JPS6380195A - Heat transfer tube cleaning device - Google Patents

Abstract

PURPOSE:To provide a heat transfer tube cleaning device which removes scale, dirt and stain attached to the external surfaces of heat transfer tubes in a heat exchanger by providing an outer frame which reciprocates parallel to a heat transfer tube with a divisional body on which a brush is planted that contacts and slides on the external surfaces of a heat transfer tube. CONSTITUTION:On a divisional body 1 which partitions the spaces S among heat transfer tubes A which are arranged in a large number with a distance a brush 2 which contacts and slides on the external surfaces of heat transfer tubes is provided, and said divisional body 1 is provided on a outer frame 3 which reciprocates parallel to the heat transfer tube A to provide a heat transfer cleaning tube. And then, by moving this outer frame 3 with a movement mechanism such as a crank mechanism, fluid pressure cylinder mechanism, cam mechanism, gear transmission mechanism or belt-and-pulley mechanism it is possible to remove in one go attachments attached to the external surfaces of heat transfer tubes which are arranged in a large number in a heat exchanger.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat exchanger tube cleaning device that cleans and removes scale, other dust, and dirt adhering to the outer surface of heat exchanger tubes in boilers and geothermal exchangers thereof. .

[Prior art] -a. In heat exchange equipment such as boilers, scale and dirt tend to adhere to the outer surface of heat exchanger tubes during operation, and there is particularly a lot of scale that adheres to the outer surface of heat exchanger tubes on the boiler furnace side. As a result, not only is this a bad phenomenon in which the thermal efficiency is lowered and the output is lowered, but also the adhesion of scale and dirt causes corrosion of the base material of the heat exchanger tubes, so they are periodically cleaned and removed.

Conventionally, in order to remove deposits such as scale and dirt that have adhered to the outside surface of the heat transfer tube, a nozzle connected to a high-pressure cleaning fluid source is installed inside the shell, and the nozzle is moved close to the outside surface of the heat transfer tube while the nozzle is being moved close to the outside surface of the heat transfer tube. It is known to remove deposits with a jet of fluid.

[Problem that the invention seeks to solve]

However, these conventional devices are installed in boilers, etc., and may not be able to completely remove soot, foreign matter, etc. attached to heat transfer tubes, etc. even if they are operated at the appropriate time. In the case of heat exchanger tubes, it is difficult to clean between the tubes that are arranged side by side, and as time passes, the amount of deposits that cannot be removed gradually increases. , a person enters the furnace and performs high-pressure water shared cleaning using a manual spray gun.
Alternatively, it may be necessary to remove the tubes using a scrubber, etc., and this manual removal method is not only cumbersome to handle, but also difficult to insert cleaning tools into the gaps between many heat transfer tubes in close proximity, resulting in problems with workability, safety, etc. . In particular, as heat exchangers have become larger, there has been the inconvenience that not only does it take too much time and effort on site, but cleaning is done by workers, which reduces work efficiency and makes it impossible to improve the cleaning effect to a large extent.

The present invention aims to accurately eliminate the drawbacks of these conventional methods, and is capable of accurately removing deposits on the outer surface of heat exchanger tubes by rubbing them with a brush, and in addition, cleaning a large number of heat exchanger tubes in close proximity. The object of the present invention is to provide an effective heat exchanger tube cleaning tool that can efficiently carry out cleaning operations and simplify handling of cleaning operations.

(Means for Solving the Problems) The present invention aims to reduce the space between adjacent heat transfer tubes in order to remove deposits attached to the outer surfaces of heat transfer tubes arranged in large numbers in a heat exchanger. A heat exchanger tube cleaning tool characterized in that a partition body that partitions the heat exchanger tube is provided with a brush that contacts and rubs the outer surface of the heat exchanger tube, and the partition body is arranged in an outer frame that reciprocates in parallel with the heat exchanger tube. It is.

〔Example〕

Embodiments of the present invention will be described with reference to examples in FIGS. 1 to 3. The outer surface of the heat exchanger tubes is brought into contact with and rubbed on a partitioning body 1 that partitions a space S between each of a large number of heat exchanger tubes A arranged at intervals. A brush 2 is installed and the partition body 1 is disposed on an outer frame 3 that reciprocates in parallel with the heat exchanger tube A to serve as a heat exchanger tube cleaning tool. In this case, the partitioning body 1 is a comb-shaped partitioning body that partitions at least a part of the outer periphery of each heat exchanger tube, and has a large number of parallel recesses 4 surrounding the outer peripheral surface of the heat exchanger tube on three sides. ,
Brushes are installed protrudingly on the inner peripheral surface of the recess 4 (Fig. 2 A, B, and C), or corrugated brush mounting plates are installed between the heat exchanger tubes A to connect the heat exchanger tubes A in parallel. (Fig. 2D), or a brush mounting plate is framed in a lattice pattern, and brushes are installed on both sides of the mounting plate from all four sides of the outer surface of the heat exchanger tube. It is constructed with protruding scrubbing brushes (FIG. 3) to remove all deposits on the outer surface of the heat exchanger tubes arranged in large numbers in the heat exchanger at once.

The partitioning body 1 may be a tooth-shaped brush mounting plate with one or both sides of a plate-like member formed with an uneven surface, and a brush 2 may be protruded from the inner peripheral surface of each recess 4, or the brush 2 may be protruded from the inner peripheral surface of each recess 4. A large number of brush mounting plate compartments 1 are provided on the outer frame 3 in a removable manner, and the outer frame 3 is provided with staggered or lattice shapes as shown in FIGS. For example, the outer frame 3 may be any device for attaching the compartment 1 with the brush 2, and should be configured to be removable so that the brush 2 can be easily placed. and partition body 1
The width W is the interval between row A of heat transfer tubes! If it is larger, it may be installed in a staggered manner as shown in FIG. 3A, and if W≦l, it may be installed in an array as shown in FIG. 3B. They are installed in the outer frame 3 so that they can be arranged in a single row or in multiple rows.

