JP5877436B1 - Pipe end face measuring apparatus and pipe end face measuring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe end face measuring device and a pipe end face measuring method for measuring the end face of a pipe not provided with a flange and quickly and accurately creating a production drawing data of a welded pipe. A position measuring device 3 capable of measuring a plurality of positions of one pipe end surface 2aa, a positioning ridge 4b provided on the outer peripheral surface 2ab side, and a positioning pin 4c provided on the inner peripheral surface 2ac side. A hook holding jig 4 mounted on one end face of the pipe, and a set table 5 on which the position measuring device 3 is mounted. The pipe end surface measuring device is provided with the wire 3a in a tensioned state, the hook 3d is hooked on the hook 4a, and the spatial position of the one pipe end surface 2aa is measured. And spatial coordinate data of the other pipe end surface 2ba are acquired. [Selection] Figure 1

Description

  The present invention relates to a pipe end face measuring device used in manufacturing a welded pipe for connecting pipes used for conveying gas or liquid in ships, plants, and the like, and in particular, relative spatial coordinates of both pipe end faces that are connected to each other. The present invention relates to a pipe end face measuring device and a pipe end face measuring method for acquiring data and creating production drawing data of a welded pipe.

When measuring the external dimensions of connecting pipes such as straight pipes and bent pipes used for transporting gases and liquids in ships and plants, flanges for connection are provided at both ends when transporting fluids such as gas and water. The provided pipe (pipe) is used, and this pipe includes a bent pipe used for a bent portion in addition to a straight pipe. The bent pipe used for the bent portion is generally a connecting pipe for ease of installation work. The connecting pipe is attached to both ends of the connecting pipe having an appropriate length and an appropriate bent in advance, for example, flange A, Prepare without connecting B, and connect the flanges A and B to the flanges C and D of the pipes to which these flanges A and B are to be attached, respectively, with the flanges A and B at the ends. After the flanges A and B are temporarily attached to the end portions, the connection pipes temporarily attached with the flanges are temporarily removed and the flanges A and B are welded to both ends of the connection pipes. It was.
Currently, connection pipes (current joint pipes and mold pipes) are manufactured in the field, but most of the work involves dangers such as gas cutting, welding, and carrying heavy objects.
In addition, the finished connecting pipes are not uniform in accuracy, and the quality and the like are quite rough. Generally, pipes of this level are used. In addition, these can be systematized to determine the connection pipe fabrication drawing and the mounting flange surface orientation, that is, the position and angle, for mounting and supporting the flanges connected to both ends. A measurement method which can be manufactured is disclosed as follows.

FIG. 8A is an overall schematic view, and FIG. 8B is a side view showing a flange measuring method by a position measuring apparatus according to a conventional embodiment.
As shown in FIGS. 8A and 8B, the position measuring device E is fixed to the reference stage mounting surface 121. In addition, hook hooking jigs 122 are fixed to arbitrary three positions of the bolt holes of the flange 104 on the measured side of the measured object 103. At this time, the hook hooking jig 122 is centered by fastening with a tapered nut 123 from the back surface of the flange so that the center of the bolt hole is the center of the bolt hole. The wire 116 is pulled out from the tip of the wire guide arm 113 of the position measuring device E, and the wire tip hook 124 is hooked on the hook hooking jig 122. Since the wire 116 has tension as a wire encoder, the wire guide arm 113 tilts toward the flange 104. In this state, the output of the wire length l (el) at one measurement point P1, the turning angle θ of the wire guide arm 113 and the turntable, and the rotation angle φ of the measuring shaft 112 is input to the control unit. The remaining two points P2 and P3 are measured by the same method.

  Based on the distance data and angle data of the plurality of measurement points P1, P2, and P3 obtained by this method, a plane including the measurement points P1, P2, and P3 is calculated, and the center point P and bolt hole position of the surface are calculated. Calculate. Thus, the positional relationship between the reference stage 106 and the flange 104 to be measured can be accurately obtained (see Patent Document 1).

