JP2769688B2 - Brush cleaning device for heat exchanger tube cleaning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning apparatus for cleaning a brush used for cleaning a tube of a heat exchanger which is frequently used in a power plant, a chemical industry and the like for reuse.

[0002]

2. Description of the Related Art A heat exchanger used in a power plant, a chemical industry, or the like is generally composed of a large number of tubes, and heat is exchanged between a fluid flowing inside the tubes and a fluid flowing outside. ing. If the fluid flowing inside the tube contains impurities such as solid pieces, or if solid impurities are generated as a result of a chemical change in the fluid, they will accumulate on the inner wall of the tube and increase the heat exchange efficiency. Lower. A heat exchanger is used as a cooler, and when a large amount of heat is exchanged, seawater is often used as a fluid flowing through the tube. In this case, a sedimentation basin is installed at the seawater intake and a screen such as a wire mesh is installed to prevent the inflow of impurities. The deposits accumulate on the inner wall of the tube, significantly reducing the efficiency of the heat exchanger.

[0003] Therefore, these heat exchangers require regular inspection and cleaning of their inner walls. There are several methods for cleaning depending on the properties of the deposits, and one of them is a method of inserting a cleaning brush through the tube to be cleaned. FIG. 3 ((A) is a front view, (B) is a right side view) is a diagram showing a cleaning brush used for cleaning the inner wall. As shown in the figure, the cleaning brush 1 is formed by attaching a plurality of disks 3 to the outer periphery of a small diameter portion 2B of a stepped round bar-shaped main body 2. Large diameter part 2A of main body
And the outer diameter of the disk 3 are machined substantially the same as the inner diameter of the tube to be cleaned.

When the cleaning brush 1 is inserted from one end of the tube to be cleaned and pressed with a pressurized fluid such as compressed air or pressurized water, the cleaning brush 1 scrapes off the deposits on the inner wall of the tube to be cleaned. Proceed to the end and the tube is cleaned. This method of cleaning the tubes for the heat exchanger is simple and reliable, and can improve the efficiency of the cleaning operation of the tubes for the heat exchanger. However, the scraped-off sediment is clogged between the disks 3 of the cleaning brush 1 after the cleaning operation, and it is necessary to remove the sediment in order to reuse it. There was no choice but to rely on manual work unavoidably, but there was a disadvantage that it required enormous man-hours.

[0005]

SUMMARY OF THE INVENTION The present invention provides an apparatus for efficiently cleaning a heat exchanger tube cleaning brush in order to solve the above-mentioned drawbacks of the conventional heat exchanger tube cleaning method. It is an object.

[0006]

According to the present invention, the above-mentioned object is attained by constructing a brush cleaning device for a tube for a heat exchanger from the following (A) to (E). (A) A casing having a box shape. (B) has a cylindrical shape, is rotatably supported on the casing via a bearing, is connected to a rotational power source,
A rotary drum having a plurality of grooves parallel to a cylindrical axis having a semicircular cross section on the outer surface thereof. (C) The outer circumference of a cylindrical base is planted with bristles, rotatably supported on the casing via bearings, connected to a rotational power source, and the leading end surface of the bristles is an outer surface of the casing. A plurality of rotating brushes installed close to. (D) A water injection nozzle installed inside the casing and connected to a pressure water source such as tap water. (E) An insertion port and a discharge port of a brush for cleaning a heat exchanger tube provided in the casing.

[0007] A cleaning device for a brush for cleaning a tube for a heat exchanger having the above configuration (hereinafter simply referred to as a "cleaning device").
When the cleaning brush after the cleaning operation is inserted into the insertion opening of the cleaning drum, the cleaning brush rotates together with the rotating drum while engaging with the groove of the rotating drum, and pressurized water sprayed from the water spray nozzle and the rotating brush are rotated. As a result, the sediment is washed and discharged from the discharge port. With the cleaning device prototyped by the applicant, it is possible to clean about 1,000 pieces / hour for one unit, and it is possible to greatly reduce the number of artificial objects.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an example of a cleaning apparatus according to the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a right side view. FIG. 2 is a diagram for explaining a function in which a main part is enlarged. 1 and 2, a cleaning device 11 includes a box-shaped casing 12, a rotating drum 13, a rotating brush 14,
It is composed of a water injection nozzle 15, an insertion port 16 for the cleaning brush 1, an outlet 17 and the like, and is usually mounted on a transport vehicle 4 equipped with casters 4A and carried to an installation site of a heat exchanger under disassembly and inspection.

