JPH0154159B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention, for example, when welding a main pipe and a branch pipe constituting a connecting pipe in fluid equipment, holds the main pipe rotatably and eliminates distortion of the main pipe caused by welding. The present invention relates to a device for pressurizing the air.

In manufacturing a connecting pipe formed by welding several branch pipes to a main pipe, an apparatus as shown in FIGS. 1 to 4 is used. That is, the first
2A and 2B show a holding device during welding, in which reference numeral 1 denotes a main pipe, flanges 2 are temporarily attached to both ends of the main pipe, and a plurality of branch pipes 3 are temporarily attached at appropriate positions along the entire length. Note that 4 is a flange welded to the branch pipe. Reference numeral 5 denotes a support mechanism that supports the main pipe 1 from left and right sides, and is designed to tilt on a base 6 with a pin 7 as a fulcrum. Therefore, when welding the branch pipe 3 temporarily attached to the main pipe 1, first weld one side of the inclined side,
Then, tilt it to the opposite side and weld the remaining half of the circumference.

3 and 4 show a device for removing strain generated in the connecting pipe after welding is completed, and the support mechanism 8 for the main pipe 1.
are fixed opposite to each other on a surface plate 9, and a thread 11 for level measurement is stretched across the top of the plate 10 via a ball 10 with a magnet. In addition to the mechanism 8, there are provided a jack 12 for correcting the bending of the pipe, a heater 13 for the distortion generating section, and a cooling water sprinkler 13a.

As mentioned above, welding and strain relief have conventionally been carried out using dedicated equipment, which requires time to transport and attach/detach the pipes, and since reversing during welding is extremely difficult and dangerous, cranes have not been used. In addition, there were drawbacks such as the constant danger of heating and cooling operations being added to the strain relief work.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional art, and provides an apparatus that is equipped with a mechanism that can apply rotation for performing welding and pressurization for eliminating distortion while holding the main pipe. An embodiment of the present invention shown in FIGS. 5 to 10 will be described below.

That is, the present invention includes a driving side support mechanism 15 mounted and fixed on one end of the bed 14, and
It is composed of a driven-side support mechanism 17 that moves along the rail 16 laid above, and a pressure mechanism 18 that is located between the support mechanisms 15 and 17 and moves along the rail 16. It is.

By the way, in the drive side support mechanism 15,
Reference numeral 19 denotes a drive shaft rotatably supported by a bearing 20 fixed on the bed 14, and a stepped shaft portion 21 is integrally provided at the inner end of the drive shaft, and a plurality of main pipes 1 of different sizes can be attached and supported. It's becoming like that.
22, 23, 24 are pins that fit into the holes of the flange 2 of the main pipe 1 and transmit rotational torque, and these pins 22, 23 are installed upright on the mounting bracket 25,
When not in use, it is designed to be stored using a groove and a hole provided in a portion of the stepped shaft portion 21. 26
is a drive mechanism that transmits rotation to the drive shaft 19, which includes a motor 27, a transmission 28, and a sprocket 2.
9, 30, and chain 31. Note 32
is a torque limiter, which causes the sprocket 30 to idle when an external force is applied to the main pipe 1 side during rotation.
It protects the equipment.

In the support mechanism 17 on the driven side, a driven shaft 35 is rotatably supported by a bearing 34 provided on a traveling carriage 33, and the inner end thereof has a stepped shaft portion 21 provided on the drive shaft 19. Step shaft portions 36 having the same number of diameters are provided. The main pipe support mechanism 17 changes its position depending on the length of the main pipe 1.
A handle attachment tightening tool 37 is provided to firmly maintain the state in which the main pipe 1 is completely supported between the support mechanism 15 on the driving side.

The pressure mechanism 18 includes a traveling truck 38, a hydraulic cylinder 40 vertically supported at the center of its upper part via a support member 39, and a pressure clamper 41 that moves up and down as the rod of the hydraulic cylinder 40 moves in and out. It consists of By the way, the pressure clamper 41 is equipped with second and third clampers 43 and 44 that are fitted onto the first clamper 42 that is directly connected to the rod end, and are used as appropriate depending on the diameter of the main pipe 1. I'm starting to do that. Note that 4 in the figure
Reference numeral 5 indicates a rotation prevention shaft of the pressure clamper 41, and reference numeral 46 indicates a buffer support mechanism for the traveling carriage 38. As shown in FIG. It is elastically supported, and the distance from the trolley body can be changed using the shaft 50 as a guide. Therefore, when pushing up the pressure clamper 41 to straighten the bend in the main pipe 1,
The reaction force causes the main body of the truck to descend a small amount and come into contact with the upper surface of the rail 16, thereby preventing the reaction force from acting on the wheels 47. Note that FIGS. 9 and 10 show the single structure of the pressure clamper 41, and in the figures, 51 is a pin for determining the position of each clamper.