JP 2000-329502 A

  However, in a ship, for example, 10,000 or more pipes may be used. However, a flange that cannot be used with a pipe that requires a high pressure resistance in a ship at a site. For this reason, it was necessary to join the end faces of the pipes together by welding. The remaining problem is to measure the outer dimensions of straight pipes and bent pipes of pipes not equipped with this flange, and to create production drawing data. Furthermore, it has been very difficult to determine a reference location for installing the measuring device and set the reference data. In addition, it is usually forced to berth for about one week for pipe replacement at the next port of call, but in order to conveniently install the welded pipe at the next berth, the measured data of the welded pipe is quickly converted into electronic data. It had to be transmitted to a pipe manufacturing plant and a quick measurement was required.

  The present invention has been made in view of such circumstances, measuring the end face of a pipe not provided with a flange, and in the production of a welded pipe for connecting between pipes used for transporting gas or liquid in ships, plants, etc. It is an object of the present invention to provide a pipe end face measuring device and a pipe end face measuring method that obtain relative space coordinate data of both pipe end faces facing each other and create manufacturing drawing data of a welded pipe quickly and accurately.

Claim 1 pipe end face measuring apparatus 1 in the embodiment described, the a pipe end face 2ba of the pipe end surface 2aa and the other pipe 2b of one of the pipe 2a with the open mouth portion are opposed to each other and the measurement object, of the one A position measuring device 3 capable of measuring the length and angle with a winding type wire 3a having a hook 3d at a plurality of positions on the pipe end surface 2aa of the pipe 2a, and the pipe end surface 2aa of the one pipe 2a are mounted. The hook holding jig 4 having a hook 4a for hooking the hook 3d, and the position measuring device 3 is placed near the pipe end surface 2ba of the other pipe 2b. A set table 5 for holding and fixing the pipe 2b, and the hook latching jig 4 has the latch 4a for latching the hook 3d, and the pipe of the one pipe 2a Thickness part a positioning ridge 4b provided on the outer peripheral surface 2ab side of the one pipe 2a and two positioning pins 4d, 4d with respect to ad, and a positioning pin 4c provided on the inner peripheral surface 2ac side, The pipe end surface 2aa is attached to sandwich the pipe thickness portion 2ad, and the position measuring device 3 is placed on the set table 5 so as to face the pipe end surface 2ba of the other pipe 2b. The hook 3d is hooked on the hook 4a of the hook hooking jig 4 fixed to the end face 2aa with the wire 3a in a tension state, and the spatial position of the pipe end face 2aa in the one pipe 2a is determined. Obtaining spatial coordinate data between the pipe end surface 2aa of the one pipe 2a and the pipe end surface 2ba of the other pipe 2b by measuring. And butterflies.

The hook hooking jig 4 includes the hooking tool 4a for hooking the hook 3d, and the outer peripheral surface 2ab of the one pipe 2a with respect to the pipe thickness portion 2ad of the one pipe 2a. two positioning pins 4d provided on the side, 4d, and one with one of the positioning edge 4b, and includes an inner peripheral surface 2ac side position-decided Me pins 4c provided, mounted from the pipe end face 2aa side The pipe thickness portion 2ad is sandwiched.

Invention of Claim 2 is the pipe end surface measuring apparatus 1 of Claim 1, Comprising: While the said set table 5 hold | maintains the relative positional relationship with the axial center position of the said other pipe 2b, it is the said. Positioning for mounting and fixing one clamper 5aa and the other clamper 5ab, which are provided in a pair of left and right, and which are either close to each other or separated from each other, chuck the outer peripheral surface 2bb of the other pipe 2b, and the position measuring device 3 And a mechanism 5ac.

The invention described in claim 3 is the pipe end surface measuring device 1 according to claim 2, wherein the positioning mechanism 5a is the position obtained by extending the axis 2bd of the other pipe 2b, and the wire 3a guide The position measuring device 3 is placed and clamped so that the axis 3ec of the arm 3e to be intersected with the pivot axis 3ec of the arm 3e.

A pipe end surface measuring method according to a fourth aspect of the present invention uses the pipe end surface measuring device 1 according to the first aspect of the present invention, and the pipe end surface 2aa of the one pipe 2a and the pipe end surface 2ba of the other pipe 2b are mutually connected. The pipe end face measuring method for obtaining the spatial coordinate relationship of the above-mentioned, wherein 3 to 4 hook hooking jigs 4 are mounted on the pipe end face 2aa of the one pipe 2a, and the pipe end face of the one pipe 2a is provided. The relative positions of the spatial coordinates X, Y, Z of 2aa and the pipe end surface 2ba of the other pipe 2b are obtained.

