JPS6125746A - Pipe hole cleaner of supporting board for heat transmission tube in heatexchanger - Google Patents

Abstract

PURPOSE:To clean plural tube pipe holes full-automatically by constructing such that a plurality of shrinkable/rollable pipe cutting tools associated with dust sucking means are moved laterally and longitudinally while automatically controlled on a rail fixed to the supporting board of heat transmission tube. CONSTITUTION:9, 10 are fixed by utilizing the pipe hole of heat transmission tube supporting board 6 to secure the lateral rails 11, 14 and to secure the post 24 to the longitudinal rail. Then a cutting tool 73 is moved by step motor 40 for longitudinal travel with such sequence, direction, movement and speed as programmed in a computer thus to deburr the tube hole 7 and to clean the spatter then discharge through a nozzle by means of a vacuum source not shown connected to the cutting tool 73. With such arrangement, plural tube holes can be cleaned automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning machine for cleaning tube holes in support plates of heat exchanger tubes such as heat exchangers, and in particular, simplifies the method of sorting tube holes that should be cleaned with a cutting tool, and cleans the holes caused by cutting. The present invention relates to a cleaning machine that cleans a plurality of pipe holes at the same time by automatic control, and has the ability to completely collect dust and handle errors in pipe hole pitch.

[Prior art]

FIG. 7 shows a side view of a heat exchanger to which the present invention is applied.

It consists of a body part 1 and a head part 2, and the body part 1 is installed on a foundation 3. A large number of heat exchanger tubes 5 are arranged horizontally between tube plates 4 provided at both ends of the body 1, and these heat exchanger tubes 5 are supported at their intermediate portions by a plurality of support plates 6. .

FIG. 8 shows a front view as seen from arrows 1 and 2 in FIG.

A large number of tube holes 7 are opened in the support plate 6 in a staggered or cross-cut pattern, and the heat exchanger tubes 5 are inserted and supported.

Although the pitch of the tube holes 7 is constant, the distribution of the openings is not uniform on the support plate, and there are portions where no openings are made at the periphery and even at the center.

Conventionally, in general, after cutting the pipe holes 7 of the support plate 6, the support plates were fixed at intervals, and a person entered between each support plate and finished each hole one by one using an air grinder, etc. The burrs, spatter, etc. remaining around the area were removed. However, finishing work in a confined environment requires
Occupational health standards were not good and efficiency was poor.

Furthermore, the distribution of the pore openings is not uniform.

In order to simplify the automatic side #, it is desirable that the cutting tool be retracted in the unopened area.

Furthermore, it is desirable that the cutting tool be able to swing in response to errors in the pitch of the tube holes. Furthermore, in order to adjust the outer diameter of the cutting tool, it is necessary to provide the cutting tool with a suction function.

[Purpose of the invention]

An object of the present invention is to eliminate the drawbacks of the prior art, and to provide a plurality of cutting tools for cleaning pipe holes under automatic control by running in four rows or laterally on a rail fixed to a part of a support plate of a heat exchanger. and a dust suction mechanism.

[Key points of the invention]

This invention moves vertically or horizontally on a rail fixed to a part of the support plate of a heat exchanger tube under automatic control,
It is composed of a plurality of extensible and retractable cutting tools that enter the pipe hole to cut and remove dust by suction.

[Embodiments of the Invention] Fig. 1 is a side view of an embodiment of the g-hole cleaner for a heat exchanger heat exchanger tube support plate according to the present invention, Fig. 2 is a stop view, and Fig. 3 is a view of Fig. 2. ■-■ Expanded cross-sectional view in the direction of the arrows, Figure 4 is the ■-■ of Figure 3.
5 is a sectional view taken along arrows 1V-IV in FIG. 4,
FIG. 6 shows a sectional view taken along the line V--■ in FIG. 4.

This machine is installed between support plates 6 of heat exchanger tubes 5 of a heat exchanger, and is fixed to support plates 6 having target tube holes 7. A beam IO is passed through the soil of a bracket 9 fixed to the top of the support plate 6 by bolts 8, and a transverse rail 1 is placed on top of this beam 10.
] is fixed.

A transverse rail 14 is fixed on a bracket 13 fixed to the lower part of the support plate 6 by a portco 2.

Brackets 15 are fixed to both ends of the beam 10, and bearings 16' (
il- is attached and supports the spindle 17 between the bearings 16. One end of the spindle 17 is connected to a stepping motor 18.

