JP4320836B2 - Temporary receiving device for piping installation - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a temporary installation device for piping installation used when piping is installed in a nuclear power plant or the like.
[0002]
[Prior art]
The nuclear power plant has a large number of various pipes outside the reactor pressure vessel. When these pipes are newly installed, they are installed in order from the bottom or by assembling unitized parts.
[0003]
On the other hand, in remodeling work, it is often impossible to install unitized parts due to space limitations, etc., so pipes are stacked from bottom to top based on existing position markings and existing pipe passing needles, etc. The fine alignment is performed by pulling the pipe with a chain block or the like.
[0004]
[Problems to be solved by the invention]
However, in the conventional remodeling method, the position can be adjusted only by pulling the pipe, so it is difficult to perform delicate positioning.In particular, the installation position of the pipe is set at the lower position where it is not directly connected to the existing existing pipe. If it is necessary to decide and temporarily restrain it, there is a problem that quantitative movement is difficult to grasp, and the experience of the operator is greatly affected, and the positioning mechanism and restraint mechanism are separate, so piping There is a problem that it takes a long time to position and temporarily constrain.
[0005]
Therefore, in order to be able to install the pipe from the top to the bottom by connecting the lower pipe to the pipe after the positioning of the pipe located above is easily performed and fixed, the present invention, It is an object of the present invention to provide a temporary installation device for piping installation that can accurately position an upper pipe and can temporarily restrain the pipe without preparing a separate restraining mechanism.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention mounts a table that can be adjusted only in the left-right direction or the front-rear direction on the base plate, and can adjust the movement only in the front-rear direction or the left-right direction on the table. It is possible to adjust the elevation of the face plate on which the swivel base is placed so that the swivel can be swung on the upper table and the pipe can be set on the top surface. Further, the above-described table, swivel base, and face plate are provided with a function of locking movement in each direction.
[0007]
Since the position of the pipe set on the face plate can be easily adjusted by moving each table, swivel base, face plate, etc. in each direction, the upper pipe can be accurately positioned. .
[0008]
In addition, the amount of movement in each direction can be quantitatively determined by providing a scale for reading the amount of movement in each direction of the table, swivel base, and face plate that adjusts the movement in the left and right or front and rear directions. You will be able to grasp.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 to FIG. 3 show an embodiment of the present invention. A base plate 1 is formed on a base plate 1 having a planar rectangular shape and side guides 4 extending in the left-right direction at both front and rear edges. A roller 3 attached to the lower surface is provided with a left / right adjustment table 2 provided with standing side guides 11 extending in the front / rear direction at both left and right edge portions as slightly shorter than the length in the left / right direction (arrow X direction). The left and right adjustment table 2 is placed so as to be movable in the left-right direction, and both front and rear direction end surfaces thereof are along the side guides 4 of the base plate 1, and are regulated by the side guides 4 of the base plate 1. Can be moved in the left-right direction, and the movement adjustment of the left-right adjustment table 2 is performed by the left-right direction movement adjustment mechanism 5.
[0011]
The left-right direction movement adjustment mechanism 5 includes two brackets 6a and 6b that are erected so as to be opposed to each other in the front-rear direction (arrow Y direction) center of both left and right ends of the base plate 1, and each bracket 6a. , 6b and screw shafts 7a, 7b that are opposed to the left and right end surfaces of the left / right adjustment table 2 by threading through and screwed to the inner side, and a base outside the screw shafts 7a, 7b. The left and right adjustment table 2 comprises operating handles 8a and 8b attached to the ends, and the left and right operating handles 8a and 8b are rotated in opposite directions to displace the left and right screw shafts 7a and 7b in opposite directions. Can be pushed and pulled (for example, about ± 100 mm).
[0012]
Further, on the left / right adjustment table 2, a front / rear adjustment table 9 having a length slightly shorter than the length in the front / rear direction of the left / right adjustment table 2 is provided in the front / rear direction via a roller 10 attached to the lower surface. Placed movably, the left and right end faces of the front / rear adjustment table 9 are aligned with the side guides 11 of the left / right adjustment table 2, and the front / rear adjustment table 9 is moved in the front / rear direction by being regulated by the side guides 11 Furthermore, the movement adjustment of the front / rear adjustment table 9 is performed by the front / rear direction movement adjustment mechanism 12.
