JPH0248144A - Cooling tube inserting device for condenser - Google Patents

Abstract

PURPOSE:To insert a cooling pipe, accurately and speedily, in the tube plate of a condenser main body by providing an inserting machine and a tube receiving base on a lift stage in such a way as to be freely moved in the vertical and lateral direction. CONSTITUTION:The base part of an inserting machine 3 is guided on rails 7 for laterally moving the inserting machine in a freely lateral movement and the base part of a tube receiving base 4 is guided on rails 8 for laterally moving the receiving base in freely lateral movement. In this case, there are mounted 1 to 15 of cooling tubes 6 on the guide roller 12 of the tube receiving base 4. Further, the inserting machine 3 and tube receiving base 4 are matched in the tube insertion holes of the tube plate of a condenser 5, thus performing the centering thereof. Next, the cooling tubes 6 on the tube receiving base 5 are supplied to the inserting machine 3. Thus, the cooling tubes 6 are inserted into the condenser 5. The inserting machine 3, tube receiving base 4 and, if necessary, lift stage 2 are moved at the next insertion position. By repeating the above operation, it is possible to speedily insert plural cooling tubes in the condenser 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an insertion device used for inserting a cooling pipe into a main condenser body installed in a turbine building of a power plant.

[Traditional technique]

The work area for assembling and inserting the main condenser cooling pipes during the construction of a large-capacity power plant is approximately 10 meters high, 7 meters wide, and 20 meters deep. The number of cooling tubes per main condenser reaches 15,000. Therefore, for example 1,100 M
The W power plant requires three main condensers, which cost approximately 45,000 yen.
This requires the insertion of as many as 1,000 cooling pipes.

This method of inserting a large number of cooling pipes has conventionally been carried out as shown in FIG. That is, a foundation frame 1 is installed adjacent to the condenser 5, and a lift stage 2 that can be raised and lowered is provided on the foundation frame 1. Then, the lift stage 2 is moved up and down by the stage raising/lowering motor 14 to maintain it at a height that is easy to work with when inserting the cooling pipe 6 into the condenser 5. This lift stage 2 has a motor 14 for raising and lowering the stage.
After all the cooling pipes 6 are inserted into the pipe insertion holes on the same level, they are aligned to the next level. To temporarily insert the cooling pipe 6 into the condenser 5, place the cooling pipe packaging box on the lift stage 2, and manually insert the cooling pipe into the condenser while taking out the cooling pipe from the packaging box. Was. The length of this cooling pipe is, for example, about 16 m, and about 6 to 8 workers were temporarily inserted into the pipe while carefully holding the cooling pipe 6 spaced apart in the longitudinal direction.

[Problem to be solved]

However, according to this method, even if the lift stage 2 can be moved up and down, manually inserting the 16 m long cooling pipe 6 causes the pipe 6 to bend, and the cooling pipe 6 is bent during the insertion process. There is a risk of damage. Additionally, there is a risk of damage to the cooling pipes during operation due to human error. Moreover, since a huge amount of cooling pipes 6 are inserted, there is a problem in that efficiency decreases due to fatigue caused by long hours of work.

[Means to solve the problem]

Therefore, in order to improve the above-mentioned problems, the present invention aims to improve the cooling pipe 6.
is held horizontally at 1 ThN on the lift stage 2 and moved in parallel to eliminate deflection of the cooling pipe and prevent damage to the cooling pipe during insertion work. The purpose is to provide a device that can reduce worker fatigue and facilitate centering work when inserting the cooling pipe 6.
In order to achieve this purpose, we will adopt the following structure.

That is, the base frame 1 is positioned adjacent to the condenser main body and in the cooling pipe insertion direction. Then, a lift stage 2 is attached to the foundation frame 1 so that it can be driven up and down. Further, an insertion machine 3 is installed on the lift stage 2F on the side closer to the condenser main body.

The insertion machine 3 is configured to move horizontally on the lift stage 2 perpendicular to the insertion direction and to be able to move up and down, and has an insertion drive mechanism that moves the cooling pipe 6 in its axial direction. Further, on the opposite side of the condenser to the insertion machine 3, a tube support stand 4, which is considerably longer than the insertion machine 3, is installed. In this tube holder, a stand 4 is installed on a lift stage 2 so as to be able to move up and down and move horizontally independently of the insertion machine 3, and a plurality of guide rollers 12, which horizontally support the lower surface of the cooling tube 6, are moved toward each other in the tube axis direction. It should be kept separate.

〔Example〕

Next, an example of this device will be described.

FIG. 1 is an overall schematic diagram of the device. In this device, a lift stage 2 is provided on a base frame 1 and is movable up and down. This lift stage 2 serves as a workbench that is long in the direction in which the cooling pipe 6 is inserted. And the basic frame 1
The lift stage 2 is driven up and down by a stage lifting motor 14 provided at the upper end of a concave arch erected above. Since the lift stage 2 is extremely heavy, its lifting and lowering operations are performed slowly. Next, on this lift stage 2, a pair of rails 7 for traversing the insertion machine are provided in parallel at the front end, and three rails 8 for traversing the platform are laid in parallel with each other, and are spaced apart from each other in the front and rear. .

