JP2011073029A - Connecting tool for welding piping - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain improvement of execution efficiency by facilitating centering operation and setting operation of root opening. <P>SOLUTION: A connecting tool 1 is disclosed comprising a top holder 11 that can be attached to and detached from the lower periphery of an upper first vertical piping 3A, a bottom holder 12 that can be attached to and detached from the upper periphery of an lower second vertical piping 3B, a guide plate 13 that is installed in the top holder 11 and that guides the second vertical piping 3B coaxially relative to the first vertical piping 3A, and a screw shaft 14 that connects the top holder 11 and the bottom holder 12. The screw shaft 14 is configured to be installed in a manner that one end 14a in the screw shaft direction can rotate on the top holder 11 around a direction orthogonally crossing the axial direction of the first vertical piping 3A, in a manner that the other end 14b is held on the bottom holder 12 so that the screw shaft direction and the axial line direction of the second vertical piping coincide with each other, and in a manner that the bottom holder 12 is made to move along the screw shaft direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a connecting jig for pipe welding that can perform welding of a gutter pipe provided in a building with high accuracy.

  Conventionally, in order to construct a dredging pipe in a high-rise building, a dredging pipe unit in which a plurality of dredging pipes are arranged in parallel is provided on a lower floor, the dredging pipe unit is lifted by a lifting means, and the dredging pipe unit is further lifted A method is known in which the work efficiency is improved by repeating the work of connecting another steel pipe unit to the lower end of the floor, and the firewood pipe is arranged in a building having a predetermined floor height (see, for example, Patent Document 1). ).

  Patent Document 1 has a spacing maintaining member for maintaining the spacing between the pipes, and the horizontal maintenance pipe unit in which the spacing maintaining members and the plurality of pipes are fixed by the fixing means is carried into the construction site by the vehicle. The method for lifting the soot tube unit in the vertical position by the lifting member of the hoist is disclosed.

Japanese Patent No. 3363402

However, in the construction of conventional pipes, there are the following problems.
In other words, welding is generally used as a method of connecting the saddle pipes in series, but in that case, the cores of the saddle pipes need to be accurately aligned, and the route interval between the joints is strictly set. It was necessary to manage to keep it. In other words, since high positioning accuracy is required, the positioning work takes time and there is room for improvement in that respect.

  The present invention has been made in view of the above-described problems, and can provide a connection jig for pipe welding that can easily perform centering work and holding work of a route interval and can improve construction efficiency. Objective.

  In order to achieve the above object, in the connection jig for pipe welding according to the present invention, when welding the connection portion with the longitudinal direction of the vertical pipe arranged in the building facing the vertical direction, A connection jig for welding a pipe for positioning pipe connection ends, a first holding body that can be attached to and detached from a first end of one of the first side pipes, and a first of the other second side pipe. A second holding body that is attachable to and detachable from the second end on the side of the dredging pipe, a guide part that is provided on the first holding body and that guides the second dredging pipe coaxially with respect to the first dredging pipe; A screw shaft that connects the holding body and the second holding body, and the screw shaft is provided such that one end of the screw shaft direction is rotatable about the direction orthogonal to the axial direction of the first vertical pipe on the first holding body The other end is supported by the second holding body so that the screw shaft direction and the axial direction of the second saddle pipe coincide with each other, and It is characterized in that it is designed to move the second holding member along the screw axis.

  In the present invention, for example, when connecting the second steel pipe in series below the first steel pipe by welding, the first holding body is attached to the lower peripheral edge of the upper first steel pipe, and the second steel pipe A second holding body is attached to the peripheral edge of the upper end side, and the lower end (other end) of the screw shaft provided on the first holding body is supported by the second holding body, and then the second holding body is aligned along the screw axis direction As a result, the upper end of the second saddle pipe comes close to the lower end of the first saddle pipe. That is, by moving the second holding body along the screw shaft, the interval between the second rod pipes and the first rod pipe (route interval at the time of welding) can be accurately adjusted easily. Furthermore, it is possible to accurately and coaxially position the first soot pipe and the second soot pipe simply by guiding the second soot pipe that moves up and down the second soot pipe to the guide part provided in the first holding part. . Thus, after a 1st soot piping and a 2nd soot piping are positioned, reliable welding is attained by welding a connection part.