  According to the first aspect of the present invention, the pipe end surface measuring device fixes the position measuring device to the set table provided on the basis of the pipe end surface of the other pipe, and the hook of the position measuring device placed on the set table. By hooking the wire to the hook of the hook hooking jig fixed to one pipe end face in a tensioned state, and measuring the spatial position of the pipe end face in one pipe, The spatial coordinate data of the pipe end surface and the pipe end surface of the other pipe can be acquired. As a result, the pipe end face measuring device can quickly and accurately measure the outer dimensions of the welded pipe connecting the pipes used for transporting gas or liquid in ships, plants, etc. It is possible to provide a pipe end face measuring device that obtains spatial space coordinate data and creates production drawing data of a welded pipe.

The hook latching jig has a latch for latching the hook, two positioning pins provided on the outer peripheral surface side of one pipe with respect to the pipe thickness portion of one pipe , and positioning With either one of the ridges and one positioning pin provided on the inner peripheral surface side, by mounting the pipe thickness part mounted from the pipe end surface side, the position of the pipe end surface can be accurately indicated, It is possible to provide a pipe end face measuring device that acquires relative space coordinate data of both pipe end faces that are connected to each other and creates manufacturing drawing data of a welded pipe.

According to the second aspect of the present invention, the set table mounted on the other pipe rotates the ball screw by turning the handle, and the other one of the clamper and the other which are close to or separated from each other by the rotation of the ball screw. The clamper is provided with a positioning mechanism, so that the axial center position of the other pipe can be accurately grasped, and the position measuring device can be accurately positioned at the axial center position of the other pipe. It is possible to provide a pipe end face measuring device that acquires relative space coordinate data of both opposing pipe end faces and creates manufacturing drawing data of a welded pipe.

According to the invention of claim 3 , the positioning mechanism includes a position measuring device such that the position where the axis of the other pipe is extended, the axis of the arm guiding the wire, and the pivot axis of the arm intersect. Therefore, it is possible to provide a pipe end face measuring device that acquires relative space coordinate data of both pipe end faces that are opposed to each other and creates manufacturing drawing data of a welded pipe.

According to the invention of claim 4 , 3 to 4 hook hooking jigs are mounted on the pipe end surface of one pipe, and the data of one pipe acquired as data by the three hook hooking jigs is obtained. Based on the distance data and angle data of the three positions on the pipe end face, a plane including three measurement points can be calculated, and the center point of the pipe and the coordinates of the pipe end face can be calculated. In addition, by measuring four measurement points, at least two planes including the three measurement points are calculated, and these two planes must match, so that the error can be verified. Thereby, it is possible to obtain a highly accurate spatial coordinate relationship between the pipe end face of one pipe and the pipe end face of the other pipe.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
Many pipes are provided in the ship. In addition to steam piping from the boiler room, cooling air cooling piping, piping for water such as gas, water, and sewerage, and diesel engine piping for exhaust gas, passenger ships and ships equipped with plants In some cases, 10,000 or more pipes may be used.
When connecting these pipes, for example, a high-pressure gas cannot be used with a flange because of its high pressure, so it is necessary to use a welded pipe to connect it. The welded pipe referred to here is a pipe used when connecting pipes to each other, and is a pipe used when connecting directly by welding without interposing a flange.
Conventionally, when measuring the external dimensions of pipes and bent pipes and the position of flanges in a ship where a new facility is to be constructed, a standard location for the measurement device is determined and the reference data It was very difficult to set up.
Also, in the case of repairs and replacements, it is usually necessary to berth for about a week for pipe replacement at the next port of call. Also, in order to conveniently perform repair and replacement at the next anchorage, it was necessary to quickly transmit the measurement data of the welded pipe to the pipe manufacturing factory as electronic data, and quick measurement was necessary.

