JP2001091234A - Deformation-measuring device and measuring method for flange surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the deformation of both the surface and back sides of a flange concerning the planarity of the flange surface. SOLUTION: A rotary arm is supported on a support shaft erected on a mounting table, having a centering mechanism to be freely rotated and adjust the length of the arm, a first auxiliary bar is provided on the tip of the arm to control its extension length, a second auxiliary bar is provided on the tip of the first auxiliary bar to control its extension length, and an optical displacement sensor is provided on the top of the second auxiliary bar to constitute a measuring device body, which is fitted to an object of measurement via a fixture. The fitting direction of the second auxiliary bar is reversed to alternatively dispose the displacement sensor opposite to the surface or back side of a circular flange surface as an object of measurement, thereby detecting the deformation of the flange surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for measuring the amount of deformation of a flange surface, which serves as a contact surface with other elements, in a heat exchanger, a reactor, piping or the like. Things.

[0002]

2. Description of the Related Art In general, in high-temperature and high-pressure equipment in petrochemical facilities and various chemical plants, for example, in heat exchangers, reactors, and piping thereof, it is important to ensure that flange joints are prevented from leaking. It is one of the most important points for conservation.

FIGS. 19 and 20 show the configuration of a multi-tube cylindrical heat exchanger. In the multi-tube cylindrical heat exchanger, one end of the body 109 is closed by a body lid 120, and the other end of the body 109 is interposed with a tube plate 105 to form a partition chamber tube (channel) 1
The flange (hereinafter, referred to as “shell flange”) 106 formed on the other end of the body 109 with one end of the
And a flange 136 (hereinafter referred to as a “channel flange”) formed at one end of the partition chamber tube 102 using bolts and nuts. The other end surface of the partition chamber tube 102 is closed by a partition chamber lid 101.

[0004] In the case of two passes, the partition chamber tube 102 is divided into two chambers by a single partition plate 103 provided at the center of the inside thereof, and the partition tube 103 is folded in a U-shape into a body 109 and inserted therethrough. It is configured to communicate with the heat pipe 113 so that the fluid from one partition chamber inlet nozzle 128 flows out to the other partition chamber outlet nozzle 104 through the heat transfer pipe 113.
On the other hand, the body 109 has a fixed rod 111 and a spacer 11 inside.
2 has a large number of baffles 110 arranged in a staggered manner, and fluid from the body inlet nozzle 107 is
The fluid is discharged from the body outlet nozzle 125 through the flow path formed by the nozzles 0. Reference numeral 108 denotes a buffer plate for preventing the fluid from directly colliding with the heat transfer tube.

[0005] Incidentally, the flange surface of the above-mentioned equipment, for example, the contact surface of the shell flange 106, the channel flange 136, or the tube sheet 105 of the heat exchanger is deformed in the circumferential direction or the radial direction due to tightening or operation history. This deformation may lead to equipment leakage even if proper tightening management is performed. This may cause the operation of the apparatus to stop.

For this reason, conventionally, for the deformation in the circumferential direction, for example, the amount of deformation of the flange surface has been measured by measuring with a dial gauge attached to the turning arm portion of the flange facer. However, this method is very troublesome. In addition, there is a problem that not only the efficiency of the operation of measuring the amount of deformation of the flange surface is low, but also the cost is increased and the measurement cannot be easily performed.

Accordingly, the present applicant has mounted a non-contact type laser displacement sensor at the tip of the rotating arm, and the laser displacement sensor which is turned by the rotating arm and moves along the flange surface causes the deformation of the flange surface. A system for measuring the amount has been proposed (JP-A-10-160455). According to this, the displacement sensor is opposed to the circular flange surface to be measured, and the amount of deformation of the flange surface is measured while rotating the displacement sensor along the flange surface. Measurement operation is greatly improved compared with the conventional method.

[0008]

However, in the measurement of the amount of deformation of the flange surface, it is sometimes necessary to measure not only the flatness of the front surface of the flange but also the flatness on the back surface side of the flange. For example, the tube sheet 10 of FIG.
In No. 5, it is desired to improve the flatness of both surfaces of the flange portion.

In response to such a demand, the conventional system for measuring the deformation amount of the flange surface can measure the deformation amount of the front surface of the flange, but cannot measure the deformation amount on the back surface side of the flange. Was.

