JPS5862012A - Apparatus for heating heat-shrinkable sleeve for covering pipe - 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 The present invention relates to a tube-covering heat-shrinkable sleeve heating device that heat-shrinks a heat-shrinkable sleeve around the outer periphery of a pipe.

Recently, when welding steel pipes with anti-corrosion layers one after another to form 9 Igline, each bare welded joint was covered with heat-shrinkable material, and this was heat-shrinked to form each The welded joints are sequentially subjected to anti-corrosion treatment. In this case, conventionally, a ring-shaped heater was assembled and attached to the outer periphery of the heat-shrinking sleeve at the position where the heat-shrinking sleeve was to be heat-shrinked, so that the heat-shrinking work could be completed.

However, such a heating device has disadvantages in that it requires a lot of effort to assemble and disassemble, and work efficiency suffers.

An object of the present invention is to provide a tube-coated heat-shrinkable sleeve heating device that can efficiently perform heat-shrinkable sleeve fC) heat-shrinking work without much effort.

The tube coating heat-shrinkable sleeve heating device according to the present invention includes a truck that runs on the upper surface of the tube, and a rounded truck that is supported by the truck and that surrounds and heat-shrinks the heat-shrinkable sleeve on the outer periphery of the tube. The ring-shaped heater includes a ring-shaped heater and a truck fixing device for preventing the truck from moving*1 when heating the heat-shrinkable sleeve, and the ring-shaped heater is arranged to prevent the truck from moving between the front wheels and the rear wheels of the truck. The t-S mold is supported by a frame.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show a first embodiment of the present invention. As shown in FIG. 1, pipes 1 with anti-corrosion layers are successively connected at welded joints 2 to make them longer. A heat shrinkable sleeve 3 is disposed around the outer periphery of each welded joint 2 so as to surround it.

A heating device 4 for heating and shrinking the heat-shrinkable sleeve 3 includes a trolley 5 that rides on the tube 1 and a trolley 5 that runs on the tube 1.
supported by tube 1. a ring-shaped heater 6 for surrounding the heat-shrinkable sleeve 3 on the outer periphery of the heat-shrinkable sleeve 3 to heat-shrink it; and a jack 7 as a trolley fixing device for preventing the trolley 5 from moving when the heat-shrinkable sleeve 3 is heated. It is organized in advance.

The trolley 5 includes a frame 8 that hangs and supports a ring heater 6 on the front side, a pair of left and right front wheels 9 supported by a frame 80 portion in front of the ring heater 6, and a ring heater 6. It consists of a pair of left and right rear wheels 1° supported by the foot 8 at the rear. The front wheel 9 has its legs 9A fixed to the frame 8. The legs 10A of the rear wheel 1o slide in the longitudinal direction of the frame 8, so that the mounting position can be changed from position A to position B, or from position B to position A. It is fixed to the frame 8 with a fixing tool 10B such as a screw at the position.

The distance L1 between the A position and the B position is selected to be larger than the length Lb of the heat shrinkable tool 3. Jyatsuki 7Fi,
The rear end of the frame 8 is supported at the center of the bulge and ji portion 8A, and the middle 7 is a male screw 7B that is screwed into the female thread cylinder 7A, and is rotated by the handle 7C. j- It is possible to move the power door D at the lower end of the male thread 7B away from the surface of the tube 1 which has been brought into contact with the surface of the tube 1 by raising and lowering it.

Such a heating device 4 can be used for shirt-? 7 pa, door Df
The ring-shaped heater 6t is placed on the upper surface of the tube 1 and moved while being separated from the tube 1, and the ring-shaped heater 6t is carried to the position of the welded joint 2 by the movement of the truck 5, and the welded joint 2 is moved.
is positioned on the outer periphery of the heat-shrinkable sleeve 3 surrounding it.

In this state, operate the jack 7 to bring the pad 7D into contact with the top surface of the pipe 1 and lift the rear of the truck 5. When the rear wheel 1 is lifted from the pipe 1, the rear wheel 1° is lifted from the tube 1, and the pad 7D is brought into contact with the upper surface of the pipe 1. Movement is prevented. With the carriage 5 prevented from moving in this way, the ring-shaped heater 6 is energized to generate heat.
The heat-shrinkable sleeve 3 is heated and shrunk to form a dense layer around the outer periphery of the tube 1, centering on the welded joint 2.

Heat shrink like this! After the heat shrinkage of j-f3 is completed, the heating device 4 is moved to the next welding joint 2. At this time, if the rear wheel 10 attempts to pass over the softened heat-shrinkable sleeve f3, the heat-shrinkable sleeve 9-f3 will be damaged by the rear wheel IO. In order to avoid this, in this embodiment, as shown in FIG. 7
With the rear part of the truck 5 lifted up and the rear wheel 10 lifted from the pipe 1, loosen the screw as the fixture 10B and move the rear wheel 10 from position A near the ring-shaped heater 6 as shown in the figure. Using the frame 8 as a guide, slide the frame 8 to position B, which is close to
- fixed to frame 8;

Next, ja, j? 7 as shown in Figure 4.
Separate the base 7D from the pipe 1, lower the rear part of the frame 8 to return it to the horizontal position, and lower the rear wheel 10f onto the pipe 1.

When this state is reached, push the trolley 5 and move the trolley 5 to the right in the drawing (direction of the next welded joint 2) as shown in FIG.
and stop just before the rear wheel 1o gets on the heat shrinkable sleeve 3. In this position, as shown in FIG.
i1 and move the rear wheel 10 from position B to position A using the frame 8 as a guide. With this operation, the rear wheel 10 rides over the heat-shrinkable sleeve 3 that is in a softened state without coming into contact with it. Thereafter, the rear wheel 10 is fixed to the frame 8 with the fixture 10B, and the jack 7 is operated to raise the pad 7D and lower the rear wheel 10 onto the tube 1, as shown in FIG. When this state is reached, move the heating device 4 to the next welding joint 2 position by pushing the trolley 5t to the right in the drawing. It can be moved. Also, when moving, the wheels do not ride on the softened heat-shrinkable sleeve f3, and the heat-shrinkable sleeve 3 is not damaged.

