JPH08121990A - Device for assembling and releasing heat exchanger - Google Patents

Abstract

PURPOSE: To provide a heat exchanger assembling and releasing device of well efficiency and better workability by a method wherein the right side and the left side of both outer shells of a water chamber and a main body drum are connected by shafts, the shafts are retracted or extended with a sensor hole type hydraulic cylinder to assemble or release the heat exchanger under utilization of opposing reaction forces. CONSTITUTION: Shafts 6 are screwed into fixing fittings 7 and supported at hanger bolts 9 fixed to a main body drum 1 with shuckle pins 8. One of the shafts 6 is inserted into a sensor hole type hydraulic cylinder 12 fixed through a cylinder support 10 to a fixing plate 11. fixed to a water chamber 2 and then the shaft is supported by a nut 13. The main body drum 1 is mounted on rolling boggies 14a, 14b while being coincided with a central height of each of the water chamber 2 and a group of heating pipes, and the other water chamber 2 is rigidly installed with a fastening force overcoming an inserting force of the main body drum 1 at the upper surface of a floor surface 15. A hydraulic ram is installed in such a direction as one to move rearwardly, the shaft 6 is passed through a center hole of the hydraulic cylinder 12 and screwed into the fixing fittings 7 and connected there.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger assembling and opening device, and more particularly to a heat exchanger assembling and opening device installed in a thermal power plant, a nuclear power plant or the like.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 10, a typical structure of a feed water heater set in a thermal power plant, a nuclear power plant or the like is composed of a main body drum 1 and a water chamber 2 and a pipe of the water chamber 2 is removed. The heating pipe 3 is attached to the 2a in a U-shape, and the pipe end 3a is often fixed by welding or the like. Further, the heating tube group is supported by a plurality of support plates 4 at a predetermined interval and is incorporated inside the main body drum 1. In this case, for the heat exchanger having a relatively small capacity, the main body mirror 5 can be attached after inserting the heating tube group in a state where the main body drum 1 is connected to the water chamber tube outlet 2a by welding or the like.

However, there are several tens in a large capacity heat exchanger.
Some of them have a weight of up to a ton. In this case, after the support plate 4 is installed in the body of the water chamber 2 and the heating tube 3 is assembled, the body drum 1 is inserted. In order to insert the inner surface while sliding it, conventionally, as shown in FIG. 8, a wire 20 is often used to pull in the wire using an overhead traveling crane. For this purpose pulley 2
It was necessary to attach the wire 1, wind up the wire 20, tighten the wire 20 into the main body drum 1, and wind up the wire drum 22.

Further, when the main body drum 1 is opened from the water chamber 2 side, as shown in FIG. 9, a pulley table 23 is fixed to the floor behind the main body drum 1 and retracted by an overhead crane. .

[0005]

By the way, when the main body drum 1 is inserted by the wire 20 using the overhead traveling crane shown in FIG. 8, for example, if the main body drum 1 and the tube bundle group are large and heavy, the pulling force can be changed. Since a thick wire was used, winding and winding the wire involved difficult work. Moreover, since the use of the overhead traveling crane is exclusively used for the insertion work of the main body drum 1,
It is not preferable because the overhead traveling crane cannot be used in other work areas in the manufacturing and assembling factory, which causes stagnation of other work. Further, when disassembling and opening the main body drum at the site, it is necessary to fix the pulley base on the pulling side as shown in FIG. 9 by the wire method, and a fixing method is used to provide a floor surface that can withstand the reaction force. It will be a big deal. If you do not have a foundation to attach and fix the pulley base to the work floor,
A special mount and other equipment will be laid. Furthermore, a large number of workers including the operator of the overhead traveling crane were required to insert the main body drum of the large capacity heat exchanger.

Although a device having a wire feeding mechanism utilizing hydraulic pressure is commercially available, it is difficult to mount the device at the left and right hanging ear positions of the water chamber body due to its large structure, so it is different from the water chamber body. However, it takes time for the wire to be stretched and wound, and the reaction force cannot be applied to the movement of the main body drum. The present invention has been made in view of the above circumstances in order to provide a device and a method that can achieve a high efficiency and work efficiency, and an object of the present invention is to provide a high efficiency and workability without using an overhead traveling crane. Another object of the present invention is to provide a heat exchanger assembling and opening device.

[0007]

In order to achieve the above object, claim 1 of the present invention is a heat exchanger comprising a water chamber on the stationary side and a main body drum on the moving side. The chamber and the left and right outer shells of the main body drum are connected by shafts, respectively, and the reaction force is generated by pulling in and pushing out the shafts with a center hole type hydraulic cylinder provided in the fixed side water chamber. It is characterized in that the heat exchanger is assembled and opened by utilizing it.