[0013]
The front-rear direction movement adjustment mechanism 12 includes two brackets 13 erected in the vicinity of the center in the left-right direction at one end of the front-rear side of the left-right adjustment table 2, and a screw shaft 14 that is threaded through the brackets 13. A bearing 15 mounted on one end portion in the front-rear direction of the front-rear adjustment table 9 and rotatably supporting the inner end portion of each screw shaft 14; and a base end portion outside each screw shaft 14; The operation handle 16 is attached, and the operation handle 16 is rotated to displace the screw shaft 14 in the front-rear direction, whereby the front-rear adjustment table 9 can be pushed and pulled (for example, about ± 100 mm).
[0014]
Further, a swivel base 18 is installed at the center of the front / rear adjustment table 9 via a thrust bearing 17, and a rectangular support plate 19 is integrated with the swivel base 18 on the swivel base 18. And a turning movement adjusting mechanism 20 for turning the turntable 18 to displace the support plate 19 in the circumferential direction.
[0015]
The turning movement adjusting mechanism 20 has a pin 21 projecting downward on the lower surface of the outer peripheral edge of the turntable 18, and a distal end portion of a screw shaft 23 having an operation handle 22 at the proximal end portion of the pin 21. Are connected to each other through a rotary joint 24, and the screw shaft 23 is positioned in a substantially tangential direction with respect to the swivel base 18, and the intermediate portion thereof is installed on the front-rear adjustment table 9. The swivel base 18 is supported via the pin 21 by rotating the screw shaft 23 with the operation handle 22 and pushing the screw shaft 23 against the spherical bearing 25. For example, turning adjustment can be made about ± 5 °.
[0016]
On the other hand, a face plate 26 having the same size as the support plate 19 and a plurality of tube receiving jigs 29 of different sizes prepared as attachments is detachably attached to the upper surface portion. A center shaft 27 is attached to the center of the lower surface of the face plate 26, and the lower end of the center shaft 27 is connected to the support plate 19 and the swivel base. 18, the face plate 26 and the support plate 19 are equipped with an up / down movement adjustment mechanism 28 for adjusting the up / down movement of the face plate 26.
[0017]
The up-and-down movement adjusting mechanism 28 includes nuts 30 that are vertically installed at the four corners of the face plate 26 in the vertical direction (in the direction of the arrow Z), and screw the upper end side of each nut 30. A screw shaft 31 in which a screw-free portion of the lower end portion is rotatably supported by the support plate 19 and an output shaft 33 rotated by a rotating operation of the operation handle 32 are connected to the lower end of the screw shaft 31 via a flange joint 35. The connected worm wheel mechanism 34 and a support frame 36 suspended from the lower surface of the support plate 19 in order to fix the position of the worm wheel mechanism 34, and the screw shaft 31 is moved by operating the worm wheel mechanism 34. By rotating, the face plate 26 ascends in the vertical direction integrally with the nut 30 that is moved up and down along the screw shaft 31. Are you as to be allowed.
[0018]
Further, a scale 38 is provided at the right end position of the side guide 4 on either the front or rear side of the base plate 1 (front side in FIG. 2), and the rear end portion of the side guide 11 of the left / right adjustment table 2 is provided correspondingly. A pointer 37 is provided on the upper surface so that the horizontal movement amount of the left / right adjustment table 2 can be read, and one of the left and right side guides 11 (right side in FIG. 2) of the left / right adjustment table 2 is read. A scale 40 is provided at the center of the inner side surface, and a pointer 39 is provided at the center of the upper surface of the right end portion of the front / rear adjustment table 9 correspondingly to read the movement amount of the front / rear adjustment table 9 in the front / rear direction. In the support shaft 19 penetrating portion of the center shaft 27, the amount of elevation can be read using the upper surface of the support plate 19 as a guide. Le 41 is provided. On the other hand, a scale 42 is attached to the upper surface of the front / rear adjustment table 9 positioned below the pin 21 attached to the swivel base 18 so that the angle scale can be read using the lower end of the pin 21 as a pointer. .
[0019]
Furthermore, in the present invention, the functions of locking the left-right adjustment table 2 in the left-right direction, the front-rear adjustment table 9 in the front-rear direction, the turning of the face plate 26 and the up-and-down movement are provided. That is, the horizontal movement of the left / right adjustment table 2 is locked by pressing the left and right screw shafts 7 a, 7 b against the left / right adjustment table 2. For the longitudinal movement of the longitudinal adjustment table 9, a lock device 43 is mounted on the bearing 15 that supports the tip of the screw shaft 14. With respect to the pivot movement of the face plate 26, a bracket 44 is fixed on the upper surface of the front / rear adjustment table 9, and the tip of a bolt 45 screwed to the bracket 44 is pressed against the outer peripheral surface of the upper ring portion of the thrust bearing 17. It is supposed to be locked. Regarding the up-and-down movement of the face plate 26, a lock device 46 is attached to the shaft portion of the operation handle 32 of the worm wheel mechanism 34.
