JPS63243603A - Shifter among heat transfer tube group - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Field of Application in Industry> The present invention relates to a moving device for moving between groups of heat transfer tubes in a boiler, and in particular, when performing inspection, measurement, and cleaning operations from the outer surface of the heat transfer tubes, The present invention relates to a moving device suitable for moving equipment between groups of heat exchanger tubes.

<Prior art and its apex> Fig. 3 shows a sectional view of the entire boiler. The heat transfer tubes 7 within the boiler are arranged horizontally with respect to the combustion gas flow, as shown in FIGS. 3 and 4.

Both horizontal ends of each heat exchanger tube 7 are fixed to the boiler water wall 11 as shown in FIG. 4, and the heat exchanger tubes 7.7 are supported by spacers 13.

9 is a furnace, 10 is a burner, and 12 is a header.

The heat transfer tube 7 of the boiler effectively transfers heat from the combustion gas.
In order to recover heat by transferring it to the internal steam or water supply, the heat transfer area is reduced in the high-temperature gas section where the combustion gas temperature is high, and the 1m area for heat transfer is increased in the low-humidity gas section where the combustion gas temperature is low. ing.

For example, the heat exchanger tubes 70 are installed with the interval 14 changed as shown in FIG. 3 ABC depending on the combustion gas temperature. Third
The pitch P in the high temperature gas section ■■ in the figure is approximately 300 mm,
Pitch P is about 15Qmm1i? After J, the pitch P in the low humidity gas section ◎ is about 100 mm, and the diameter of the heat transfer bone 7 is about 50 mm.
~60mm.

Therefore, the spacing 14 between the heat transfer tubes 7 in the hot gas section is approximately 250 mm.
The spacing 14 in the low temperature gas section (2) is narrow at about 50 mm. For this reason, in the high temperature gas section (1), a worker should either crawl between the groups of heat transfer tubes 7 and 7 to perform inspection, measurement, and cleaning work, or install an inspection, measurement, and cleaning device at the end of the arm to perform inspection, measurement, and cleaning work. However, in the low-temperature gas section ◎, the interval 14 between the heat exchanger tubes 7 is narrow, so the worker must insert only his hand into the panel interval 14 of the heat exchanger tube 7 and inspect, measure, and clean only the area that his hand can reach. The current situation is that inspection, measurement, and cleaning operations must be carried out after cutting the 7th and 7th groups and widening the interval 14 between the heat transfer tubes 70.

Furthermore, even if an inspection, measurement and cleaning device is attached to the tip of the arm for inspection, measurement and cleaning work, even if the device itself is lightweight, each device needs to be stably attached to the heat transfer tube 7, so the arm must have an appropriate rigidity. As a result, the arm's own weight became large, and the system had to be quite complicated in terms of the device for moving the arm.

In particular, even if workers inspect, measure, and clean the low-temperature gas section ◎, they cannot do all of the work on the heat transfer tubes 7 due to the narrow spacing.

<Problem that the invention seeks to solve> The above conventional technology is for inspection and measurement in high-temperature gas sections.

Even if cleaning work could be mechanized, the overall system for equipment and T4 machines would be large, and for this reason, when installing each of these equipment and machines inside the boiler, it would require a diameter of approximately 500 mm.
Each of these devices and machines had to be taken in and out through manholes, and it took a lot of effort and time to set up inspection, measurement, and cleaning work. For this reason, in order to inspect, measure and clean all the heat transfer tube groups in the low temperature gas section It also took a lot of effort and time to set up the process.

<Objective of the Invention> The object of the present invention is to be able to easily carry out and carry in through a manhole with a diameter of about 500 mm without pre- and post-processing, and to enable inspection, measurement, and cleaning even for tubes between narrow groups of heat transfer tubes. The purpose of the present invention is to provide a mobile device capable of carrying out various activities.

Outline of means for moving> A moving device formed of a main body and a roller having spiral-shaped protrusions at the ends of a plurality of arms extending from the main body projecting from the cylindrical body surface and whose retraction is controlled; is located between the surfaces of the heat exchanger tube panels, and the roller is brought into contact with the heat exchanger tube so that the helical protrusion protrudes from the cylindrical body surface in a direction perpendicular to the axis of the heat exchanger tube, and when contact is made only on the cylindrical body surface, the tube axis This is a heat exchanger tube group moving device that includes a control box that controls the entry and exit of a helical protrusion that is displaced in a direction.