Accordingly, an object of the present invention is to solve the above-mentioned problems, and relates to a flatness of a flange surface, and a flange surface deformation amount measuring device capable of measuring the deformation amount on both the front surface and the back surface of the flange. It is to provide a measuring method.

[0011]

Means for Solving the Problems In order to achieve the above object, the present invention is configured as follows. According to a first aspect of the present invention, there is provided a mounting base provided with a centering mechanism, a support shaft erected on the mounting base, and rotatably supported on the support shaft about the support shaft and radially extending from the support shaft. A rotating arm which is supported so as to be adjustable in length, and is provided at the tip of the rotating arm so as to extend toward the mounting base, and the extending length is provided so as to be adjustable. A first auxiliary bar, and a second auxiliary bar attached to the distal end of the first auxiliary bar so as to extend inward in a radius around the bearing shaft and having an adjustable extension length. A bar, and an optical displacement sensor provided at a tip of the second auxiliary bar, which is a measurement target by changing a mounting direction of the second auxiliary bar to the first auxiliary bar in a reverse direction. The front and back sides of the circular flange surface A displacement sensor selectively disposed to face the shifter; and a fixture for attaching the mounting base to a central portion of the object to be measured. The device is attached to the central portion of the object to be measured via the fixture. Is rotated by the rotary arm while facing the front or back surface of the flange surface to be measured, and the amount of deformation of the flange surface is detected.

With this configuration, it is possible to measure not only the front surface of the flange but also the back surface of the flange. In other words, the front and back surfaces of the flange can be measured by one measuring device, which is very economical. In addition, when changing the measurement target from the front surface to the back surface, it is not necessary to cancel the mounting state using the mounting tool, and it is possible to perform the change while leaving the mounting base in the mounting state as it is. it can. Therefore, handling is simple.

According to a second aspect of the present invention, in the apparatus for measuring the amount of deformation of the flange surface according to the first aspect, the second auxiliary bar is provided so as to be able to be inserted into and removed from the first auxiliary bar. The attachment direction to the first auxiliary bar can be changed in the opposite direction.

According to this feature, since the attachment of the second auxiliary bar to the first auxiliary bar is of a detachable type,
The operation of changing the mounting direction of the auxiliary bar to the first auxiliary bar in the opposite direction can be performed more easily.

According to a third aspect of the present invention, in the apparatus for measuring the amount of deformation of the flange surface according to the first aspect, the second auxiliary bar is provided rotatably with respect to the first auxiliary bar, whereby the second auxiliary bar is provided. The attachment direction to the first auxiliary bar can be changed in the opposite direction.

According to this feature, since the second auxiliary bar is rotatable with respect to the first auxiliary bar, it is easier to change the mounting direction of the second auxiliary bar to the first auxiliary bar in the opposite direction. Can be done.

According to a fourth aspect of the present invention, in the apparatus for measuring the amount of deformation of the flange surface according to the first, second or third aspect, the feed for adjusting the relative movement of the second auxiliary bar relative to the first auxiliary bar is provided. A mechanism is provided.

According to this feature, since the positioning of the second auxiliary bar can be adjusted by moving the second auxiliary bar relative to the first auxiliary bar by the feed mechanism, the desired position can be easily adjusted. Can be positioned.

According to a fifth aspect of the present invention, in the apparatus for measuring the amount of deformation of the flange surface according to the first, second, third or fourth aspect, two frame members are connected so as to be able to advance and retreat at the base side as the attachment. A cross-shaped support frame formed by vertically intersecting two sets of one set of support frames, and provided with a latch for the top of the flange at the end of the support frame. Features.

According to this feature, for example, the measuring device main body can be attached to the center of the circle of the shell flange of the shell of the heat exchanger, and the measuring device can be mounted even when there is no other support such as the trunk lid. The body can be attached.

According to a sixth aspect of the present invention, there is provided the apparatus for measuring the amount of deformation of the flange surface according to the first, second, third or fourth aspect, wherein the fixture has a structure in which a clamp plate is provided on a substrate. Can be fixed to a partition plate present inside the flange to be measured.

According to this feature, when there is a partition plate inside the object to be mounted, the measuring device main body is mounted at the center of the circle of the flange by using the partition plate. Suitable for mounting the measuring device body.

