KR101224968B1 - Exchange method of valve for intake tower - Google Patents

Abstract

PURPOSE: An exchange method of a valve for an intake tower is provided to improve workability and stability by stabilizing the exchange work of valve components. CONSTITUTION: An exchange method of a valve for an intake tower is as follows. First and second winches(20,20a) are installed in an intake tower(100). A cage(22) is installed on the bottom end of the first winch. A barge(30) floats on the water nearby the intake tower. The front portions of intake pipes(12) are cut, and the cut front portions are loaded on the barge to be transferred to land. The cut planes of the intake pipes are grinded. Valve components(31) required for exchanging a valve are loaded on the barge, and the barge moves to the intake tower. Fitting connection pipes(18) are inserted into the intake pipes. The fitting positions of the fitting connection pipes are adjusted. The fitting connection pipes are welded to the intake pipes. Valves are installed in the fitting connection pipes, and components are installed therein. The cage and the first and second winches are removed from the intake tower.

Description

Exchange method of valve for intake tower

The present invention relates to a method of replacing the intake tower valve, and more particularly, after two winches and one chain winder are detachably installed at the upper portion of the intake tower, one winch is used to carry out work required by the operator. Install a cage, and another winch allows the valve components on the barge to be moved to the working position, and after cutting the distal end of the old intake pipe, the fitting pipe with a flange is inserted into the intake pipe and welded. By fitting the fitting position of the fitting tube to the lower end of the chain of the chain winder by welding and fitting the fitting connector by welding to the intake pipe with the fitting connector inserted in the correct position. This is to allow easy replacement of components in the shortest time.

In general, the intake tower refers to a tower installed to draw water from a large reservoir or a dam, and the water collected through the intake tower is used as a drinking water source or other industrial and agricultural water.

As shown in FIG. 1, the intake tower 100 is provided with a base using concrete on the bottom surface of a reservoir or a dam (hereinafter referred to as a dam 1), and an intake well 2 is disposed above the base. The top of the tower (3) having a cylindrical shape is provided, and the upper chamber of the tower (3) has a control room (6) connected to the dam (1) and the bridge to enable the operation required for the intake and control of the intake tower (100) Is installed.

In addition, in the tower body 3, several intake holes 4 for introducing water stored in the dam 1 into the intake well 2 are formed at intervals in the vertical direction so that active intake is possible even in the water level change of the dam. Outside the respective water intake holes (4), the valve device 10 for introducing and blocking the water filled in the dam (1) to the intake well (2), and the water taken in and stored in the intake well (2) as a water source The supply pipe 5 for supplying is connected.

The valve device 10 is installed outwardly in the intake hole 4 of the top body 3, and the intake pipe 12 is installed with bolts 12b on the inclined front outer surface and the intake hole 4 The valve 14a coupled to the rear flange portion of the water intake pipe 12 inserted into the top of the tower body 3 through the bottom and installed downward in the bottom of the control chamber 6 to the upper portion of the valve 14a. It consists of a rotary drive means (8a) for driving the valve shaft upwardly installed, and a valve shaft connecting rod (9) for connecting the valve shaft and the rotary drive means in the vertical direction, the valve (14a) is the inner side of the top body (3) It is installed to be supported by the pedestal 16a formed in the base.

The rotary drive means (8a) is a manual rotary drive means such as a conventional operation handle or operation bar, but in recent years is installed by using an electric rotary drive means to be rotated by the driving force of the drive motor, in the present invention, this valve The soccer copper motor 8 is called.

When the water level of the dam is close to the full water level, the water intake tower is controlled by controlling a valve located on the upper side of the tower, and when the water level of the dam is a low water level, the water intake is controlled by a valve located at the lower side of the tower.

As the water tower is conventionally installed together when the reservoir or dam is constructed, the history of the water tower is the same as that of the dam, so it should be considered to be at least 20 to 30 years old.

In particular, considering that the average depth of the dam is about 30 m, the valve components around the valve including the valve of the intake tower are always submerged. In general, the valve device is made of water for a long time. It is presently present that there is something that is corrosive and malfunctions in the state of exposure to water.

If the valve device provided in the water intake tower does not operate smoothly due to corrosion or poor maintenance, the foreign matter dropped out of the water intake process may be supplied to the water supply while being introduced into the intake well during the intake process. There was a problem that the closure of the water intake tower is lost due to the closure.

Therefore, the valve replacement business has been in progress for many years, the conventional valve replacement method is as follows.

