JP2019090465A - Method for constructing vertical pipeline - Google Patents

Abstract

To enable efficient clearance adjustment work, upon sequentially connecting a plurality of vertical pipe members to construct a vertical pipeline.SOLUTION: A method for substantially connecting a plurality of vertical pipe members to construct a vertical pipeline, is characterized in repeatedly steps of: mounting a position adjustment jig 2 at an upper end part of a vertical pipe member fixed to a building in advance; using the position adjustment jig 2 to adjust a position of a lower end part of a next vertical pipe member to an upper end part of the vertical pipe member fixed to the building in advance; and welding and connecting the upper end part of the vertical pipe member fixed to the building in advance and the lower end part of the next vertical pipe member. With the position adjustment jig 2, an interval between end parts of vertical pipe members is adjusted, which in turn can perform interval adjustment work efficiently, shorten a work time and reduce man-hours.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method of constructing a gutter pipe of a building.

  When installing piping for various building equipment such as air conditioning equipment and sanitation equipment in a building such as a high-rise building, the plurality of divided steel pipe members are lifted sequentially in the vertical state, and they are used as a frame or fixing member The construction method (riser unit construction method) which carries out unitization, etc. is carried out and construction of a piping is adopted conventionally (for example, refer to patent documents 1-3).

  A hanging piece is attached to the upper end of the bushing member used for construction, a chain block is attached to them, and the bushing member is lifted and lifted in a vertical posture. Then, the ends of the upper and lower bushing members are butted and connected by welding, and the piping is constructed in the building.

Patent No. 3688837 Patent No. 4750326 Patent No. 5300311

  Here, it is desirable to manage the gap between the end parts of the connecting tube members with the desired accuracy with regard to the piping for supplying heat medium such as cold water or hot water of district cooling and heating (DHC). . With regard to the piping of regional cooling and heating, strict clearance control is required, such as that it can be confirmed that a uniform weld bead is also formed on the inner surface of the pipe, in an X-ray inspection based on JIS standards performed after welding. Desired. In the past, in order to manage such a gap, a gap of about 100 mm was once provided between the end portions of the bushing members, and the gap adjustment was performed while suspending the upper bushing member with a chain block from there. . Furthermore, after adjusting the clearance, welding was performed by welding a gold horse and temporarily fixing the end portions of the bushing members.

  However, in the clearance adjustment performed while being suspended by the chain block, the operation takes time, and a considerable number of workers are required.

  This invention is made in view of this point, and when connecting a plurality of bushings sequentially and constructing a piping, it aims at enabling clearance adjustment work to be efficient.

  According to the present invention, in order to achieve the above object, according to the present invention, there is provided a method of constructing a piping by sequentially connecting a plurality of bushings in a building, comprising the upper end of the bushings previously fixed to the building. Attach a position adjustment jig to the part, and use the position adjustment jig to adjust the position of the lower end of the next bushing with respect to the upper end of the bushing previously fixed to the building. A method for constructing a gutter piping is provided, including repeatedly performing a step of welding and connecting the upper end of the gutter member fixed to the building and the lower end of the next gutter member.

  In this construction method, after the lower end portion of the next bushing member is positionally adjusted with respect to the upper end portion of the bushing member previously fixed to the building, the next bushing member is temporarily fixed to the building, and first The upper end portion of the bushing member fixed to the building and the lower end portion of the next bushing member may be welded. In addition, a plurality of position adjustment jigs are attached to the upper end portion of the bushing member fixed to the building in advance to adjust the position, and the upper end portion of the bushing member fixed to the building first and the next tapping member While continuously welding the lower end portion in the circumferential direction, the position adjustment jig at the front position of welding may be sequentially removed. In addition, the bushing member may be connected to both the upper end portion and the lower end portion of the bushing member previously fixed to the building.

  According to the present invention, the gap adjustment operation can be efficiently performed by adjusting the gap between the end portions of the bushing members using the position adjustment jig, the operation time is shortened, and the number of workers is also reduced. become able to. Further, by fixing and welding with the position adjustment jig, it is not necessary to perform temporary fixing using a gold horse, and strength reduction due to heat input can also be avoided.

