Distance measuring device and distance measuring method

Abstract

Provided are a distance measuring device and a distance measuring method capable of simply and quickly measuring the distance from the opening of a reaction tube to a granular solid filled in the reaction tube. The distance measuring device (10) comprises a measuring member (300) holding a length measuring device (100) and at least one guide member (200) (base member) for movably configuring the measuring member. A straight line parallel to the direction in which the measuring member configured on the base member moves is set as a reference line, and an angle formed by a straight line parallel to the axial length direction (D2) of the reaction tube (910) and the reference line on the same plane is constant for a plurality of reaction tubes arranged along the reference line. The measuring direction (D1) of the length measuring device is parallel to the axial length direction of the reaction tube when the measuring member is configured on the base member. The measuring member is configured on the base member so as to be able to move sequentially from a position (P1 (P2)) for measuring the distance of one reaction tube to a position (P2 (P3)) for measuring the distance of another reaction tube.

Description

Technical Field

[0001] The invention relates to a distance measuring device and a distance measuring method. Background Art

[0002] In the field of petrochemical industry, many contact reactions such as decomposition reaction, modification reaction, oxidation reaction, ammoxidation reaction, reduction reaction, etc. of hydrocarbons using multi-tubular reactors are implemented. The reactor used in these reactions has several thousand to tens of thousands of reaction tubes, and the reaction tubes are filled with catalysts suitable for each contact reaction, inactive substances and other granular solids (hereinafter, the catalysts and other granular solids filled in the reaction tubes are sometimes referred to as "solids" or "fillers"). For example, Patent Document 1 discloses a method in which a filling layer of inactive substances is provided between a layer filled with a catalyst for a previous reaction and a layer filled with a catalyst for a subsequent reaction, and a heat exchange type multi-tubular reactor is used to produce acrylic acid from propylene by a two-stage contact gas phase oxidation reaction.

[0003] It is important to control the filling height of the filler within a certain management range so that the reaction can be carried out in a better state using the above-mentioned multi-tubular reactor. When the filling height of the catalyst in each reaction tube is not constant, the reaction of each reaction tube will deviate, which may lead to a decrease in the reaction rate and the yield as a whole, and may cause the reaction to get out of control in some reaction tubes. For example, Patent Document 2 discloses a catalyst filling method, which is characterized in that the catalyst is filled into each reaction tube in a manner such that the difference between the filling height of each reaction tube and the average value of these filling heights is within ±20% of the average value of the filling height. Therefore, usually, during the catalyst filling operation, the filling height of the filler filled in each reaction tube is measured.

[0004] The filling height of the filling material is measured by measuring the distance from the opening of the reaction tube to the filling material (hereinafter also referred to as "space length").

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 11-130722

[0008] Patent Document 2: Japanese Patent Application Publication No. 2003-340267 Summary of the invention

[0009] Problem that the invention aims to solve

[0010] Generally speaking, the upper end of the reaction tube of a multi-tube reactor is structured as follows: the reaction tube is inserted into each hole of the porous plate, and the connection between the porous plate and the reaction tube is welded. The porous plate to which the reaction tube is joined is called a tube sheet, and the surface of the tube sheet is called a tube sheet surface. The surface of the porous plate itself before welding the reaction tube is smooth. However, the surface of the tube sheet after the reaction tube is welded is uneven due to welding marks such as weld beads and sputtering, resulting in an uneven portion.

[0011] When, for example, a laser distance meter mounted on a common tripod is used as a length measuring device, when attempting to measure the spatial length from above the upper tube plate of a reactor, one or more of the legs of the tripod may be placed on a welding mark or directly above the opening of the reaction tube. Therefore, when measuring the spatial length of a plurality of reaction tubes, it is impossible to always make the measuring direction of the laser distance meter parallel to the axial length direction of the reaction tubes. Even if the spatial length of any reaction tube can be measured, it may not be possible to measure the spatial length of another reaction tube, and there is a problem that the measuring direction must be adjusted each time.

[0012] The inventors have found that by providing a base member such as a guide rail on the tube plate and arranging a measuring member such as a tripod equipped with a length measuring device such as a laser rangefinder on the base member, the spatial length of any reaction tube can be stably measured without being affected by the unevenness of the welding mark. In addition, it has been found that in this method, by sliding the tripod along the guide rail, the spatial lengths of a plurality of reaction tubes can be continuously measured.

[0013] As described above, the inventors have found that by making the measuring member holding the length measuring device movable on the base member, it is possible to stably and quickly measure the length of a space in a non-contact manner, and thus invented the present invention.

[0014] Therefore, an object of the present invention is to provide a distance measuring device and a distance measuring method capable of simply and quickly measuring the distance from the opening of a reaction tube to a granular solid material filled in the reaction tube.

[0015] Solutions for solving problems

[0016] A distance measuring device according to one embodiment of the present invention is a device that measures the distance from an opening formed at an end of a plurality of reaction tubes arranged in parallel to each other on a tube sheet to a catalyst and / or a granular solid material filled in the reaction tube in a non-contact manner for at least a portion of the plurality of reaction tubes. The distance measuring device comprises: a measuring member that holds a length measuring device; and at least one base member that arranges the measuring member so that it can move. A straight line parallel to the direction in which the measuring member arranged on the base member moves is set as a reference line, and an angle formed by a straight line parallel to the axial direction of the reaction tube and the reference line on the same plane is constant for the plurality of reaction tubes arranged along the reference line. The measuring direction of the length measuring device is parallel to the axial direction of the reaction tube when the measuring member is arranged on the base member, and the measuring member is arranged on the base member so that it can move sequentially from a position where the distance of one reaction tube is measured to a position where the distance of another reaction tube is measured.

[0017] A distance measuring method according to another embodiment of the present invention is a method for measuring the distance from an opening formed at an end of a plurality of reaction tubes arranged in parallel to each other on a tube sheet to a catalyst and / or a particulate solid substance of an inactive substance filled in the reaction tube in a non-contact manner for at least a portion of the plurality of reaction tubes. In the distance measuring method, a measuring member holding a length measuring device is movably arranged on a base member, a straight line parallel to the direction in which the measuring member arranged on the base member moves is set as a reference line, an angle formed by a straight line parallel to the axial direction of the reaction tube and the reference line on the same plane is constant for the plurality of reaction tubes arranged along the reference line, the measuring direction of the length measuring device is parallel to the axial direction of the reaction tube when the measuring member is arranged on the base member, and the measuring member is sequentially moved from a position where the distance of one reaction tube is measured to a position where the distance of another reaction tube is measured, thereby sequentially measuring the distance.

