JP2519317B2 - Pump foundation bolt setting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a pump foundation bolt setting method for a large vertical pump.

(Prior Art) Hereinafter, the configuration of a large vertical pump will be described with reference to FIG. In FIG. 5, a pump pit 2 is formed in the foundation concrete 1, and a pump pit can 9 is arranged on the inner surface of the pump pit 2. A pump barrel 11 is housed in the pump pit can 9, and a flange 11a of the pump barrel 11 is fixed by a nut 8 via a foundation bolt 5 protruding from the foundation concrete 1. Inside the pump barrel 11, a pump pumping pipe 19 having a pump suction bell mouth 18 formed at the lower end is arranged. A pump 20 is arranged in the pump pumping pipe 19, and by driving the pump 20, the liquid introduced into the pump barrel 11 through the introduction pipe 21 is discharged to the outside of the system through the discharge pipe 22. To be done.

In the above configuration, the setting of the foundation bolt of the large vertical pump described above is performed as shown in FIGS. 6 and 7. 6 and 7, lower foundation concrete
First, 1a is placed, and after hardening of the lower foundation concrete 1a, the reinforcing bar 3 around the pump pit 2 is laid. After that, the pull-out prevention plate fixing base 4 is assembled on the upper surface of the lower foundation concrete 1a (concrete joint surface) while adjusting with the set rebar 3. On the upper part of the pull-out prevention plate fixing base 4, check that the pull-out prevention plate 6 with the foundation bolts 5 shown in FIG. 7 is divided into four parts, and check the pump discharge direction mark and the matching mark 17 between the pull-out prevention plates 6. Place it temporarily. The template 7 is fixed to the upper part of the temporarily set foundation bolt 5 through the nut 8.

At this time, the template 7 is set by checking the pump discharge direction mark that is attached in advance. Then, the relative positions of the foundation bolts 5 are determined, and the pull-out prevention plates 6 are tack-welded. Then, the template 7 is centered so as to be concentric with the center point of the pump pit can 9. Further, the levelness of the template 7 is confirmed, and the pull-out prevention plate 6 is main-welded and the pull-out prevention plate 6 and the template 7 are welded to the pull-out prevention plate fixing mount 4 and the mold plate fixing mount 10 to be fixed.

After setting the foundation bolt 5 as described above, after placing the upper foundation concrete 1b and hardening the upper foundation concrete 1b, the concentricity and the levelness of the template 7 with the pump pit can 9 are confirmed again. The foundation bolt was set.

(Problems to be solved by the invention) Conventional large-sized vertical pump foundation bolts are set up by a large number of reinforcing bars and pull-out prevention plate fixing mounts, which are arranged around the pump pit to reinforce the body of the opening of the pump pit. Since the plate fixing base interferes at many places, it was very difficult to adjust each other. In addition, there is a possibility that the pull-out prevention plate fixed frame etc. may move due to the load when placing concrete and cause core misalignment, and the frame becomes a stronger one to prevent this frame movement, and the interference with the reinforcing bar increases. was there.

The present invention has been made in view of the above problems, and an object thereof is to prevent a core misalignment between a foundation bolt and a pump pit can and to prevent a pull-out prevention plate fixing base and a temporary fixing base bolt of a template fixing base. It is to obtain a pump foundation bolt setting method that can avoid interference with rebars and rationalize installation work by omitting it.

[Structure of Invention]

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a template for pump foundation bolt positioning in which a pump foundation bolt is fixed to an upper portion of a pump pit can fixed to a lower foundation concrete. Is placed, the template and the pump pit can are positioned concentrically via the positioning device arranged on this template, and after this template is horizontally set, it is fixed and the upper foundation concrete is placed, A method for setting a pump base bolt, characterized in that the template is removed after setting the upper base concrete and the pump base bolt is set at a predetermined position.

(Function) In the structure thus configured, the pump pit can set in the building concrete supports the foundation bolt and the template with the pull-out prevention plate, and the positioning device attached to the template is attached to the inner wall of the pump pit can. On the contrary, the template is positioned at the center of the pump pit can and the center of the circle by tightening the reaction force. Furthermore, the template is fixed to the pump pit can via the bolt and the bracket by tightening a nut on a bolt penetrating the template mounted on the outside of the pump pit can via the bracket.