Then, the base of the insertion machine 3 is guided on the rail 7 for horizontal movement of the insertion machine, and the receiver is for horizontal movement of the table! The base of the base 4 of the tube holder is guided on the rail 8 so that it can move freely.

The base 4 of this tube holder is formed as shown in FIGS. 2 and 3. That is, FIG. 2 is a side view thereof, and FIG. 3 is a front view thereof. In this tube holder, the length of the stand 4 is considerably longer than its width, for example, about 15 to 16 m. In this tube holder, the stand 4 is installed on the base via the lifting device 13,
The wheels 9 provided on the lower surface of the base are respectively guided by the supports on the lift stage 2 by rails 8 for traversing the platform. In this tube holder, a pinion 11 and a rack 10 mesh with each other to drive the table 4 laterally. By regulating the rotation angle of the pinion 11, the tube holder positions the base 4 in the width direction. In addition, the lifting device 13 of the tube support stand 4 is moved up and down steplessly by a hydraulic cylinder 16. Next, the tube holder has the first
As shown in the drawings and FIG. 3, a large number of guide rollers 12 are rotatably arranged apart from each other in the direction in which the cooling pipe 6 is inserted. Most of the large number of guides 12 have a cylindrical outer periphery. The guide rollers 12 at both front and rear ends and in the center each have, for example, a large number of grooves formed on their outer peripheral surfaces, and have a shape similar to the grooved roller 18 shown in FIG. The kite roller 12 is made of a material such as polyurethane rubber, for example, and is formed so as not to scratch the surface of the cooling pipe 6. Next, in front of the tube support stand 4, an insertion machine 3 as shown in FIGS. 6 and 7 is positioned. The sixth time is a side view of the insertion machine 3, and FIG. 7 is a front view thereof. This insertion machine 3 moves horizontally as wheels 9 attached to its lower end are guided by rails 7 for horizontal movement of the insertion machine, as shown in FIG. A traverse motor 19 is provided for this traverse operation. In addition, a part of the insertion machine 3 includes a lower pair of pressure rollers 21. ■Grooved roller 18
is provided. This grooved roller 18 is rotationally driven by the insertion motor 17.

Further, the pressure roller 21 facing the grooved roller 18 is pressed downward by a pressure set by the pressure cylinder 20. Cooling pipes 6 are inserted between the grooves of the pressure roller 21 and the grooved roller 18, respectively, as shown in FIG.

The pressure roller 21 and the V-grooved roller 18 each consist of a roller having a large number of grooves. These rollers, the insertion motor 17, and the pressure cylinder 20 constitute an insertion drive mechanism 26. This figure 6 and 7
FIGS. 8 and 9 depict the inserter 3 shown in more detail. This insertion machine 3 roughly moves in the width direction by a traverse motor 19 provided at its lower end. Then, the base of the insertion machine 3 is fixed using the locking handle 22, and the positioning in the width direction is manually finely adjusted using the lateral movement handle 23. Further, the vertical movement is finely adjusted using the elevating handle 24 shown in FIG.

for〕 Next, the operation of the present invention will be explained.

This device is removably installed adjacent to the condenser 5. First, the foundation frame 1 is installed on the floor,
A lift stage 2 is installed on the foundation frame 1, and a tube holder is mounted on the lift stage 2F. An insertion machine 3 is installed.

The cooling pipe 6 can be inserted into the condenser 5 in the following order. A tube packaging box carry-in stand 15 containing cooling tubes 6 is placed on the lift stage 2. Next, the stage lifting motor 14 is driven to maintain the lift stage 2 at an appropriate height.

The lift stage 2 is guided by a concave arch of the base frame 1 via guide rollers (not shown), and is firmly held so as not to swing. Next, the cooling tube packing boxes on the tube packing box carry-in stand 15 are unpacked on the lift stage 2, and conical guides (arrows) not shown are attached to the insertion side tips of the respective cooling tubes 6. Next, attach the cooling pipe 6 to the tube holder on the stand 4.
1 to 15 rollers are placed on the guide roller 12 of.

[Next, the inserter 3 and the tube holder 4 are aligned with the tube insertion holes of the tube plate (not shown) of the condenser 5, and centering is performed. This centering can be performed using the insertion machine 3 and the scale meter attached to the tube holder 4.