FIG. 1 shows how to obtain spatial coordinate data of a pipe end face in one pipe in order to create a fabrication drawing of a welded pipe according to the first embodiment of the present invention. The side view which shows a mode that a jig for hook hooking is attached to a pipe end face, and a position measuring device is attached to the other pipe end face, and mutual spatial coordinate data of a pipe end face is acquired, (b) is (a). FIG. 6 is a cross-sectional end view taken along the line AA shown in FIG. 5, showing the case of 3-point measurement, and (c) showing the case of 4-point measurement. In addition, the attachment position of each hook latching jig does not need to be attached at equal intervals. It can be set as appropriate.
As shown in FIG. 1A, pipes without flanges are used for transporting gases and liquids, particularly for transporting high-pressure gas in ships and plants. When connecting pipes without flanges, welded pipes without flanges are also used. In order to complete the connection between the pipes, the pipe end surface measuring device 1 acquires the relative spatial coordinate data of the pipe end surfaces 2aa and 2ba facing each other and to be connected, and the production drawing data of the welded pipe 6 is obtained. It is used for creation.
The pipe end surface measuring device 1 of the present invention includes a pipe end surface 2aa of one pipe 2a, a pipe end surface 2ba of the other pipe 2b, and a plurality of pipe end surfaces 2aa of the one pipe 2a. The position measuring device 3 capable of measuring the length and angle with a winding wire 3a having a hook at the tip of the position, and a hook hook that is attached to the pipe end surface 2aa of one pipe 2a and hooks the hook. A stopping jig 4 and a set table 5 on which the position measuring device 3 is mounted and fixed by holding the other pipe 2b in the vicinity of the pipe end surface 2ba of the other pipe 2b are provided.
As shown in FIG. 1B, in the case of three-point measurement, three hook latching jigs 4 are provided by clamping the pipe thickness portion 2ad of the pipe end surface 2aa of one pipe 2a. Yes. A triangular plane is obtained by measuring the spatial coordinates of these three points. Although the thickness of the pipe is 8 mm and the diameter of the pipe is 10, 30, 60, and 100 mm, it is not limited to this.
Further, as shown in FIG. 1C, in the case of four-point measurement, four hook latching jigs 4 are provided by clamping the pipe thickness portion 2ad of the pipe end surface 2aa of one pipe 2a. It has been. By measuring these four spatial coordinates, at least two triangular planes can be obtained. The difference between the four-point measurement and the three-point measurement is that at least two triangular planes are obtained in the case of the four-point measurement, but these planes must be the same plane. It is verified that the measured values do not match if they are not on the same plane.

FIG. 2 shows an outline of a hook latching jig according to the first embodiment of the present invention, wherein (a) is a front view, (b) is a side view, and (c) is a rear view.
FIG. 3 shows an outline of mounting a hook latching jig according to the first embodiment of the present invention on a pipe, (a) is a sectional view of the pipe and a side view of the hook latching jig, ) Is a side view showing a state in which the hook is hooked on the hook of the hook hooking jig.
As shown in FIGS. 2A, 2B and 2C, and FIGS. 3A and 3B, the hook-holding jig 4 is rotatably provided with the hook 3d hooked. The hook 4a, the positioning ridge 4b provided on the outer peripheral surface 2ab side with respect to the pipe thickness portion 2ad of one pipe 2a, its support portion 4ba, and the tip provided on the inner peripheral surface 2ac side, the support portion 4ca One positioning pin 4c is provided. The positioning pin 4c is screwed to the hook latching jig 4 so as to be movable in the thickness direction of the pipe 2a. And this hook latching jig | tool 4 is clamped by the pipe thickness part 2ad from the pipe end surface 2aa side of one pipe 2a with the support part 4ba of the positioning ridge 4b, and the support part 4ca of the positioning pin 4c. That is, the pipe thickness portion 2ad is brought into contact with the support portion 4ba of the positioning ridge 4b on the outer peripheral surface 2ad side, and the positioning pin 4c on the inner peripheral surface 2ac side is fixed by screwing the butterfly bolt 4e. The hook latching jig 4 adjusts the screwing amount of the screwed positioning pin 4c, thereby adjusting the hook latching jig 4 attached to the pipe thickness portion 2ad of one pipe 2a. The position of the latch 4a can be easily set to a predetermined measurement position on the pipe end surface 2aa, and the position of the pipe end surface can be accurately indicated. The predetermined measurement position is the center of the pipe thickness portion 2ad. Most of the pipes have a thickness of 8 mm, but hook hooking jigs according to the pipe thickness may be used. The positioning pin is a bolt whose tip is processed into a round shape.