Note that the rear wheel 10 is in position B from the beginning, and the rear wheel 10 is
The rear part of the truck 5 may be lifted up and the heat-shrinkable sleeve 3 may be moved to the A position as far as the rear wheel 10 will jump, and then returned to the B position after the rear wheel 10 has jumped.

8 to 11 show a second embodiment of the present invention. The heating device 4 of this embodiment includes a truck 5 that rides on a pipe 1 and is supported by the truck 5. A ring-shaped heater 6 surrounds the outer periphery of the heat-shrinkable sleeve 3 and heat-shrinks the heat-shrinkable tube 3; 7.

−? 7 is similar to the first embodiment. This embodiment is characterized by the structure of the truck 5. That is, the trolley 5ti of this embodiment, a frame 8 from which a ring-shaped heater 6 is suspended and supported on the front side, and a pair of left and right front wheels 9 supported by a portion of the frame 8 in front of the ring-shaped heater 6. A pair of left and right rear wheels 101 and a second rear wheel 10 are supported on a portion of the frame 80 behind the ring-shaped heater 6 with an interval tl in the front and back. It consists of. 1st rear wheel 10 and #p12 rear wheel 10. The distance between the heat-shrinkable sleeve 3 and the heat-shrinkable sleeve 3 is selected to be larger than the length Lb of the heat-shrinkable sleeve 3, so that the first and second rear wheels 10t and 10m can move over the heat-shrinkable sleeve 3 without any problem. ing. 1st.
Second rear wheel 1.0s, 10 dew legs 10A! .

10AI is supported by the frame 8 via hinges 10Ct and 10C*, and the second rear wheel to1.1o1 can be separated from the tube 1 by bending the legs 10A1.10Am.

In such a heating device 4, when heat-shrinking the heat-shrinkable sleeve 3, the rear part of the trolley 5 is opened with a lift door as shown in FIG. 9, and the first and second wheels 10 are ．． ．． The ring-shaped heater 6 is energized to generate heat while floating the 10-tonne from the tube 1 and preventing the carriage 5 from moving, thereby heating and shrinking the heat-shrinkable sleeve 3. After heating and shrinking, operate the jack 7 to raise the pad 7D to the first position. Lower the second rear wheel 101110m, and as shown in FIG.
0C1, and with the first rear wheel 101 floating from the pipe 1, push the trolley 5 to the right in FIG. 10 (toward the next welded joint) to move the heating device 4. At this time, the GT rear wheel 101 jumps over the heat-shrinkable sleeve 3 without contacting it, thereby avoiding damaging the heat-shrinkable sleeve 3 in a softened state.

When the first rear wheel 10 jumps over the heat shrink sleeve 3,
As shown in FIG. 11, return the leg 10A straight,
Lower the first rear wheel 101 onto the pipe 1, then bend the leg 10A of the second rear wheel 10m at its hinge 1001, and
Carriage 5t-1 with rear wheel 10 floating from pipe 1
Push to the right in Figure 1 to move the heating device to the next working position. At this time, the second rear wheel 10. jumps over the heat-shrinkable sleeve 3 without contacting it. The 10m second rear wheel is heat-shrinkable! If you jump over J-f3, that 11910Af
i back straight and lower the second rear wheel 103 onto the tube 1.

In this embodiment, only one second rear wheel 101 may be attached to the center of the ridge portion 8A of the frame 8.

Also, 1st. In the second embodiment, it is preferable that the ring-shaped heater 6 is divided into two parts, for example, in the center in the vertical direction.Furthermore, the ring-shaped heater 6 can be divided into two parts, for example, in the center in the vertical direction. It may also be something that is fixed in place.

As described above, according to the tube intermittently coated heat shrinkable sleeve heating device according to the present invention, when sequentially heating the heat shrinkable sleeve f that is intermittently coated on the tube, the heating position of the heating device By moving the heating device from one heating device to the next heating position along the tube without disassembling the heating device, heating and shrinking work can be carried out efficiently and without any hassle.

Furthermore, in the present invention, the trolley that transports the ring-shaped heater is equipped with a trolley fixing device (for example, a jack), which prevents the trolley from moving during heating. You can make it happen.

[Brief explanation of the drawing]

Figures 1 and 2: Side and rear views of the first embodiment of the heating device according to Shamoto Komei in use, Figures 3 to 7
8 and 9 are plan views and cross-sectional views of the heating device according to the second embodiment of the present invention in use, The figure is the second
Operation of the heating device of the embodiment Wit#! This is diagram A. DESCRIPTION OF SYMBOLS 1... Pipe, 2... Welding connection part, 3... Heat shrink sleeve, 4... Heating device, 5... Cart, 6... Ring-shaped heater, 7... Jacket, 8 ...Frame, 9
...front wheel, 9 a...leg, 10...rear wheel, 1o1
Elo allegory...W, 1. Second rear wheel - Figure 1

Claims (1)

[Claims] a ring-shaped heater that is supported by the truck and that surrounds and heat-shrinks the heat-shrinkable sleeve on the outer periphery of the tube; a truck fixing device for preventing movement of the truck, the ring-shaped heater being supported by the frame of the truck between the front wheels and the rear wheels of the truck, and a tube-covered heat shrinkable sleeve. heating device.