First, the "a" part of Figure 1 shows a state in which the valve device 10 is installed in the conventional water intake tower 100, "I" represents a state in which the valve device is installed by a conventional replacement method, "d" is conventional It shows the process of replacing the valve device by the replacement method.

That is, in the conventional valve replacement method, the diver must submerge into the water in which the valve to be replaced is removed to remove the strainer 12b which is installed by bolts on the inclined front side of the intake pipe 12, as mentioned above. As the conventional valve device 10 is immersed in water for 20 to 30 years, each of the components constituting the conventional valve device 10 are all corroded.

Since the valve components are all corroded, the bolts fastened to the inclined front outer surface of the intake pipe 12 cannot be loosened, and the strainer 12b can not be disassembled normally. The bolt portion and the strainer portion are cut out, and the inclined flange portion (hereinafter referred to as the inclined flange portion 12-1) of the front and outside of the water intake pipe 12 is ground with a grinder to grind the inclined flange portion 12-1. The surface of the machine should be smooth.

Afterwards, the inclined flange portion (hereinafter referred to as a rear inclined flange portion) behind the connecting pipe 12c to connect the connecting pipe 12c whose rear surface is inclined and the front is vertical to the inclined flange portion 12-1 of the intake pipe. A hole having the same size and spacing as the bolt insertion hole formed in (12C-1)) should be processed in water in the inclined flange portion 12-1 of the intake pipe 12. There is a difficult problem.

That is, the connection pipe 12c is manufactured by casting on land, and its outer diameter is very large as 1650 mm, and 30 bolt insertion holes are formed to penetrate the rear inclined flange portion 12C-1. In the inclined flange portion 12-1 of the water intake pipe 12, the work of forming a through hole in the water at the same position as the 30 bolt insertion holes in the rear inclined flange portion 12C-1 of the connection pipe 12c is very effective. It is difficult.

When 30 through holes are formed in the inclined flange portion 12-1 of the intake pipe 12 in the water, the parts formed by welding after first forming the through holes and the slit net are newly formed. When overlapping, it is impossible to form a through hole accurately in the portion, and even if one of the 30 through holes is not accurate, the connection pipe 12c cannot be connected to the intake pipe 12, so that the intake pipe 12 The work of forming through the 30 through holes in the inclined flange portion 12-1 and the connection of the connection pipe to the intake pipe is very difficult and there is a problem that takes a lot of work time.

After connecting the connection pipe 12c to the water intake pipe 12 by the above-mentioned difficult operation, a new valve 14 is installed on the vertical front flange of the connection pipe 12c, and the screen in front of the valve 14 is installed. The pipe 17 is provided, and the valve 14a inside the water intake well 2 which was conventionally installed is left open.

Thereafter, the rotary driving means 8a is installed downward on the slab above the top of the top body 3, and the length is increased vertically between the drive shaft installed downward on the rotary driving means 8a and the valve shaft of the newly installed valve 14. The long valve shaft connecting rod 9 is connected to complete the conventional valve replacement work.

If the water intake pipe 12 and the connection pipe 12c are inclined even by a minute angle in the process of replacing the valve as described above, the valve shaft of the valve 14 is not precisely installed in the vertical direction, and is squeaky. It is erected so that the drive shaft of the rotational drive means (8a) is downwardly installed in the vertical direction precisely with a stiff valve shaft does not match.

Nevertheless, when the degree of inclination of the valve shaft is insignificant, the valve shaft connecting rod 9 is connected between the valve shaft and the driving shaft of the rotary driving means, and the rotary driving means is driven. Since the load is generated in the drive unit of the rotary driving means, as well as the damage to the rotary driving means, and in severe cases, there is a problem that can not open and close the valve.

Since the length of the valve shaft connecting member 9 is about 30 meters long, the width of the valve shaft connecting member 9 increases as the upper side increases even though the inclination angle of the valve side is insignificant from the lower side. The connection with the drive shaft of the drive means becomes impossible.

Therefore, in the construction specification of the Korea Water Resources Corporation, which manages valve replacement, the valve shaft is inclined to 4.5 ° around a vertical line in consideration of the situation in which the valve shaft of the valve installed in front of the intake pipe 12 cannot be accurately installed. In addition to this, it is recommended that the long valve shaft connecting member 9 be installed with a universal joint.

