JPS60232882A - Flange bolt detachable device - 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 Industrial Application) The present invention is used for tightening bolts for large flanges, for example, in the roundness/straightness correction process after completion of pipe forming and welding in the manufacturing process of UO steel pipes. This invention relates to a flange bolt attachment/detachment device such as a pipe expansion device.

(Prior technology) Pipe expansion equipment is an essential process for ensuring dimensional accuracy in the refining process of UO steel pipes, and the entire head of the pipe expansion equipment must be replaced and rearranged according to the outer diameter and plate thickness dimensions of the steel pipe. occurs.

Fig. 6 is a side view showing the expanded state of the steel pipe in the UO pipe expansion device. After inserting the head so as to enclose it, pull the pull rod 7 shown in the cross-sectional view of the head part in Figure 6 using the pressure of the hydraulic cylinder to release the corn nut 2, corn nut mounting bolt 8, and lubricating ring 3.
, by transmitting a pulling force to the cone 4 and pushing the segments 5 apart in the radial direction through the taper of the cone 4.
Expanding a UO steel pipe involves expanding the steel pipe 1 in the radial direction, contracting the segment 5 in the reverse procedure to the above, and repeating this process to correct the roundness and straightness over the entire length of the pipe.

Regarding the attachment and detachment of the flange bolt that disconnects the entire head from the boom when replacing or rearranging the old and new heads,
The conventional method and general method is to loosen the 10 to 12 mounting bolts that connect the flange and boom one by one using a tool such as a hex wrench, cut off the connection between the flange and boom, and then tighten the bolts on the boom. When attaching the flange bolts, the flange bolts are completely removed from the flange portion, and the flange bolts are attached and detached by reversing the above-mentioned removal procedure.

(Problems to be Solved by the Present Invention) These conventional methods and methods of attaching and detaching using general means also pose safety problems for the reassembly workers.

In addition, this type of bolt rotation device was developed in Japanese Patent Application Laid-open No. 49-1989.
There is a device described in Japanese Patent No. 999, which uses a pump unit to hydraulically tighten bolts and nuts. Although various other automatic tightening devices for bolts and nuts are commercially available, there is no example of a device that fully automatically attaches and detaches bolts on large flanges, such as the UO steel pipe expansion device according to the present invention.

(Objective of the present invention) The present invention can be achieved with the purpose of shortening the time required for attaching and detaching flange bolts of large flanges, which is carried out in head replacement work of pipe expansion equipment, etc., and ensuring safety by mechanizing manual work.
The details of the device of the present invention will be explained below based on the drawings, and the details of the device of the present invention will be clarified by explaining its system and structure.

(Means for Solving the Problems) The device of the present invention is provided with a flange bolt 10 having a gear head so as to be slidable through a guide block in a flange which is bolted with a countersocket portion. Flange bolt turning hydraulic motor 18, drive shaft 19, coupling, drive gear 17, intermediate gear 16, frame 21
A flange bolt attachment/detachment unit consisting of a flange bolt attachment/detachment unit, a gear setting adjustment unit for driving a mount frame n housing several of the flange bolt attachment/detachment units, and a frame B to which the gear setting adjustment units are attached above and below, The intermediate gear 16 is engaged with each head gear of the flange bolt 10 so that the periphery of the flange is gripped by the frame B, and the hydraulic motor 18
This is a flange bolt attachment/detachment device characterized in that the shift flange bolt 10 is attached/detached by driving the flange bolt 10.

(Example) Figures 1 and 2 are overall views of the device of the present invention as seen from the boom axis direction, Figures 3 and 4 are cross-sectional views of the flange bolt attachment/detachment unit, and Figure 5 is the figure 3. A sectional view taken along line A-A of FIG.

The device of the present invention first includes an intermediate gear 16 that engages with a flange bolt 10 whose head is a gear, and a drive gear. 1Φ gear 17, a guide bar δ and guide block that serve as guides when the flange bolt 10 slides, a drive shaft 19 with a claw-type coupling in the middle for adjusting the backlash when gears are engaged, and a hydraulic motor 18 for turning the flange bolt. , a flange bolt attachment/detachment unit consisting of a frame 21 for attaching each of these element parts; second, a mount frame n housing several flange bolt attachment/detachment units according to the number of flange bolts 10; and an intermediate gear 16 set on the flange bolts 10. When doing so, a gear setting adjustment unit is comprised of a gear positioning stopper 15 that fits into a hole provided on the boom 9 side to determine the initial gear engagement position, and a gear setting hydraulic cylinder 14 that drives the mount frame η. , Thirdly, there are two gear setting adjustment units on the left and right sides. Opening/closing frame n1 installed above and below; opening/closing limit stopper 13 that fits into a hole provided on the boom 9 side to determine the stop position; and integrated with opening/closing frame n. A slide base 12 is driven by a hydraulic motor-driven pinion 11 via a screw-binion mechanism.
This device has a total of three opening/closing units in an integrated structure.

