JPS61130798A - Pipe cleaning device - Google Patents

Abstract

PURPOSE:To efficiently remove clinker from a heat transfer pipe, by fitting a nozzle to inject clinker softening agent and a unit to remove clinker by giving impact shock to the softened clinker to a pipe cleaner body, and by enabling to pivotally move one of the above-mentioned devices to a pipe cleaner body. CONSTITUTION:Clinker 25 is wetted by the water injected from a nozzle 21 by vibrating a needle 23a consisting of a bundle of piano cords fitted to a clinker remover 23 back and forth, and softened clinker 25 is removed from the surfaces of heat transfer pipes 5. Next, a rocking device 26 rocks both clinker remover 23 and nozzle 21 fitted to a main cleaner body 20 in the direction at right angles with the axis of a cleaner body 20. The cleaner body 20 fitted to the end of an arm 11 pivotally moves centering a pin 27. With such an arrangement, highly free movement can be obtained in a pipe cleaning body by up and down pivotal movement of a nozzle 21 and a clinker remover 23 to the pipe cleaner body 20 and by rocking action to the cleaner body 20, in addition to the functions of a pipe cleaner body for heat transfer pipes such as pivoting of an arm, elevation of an arm itself, and pivotal movement of a cleaner body 20 centering the pin 27. As a result, every part of a heat transfer pipe can be cleaned by the titled pipe cleaner.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an apparatus for cleaning tube bodies constituting a heat transfer tube group of a large boiler such as a boiler for a power plant.

Technical background of the present invention In large boilers for business offices and large industrial boilers for power plants, superheaters, reheaters, etc. are placed above the boiler, and the internal fluid (steam) is heated by high-temperature gas passing through these tube groups. The structure is such that the temperature and pressure are increased. Since the gas passing through these heat transfer tube groups is not dust-removed, unburned components in the gas flow adhere to the tube surfaces, forming a strong clinker layer.

Formation of the clinker layer reduces the heat transfer efficiency of the heat transfer tube and reduces the cross-sectional area of the flow path of the high temperature gas, resulting in problems such as an increase in pressure loss of the gas flow. For this reason, clinker is removed when boiler operation is stopped, such as during regular boiler inspections, but as this work relies entirely on manual labor, the following problems arise and need to be resolved as soon as possible. I'm under pressure.

(1) Because it is necessary to erect scaffolding inside the furnace, it takes a considerable number of days to assemble and remove the scaffolding.

(2) Because the superheater is located several tens of meters above the bottom of the furnace, removing the talin force is extremely dangerous, and the work environment is very dangerous as there is a large amount of scattered clinker powder floating around. As a result, it is becoming difficult to secure workers.

(3) For example, the superheater is quite large with a height of about 8 m and a depth of about 11 m, and it takes a long time to remove clinker because it is made of many panel-shaped heat transfer tubes and grooves.

For this reason, the inventors have separately proposed a device for removing these clinkers.

OBJECTS OF THE INVENTION The present invention provides a device for removing clinker firmly attached to a pipe body, and particularly provides a device suitable for attachment to a pipe cleaning device proposed by the present inventors. The purpose is to

Summary of the Invention In short, the present invention includes a device for injecting a clinker softener such as water, and a device for removing softened clinker by physical force such as impact force, as a unit. It is a device configured to be attached to a cleaning device.

<Outline of the device using the device of the present invention> FIG. 3 shows a device suitable for installing the device of the present invention, which will be described later, which has been separately proposed by the inventors as a heat exchanger tube cleaning device. First, the outline of this heat exchanger tube cleaning device will be explained.

The reference numeral indicates a rail, and the width thereof is smaller than the inner diameter of the manhole 2 so that it can be carried into the interior through the existing inspection manhole 2 formed in the boiler body. Reference numeral 3 denotes a support member that fixes the rail 1 to the inclined surface 4 located at the lower part of the superheater 5 arrangement section. 6 is a running trolley that moves along the rail, and 7 is an arm support attached to this running trolley.
It is one member. This arm support member 7 is configured to be able to rotate at a hinge of 7 degrees with respect to the traveling truck 6, and when being carried into the boiler, it is folded down so that it is parallel to the rail 1, so that it can be carried into the boiler. 8 is the support member 7
It is a clamp attached to the tip (upper end) of the clamp, and is configured to be able to rotate in the X and Y directions.While the support member 7 is moving, it rotates in the X direction and closes. The sliding member 9 is configured to be movable along the side wall of the heat exchanger tube. When the arm support member 7 reaches a predetermined position, the clamp 8 is opened in the Y direction and engaged with the heat exchanger tube to support the upper end of the arm support member.

Reference numeral 10 denotes a lifting platform attached to the arm support member 7, and an arm 11 for cleaning work is attached to this lifting platform 10. 12 is a cylinder for rotating the arm, and 13 is a working attachment attached to the tip of the arm, and this attachment can be changed in various ways depending on the content of the work.

In the apparatus configured as described above, the heat transfer tubes at a predetermined position are cleaned by moving the arm support member 7, raising and lowering the lifting table 10, and operating the arm 11.

The present invention is a tube cleaning device that can be optimally implemented in the above devices.

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

Reference numeral 20 in the figure is a main body of the tube cleaning device, and the illustrated device is attached as a replacement member to the arm 11 of the heat exchanger tube cleaning device described above. 21 is a nozzle for spraying a clinker softener (for example, water, hereinafter referred to as "water"), and 22 is a cylinder for adjusting the spray direction of this spray nozzle 21. 23 is a clinker removing device, the main body of which is configured to be rotatable around a pin 24 by a driving device (not shown) such as a cylinder. 23a is a needle (a bundle of piano wire, etc.) attached to this clinker removing device, and by vibrating it back and forth, the clinker 25 moistened and softened by the water injected from the nozzle z1 is removed from the surface of the heat transfer tube 5. Next, reference numeral 26 refers to the clinker removing device 23 and nozzle 21 attached to the main body zO, as shown in FIG.
This is a rocking device for rocking in a direction perpendicular to the zero axis. As a function of the arm 11 itself, the cleaning device main body 2o attached to the tip of the arm rotates around the pin 27. In other words, this device rotates the arm,
In addition to the functions of the heat exchanger tube cleaning device such as raising and lowering the arm itself and rotating the main body 20 around the pin 27, the vertical movement of the glue 21 and the clinker removing device 23 relative to the main body 20 and the swinging relative to the main body increase the This provides a greater degree of freedom and allows cleaning of all parts of the heat exchanger tube.

Effect> By carrying out the present invention, clinker adhering to the tube wall surface can be effectively removed, and it is particularly effective when attached to a heat exchanger tube return device that the inventors have proposed separately. Demonstrate.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of the device of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a perspective view of the heat exchanger tube cleaning device. 11...Arm 20...t...Device body 21...Softener injection nozzle 23, mountain...Clinker removal device z5...Clinker

Claims (1)

[Claims] 1. A nozzle for injecting a clinker softener and a device for removing clinker by applying an impact to the softened clinker are attached to the main body of the device, and at least one of these nozzles and the clinker removing device is attached to the main body of the device. A tube cleaning device characterized in that one side is configured to be rotatable relative to the main body. 2. The device main body is attached to a working arm supported by an arm support member disposed within the heat transfer tube group, and the clinker removal device and the softener injection nozzle are swung in a direction perpendicular to the axis of the arm. A pipe body cleaning device according to claim 1, characterized in that it is configured as follows.