Further, 52 is carbon for earthing during welding, and is joined to a suitable position of the main pipe support mechanism 15 on the drive side, from which a grounding wire 53 is led out. 54 is a hydraulic pump for pressurization, 55 is a pendant switch for operation, 5
6 is a hydraulic hose, and 57 is an operation panel for operating the motor 27.

This invention has a structure as described above with respect to its embodiments. When using the invention, first, preparations are made so that the pin 22 or 23 that fits the flange 2 of the main pipe 1 can be used, and then the main pipe is moved with a crane.
is suspended, one end of which is inserted into the stepped shaft portion 21 of the drive shaft 19, and a pin is inserted into the hole of the flange 2. Then, move the driven side support mechanism 17 that has been retreated in advance, and insert the stepped shaft portion 36 into the other end of the main pipe 1.
The mechanism 17 is secured to the rail 16 by operating the handle fastener 37. Next, the motor 27 is started to rotate the branch pipe 3 temporarily attached to the main pipe 1 to an angle that allows welding in a downward position, and the pressure mechanism 18 for preventing welding distortion is moved to an appropriate position. At this point, the hydraulic cylinder 40 is operated to push up the pressurizing clamper 41, and welding is performed in a state where the main pipe 1 is pressurized and reverse strain is applied. After half-circumferentially welding the branch pipe 3, the main pipe is rotated again by an appropriate angle.
As before, welding is performed while applying a reverse strain using the pressure clamper 41. If distortion still occurs even after welding is completed in this way, it is sufficient to remove the distortion by repeating the rotating operation of the main pipe 1 and the operation of the pressure clamper 41. The level of each flange 4 is measured and checked by the thread 11.

In the example, we described the case of welding and strain relief of connecting pipes, but by changing the structure of the stepped shaft part of the drive shaft and driven shaft and the pressurizing clamper, the device can be used for other workpieces. It goes without saying that it can be utilized, and if the reduction ratio of the transmission is set to the welding speed, it is also possible to weld the main pipe and flange continuously, for example.

As described above, according to the present invention, the main pipe, etc. is rotatably held from both ends, and is equipped with a mechanism for rotationally driving the main pipe and a pressurizing mechanism, and the work setup can be changed between welding and strain relief. It is easy and safe to do so.

[Brief explanation of drawings]

Figure 1 is a front view of a conventional welding holding device, Figure 2 is a front view of a conventional welding holding device;
3 is a front view of a conventional strain removing device, FIG. 4 is a side view thereof, FIG. 5 is a plan view of the entire device showing an embodiment of the present invention, and FIG. 6 is a front view of a conventional strain removing device. 7 is a vertical sectional view of the pressure mechanism, FIG. 8 is an enlarged sectional view of the buffer support mechanism in FIG. 7, and FIG. 9 is a front view of the pressure clamper.
FIG. 10 is a side view of the same. In the figure, 14 is a bed, 15 is a support mechanism on the driving side, 16 is a rail, 17 is a support mechanism on the driven side, and 18 is a pressurizing mechanism. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A drive-side support mechanism consisting of a drive shaft that is supported by a bearing placed and fixed at one end of the bed and directly connected to a stepped shaft part that fits and fixes one of the main pipes to the inner end, and a drive mechanism that transmits rotation to this drive shaft; A support mechanism on the driven side consisting of a truck that runs along the rail on the bed and a driven shaft that is rotatably supported by a bearing provided on the truck and that is directly connected to the stepped shaft that supports the other side of the main pipe at the inner end, and both of the above support mechanisms. A workpiece rotation holding device characterized by being equipped with a pressurizing mechanism consisting of a dolly along the rail, a hydraulic cylinder vertically supported by the dolly, and a pressurizing clamper directly connected to the rod end of the hydraulic cylinder. Pressure device.