According to a seventh aspect of the present invention, in the apparatus for measuring the amount of deformation of the flange surface according to the first, second, third or fourth aspect, the mounting fixture has a structure in which an anchor bolt is provided on a substrate. Can be fixed to a hole present in the tube sheet inside the flange to be measured.

According to this feature, the measuring device main body can be attached to the center of the circle of the flange by fixing the anchor bolt to the hole of the tube sheet existing inside the flange, for example, the hole of the heat transfer tube. Therefore, even when the above-mentioned support frame cannot be attached or when there is no such a partition plate as the above-mentioned partition chamber tube, the measuring device main body can be attached to the center of the flange.

An eighth aspect of the present invention is a method for measuring the amount of deformation of a flange surface using the measuring device according to any one of the first to seventh aspects, wherein the measurement of the front surface of the flange is performed. , The rotation arm, the first auxiliary bar, and the second auxiliary bar are adjusted so that the laser beam from the laser displacement sensor hits the front surface of the flange, and when the rear surface of the flange is measured, the rotation arm is used. Are extended radially outward from the flange outer peripheral surface, the first auxiliary bar is further extended toward the object side than the flange rear surface, and the mounting direction of the second auxiliary bar to the first auxiliary bar is reversed. ,
The laser beam of the laser displacement sensor is made to impinge on the back side of the flange.

According to this method, the amount of deformation of the flange surface can be measured by easily changing the surface of the laser displacement sensor which is irradiated with the laser beam from the front surface side of the flange to the rear surface side.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiment. (1) Measuring Apparatus Main Body FIG. 2 is a schematic view showing the entire configuration of the flange surface deformation measuring apparatus main body according to the present invention, FIG. 3 is a front view thereof, and FIG. 4 is a right side view thereof.

2 to 4, reference numeral 1 denotes a centering mechanism 2.
And a support shaft 3 is provided upright at the center thereof. A rotation arm 5 is rotatably supported on the support shaft 3 by a rotation support mechanism 4 about the rotation shaft, and the length of the arm extending in the radial direction from the support shaft 3 is adjustable. It is supported. Specifically, the rotation support mechanism 4 includes a block body 41 fitted on the support shaft 3 and rotatably supported by a bearing 42, a gear 43 provided integrally with the block body 41, and a rotation of the gear 43. And a driving means including a driving motor 44 for driving the motor. The rotary arm 5 has a configuration in which two parallel beams 51 are connected by a connecting plate 52. The block body 41 is provided with two guide holes so that the two beams 51 are inserted at positions on both sides of the support shaft 3, and the arm length of the rotary arm 5 is adjusted by the guide holes. A sliding mechanism is configured. Specifically, this slide mechanism forms a guide groove in the block body 41 and slidably accommodates the beam 51 of the rotary arm 5 in the guide groove, and then uses the cover plate 46 (FIG. 4) from outside the guide hole. It is configured by covering and fixing the cover plate 46 with screws 47. Reference numeral 45 denotes an encoder rotated by the gear 43.

A first auxiliary bar 6 is provided at the tip of the rotary arm 5 so as to extend toward the mounting table 1, and the length of the first auxiliary bar 6 extending from the rotary arm 5 to the mounting table 1 is adjustable. It is provided in. Specifically, the first auxiliary bar 6 is slidably fitted in the guide portion 62 of the L-shaped member 61 also serving as the connection plate 52, and the position is fixed relative to the rotary arm 5 by the screw 63. Have been. That is, the position of the first auxiliary bar 6 relative to the rotating arm 5 can be changed by loosening the screw 63.

The tip of the first auxiliary bar 6 (the lower end in FIG. 3)
, A second auxiliary bar 7 is attached so as to extend inward in a radius around the bearing shaft 3 and the extension length thereof is provided so as to be adjustable. In the case of this embodiment, the second auxiliary bar 7 is connected and fixed to the first auxiliary bar 6 by fixing an inverted T-shaped fixing plate 71 with screws 72. By loosening the screw 78, the arrow 7
By moving the second auxiliary bar 7 in three directions, the relative position of the second auxiliary bar 7 can be adjusted. Further, by removing the screw 78 and removing the second auxiliary bar 7 from the fixing plate 71, the mounting direction of the second auxiliary bar 7 to the first auxiliary bar 6 is changed in the opposite direction (vertical direction in FIG. 3). Can be.
In this embodiment, for the purpose of the relative position adjustment,
A female screw portion 74 is provided at the lower end of the fixed plate 71, and a feed mechanism 77 configured so that a feed screw 75 screwed thereto can be rotated by an adjustment knob 76 is provided.

