JP2003161300A - Mount frame of pump head cover and usage thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mount frame used for efficiently performing the maintenance and inspection of a pump head cover and a usage thereof by eliminating turn-over work when separating the pump head cover from a heavy pump such as large pump to perform the maintenance and inspection. <P>SOLUTION: This mount frame 10 for vertically mounting the circular pump head cover 3 circumferentially having a plurality of fastening bolt holes 4 comprises a pair of support members 12 arranged on a base 11 opposite to each other with a prescribed space, and a support bolt 14 insertable to a support hole 13 provided in each support member 12. The fastening bolt hole 4 is matched to the support hole 13, and the support bolt 14 is inserted thereto, whereby the pump head cover 3 is supported and mounted. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for vertically mounting and stably supporting a pump head cover, which is detached from a pump having a large size and a large weight such as a large pump, for maintenance and inspection. A mounting base and a method of using the same.

[0002]

2. Description of the Related Art Generally, a large pump such as a cooling water pump in a power plant is periodically disassembled in accordance with a predetermined manual to carry out maintenance and inspection work for each part. Among the components of a large-sized pump, the pump head cover, in particular, has a large weight and size, so that maintenance and inspection requires a lot of trouble and difficulty.

FIG. 4 is a partial sectional view showing an example of a large pump. A pump head cover 3 is detachably fixed to a main body 2 of the pump 1. A circular pump head cover 3 shown as a cross-hatched portion has a plurality of tightening bolt holes 4 penetrating in the circumferential direction, and the tightening bolts 5 are respectively inserted into the tightening bolt holes 4 so that the screws of the main body 2 are screwed. The pump head cover 3 is fixed to the main body 2 of the pump 1 by being screwed into the hole. Then, at the time of maintenance and inspection, the tightening bolts 5 are removed, the pump head cover 3 is supported by a lifting device such as a crane, and the pump head cover 3 is pulled out from the shaft 6 in the leftward direction in the drawing and lifted off from the main body 2. FIG. 5 shows a perspective view of the separated pump head cover 3.

Conventionally, the pump head cover 3 hoisted by a hoisting device is lowered onto the work floor and placed horizontally (that is, its axial direction is placed vertically), and the upper side is first inspected and then hoisted again. Upside down (so-called upside down work)
Then, perform maintenance and inspection on the lower side.

[0005]

However, inverting the heavy pump head cover 3 upside down for maintenance and inspection work requires a great deal of time and labor, and there is a risk that the work is dangerous. was there. Therefore, an object of the present invention is to solve such a problem in the maintenance and inspection work of the pump head cover, and an object thereof is to provide a new mounting base of the pump head cover and a method of using the mounting base.

[0006]

That is, the mounting base according to the present invention is a mounting base for vertically mounting a circular pump head cover having a plurality of tightening bolt holes in the circumferential direction. The mounting table includes a base portion, a pair of support members arranged to face the base portion at predetermined intervals, a support hole provided in each support member, and a support bolt insertable into each support hole. The pump head cover is supported and placed by aligning the tightening bolt holes of the pump head cover with the support holes of the respective support members and inserting and fastening the support bolts into them. (Claim 1).

In the above mounting stand, a wheel device for movement can be provided on the base portion, and the pair of support members can be detachably provided on the base portion (claim 2). Further, in any one of the mounting bases described above, a movement preventing means can be provided at the base portion (claim 3).

The method of using the mounting table according to the present invention is as follows.
The pump head cover is vertically mounted on any one of the mounting bases, and the front and back of the pump head cover are maintained and inspected (claim 4).

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a mounting base according to the present invention,
2 is a side view of FIG. 2 viewed from the right side of FIG. 1, and FIG. 3 is a plan view of FIG. In these figures, 10 is a mounting base, 11 is a base portion, 11a is a lateral member, 11b is a leg portion, 12 is a supporting member, 13 is a supporting hole, 14 is a supporting bolt, 15 is a wheel device, 16 is a free caster, 17 is a fixed caster, 18 is a movement preventing means, 19 is a circular handle, 19a is a screw rod,
19b is a suction pad, 20, 21 are auxiliary support members, 22
Is a fixing bolt.

The mounting base 10 has a base 11 and a pair of support members 12 detachably provided on the base 11. The base portion 11 is provided with four lateral members 11a and three leg portions 11b extending downward from the lateral members 11a. The lateral member 11a and the leg portion 11b can use, for example, an angle member, and the base portion 11 can be formed by welding or bolting them. A movement preventing means 18 as a stopper is provided at the bottom of each leg 11b. Movement prevention means 1
Reference numeral 8 has a circular handle 19, a screw rod 19a fixed to the circular handle, and a suction pad 19b fixed to the tip of the screw rod 19a, and the screw rod 19a is screwed to the leg portion 11b. Then, by rotating the circular handle 19, the screw rod 19a extends with respect to the leg portion 11b, and the mounting base 1
0 is stably held on the floor by the action of the suction pad 19b.

As shown in FIG. 3, a wheel device 15 including a plurality of swivel casters 16 and fixed casters 17 is provided on a part of the base 11. The wheel device 15 is provided to move only the mounting base 10 with the base portion 11 lying sideways when the pump head cover 3 is not attached.

The pair of supporting members 12 is, for example, light mountain steel, L
The support hole 13 is made of a steel material having a relatively high strength, such as a shaped steel, and has a support hole 13 penetrating the upper portion formed in an elongated shape. The support hole 13 has an inner diameter through which the support bolt 14 can be inserted, and when the pump head cover 3 is supported, the support hole 13 is provided at a position where a pair of fastening bolt holes 4 on a horizontal diagonal line match.