Even when the long valve shaft connecting member 9 is installed with the universal joint as described above, when the angle in which the valve shaft is inclined is as large as about 4.5 °, the upper end of the valve shaft connecting member 9 and the drive shaft of the rotary drive means There was a problem in that the load is applied at the connection portion does not open and close the valve 14 smoothly.

In the conventional valve replacement method, a buoyancy tube (not shown) is floated on the water surface of a dam or reservoir in which the water intake tower 100 is installed, and the buoyancy tube is loaded with a valve component for valve replacement. The buoyant tube containing the valve components is submerged to the valve replacement work position.

In the process of submerging the buoyancy tube in the water, the buoyancy tube loaded with valve components does not come down to the valve replacement work position, and the wire is connected to the buoyancy tube to the working position, and the wire is pulled close to the working position. Bind to position.

With the buoyancy tube loaded with the valve components positioned close to the working position, the valve component mounted on the buoyancy tube is lowered and brought to the welding position, and then the work required by the workers while holding the valve component by hand. Run

When lowering the valve component mounted on the buoyancy tube in the course of performing such a series of operations, the buoyancy tube is shaken in the water by the operator's movement and the weight of the valve component is difficult to work.

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Patent Registration No. 10-0444752 (Invention name: Valve replacement method and device for water intake tower)

The present invention is to solve the above problems, after the two winch and one chain winder is detachably installed on the top of the water intake tower, one winch cage that can be carried out by the operator to work required And another winch to move the valve component on the barge to the working position, and after cutting the distal end of the old intake pipe, insert a fitting connector with a flange in the intake pipe and join it by welding. By fitting the fitting position of the fitting tube to the lower end of the chain released from the chain winding machine, the fitting connector is welded to the inlet pipe with the fitting connector inserted in the correct position. It is a technical problem to be able to easily replace and install in the shortest period of time.

The present invention for achieving the above object, the step A to install the first and second winches on the upper portion of the water intake tower, and the step B to install the cage to the operator to the lower end of the chain released from the first winch, Step C, which puts a barge on the surface of the water intake tower, and the worker rides down the cage to the valve replacement position, cuts the distal end of the old water intake pipe, and loads the cut portion cut by the second winch on the barge to transport to the land. Step E, grinding the cut surface of the intake pipe cut at the tip end, F step of moving the barge close to the intake tower after loading the valve components necessary for valve replacement on the barge, and at the top of the intake tower. This is a chain released from the installed second winch, and the fitting connector made on land among the valve components shipped on the barge is moved to the valve replacement position. Step G, which is inserted into and installed in the intake pipe cut out, and step H, which adjusts the fitting position of the fitting connector inserted into the intake pipe, and the fitting connector which is adjusted by adjusting the fitting position in H, are welded to the intake pipe. In step I and step J, the valve is installed on the outer flange of the fitting pipe installed in step I, and the valve components are combined and installed in the corresponding position, and the step K and the winch are removed from the intake tower. Characterized in that consists of.

Intake valve replacement method of the present invention as described above, by hanging the cage on the lower end of the winch detachably installed in the intake tower cut the inclined end portion of the intake pipe in the state that the worker is safely lowered to the working position and the fitting pipe Can be performed in a stable posture by combining the welding by welding and replacing the valve component, thereby ensuring the workability and stability.

In addition, the fitting pipe manufactured on land is fitted to the intake pipe cut off the tip, and the fitting connector is welded to the intake pipe by welding in the state where the fitting position is specified by the weight installed at the bottom of the chain winder, By designating with the weight in the installation direction of the valve shaft when installing the valve, it is possible to quickly install the fitting tube in the correct position, and the valve shaft is installed so that it is vertically precisely, it is possible to quickly install the valve in the correct position It works.

In addition, the work period for installing the entire valve device including the valve from the step of the worker descending to the working position through the winch is greatly reduced, thereby greatly reducing the construction cost.

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1 is a cross-sectional view showing a conventional intake tower valve replacement method.
Figure 2 is a cross-sectional view showing a water intake tower in which the valve is replaced by the present invention.
Figure 3 is an enlarged cross-sectional view of the valve replacement portion according to the present invention.
4 is a cross-sectional view showing a cutting and welding process of the present invention.
5 is a cross-sectional view showing a process in which the work is performed in a state in which the winch and the chain winder, which are the main parts of the present invention, are installed in the water intake tower.
Figure 6 is an enlarged structural view of the chain winding machine installed in FIG.
Figure 7 is a process diagram showing an embodiment of the intake tower valve replacement method according to the present invention.
8 is a process chart showing this embodiment of the intake valve replacement method according to the present invention.