  When welding the position adjustment jig at the forward position of welding while sequentially welding the upper end of the flange member previously fixed to the building and the lower end of the next flange member, when welding The position adjustment jig does not disturb the space between the position adjustment jig and the circumferential surface of the tube can be narrowed. Thereby, the inside diameter of the opening formed in the steel frame, floor slab or the like on which the gutter piping is formed can be reduced, and the work for closing the opening can be easily performed.

It is explanatory drawing of a cocoon tube member. They are a front view (a) and a side view (b) of a position adjustment jig. It is explanatory drawing of the state which installed the collar pipe member used as a foundation in a building. It is explanatory drawing of the state which moves the following bushing member above the bushing member used as a foundation. It is explanatory drawing of the state which adjusts the clearance gap between the upper end part of the bushing pipe member used as a foundation, and the lower end part of the following bushing pipe member. It is explanatory drawing of the state which welds the upper end part of the base tube member used as a foundation, and the lower end part of the following tube member, (a) shows the state at the time of a welding start, (b) is in the front position of welding. A state in which only one position adjustment jig 2 is removed is shown, (c) shows a state in which welding is performed to a position beyond the removed position adjustment jig, (d) shows welding again from the welding start position and target position It shows a state where welding is started up to the welding start position, and (e) shows a state at the end of welding where the remaining parts are finally welded. It is explanatory drawing of the state which welds the upper end part of the base tube member used as a foundation, and the lower end part of the following tube member, (a) shows the state at the time of a welding start, (b) is in the front position of welding. The state in which only one position adjustment jig 2 is removed is shown, (c) shows the state in which one more position adjustment jig 2 in the welding front position is removed, and (d) shows the state at the end of welding. ing. It is explanatory drawing of the state which moves the following cannula further to the upper side of the following cannula.

  Hereinafter, a method of installing a gutter pipe according to an embodiment of the present invention will be described with reference to the drawings. In the present specification and the drawings, components having substantially the same functional configuration will be assigned the same reference numerals and redundant description will be omitted.

  As shown in FIG. 1, the tubular member 1 has a plate-like mounting piece 11 attached to the side surface of the upper end portion of the hollow cylindrical tube member 10 open at both ends, similarly, the plate on the side surface of the lower end portion of the tube member 10 In the form of a ring-shaped mounting piece 12. These mounting pieces 11 and 12 are provided with projections for preventing overturning. In this embodiment, at the upper end of the bushing member 1, a plurality of, for example, four mounting pieces 11 are attached to the side surfaces at equal angular intervals of 90 °, similarly, at the lower end of the bushing member 1. Also, a plurality, for example four mounting pieces 12, are mounted on the sides at equal angular intervals of 90 °. For the pipe material 10, for example, carbon steel pipe for pressure piping such as STPG 370, carbon steel pipe for piping such as black gas pipe, or the like is used. In addition, the kind of pipe material 10 is not specified.

  As shown in FIGS. 2A and 2B, the position adjustment jig 2 includes an upper connection case 21 above the pressing portion 20 disposed at the center, and a lower connection case 22 below the pressing portion 20. Have. Fixing screws 23 a and 23 b for fixing to the attachment piece 12 at the lower end portion of the bushing member 1 are attached to the upper connection case 21. Similarly, a fixing screw 24 for fixing the lower connecting case 22 to the mounting piece 11 at the upper end of the bushing member 1 is attached.

  The pressing portion 20 is provided with a pair of upper link arms 31 and lower link arms 32 connected by a shaft 30. The upper link arm 31 and the lower link arm 32 have their proximal end portions pivotally connected to each other by the shaft 30, and the upper link arm 31 and the lower link arm 32 can freely change the angle θ of each other. .