[0020]
In FIG. 1, reference numeral 47 denotes an upper pipe to be installed.
[0021]
When remodeling a nuclear power plant, when installing pipes, position and fix the new upper pipe 47 with high accuracy, and then connect the lower pipe to the upper pipe 47 to move the pipe from top to bottom. Try to install it.
[0022]
More specifically, first, the temporary installation device for pipe installation according to the present invention is disposed below the position where the new pipe 47 is to be positioned and fixed, if necessary, via an auxiliary stand or the like. At this time, a tube receiving jig 29 matching the outer diameter of the pipe 47 to be positioned is set on the upper surface of the face plate 26, and the pipe 47 is dropped and placed in the pipe receiving jig 29. To.
[0023]
In the above state, the piping 47 is positioned. In this case, the new pipe 47 is positioned by adjusting the position by making full use of the left-right direction movement adjustment mechanism 5, the front-rear direction movement adjustment mechanism 12, the turning movement adjustment mechanism 20, the up-and-down movement adjustment mechanism 28, and the like. To do.
[0024]
When adjusting the position of the pipe 47 in the left-right direction by the left-right direction movement adjusting mechanism 5, the left and right screw shafts 7a, 7b are pushed and pulled in the left-right direction by rotating the left and right operation handles 8a, 8b. However, in FIG. 1, when the pipe 47 is moved to the left, for example, the operation handle 8a is rotated so as to pull back the left screw shaft 7a, while the operation handle 8b is rotated so as to push in the right screw shaft 7b. I will let you. Accordingly, the left / right adjustment table 2 is moved to the left on the base plate 1 by the movement of the roller 3 and the movement restricted by the side guide 4, so that the movement is supported by the front / rear adjustment table 9, the swivel base 18, and the support. This is transmitted to the pipe 47 through the plate 19, the lifting / lowering adjustment mechanism 28, and the face plate 26. At this time, the amount of leftward movement can be quantitatively grasped by reading the scale of the scale 38 on the inner side surface of the side guide 4 with the pointer 37 on the rear end portion of the side guide 11.
[0025]
When the position of the pipe 47 is adjusted in the front-rear direction by the front-rear direction movement adjustment mechanism 12, the screw shaft 14 is pushed and pulled in the front-rear direction by rotating the operation handle 16. As a result, the front / rear adjustment table 9 is moved in the front / rear direction on the left / right adjustment table 2 by the rolling of the roller 10 and the movement restricted by the side guides 11, so that the pipe 47 is also moved in the front / rear direction. At this time, the amount of movement in the front-rear direction can be quantitatively grasped by reading the scale 40 on the inner side surface of the side guide 11 with the pointer 39 on the front-rear adjustment table 9.
[0026]
When the turning of the pipe 47 is adjusted by the turning movement adjustment mechanism 20, the screw shaft 23 is pushed and pulled in the horizontal direction by rotating the operation handle 22. In this case, when the screw shaft 23 is pushed and pulled, the displacement can be transmitted to the pin 21 fixed to the outer peripheral end portion of the swivel base 18, so that the swivel base 18 is swung via the pin 21. The piping 47 can be swiveled in the horizontal direction. Further, the turning angle at this time can be quantitatively grasped by reading the angle scale of the scale 42 on the front-rear adjustment table 9 with the lower end of the pin 21 as a pointer.
[0027]
When the pipe 47 is adjusted in the vertical direction by the up-and-down movement adjusting mechanism 28, the screw shaft 31 connected to the output shaft 33 is rotated by rotating the operation handle 32 of each worm wheel mechanism 34. In this case, since the upper end side of the screw shaft 31 is screwed into a nut 30 that is fixed to the face plate 26, the face plate 26 is moved up and down with the rotation of the screw shaft 31. The position of is adjusted. Further, at this time, the amount of elevation can be grasped by reading the scale of the scale 41 of the center shaft 27 using the upper surface of the support plate 19 as a pointer. Since the worm wheel mechanism 34 is installed corresponding to the four corners of the face plate 26, the horizontal position of the face plate 26 is delicately adjusted by individually operating the operation handles 32 of the worm wheel mechanisms 34. Can be adjusted.