At the end of the second auxiliary bar 7, a laser displacement sensor 8 is provided as an optical displacement sensor. The laser displacement sensor 8 has a function of emitting and receiving a visible light type laser beam 81 and measuring a change in the amount of reflected light of an object by a so-called diffuse reflection method. By changing the mounting direction of the second auxiliary bar 7 to the first auxiliary bar 6 in the vertical direction in FIG. 3, the direction of the laser light 81 emitted from the laser displacement sensor 8 also changes from downward to upward in FIG. State can be changed. This means that the laser displacement sensor 8 can be selectively disposed to face either the front surface or the back surface of the circular flange surface to be measured.

(2) Centering mechanism As shown in FIG. 1, the measuring device main body is used by being attached to the center of a circular flange 10 of a heat exchanger as an object. At this time, in order to adjust the center of the rotary arm 5 so that the center of the circle of the flange 10 is located,
The mounting base 1 is provided with a centering mechanism 2.

As shown in FIG. 5, a first movable base 21 is mounted on the mounting base 1 and is moved along the guide groove 23 formed by the guide plate 22 on the mounting base 1 in the Y direction of XY rectangular coordinates. It can be moved along (see FIGS. 6 and 7). The position adjustment in the Y direction is performed by operating the operation knob 24a of the Y direction adjustment screw 24 engaged with the female screw 24b as shown in FIG.
To move the first movable base 21 relative to the mounting base 1 in the Y direction.

On the movable table 21, a second movable table 25 is mounted, and a guide groove 27 formed by a guide plate 26 is provided.
Along the first movable base 21 along the X direction of XY rectangular coordinates (see FIG. 8). The position adjustment in the X direction is performed by rotating the operation knob 28a of the X direction adjustment screw 28 engaged with the female screw 28b as shown in FIG. 6 to move the second movable table 25 relative to the first movable table 21. Can be performed.

(3) Attachment As described above, the measuring device main body is attached to the center of the circular flange of the heat exchanger to be measured using an appropriate attachment. The structure of the attachment differs depending on the type of structure of the flange to be measured, such as an instrument, and an appropriate one is selected from a plurality of types. In this embodiment,
The partition tube 102, the trunk 109, and the tube sheet 1 of the heat exchanger of FIG.
Considering that the mounting conditions are different for each of the flanges 05, there are three types of mounting modes individually adapted thereto.

(A) Mounting Mode 1 FIG. 1 shows a mode in which the measuring apparatus main body is mounted on the opening edge of the tube 11 having the flange 10, that is, the inner edge of the flange 10 by using the mounting tool 9. This mounting form can be applied to the case where the measuring device main body is mounted on the shell flange 106 of the shell 109 of the heat exchanger in FIG. This is particularly effective when there is no support. FIGS. 9 to 12 show the configuration of the attachment 9a used in this embodiment.

As shown in FIGS. 9 and 10, the mounting member 9a is formed by connecting two frame members 92 having a sectional shape shown in FIG. As shown in FIG. 9 and FIG. 10, there is a cross-shaped support frame 91 formed by vertically intersecting two sets. That is, FIG.
As shown in the figure, the upper support frame 91b crosses the lower support frame 91a. In consideration of the steps of the upper and lower support frames 91, the lower support frame 91a
On the upper part, the leg 93a straddles the upper support frame 91b.
Is provided, and the mounting base 1 of the apparatus main body is mounted on the mounting base 93 with screws 1a.

On the other hand, inverted L-shaped latching members 94 are fixed to the top ends of the upper and lower support frames 91, respectively. It can be hooked like 11. As shown in FIG. 11, each latch member 94 is provided with a screw member 95 which can be operated by an operator's hand in order to apply a longitudinal tension to the support frame 91 after being hooked.

(I) Mounting Procedure Next, the mounting procedure will be described. First, as a preliminary preparation for measurement, cure rain and wind against the measurement equipment, remove rust, old gasket paste, dust, etc. attached to the flange surface with a brush etc., and make the gloss of the flange measurement surface uniform Brushing with a paper file or the like in order to do so.