  Further, in the connection jig for pipe welding according to the present invention, the second holding body is provided with an insertion hole for inserting the screw shaft in the thickness direction, and the insertion hole is held by the second rod pipe. It is preferable that the second holding body has an elongated hole shape that can move in the rotation direction around the central axis of the vertical pipe.

  Thereby, even after positioning the first and second pipes by the above-described procedure, the second pipe and the second pipe held by the second holding body with respect to the first pipe and the center axis thereof are centered. It is possible to adjust the position of movement in the rotational direction.

  Moreover, in the connection jig for pipe welding according to the present invention, the first holding body and the second holding body may each have a structure that is divided so as to sandwich the saddle pipe from the outer peripheral side.

  In this invention, it can attach easily by arrange | positioning each holding body divided | segmented on the surrounding surface of a saddle pipe, and connecting both with a volt | bolt etc., for example.

  According to the connection jig for welding pipes of the present invention, the first and second pipes can be accurately positioned in series at a predetermined interval with a simple structure, and between the two pipes. Since it becomes easy to set the route interval to an appropriate size, it is possible to improve the efficiency of the welding operation.

It is a side view which shows the state which installs saddle | piping piping using the connection jig for pipe welding by embodiment of this invention. It is a side view of the connection jig shown in FIG. It is the side view which looked at the connection jig shown in FIG. 2 from the direction orthogonal to the paper surface. It is an AA arrow directional view shown in FIG. It is a BB line arrow directional view shown in FIG. It is sectional drawing of a position adjustment mechanism, Comprising: (a) is a figure which shows the state before position adjustment, (b) is a figure which shows the state after position adjustment. (A)-(c) is a figure which shows the construction procedure of dredging piping. (A), (b) is a figure which shows the operation | movement procedure of positioning. (A)-(c) is a figure which shows the work procedure of the positioning following FIG.8 (b).

  Hereinafter, a connection jig for pipe welding according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8.

As shown in FIG. 1, the connecting jig 1 for pipe welding according to the present embodiment, for example, in the operation of welding the pipe 3 piped to the building 2 in series vertically and coaxially, both pipes In addition to positioning the three connection ends, the primary connection state is maintained until the provisional welding operation is completed. Here, the steel pipe etc. which make the predetermined length dimension of the building 2, and the outer diameter dimension are employ | adopted for the saddle pipe 3 to which the connection jig 1 is applied.
In the present embodiment, the axial direction of the vertical pipe 3 when disposed at a predetermined position is the vertical direction, and the axial direction at this time will be described below as a symbol O.

  The vertical pipes 3, 3,... Arranged in the horizontal direction are simultaneously lifted by a lifting device 4 provided above the arrangement space R of the vertical pipes 3, 3,. Positioned by the connecting jig 1 at 2C, the connecting portion P is temporarily welded. FIG. 1 shows a state in which a plurality of saddle pipes 3, 3,...

  The lifting device 4 shown in FIG. 1 includes a base 41 provided at the opening of the rooftop floor 2A of the building 2, a hoisting machine 42 fixed to one end 41a of the base 41, and a wire 43 of the hoisting machine 42. , And a plurality of fixed pulleys 44, 44,... Fixed on the base 41 at a predetermined pitch along the arrangement direction of the saddle pipe 3, and wires 43 at appropriate positions with respect to the fixed pulleys 44. It is schematically configured with a hook 45 attached to a moving pulley (not shown) to be wound.