Among the components of the present invention, the gear portion of the flange bolt 10, the intermediate gear 16, and the tooth flank/root portion of the drive gear 17 are subjected to severe surface pressure 9 bending due to sliding and driving torque. For example, SCM2 with high strength and bending strength
4. It is necessary to use a material such as SN0M26.5cs24.

(Action of the present invention) Next, the operation of the device of the present invention will be explained.

Figure 2.1 shows the state before this device is attached to the boom 9. Drive the binion 11 to bring the slide base Minoru closer to the boom 9 in left and right synchronization via the rack. The mount frame 22 is stopped at a predetermined position determined by the opening/closing limit stopper 13, and the mount frame 22 is advanced by the gear setting hydraulic cylinder 14 to the position determined by the gear positioning stopper 15.
When the meshing of the intermediate gear 16 and the intermediate gear 16 are secured, the state shown in FIG. 2 is reached, in which preparation for bolt rotation is completed.

After the above operations are completed, in FIGS. 3, 4, and 5, which show the turning/extracting state of the flange bolt 10, first, the flange bolt turning hydraulic motor 18 is driven to perform the tightening type saw J ringing. After finely adjusting the back crank when the flange bolt 10 is engaged with the intermediate gear 16 and the drive gear 17 using the meshing play, the flange bolt 10 is moved between the flange 6 and the boom 9 by the drive of the flange bolt turning hydraulic motor 18. Pull it out to the position without touching the mating surface of the bolt. At this time, slide the guide bar 5 attached to the bolt head backwards using the guide block A as a guide surface, and use the hole made in the boom seat part to cover the removal allowance. The flange bolt 10 is rotated with necessary and sufficient force, and the flange bolt removal work is completed as shown in FIG. The tightening work shall be performed in the opposite manner to the above-mentioned removal procedure, and at this time, apply a necessary and sufficient tightening torque to the flange bolt turning hydraulic motor 18 compared to the tightening torque currently applied by manual labor. Lean and tighten.

(Effects of the Invention) As explained above, the device of the present invention can be used for any flange as long as it is a large flange equivalent to the flange of the UO steel pipe expansion device, and can be used on the side of such a large flange. The flange bolts are installed on both sides of the boot, and can quickly attach and detach 10 to 12 flange bolts in the circumferential direction at the same time.It also allows multiple axes to be attached and detached at the same time without taking the bolts out of the boot. Shortening can be made possible.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figure 1 is a front view of the device of the present invention seen from the axial direction before it is installed on the boom, Figure 2 is a front view of the device when it is installed, and Figure 3 is a front view of the device before it is installed on the boom. A side view of the device of the present invention attached to a flange bolt, FIG. 4 is a side view after the flange bolt is removed, FIG. 5 is a cross-sectional view taken along line A-A in FIG. 3, and FIG. 6 is the entire tube expansion device. The side view showing the positional relationship between the pipe and the pipe is a sectional view taken along the line B-B in FIG. 6. 1 is UO steel pipe, 2 is corn nut, 3 is lubricating ring, 4
is a cone, 5 is a segment, 6 is a flange, 7 is a fill rod, 8 is a corn nut bolt, 9 is a boom,
10 is a flange bolt, 11 is a binion, 12 is a slide base, 13 is an opening/closing limit stopper, 14 is a hydraulic cylinder for gear setting, 15 is a gear positioning stopper, 16 is an intermediate gear, 17 is a drive gear, 18 is a flange bolt Hydraulic motor for swing,] 9 is a drive shaft, 2 is a claw-type cuff ring, 21 is a frame, 22 is a mount frame, n is an opening/closing frame, Sae is a rank, 5 is a guide bar,
The part is the guide block. Patent Applicant: Nippon Steel Corporation Taihei Kogyo Co., Ltd. Ya/Fl Missing 2 Figures 3 Figures 4 Figures 20 2i l! 3) 263 − j q one, ya=7

Claims (1)

[Claims] In flanges that are bolted with a counterbore,
A flange bolt with a gear head is provided so as to be slidable through a guide block, and a hydraulic motor for rotating the flange bolt, a drive shaft, a coupling, a drive gear, an intermediate gear,
A flange bolt attachment and detachment unit consisting of a frame, and a gear setting adjustment unit that drives the mount frame that houses several of the flange bolt attachment and detachment units.
It is composed of a frame on which the gear setting adjustment unit is attached above and below, and the frame grips the periphery of the flange and engages the intermediate gear with each head gear of the flange bolt to drive the hydraulic motor. A flange bolt attachment/detachment device characterized in that the flange bolt is attached/detached by the following steps.