After such preparations are made, first, a white vinyl tape is applied on the measurement surface, and as shown in FIG. Next, the mounting base 1 of the measuring device main body is mounted on the mounting base 93 of the mounting tool 9a,
Set the measuring device body on the flange surface. At this time, the length of the extending arm of the rotary arm 5 is roughly adjusted so that the laser beam 81 of the laser displacement sensor 8 comes on the surface of the flange 10 to be measured. The extension amounts of the first auxiliary bar 6 and the second auxiliary bar 7 are also roughly adjusted to appropriate values in advance.

Next, a controller unit (not shown) is set, and a detection signal (rotation angle signal) about the rotation angle of the rotation arm 5 output from the encoder 45 and a signal from a rotation origin sensor (not shown) Enter Further, a personal computer (so-called personal computer) (not shown) as an information processing device is set, and a detection signal (displacement amount signal) about flatness output from the laser displacement sensor 8 is input.

Then, under the control of the rotational position of the drive motor 44 by the controller unit, the rotary arm 5 is actually
The Y-direction adjusting screw 24 and the X-direction adjusting screw 28 of the centering mechanism 2 are repeatedly rotated while trying to rotate.
Is operated, the turning center of the laser displacement sensor 8 coincides with the center of the circle of the circular flange 10 (the turning center deviation is 1%).
mm or less). Further, the level of the rotating arm 5 is adjusted as needed. In this adjustment, the distance between the lower end of the right end of the rotary arm 5 in FIG.
The difference between the distance between the lower end of the left end and the flange surface 10 is 1 m
Adjust so as to be m / 600 mm or less. The above-mentioned personal computer adjusts the centering of the rotary arm 5 and
It is used to calculate and correct the slope of.

After the centering adjustment and the inclination correction are completed, the screws 6
3 and the screw 72 are loosened, and the extension amount of the first auxiliary bar 6 and the second auxiliary bar 7 is finely adjusted to an appropriate value and determined. The extension of the second auxiliary bar 7 is adjusted by operating the adjustment knob 76.

(Ii) Measurement Procedure Next, the measurement procedure will be described. Measurement position,
Input necessary points such as measurement radius. Then, while rotating the sensor mounting arm 5, the measurement is repeated for each desired rotation radius for each desired rotation radius, which is the resolution of the encoder 45. Here, the encoder 45 has a 200-point counter for one round (360 degrees) in the encoder 45, and takes out the measurement output data at a measurement frequency of 200 points for one round (every 1.8 degrees). The measurement data is processed and recorded by the personal computer.

The above-mentioned series of measurement operations is repeated while the radius to be measured is changed little by little, and the flatness of the entire flange in the radial direction is measured.

Next, the contents of data processing by the personal computer will be described. The personal computer automatically stores the data signal output from the laser displacement sensor 8 for a maximum of 200 points (every 1.8 degrees) for one round. In addition, the personal computer uses moving average of stored data (average of three points before and after the measurement point) for 5 degrees,
Data processing at 10, 15, 30, and 45 degrees and selection thereof are performed. Further, the personal computer calculates and corrects the display data based on the inclination in the direction perpendicular to the installation direction due to the setting of the measuring device main body (this eliminates the need for precise centering).
Then, the data before and after the correction is displayed and printed.
Further, based on the corrected data, the irregularities in the radial direction and the circumferential direction are graphically displayed and printed according to needs.

(Iii) Measurement of Flange Back Surface As described above, the flatness is measured on the flange front surface 10a as shown in FIG. 1 (a). Subsequently, when it is desired to measure the back surface 10b of the flange, for example, when measuring the back surface after measuring the front surface of the tube sheet 105,
As shown in FIG. 1 (b), the rotating arm 5 is extended radially outward from the outer peripheral surface of the flange, and the first auxiliary bar 6 is further extended to the object side than the rear surface 10b of the flange. And the direction of attachment of the second auxiliary bar 7 to the first auxiliary bar 6 is reversed so that the laser beam from the laser displacement sensor 8 strikes the back surface of the flange. The mounting base 1 will be described later (FIGS. 15 to 18).
As described above, the measurement apparatus main body is attached to the mounting base 1 in this state by being fixed to the tube sheet 105 using the holes 113a of the tube sheet 105 via the anchor bolts 901.

