JPH0643845B2 - Sling bolt adjustment method and adjustment jig - Google Patents

Description

TECHNICAL FIELD The present invention relates to an adjusting method and an adjusting jig for a sling bolt of a heavy equipment such as a boiler that is suspended and installed in a space.

[Conventional technology]

FIG. 3 is a view showing a state in which a boiler head 1 is suspended from a boiler steel frame 1, and a block washer 3 is arranged at an upper end portion of the boiler steel frame 1 and a hole 3 a provided at a central portion of the block washer 3 The sling bolt 4 penetrates through. An adjusting nut 5 screwed onto the sling bolt 4 is arranged on the upper surface of the block washer 3, and the adjusting nut 5 supports the boiler header 2 connected to the lower end of the sling bolt 4 and also the vertical direction of the suspended object. Plays a role in adjusting the level of. Further, a nut disengagement stopper 6 is provided on the upper end portion of the sling bolt 4 so that it cannot be easily removed.

Generally, in large-scale thermal power plants, hundreds of sling bolts 4 with a diameter of 100 mm are used to suspend and hold a boiler of several thousand tons in a space. Adjust the level several times.
Then, the tightening adjustment of the adjustment nut 5 of the sling bolt 4 is performed every time.

[Problems to be solved by the invention]

However, in the conventional case, when the adjustment nut 5 of the sling bolt 4 is to be tightened and adjusted, as shown in FIG. A person shook the large hammer 9 and rotated the adjustment nut 5 little by little to make adjustments. Therefore, it takes time to adjust in combination with working at height,
There is a risk of being hit by a large hammer that has been struck,
There were drawbacks such as getting tired.

The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a sling bolt adjusting method and an adjusting jig which are easy to adjust the sling bolt, reduce fatigue, and have high safety.

[Means for solving problems]

According to a first aspect of the present invention, a sling bolt, which is used for suspending an object and has an enlarged diameter portion for preventing desorption at an upper end thereof and has a threaded portion on a lower side of the desorption stopper, is vertically adjusted. In the method, an adjusting jig, which is dividable into a plurality of parts in the radial direction with respect to the threaded part, and each of the divided pieces has a female thread part screwed into the threaded part, the adjusting jig and the object. And a jack for moving the adjusting jig in the vertical direction, and a screw that is screwed onto the screw part and is mounted on the support. When adjusting the sling bolt in the up-down direction using an adjustment nut arranged above the placed support member to adjust the sling bolt in the up-down direction with respect to the support member, the sling bolt Is split The adjustment jig is sandwiched by the pieces of the adjustment jig from the outside in the radial direction, the pieces of the adjustment jig are connected to each other, the female screw portion is screwed into the screw portion, and the adjustment jig is screwed into the screw portion. The adjusting nut is rotated after the tool is pushed up by the jack.

Further, the invention according to claim 2 is an adjustment jig for vertically adjusting a sling bolt having an enlarged diameter portion for preventing desorption at the upper end portion and having a threaded portion on the lower side of the desorption prevention. The adjustment jig includes a plurality of adjustment jig divided pieces that are divided in the radial direction with respect to the screw portion, and the adjustment jig divided pieces that are divided into a plurality of pieces are connected to each other to form an integrated body. And a female screw portion provided on each of the adjusting jig divided pieces and screwed into the screw portion.

[Action]

As described above, in the present invention, the adjusting jig is attached by connecting the adjusting jig piece to the threaded portion of the sling bolt from the outside in the radial direction, and the sling bolt is attached by pushing up the adjusting jig with the jack. It is pushed up. In this state, the force applied to the adjusting nut is released, so that the adjusting nut can be easily rotated and the sling bolt can be easily adjusted in the vertical direction.

〔Example〕

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 is an exploded perspective view of an adjusting jig used in the adjusting method of the present invention. This jig has two plates 10 (10a, 10b) facing each other. These two plates 10a, 10b have the same shape, and a first notch 11 is provided at an intermediate position in the longitudinal direction. It is provided. The first notch 11 is notched upward from the lower end of the plates 10a, 10b to a predetermined position. This notch 11
Has a width dimension into which the half nut 12 can be inserted, and a depth dimension into which the upper end portion 13a of the sling bolt 13 can be inserted. Also, the plates 10a, 1
Second cutouts 14 are provided at the lower ends of both ends in the longitudinal direction of 0b, and the upper end surface 15a of the jack 15 (see FIG. 2) is applied to the upper surface 14a of the second cutouts 14. Has become.

The half nut 12 has a female screw portion 12a screwed onto an upper end portion 13a of a sling bolt 13 to form a male screw portion 13b.
It is formed so that it can be screwed into, and the outer surface portion 12b of the half nut 12 is welded to the first notch 11. Further, in the plates 10a and 10b, a through hole 16 is formed between the first notch portion 11 and the second notch portion 14 so that the bolt 17 can pass therethrough. The two plates 10a, 10
In the state of b, the bolts 17 and nuts 18 are integrally assembled in a state of being face-to-face.