FIG. 4: shows the outline of the position measuring apparatus and set table which concern on the 1st Embodiment of this invention, (a) is a side view, (b) is a D arrow line view shown to (a).
FIG. 5 is a schematic diagram of the position measuring apparatus according to the first embodiment of the present invention.
As shown in FIGS. 4A and 4B and FIG. 5, the set table 5 includes a positioning mechanism 5a. The positioning mechanism 5a includes one clamper 5aa and the other clamper 5ab that chuck the outer peripheral surface 2bb of the other pipe 2b while maintaining a relative positional relationship with the axial center position 2bd of the other pipe 2b. The one clamper 5aa and the other clamper 5ab provided in the left and right pairs are provided with screws that are screwed into the screw pitch of the ball screw 5b, and in addition, the one clamper 5aa and the other clamper 5ab Since each screw is a reverse screw, the ball screw 5b is rotated by turning the clamper feed handle 5ac, and one clamper 5aa and the other clamper 5ab are close to or separated from each other to clamp or release the other pipe 2b. . At the same time, since the center of the position measuring device 3 is performed by turning the clamp feed handle 5ac, the position measuring device 3 is fixed by the left and right fixed handles 5ad, 5ae. That is, the ball screw 5b is divided into a normal screw and a reverse screw at an intermediate portion, and rotates by turning the clamper feed handle 5ac. Since one clamper 5aa is provided on the forward threaded portion and the other clamper 5ab is provided on the reverse threaded portion, the clamper feed handle 5ac is rotated to move toward or away from each other. Thereby, centering of one clamper 5aa and the other clamper 5ab is enabled. Slide guides 5c are provided on the left and right sides of the ball screw 5b, and slidably support one clamper 5aa and the other clamper 5ab. The other centered pipe 2b is fixed by a clamper fixing screw 5aaa and a clamper fixing screw 5aba. Here, one clamper 5aa is provided in the forward screw portion and the other clamper 5ab is provided in the reverse screw portion. However, the present invention is not limited to this, and the positions to be provided may be reversed.
The axis 2bd of the other pipe 2b intersects the center position of the set table 5, and fixed handles 5ad and 5ae for fixing the position measuring device 3 are provided on one clamper 5aa and the other clamper 5ab. In addition, the center of the position measuring device 3, that is, the position where the axis 3ea of the arm 3e that guides the wire 3a intersects the pivot axis 3ec of the arm 3e is an extension line of the axis 2bd of the other pipe 2b. Is configured to intersect. The center positioning mechanism 3b is provided so as to support the left and right sides of the arm 3e to center the arm 3e. The axis of the center positioning mechanism 3b is the same axis as the pivot axis 3ec of the arm.

6A and 6B are schematic views of the pipe end surface measuring device according to the first embodiment of the present invention, in which FIG. 6A is a side view of a pipe cross-section and a hook latching jig attached to the pipe, and FIG. It is the side view of the position measuring apparatus which hooked the wire to the hook latching jig, and the schematic of the production drawing preparation means.
As shown in FIGS. 6A and 6B, the position measuring device 3 fixed to the set table 5 derives and winds the wire 3a and can measure the length of the derived wire 3a. The wire winding portion 3i provided with the length measuring means 3ia, and the arm 3 can be measured by rotating in the direction in which the wire 3a is led out, and the wire arm 3a can be led out from the wire winding portion 3i. An arm 3e that winds up and supports the wire 3a, and a turntable 3c that turns the arm 3e in the direction in which the wire 3a is led out and can measure the swivel turning angle θ2.
The hook 3d provided at the tip of the wire 3a led out from the position measuring device 3 fixed to the set table 5 is hung on the hook 4a. At that time, the hook holding jig 4 is fixed so that the center of the pipe thickness portion 2ad of the one pipe 2a is the center.
That is, when the wire 3a is pulled out from the tip of the arm 3e of the position measuring device 3 and the hook 3d at the tip of the wire is hooked on the hook 4a of the hook hooking jig 4, the wire 3a has tension as a wire encoder. Therefore, the arm 3e for guiding the wire 3a tilts toward the one pipe 2a. In this state, the length of the wire 3a at one measurement point, the arm angle θ1, and the turning angle θ2 of the turntable 3c are input to the control unit 3h. The remaining two places are measured by the same method.