That is, the second auxiliary bar 7 is removed by removing the screw 72 shown in FIG. Then, the screw 47 shown in FIG. 4 is loosened to adjust the arm length of the rotary arm 5, or the set bolt 64 of the first auxiliary bar 6 and the arm 5 is loosened, and the screw 63 shown in FIG. The extension length of the auxiliary bar 6 is adjusted so that the front end thereof comes to the back side of the flange 10. Then, the second auxiliary bar 7 is loosely temporarily fixed to the tip of the first auxiliary bar 6 and the extension length of the second auxiliary bar 7 is adjusted by operating the adjustment knob 76 shown in FIG. Tighten and fix 78. In this way the second
The auxiliary bar 7 is brought to the back side of the flange 10.

The measurement of the flatness of the flange back surface 10b in the embodiment shown in FIG. 1B is performed in the same procedure as that for the flange front surface 10a described above.

Thus, the back surface of the flange 10 can be measured. According to the present embodiment, the flange 10
The front and back surfaces are measured by the same measuring device, and the original mounting state is maintained without releasing the mounting of the measuring device body. Since the measurement can be performed, it is very economical as compared with a case where a measuring device dedicated to the back surface measurement is prepared.

(B) Attachment form 2 FIG. 13 shows that the above-mentioned measuring device main body is attached to the center of the flange with the attachment 9b using the internal partition plate 103 in the partition chamber tube 102 of the heat exchanger of FIG. The form is shown. This embodiment is effective in a case where a plate-like member such as the partition plate 103 exists inside the object to be mounted, and in which the measuring device main body is mounted at the center of the flange by using the plate-shaped member.

FIG. 14 shows the structure of the fixture 9b used in this embodiment. The mounting fixture 9b has a structure in which two pairs of upper and lower clamp plates 97 are juxtaposed on a substrate 96 and fixed with screws 96a.
3 and insert the clamp screws 9 from both sides of the clamp plate 97.
9 to attach to the partition plate 103. The mounting position of the mounting tool 9b is set such that the support shaft 3 of the rotating arm 5 is located substantially at the center of the partition chamber tube 102. The attachment 9b thus attached
The mounting base 1 of the measuring device main body is mounted on the substrate 96 with the screws 1a.

FIG. 15 and FIG. 16 show, in addition to the above, an anchor bolt 901 and an L-shaped mounting bracket 902 fixed by the anchor bolt 901, and an elongated hole 903 provided by the L-shaped mounting bracket 902. , Mounting base 1 is X
This is a configuration example in which a position adjustment mechanism configured to be slightly displaced in the Y direction is added. The anchor bolt 901 may be attached to any appropriate hole such as the heat transfer tube 113.

(C) Mounting Mode 3 FIGS. 17 and 18 show the tube sheet 105 of the heat exchanger of FIG.
Then, using the heat transfer tubes 113 of the tube sheet 105,
c, the measuring device main body is flanged (tube sheet 105).
The form attached to the center is shown. This form is shown in FIG.
In the structure described in FIGS. 5 and 16, the clamp plate 97 in FIG. 16 is removed. This mode is effective when neither of the above-mentioned attachments 9a and 9b can be used.

FIG. 17 shows a case where the diameter of the hole 113a of the heat transfer tube 113 is large. A split bushing 904 made of engineering plastic or brass is inserted into the hole 113a, and a mounting bracket 902 is interposed. The anchor bolt 901 is driven in from above. The anchor bolt 901 is composed of a sheath tube 905 screw-fixed to a mounting bracket 902 and a core rod member 906 whose tip is configured to be expandable, and this core rod member 906 is driven downward relative to the sheath tube 905. . The anchor bolt 901 expands in the hole 113a and firmly fixes the mounting bracket 902 to the tube sheet 105.

FIG. 18 shows a case where the diameter of the hole 113a of the heat transfer tube 113 is small, and the split bushing 904 is omitted because it is not necessary.

As described above, the measuring device main body is attached to the center of the circular flange of the heat exchanger to be measured by using an appropriate fixture for use. Then, when measuring the front surface of the flange, FIG.
When measuring the back surface of the flange, it is used in the form suggested in FIG. 1B. That is, the front and back surfaces of the flange can be measured by one measuring device, which is economical. In addition, when changing the measurement target from the front surface to the back surface, it is not necessary to release the mounting state using the mounting fixture 9, and the mounting base 1 is left in the mounting state, and the change is executed. be able to. Therefore, handling is simple.