  The distal end portion of the upper link arm 31 is connected to the upper connection case 21 via the shaft 33, and the distal end portion of the lower link arm 32 is connected to the lower connection case 22 via the shaft 34. The tip end of the push-in bolt 35 mounted on the pressing portion 20 is in contact with the proximal end portions of the upper link arm 31 and the lower link arm 32. When the push bolt 35 is rotated and operated in a direction to push the inside of the pressing portion 20, the base end portions of the upper link arm 31 and the lower link arm 32 are pushed in, whereby the upper link arm 31 and the lower link arm The 32 angles θ are broadened. As a result, the upper connection case 21 and the lower connection case 22 are moved apart from each other. On the other hand, when the push bolt 35 is rotated and operated in the direction of being pulled out from the pressing portion 20, the base end portions of the upper link arm 31 and the lower link arm 32 are pushed outward, thereby the upper link arm 31 and the lower link arm The angle θ of 32 is narrowed. As a result, the upper connection case 21 and the lower connection case 22 are moved closer to each other.

  Next, a construction method according to the embodiment of the present invention will be described in which a plurality of bushings 1 (1a, 1b, 1c,...) Are sequentially connected to construct a piping in a building. In addition, as an example, the gap piping between the end parts of the flange members 1 (1a, 1b, 1c,...) Is managed with desired accuracy and welding is performed to supply the heat medium of the regional cooling and heating. Shows the form of construction.

  First, as shown in FIG. 3, the base tube member 1a is fixed to, for example, the steel frame 3 of a building. In this case, the bushing member 1 a can be fixed to the steel frame 3 via an appropriate bracket 4 or the like. The base tube member 1a is fixed to, for example, the steel frame 3 of the first floor portion of the building. The bracket 4 functions as a steadying of the bushing member 1a. The bracket 4 is attached to the bushing member 1a after the bushing member 1a is inserted by a tower crane or the like. After the bracket 4 is attached, the tower crane or the like that holds the bushing member 1a is separated from the bushing member 1a, and the tower crane or the like is released.

  Next, as shown in FIG. 4, the next collar member 1b is moved above the collar member 1a previously fixed to the steel frame 3 of the first floor portion of the building. In the state where the position adjustment jig 2 is attached to the attachment piece 11 at the upper end portion of the bushing member 1a previously fixed to the steel frame 3, the following bushing member 1b can be moved. In this case, as shown in FIG. 4, until the movement of the next bushing member 1 b is completed, the position adjustment jig mounted on the attachment piece 11 at the upper end of the bushing member 1 a fixed to the steel frame 3 earlier. By setting the tool 2 in such a posture as to spread upward, the lower end portion of the subsequent bushing member 1 b can be smoothly brought close to the upper end of the bushing member 1 a previously fixed to the steel frame 3.

  The lower end portion of the next flange member 1b is brought close to the upper end portion of the flange member 1a previously fixed to the steel frame 3, and then the upper end of the flange member 1a previously fixed to the steel frame 3 as shown in FIG. The position adjustment jig 2 is mounted between the lower part and the lower end portion of the next bushing member 1b. In this case, the lower connection case 22 of the position adjustment jig 2 is fixed to the mounting piece 11 at the upper end of the flange member 1a previously fixed to the steel frame 3 by the fixing screw 24. Further, the upper connecting case 21 of the position adjusting jig 2 is fixed to the mounting piece 12 at the lower end portion of the subsequent sleeve member 1b by the fixing screws 23a and 23b. A plurality of, for example, four mounting pieces 11 are attached to the side surfaces at equal angular intervals of 90 ° at the upper end portion of the flange member 1a previously fixed to the steel frame 3, similarly, the next flange member A plurality of, for example, four attachment pieces 12 are attached to the side surface at an equal angular interval of 90 ° also at the lower end portion of 1b. The position adjustment jig 2 is attached to each of the plurality of, for example, four attachment pieces 11 attachment pieces 12.

  When the upper connection case 21 of the position adjustment jig 2 is fixed to the mounting piece 12 at the lower end of the subsequent flange member 1b, the fixing screw 23a attached to the upper portion of the upper connection case 21 is for fall prevention The two fixing screws 23b attached to both sides of the upper connection case 21 function as groove adjustment.