The transverse frame 20 includes guide shoes 21 and 22, an upper frame 23, and an upper frame 23. Post 24. It is composed of a lower frame 25, each of which can be disassembled. Above the post 24 is the vertical rail 2.
Fix 6.

A bracket 27 is fixed to the upper frame 23.

Turn the nut 28 that engages with the screw of the spindle 17 and
It is fixed via the L-eye 29.

The vertical frame 30 straddles between the vertical rails 26, and the frame 33 is fixed to a bracket 32 that fixes the vertically extending sky 1-31 with the vertical rail 7126 in between. An Ayan cylinder 34 is fixed at the center of the frame 33, and a pair of guide shafts 36 are fixed above and below it via bearings 37. A pin 38 is completely passed through the upper bracket 32 to fix one end of a chino 39.

A vertical stepping motor 40 is fixed to the upper frame 23 of the transverse frame 20, and a sprocket wheel 42 is fixed to the motor shaft 41. do. ! 71/-mu 23
Sprocket) foil 43 f lAj 9 and stretch Naen 4.1 between them.

The sprocket wheel 4 has two rows of teeth, one end of a chino 45 is fixed to the second row of teeth, and the other end is fixed to the bracket 32 of the vertical frame.

The sprocket wheels 4 and 3 have two rows of teeth, and the second row of teeth has a chino 46 slope of 25", and the other @, I'Z +
7': 'I'1 to the weight 47 r"-j that descends inside the hollow cross section of 24. The weight sends power to the weight 47 r"-j.

Air/Lifter 1・'”...--No 1/Rono i' 3
5:;', i゛Mekite/Yafuto 30'-if'' (
Dimension 4. Ido) 1/ノ, 48. ) Fix it on the C side. 4f
Set the 11 gear caning 49 on the 1-1.48 side (!'!, 7).

-61 of moving frame 48 is Eya-! 5 ()i
Fix it. Shaft 5 of air motor 50] Ketsu spring 52
It is connected to the gear 53 by. The gear 53 is fixed to the gear casing 49 by a housing 55 via a bearing 54. The coupling 56 rotates together with the gear 53 via a key 57 and is supported by a casing 59 via a bearing 58.

One end of the casing 59 is screwed and fixed to the gear casing 49. Coupling 56 supports spring 60. The spindle 61 has a hollow cross section. The bearing 64 is supported by a casing 68 via a spring 67, and the casing 68 is fixed to a casing 69.

The spindle 61 can therefore be retracted by longitudinally compressing the spring 60. Further, the spindle 61 can be swung in the radial direction by the radial contraction of the spring 67, and is structured to be able to cope with some errors in the pitch of the tube holes 7. The rear end of the camp ring 65 is in contact with the front end of the coupling 56 and is slidable in the radial direction.

A dust hood 72 is fixed to the stepped portion of the spindle 61 via the Entoso L/- door 0 and a retaining ring 71.

The cutting tool 73 is fitted onto the outer periphery of the spindle 61.

The cutting tool 73 is fixed by screwing the cutting tool guide 74 onto the spindle 61. The retaining ring 71 and the cutting tool kite 74 each have grooves 7]A.The outer diameter of the cutting tool 73 tends to be smaller than the inner diameter of the tube diameter 7, and for this purpose, the spindle 61 is swung in the radial direction as described above. Cutting is possible by means of a grinding motion. A bearing 7 supported by a cutting tool guide 74 is provided at the tip of the spindle 61.
A fixed head 76 is held between the two.

The rotation of the spindle 61 is controlled by the gear 53. Key 57° Coupling 56. Pin 66, coupling 65° sliding key 63
It is conveyed through the process.

When the 34 piston rod 35 of the air/ring moves forward, the fixed head 76 comes into contact with the support plate 6 in the portion of the support plate 6 where the tube hole 7 is not open.

This is because it is suitable for easily performing automatic control by automatically protecting the spindle 61 by compressing the spring 60. Gear casing 49 has gear 53
A, 53B, 53C and 53D are interlocked and arranged, and each spindle 6+A, 61B, 61C and 61D, cutting tool 7,'' (A, 73 B, 7
, ”, C and 731), Cutting Tool Chi Puff I A
, 74 B, 74 C and 7, s i) - r:) 3. Tastco - Suction is carried out using the nozzle 77 attached to the rear of each spindle as shown in Fig. 3. Kikomu ＼ ivy 78 ni ba * neem ho x 79t [[line with 7")
. The dust is sucked into the hollow part 61A of the spindle 61 through the gap between the dust hood 72 and the cutting tool 73, and the nozzle 77,
It is sucked through the vacuum header 78° and the vacuum hose 79.