In the above embodiment, the second fixing plate 71
Although the auxiliary bar 7 is fixed to the first auxiliary bar 6,
The second auxiliary bar 7 is provided detachably with respect to the first auxiliary bar 6 so that the mounting direction of the second auxiliary bar 7 with respect to the first auxiliary bar 6 can be changed in the opposite direction (different direction by 180 °). Can also.

Further, a holding mechanism for holding the second auxiliary bar 7 coaxially and rotatably is provided at the lower end of the first auxiliary bar 6, whereby the mounting direction of the second auxiliary bar 7 with respect to the first auxiliary bar 6 is reversed. The direction can be changed.

[0060]

As described above, according to the present invention, a mount provided with a centering mechanism, a support shaft erected on the mount, and a support rotatable about the support shaft around the mount. A rotating arm, which is adjustable in length and extends radially from a bearing shaft, and is provided at a tip end of the rotating arm so as to extend toward the mounting table and has a length extending therefrom. A first auxiliary bar provided so as to be adjustable,
A second auxiliary bar attached to a tip of the first auxiliary bar so as to extend inward in a radius around the bearing shaft and having an adjustable extension length; An optical displacement sensor provided at the tip of an auxiliary bar, wherein the mounting direction of the second auxiliary bar with respect to the first auxiliary bar is changed in the opposite direction, thereby enabling the circular flange surface to be measured to be measured. A displacement sensor selectively disposed to face either the front surface or the back surface, and a fixture for attaching the mounting base to a central portion of the measurement target, and the device is connected to the central portion of the measurement target via the fixture. The displacement sensor is turned by the rotating arm while facing the front or back surface of the flange surface to be measured, and the amount of deformation of the flange surface is detected. Not only the measurement of the front surface (including the tube plate) can be carried out also a measurement of the back surface. This means that the front and back surfaces of the flange can be measured by one measuring device, which is very economical. In addition, when changing the measurement target from the front surface to the back surface, it is not necessary to cancel the mounting state using the mounting tool, and it is possible to perform the change while leaving the mounting base in the mounting state as it is. it can. Therefore, handling is simple.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the entire configuration of a measuring device according to an embodiment of the present invention, where (a) measures the front surface of a flange, and (b) measures the back surface of the flange. It is a figure showing a form.

FIG. 2 is a plan view of a measuring apparatus main body according to the present invention.

FIG. 3 is a front view of the measuring device main body of the present invention.

FIG. 4 is a side view of the measuring device main body of the present invention.

FIG. 5 is a plan view of a centering mechanism in the measuring device main body of the present invention.

6 is a sectional view taken along line AA of FIG.

FIG. 7 is a sectional view taken along line BB of FIG. 5;

FIG. 8 is a sectional view taken along line CC of FIG. 5;

FIG. 9 is a plan view of a fixture used in the embodiment of FIG. 1 of the present invention.

FIG. 10 is a front view showing a mounting state of the mounting tool of FIG. 9;

FIG. 11 is a partially enlarged view showing a mounting state of a distal end of the mounting tool of FIG. 9;

FIG. 12 is a sectional view of a frame member of the fixture of FIG. 9;

FIG. 13 is a schematic diagram showing an overall configuration of a measuring device according to another embodiment of the present invention.

FIG. 14 is a plan view of a fixture used in the embodiment of FIG. 13 of the present invention.

FIG. 15 is a plan view showing a modified example of the fixture of FIG. 14;

FIG. 16 is a sectional view of the fixture of FIG. 15;

FIG. 17 is a cross-sectional view showing a mounting mode using another mounting tool of the present invention.

FIG. 18 is a cross-sectional view showing a mounting mode using still another mounting tool of the present invention.

FIG. 19 is a cross-sectional view showing the structure of a conventionally known heat exchanger.