According to a second aspect of the present invention, in the heat exchanger assembling and opening device according to the first aspect, the left and right shafts are generated when hydraulic pressure is applied to the hydraulic cylinders provided on the left and right sides to pull in and push out the hydraulic cylinders. The feature is that the deviation amount of the movement amount of can be corrected by an adjusting nut attached to one shaft.

According to a third aspect of the present invention, in the heat exchanger assembling and opening device according to the first aspect, a groove is provided on the outer periphery of the shaft in accordance with the stroke pitch of the hydraulic cylinder, and the reciprocating movement of the hydraulic cylinder is repeated. However, it is characterized in that a tightening piece having two cracks is fitted and removed.

According to a fourth aspect of the present invention, in the heat exchanger assembling and opening device according to the first aspect, cotter holes are formed at equal intervals in the longitudinal direction of the shaft in accordance with the stroke pitch of the hydraulic cylinder. The cotter is inserted and withdrawn each time the hydraulic cylinder reciprocates repeatedly.

[0011]

According to the present invention, center hole type hydraulic cylinders are provided on both sides of the fixed side water chamber main body, and a shaft is inserted into the hydraulic cylinder to connect its tip to the main body drum side to move the main body drum by hydraulic pressure. However, the shaft is spliced with a length that is easy to handle so that the shaft can be connected or disassembled repeatedly. In addition, the center hall type hydraulic cylinders installed on the left and right are connected to the hydraulic pump at one location by hydraulic hoses, and are linked together at the same time, and the hydraulic pump is operated by remote control operation at a position easy to monitor and operate.
The main body drum is moved sequentially.

[0012]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a side view of an embodiment of the present invention showing an assembled state of a main body drum, FIG. 2 is a plan view of FIG. 1, and FIG. 3 shows a main body drum using an assembly and opening device of a heat exchanger of FIG. FIG. 4 is a side view showing the opened state, and FIG. 4 is a plan view of FIG.

1 and 2 show the assembled state of the main body drum of the heat exchanger of this embodiment. That is, the shaft 6 is screwed into the mounting bracket 7 and supported by the shackle pin 8 on the hanging ear 9 fixed to the main body drum 1. One of the shafts 6 has a fixed plate 1 fixed to the water chamber 2.
1 is inserted into a center hole type hydraulic cylinder 12 attached via a cylinder support 10 and is supported by a nut 13.

The main body drum 1 is provided to facilitate insertion.
It is mainly mounted on the rolling gullies 14a and 14b so as to match the center height of the water chamber 2 and the heating tube bundle group, and one water chamber 2 has a tightening force to overcome the insertion force of the main body drum 1 on the upper surface of the floor surface 15. Is rigidly installed.

Further, the drive mechanism of the shaft 6 is inserted into a center hole type hydraulic cylinder 12 as shown in FIG.
The shaft 6 is provided with a groove P on the outer circumference at the same pitch l ₂ as the operation stroke l ₁ of the center hole type hydraulic cylinder 12, and the split piece 16 is fitted thereinto, so that the sleeve 1
It is supported by a ram 12a of a center hole type hydraulic cylinder 12 by an adjusting nut 18 screwed in 7.

By the way, in FIG. 2, when tension is applied to the shafts 6 and 6a to the left and right to cause the position of the adjusting nut 18 to be displaced, after adjusting with one adjusting nut 18, the left and right center hole hydraulic cylinders 12 are adjusted. At the same time, hydraulic pressure is applied to pull in the shaft 6 to move the main body drum 1. In this way, the clamp 16 and the unclamp of the piece 16 are repeated by the length of the groove pitch l ₁ of the shaft 6 to sequentially pull in the main body drum 1 and bring it closer to the water chamber 2 side.

When the main body drum 1 is to be inserted into the fixed bundle of tube bundles, the hanging ears 9 to which the mounting brackets 7 are attached are attached to both sides of the main body drum 1. A center hole type hydraulic cylinder 12 is fixed to the fixed side water chamber main body 2 via a cylinder support 10 and mounted in a direction in which a hydraulic ram 12a operates rearward, and a shaft 6 is passed through a center hole of the hydraulic cylinder to the main body drum 1 side. Connect it to the mounting bracket 7 by screwing. The shaft 6 is provided with, for example, a groove that matches the pitch of the hydraulic cylinder 12, and a halved piece is fitted into the shaft to push the ram 12a by operating the hydraulic pressure to pull the shaft 6 and move the main body drum 1 to move the hydraulic cylinder. By repeating the reciprocal movement, the tubes can be sequentially inserted into the tube bundle side.

3 and 4 show a state in which the main body drum of the heat exchanger of this embodiment is opened. That is, when the main body drum 1 is released from the water chamber 2, the fixed plate 1
The cylinder support 10 pinned to 1 is rotated together with the center hole type hydraulic cylinder 12, the ram 12a is directed toward the main body drum 1 side, and the shaft 6 is passed through in the same manner. The main drum 1 can be released from the water chamber 2 side by pushing the shaft 6 out.