The lower portion of each support member 12 is detachably attached to the base portion 11 with a fixing bolt 22. In a state where a pair of relatively long support members 12 are erected on the base 11,
For example, it may be difficult to pass the mounting table 10 through a narrow passage or the like. Therefore, by making the support member 12 detachable from the base portion 11, it is possible to easily deal with such a case.

As shown in FIGS. 2 and 3, one auxiliary support member 20 and two auxiliary support members 21 are erected from the base 11 inside the pair of support members 12. One auxiliary support member 20 located at the center is formed higher than two auxiliary support members 21 located on both sides, and the auxiliary support member 20 supports the small radius portion of the pump head cover 3 and the remaining auxiliary support members 21. Supports a large radius portion of the pump head cover 3.

The tops of the auxiliary supporting members 20 and 21 are formed in an arc shape, and the protective layer such as felt having elasticity provided on the surface of the auxiliary supporting members 20 and 21 reduces the impact when the pump head cover 3 is supported. .

Next, a method of using the mounting base according to the present invention will be described with reference to FIGS. First, the mounting table 10 with the support member 12 removed is transported to the floor of the work place, where the support member 12 is assembled to the base 11 by the fixing bolts 22. When the transportation path is wide, the mounting table 10 with the support member 12 attached thereto can be transported to the work place. Next, each movement preventing means 18 is set so that the mounting base 10 does not move on the floor and the positional displacement does not occur during the mounting work of the pump head cover 3.

Next, the pump head cover 3 which is detached from the pump and hoisted by a hoisting device such as a crane is moved to above the mounting table 10, and from there, the pump cover head 3 is gradually lowered to a pair of supporting members. Located between 12
Then, the hoisting device is finely adjusted, and in the plurality of tightening bolt holes 4 of the pump head cover 3, two tightening bolt holes 4 on a horizontal diagonal line are aligned with the support holes 13 of the support member 12. The two support bolts 14 are inserted into the support holes 13 and the tightening bolt holes 4 and fixed with nuts.

By the above operation, the pump head cover 3 is vertically mounted on the mounting table 10 while being supported by the pair of supporting members 12, and at this time, the lower portion of the pump head cover 3 is supported by the auxiliary supporting members 20 and 21. Supported and stabilized. The front and back of the pump head cover 3 mounted on the mounting base 10 can be maintained and inspected from the outside, so that it is not necessary to carry out the top-and-bottom work as in the conventional case.

After the maintenance and inspection of the pump head cover 3 is completed, the pump head cover 3 is removed from the mounting base 10 in the reverse order of the above, and the main body 2 of the pump 1 is lifted by the lifting device.
(See Fig. 4).

[0020]

As described above, the mounting base according to the present invention is
By forming support holes in a pair of support members that are arranged facing each other at a predetermined interval on the base, align the tightening bolt holes of the pump head cover with the support holes of each support member, and insert the support bolts into them to fasten the pump. It is configured to support and mount the head cover. By using this mounting base, the pump head cover can be stably mounted vertically. Therefore, unlike the conventional case, when performing maintenance and inspection of a heavy pump head cover, it is not necessary to turn upside down, so that the maintenance and inspection can be performed efficiently and promptly.

In the above mounting stand, a wheel device for movement can be provided on the base portion, and a pair of support members can be detachably provided on the base portion. By doing so, a narrow passage can be easily transported with the long-length supporting member removed. Further, in any of the above-mentioned mounting bases, the movement preventing means can be provided at the base portion. With such a movement prevention unit, it is possible to effectively prevent the displacement of the mounting base when mounting the pump head cover on the mounting base. That is, when the pump head cover is hoisted by the hoisting device and positioned on the support member of the mounting table, the positioning can be performed more easily.

Further, according to the above-described method of using the mounting base according to the present invention, the pump head cover can be easily mounted on the mounting base, and it is not necessary to perform an upside down operation.

[Brief description of drawings]

FIG. 1 is a front view of a mounting base according to the present invention.

FIG. 2 is a side view of FIG. 1 viewed from the right side.

FIG. 3 is a plan view of FIG.

FIG. 4 is a partial cross-sectional view showing an example of a large pump.

5 is a perspective view of a pump head cover separated from the pump of FIG.

[Explanation of symbols]

1 pump 2 body 3 Pump head cover 4 Tightening bolt holes 5 Tightening bolt 6 axes 10 Placement stand 11 base 11a lateral member 11b legs 12 Support member 13 Support holes 14 Support bolt 15 wheel device 16 Flexible casters 17 Fixed casters 18 Movement prevention means 19 circular handle 19a screw rod 19b adsorption pad 20,21 Auxiliary support member 22 Fixing bolt

Claims (4)

[Claims] 1. A base for vertically mounting a circular pump head cover 3 having a plurality of tightening bolt holes 4 in the circumferential direction, the base 11 and a pair of supports arranged to face the base 11 at predetermined intervals. A member 12, a support hole 13 provided in each support member 12, and a support bolt 14 that can be inserted into each support hole 13 are provided, and the tightening bolt hole 4 of the pump head cover 3 and the support hole 13 of each support member 12 are aligned with each other. A mounting base for the pump head cover, characterized in that the pump head cover 3 is configured to be supported and mounted by inserting and fastening the support bolts 14 therethrough. 2. The mounting of the pump head cover according to claim 1, wherein a wheel device 15 for movement is provided on the base 11, and a pair of support members 12 is detachably provided on the base 11. Frame. 3. The mounting base for the pump head cover according to claim 1, wherein the base 11 is further provided with a movement preventing means 18. 4. A mounting base for a pump head cover, wherein the pump head cover 3 is vertically mounted on the mounting base according to any one of claims 1 to 3, and the front and back of the pump head cover are inspected. How to use.