20 is a sectional view taken along the line XX-XX in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mounting base 1a screw 2 centering mechanism 3 support shaft 4 rotation support mechanism 5 rotation arm 51 beam 52 connecting plate 6 first auxiliary bar 61 L-shaped member 62 guide portion 63 screw 7 second auxiliary bar 71 fixing plate 72 screw 74 Female thread part 75 Feed screw 76 Adjustment knob 77 Feed mechanism 8 Laser displacement sensor 81 Laser light 9 Attachment 9a Attachment 9b Attachment 9c Attachment 91 Support frame 93 Attachment base 94 Hook / clamp 95 Screw member 96 Substrate 96a Screw 97 Clamp plate 99 Clamp screw 901 Anchor bolt 902 Mounting bracket 903 Elongated hole 904 Split bushing 10 Flange 10a Flange front surface 10b Flange back surface 11 Tube 102 Partition room tube 103 Partition plate 113a Hole 105 Tube plate 106 Shell flange 109 Body 136 Channel flange

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F065 AA47 AA65 BB03 FF09 FF11 GG06 HH04 JJ16 MM04 PP01 PP22 2F069 AA54 AA68 BB40 CC03 DD20 GG04 GG62 HH09 JJ10 LL10 MM04 MM32

Claims (8)

[Claims] 1. A mount provided with a centering mechanism, a support shaft erected on the mount, and supported by the support shaft so as to be rotatable about the support shaft and extending radially from the support shaft. A rotary arm having an adjustable arm length supported thereon, and a first auxiliary bar provided at a tip of the rotary arm so as to extend toward the mounting base and having an adjustable length. A second auxiliary bar attached to a tip of the first auxiliary bar so as to extend inward in a radius around the support shaft and having an adjustable extension length; An optical displacement sensor provided at a tip of a second auxiliary bar, wherein a circular flange surface to be measured is obtained by changing a mounting direction of the second auxiliary bar to the first auxiliary bar in a reverse direction. Front side or back side A displacement sensor selectively opposingly arranged, and a fixture for attaching the mounting base to a central portion of the measurement target, attaching the device to the central portion of the measurement target via the fixture, and rotating the displacement sensor for the rotation. A flange surface deformation amount measuring device, characterized in that the arm is turned while being opposed to the front surface or the back surface of the flange surface to be measured by the arm, and the deformation amount of the flange surface is detected. 2. The apparatus according to claim 1, wherein the second auxiliary bar is provided so as to be able to be inserted into and removed from the first auxiliary bar, whereby the first auxiliary bar of the second auxiliary bar is provided. An apparatus for measuring the amount of deformation of a flange surface, wherein the mounting direction with respect to a bar can be changed in a reverse direction. 3. The apparatus according to claim 1, wherein the second auxiliary bar is provided rotatably with respect to the first auxiliary bar, whereby the first auxiliary bar of the second auxiliary bar is provided. An apparatus for measuring the amount of deformation of a flange surface, wherein the mounting direction with respect to a bar can be changed in a reverse direction. 4. The apparatus according to claim 1, further comprising a feed mechanism for moving and adjusting the second auxiliary bar relative to the first auxiliary bar. An apparatus for measuring the amount of deformation of a flange surface. 5. The apparatus for measuring deformation of a flange surface according to claim 1, 2, 3, or 4, wherein a pair of supporting members are connected to each other so as to be able to move forward and backward on a base side. A flange-shaped support frame comprising a cross-shaped support frame formed by vertically intersecting two sets of frames, and provided with a latch for a top of the flange at the tip of the support frame. Deformation measuring device. 6. The apparatus for measuring the amount of deformation of a flange surface according to claim 1, 2, 3, or 4, wherein the mounting member has a structure in which a clamp plate is provided on a substrate, and the clamp plate is a flange to be measured. Characterized in that it can be fixed to a partition plate existing inside the flange surface. 7. The apparatus for measuring deformation of a flange surface according to claim 1, 2, 3 or 4, wherein the mounting fixture has a structure in which an anchor bolt is provided on a substrate, and the anchor bolt is used as a flange to be measured. A deformation amount measuring device for a flange surface, which can be fixed to a hole existing in a tube sheet inside of the flange. 8. A method for measuring the amount of deformation of a flange surface using the measuring device according to claim 1, wherein when measuring the front surface of the flange, a rotation arm, Adjust the first auxiliary bar and the second auxiliary bar so that the laser beam from the laser displacement sensor hits the front surface of the flange. When measuring the back surface of the flange, move the rotating arm from the outer peripheral surface of the flange. Also extend radially outward,
The first auxiliary bar is further extended to the object side than the rear surface of the flange, and the mounting direction of the second auxiliary bar with respect to the first auxiliary bar is reversed so that the laser beam from the laser displacement sensor hits the rear surface of the flange. A method for measuring the amount of deformation of a flange surface.