First, to center the inserter 3, as shown in FIG. 9, the traverse motor 19 is driven, and the entire inserter 4B, 3 is traversed and stopped at an appropriate position. Then, the locking handle 22 locks the space between the lower part of the insertion machine 3 and the rail 7 for traversing the insertion machine. Next, the lateral movement handle 23 in FIG. 9, the elevation handle 242 in FIG. and,
The cooling pipe 6 held between the pressure roller 21 and the grooved roller 18 is positioned so as to be aligned with the tube insertion hole of the tube plate. Next, centering of the tube holder 4 is performed by driving a pinion 11 in the width direction as shown in FIGS. 2 and 4, and a hydraulic cylinder 16 shown in FIG. 5 in the vertical direction.
This is done by going up and down. Next, the tube holder supplies the cooling tube 6 on the table 4 to the insertion machine 3. Then, the tip thereof is held between the pressure roller 21 and the V-grooved roller 18.

Next, the insertion motor 17 is driven to insert the cooling pipe 6 into the condenser. Next, the insertion machine 3° tube holder moves the platform 4 and, if necessary, the lift stage 2 to the next insertion position. Since the cooling pipes of the condenser 5 are arranged at a fixed pitch, it is efficient to use the insertion machine 3 and the tube holder if they can be moved using the scale meter on the stand 4. By repeating the above operations, a large number of cooling pipes 6 can be quickly inserted into the condenser 5.

〔Effect of the invention〕

In the cooling tube insertion device of the present invention, the insertion machine 3 and the tube holder 4 are respectively positioned on the lift stage 2, and furthermore, they are provided so as to be movable vertically and horizontally on the lift stage 2. The cooling pipe 6 can be held horizontally without being distorted, and the pipes of the condenser main body can be inserted accurately and quickly. That is, the lift stage 2 allows the tube holder to lift the table 4 and the insertion machine 3 to a relatively rough vertical position, and fine adjustment in the vertical direction and horizontal adjustment can be made on the lift stage 2. This allows the tip of the cooling pipe 6 to be quickly and reliably aligned with the tube insertion hole number of the tube plate of the condenser main body. Moreover, in this device, the insertion machine 3 and the tube holder can be moved up and down and traversed independently of each other, so that the axis in the tube insertion direction of the cooling tube insertion drive mechanism of the insertion machine 3 adjacent to the condenser can be aligned with the tube plate. It can be quickly aligned with the axis for tube insertion. And inserter 3
Since the tube holder 4, which is significantly longer than the holder 4, is separated from the insertion machine 3 and located further away from the condenser main body, its function can be achieved by relatively rough alignment.
The insertion device as a whole can be quickly aligned for temporarily inserting the cooling tube 6. Furthermore, since both the insertion machine 3 and the tube holder are located on the same lift stage 2, even if the lift stage 2 is moved up and down, the insertion machine 3 and the tube holder are placed on the same lift stage 2. There is no relative movement, and the amount of work required for vertical alignment is reduced accordingly, simplifying the operation.

According to the invention described in claim 2, since a plurality of cooling pipes can be inserted into the condenser main body at the same time, the insertion work can be performed more quickly.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the device of the present invention, FIG. 2 is a side view of the base 4 in which the tube holder is installed, FIG. 3 is a front view of the same, and FIG. pinion 11 and rack 10
5 is an explanatory diagram of the elevating device 13 of the tube holder 4, FIG. 6 is a schematic side view of the inserter 3, FIG. 7 is a front view thereof, and FIG. 8 is a detailed diagram of the inserter 3. 9 is a front view of the same, and FIG. 10 is an explanatory diagram of the conventional device. 1...Foundation frame 2...Lift stage 3.
... Insertion machine 4 ... Tube holder is total ... Condenser
6...Cooling pipe 7...Rail for traversing the insertion machine 8...Rail for traversing the platform 9...Wheel 10...Rack 11...
Pinion 12...Guide roller 13...Elevating device 14...Motor for raising and lowering the stage 15...Tube packaging box loading frame 16...Hydraulic cylinder 18...■Grooved roller 20...Pressure cylinder 22... Lock handle 23... Lateral movement handle 24... Lifting handle 2
5... Back and forth movement handle 26... Insertion drive mechanism

Claims (1)

[Claims] 1) A foundation frame (1) located adjacent to the condenser and in the cooling pipe insertion direction thereof, and a lift stage (2) attached to the frame (1) so as to be movable up and down. is installed on the lift stage (2) on the side closer to the condenser main body, is configured to run horizontally on the stage (2) orthogonally to the insertion direction, and is movable up and down; Pipe (6
an inserter (3) having an inserting drive mechanism in which the condenser (3) is transported in its axial direction; A plurality of guide rollers ( 12
) are spaced apart from each other in the tube axis direction, and the insertion machine (
A pipe holder (4) whose length is significantly larger than that of 3);
A condenser cooling pipe insertion device comprising: 2) Claim 1, wherein the insertion machine (3) has the drive mechanism that simultaneously transfers a plurality of cooling tubes, and the tube holder is configured to simultaneously support a plurality of cooling tubes. The device described.