JPS6014658B2 - Pipe insertion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tube insertion device, more specifically, for example, in a shell-and-tube heat exchanger, heat exchange tubes (hereinafter referred to as , a tube).

Conventionally, in manufacturing the heat exchanger described above, inserting the tubes into the through holes of the tube sheet and the intermediate plate has mainly been done manually.

For this reason, conventional tube insertion work is inefficient, especially when inserting several thousand long tubes several meters long.
The disadvantage is that it requires a lot of effort and time.

Therefore, a machine that automates the tube insertion work has been proposed, for example, in Japanese Patent Publication No. 52-16582. With this device, the tube is inserted by reciprocating movement of the tube pusher, so it can be inserted in a shorter time than manually, but the tube is guided by guide rollers on the support stand. Therefore, if some of the tubes are caught in the through holes of the heat exchanger, the reaction force causes the tubes to jump upward from the guide rollers and buckle. In addition, there is a problem that the pusher is damaged by excessive force, and the result is still unsatisfactory. In particular, when the tube is made of titanium steel, the economic loss is also large. The present invention has been made in view of the above-mentioned conventional drawbacks, and it prevents damage to the pusher and buckling of the tube, and also efficiently inserts the tube into the tube plate of a heat exchanger in a short time by moving the pusher. The present invention aims to provide a tube insertion device that can be used. Next, the present invention will be explained with reference to the accompanying drawings, which are one embodiment of the present invention.

FIG. 1 shows a tube insertion device 1 according to the present invention.
is composed of a base 2, a gate-shaped pusher 3 movably provided on the upper surface of the base 2, and a guide means 27.

The operation is generally such that a plurality of tubes arranged on the guide means 27 are pushed by a tube feeder and an arm (not shown) with the claws of the portal pusher 3, which is advanced by a drive device, and the tubes of the heat exchanger are pressed. It is inserted into through holes provided in the plate and intermediate plate. The gate-type pusher 3 is shown in FIGS. 2 to 5.
As shown in the figure, it consists of a truck 5 that runs on wheels 6 on the rails 4, 4 of the base 2, and a pushing head part 7, and is driven by a chain 9 to the first It is movable in the left and right directions in the figure.

Note that the travel drive unit 8 may be configured to be able to switch the speed of the gate-shaped busher 3 between high speed and low speed as necessary. The pushing head section 7 is attached to the front of the truck 5 by a shilling 1
0 through rollers 11 so as to be able to move slightly in the horizontal direction, that is, in the width direction of the base 2. Further, the pushing head section 7 is composed of a cylinder 13 and a plurality of pushing heads 12 having claws 14 at the tips, and the pushing head 12 is attached to the base plate 15 of the pushing head section 7.
As shown in FIG. 5, the pawl 14 is trifurcated in the embodiment. The spacing between the claws 14 is the same pitch P as the through holes provided in the tube plate of the heat exchanger, and the width thereof is 4 cm from the width of the groove opening of the guide means 27 described below. . Further, the pawl 14 is rotatably attached to the tip of the pushing head 12 via a ratchet 16, and a recess 17 is provided on its upper surface. On the other hand, upper and lower push rods 19 and 20 are provided inside the push head 12 via a spring 18 so as to be movable up and down, and a roller 21 is rotatably supported on the lower surface of the lower push rod 20.

Due to the force of the spring 18, the roller 2 of the lower push rod 20
1 is pressed into the recess 17 provided on the upper surface of the claw 14 to stop the rotation of the claw 14, and when a predetermined force or more is applied to the tip of the claw 14, the claw 14 is rotated backward. It is designed to move. Note that the rotation of the pawl 14 is regarded as the vertical movement of the lower push rod 20 based on the rotation, and this is detected by a detection means (not shown) such as a limit switch, and the cylinder 13 is operated based on this detection signal. The claw 14 is raised. Above the upper pusher rod 19, an eccentric shaft 23 is rotatably provided on the pusher head 12 via a bearing 22, and a bearing 24 provided at an intermediate eccentric portion of the eccentric shaft 23 supports the upper surface of the upper pusher 19. ing. Therefore, by rotating the eccentric shaft 23, the upper pusher 19 is pressed by the bearing 24, and the force of the spring 18 is adjusted. In addition, 25 indicates each of the above cylinders 10,
13 is an air tank for operating, and 26 is a guide roller. As shown in FIG. 6, the guide means 27 provided on the upper surface of the base 2 includes a fixed guide 29 and a rotary guide 30 placed on the upper surface of a rectangular base frame 28 at a predetermined distance from each other in the width direction. The configuration is such that a large number of them are provided in parallel.