[0028]
As described above, when the position in each direction of the pipe 47 is adjusted, the position in each direction is locked to temporarily restrain the pipe 47. In this case, the right and left screw shafts 7 a and 7 b that are in contact with the left and right end surfaces of the left and right adjustment table 2 are simultaneously pressed to lock the left and right position of the left and right adjustment table 2, and The front and rear position of the front / rear adjustment table 9 is locked by the mounted locking device 43, and the bolt 45 of the bracket 44 part standing on the front / rear adjustment table 9 is tightened to tighten the outer periphery of the upper ring portion of the thrust bearing 17. The turning position of the turntable 18 is locked by pressing against the surface, and the vertical position of the face plate 26 is locked by the lock device 46 attached to the handle shaft portion of each worm wheel mechanism 34.
[0029]
When the piping 47 is positioned and temporarily restrained as described above, the piping 47 is fixed. After the piping 47 is fixed, the piping installation provisional receiving device of the present invention is removed, and the lower piping is added to the lower end of the piping 47 so that the piping is installed from top to bottom.
[0030]
In the above-described embodiment, a case has been described in which a plurality of screw shafts are provided in each part for rotation adjustment in each direction excluding turning, and each is operated to rotate individually with an operation handle. A sprocket is provided at the base end of the shaft, and a chain is hung between the sprockets so that a plurality of screw shafts can be interlocked by operating one operation handle. A pair of screw shafts 7a, 7b on the left and right sides, or a single screw shaft 14 for the forward / backward movement adjustment mechanism 12, and the arrangement of the left / right adjustment table 2 and the front / rear adjustment table 9 are upside down. Furthermore, the locking method by the movement adjusting mechanism in each direction can be arbitrarily selected, and the arrangement position of the scale for reading the movement amount in each direction is not shown. In the embodiment, the installation of the piping of the nuclear power plant has been shown, but it can be similarly adopted in other plants and the like, and within the scope not departing from the gist of the present invention. Of course, various changes can be made.
[0031]
【The invention's effect】
As described above, according to the temporary installation device for piping installation of the present invention, a table that can be moved and adjusted only in the left-right direction or the front-rear direction is placed on the base plate, and the front-rear direction or the left-right direction is placed on the table. A face on which a table that can be moved and adjusted only in the direction is placed, and a swivel base is placed on the upper table so that swivel adjustment is possible, and a pipe can be set on the top surface of the swivel base. The plate is assembled so that it can be adjusted up and down, and the function of locking the movement of each table, swivel base, and face plate in each direction is provided. Positioning in each direction such as direction, front-rear direction, and up-down direction can be performed easily and accurately, and the position of the pipe can be restrained without preparing a separate restraining mechanism. In addition, the piping can be installed from top to bottom, and a scale for reading the amount of movement in each direction of the table, swivel, and face plate that adjusts movement in the left-right direction or the front-rear direction is provided at each required position. By adopting a configuration, it is possible to quantitatively grasp the amount of movement when positioning the pipe, and this makes it possible to work without requiring skill, so that workability can be improved. Excellent effects such as being able to.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment of a temporary installation device for pipe installation according to the present invention.
FIG. 2 is a view taken in the direction of arrows AA in FIG.
FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base plate 2 Left / right adjustment table 5 Left / right direction movement adjustment mechanism 9 Front / rear direction adjustment table 12 Front / rear direction movement adjustment mechanism 18 Swivel table 20 Rotation movement adjustment mechanism 26 Face plate 28 Elevation movement adjustment mechanism 38, 40, 41, 42 Scale

Claims (2)

A table that can be moved and adjusted only in the left-right direction and the front-rear direction is placed on the base plate, and a table that is movable and adjustable only in the front-rear direction and the left-right direction is placed on the table, and the upper position is set. A swivel base is placed on the table so that the swivel can be adjusted, and a face plate on which the pipe can be set on the upper surface is assembled on the swivel base so as to be adjusted up and down. A temporary installation device for pipe installation, characterized by having a function of locking movement of each face plate in each direction. The provisional receiving device for pipe installation according to claim 1, wherein scales for reading movement amounts of the table, the swivel base, and the face plate in the left-right direction or the front-rear direction are provided at required positions.

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