  The angle θ of the upper link arm 31 and the lower link arm 32 is changed by rotating and operating the push-in bolt 35 in each of the plurality of, for example, four position adjustment jigs 2, and the upper connection The distance between the case 21 and the lower connection case 22 is adjusted respectively. In addition, by appropriately pressing the two fixing screws 23b mounted on both sides of the upper connection case 21 in the thickness direction of the mounting piece 12 from both sides, the lower end portion of the next bushing member 1b is perpendicular to the axial direction Can be moved to Further, since a plurality of, for example, four position adjustment jigs 2 are arranged at equal angular intervals of 90 ° on the side surfaces of the cannula members 1a and 1b, the push-in bolts 35 of each position adjustment jig 2 and By appropriately operating the fixing screw 23b, adjusting the gap between the upper end portion of the flange member 1a previously fixed to the steel frame 3 at each position and the lower end portion of the next flange member 1b (groove adjustment) The gap can be managed with desired accuracy over the entire circumference. In this way, the gap between the upper end of the bushing member 1a previously fixed to the steel frame 3 and the lower end of the subsequent bushing member 1b can be accurately corrected, and both of the grooves can be made to coincide with each other accurately.

  And after the position adjustment (groove adjustment) between the upper end portion of the flange member 1a previously fixed to the steel frame 3 and the lower end portion of the next flange member 1b is performed in this way, the gap is welded by arc welding etc. Welding, and the sleeve member 1a fixed to the steel frame 3 first and the next sleeve member 1b are integrally connected. In addition, after position adjustment with the upper end part of the collar member 1a fixed to the steel frame 3 previously and the lower end part of the following collar member 1b was performed, as shown in FIG. The flange member 1b may be temporarily fixed to the steel frame 3 of the building via a suitable bracket 4 or the like. As described above, if welding is performed after temporarily fixing the next flange member 1b to the building, the next flange member 1b becomes stable, and the welding operation becomes easy. Also in this case, the bracket 4 functions as a sway for the next bushing member 1b. The bracket 4 is attached to the next bushing member 1b after the following bushing member 1b is introduced by a tower crane or the like. After the bracket 4 is attached, the tower crane or the like that holds the next flange member 1b is separated from the next flange member 1b, and the tower crane or the like is released.

  Further, when welding the upper end portion of the flange member 1a previously fixed to the steel frame 3 to the lower end portion of the next flange member 1b, a plurality of, for example, four position adjustments are made at the start of welding. The jigs 2 are attached to the side surfaces at equal angular intervals of 90 °. For this reason, as shown in FIG. 6A, on the side surfaces of the sleeve member 1a and the sleeve member 1b, any position adjustment jig 2 is not attached so that the position adjustment jig 2 does not become an obstacle. Welding will be started from position P1.

  And as shown in FIG.6 (b), welding is continuously continued to the circumferential direction of the flange member 1a and the flange member 1b from arbitrary positions P1, and the upper end of the flange member 1a fixed to the steel frame 3 previously. The gap between the lower part and the lower end of the next flange member 1b is continuously filled with the weld metal.

  Then, welding is advanced, and as shown in FIG. 6 (b), when it comes to a position P2 in the vicinity of the position where the position adjustment jig 2 is attached, the position adjustment jig 2 becomes an obstacle as it is I will. Therefore, only one position adjustment jig 2 at the front position of welding is removed first, and welding is performed to a position P3 beyond the removed position adjustment jig 2 (FIG. 6 (c)).

  Next, as shown in FIG. 6 (d), welding is started again from the position P1 which is the welding start position and the position P4 which is the target position, and in the same manner, the position adjusting jig 2 located in the welding front position is While removing one by one, weld continuously to position P1. Finally, as shown in FIG. 6E, welding is performed from the position P3 which is the remaining portion to the position P4. Also in this case, the welding is advanced while removing the position adjustment jig 2 at the welding forward position.

  Thus, it becomes possible to integrally weld and connect the flange member 1a previously fixed to the steel frame 3 and the subsequent flange member 1b over the entire circumference. In this way, the back side is continuously welded over the entire circumference while keeping the gap between the upper end of the flange member 1a previously fixed to the steel frame 3 and the lower end of the next flange member 1b constant. Can form a uniform weld bead. 6 (a) to 6 (e) show an example in which welding is continuously performed in the counterclockwise direction along the side surface of the flange member 1a and the flange member 1b from an arbitrary position P1. The welding direction may be clockwise.