Next, the adjusting method of the present invention will be described with reference to FIG. First, the adjustment jig 19 is attached to the upper end portion 1 of the sling bolt 13.
It is attached to the male screw portion 13b of 3a. That is, after the female screw portion 12a of the half nut 12 of the adjusting jig 19 is screwed into the male screw portion 13b of the sling bolt 13 from both sides, the bolt 17 is passed through the through hole 16 and fixed by the nut 18. The adjustment jig 19 is attached.

Next, the two jacks 15 are placed on the block washer 22 arranged between the boiler steel frame 20 and the adjusting nut 21, and the upper surface 14 of the second cutout portion 14 of the adjusting jig 19 is placed.
The upper end surface 15a of the jack 15 is applied to a. After this,
The two jigs 15 are simultaneously operated to push the adjusting jig 19 upward. Then, the pushing force is transmitted from the two half nuts 12 to the male screw portion 13b of the sling bolt 13, and the sling bolt 13 is pulled upward. Along with this, the adjustment nut 21 is separated from the upper surface of the block washer 22, the thrust force that has been applied until then is eliminated, and the rotation of the adjustment nut 21 is freely lightened.

After that, when the adjusting nut 21 is manually rotated and stopped at a predetermined position and the jack 15 is reversely operated to lower the sling bolt 13, the adjusting nut 21 comes into contact with the upper surface of the block washer 22 to support the load. In this state, the jack 15 has no load and is removed. Next, the bolt 1
The work is completed by removing 7 from the plate 10 and removing the adjusting jig 19 from the sling bolt 13.

The jack 15 may be either a hydraulic type or a journal type.

〔The invention's effect〕

As described above, according to the present invention, since the adjusting jig is attached to the sling bolt and the adjusting jig is pushed up by the jack, the adjusting nut is rotated while the sling bolt is pulled upward. The sling bolt adjustment work can be performed very easily and in a short time compared to the above, and less fatigue is required during the work. Since the adjusting jig can be composed of at least two pairs of adjusting jig pieces, the structure is extremely simple and there are few failure factors. Further, since the adjusting jig is attached by applying the adjusting jig piece from the outer side in the radial direction of the screw portion, even if the enlarged diameter portion for the stopper is large or small, the attaching work is not affected. Furthermore, since the jack is inserted between the adjustment jig and the support in the radial direction of the sling bolt, it is possible to use ordinary commercial products and easily respond to changes in stroke, thrust, etc. It becomes unnecessary. Also,
At the time of adjustment, the adjustment nut can be rotated without the thrust applied to the adjustment nut, so one person can do the work sufficiently, and since it can be adjusted by hand, the safety is greatly improved. Produce an effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an adjusting jig used in the adjusting method of the present invention, FIG. 2 is a view for explaining the adjusting method of the present invention, and FIG. 3 is a partial view in which a boiler head is suspended from a boiler steel frame. , FIG. 4 is a diagram for explaining a conventional adjustment method. 10 (10a, 10b) ... plate, 11 ... first notch, 12 ... half nut, 13 ... sling bolt, 13a ... upper end, 13b ... male screw part, 14 ... second Notch, 15 ... Jack, 17 ... Bolt.

Claims (2)

[Claims] 1. A method of vertically adjusting a sling bolt, which is used for suspending an object and has an enlarged diameter portion for preventing desorption at an upper end thereof and having a screw portion on a lower side of the desorption prevention, It is possible to divide into multiple parts in the radial direction with respect to the screw part,
The adjustment jig having internal threaded portions that are respectively screwed into the threaded portions on the divided pieces, and the adjustment jig and a support body that supports the load of the object are removable in the radial direction of the sling bolt. And a jack for moving the adjustment jig in the vertical direction, and a sling bolt with respect to the support member, which is arranged on an upper side of a support member which is screwed into the screw portion and placed on the support body. When adjusting the sling bolt in the up-down direction, using an adjustment nut for adjusting in the up-down direction, the sling bolt is sandwiched by the divided pieces of the adjustment jig from outside in the radial direction, and the adjustment is performed. Connecting the respective pieces of the jig to each other to screw the female screw portion into the screw portion, and pushing up the adjusting jig screwed into the screw portion with the jack, and then rotating the adjusting nut. How to adjust the characteristic sling bolt. 2. An adjusting jig for vertically adjusting a sling bolt having an enlarged diameter portion for preventing desorption and having a threaded portion on a lower side of the desorption stopper, the adjusting jig The tool is a fixing means for connecting a plurality of adjusting jig divided pieces, which are divided in the radial direction with respect to the screw portion, and the adjusting jig divided pieces, which are divided into a plurality of pieces, to each other to integrate them. And an internal thread portion provided on each of the adjustment jig divided pieces and screwed into the thread portion.