Based on distance data and angle data of a plurality of measurement points obtained by this method, a plane including the plurality of measurement points can be calculated, and the coordinates of the center point of the pipe and the pipe end surface can be calculated. The diameter of the pipe has a range of φ10 to φ30 cm, φ10 to φ60 cm, φ10 to φ100 cm, and set tables corresponding to each of them are used.
Thus, the pipe end surface measuring device 1 fixes the position measuring device 3 to the set table 5 provided with the pipe end surface 2ba of the other pipe 2b as a reference, and the position measuring device 3 placed on the set table 5 is fixed. The hook 3d is hooked to the hook 4a of the hook hooking jig 4 fixed to one pipe end face 2aa in a tension state, and the spatial position of the pipe end face 2aa in one pipe 2a is measured. By doing so, the spatial coordinate data of the pipe end surface 2aa of one pipe 2a and the pipe end surface 2ba of the other pipe 2b can be acquired.
As a result, the pipe end face measuring device can quickly and accurately measure the outer dimensions of the welded pipe connecting the pipes used for transporting gas or liquid in ships, plants, etc. It is possible to provide a pipe end face measuring device that obtains spatial space coordinate data and creates production drawing data of a welded pipe.

Next, the operation of the pipe end surface measuring apparatus according to the first embodiment will be described.
The pipe end surface measuring method is a pipe end surface measuring method in the pipe end surface measuring apparatus 1 that acquires the spatial coordinate relationship between the pipe end surface 2aa of one pipe 2a and the pipe end surface 2ba of the other pipe 2b, Three to four hooking jigs 4 are mounted on the pipe end surface 2aa of one pipe 2a, the spatial coordinates X, Y, Z of the pipe end surface 2aa of one pipe 2a and the pipe end surface 2ba of the other pipe 2b; The relative position of is obtained.
According to this, 3-4 hook hooking jigs are mounted on one pipe end face, and based on distance data and angle data of a plurality of positions of the pipe end face 2aa of one pipe 2a acquired as data. A plane including three measurement points can be calculated, and the center point of the plane can be calculated. Further, by measuring four measurement points, at least two planes including the three measurement points are calculated. At this time, these planes must be the same plane, and if these planes are not the same plane, it is possible to verify the error because the measured values do not match. As a result, the position of the axis 2bd of the other pipe 5b can be accurately grasped, and the position measuring device 3 can be accurately positioned at the position of the axis of the other pipe 2b. Coordinate data can be acquired and production drawing data of a welded pipe can be created.
Also, even pipes that cannot be equipped with flanges can be welded and repaired with high precision, safety, and ease by producing welded pipes that are based on quick and accurate production drawing data when exchanging and repairing. be able to.

<Second Embodiment>
Next, a second embodiment of a pipe end surface measuring apparatus according to the present invention will be described in detail with reference to the drawings. The second embodiment is different from the first embodiment in that the hook latching jig of the first embodiment is provided with the positioning ridge 4b as the support portion 4ba, but in the second embodiment, Two positioning pins 14b and 14b are provided.
7A and 7B are schematic views of a hook latching jig according to a second embodiment of the present invention, where FIG. 7A is a front view, FIG. 7B is a side view, and FIG. 7C is a rear view. In FIG. 7, the same components as those in FIGS. 1 to 6 are denoted by the same reference numerals, and the description thereof is omitted.
As shown in FIGS. 7A, 7B and 7C, the hook latching jig 14 has a latching tool 14a for latching the hook 3d, and the pipe thickness portion 2ad of one pipe 2a. On the other hand, two positioning pins 14b and 14b provided on the outer peripheral surface 2ab side of one pipe 2a and one positioning pin 14c provided on the inner peripheral surface 2ac side are provided. The three positioning pins 14b, 14b, and 14c are mounted from the pipe end surface 2aa side of one pipe 2a to sandwich the pipe thickness portion 2ad. The three positioning pins 14b, 14b, 14c provided on the hook latching jig 14 can be adjusted to cope with any pipe thickness, and the thickness of the pipe end surface 2aa can be adjusted. The center position in the vertical direction can be accurately grasped, and the relative spatial coordinate data of the pipe end faces 2aa and 2ba facing each other can be accurately obtained.