[0018] Effects of the Invention

[0019] According to the present invention, it is not necessary to repeatedly perform the adjustment operation of making the measurement direction measured by the length measuring device parallel to the axial length direction of the reaction tube. By sequentially moving the measuring member along the base member, the distance from the opening of the reaction tube to the granular solid material filled in the reaction tube can be simply and quickly measured in a non-contact manner for a plurality of reaction tubes. Therefore, the time required for filling / replacing the filler can be shortened, thereby reducing the cost associated with the operation and contributing to improving the operating rate of the equipment.

[0020] In addition, it is important to control the filling height of the filling material within the reaction tube within a certain management range without damaging the filling material in the reaction tube, so that the reactor can react in a better state. According to the present invention, the distance can be measured quickly without damaging the filling material such as fragile catalyst, so that the filling height of the filling material can be quickly controlled within a certain management range, and the reaction can be carried out stably for a long period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 (A) is a perspective view schematically showing the distance measuring device according to the first embodiment. Figure 1 (B) is along Figure 1 A cross-sectional view of line 1B-1B of (A).

[0022] Figure 2 The figure schematically shows how the distance from the opening formed at the end of the reaction tube in the axial direction to the catalyst and / or inactive material granular solid matter filled in the reaction tube is sequentially measured in a non-contact manner by a distance measuring device.

[0023] Figure 3A This is a schematic diagram for explaining the angle formed on the same plane between a straight line parallel to the axial direction of the reaction tube and the reference line when a straight line parallel to the direction in which the measuring member disposed on the base member moves is set as a reference line.

[0024] Figure 3B (A) is a perspective view showing the relationship between the contact surface of the base member and the axial length direction of the reaction tube, Figure 3B (B) is an enlarged representation Figure 3B (A) is a stereoscopic view of the portion 3B surrounded by a two-dot chain line.

[0025] Figure 3C (A) Figure 3C (B) Figure 3C (C) and Figure 3C (D) is a cross-sectional view schematically showing various forms of contact between the base member and the measuring member.

[0026] Figure 4(A) is a cross-sectional view showing a tube sheet to which a plurality of reaction tubes are joined. Figure 4 (B) indicates the tube sheet Figure 4 (A) is a top view of the device.

[0027] Figure 5 This is a diagram that simply shows a reactor including a plurality of reaction tubes and schematically shows how the distance from the opening of the reaction tube to the solid matter is measured.

[0028] Figure 6 It is a perspective view schematically showing a distance measurement device according to a second embodiment.

[0029] Figure 7 It is along Figure 6 Cross-sectional view of line 7-7.

[0030] Figure 8 It is a perspective view schematically showing a distance measuring device according to a third embodiment.

[0031] Fig. 9 (A) is along Figure 8 The cross-sectional view of line 9A-9A, Fig. 9 (B) is an enlarged representation Fig. 9 9B is a cross-sectional view of a portion surrounded by a two-dot chain line in (A).

[0032] Fig.10 It is along Figure 8 Cross-sectional view along line 10-10.

[0033] Fig.11 (A) shows the distance measuring device of the fourth embodiment. Fig. 9 (A) is a cross-sectional view corresponding to Fig.11 (B) is an enlarged representation Fig.11 (A) is a cross-sectional view of a portion 11B surrounded by a two-dot chain line.

[0034] Fig.12 It is a perspective view schematically showing a distance measuring device according to a fifth embodiment.

[0035] Fig.13 is a sixth embodiment of the distance measuring device. Figure 1 (B) is a corresponding cross-sectional view.

[0036] Fig.14 is a seventh embodiment of the distance measuring device. Figure 2 Comparative cross-sectional view.

[0037] Fig.15 is a distance measuring device according to an eighth embodiment of the present invention. Figure 2 Comparative cross-sectional view.

[0038] Fig.16 This is a perspective view schematically showing a state in which Reference Example 1 of the distance measurement method is realized.

[0039] Fig.17 This is a diagram schematically showing how Reference Example 2 of the distance measurement method is implemented.

[0040] Fig.18 (A) is a cross-sectional view showing a tube sheet to which a plurality of reaction tubes are joined. Fig.18 (B) indicates the tube sheet Fig.18 (A) is a top view of the device. DETAILED DESCRIPTION

[0041] In a reactor formed by joining a plurality of reaction tubes arranged in parallel to each other to a tube sheet, the distance measuring device of the present invention can measure the distance from an opening formed at the end of the reaction tube in the axial length direction to the catalyst and / or granular solids of inactive substances filled in the interior of the reaction tube in a non-contact manner. The distance measurement can be performed on only a part of the reaction tubes contained in the reactor, or on all the reaction tubes contained in the reactor. That is, the distance measurement can be performed on at least a part of the reaction tubes among the plurality of reaction tubes. The distance measuring device comprises: a measuring member holding a length measuring device and at least one base member configured to enable the measuring member to move. A straight line parallel to the direction in which the measuring member configured on the base member moves is set as a reference line, and the angle formed by the straight line parallel to the axial length direction of the reaction tube and the reference line on the same plane is constant in the plurality of reaction tubes arranged along the reference line. When the measuring member is arranged on the base member, the measuring direction of the length gauge is parallel to the axial direction of the reaction tube, and the measuring member is arranged on the base member in a manner that can be moved sequentially from the position where the distance of one reaction tube is measured to the position where the distance of another reaction tube is measured. In this specification, "base member" is defined as a member that can configure the measuring member to be movable, and the specific structure is not limited as long as the measuring member can be moved. In addition, "measuring member" is defined as a member that includes a length gauge and is configured to the base member. In addition, in this specification, "a straight line parallel to the direction in which the measuring member arranged on the base member moves" refers to a straight line parallel to the direction (vector) in which the measuring member moves on the projection plane when the tube plate is viewed from above. In addition, "a straight line parallel to the axial direction of the reaction tube" refers to a straight line parallel to the axial direction (vector) of the reaction tube on any of the two projection planes when the two planes perpendicular to the projection plane when the tube plate is viewed from above are set as projection planes.