Therefore, it is possible to avoid the interference with the reinforcing bar and rationalize the installation work.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In FIGS. 1 to 4, the same parts as those in FIGS. 5 to 7 are designated by the same reference numerals, and the description of the configuration will be omitted.

First, as shown in FIG. 1, the pump pit can 9 is set and the lower foundation concrete 1a is placed. A template fixing bracket 14 is fixed to the pump pit can 9,
A template fixing bolt 15 is arranged on the template fixing bracket 14. Reference numeral 23 in FIG. 1 is a reinforcing bar protruding from the lower foundation concrete 1a.

Next, as shown in FIG. 2, the reinforcing bars 3 around the pump pit can 9 are assembled. A template 24 as shown in FIG. 3 is mounted on the pump pit can 9. A foundation bolt 5 is fixed to the template 24 via bolts 25 around the periphery of the template 24, and a pull-out prevention plate 6 is attached to a lower end portion of the foundation bolt 5.
Are arranged.

The mold plate 24 on the pump pit can 9 is tightened with a positioning bolt 13 attached to the center opening of the mold plate 24 via a centering bracket 12, so that the load of the positioning bolt 13 on the pump pit can 9 is increased. By the added force, the upper part of the pump pit can 9 is positioned on the same axis as the slip pump pit can 9 by the reaction force. After that, all the positioning bolts 13 are tightened to the pump pit can 9 to fix the template 24 in the horizontal direction.

Further, the template 24, after positioning the template 24, sandwiches a thin plate (not shown) between the template 24 and the pump pit can 9 to provide horizontality.

As described above, after setting the template 24 and the foundation bolt 5,
In order to prevent the template 24 from rising when placing the upper foundation concrete 1b, the pump pit can 9 is tightened by tightening the nut 16 into the template fixing bolt 15 fixed to the bracket 14 attached to the outside of the pump pit can 9. Fix the template to.

Then, as shown in FIG. 4, all of the basic concrete 1 is cast, and after hardening, the template 24, the template fixing bolt 15 and the nut 16 described above are removed. The template 24 is removed by removing the nut 8 and the nut 16, and the template fixing bolt 15 is cut at the concrete joint surface.

Therefore, according to the above-described embodiment of the present invention, the setting of the foundation bolt 5 can be performed only by placing the template 7 on the upper part of the pump pit can 9, and the positioning of the template 7 can also be performed by the positioning bolt 13. Therefore, the installation work of the foundation bolt 5 can be facilitated.

Positioning bolt 13, template fixing bolt 15, nut
Since the template 7 can be securely fixed to the pump pit can 9 by 16, it is possible to prevent the foundation bolt 5 from moving (center misalignment) due to concrete pouring.

〔The invention's effect〕

According to the present invention, the foundation bolt can be easily and reliably fixed by the positioning bolt, the template fixing bolt, and the nut.

In addition, since temporary objects such as a fixed base are unnecessary, there is no interference between the reinforcing bars and the temporary objects, facilitating the reinforcing bar installation adjustment work, and rationalizing the foundation bolt installation work.

Further, the positioning work of the foundation bolt can be easily performed by the positioning bolt.

[Brief description of drawings]

1, 2, and 4 are vertical cross-sectional views each illustrating a method for setting a pump foundation bolt according to an embodiment of the present invention, and FIG. 3 is a pump foundation bolt positioning die shown in FIG. Fig. 5 is a plan view of a plate, Fig. 5 is a vertical cross-sectional view of a large vertical pump, Fig. 6 is a vertical cross-sectional view showing a conventional example of a pump foundation bolt setting method,
The drawing is a perspective view of the pull-out prevention plate with the foundation bolt shown in FIG. 1 ... Foundation concrete, 1a ... Lower foundation concrete 1b ... Upper foundation concrete, 5 ... Foundation bolt 6 ... Pull-out prevention plate, 9 ... Pump pit can 12 ... Centering bracket, 13 ... Positioning bolt 24 …… Template

Claims (1)

(57) [Claims] 1. A template for positioning a pump foundation bolt, which is fixed with a pump foundation bolt, is mounted on an upper portion of a pump pit can fixed to a lower foundation concrete, and a positioning device disposed on the template is used. Position the template and the pump pit can concentrically, set the template horizontally, then fix it and place the upper foundation concrete.After hardening the upper foundation concrete, remove the template and set the pump foundation bolts. A pump foundation bolt setting method, characterized in that the pump foundation bolt is set at the position.