Next, the structure of the connection jig 1 for connecting the vertical pipes 3 and 3 in series in the vertical direction will be described with reference to FIGS.
As described above, the connecting jig 1 includes the lower end side peripheral portion 3a (see FIG. 8) of the first (upper) first saddle pipe 3A (3) and the second (lower) second saddle pipe 3B (3). The upper end side peripheral edge 3b is temporarily connected until the temporary welding operation is completed.

  The connection jig 1 includes an upper holding body 11 (first holding body) that can be attached to and detached from the lower end side peripheral edge 3a (first end) of one (upper) first saddle pipe 3A, and the other (lower) first fitting. A lower holding body 12 (second holding body) that can be attached to and detached from an upper end side peripheral edge portion 3b (second end) of the two-side pipe 3B, and an upper holding body 11 are provided. A guide plate 13 (guide portion) that guides coaxially with the saddle pipe 3 </ b> A and a screw shaft 14 that connects the upper holding body 11 and the lower holding body 12 are provided.

The upper holding body 11 and the lower holding body 12 each have a structure that is divided so as to sandwich the saddle pipe 3 from the outer peripheral side. That is, as shown in FIGS. 2, 4, and 5, the upper holding body 11 includes a pair of divided upper holding bodies 11 </ b> A and 11 </ b> B having a shape along the outer peripheral direction of the saddle pipe 3, and sandwiches the saddle pipe 3. In a state of being arranged as described above, it is configured to be held by the vertical pipe 3 by being connected by the connecting bolts 15 and 15.
In addition, the upper holding body 11 is provided with a pin member 18 fixed to the lower end of the support bolt 17 penetrating in the thickness direction with the axial direction directed in the radial direction of the saddle pipe 3. The support bolt 17 is provided at a substantially intermediate position in the circumferential direction of the divided upper holding body 11A. The pin member 18 is provided with one end 14a of the screw shaft 14 so as to be rotatable about the pin central axis.

  The lower holding body 12 is also composed of a pair of members 12A and 12B having a shape along the outer circumferential direction of the saddle pipe 3 and is arranged so as to sandwich the saddle pipe 3 in the same manner as the upper holding body 11 described above. In the state, it is configured to be held by the saddle pipe 3 by being connected by the connecting bolts 16 and 16.

  The guide plate 13 shown in FIGS. 2 and 3 protrudes downward from the lower surface of the upper holding body 11, and its shape is a curved plate-like body along the outer peripheral surface of the saddle pipe 3. The guide plate 13 is provided so as to protrude downward from the lower end side peripheral portion 3a in a state where the upper holding body 11 is attached to the lower end side peripheral portion 3a (see FIG. 8) of the first saddle pipe 3A.

  The screw shaft 14 is provided in each of the divided upper holding bodies 11A and 11B, and the divided upper holding bodies 11A and 11B face each other across the central axis of the saddle pipe 3 with the saddle pipe 3 sandwiched therebetween. Placed in position. The screw shaft 14 is provided such that one end 14a in the screw shaft direction is rotatable on the upper holding body 11 around a direction orthogonal to the axial direction O of the first rod pipe 3A, and the other end 14b is in the screw shaft direction. It is configured to be supported by the lower holding body 12 so as to coincide with the axial direction of the second vertical pipe 3B, and to move the lower holding body 12 along the screw axis direction. That is, the one end 14a of the screw shaft 14 is formed with the support hole 14c through which the pin member 18 of the upper holding body 11 described above is inserted, and the pin member 18 is inserted in the state where the pin member 18 is inserted into the support hole 14c. It is rotatable around the center.

  As shown in FIG. 6A, the lower holding body 12 is provided with an insertion hole 12a through which the screw shaft 14 is inserted in the thickness direction. The insertion hole 12a has the lower holding body 12 held by the second saddle pipe 3B in a rotation direction (in the direction of arrow F shown in FIGS. 5 and 6B) around the central axis of the saddle pipe 3 It has a long hole shape that can be moved. The other end 14 b of the screw shaft 14 is inserted into the insertion hole 12 a and is screwed by a screw bolt 19 on the lower surface side of the lower holding body 12. 6 (a) and 6 (b), only the upper plate 12b of the lower holding body 12 is shown.