Hereinafter, a description will be given with reference to the accompanying drawings, Figures 2 to 8 with respect to the intake valve replacement method according to the present invention.

7 is a process chart showing an embodiment of the intake valve replacement method according to the present invention.

That is, one embodiment of the present invention, as shown in Figures 2 to 7 A step 101 of hypothesizing the first and second winch (20, 20a) in the water intake tower 100, and the first winch 20 B stage 102 to install the cage 22 at the lower end, C stage 103 to float the barge 30 on the water surface near the water intake tower 100, and the cutting portion after cutting the tip of the intake pipe 12 Step D (104) for loading (11) to the barge 30 and transporting it to the land, step E (105) for grinding the cut surface 12a from which the front end of the intake pipe 12 is cut, and the barge 30 Step F (106) for loading the valve component 31 necessary for valve replacement and moving to the water intake tower (100), and inserting the fitting tube (18) into the water intake pipe (12), H step 108 for adjusting the fitting position of the fitting connector 18, I step 109 for joining the fitting connector 18 with the intake pipe 12 by welding, and the fitting connector 18 In addition to installing the valve (14), each component of the valve device (10) is installed. J is made the step of 110, a cage 22 and the first and second winch (20,20a) to phase K (111) for stripping at chwisutap 100.

The step A 101 is a valve component mounted on the first winch 20 and the barge 30 to raise and lower the cage 22 on the upper portion of the intake tower 100 in which the control chamber 6 is installed as shown in FIG. 5. Supplying 31 to the valve replacement position and constructing the second winch 20a for loading the cut-off portion cut off the tip of the intake pipe to the barge 30, each of the first and second winches 20 and 20a. Hypothesis is because the first and second winches (20, 20a) are not used after the valve replacement work is completed.

Step B 102, which is performed after the first and second winches 20 and 20a are hypothesized in step A 101, is installed at the lower end of the chain 21 released from the first winch 20. Installation step is to hang the cage 22 to be boarded by the worker to the ring.

The step C (103) performed after the step B (102) is a step to float the empty barge 30 on the surface of the water intake tower 100, the barge 30 can be loaded on the vehicle in the barge manufacturing plant on land Several pieces of barge made to be separated and assembled in size are loaded on a vehicle, moved to the construction site of the water tower, and then assembled at the construction site of the water tower and floated on the water surface.

D step of cutting the tip of the intake pipe 12 in the state of floating the barge 30 on the water surface around the water intake tower 100 as described above and loading the cut portion 11 to the barge 30 to transport it to the land ( 104. In the D step 104, the first winch 20 is moved to the valve replacement position while the operator rides in the cage 22 installed in the B step 102. The outer leading end of the water intake pipe 12 provided with a strainer bolt is cut by a cutter.

At this time, the intake pipe 12 is initially formed to be inclined in the front side as shown in Figure 4, the sieve net 12b is installed on the front, but they are immersed in water for 20 to 30 years, so that all the rust is separated Since it is a very difficult state, the main body portion of the water intake pipe 12 is vertically cut so that the cut surface 12a is in a vertical state, and the cut and cut portions are triangular when viewed from the side, which is called a cut portion 11. .

The cut portion 11 thus cut is mounted on a barge provided at the lower side of the second winch 20a and loaded on a barge 30 anchored to the water surface around the water intake tower 100 to move to the land.

After cutting the tip 11 of the water intake pipe 12 as described above to the barge 30 to move to the land and cut the front end of the water intake pipe 12 in the state in which the operator is riding on the cage 22 Step E105 of grinding (12a) with a grinder is executed.

After performing step E 105 as described above, after loading the valve component 31 required for valve replacement on the barge 30, the barge 30 is moved closer to the water intake tower 100 and anchored. F step 106 is executed.

After step F 106, manufactured on land among the valve components 31 shipped to the barge 30 by the hooks provided at the lower end of the chain 21a released from the second winch 20a installed at the upper portion of the water intake tower 100. G step 107 of lifting up the fitting tube 18 and moving it to the valve replacement position, and then inserting the fitting connector 18 into the intake pipe 12 which receives the fitting connector 18 and cuts the tip portion thereof. Perform

The fitting connecting pipe 18 is transported to the water intake tower construction site manufactured in a state in which the flange portion 19 is integrally formed on the front surface of the main body 18a formed in the form of a circular pipe as shown in FIG. The inner diameter of the general water intake pipe 12 currently installed in the water intake tower 100 is 1,650 mm, and the outer diameter of the main body 18a of the fitting connecting pipe 18 to be inserted into the water intake pipe 12 is a water intake pipe ( It is made to 1,640mm smaller than the inner diameter of 12) to insert the main body 18a of the fitting connecting pipe 18 into the water intake pipe 12 is made smoothly.