The rotating drum 13 is built in the casing 12, is rotatably supported by the casing via a bearing, and is connected to a drum rotating motor 18 to rotate.
A plurality of grooves 21 parallel to its axis are provided on the outer surface of the rotating drum.
(See FIG. 2). A plurality (four in this example) of rotating brushes 14 are built in the casing 12,
It is rotatably supported on the casing via a bearing,
It is connected to a brush rotation motor via a transmission 20 and rotates. The rotating brush 14 is formed by implanting hairs on the outer periphery of a cylindrical shape, and is installed such that the tips of the implanted hairs are close to the outer surface of the casing 12.

A water injection nozzle 1 is provided inside a casing 12.
5 (two in this example) are installed. The injection nozzle is connected to a pressure water source such as tap water, and is provided so that the injected water is poured onto the outer periphery of the rotating drum 13. An insertion opening 1 for the cleaning brush 1 is provided at an upper portion outside the casing 12.
6, and a discharge port 17 is provided at the lower part. After the cleaning operation, the cleaning brush 1 is inserted through the insertion port 16 and sent to the rotating drum 13. There, the sediment in the tube of the heat exchanger, which is received by the groove 21 and sent to the rotating drum, is washed with the water jetted from the water jet nozzle 15 and is clogged between the disks 3 of the cleaning brush 1. Is washed away.
Next, with the cleaning brush 1 sandwiched between the rotating drum and the rotating brush, the deposits remaining by flocking of the rotating brush are washed and sent to the discharge port 17 (see FIG. 2). The discharged brush 1 is stored in a cleaning brush container 22 mounted on the transport vehicle 4 (see FIG. 1). Drainage ports 23 and 24 are provided on the side and bottom of the casing 12, respectively. The overflow of the washing water from the drain port 23 keeps the water level in the casing constant, and after the washing operation, the washing water containing the sediment is drained from the drain port 24 with the valve (see FIG. 2).

[0011]

According to the present invention, the following excellent effects can be obtained in disassembly and cleaning of a heat exchanger by using a cleaning device including a casing, a rotating drum, a rotating brush, a water injection nozzle and the like. is there. After the cleaning operation of the heat exchanger tube is completed, the deposits clogged in the cleaning brush can be easily and reliably cleaned. The man-hour required for cleaning the cleaning brush can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a cleaning device according to the present invention,
(A) is a plan view, (B) is a front view, and (C) is a right side view.

FIG. 2 is a diagram for explaining a function in which a main part of the cleaning device is enlarged.

FIGS. 3A and 3B are views showing a cleaning brush used for cleaning the inner wall of the heat exchanger tube, wherein FIG. 3A is a front view and FIG. 3B is a right side view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cleaning brush 2 Main body 2A Large diameter part 2
B Small-diameter portion 3 Disk 4 Transport vehicle 4A Caster 11 Cleaning device 12 Casing 13 Rotary drum 14 Rotary brush 15 Water injection nozzle 16 Insertion port 17 Discharge port 18 Drum rotation motor 19 Brush rotation motor 20 Transmission device 21 Groove 22 Cleaning Brush container 23 drain 24 drain

Continuing from the front page (72) Inventor Kazuhide Yamagishi 9-4 Aoyamacho, Kashiwazaki-shi, Niigata Prefecture TEPCO Kashiwazaki-Kariwa Nuclear Power Plant (58) Field surveyed (Int. Cl. ⁶ , DB name) A46B 17 / 06 B08B 3/02

Claims (1)

(57) [Claims] An apparatus for cleaning a tube-cleaning brush for a heat exchanger, comprising the following elements (A) to (E): (A) A casing having a box shape. (B) has a cylindrical shape, is rotatably supported on the casing via a bearing, is connected to a rotational power source,
A rotary drum having a plurality of grooves parallel to a cylindrical axis having a semicircular cross section on the outer surface thereof. (C) The outer circumference of a cylindrical base is planted with bristles, rotatably supported on the casing via bearings, connected to a rotational power source, and the leading end surface of the bristles is an outer surface of the casing. A plurality of rotating brushes installed close to. (D) A water injection nozzle installed inside the casing and connected to a pressure water source such as tap water. (E) An insertion port and a discharge port of a brush for cleaning a heat exchanger tube provided in the casing.