  Here, reference numeral 20 shown in FIGS. 5 and 6A indicates a position adjustment mechanism including an adjustment plate 21 that is fixed to the upper surface of the lower holding body 12 by a bolt 24. This position adjusting mechanism 20 is applied when correcting the circumferential displacement of the second saddle pipe 3B with respect to the first saddle pipe 3A, as shown in FIG. It is configured such that the movement can be adjusted with respect to the screw shaft 14 within the range of the insertion hole 12a of the holding body 12 and the long hole direction of the bolt hole 12c.

The adjustment plate 21 includes bolt holes 22 and 22 for the bolts 24 and screw holes 23 through which the screw shaft 14 is inserted. Each bolt hole 22 has a long hole shape that is movable in the rotation direction around the central axis of the saddle pipe 3. Further, the screw hole 23 has substantially the same diameter as the screw shaft 14. The upper plate 12b of the lower holding body 12 is provided with elongated hole holes 12c and 12c corresponding to the bolt holes 22 and 22 of the position adjusting plate 21 described above.
Then, as shown in FIG. 6B, by loosening the bolt 24 that fixes the adjustment plate 21 and the upper plate 12b, the lower holding body 12 is moved in the direction of arrow F together with the second rod pipe 3B (see FIG. 5). It is possible to move to. In this position adjustment mechanism 20, when the bolt 24 is tightened, the adjustment plate 21 and the upper plate 12b are fixed.

Next, a construction method for lifting the dredging pipe 3 and installing it in the building 2 will be described based on the drawings.
Here, an example in which a plurality of vertical pipes 3, 3,... Are lifted and connected in the vertical direction by welding using the lifting device 4 shown in FIG. That is, the hook 45 is locked to the upper end of the saddle pipe 3 located at the uppermost stage, the wire 43 is wound up by the hoisting machine 42, and the plurality of saddle pipes 3, 3,.

  Specifically, as shown in FIG. 7 (a), the suspended first-stage eaves pipe 3 (referred to as reference numeral 3A) is stopped at a height where the length direction is the vertical direction, and the second-stage eaves pipe 3 is stopped. The pipe 3 (referred to as 3B) is connected by the connection jig 1. Here, the operation of carrying the dredging pipe 3 and connecting the next-stage dredging pipe 3 with the connecting jig 1 is performed on the work floor 2B, and is continuously performed on the work floor 2B in the next process.

  Next, as shown in FIGS. 7B and 7C, the wire 43 is wound up by the hoisting machine 42 of the lifting device 1 shown in FIG. At this time, as shown in FIGS. 8 and 9, the connecting jig 1 is used to set the route interval (the interval necessary for welding) between the upper and lower saddle pipes 3A and 3B to a prescribed numerical value (for example, 2 mm). After tightening and performing spot welding on the connecting portion P, the connecting jig 1 is removed (details will be described later).

Next, main welding of the connecting portion P is performed, the wire 43 is loosened, the saddle pipe 3 is lowered, and the lower end of the second stage saddle pipe 3B is positioned directly above the work floor 2B. The welding operation (temporary welding, main welding) of the connecting portion P is performed on the floor (welding work floor 2C) one above the work floor 2B, and the welding work is continued thereafter on this welding work floor 2C. Performed (see FIG. 1).
Then, while repeating the above-described operations shown in FIGS. 7A to 7C, the third-stage, fourth-stage,... Saddle pipes 3 are sequentially added, and the construction of all-stage saddle pipes 3 is completed. .