<Example 1> FIG. 5 is an overall perspective view of a heat exchanger tube cleaning inspection robot according to an example of the present invention. It consists of a heat exchanger tube cleaning inspection, measurement, and cleaning work unit 18. You can also connect power tool equipment.

Heat exchanger tube group moving machine ■417 has long shaft wheels 1a, lb.

2a, 2b, and a main body 4, the inspection, measurement, and cleaning unit 18 is moved in the axial direction (left, right direction) and downward direction of the heat transfer tube 7.

Note that the inspection, measurement, and cleaning unit 18 includes a rotating brush 18.
IILs scale collector 1tsb% contact sensor (inspection)
18c, vacuum cable 7' for scale removal 18d,
It is constituted by a power supply control table 18θ.

The moving mechanism 17 is carried into the furnace 9 through the manhole 19 and installed at the interval 14 between the heat exchanger tubes 7 and 7 groups, and is operated by operating the control panel 6 outside or inside the furnace to move the heat exchanger tubes 7 and 7 at intervals 14 as shown in FIG. 14 in the left-right direction and down the hill.

Hereinafter, the moving mechanism 17 changes the distance 14 between the heat exchanger tubes 7 from left to right,
We will explain how it moves northward.

Figure 1 (a) shows that the distance between the heat transfer tubes 7 and 7 is 1 when the transfer machine is purchased.
1(b) is a side view of FIG. 1(a) showing only the mobile groove. Figure 1 (C
) is a plan view of FIG. 1(a) and FIG. 1(1)).

As shown in FIGS. 1(a) to (C), the moving machine groove 17 has long shaft axles (rollers) la, 2a and long shaft wheels (rollers) lb.
, 2t), with long shaft wheels 12L and 2a.
is supported by the support mechanism 3a, and the shaft-long wheels 1b+2b are supported by the support mechanism 3a.
They are each supported by the main body 4 by N43b. 5
is an inspection mechanism, and 6 is an α control box.

Incidentally, the axial length flux 114=t a, '1 b, 2 a
, 2b's spiral protrusions 3a and 3b are shown in Fig. 1 (fL)
As shown in FIG. 7, spiral protrusions 8a and 8b are formed only when moving vertically through the interval 14 between the heat exchanger tubes 7.
Distance 14 of °7 in the left-right direction (left-right direction in Figure 1 (C))
When moving, the spiral protrusions 3a, 8b are not formed, and the surfaces become flat diagonal long wheels 1a, 1b2a, 2b. (The spiral protrusions 3a and 3b are formed by tensioning them with air pressure, etc., and when the air pressure is released, the first spiral protrusions 8a and 3b disappear and become a long diagonal wheel with a flat surface.) This mobile machine groove is i Front long wheels 1a, 2a and shaft length bundle Glb, 2
The long shaft wheels 1a, 2a and the long shaft bundles 41b, 2b in one set have grooves that allow the helical protrusions 8a, 3b to be inserted and removed, and the transmission wheels facing each other are provided. The heat exchanger tubes 7, 7 are pressed against the heat exchanger tubes 7, 7 by manipulating the rotational directions of the individual long support wheels 1a and 2a and the long axis bundles 1b and 2b and the insertion and removal of the helical protrusions 8a and 8b. 7 in the horizontal and vertical directions.

The movement principle is as follows.

The working pattern of this moving mechanism 17 is mainly in the direction in which the horizontal heat exchanger tubes 7 are arranged, that is, when moving horizontally, but in this system, when moving horizontally, the axial bundles @la, 1b, 2a, 2b do not have the spiral protrusions 8a, 8b. Long shaft wheels 1a, lb, 2
There is no vibration of a, 2b themselves, and unnecessary vibrations are not transmitted to the main body 4 where the inspection device 5 is located. (Vibration can be prevented) As mentioned above, the moving machine groove 17 of the present invention has the axial length bundle 41a,
11) and the shaft-long wheels 2a, 2b to move the heat exchanger tubes 7, 7 in the vertical and horizontal directions through the interval 14. First, the movement in the vertical direction will be explained with reference to Fig. 1 (a) and (C). do.