The preferred embodiments have been described above. However, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the gist of the present invention. For example, in order to attach the hook latching jig to the pipe end surface, the hook latching jig is provided with one positioning ridge on the outer peripheral side of the pipe and one positioning pin on the inner peripheral side. However, the present invention is not limited to these numbers and may be appropriately configured.
Further, although the positioning ridge is fixed to the hook latching jig by the bolt 4d, the position of the positioning ridge may be made variable by using a bolt whose screwing amount can be adjusted. Further, the position adjustment of the support portions of the positioning pins on the inner peripheral side and the outer peripheral side is adjusted so that the hook comes to the center of the wall thickness of the pipe and can be changed depending on the diameter of the pipe.

In order to create a production drawing of a welded pipe according to the first embodiment of the present invention, a state of obtaining spatial coordinate data of a pipe end face in one pipe is shown, and (a) shows a hook hooked on one pipe end face. A side view showing a state in which a fixing jig is attached and a position measuring device is attached to the other pipe end face to acquire mutual spatial coordinate data of the pipe end face, (b) is an AA shown in (a) It is a sectional end view of a line, shows the case of three-point measurement, and (c) shows the case of four-point measurement. BRIEF DESCRIPTION OF THE DRAWINGS The outline of the hook latching jig | tool which concerns on the 1st Embodiment of this invention is shown, (a) is a front view, (b) is a side view, (c) is a rear view. The outline which attached the jig for hook hooking concerning the 1st embodiment of the present invention to a pipe is shown, (a) is a sectional view of a pipe, and a side view of a hook hooking jig, (b) is a hook hooking. It is a side view which shows a mode that the hook was latched on the latch of the jig for a stop. BRIEF DESCRIPTION OF THE DRAWINGS The outline of the position measuring apparatus and set table which concern on the 1st Embodiment of this invention is shown, (a) is a side view, (b) is D arrow line view shown to (a). 1 is a schematic diagram of a position measuring device according to a first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic of the pipe end surface measuring apparatus which concerns on the 1st Embodiment of this invention, (a) is a side view of the hook latching jig | tool with which the pipe cross section and the pipe were mounted | worn, (b) is for hook latching It is the schematic of the side view and production drawing preparation means of the position measuring device which hooked the wire to the jig. It is the schematic of the jig | hook for hook latching concerning the 2nd Embodiment of this invention, (a) is a front view, (b) is a side view, (c) is a rear view. The measuring method by the position measuring apparatus which concerns on the conventional embodiment is shown, (a) is a whole schematic diagram, (b) is a side view showing a mode that the position of a flange is measured.

  The present invention relates to the relative space between the end faces of both pipes that are connected to each other when a welded pipe that connects pipes without flanges is used for transporting liquid or high-pressure gas in ships or plants. The present invention is applied to a pipe end face measuring device and a pipe end face measuring method for acquiring coordinate data and quickly and accurately creating manufacturing drawing data of a welded pipe.