[0042] The measuring member disposed on the base member is capable of sliding movement. The base member has, for example, a guide rail shape or a plate shape. In addition, in this specification, "sliding movement" means that the measuring member moves smoothly along the reference line when it is disposed on the base member, and also includes a form in which the measuring member moves by rotating a bearing, roller, etc. provided by the measuring member or the base member.

[0043] Of course, the base member is not parallel to the axial direction of the reaction tube, but faces a direction intersecting the axial direction of the reaction tube. The distance measuring device can also have a support leg that supports the base member and mounts the base member on the tube sheet in a manner that can be easily loaded and unloaded. The base member can be arranged on the tube sheet with the help of the support leg. Either a support leg with a fixed height (length) or a support leg that can adjust the height (length) can be used. The height (length) of the support leg can be used to determine the height of the base member from the tube sheet. In addition, the base member can be mounted to the reaction tube with the help of a support leg inserted into the opening of the reaction tube.

[0044] As defined above, the "measuring member" includes a member for being configured on the base member. The member for configuring the measuring member on the base member can be changed in various ways. For example, the measuring member can have three or more leg members configured on the base member, a plate member configured on the base member, or a slide member configured on the base member. In addition, the measuring member is not limited to a form that is moved manually, and can have a traveling trolley that is configured on the base member and can move automatically.

[0045] In addition, in this specification, the word "arrange" means "placing a certain member on another member in a contacting manner". For example, "a measuring member arranged on a base member" means "a measuring member that can be placed on the base member in a contacting manner", "a state in which the measuring member is arranged on the base member" means "a state in which the measuring member is placed on the base member in a contacting manner", and "a base member arranged on a tube sheet" means "a base member can be placed on the tube sheet in a contacting manner". In addition, the word "contacting" means "a certain member is actually in contact with another member".

[0046] The following describes the embodiments and various modifications of the present invention with reference to the accompanying drawings. The following description is not intended to limit the technical scope and meaning of the terms described in the claims. In addition, the dimensional ratios of the drawings are exaggerated for the convenience of explanation and are sometimes different from the actual ratios. In addition, in this specification, the range "X to Y" shown means "above X and below Y".

[0047] <Distance Measurement Device 10 (First Embodiment)>

[0048] First, the distance measurement device 10 according to the first embodiment will be described.

[0049] Figure 1 (A) is a perspective view schematically showing a distance measuring device 10 according to the first embodiment. Figure 1 (B) is along Figure 1 A cross-sectional view of line 1B-1B of (A). Figure 2 The diagram schematically shows how the distance from an opening 911 formed at the end of a reaction tube 910 in the axial direction D2 to a granular solid material 920 of a catalyst and / or an inactive substance filled in the reaction tube 910 is sequentially measured in a non-contact manner using the distance measuring device 10 . Figure 3A This is a schematic diagram for explaining an angle α formed on the same plane N by a straight line L1 parallel to the axial direction of the reaction tube 910 and the reference line L0 when a straight line parallel to the direction in which the measuring member disposed on the base member moves is set as the reference line L0. Figure 3B (A) is a perspective view showing the relationship between the contact surface 220 of the base member 200 and the axial length direction D2 of the reaction tube 910. Figure 3B (B) is an enlarged representation Figure 3B (A) is a stereoscopic view of the portion 3B surrounded by a two-dot chain line. Figure 3C (A) Figure 3C (B) Figure 3C (C) and Figure 3C (D) is a cross-sectional view schematically showing various forms of contact between the base member and the measuring member. Figure 4 (A) is a cross-sectional view showing a tube sheet 916 to which a plurality of reaction tubes 910 are joined. Figure 4 (B) is a top view showing the tube sheet 916. Figure 5 9 is a diagram schematically showing a reactor 900 having a plurality of reaction tubes 910 and schematically showing how the distance from the opening 911 of the reaction tube 910 to the solid matter 920 is measured. Figure 1 The straight line Lm indicated by the two-dot chain line in (A) represents the row of reaction tubes 910 for measuring the spatial length by sequentially moving the measuring member 300 . Figure 2 The reference numerals P1, P2, and P3 shown schematically represent the positions where the length of the space is measured by the length measuring device 100. The axial length direction D2 of the reaction tube 910 is Figure 2 and Figure 5 The up and down directions in .

[0050] Reference Figure 1 (A) Figure 2 as well as Figure 5To briefly describe, the distance measuring device 10 is used to: in a reactor 900 formed by joining a plurality of reaction tubes 910 arranged parallel to each other to a tube plate 916, for at least a portion of the plurality of reaction tubes 910, measure in a non-contact manner the distance from an opening 911 formed at the end of the reaction tube 910 in the axial length direction D2 to a granular solid 920 of a catalyst and / or an inactive substance filled in the interior of the reaction tube 910. The distance measuring device 10 can have a measuring member 300 that holds a length measuring device 100 and at least one guide rail member 200 (equivalent to a base member) that configures the measuring member 300 to be movable. Figure 3A As shown, a straight line parallel to the direction in which the measuring member 300 disposed on the guide member 200 moves is set as the reference line L0, and an angle α formed by a straight line L1 parallel to the axial length direction D2 of the reaction tube 910 and the reference line L0 on the same plane N is constant for the plurality of reaction tubes 910 arranged along the reference line L0. Figure 2 As shown, when the measuring member 300 is arranged on the rail member 200, the measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910. In addition, the measuring member 300 can be arranged on the rail member 200 so as to be movable from the position P1 (P2) at which the distance of one reaction tube 910 is measured to the position P2 (P3) at which the distance of another reaction tube 910 is measured.

[0051] like Figure 2 , Figure 4 (A) Figure 4 (B) and Figure 5 As shown, the reactor 900 has a plurality of reaction tubes 910 arranged in parallel with each other. The plurality of reaction tubes 910 in the reactor 900 are usually arranged in a triangular staggered arrangement, a square straight arrangement, a square staggered arrangement, etc., so that the distances between adjacent reaction tubes are as equal as possible. For example, in the case of a triangular staggered arrangement, the plurality of reaction tubes 910 are arranged at a predetermined pitch pa (see Figure 4 (B)). The upper ends of the plurality of reaction tubes 910 are joined to the tube sheet 916 by welding. The tube sheet surface is uneven due to welding marks such as weld beads and sputtering, resulting in an uneven portion. However, the welding marks are concentrated on the outer periphery of the reaction tube 910. Therefore, there are no welding marks in the middle portion between one reaction tube 910 and another adjacent reaction tube 910, and the tube sheet 916 can have a smooth surface 930. The angle between the smooth surface 930 of the tube sheet 916 and the axial length direction D2 of the reaction tube 910 is constant, and usually, the axial length direction D2 of the reaction tube 910 is perpendicular to the smooth surface 930 of the tube sheet 916.