In addition, as mentioned above, when moving in the vertical direction, the spiral projection 8b is used for the shaft length axle 2ilL, and the spiral projection 8 is used for the shaft length axle 2ilL.
a are formed respectively.

First, a motor (not shown) built in the main body 4 drives all long shaft wheels 1a, i11+, 2a, 2b to the first
Apply clockwise rotational force as shown by the arrow in figure (C).

In other words, when a clockwise rotational force is applied to the axial bundles @t a, 1 b, 2a, and 2b, the axial bundles 441a and lb will move from the right in the figure if we only look at the horizontal movement in the plan view of Fig. 1(c). To the left, while the long-shaft wheels 2a and 2b try to move from the left to the right in the figure, but the rotational directions of the long-shaft wheel 1a and the long-shaft wheel @ 2a, and the long-shaft wheel 1b and the long-shaft wheel 2b are the same. Since it is a direction, the amount of horizontal movement in the left direction in the figure due to the axis length bundles mla and lb The amount of horizontal movement in the right direction in the figure due to the axis length types @2a and 2b are balanced, so the amount of movement is canceled out and the amount of movement is zero It becomes stationary.

In other words, as a result, the long shaft wheels 1a, lb and the long shaft wheels 2a,
The amount of horizontal movement of 2b disappears, and it becomes a mere rotational movement in a stationary position.

Therefore, in FIG. 1(C), the axial length flux @1a.

Even if lb, 2a, 2b are rotated clockwise, they do not move to the left or right in FIG. 1(C).

On the other hand, when a clockwise rotational force is applied to the long shaft wheels 1a, lb, 2a, 2b, the right-handed spiral protrusion 8a
, 3b, all the long shaft wheels 1alb, 2a, 2b climb upward along the interval 14 of the heat transfer tubes 7.

In other words, the right-handed spiral protrusion 8 is provided on the axle length vehicles 1a and lb.
b is a right-handed spiral protrusion 8a on the long shaft wheels 2a and 2b.
are formed respectively, and the axial bundles @la and lb are given clockwise rotation, and the axial bundles @2ay and 2b are also given clockwise rotation, so the axial bundles @la and lb are rotated clockwise and to the right. The axially long bundle @
2a, 2b as well, due to the clockwise rotational force and the right-handed spiral protrusion 8a, the axial bundles @la, 1b, 2a, 2b as a whole proceed only in the upward direction in FIG. 1(a).

In this way, by simply rotating the axial length bundles 4iar1a, tb, 22L, and 2b in the clockwise direction, the entire movement i1'j417 moves upward through the interval 14 between the heat exchanger tubes 7, 7, and toward the hill. On the other hand, when lowering the moving machine groove 17, if the long shaft wheels 1a, 1b, 2a, 2b are rotated counterclockwise in the opposite direction, the long shaft wheels 1a, 1b, 2a, 2b are rotated. It will be easily understood that the distance 14 between the heat exchanger tubes 7, 7 is moved downward by the rotational force of the heat exchanger tubes 7, 7 and the spiral protrusions 8a, 8b.

The above explanation is that the moving machine groove 17 is heat transfer
We have explained how to move upwards and downwards, but below,
A so-called horizontal movement in which the mover groove 17 moves in parallel (horizontally) with respect to the heat transfer tube 7 will be described.

In addition, when moving in the horizontal direction, use long shaft wheels 1a, l.
The right-handed spiral protrusions 8a, 3b of b, 2a, 2b disappear (they become flat rollers).When horizontally moving from right to left in the figure in Fig. 1 (0), the long shaft wheels 1a, lb By applying a clockwise rotational force to , and a counterclockwise rotational force to the long-axis wheels 2a and 2b, the long-axis wheel 1a is applied.

1b moves from right to left, and long shaft wheels 2a and 2b also move from right to left, that is, mobile machine f! The entire ¥17 goes from right to left in FIG. 1 (0) and moves to the left within the interval 14 between the heat transfer tubes 7.7. Further, in this case, when a set of annular protrusions corresponding to a tube pinch is provided, the device is supported by the tube and can move more stably from side to side.