DESCRIPTION OF SYMBOLS 1 Pipe end surface measuring apparatus 2 Pipe 2a One pipe, pipe 2aa Pipe end surface, One pipe end surface 2ab Outer peripheral surface 2ac Inner peripheral surface 2ad Pipe thickness part 2b Other pipe, pipe 2ba Pipe end surface, Other pipe end surface 2bb Outer peripheral surface 2bd shaft core, shaft core of the other pipe 3 position measuring device 3a wire 3b center positioning mechanism 3c swivel base 3ca swing angle (θ2) measuring means 3d hook 3e arm 3ea shaft core, arm shaft 3eb arm angle (θ1) Measuring means 3ec Shaft core, arm pivot axis 3f Mounting base 3g Substrate 3h Control unit 3i Wire winding unit 3ia Wire lead length measuring means 4, 14 Hook latching jig 4a, 14a Hook 4b Positioning ridge 4ba, 14ba Support part 4c, 14b, 14c Positioning pin 4ca, 14ba, 14ca Holding part 4d, 14d Bolt 4e, 14e Butterfly bolt 4f, 14f Handle 4g, 14g Nut 4h, 14h Disk 5 Set table 5a Positioning mechanism 5aa One clamper 5aa Clamper fixing screw 5ab Other clamper 5aba Clamper fixing screw 5ac Clamper handle 5ad Fixed handle 5ae Fixed handle 5b Ball screw 5c Sliding guide 6 Welded pipe 7 Production drawing creation means 7a Cable 7b Monitor 7c Key 7d Production drawing

Claims (4)

When manufacturing a welded pipe for connecting pipes used for conveying gas or liquid in ships or plants, the relative spatial coordinate data of the pipe end faces (2aa, 2ba) facing each other is acquired to obtain a welded pipe ( 6) A pipe end face measuring device (1) for creating production drawing data.
The pipe end surface measuring device (1),
Pipe end surface of one of the pipes open mouth are opposed to each other (2a) and (2aa) pipe end face of the other pipe (2b) and (2ba) and measured object,
A position measuring device (3) for measuring the length and angle of a plurality of positions of the pipe end surface (2aa) of the one pipe (2a) with a winding wire (3a) having a hook (3d) at the tip;
A hook-holding jig (4) provided with a hook (4a) that is attached to the pipe end surface (2aa) of the one pipe (2a) and hooks the hook (3d);
A set table (5) for holding and fixing the other pipe (2b) in the vicinity of the pipe end surface (2ba) of the other pipe (2b) on which the position measuring device (3) is placed;
With
The hook hooking jig (4) includes the hooking tool (4a) for hooking the hook (3d), and the pipe thickness portion (2ad) of the one pipe (2a) is One of the two positioning pins (4d, 4d) and the positioning ridge (4b) provided on the outer peripheral surface (2ab) side of one pipe (2a) and the inner peripheral surface (2ac) side A positioning pin (4c), and is attached from the pipe end surface (2aa) side to sandwich the pipe thickness portion (2ad),
The hook for fixing the position measuring device (3) to the set table (5) facing the pipe end surface (2ba) of the other pipe (2b) and being fixed to the one pipe end surface (2aa) The hook (3d) is hooked with the wire (3a) in a tension state on the hook (4a) of the hooking jig (4), and the pipe end surface (2aa) of the one pipe (2a) is hooked. The spatial coordinate data of the pipe end surface (2aa) of the one pipe (2a) and the pipe end surface (2ba) of the other pipe (2b) are obtained by measuring the spatial position. Pipe end face measuring device (1).   The set table (5) is provided in a pair of left and right sides that chuck the outer peripheral surface (2bb) of the other pipe (2b) while maintaining a relative positional relationship with the axial center position of the other pipe (2b). And one clamper (5aa) that performs either proximity or separation to each other, the other clamper (5ab), and a positioning mechanism (5a) for mounting and fixing the position measuring device (3). Pipe end face measuring device (1) according to claim 1, characterized in that it is characterized in that   The positioning mechanism (5a) includes a position where the axis (2bd) of the other pipe (2b) is extended, an axis (3ec) of an arm (3e) for guiding the wire (3a), and the arm ( The pipe end face measuring device (1) according to claim 2, wherein the position measuring device (3) is placed and clamped so as to intersect with the pivot axis (3ec) of 3e). Using the pipe end face measuring device (1) according to claim 1, the spatial coordinates of the pipe end face (2aa) of the one pipe (2a) and the pipe end face (2ba) of the other pipe (2b). A pipe end face measuring method for acquiring data,
Three to four hook hooking jigs (4) are mounted on the pipe end surface (2aa) of the one pipe (2a), and the spatial coordinates of the pipe end surface (2aa) of the one pipe (2a) ( X, Y, Z) and the relative position with respect to the pipe end surface (2ba) of said other pipe (2b) are acquired, The pipe end surface measuring method characterized by the above-mentioned.

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