[0052] like Figure 1 (A) and Figure 2As shown, the measuring member 300 can be arranged on the contact surface 220 of the guide member 200. The contact surface 220 of the guide member 200 can be set as a smooth and continuous plane. In this case, the measuring member 300 can slide and move in a state where the measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910 while being arranged on the contact surface 220. The distance measuring device 10 can have a plurality of guide members 200. When the tube plate 916 is viewed from above, a plurality of (for example, two) guide members 200 can be arranged in parallel.

[0053] like Figure 1 As shown in (B), the guide rail member 200 can be composed of a member having a guide rail shape in cross section. The leg member 303 described later of the measuring member 300 can have a tip portion with a tapered shape (nail shape). The guide rail member 200 can have a guide groove 221 for guiding the tip portion of the leg member 303 in a manner that does not cause the tip portion of the leg member 303 to fall off.

[0054] The distance measuring device 10 may further include a support leg 201 that supports the guide member 200 and mounts the guide member 200 on the tube sheet 916 in a detachable manner. The support leg 201 may be mounted on the lower surface of the guide member 200. The guide member 200 may be arranged on the smooth surface 930 of the tube sheet 916 with the aid of the support leg 201. The support leg 201 may not be arranged on the smooth surface 930 of the tube sheet 916 as long as the guide member 200 is stably arranged without shaking. After adjusting the mounting position, the guide member 200 may be fixed to the outer peripheral wall of the reactor 900, the reaction tube 910, etc. using a clamping jig not shown. In addition, the shape and structure of the support leg are not limited as long as it can support the guide member 200 and mount the guide member 200 on the tube sheet 916 in a detachable manner. For example, it may have a slender rod shape, a hollow tube shape, or a plate shape.

[0055] Figure 3A The straight line L0 shown is a straight line parallel to the direction in which the measuring member arranged on the base member moves. This straight line is referred to as "reference line L0". The straight line L1 is a straight line parallel to the axial length direction of the reaction tube 910. The plurality of reaction tubes 910 are parallel to each other. Therefore, the angle α formed by the straight line L1 and the reference line L0 on the same plane N is constant for the plurality of reaction tubes 910 arranged along the reference line L0. In addition, when looking down at the tube plate 916 from above, the reference line L0 and the reference line L0 are Figure 1 (A) and Figure 3BThe plurality of reaction tubes 910 are arranged along the straight line Lm, and therefore, for convenience, are also referred to as "a plurality of reaction tubes 910 arranged along the reference line L0" in this specification.

[0056] Figure 3B (A) and Figure 3B The X-axis and Y-axis shown in (B) represent two straight lines on the contact surface 220 of the guide rail member 200 , and the X-axis and Y-axis are orthogonal to each other. The Z-axis represents a straight line perpendicular to the two straight lines of the X-axis and the Y-axis, and is perpendicular to the contact surface 220 . Figure 3B (B) makes the origin of the XYZ coordinate coincide with the point where the axial length direction D2 of the reaction tube 910 passes through the contact surface 220. In addition, the straight line Lm represents the row of reaction tubes 910 for measuring the spatial length by sequentially moving the measuring member 300. As shown in the figure, when the guide member 200 is installed in the reactor 900, the axial length direction D2 of the reaction tube 910 may not be perpendicular to the contact surface 220 of the guide member 200. Figure 3B (B) shows that the axial direction D2 of the reaction tube 910 is tilted so as to pass through the point (x0, y0, z0) of the XYZ coordinates without passing through the Z axis. As described above, the angle α formed by the straight line L1 parallel to the axial direction D2 of the reaction tube 910 and the reference line L0 on the same plane N is constant for the plurality of reaction tubes 910 arranged along the reference line L0. Therefore, all the axial directions D2 passing through the contact surface 220 are tilted in the same manner. Even when the axial direction D2 of the reaction tube 910 is not perpendicular to the contact surface 220 of the guide member 200, since the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 when the measuring member 300 is arranged on the guide member 200, the distance (spatial length) from the opening 911 of the reaction tube 910 to the solid matter 920 can be measured.

[0057] Various forms of contact between the base member and the measuring member are described. The shape (structure) of contact between the base member and the measuring member can be any shape (structure) that enables the measuring member to slide straight when the measuring member is arranged on the base member. For example, Figure 3C As shown in (A), the contact surface 341a of the base member 341 can be set as a smooth and continuous plane, and the contact surface 342a of the measuring member 342 can be set as a smooth and continuous plane, so that the base member 341 and the measuring member 342 are in "surface" contact. Figure 3CAs shown in (B), the contact surface 343a of the base member 343 can be set as a concave-convex surface protruding in a triangular shape, and the contact surface 344a of the measuring member 344 can be set as a smooth and continuous plane, so that the base member 343 and the measuring member 344 are in "line" contact. Figure 3C In (B), the direction in which the measuring member 344 slides is perpendicular to the paper surface. Figure 3C As shown in (C), the contact surface 345a of the base member 345 can be set to a smooth and continuous plane, and the contact surface 346a of the measuring member 346 can be set to a spherical surface such as a bearing, so that the base member 345 and the measuring member 346 are in "point" contact. Figure 3C As shown in (D), the contact surface 347a of the base member 347 can be set as a curved surface, and the contact surface 348a of the measuring member 348 can be set as a spherical surface such as a bearing, so that the base member 347 and the measuring member 348 are in contact at a "point". Figure 3C In (D), the contact surface 347a of the base member 347 can have a shape like the inner surface obtained by cutting a tube, and can be a smooth straight line in the direction (direction perpendicular to the paper surface) in which the measuring member 348 slides, and can be a downwardly convex curved surface in the direction (direction of the paper surface) perpendicular to the direction in which the measuring member 348 slides. As can be seen from the above description, even if the contact surface of the base member is not a smooth and continuous plane, the measuring member can slide while being arranged on the base member.