Next, the method for positioning the saddle pipes 3A and 3B using the connecting jig 1 will be described more specifically with reference to FIGS.
As shown in FIG. 8 (a), the divided upper holding bodies 11A and 11B are sandwiched between the lower end side peripheral portion 3a of the first saddle pipe 3A, and both are fastened and fixed by a pair of bolts 15 and 15 (see FIG. 4). ). Similarly, the divided lower holding bodies 12A, 12B are sandwiched between the upper end side peripheral edge portion 3b of the second saddle pipe 3B, and both are fastened and fixed by a pair of bolts 16,16. At this time, the attachment position of the lower holding body 12 with respect to the second saddle pipe 3B is a position lowered by a predetermined dimension from the upper end side peripheral edge 3b. Then, the other end 14b of the screw shaft 14 provided in the upper holding body 11 is inserted into the insertion hole 12a (see FIG. 6) of the lower holding body 12, and the screw bolt 14b is screwed.

Subsequently, as shown in FIGS. 8B and 9A, when the first saddle pipe 3A is lifted by the lifting device 4 shown in FIG. The longitudinal direction of the 2-tube pipe 3B is lifted up in the vertical direction. Then, when the position of the connecting portion P (FIG. 9B) between the first saddle pipe 3A and the second saddle pipe 3B reaches a predetermined height on the above-described welding work floor 2C (see FIG. 1), FIG. 9 (b), by further tightening the screw bolt 19, the lower holding body 12 moves along the screw shaft 14 toward the upper holding body 11 (in the direction of arrow E), and the connection end 3c, 3d contacts each other.
At this time, the upper end side peripheral portion 3b of the lower side pipe 3B is guided and fitted to the guide plate 13, that is, the upper end side peripheral portion 3b of the second side pipe 3B is in close contact with the inner peripheral surface of the guide plate 13. In this state, the first soot pipe 3A and the second soot pipe 3B are positioned coaxially.

  And the location where the connection part P is exposed in this state is temporarily welded. Further, as shown in FIG. 9 (c), when the temporary welding is completed, the lower holding body 12 is lowered downward while loosening the screw bolt 19, until the screw shaft 14 comes off. 16 and 16 are loosened and the division | segmentation lower side holding body 12A, 12B is removed from the 2nd rod piping 3B (refer FIG. 5). And the upper holding body 11 shown in FIG. 4 also removes the divided upper holding bodies 11A and 11B from the first vertical pipe 3A by loosening the connecting bolts 15 and 15 when the screw shaft 14 is detached from the lower holding body 12. .

As described above, in the present connecting jig 1, when the second rod pipe 3B is connected in series under the first rod pipe 3A by welding, the upper holding body is attached to the lower end side peripheral portion 3a of the upper first rod pipe 3A. 11, the lower holding body 12 is attached to the upper end side peripheral edge 3 b of the second saddle pipe 3 </ b> B, and the lower end (the other end 14 b) of the screw shaft 14 provided on the upper holding body 11 is attached to the lower holding body 12. After being supported, the lower holding body 12 is moved upward along the screw axis direction, so that the connection end 3d of the second rod pipe 3B comes close to the connection end 3c of the first rod pipe 3A.
That is, by moving the lower holding body 12 along the screw shaft 14, the interval between the second rod piping 3 </ b> B and the first rod piping 3 </ b> B (route interval at the time of welding) can be accurately adjusted. Further, the first rod pipe 3A and the second rod pipe 3B are accurately coaxially aligned by simply guiding the second rod pipe 3B that moves up the second rod pipe 3B to the guide plate 13 provided on the upper holding portion 11. Can be positioned. Thus, after the 1st rod piping 3A and the 2nd rod piping 3B are positioned, reliable welding is attained by welding the connection part P. FIG.

  Further, in the connection jig 1, the lower holding body 12 is provided with an insertion hole through which the screw shaft 14 is inserted in the thickness direction, and the insertion hole is a lower holding body held by the second rod pipe 3B. 12 is in the shape of a long hole that can move in the rotational direction about the central axis of the vertical pipe 3, so that after positioning the first vertical pipe 3 </ b> A and the second vertical pipe 3 </ b> B by the above-described procedure, However, it is possible to adjust the position by moving the second rod pipe 3B sandwiched by the lower holding body 12 with respect to the first rod pipe 3A in the rotation direction around the central axis.