When the main body 18a of the fitting pipe 18 is inserted into the intake pipe 12 in this manner, the flange portion 19, which is bent outward at a right angle, is formed at the distal end of the main body 18a formed in the shape of a cylindrical tube. 18a) is integrally formed with the flange 19 in front of the fitting tube 18 even if the front side cutting surface 12a of the water intake pipe 12 is cut at an angle. When the main body 18a and the water intake pipe 12 are joined by welding, the valve 14 can be easily installed at the correct position in the flange portion 19 later.

After inserting the fitting pipe 18 into the intake pipe 12 as described above, the outer diameter of the main body 18a is formed to be 10 mm smaller than the inner diameter of the intake pipe 12, so that the center line and the main body 18a of the intake pipe 12 are Step (108) to match the center line of the intake pipe (12) and the center line of the main body (18a) and to match the correct installation position of the fitting connector (18). ).

The operation of step H 108 is to specify the distance from the outer surface of the tower body 3 on which the water intake pipe 12 is installed to the front flange portion 19 of the fitting connecting pipe 18 fitted to the water intake pipe 12. Measure and fit with a ruler as defined in, and between the lower part of the main body 18a and the inner surface of the tip of the corresponding intake pipe 12 so that the center line of the intake pipe 12 and the center line of the main body 18a coincide with each other. A 5 mm thick metal piece is inserted to form a 5 mm gap between the outer circumferential surface of the main body 18a and the inner circumferential surface of the water intake pipe 12.

In this state, between the outer peripheral surface of the main body 18a on both sides of the metal piece and the inner peripheral surface of the intake pipe 12 by welding, the lower portion of the main body 18a of the connecting pipe 18 and the corresponding intake pipe 12 are connected. After the fixation is performed, the horizontal and vertical degrees of the fitting connector 18 are aligned with the gauge for measuring the horizontal and vertical degrees on the inner bottom surface of the main body 18a.

The operation of matching the horizontal and vertical degrees of the fitting connecting tube 18 is a short welding by welding between the outer peripheral surface of the main body (18a) and the inner peripheral surface of the water intake pipe 12 by the welding portion is attached and the other parts are in an uncoupled state Therefore, the fitting tube 18 is moved around the temporary contact portion in the pulling direction of the flange portion 19.

When the temporary contact portion is pulled downward while holding the upper portion of the central side of the flange portion 19 while the lower portion of the central portion of the flange portion 19 is inclined toward the center lower portion with the center portion of the flange portion 19 as the center. When the left side of the flange portion 19 is pulled in the right direction, the flange portion 19 is inclined in the right direction.

While looking at the gauge in this manner, as the flange portion 19 of the fitting connector 18 moves, the vertical and horizontal views of the fitting connector 18 in which the main body 18a is inserted into the intake tube 12 are inserted. The upper side, the left side, and the right side are briefly welded between the outer circumferential surface of the main body 18a and the inner circumferential surface of the water intake pipe 12 in this manner, and the verticality and horizontality of the fitting connecting tube 18 are adjusted between the temporary joints. .

After performing the step H (108) of the fitting while fitting exactly the installation position of the fitting connector 18 inserted into the intake pipe 12 as described above, the fitting connector 18 is completely fixed to the intake pipe 12 Perform step I 109 of combining.

In step I109 above, the part that was temporarily welded is the cut surface 12a, which is the front end of the water intake pipe 12, and the outer peripheral surface of the front side of the main body 18a of the fitting connecting pipe 18, which is the cut surface 12a. The weld joint of the outer side (front side) is shown as "19a" in FIG. 4 by joining the front circumference of the main body 18a by welding.

After the welding of the outer weld coupling portion 19a is performed as above, the worker enters the inside of the water intake pipe 12 or the main body 18a, and the outer periphery of the tip (rear side) of the main body 18a and the corresponding water intake pipe ( The inner circumferential surface of 12) was joined by welding, and this inner weld joint was indicated by "19b".

In this way, the fitting and connecting tube 18 can be firmly fixed by welding the double and outer portions of the main body 18a of the fitting connecting tube 18 inserted into the intake pipe 12.