On the other hand, when moving from the left to the right in Figure 1 (C) using reverse G, the rotational force in the counterclockwise direction is applied to the long shaft bundles @la and lb, and the rotation in the clockwise direction is applied to the long shaft wheels 2a and 2b. It will be understood that by applying the force, the entire mobile groove 17 moves from left to right in FIG. 1(C).

From the north, in the embodiment of the present invention, the long shaft wheels 1a, 2a,
Although the spiral projections 8a and 8b provided on lb and 2b have been described only in a right-handed manner, the spiral projections 82L and 8
b may be a left-handed one, the key is the shaft-long wheel i iIL,
], 'b, 2 a, 2 b spiral protrusion 3a,
8b may be wound in the same direction.

<Embodiment 2> FIG. 6 is a front view of a second embodiment of the present invention, and FIG. 7 is a side view. This shows the concept of an apparatus for moving the upper surface of a group of heat exchanger tube panels in the left-right direction in the drawing.

In this case, two sets of right-handed helical shaft long wheels and left-handed helical shaft long wheels are provided, which provides a stronger moving force than when the load is suspended from or with this device. .

<Example 3> The heat transfer surface that holds the moving device and the moving device FT! 15 will be explained.

The heat transfer surface and the mobile groove 15 are connected to the support mechanism 4 as shown in FIG.
Accordingly, the long shaft wheels 2a, 21), 3a.

3b is integrally constructed, the arm 16 is suspended, and the heat transfer surface moving machine F#15 straddles the heat transfer tubes 1, 1, and transfers the rotational force of the morph (not shown) to the long shaft wheels 2a, 2b, 3.
a and 3b, it moves in the axial direction (back and forth direction) of the heat exchanger tube 1 and in the direction across the heat exchanger tube 1 (left and right direction).

First, the case of moving in the left and right direction will be explained. When moving in the direction across the heat exchanger tube 1 (left-right direction), the long-shaft wheels 2a, 2bG have right-handed spiral protrusions 8a, 8a on the long-shaft wheels 3a, 3b, as shown in FIG. 1(a). Figure 1 (a
), left-handed spiral protrusions 8a and 8b are formed, respectively.

Then, clockwise rotational force is applied to the shaft length bases -2a and 2b.
When a counterclockwise rotational force is applied to the shaft length wheels 3a and 3b, the shaft length is changed! 1(a2a, 2b has a force trying to move from right to left in FIG. 1(a), and long shaft wheels 3a, 3b also have a force trying to move from right to left in FIG. 1(a). work.

Therefore, when a clockwise and counterclockwise rotational force is applied to the long-shaft wheels 22L, 2b and the long-shaft wheel 3a3b, respectively, the long-shaft wheels 2a, 2b move from right to left in FIG. 1(a). The force to
) from right to left, heat transfer surface J:
, moving mechanism] 5 moves from right to left in FIG. 1(a).

In this case, the axial movement 1d of the heat exchanger tube 1 due to the clockwise rotational force of the axial length bases 1 and 2b (movement from bottom to top in FIG. 1(a), +■), Movement i of the heat exchanger tube 1 in the axial direction due to the counterclockwise rotational force of the long wheels 3a and 3b
rl (the amount of movement downward from the point in FIG. 1(a)) is canceled out, and the movement of the heat exchanger tube 1 in the axial direction becomes zero, and as mentioned above, G is the amount of movement in FIG. 1(a). Moving only from the right to the left G. On the other hand, when moving the long shaft wheels 2a, 2b, 3a, 3b to the right in FIG. counterclockwise, the axis length is 1 m3
It will be understood that by reversing the rotation directions of a and 3b clockwise, the stone monument 15 moving on heat transfer σj moves from left to right in FIG. 1(a).

On the other hand, when moving the heat transfer surface and the moving device PIt15 along the axial direction (front and rear directions) of the heat transfer tube 1, the axial length base @2a
, 2b, 3a, and 3b, the right-handed spiral protrusion 8a and the left-handed spiral protrusion 8b are completely changed to the circular annular protrusion 7 shown in 2nd ta(0).

For example, if clockwise rotational force is applied to wheels 2a, 2b, 3a, and 3b with axial length, the axially long wheels 2a, 2b.

3a and 3b all move from the bottom to the hill in FIG. 1(a) (move in the axial direction of the heat exchanger tube 1).