  Moreover, another welding procedure is shown to Fig.7 (a)-(d). Similarly, at the start of welding, a plurality of, for example, four position adjustment jigs 2 are attached to the side surfaces at equal angular intervals of 90 °. Therefore, as shown in FIG. 7A, on the side surfaces of the sleeve member 1a and the sleeve member 1b, any position adjustment jig 2 is not attached so that the position adjustment jig 2 does not interfere Welding is started from position P1.

  And as shown in FIG.7 (b), welding is continuously continued to the circumferential direction of the flange member 1a and the flange member 1b from arbitrary positions P1, and the upper end of the flange member 1a fixed to the steel frame 3 previously. The gap between the lower part and the lower end of the next flange member 1b is continuously filled with the weld metal.

  Then, welding is advanced, and as shown in FIG. 7B, when it comes to a position P2 near the position where the position adjustment jig 2 is attached, the position adjustment jig 2 becomes an obstacle as it is I will. Therefore, only one position adjustment jig 2 at the front position of welding is removed first, and welding is further advanced. Then, as shown in FIG. 7C, when the position adjustment jig 2 is at the position P3 in the vicinity of the position where the next position adjustment jig 2 is attached, one more position adjustment jig 2 at the welding front position is Remove and proceed with welding. Thus, while removing the position adjustment jigs 2 at the front position of welding one by one, the upper end portion of the bushing member 1a fixed to the steel frame 3 first and the lower end portion of the next bushing member 1b in the circumferential direction It welds continuously and, as shown in FIG.7 (d), finally, the collar member 1a fixed to the steel frame 3 previously and the collar member 1b of the following are integrally welded over the perimeter. Connection is possible. In this way, the back side is continuously welded over the entire circumference while keeping the gap between the upper end of the flange member 1a previously fixed to the steel frame 3 and the lower end of the next flange member 1b constant. Can form a uniform weld bead. 7 (a) to 7 (d) show an example in which welding is continuously performed in the counterclockwise direction along the side surfaces of the flange member 1a and the flange member 1b from an arbitrary position P1. The welding direction may be clockwise.

  Thus, after the connection between the flange member 1a previously fixed to the steel frame 3 and the next flange member 1b is finished, next, as shown in FIG. Next, the next sleeve member 1c is moved above the sleeve member 1b. Then, similarly, using the position adjustment jig 2, the positions of the upper end portion of the next sleeve pipe member 1 b and the lower end portion of the next sleeve pipe member 1 c are adjusted, and the next upper side of the next sleeve pipe member 1 b Connect the tube member 1c. Then, by repeating the same process thereafter, a plurality of bushings 1 (1a, 1b, 1c,...) Can be sequentially connected in a building to construct a piping.

  As described above, according to the construction method of the heat pipe according to the embodiment of the present invention, the heat pipe member 1 is adjusted by adjusting the gap between the end portions of the heat pipe members 1 using the position adjusting jig 2. Since the loading and clearance adjustment can be performed simultaneously and the working efficiency is improved, the working time can be shortened and the number of workers can be reduced. Further, by fixing and welding with the position adjustment jig 2, it is not necessary to perform temporary fixing using a gold horse, and strength reduction due to heat input can also be avoided. In addition, the opening which penetrates a weir piping is provided in the horizontal division (slab, steel frame 3 grade | etc.,) And the weir division. The openings provided in the horizontal section are sealed with glass wool or the like after the gutter piping is attached, and the fire spread to the upper and lower floors can be prevented.