After performing the operation of step I 109 as described above, as shown in FIG. 3, the new valve 14 is mounted on the flange portion 19 of the fitting pipe 18, and the strainer in front of the valve 14 The provided pipe tube 17 is installed in combination, and a valve support 15 and a pedestal 16 are installed below the valve 14 to collectively refer to the new valve 14 and related components. The J step 110 to install the valve device 10 to be carried out, in this case, the installation position of the valve device 10 using the second winch (20a) the valve component 31 shipped to the barge (30). You will be able to navigate to and execute the task easily.

For reference, the valve 14 turns out that the weight is a weight of up to 4 to 5 tons.

In the process of performing the operation of step J as described above, as shown in FIGS. 2 and 3, the valve shaft connecting rod 9 is installed upward on the upper side of the valve shaft 13 protruding upward from the valve 14. In addition, the valve shaft drive motor 8 is installed on the slab on the upper side of the tower body 3 in which the control chamber 6 is installed, and the drive shaft (not shown) and the valve shaft connecting table 9 are installed downward in the valve shaft drive motor 8. Of the valve unit 10 by stably coupling the upper end portions of the upper and lower ends thereof with the support members 7 installed on the outer circumferential surface of the top body 3 so that the valve shaft connecting member 9, which is long in the vertical direction, is supported. Complete the installation.

When the valve 14 is installed on the outside of the fitting connecting pipe 18 in the J step 110, the fitting connecting pipe 18 to the intake pipe 12 is projected to the outside from the outer wall surface of the tower at the correct position. Vertically and horizontally installed so that the valve 14 can also be installed accurately, and the gauge should be installed so that the valve shaft is exactly vertical.

When connecting between the valve shaft 13 and the drive shaft of the valve shaft drive motor 8 with the valve shaft connecting rod 9 long in the vertical direction as described above, the valve 14 is a fitting connecting pipe that is the main part of the present invention ( Since it is correctly installed on the flange portion 19 of 18), the drive shaft installed downward in the upper valve shaft drive motor 8, the valve shaft 13 of the valve 14, and the valve shaft connecting rod 9 are on the same vertical line. Being located in the driving force of the valve shaft drive motor 8 is smoothly transmitted from the drive shaft to the valve shaft connecting rod 9 and the valve shaft 13 to open and close the opening and closing valve in the valve 14 smoothly.

Start installation of the fitting connector 18 in step J 110 as described above to complete the installation of the valve 14 and the valve components 31 around the valve to complete the installation of the valve device 10. After completion, the first and second winch (20, 20a) and the cage 22 that was initially installed to perform the K step 111 to remove the water intake tower 100, the barge 30 is also moved from the water surface to the land After the separation is completed, all the work to replace the valve device 10 in the intake tower 100 is completed.

At any time in the above series of operations, the valve 14a, which has been conventionally installed, is always left open so that when the valve replacement work is completed later and the intake tower is operated normally, the newly installed valve 14 is opened and closed. Therefore, it is revealed that the water of the dam can be withdrawn or blocked into the intake well (2).

Next, this embodiment of the intake valve replacement method according to the present invention will be described with reference to FIG. 8, which is not the same as the embodiment A and 101 and the K step 111. Since the L stage 112 is added, detailed descriptions of the B stage 102 to the J stage 110 which are the same as the exemplary embodiment will be omitted.

In the step A (101) of the embodiment shown in Figure 7, the two winch (20, 20a), that is, the first winch 20 to raise and lower the cage 22, and the valve component (barge 30) 31) was supplied to the valve replacement position and a second winch 20a was installed to allow the cutout portion cut from the tip of the intake pipe to be loaded on the barge 30, but in step A101 of this embodiment, FIGS. 5 and 6 As shown in the chain winder hypothesis step of installing the chain winding machine 23 is further included.

The chain winder 23 instructs the insertion position of the fitting connecting pipe 18 to be inserted into the intake pipe 12 and the valve shaft 13 to be perpendicular to the valve 26 by hanging the weight 26a up to the valve replacement position. To this end, it is provided with a chain reel 24 on which a chain, a rope or a wire is wound on the support 25 to be installed in the top shin slab 3a so as to be rotated manually or electrically. The chain 26 is installed to be wound around the lower end of the weight 26a.