This outer frame 3 has a moving mechanism 5 that reciprocates in parallel with the heat exchanger tube so as to move along the longitudinal direction of the heat exchanger tube, such as a crank mechanism, a fluid pressure cylinder mechanism, a cam mechanism, a gear transmission mechanism, or a wrap transmission mechanism. The outer surface of the heat exchanger tube A can be cleaned by surrounding the heat exchanger tube A with a brush 2 and moving parallel to the heat exchanger tube A.

The brush 2 is a wire brush made of a metal wire, a synthetic resin brush, a natural brush, or a combination thereof, and is installed directly or indirectly through an intermediary member, and the tip of the brush is either a closed end or a looped end. In addition to using a sponge or other elastic adhesion removing member as appropriate, if a twisted wire, pipe, or other ring member is used for the partition body 1 instead of a mounting plate, an appropriate fixing means may be used. Just adopt it.

The example in Fig. 4 shows a pair of outer frames 3.3, which are integrally connected with lattice-like partitions, and are reciprocated by a crank-based moving mechanism 5. It was designed to clean a group of brass pipes at once.

In the example shown in Fig. 5, a brush 2 is fixed to a mesh-shaped compartment 1 made of wire, and the brush 2 is removably fastened to an outer frame 3 and stretched, so that it can be used for cleaning work in the same way as in the previous example. However, the cleaning tool may be arranged in a vertical lattice shape, or may be arranged in one or more stages and reciprocated in parallel with the heat transfer tubes to clean the outer surface of the heat transfer tubes.

In this case, it is preferable to arrange a large number of rod-shaped compartments 1 with brushes 2 embedded therein in a mesh pattern and attach them to the outer frame 3 to create a removable cleaning tool, which is a cleaning brush that corresponds to the arrangement of the heat exchanger tubes A. shall be.

Therefore, when cleaning the outer surface of the heat exchanger tube A of a heat exchanger that does not have a closed container, the heat exchanger tube A is arranged with the outer frame 3 so that the heat exchanger tube A enters the center position of the recess 4 of the partition 1, and the heat exchanger tube By reciprocating in parallel with A, the brush can be rubbed on the outer surface of the heat exchanger tubes to easily remove deposits, and it is possible to clean a large number of heat exchanger tubes at once.

〔Effect of the invention〕

In the present invention, the shape of the brush is adapted to the arrangement of the heat exchanger tubes, and the structure is such that it is possible to clean a large number of tubes at once.
Cleaning of the heat transfer tubes is now easy, and even if the heat transfer tubes are installed in a fluid with a lot of dirt, they can be easily cleaned, maintaining good thermal efficiency and preventing performance deterioration, and the cleaning work is also simple. This can be done efficiently and greatly improve work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a part of an embodiment of the present invention, Fig. 2 A-D
3A and 3B are perspective views of parts of still other embodiments, FIG. 4 is a perspective view of the other side in one use state, and FIG. 5 is a plan view of a part of another embodiment. FIG. A...Heat exchanger tube, 1...Dividing body, 2...Brush, 3
...outer frame, 4...recess, 5...movement mechanism. Patent Applicant Ebara Corporation Agent Patent Attorney Yakushi Minoru Agent Patent Attorney Yori 1) Takajibe Agent Patent Attorney Tadashi Takagi Figure 3

Claims (9)

[Claims] (1) In order to remove deposits attached to the outer surfaces of the heat exchanger tubes arranged in large numbers in the heat exchanger, the outer surfaces of the heat exchanger tubes are placed on partitions that partition the space between adjacent heat exchanger tubes at intervals. 1. A heat exchanger tube cleaning tool comprising: a brush that contacts and rubs the heat exchanger tube; and the partition body is disposed on an outer frame that reciprocates in parallel with the heat exchanger tube. (2) The partition body is a comb-shaped partition body in which a large number of recesses surrounding the outer peripheral surface of the heat exchanger tube are arranged in parallel, and a brush is implanted protrudingly on the inner peripheral surface of the recess. The cleaning tool described in item 1. (3) The partitioning body is a structure in which a brush mounting plate is framed in a lattice shape, and brushes that rub the outer surface of the heat exchanger tube are protruded and implanted on both sides of the mounting plate. A cleaning tool as described in Scope 1. (4) The partitioning body is a corrugated brush mounting plate that threads between the heat exchanger tubes, and a brush that rubs against the outer surface of each of the heat exchanger tubes arranged in parallel is implanted in a protruding manner. Range 1
Cleaning tools listed in section. (5) The partitioning body is a tooth-shaped brush mounting plate having an uneven surface on one or both sides, and a brush is implanted protrudingly on the inner circumferential surface of each recess. Cleaning tools. (6) The cleaning tool according to any one of claims 1 to 5, wherein the partition body has a plurality of brush mounting plates with brushes protruding from the outer frame, which are removably attached to the outer frame. (7) The partitioning body is a tooth-shaped brush mounting plate with uneven surfaces on both sides, and is installed on the outer frame in a staggered or lattice pattern corresponding to the spacing between the rows of heat transfer tubes. A cleaning tool according to any one of ranges 2 to 6. (8) The method according to any one of claims 2 to 7, wherein the partitions are installed in an outer frame so as to be arranged in a single row or in multiple rows on the heat exchanger tube. Cleaning tools. (9) Any one of claims 2 to 8, wherein the outer frame is provided with a movement mechanism that reciprocates in parallel with the heat exchanger tube so as to move along the longitudinal direction of the heat exchanger tube. Cleaning tools listed in Section 1.