Next, the driving method will be explained.

After the brackets 9 and 13 are fixed using the tube holes 7 of the support plate 6, this machine is automatically operated under the control of a predetermined computer program.

That is, the order, direction, movement amount, speed, etc. of the operation are all stored as numerical information, and the cleaning work is automatically performed according to the instructions.

The transverse and longitudinal movements are performed by the stepping motors 18 and 40, respectively, while rotating by a fixed angle and remaining stationary each time a Norse voltage is applied.

The forward and backward movement of the pipe hole 7'\ of the cutting tool 73 is carried out by the air cylinder 34.
This is done by moving the piston rod 35 back and forth.

At this time, the guide/gift 36 will guide you.

To clean burrs, spatter, etc. in the tube hole 7, a nozzle 77 attached to the rear end of each spindle is connected to a vacuum header 78, and a vacuum hose 79 is connected to the vacuum header 78 to perform suction and cleaning.

[Modifications and application examples of the invention]

By changing the shape of the cutting tool, it can be used not only for cleaning pipe holes but also for chamfering, etc. Also the rampant rail,
The arrangement of the vertical rails, the horizontal frames, and the vertical frames, and the combination of fixing methods are not limited to the embodiments, and the vertical rails may be directly fixed to the support plate.

The longitudinal mechanism may be a combination of a spindle and a NAND without using the chain 7. Also, a modification such as blowing it away towards a vacuum hoe is also possible.

〔Effect of the invention〕

A pipe hole cleaning machine for a heat exchanger heat exchanger tube support plate according to the present invention includes a frame that can move forward and backward with respect to the tube holes of a heat exchanger tube support plate of a heat exchanger, and a plurality of frames fixed to the frame that can extend and contract. The structure consists of a rotating shaft, a cutting tool fixed to the rotating shaft, a dust suction mechanism passing through the rotating shaft, a longitudinal mechanism and a transverse mechanism of the frame, and an automatic control mechanism for the same, so it can be cleaned efficiently. The automatic control mechanism is simplified by adjusting the unopened portion of the tube hole by the expansion and contraction movement of the rotation axis, and the error in the tube hole pitch is handled by the swinging movement of the rotation axis.

Even if the outer diameter of the cutting tool is made smaller than the inner diameter of the tube hole, excellent effects such as the ability to easily cut the tube hole through the cutting motion can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of a tube hole cleaning machine for a heat exchanger tube support plate according to the present invention, Fig. 2 is a front view, and Fig. 3 is an enlarged cross section taken along the line II-II in Fig. 2. Figure 4 is the ■ of Figure 3.
5 is a sectional view taken along M-IV in FIG. 4, FIG. 6 is a sectional view taken along v-■ in FIG. 4, and FIG. 7 is a heat exchanger to which this invention is applied. Side view of the vessel, Figure 8 is the same as ■- in Figure 7.
■Shows a front view in the direction of arrows. 5... Heat exchanger tube 6... Support plate 7... Tube
Holes 11, 14...Transverse rail 17...Spindle 18...Stepping motor 20.
・・Transverse frame 24・Post 26・Vertical rail 30・Frame 33・・Frame
34...Air cylinder 35...Piston rod
36...Guide shaft 39...Che 7
40... Stepping motor 48... Moving frame 49... Gear casing 50... Air motor
53... Gear 56... Coupling 60.
...Spring 61...Spindle 65...
Campling 67...Spring. Figure 1 Figure 2

Claims (1)

[Claims] 1. A movable frame that can move forward and backward with respect to the tube holes of the heat exchanger tube support plate of the heat exchanger, a plurality of rotary shafts that are fixed to the movable frame and that can extend and contract, and a cutting tool that is fixed to the rotary shafts. A pipe hole cleaning machine for a heat exchanger heat transfer tube support plate, comprising: a dust suction mechanism penetrating the rotating shaft; a longitudinal mechanism and a transverse mechanism of the moving frame; and an automatic control mechanism thereof.