Then, the position indicated by the weight 26a hanging downwards on the support 25 of the chain winder 23 is aligned with the flange portion 19 and the valve shaft 13 of the fitting pipe 18. The chain guide 27 which adjusts the hanging position of the chain 26 is installed.

The chain guide 27 is fastened with a bolt after forming the long hole (28a) so that the upper horizontal portion of the frame 28 is bent in a "c" shape to move horizontally (arrow direction) to the support 25 In addition, the rollers 29 and 29a for guiding the chain 26 released from the chain winding machine 23 are installed at the vertical portion of the frame 28 and the tip portion of the lower stand 29b so as to be idle.

In this case, the frame 28 is not necessarily formed in a "c" shape, but may be inclined to form the lower stand 29b in which the lower roller 29a is installed.

The following is a description of the K step 111, in one embodiment, without installing or using the chain winding machine 23, the two winch (20, 20a) is installed and the lower chain ( 21, only the cage 22 was installed, so only the two winches 20, 20a and the cage 22 were removed. However, in this embodiment, the chain winding 23 is additionally installed. The removal process is further included.

In this embodiment, the L stage 112, which may be a main part, is performed after the G stage 107, which is cut at the front end portion as shown in FIG. 4 in the G stage 107. As shown in FIG. 5, the protruding position of the fitting connecting pipe 18 protruding outwardly of the intake pipe 12 after the fitting connecting pipe 18 is inserted into the drawn intake pipe 12 of the chain winding machine 23. It is indicated by the weight 26a suspended from the bottom.

The flange portion 19 of the fitting connecting tube 18 is installed at the lower end of the chain 26 released from the chain winding machine 23 in accordance with the distance that should be projected outward from the outer wall surface of the top body 3 as described above. As the weight 26a having a predetermined weight hangs downward, the protruding position of the flange portion 19 is adjusted to match the position indicated by the lower end of the weight 26a.

This is because the outer diameter of the main body 18a of the fitting connector 18 is formed to be 10 mm smaller than the inner diameter of the intake pipe 12, or the fitting connector 18 is inserted into the intake pipe 12, or On the contrary, it is possible to easily perform the fitting operation so that the lower end of the flange portion 19 and the weight 26a formed at the distal end of the fitting connection tube 18 coincide with the fitting connection tube 18 to the outside.

At this time, since the weight 26a is downwardly installed, the chain 26 has a metal chain, and thus has its own weight, so that the weight 26a is not shaken in the strong water generated in the process of moving the worker for work in the water of the dam 26a. Always points to a certain position.

The position where the weight 26a is hanged is the distance T between the valve shaft 13 and the flange portion 19 when the valve 14 is later installed on the flange portion 19 as shown in FIGS. 3 and 5. It is preferable to indicate the position entered into the inner side by), because the valve shaft connecting rod 9 and the valve shaft is installed on the upper side of the vertical line of the valve shaft 13 installed to protrude upward on the upper side of the valve 14 This is to ensure that the motor 8 and the valve shaft 13 exactly match the vertical line.

When the valve shaft 13 and the valve shaft connecting rod 9 and the valve shaft drive motor 8 are installed to coincide with each other on a vertical line as described above, the valve shaft drive motor 8 is driven to open and close the valve 14. In this case, the driving force of the valve shaft drive motor 8 is smoothly transmitted to the valve shaft 13 through the valve shaft connector 9 so that the motor shaft and the valve shaft connector 9 of the valve shaft drive motor 8 are conventionally used. This is because the situation in which the load is applied when the is tightly connected, can smoothly rotate the valve shaft 13 through the valve shaft connecting rod 9 without any occurrence.

Chain guide 27 is installed in connection with the chain winding machine 23 as shown in Figs. 5 and 6 the position of the weight (26a) is arranged in the lower side to indicate the position of the flange portion 19 as described above It can be adjusted by, which is because the distance that the top shin slab 3a protrudes outwards is different for each water intake tower 100, so if the chain 26 is straight down from the outer end of the top shin slab 3a, the weight 26a is The installation position of the valve 14, which is to be installed later, becomes inconsistent because the position to be instructed becomes irregular.

Therefore, in the present invention, the chain guide 27 is connected to the chain winding machine 23 so that the distance from which the top shin slab 3a protrudes to the outside of each intake tower 100 is constant from the outer wall surface of the top shin 3. In the state spaced outwards by the interval to indicate the position so that the fitting connector 18 is installed in the correct position.