[0058] The length measuring device 100 is not limited in type as long as it measures the distance in a non-contact manner. For example, the length measuring device 100 can use a known device that measures the distance in a non-contact manner using laser, sound waves, or microwaves, and a laser length measuring device is particularly preferred.

[0059] The principle of the laser length measuring device is roughly divided into a triangulation distance measuring method, a time-of-flight method, and a phase difference method, but there is no particular limitation. The type of laser is not particularly limited, but generally a laser with a wavelength of 635nm. As the model of the laser length measuring device, for example, portable models such as the laser distance measuring device manufactured by Bosch (model GLM50C, model GLM150C, etc.) and the laser distance measuring device manufactured by Leica Measurement System (Leica DISTO (registered trademark) D1, Leica DISTO (registered trademark) D810, Leica DISTO (registered trademark) X3, etc. are sold. Among the laser length measuring devices, there are also laser length measuring devices with a tilt measurement function that displays the tilt of the main body, which can be used as an indicator when correcting the irradiation direction, and therefore is preferred. In addition, not only portable models are sold, but also modular models such as laser distance sensors (LDS-7A, etc.) manufactured by Takenaka Electronics Industry Co., Ltd. that are assembled into PCs and devices are sold, and any of these models of length measuring devices can be applied to the present invention.

[0060] like Figure 1 (A) and Figure 1 As shown in (B), the measuring member 300 can have an adapter 301 for holding the length measuring device 100 and three or more (three in the figure) leg members 303 arranged on the contact surface 220 of the guide member 200. The three leg members 303 can be composed of, for example, a tripod. The leg members 303 each have a retractable structure and can adjust the length. All the top ends of the leg members 303 of the measuring member 300 can be arranged on the contact surface 220. Two of the three leg members 303 can be arranged on the contact surface 220 of one of the two guide members arranged in parallel, and the remaining leg member 303 can be arranged on the contact surface 220 of the other guide member 200. In addition, the measuring member 300 can have four or more leg members 303 arranged on the contact surface 220 of the guide member 200. The four leg members 303 can be composed of, for example, a quadrangular frame.

[0061] The adapter 301 may have an adjustment mechanism (not shown) that adjusts the orientation of the measuring direction D1 of the length measuring device 100. The adjustment mechanism has a free stage, a plurality of butterfly screw type fixing members, etc., and can freely adjust the measuring direction D1 of the length measuring device 100. The measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910 when all the leg members 303 are in contact with the contact surface 220 (when the measuring member 300 is arranged on the contact surface 220).

[0062] The measurement direction D1 of the length measuring device 100 is adjusted, for example, as follows. First, the measuring member 300 is arranged on the contact surface 220 of the guide member 200 so that all the top ends of the leg members 303 of the measuring member 300 are in contact with the contact surface 220. From the row ( Figure 1 In the straight line Lm) of (A), first, for any reaction tube 910, the spatial length is measured using a measuring instrument. Next, the fixing screw of the free stage is loosened to adjust the irradiation direction and angle of the laser of the length measuring device 100 in such a manner as to measure the spatial length. After the adjustment, the fixing screw of the free stage is tightened to fix the length measuring device 100. When measuring the distance to the tube wall, a shorter distance is displayed, so the angle of the length measuring device 100 is adjusted again. In addition, as a standard of adjustment, if the measurement value of the laser rangefinder is within the range of ±1% of the spatial length measured using a measuring instrument, it can be determined that the appropriate angle has been adjusted.

[0063] In fact, the distance measured by the length measuring device 100 is the distance from the top of the length measuring device 100 to the solid object 920. Figure 1 As shown in (A), according to the specific structure and shape of the length measuring device 100 and the measuring member 300, during measurement, since the top end of the length measuring device 100 is located above the upper end of the reaction tube 910 (on the horizontal plane of the opening 911), there is a case where a compensation operation of the length measurement result is required. In such a case, the compensation dimension between the top end of the length measuring device 100 and the upper end of the reaction tube 910 can be measured in advance and stored in the length measuring device 100 as correction data in advance. During measurement, the distance actually measured by the length measuring device 100 can be corrected based on the compensation dimension. In this way, the distance from the opening 911 of the reaction tube 910 to the solid object 920 can be measured.

[0064] As described above, the angle α formed by the straight line L1 parallel to the axial length direction D2 of the reaction tube 910 and the reference line L0 on the same plane N is constant for the plurality of reaction tubes 910 arranged along the reference line L0 (see Figure 3A ). Moreover, the measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910 when the measuring member 300 is arranged on the guide member 200. Therefore, even if the measuring member 300 is slid along the contact surface 220 of the guide member 200, the measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of any reaction tube 910 for measuring the spatial length. Therefore, when measuring the spatial lengths of different reaction tubes, the spatial lengths of multiple reaction tubes 910 can be measured without adjusting the angle of the length measuring device 100.

[0065] In addition, when the installation position of the guide member 200 is changed, it is necessary to perform the above-mentioned angle adjustment of the length measuring device 100 again. However, in general, the angle between the smooth surface 930 of the tube plate 916 on which the guide member 200 is placed and the axial length direction D2 of the reaction tube 910 is constant in most cases, so the adjustment operation of the measuring direction D1 of the length measuring device 100 is sufficient to perform fine adjustment in most cases.

[0066] By adjusting the angle of the length measuring device 100 as described above, the measuring direction D1 of the length measuring device 100 is oriented toward the axial length direction D2. Here, "oriented" means that the measuring direction D1 measured by the length measuring device 100, that is, the irradiation direction of the irradiation wave for distance measurement (such as the laser beam of the laser length measuring device 100, etc.) is downward and approximately parallel to the axial length direction D2.

[0067] In this specification, "the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910" should be understood as: not only including the situation of strict parallelism, but also including the situation where the measuring direction D1 of the length measuring device 100 deviates from the axial direction D2 of the reaction tube 910 by a small angle within the range that can measure the distance from the opening 911 to the solid object 920.