The shaft 6 is connected by screws 6C as shown in FIG. 5 and adjusted to an arbitrary length in order to facilitate disassembly, assembly and the like. Further, the end surface on the main body drum 1 side is screwed into a mounting member 7 as shown in FIG. 6, fixed to the main body drum 1 by a shackle pin 8 and supported by a hanging ear 9.

As described above, according to this embodiment, the main body drum 1 is installed and released by utilizing the reaction force due to the hydraulic pressure at the time of pulling in and moving out of the fixed side and the moving side without using the overhead traveling crane. be able to.

FIG. 7 is a sectional view of a shaft drive mechanism according to another embodiment of the present invention. The difference between the present embodiment and the shaft drive mechanism of FIG. Although a groove is provided on the shaft in accordance with the stroke of the hydraulic cylinder and the shaft is fixed by a split piece, in this embodiment, a cotter hole 6d into which the cotter 19 can be inserted is provided in accordance with the operating stroke of the hydraulic cylinder. Only the point that the shaft 6 is configured to be fed in is the same, and the other configurations are the same, so duplicated description will be omitted. It goes without saying that this embodiment can also obtain the same effects as those of the above embodiment. Needless to say, if the shaft 6 has sufficient strength, it is preferable to use a hollow pipe because the weight is lighter.

[0022]

As described above, according to the present invention,
Since it is possible to assemble and open the main body drum with a simple device that uses hydraulic cylinders, without using an overhead traveling crane at the production of the heat exchanger and the site of the power plant,
It is possible to eliminate the problem of bending of the bundle of tubes due to the unbalance phenomenon of the left and right feed due to the looseness of the wire or the looseness of the wire clamp when using a wire like the conventional device, and between the fixed side and the moving side. Connected with a shaft that has sufficient tensile force and buckling force,
By applying a reaction force to both, insertion and extrusion can be performed easily, and an assembly and opening device for a heat exchanger with good efficiency and workability can be provided.

[Brief description of drawings]

FIG. 1 is a side view showing an assembled state of a main body drum according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view showing an opened state of a main body drum using the assembly and opening device of the heat exchanger of FIG.

FIG. 4 is a plan view of FIG. 3;

5 is a cross-sectional view of the drive mechanism of the shaft of FIG.

6 is a cross-sectional view of a fixing portion of the shaft of FIG. 1 on the main body drum side.

FIG. 7 is a sectional view of a shaft according to another embodiment of the present invention.

FIG. 8 is a side view for explaining drawing in of a conventional main body drum.

FIG. 9 is a side view for explaining retraction of the main body drum by another conventional method.

FIG. 10 is a cross-sectional view of a conventional steam turbine heat exchanger.

[Explanation of symbols]

1 ... Main body drum, 2 ... Water chamber, 2a ... Tube removal, 3 ... Heating tube,
3a ... Pipe end part, 4 ... Support plate, 5 ... Main body mirror, 6 ... Shaft, 7 ... Mounting bracket, 8 ... Shackle pin, 9 ... Suspended ear, 1
0 ... Cylinder support, 11 ... Fixing plate, 12 ... Cylinder, 12a ... Hydraulic drum, 13 ... Nut, 14a, 14
b ... carriage, 15 ... floor, 16 ... pieces, 17 ... sleeve, 1
8 ... adjusting nut, 20 ... rope, 21 ... pulley, 22 ... wire drum, 23 ... pulley stand.

Claims (4)

[Claims] 1. A heat exchanger comprising a fixed-side water chamber and a moving-side main body drum, wherein left and right outer shells of the water chamber and the main body drum are connected by shafts, respectively.
A center-hole type hydraulic cylinder provided in the fixed-side water chamber pulls in and pushes out the respective shafts to assemble and open the heat exchanger by utilizing opposing reaction forces. Assembly and opening device for heat exchangers. 2. The heat exchanger assembling and opening device according to claim 1, wherein the displacement of the left and right shafts is generated when the hydraulic cylinders provided on the left and right are actuated by hydraulic pressure to pull in and push out. A heat exchanger assembling and opening device, characterized in that the amount can be adjusted by an adjusting nut attached to one shaft. 3. The heat exchanger assembling and opening device according to claim 1, wherein a groove is provided on an outer circumference of the shaft in accordance with a stroke pitch of the hydraulic cylinder, and the hydraulic cylinder is repeatedly reciprocated to tighten a crack in two. A heat exchanger assembling and opening device, characterized in that a fitting piece is fitted and removed. 4. The heat exchanger assembling and opening device according to claim 1, wherein cotter holes are formed at equal intervals in the longitudinal direction of the shaft in accordance with the stroke pitch of the hydraulic cylinder, and the reciprocating motion of the hydraulic cylinder is repeated. A heat exchanger assembling and opening device characterized in that the cotter is inserted and withdrawn each time.