That is, when the weight 26a is to be adjusted so as to indicate the position of the space required from the outer wall surface of the top body 3, as shown in Figure 6 in the horizontal portion above the frame 28 of the chain guide 27 When the fastened bolt is loosened, the frame 28 can be moved in the horizontal direction (arrow direction) as the bolt is inserted into the long hole 28a.

When the frame 28 protrudes outward in this way, the roller 29a provided at the front end of the lower base 29b of the frame 28 is separated from the outer wall surface of the top body 3, and conversely, the frame 28 ) Horizontally move the roller 29a provided at the distal end of the lower stand 29b and the outer wall surface of the top body 3 so that the distance between the roller 29a provided at the distal end of the lower stand 29b is increased. The gap with the outer wall surface of the tower body 3 will be able to be adjusted.

After adjusting the position of the frame 28 as described above and tighten the bolt fastened to the support 25 through the long hole 28a, the adjusted position of the chain guide 27 is fixed to the operation of the L step 112 It can be done.

In the description of this embodiment of the present invention, it has been described that the H step 108 is performed after the L step 112, but the order of the L step 112 and the H step 108 may be changed. .

In addition, when the valve 14 is installed in front of the fitting pipe 18 in the J step 110, the valve shaft 13 is directed in the vertical direction such that the valve shaft 13 is directed in the vertical direction by the weight 26a. 14) in which the weight 26a is adjusted to face the same vertical direction as the drive shaft of the valve shaft drive motor 8 by adjusting the position of the frame 28 of the chain guide 27. What is necessary is just to install the valve 14 so that the valve shaft 13 may match in a vertical direction.

In this case, the position adjustment of the chain guide 27 is further instructed by sliding the chain guide 27 in the direction of the arrow in FIG. 6 while releasing the bolt fastened to the support 25 through the long hole 28a. If the position is matched on the same vertical line as the drive shaft of the valve shaft drive motor 8, the position adjustment operation of the chain guide 27 is completed by tightening the loosened bolt.

1 Dam 2 Water Intake Well 3
4: intake hall 5: supply pipe 6: control room
7: Support 8: Valve Shaft Driving Motor 9: Valve Shaft Connecting Rod
10 valve device 11 cut portion 12 intake pipe
13 valve shaft 14 valve 15 valve support
16 pedestal 17: screen tube 18: fitting connector
19: flange 20: first winch 21: chain
22: cage 23: chain winding machine 24: chain winding
25: support 26: chain 27: chain guide
28 frame 29 roller 30 barge
31: valve component 100: intake tower 101: A stage
102: B stage 103: C stage 104: D stage
105: E stage 106: F stage 107: G stage
108: H stage 109: I stage 110: J stage
111: K stage 112: L stage

Claims (3)

A step of installing the first and second winches in the upper part of the intake tower,
A step B of installing a cage to be mounted by a worker on the lower end of the chain released from the first winch;
Step C, which floats a barge on the surface of the water tower,
A step D in which a worker rides down the cage to a valve replacement position, cuts the distal end portion of the old water intake pipe, and loads the cut portion to a barge by a second winch and transports it to the land;
E step of grinding the cutting surface of the water intake pipe cut the front end portion,
After loading the valve components necessary for valve replacement on the barge, moving the barge close to the intake tower and anchoring it;
A second step of the winch installed at the top of the intake tower, the G component of moving the fitting connection pipe made on land from the valve components shipped on the barge to the valve replacement position and inserting the intake pipe into the intake pipe;
H step of adjusting the fitting position of the fitting connector to be fitted to the intake pipe,
In step H, the fitting position is adjusted by welding in step H and the fitting pipe is welded to the intake pipe.
In step J, the valve is installed on the outer flange of the fitting pipe installed in step I, and the valve components are combined and installed in the corresponding positions.
Intake tower valve replacement method comprising the step of removing the cage and the first, second winch from the intake tower. The method of claim 1, wherein in the step A includes a chain winder installation process for installing a chain winder on the upper slab of the intake tower,
Step G is followed by step L, which specifies the fitting position of the fitting connector by hanging the weight installed at the lower part of the chain released from the chain winding machine downward.
Intake step valve replacement method characterized in that it comprises a step of removing the chain winding machine together with the cage and the first, second winch in step K. According to claim 2, The chain winding machine is provided with a chain guide for adjusting the distance between the chain and the outer wall surface of the chain released from the chain winding machine is installed in the lower end of the chain and the outer wall surface of the weight and the top shoe in step L Intake tower valve replacement method comprising the step of adjusting the interval of the.

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