[0068] like Figure 2 As shown, first, the measuring member 300 slides to the position P1, and the length measuring device 100 can measure the distance (spatial length) from the opening 911 of the reaction tube 910 to the solid 920 at the position P1. Then, the measuring member 300 slides from the position P1 to the position P2, and the length measuring device 100 can measure the distance from the opening 911 of the reaction tube 910 to the solid 920 at the position P2. Then, the measuring member 300 slides from the position P2 to the position P3, and the length measuring device 100 can measure the distance from the opening 911 of the reaction tube 910 to the solid 920 at the position P3. In this way, the measuring member 300 can be arranged on the contact surface 220 of the guide member 200 so as to be able to slide sequentially from the position P1 (P2) where the distance of one reaction tube 910 is measured to the position P2 (P3) where the distance of another reaction tube 910 is measured.

[0069] The distance measuring device 10 may also include a mechanism for displaying whether the measured spatial length is within the permissible range. The display of the pass / fail status may be in the form of a display on a screen, or may include a mechanism for emitting sound as required.

[0070] The distance measuring device 10 may include a mechanism for transmitting the measurement result to a personal computer, a portable terminal, or the like using Bluetooth (registered trademark) or the like and integrating the data.

[0071] Refer again Figure 5, illustrating a reactor 900 including a plurality of reaction tubes 910 .

[0072] The reaction tube 910 can be assembled in a multi-tubular reactor 900 installed in a chemical plant in the field of petrochemical industry, for example. Thousands to tens of thousands of reaction tubes 910 can be assembled in one reactor 900. The reaction tube 910 can be filled with, for example, a granular catalyst, granular ceramics (for example, spheres, rings, etc. of silica, alumina or zirconia), granular metal Raschig rings, etc. A lower end opening 913 communicating with the outside of the reaction tube 910 can be formed at the lower end in the height direction of the reaction tube 910. The reaction tube 910 is also related to the intended contact reaction, and can be formed into a straight tube with an inner diameter of 10 mm to 60 mm and a height of 1000 mm to 15000 mm, for example.

[0073] The interior of the reaction tube 910 may be filled with only one solid substance, or may be filled with, for example, Figure 5 As shown, multiple layers 914 and 915 composed of different types of solids M1 and M2 are filled at different positions in the height direction of the reaction tube 910. When different types of solids are filled inside the reaction tube 910, the first layer 914 can be composed of granular solid M1. The second layer 915 can be composed of granular solid M2. For example, the solid M1 can use a catalyst for contact reaction that is spherical and has an outer diameter of 1 mm to 15 mm. For example, the solid M2 can use a metal Raschig ring that is formed into a ring shape (cylindrical). Although not shown in the figure, other layers can be formed inside the reaction tube 910 at a position closer to the lower end than the second layer 915 using granular solids of the same type or different type as the solid M1 or solid M2.

[0074] The types of the solid materials M1 and M2 are not limited to the types shown in the examples. In addition, the shapes and sizes of the solid materials M1 and M2 are not limited. In addition, the forms (number of layers, height of each layer, etc.) of the solid materials M1 and M2 filled in the reaction tube 910 are not limited.

[0075] <Distance Measurement Device 11 (Second Embodiment)>

[0076] Figure 6 is a perspective view schematically showing a distance measuring device 11 according to a second embodiment. Figure 7 It is along Figure 6 In addition, about the member common to the said embodiment, the same code|symbol is attached|subjected, and the description is abbreviate|omitted partially. Figure 6 Straight lines Lm1 and Lm2 indicated by two-dot chain lines in FIG. 1 represent a row of reaction tubes 910 for measuring the spatial length by sequentially moving two measuring members 305 and 306 . Figure 6 Reference numerals P1 , P2 , and P3 schematically indicate positions where the length of a space is measured using the length measuring device 100 .

[0077] The base member is not limited to being located near the tube plate 916 as in the first embodiment, and can be appropriately changed to be located above the tube plate 916. In this form, the space between the tube plate 916 and the base member can be used as a moving space for the measuring members 305 and 306.

[0078] like Figure 6 and Figure 7 As shown in FIG. 1 , the distance measuring device 11 of the second embodiment can include measuring members 305 and 306 that hold the length measuring device 100 and a guide member 202 (equivalent to a base member) that allows the measuring members 305 and 306 to be movable. The distance measuring device 11 can include a plurality of (two in the figure) measuring members 305 and 306, and can include a plurality of (two in the figure) length measuring devices 100. In the case of the second embodiment, as shown in FIG. Figure 6 As shown in the figure, two straight lines parallel to the direction in which the two measuring members 305 and 306 arranged on the guide member 202 move are set as reference lines L01 and L02. When looking down at the tube plate 916 from above, the reference lines L01 and L02 are parallel to the reference lines L01 and L02. Figure 6 The straight lines Lm1 and Lm2 marked in FIG. 1 are parallel to the lines Lm1 and Lm2 (the row of reaction tubes 910 for measuring the length of the space by moving the two measuring members 305 and 306 in sequence). Figure 3A As described in , the angle formed by the straight line L11 parallel to the axial direction D2 of the reaction tube 910 and the reference line L01 on the same plane is constant for the plurality of reaction tubes 910 arranged along the reference line L01. The angle formed by the straight line L12 parallel to the axial direction D2 of the reaction tube 910 and the reference line L02 on the same plane is constant for the plurality of reaction tubes 910 arranged along the reference line L02. The measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 when the measuring members 305 and 306 are arranged on the rail member 202. Furthermore, the measuring members 305 and 306 can be arranged on the rail member 202 so as to be movable in sequence from the position P1 (P2) at which the distance of one reaction tube 910 is measured to the position P2 (P3) at which the distance of another reaction tube 910 is measured.

[0079] like Figure 7As shown, the measuring members 305 and 306 can be arranged on the contact surfaces 222 and 223 of the guide member 202. The contact surfaces 222 and 223 of the guide member 202 can be set as smooth and continuous planes. In this case, the measuring members 305 and 306 can slide and move in a state where they are arranged on the contact surfaces 222 and 223 and the measuring direction D1 of the length measuring device 100 is kept parallel to the axial length direction D2 of the reaction tube 910. When the guide member 202 is viewed from above, the two contact surfaces 222 and 223 can be arranged in parallel. One measuring member 305 can be arranged on one contact surface 222, and the other measuring member 306 can be arranged on the other contact surface 223.