As shown in FIGS. 7 and 8, the base frame 28 is movable in the width direction by a cylinder 32 on the upper surface of the base 2 via wheels 31. As shown in FIGS.

Note that the cylinder 32 is provided with a potentioner 33 to detect the amount of movement of the base frame 28 (the amount of movement of the cylinder 32). On the upper surface of the fixed guide 29,
As shown in FIGS. 7 and 9, a plurality of guide plates 35, each having grooves 36 on the upper surface at the same pitch P as the through-holes provided in the heat exchanger tube plate, are detachably attached using fixing pins 34. It is being

On the other hand, as shown in FIGS. 10 to 13, the rotation guide 3 has a bolt 3 attached to the upper surface of the tubular frame 37 having a rectangular cross section.
A guide plate 39 having a large number of guide moats 40 that can be freely laid out at a pitch P equal to the through holes of the heat exchanger is removably provided on the upper surface of the guide plate 39 through holes 8 . As shown in FIG. 14A, this guide rod 40 has a curved surface that forms a U-shaped tube guide groove 41 with adjacent guide rods 40 and 40, and a guide rod 40 that is 90 degrees from the illustrated state. When rotated, the opposing surfaces (FIG. 14B) form a substantially o-shaped tube guide portion 42. Further, a rotary pivot 43 is horizontally provided in the intermediate portion of the guide rod 40, and its tip protrudes outward through a through groove 44 provided on the side surface of the guide plate 39.

Furthermore, as shown in FIG. 13, a roller 4 is connected to a shaft 46 via a bearing 45 on the lower end side surface of the guide plate 39.
7 is rotatably provided, and a slide rod 48 having a rectangular cross section is provided on the upper surface of the roller 47 so as to be movable in the horizontal direction. A disk 50 is provided on the upper surface of the slide foundation 48 via a screw shaft 49 at the same pitch P as the guide rod 40, and between these disks 50, a guide rod 40' is provided. Pins 43 are located respectively. and,
A cylinder 51 is provided on the upper surface of the frame 37,
A flange 54 of a shaft 53 connected to the piston rod 52 of the cylinder 51 engages with a bracket 55 provided on the side surface of the slide arm 48.

Therefore, when the cylinder 51 is driven, the slide rod 48 moves horizontally on the roller 47, and the disk 501 causes the rotation pin 43 to rotate around the guide bar 40.
As a result, the guide rod 40 rotates approximately 90 degrees. Next, a method of using the above-mentioned slow-release tube insertion device 1 will be explained. In FIG. 1, the base 2 is raised to a height equal to the top hole of a heat exchanger (not shown) by a lifting device (not shown), and the gate-shaped pusher 3 is moved by a chain 9 by a travel drive unit 8 (as shown in the figure). It shows the state of retreating to the left end.

In this state, the tubes 56 are stacked one by one in the groove 36 and the guide groove 41 formed by the fixed guide 29 and the rotary guide 30 on the guide means 27 using a tube supply device (not shown).

Next, when the tubes 56 are aligned on the guide means 27, the guide rod 40 is rotated by the cylinder 51 of the rotary guide 30, and the tubes 56 are aligned with the concave groove 36 of the fixed guide 29 and the rotary guide 30. They are held at predetermined intervals by the O-shaped tube guide section 42.

Then, the gate-shaped pusher 3 moves forward by the traveling drive unit 8, and each tube 56 is pressed by the claw 14 of the pushing head unit 7 provided on the front side, and the tube 56 is guided by the guide means 27 while exchanging heat. Inserted into through holes in the organ plate and intermediate plate.

When the insertion of the tube 56 is completed, the gate-type pusher 3 is moved back by the traveling drive unit 8 and returns to its original state, and the base 2 is moved down one pitch to the position of the next stage hole of the heat exchanger. Thereafter, the above operation is repeated to automatically insert the tubes 56 into each hole of the heat exchanger. Incidentally, since the arrangement of the tube insertion holes is determined in advance, it goes without saying that each of the cylinders and the like is driven according to a program. Further, in the tube insertion process, if a part of the tube 56 gets caught in the hole, the tube 56 will not jump up because it is held by the approximately o-shaped tube guide portion 42 of the rotation guide 30.

