that cleans the inner wall of the tube by reciprocating the cleaning material while switching in the opposite direction at appropriate times.

[Conventional technology]

Conventionally, cleaning material storage containers are installed in the water chambers at both ends of the heat exchanger to accommodate the reciprocation of cleaning materials, but these storage containers are attached to both ends of each individual tube to prevent them from coming off the tubes. Glue or
Alternatively, a method is used in which a groove is cut in the inner surface of the tube and the tube is expanded to fix the tube, or the end of the container is made into a separate elastic structure so that only the end can be removed.

If the internal cleaning material is damaged, it is difficult to replace it if the container is fixed as is, and if the end part is removable, it is possible to maintain the cleaning material, but the cleaning material inside the container itself is damaged. must be attached using methods such as gluing or tube expansion, which requires a lot of effort, especially when there are a large number of tubes; However, they were not free from drawbacks such as problems such as disconnection due to insufficient expansion of the tube.

Furthermore, when the container is glued to both ends of the tube, the ends of the container are inserted into the tube opening, which reduces the flow area and increases the flow velocity, causing head loss and erosion. In addition, it took time and effort to check each one to see if they were fixed.

[Means for solving problems]

In this invention, in order to solve the above-mentioned drawbacks, the storage container is installed in the hole of the holding plate in advance, and the holding plate combined with the storage container is inserted into the tube plate without inserting the end of the storage container into the tube. It was attached to.

〔Example〕

To explain the figures, FIG. 1 is a side sectional view of an embodiment of the present invention, and FIG. 2 is a view taken along arrow A-A in FIG. It is attached to the plate 2 by a method such as tube expansion. There are water chambers 4 at both ends of the heat exchanger, and fluid flows into the water chambers 4, passes through the tubes 3, and exits from the opposite water chamber. A holding plate 7 to which a storage container 5 is attached in advance is attached to both ends of the tube, and a tube cleaning material 6 is stored in the storage container 5.

In FIG. 1, the flow direction of the fluid in the tube is to the right as viewed from the drawing, so the cleaning material is stored in the right storage container 5. Further, the flow flows from the left side to the right side of the figure, flows from the tube 3 to the container 5, and flows out from the small hole 51 of the container into the water chamber 4 on the right side (the water chamber on the left side is not shown).

If the flow direction is reversed to the left by switching the valve (not shown) connected to the inlet/outlet of the water chamber of the heat exchanger, the cleaning material 6 leaves the container 5 and flows inside the tube 3 while cleaning its inner wall. , is held in a storage container similarly mounted within the water chamber (not shown) on the opposite side (left side).

In this invention, as shown in the figure, the storage container 5 is attached to the holding plate 7 in advance.
It is attached to the hole in the tube plate 2 and fixed to the tube plate 2 with bolts 8 or the like. The structure of the container is as shown in the figure, with the tube plate connection surface facing outward and the edges bent, and the bent portion 52
may be held by being sandwiched between the holding plate 7 and the tube plate 2. Furthermore, if there are many tubes, the holding plate 7 may be divided into sections 71 as shown in FIG. 2, and each tube may be attached separately.

In the figure, reference numeral 41 denotes a flange of the water chamber 4, which is connected to the tube plate 2 with bolts 9.

However, in the apparatus of the present invention, as is clear from the above description and drawings, the storage container is attached to the hole in the holding plate in advance, and the holding plate is attached to the tube plate without inserting the end of the storage container into the tube. Because there is
The fluid is not compressed, which prevents head loss or erosion caused by increased flow velocity, and manufacturing is simple because there is no need to match the end of the container with the tube opening.

This invention has the above-mentioned configuration, and the storage container can be attached and removed freely with a simple configuration, and the effort of installing the storage device can be greatly reduced, and the installation can be performed reliably, improving reliability. In addition to a number of effects such as
A tube cleaning device is obtained which has the effect that speed increase does not occur, and thereby water head loss and erosion do not occur.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the tube cleaning device of the present invention, and FIG. 2 is a view taken along the line A--A in FIG. 1. Explanation of symbols, 1...Heat exchanger, 2...Tube sheet, 3
...Tube, 4...Water chamber, 5...Storage container, 6...
...cleaning material, 7...retention plate, 8, 9...bolt, 4
1...flange, 51...hole, 52...bending portion.

Claims (1)

[Scope of Claims] 1. A device for cleaning the inner wall of the tube by providing containers for tube cleaning material at both ends of the tube of a heat exchanger and reciprocating the cleaning material within the tube using the power of the internal fluid, A holding plate having holes facing the open ends of the tubes in the tube plate to which the tubes are attached, and to which a container is removably attached in advance to each hole, is inserted into the tube at the open end of the container. A tube cleaning device for a heat exchanger, characterized in that the device is removably attached to a tube plate without any problems. 2. The tube cleaning device for a heat exchanger according to claim 1, wherein the holding plate is divided into sections for each appropriate number of tubes, and is attached to each section. 3. The heat exchange tube cleaning device according to claim 1, wherein the holding plate is attached to the tube plate with bolts or the like using screw holes drilled in the tube plate.