[0080] like Figure 7 As shown, the guide rail member 202 can be composed of a member having a guide rail shape in cross section. The guide rail member 202 of the second embodiment can be formed, for example, by a lower shell 203 and an upper shell 204 covered by the lower shell 203. In this case, the guide rail member 202 can have sliding grooves 205 and 206, and the sliding members 307 and 308 described later that the measuring members 305 and 306 have are embedded in the sliding grooves 205 and 206. The lower surfaces of the sliding grooves 205 and 206 become contact surfaces 222 and 223. The measuring members 305 and 306 can be suspended from the guide rail member 202 in a manner that the lower surfaces of the sliding members 307 and 308 contact the contact surfaces 222 and 223 of the sliding grooves 205 and 206.

[0081] The distance measuring device 11 may further include a support leg 401 that supports the guide member 202 and detachably mounts the guide member 202 on the tube plate 916. The guide member 202 may be disposed on the smooth surface 930 of the tube plate 916 by means of the support leg 401. The support leg 401 may not be disposed on the smooth surface 930 of the tube plate 916, as long as the guide member 202 is stably disposed without shaking.

[0082] The support legs 401 can position the guide rail member 202 above the tube sheet 916. The structure of the support legs 401 is not particularly limited as long as it does not hinder the movement of the measuring members 305 and 306. For example, the support legs 401 can be composed of a tripod or a quadripod (a tripod in the example shown). Each support leg 401 has a retractable structure and can adjust the height of the guide rail member 202 from the tube sheet 916. The space between the tube sheet 916 and the guide rail member 202 can be used as a moving space for the measuring members 305 and 306.

[0083] with Figure 3B (A) and Figure 3BAs described in (B), when the guide member 202 is installed in the reactor 900, the axial direction D2 of the reaction tube 910 may not be perpendicular to the contact surfaces 222, 223 of the guide member 202. Even in the case where the axial direction D2 of the reaction tube 910 is not perpendicular to the contact surfaces 222, 223 of the guide member 202, the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 when the measuring members 305, 306 are arranged on the guide member 202, and thus the distance (spatial length) from the opening 911 of the reaction tube 910 to the solid matter 920 can be measured.

[0084] The measuring members 305 and 306 may include adapters 310 and 311 for holding the length measuring device 100 and sliders 307 and 308 disposed on the contact surfaces 222 and 223 of the guide member 202. The sliders 307 and 308 may be provided on the upper portion of the adapters 310 and 311. By providing the sliders 307 and 308, the measuring members 305 and 306 can be smoothly slid along the guide member 202.

[0085] The adapters 310 and 311 may have an adjustment mechanism that adjusts the orientation of the measuring direction D1 of the length measuring device 100. The adjustment mechanism has a free pan head, a plurality of butterfly screw-type fixing parts, etc., similar to the adapter 301 of the first embodiment described above, and can freely adjust the measuring direction D1 of the length measuring device 100. The measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910 when the sliding members 307 and 308 are in contact with the contact surfaces 222 and 223 (when the measuring members 305 and 306 are arranged on the guide rail member 202). The measuring direction D1 of the length measuring device 100 can be adjusted using the same method as described in the first embodiment described above. Figure 6 and Figure 7 In the illustrated second embodiment, since two length measuring devices 100 are provided, the measuring directions D1 of the two length measuring devices 100 are adjusted.

[0086] In the second embodiment, the rail member 202 having two contact surfaces 222 and 223 is exemplified, but the rail member may be changed to a rail member having only one contact surface or a rail member having three or more contact surfaces.

[0087] <Distance Measurement Device 12 (Third Embodiment)>

[0088] Figure 8 is a perspective view schematically showing a distance measuring device 12 according to a third embodiment. Fig. 9 (A) is along Figure 8 The cross-sectional view of line 9A-9A, Fig. 9 (B) is an enlarged representation Fig. 9 9B is a cross-sectional view of a portion surrounded by a two-dot chain line in (A). Fig.10 It is along Figure 8 In addition, about the member common to the said embodiment, the same code|symbol is attached|subjected, and the description is abbreviate|omitted partially. Figure 8 Straight lines Lm1 , Lm2 , Lm3 , and Lm4 indicated by two-dot chain lines in the figure represent a row of reaction tubes 910 for which the measuring member 315 is sequentially moved to measure the spatial length using the plurality of length measuring devices 100 . Figure 8 The reference numerals P1 , P2 , and P3 shown schematically indicate positions where a length measuring device 100 is used to measure the length of a space.

[0089] The third embodiment is similar to the second embodiment in that the base member is located above the tube plate 916 , but is different from the second embodiment in the specific shapes of the base member and the measuring member.

[0090] like Figure 8 , Fig. 9 (A) Fig. 9 (B) and Fig.10 As shown, the distance measuring device 12 of the third embodiment can include a measuring member 315 for holding the length measuring device 100 in a hanging state and a guide member 207 (relative to the base member) for configuring the measuring member 315 to be movable. The measuring member 315 can include a plurality of (four in the figure) length measuring devices 100. The plurality of length measuring devices 100 can be arranged corresponding to the pitch pa of the reaction tube 910. In the case of the third embodiment, as shown in FIG. Figure 8 As shown in the figure, four straight lines parallel to the direction in which the measuring member 315 arranged on the guide member 207 moves are set as reference lines L01, L02, L03, and L04. When looking down at the tube plate 916 from above, the reference lines L01, L02, L03, and L04 are parallel to the direction in which the measuring member 315 arranged on the guide member 207 moves. Figure 8 The straight lines Lm1, Lm2, Lm3, and Lm4 marked in FIG. 1 are parallel to the lines Lm1, Lm2, Lm3, and Lm4 (rows of reaction tubes 910 for measuring the spatial length by the plurality of length measuring devices 100 by sequentially moving the measuring member 315). Figure 3AAs described in , the angle formed by the straight line L11 parallel to the axial direction D2 of the reaction tube 910 and the reference line L01 on the same plane is constant for the plurality of reaction tubes 910 arranged along the reference line L01. The angle formed by the straight line L12 parallel to the axial direction D2 of the reaction tube 910 and the reference line L02 on the same plane is constant for the plurality of reaction tubes 910 arranged along the reference line L02. The angle formed by the straight line L13 parallel to the axial direction D2 of the reaction tube 910 and the reference line L03 on the same plane is constant for the plurality of reaction tubes 910 arranged along the reference line L03. The angle formed by the straight line L14 parallel to the axial direction D2 of the reaction tube 910 and the reference line L04 on the same plane is constant for the plurality of reaction tubes 910 arranged along the reference line L04. The measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910 when the measuring member 315 is arranged on the guide member 207. In addition, the measuring member 315 can be arranged on the guide member 207 so as to be movable sequentially from the position P1 (P2) at which the distance of one reaction tube 910 is measured to the position P2 (P3) at which the distance of another reaction tube 910 is measured.