  Moreover, in this connection jig 1, since the upper side holding body 11 and the lower side holding body 12 have the division structure which clamps the saddle pipe 3 from the outer peripheral side, respectively, it was divided | segmented into the surrounding surface of the saddle pipe 3 The respective holding bodies 11 and 12 can be arranged and can be easily attached by connecting the both with connecting bolts 15 and 16.

  As described above, the connection jig for pipe welding according to the present embodiment can accurately position the first rod pipe 3A and the second rod pipe 3B in series with a predetermined interval with a simple structure. Since it becomes easy to set the route interval between the vertical pipes 3A and 3B to an appropriate dimension, the efficiency of the welding work can be improved.

As mentioned above, although embodiment of the connection jig for pipe welding by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, configurations such as the shape and length of the upper holding body 11, the lower holding body 12, the guide plate 13, the screw shaft 14, and the like can be arbitrarily set.
And although the upper holding body 11 and the lower holding body 12 have a divided structure, they are not limited to being divided. The number of divisions is also divided into two in this embodiment, but may be divided into three, for example. The connection between the divided holding bodies is not limited to the connection bolts 15 and 16 as in the present embodiment.

  In the present embodiment, an upper holding body 11 (first holding body) on which a screw shaft 14 is rotatably supported is attached to a first dredging pipe 3A positioned above, and a lower dredge pipe 3B is provided with a lower holding pipe 11B. Although the side holding body 12 (second holding body) is attached, it is not limited to such a form, and it is possible to attach the first holding body and the second holding body in the opposite directions. That is, the 1st holding body by which the screw shaft was rotatably supported to the lower 2nd pipe 3B may be attached, and the 2nd holding body may be attached to the upper 1st pipe 3A.

DESCRIPTION OF SYMBOLS 1 Connection jig 2 Building 2C Welding work floor 3, 3A, 3B Fired pipe 3a Lower edge side peripheral part (1st end) of fired pipe 3A
3b Periphery of the upper end side of the pipe 3B (second end)
4 Lifting device 11 Upper holding body (first holding body)
11A, 11B Split upper holder 12 Lower holder (second holder)
12A, 12B Divided lower holding body 13 Guide plate (guide section)
14 Screw shaft 14a One end of screw shaft 14b The other end of screw shaft 15, 16 Bolt P Connection

Claims (3)

This is a pipe welding connection jig for positioning the connection ends of the upper and lower saddle pipes when welding the connection part with the longitudinal direction of the saddle pipes arranged in the building oriented in the vertical direction. And
A first holding body that can be attached to and detached from the first end of the first first pipe;
A second holding body attachable to and detachable from the second end of the other second side pipe on the first side pipe side;
A guide portion that is provided on the first holding body and that coaxially guides the second side pipe with respect to the first side pipe;
A screw shaft connecting the first holding body and the second holding body;
With
The screw shaft is provided such that one end of the screw shaft direction is rotatable about the direction orthogonal to the axial direction of the first saddle pipe, and the other end of the screw shaft direction is connected to the screw shaft direction and the second. The pipe welding is characterized in that it is supported by the second holding body so as to coincide with the axial direction of the pipe, and the second holding body is moved along the screw shaft direction. Connection jig. The second holding body is provided with an insertion hole through which the screw shaft is inserted in the thickness direction.
The insertion hole has an elongated hole shape capable of moving the second holding body held by the second saddle pipe in a rotation direction around the central axis of the saddle pipe. The connection jig for pipe welding according to 1.   4. The pipe according to claim 1, wherein each of the first holding body and the second holding body has a structure that is divided so as to sandwich the saddle pipe from an outer peripheral side. 5. Connecting jig for welding.

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