On the other hand, if a counterclockwise rotational force is applied to the long-shaft wheels 2a, 2b, 3a, and 3b, the long-shaft wheels 2a, 2b
, 3a and 3b move completely downward from the north of FIG. 1(a).

In this way, by rotating the axis length bases IM2a, 2b, 3a, and 3b clockwise or counterclockwise, the heat transfer surface moving machine FIt15 moves in the E front direction (front, rear) of the heat transfer tube 1. direction).

<Operation> Figure 1 shows the structure of the mobile device layer. Code 1 a in Figure 1
, 1b, 2a, 2b are on the axis length].

These long shaft wheels 1a, 1b, 2a, 2b have helical projections 8a, 8b in the same direction, and these two long shaft wheels 1a, 2a and long shaft wheel 1b.

2b constitutes one set of moving structures. The long shaft wheels 1a, lb, 2a, 2b are pressed against the heat transfer tube 7 on their entire surfaces by support machines B 3a, 3b. When moving upward, as shown in Fig. 2, long shaft wheels 1a, 1b, 2a,
This is accomplished by protruding spiral protrusions 8a and 8b from 2b and applying rotational movement to it. In this case, the axial length base @l a,
1b, the spiral protrusions 8a and 8b of the IC are wound in the same direction. At this time, the resistance against falling is obtained by applying the spiral protrusions 8a and 8b to the heat exchanger tube 7, which also serve as claws against falling.

During horizontal movement, the spiral protrusions 82L, 81) are connected to the shaft-long wheels 1.
a, lb, 2a, 21) and long shaft wheel 1a
, l b, 2a, 2b have spiral protrusions 8a on their surfaces.
, 8b are absent. At this time, the resistance to falling is obtained by pressing the long shaft wheels 1 a, 1 b, 2 a, 2 b against the heat exchanger tube 7.

Code 4 is the axis length below m 1 aH1b l 2 a r
2b is fixed, a motor that generates driving force, etc. is delivered, and a rough inspection device 5 is attached to the main body. Controls such as the rotational direction of the movement and the insertion and removal of the spiral protrusions 8a and 8b are controlled by remote control from the control panel 6.

〈Effect〉 It does not require much effort or time, and the diameter of
It is easier to carry things in and out of the boiler than through a manhole with a diameter of about 0mm, and it is possible to carry out things that were difficult to reach.

[Brief explanation of the drawing]

Fig. 1 (a) (1)) (c) shows a side m and plane 2 showing a moving machine between heat exchanger tube groups according to the first embodiment of the present invention. ) Detailed enlarged view of the spiral protrusion of
FIG. 3 is a cross-sectional view of a boiler to which the present invention is applied, FIG. 4 is a detailed enlarged view of a part of the coils in the heat exchanger tube group in FIG. 3, FIG. 5 is an overall perspective view of a heat exchanger tube cleaning inspection robot, and FIG. FIG. 6 is a front view of an apparatus according to a second embodiment of the present invention, and FIG. 7 is a side view thereof. la, lb, 2a, 2b... Long shaft wheels (rollers) 3a, 3b... Arms (support mechanism) 4...
・Main body 5... Inspection 13J [6... Control box 7... Heat transfer tubes (heat transfer panels) 8a, 8
b... Spiral projection 14... Spacing (C) la, Ib, 2o, 2b Burning η゛Person flow direction Figure 6 Figure 7 ○ ○ ○ ○ ○ ○

Claims (1)

[Scope of Claims] 1. A moving device formed by a main body and a roller having spiral-shaped protrusions at the ends of a plurality of arms extending from the main body and whose retraction is controlled; When the moving device is located between the surfaces of the heat exchanger tube panels, the rollers are brought into contact with the heat exchanger tubes, the helical projections are made to protrude from the cylindrical surface, and the cylindrical surfaces are brought into contact in a direction perpendicular to the axis of the heat exchanger tubes. A heat exchanger tube group moving device comprising a control box that controls the entry and exit of a helical protrusion that is displaced in the tube axis direction. 2. Claims characterized in that means for hanging the moving device means from the device traveling on the upper surface of the heat exchanger tube group, and the moving device is provided with a connecting portion for attaching and detaching an inspection device, a cleaning device, and a working tool device. The heat exchanger tube group moving device according to item 1.