  When welding the upper end of the bushing member 1a previously fixed to the steel frame 3 with the position adjustment jig 2 to the lower end of the next bushing member 1b, the attachment piece 12 of the position adjustment jig 2 and If a sufficient space is not provided between the tube 10 and the circumferential surface of the tube 10, it is difficult to insert a welding rod for welding into the beveled portion. However, as described above with reference to FIG. 6, the upper end portion of the flange member 1a fixed first to the steel frame 3 and the next flange while removing the position adjusting jig 2 at the front position of welding one by one sequentially Since the lower end portion of the member 1b is continuously welded in the circumferential direction, the position adjusting jig 2 does not interfere with welding, and the mounting piece 12 of the position adjusting jig 2 and the circumferential surface of the pipe 10 The space between can be narrowed. Thereby, the size of the mounting piece 12 can be reduced, and for example, the width can be about 75 mm. If the width can be shortened, the inner diameter of the opening of the horizontal section (slab, steel frame 3 or the like) can be accommodated to about the diameter of the tube 10 + 200 mm. Then, the difference between the outer diameter of the tube 10 and the inner diameter of the opening of the through section of the horizontal section (slab, steel frame 3 or the like) or the hole section can be about 100 mm. Since the difference in diameter between the two is small, when an opening for passing the pipe material 10 is provided in the horizontal section, the work for closing the opening can be easily performed.

  As mentioned above, although the embodiment of the present invention was illustrated and explained, the present invention is not limited to the illustrated embodiment. For example, in the illustrated embodiment, an example is shown in which a plurality of cannula members 1 (1a, 1b, 1c,...) Are sequentially connected upward, but as shown in FIG. The sleeve member 1 'can also be connected below the fixed sleeve member 1a. As described above, the bushing member can be connected to both the upper end portion and the lower end portion of the bushing member 1a previously fixed to the building. In this case, for example, the lower end of the next bushing member 1b is connected to the upper end portion of the bushing member 1a previously fixed to the building by adjusting the clearance using the position adjustment jig 2; Attach the chain block to the lower end of the bushing 1a fixed to the building, as in the conventional case, and lift, lift and weld the bushing 1 'in the vertical position. May be connected.

  The number of attachment pieces 11 and 12 provided on the bushing member 1 is arbitrary and is not limited to four as exemplified in the embodiment.

  As the position adjustment jig 2, for example, "ATOMU-701" manufactured by Toyama Sangyo Co., Ltd. and Minato Kikai Kogyo Co., Ltd. and "inclination adjustment device" disclosed in Japanese Patent No. 3487812 are exemplified. . In addition, these are illustrations and are not limited. Although these are generally used for construction of structures such as building materials, in the present invention, they are used not for the structures but for adjusting the gap between the ends of the tube members constituting the piping. It is characterized by In addition, it is also possible to use another mechanism capable of adjusting the gap between the end portions of the bushing members. Moreover, although the form which installs the weir piping which supplies the heat medium of a regional cooling and heating as an example was shown, this invention is applicable also to construction of other air conditioning piping.

  The present invention is useful for the construction of a gutter piping of a building.

Reference Signs List 1 flange member 3 steel frame 4 bracket 10 tube 11, 12 piece 20 pressing portion 12 upper connection case 22 lower connection case 23, 24 fixing screw 30, 33, 34 shaft 31 upper link arm 32 lower link arm 35 push-in bolt

Claims (5)

It is a method of constructing a gutter piping by sequentially connecting a plurality of gutter members in a building,
A position adjustment jig is attached to the upper end of the collar member previously fixed to the building, and the lower end of the next collar member is previously fixed to the building using the position adjustment jig. The position is adjusted with respect to the upper end portion of the member, and the step of welding and connecting the upper end portion of the bushing member fixed to the building first and the lower end portion of the next bushing member is repeated. Piping method.   After adjusting the lower end of the next tube member to the upper end of the tube member fixed to the building first, the next tube member was temporarily fixed to the building, and it was fixed to the building first The method according to claim 1, wherein the upper end portion of the bushing member and the lower end portion of the subsequent bushing member are welded.   A plurality of position adjustment jigs are attached to the upper end portion of the bushing member fixed to the building in advance to adjust the position, and the upper end portion of the bushing member fixed to the building first and the lower end portion of the next bushing member 3. The method according to claim 1, further comprising: sequentially removing a position adjustment jig at a position in front of the welding while welding.   The construction method of the gutter piping according to any one of claims 1 to 3, characterized in that the gutter member is connected to both the upper end portion and the lower end portion of the gutter member previously fixed to the building.   The construction method of the gutter piping according to any one of claims 1 to 4, wherein the gutter piping is a gutter piping which supplies a heat medium for regional cooling and heating.

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