Further, when a force exceeding a predetermined level is applied to the tip of the claw 14, the claw 14 rotates backward about the shaft 16 against the force of the spring 18, and this is detected by the detection means and the sill 13 is rotated. Pull the claw 14 upward. That is, the insertion of the tubes 56 (in the embodiment, three adjacent tubes) is stopped and only the remaining tubes 56 are inserted to prevent breakage of the tubes 56 and the claws 14. In addition, in the above embodiment, the guide means 2
Although the fixed guide 29 and the rotating guide 30 are provided on the fixed guide 29 and the rotary guide 30 are shown, the fixed guide 29 and the rotating guide 30 are not limited to this.
Only the rotation guide 30 may be provided without providing the rotation guide 9. Furthermore, in the above description, the guide plate 35 having a large number of grooves 36 is detachably attached to the fixed guide 29, but the guide plate 35 is composed of a fixed guide section 35a shown in FIG. Good too.

That is, the guide member 35a is assembled by welding a shaft 581 whose both ends are supported by bearings 57 and a dish plate 59 which has been pressed into a rectangular shape so as to form a concave groove 36, and this assembly is attached to the shaft 58. Both ends are tightened and fixed with washers 60 and nuts 61. Then, the bearing 57 of the guide member 35a is attached to a frame (not shown) or the like, and then attached to the fixed guide 29 via the frame.

In this way, when inserting the tube 56, the shaft 58 can be prevented from rotating due to frictional force and the tube 56 can be prevented from being damaged.

As is clear from the above description, according to the present invention, the plurality of tubes arranged in an aligned layer on the guide section are pushed by the claws by the movement of the gate-shaped pusher, so that the process can be carried out very easily and automatically. The tube can be inserted into a hole in a heat exchanger or the like.

Moreover, since the tube is held in the roughly ○-shaped tube guide part of the guide rod, even if some of the tubes get caught in the holes of the heat exchanger, etc. when inserting the tubes, the tubes will not jump up like in the past. This prevents the tube from buckling.Also, when a force exceeding a certain level is applied to the tip of the claw, the claw rotates against the force of the spring, preventing breakage of the claw and the tube. It can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a tube insertion device according to the present invention, and FIG.
The figure is an enlarged side view showing the gate-type pusher in Figure 1, Figure 3 is a plan view showing the main parts of the gate-type pusher, and Figure 4 is the second
FIG. 5 is an enlarged sectional view showing the pushing head of the gate-type pusher in FIG. 4, FIG. 6 is a plan view showing the guide part in FIG. - Skin line enlarged sectional view, Figure 8 is the individual wind line enlarged sectional view of Figure 6, Figure 9
The figure is an enlarged side view showing the guide plate in Figure 7, and Figure 10.
The figure is an enlarged side view showing the rotation guide in Figure 6.
Fig. 1 is a plan view of Fig. 10, Fig. 12 is an enlarged sectional view of the plate line in Fig. 10, and Fig. 13 is a cross section taken along the line Xm-Xm showing the state in which the guide rod in Fig. 12 has been rotated 9 degrees. Figure 14A
Figures 14B and 14B are side views showing a state in which the guide rods in Figure 9 rotate to form guide grooves and tube guide sections between adjacent guide rods, and Figure 15 is a partial cross section showing a modified example of the fixed guide. It is a front view. 1-tube insertion device, 2-base, 3-portal pusher, 13-
Cylinder, 14 - claw, 18 - spring, 27 - guide means, 40 - guide, 41 - guide hawk, 42 - pipe guide section, 56 - pipe, P - pitch. Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 Fig. 10 Fig. 11 Fig.

Claims (1)

[Claims] 1. A base, and a plurality of guide rods are rotatably set up on the base at a predetermined pitch, and the shape of the guide rods is approximately U-shaped in which a tube is inserted and held from above on the opposing surface of the adjacent guide rods. By rotating the guide rod by a predetermined angle by a rotation mechanism, a substantially o-shaped tube guide portion is formed on each opposing surface to prevent the held tube from slipping upward. A guide that moves on the base and is held on the guide moves forward in the axial direction, and uses the force of a spring to rotate when a predetermined force or more is applied to the tip. A tube insertion device comprising: a gate-type pusher having a large number of claws corresponding to each of the stopped tubes.