[0091] The measuring member 315 can slide and move in a state where it is arranged on the guide member 207 and the measuring direction D1 of the length measuring device 100 is kept parallel to the axial length direction D2 of the reaction tube 910. The distance measuring device 12 can have a plurality of guide members 207. When the tube plate 916 is viewed from above, a plurality of (for example, two) guide members 207 can be arranged in parallel.

[0092] like Fig. 9 (A) and Fig. 9 As shown in (B), the guide rail member 207 can be composed of a member having a guide rail shape in cross section. The guide rail member 207 of the third embodiment can be composed of, for example, a guide rail of a linear guide 236. In this case, a movable block 230 that is engaged with the guide rail member 207 and is provided in a sliding member 317 described later that is provided in the measuring member 315 and is provided with a linear guide 236. As is well known, the movable block 230 of the linear guide 236 has a bearing built in, and can slide and move straightly along the guide rail member 207 by utilizing the rolling motion of the bearing. The guide rail and the movable block in the linear guide are usually point contacts between the curved surface on the guide rail side and the spherical surface of the bearing. The measuring member 315 can be suspended from the guide rail member 207 in a manner that the movable block 230 of the sliding member 317 is engaged with the guide rail member 207.

[0093] The distance measuring device 12 may further include a support leg 406 that supports the guide member 207 and detachably mounts the guide member 207 on the tube plate 916. The guide member 207 may be disposed on the smooth surface 930 of the tube plate 916 by means of the support leg 406. The support leg 406 may not be disposed on the smooth surface 930 of the tube plate 916, as long as the guide member 207 is stably disposed without shaking.

[0094] The support legs 406 can position the guide rail member 207 above the tube sheet 916. The structure of the support legs 406 is not particularly limited as long as it does not hinder the movement of the measuring member 315. For example, angle bars can be used for the support legs 406. Each support leg 406 has a retractable structure, and the height of the guide rail member 207 from the tube sheet 916 can be adjusted. The space between the tube sheet 916 and the guide rail member 207 can be used as a moving space for the measuring member 315.

[0095] The support leg 406 can support the rail member 207 via the frame 231 provided with the rail member 207. The frame 231 can be formed of flat steel. In addition, the support leg 406 can directly support the rail member 207 without the frame 231, and can be installed on the tube plate 916 in a detachable manner.

[0096] The distance measuring device 12 can include a driving unit 232 that slides the measuring member 315 along the guide member 207. The structure of the driving unit 232 is not limited. Figure 8 , Fig. 9 (A) and Fig.10 As shown, the driving unit 232 can include: a ball screw 233 rotatably supported on the frame 231, a motor 234 that rotationally drives the ball screw 233, and a working plate 235 through which the ball screw 233 passes. The motor 234 can be mounted on the frame 231. The working plate 235 can be mounted on the sliding member 317 of the measuring member 315. The ball screw 233 can be fitted into the threaded hole of the working plate 235. In the case of the driving unit 232 having such a structure, when the start button is pressed and the ball screw 233 is rotationally driven by the motor 234, the working plate 235 moves along the axial direction of the ball screw 233 due to the ball screw 233 being fitted therein. As a result, the measuring member 315 can be moved along Figure 8 When the ball screw 233 is driven to rotate in the opposite direction by the motor 234, the measuring member 315 can move backward in the opposite direction.

[0097] The movable block 230 of the linear guide 236 that is engaged with the guide member 207 slides straightly. In the third embodiment in which the linear guide 236 is used as the guide member 207, for convenience of description, the upper surface of the movable block 230 is referred to as the sliding surface 225 of the guide member 207. Figure 3B (A) and Figure 3B As described in (B), when the guide member 207 is installed in the reactor 900, the axial direction D2 of the reaction tube 910 may not be perpendicular to the sliding surface 225 of the guide member 207. Even in the case where the axial direction D2 of the reaction tube 910 is not perpendicular to the sliding surface 225 of the guide member 207, since the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 when the measuring member 315 is arranged on the guide member 207, the distance (spatial length) from the opening 911 of the reaction tube 910 to the solid matter 920 can be measured.

[0098] The measuring member 315 can include an adapter 316 for holding the length measuring device 100 in a hanging state and a slider 317 disposed on the guide member 207. A plurality of (for example, four in the illustrated example) adapters 316 can be disposed on the lower surface of one slider 317. Since the slider 317 is provided, the measuring member 315 can slide and move smoothly along the guide member 207. The surface of the slider 317 holding the adapter 316 is parallel to the sliding surface 225 of the guide member 207.

[0099] The adapter 316 may have an adjustment mechanism that adjusts the orientation of the measuring direction D1 of the length measuring device 100. The adjustment mechanism has a free stage, a plurality of butterfly screw type fixings, etc., similar to the adapter 301 of the first embodiment described above, and can freely adjust the measuring direction D1 of the length measuring device 100. The measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910 when the measuring member 315 is arranged on the guide member 207. The adjustment of the measuring direction D1 of the length measuring device 100 can be performed by the same method as described in the first embodiment described above. Since the third embodiment has four length measuring devices 100, the measuring directions D1 of the four length measuring devices 100 are adjusted.

[0100] In the third embodiment, the case where four length measuring devices 100 are provided is exemplified, but one to three length measuring devices 100 or five or more length measuring devices 100 may be provided.

[0101] <Distance measurement device 13 (fourth embodiment)>

[0102] Fig.11 (A) shows the distance measuring device of the fourth embodiment. Fig. 9 (A) is a cross-sectional view corresponding to Fig.11 (B) is an enlarged representation Fig.11 11B is a cross-sectional view of a portion surrounded by a two-dot chain line in (A). In addition, the same reference numerals are attached to the same components as those in the above-mentioned embodiment, and the description thereof is partially omitted.

[0103] The fourth embodiment is different from the third embodiment in the specific shape of the base member, but is the same as the third embodiment in other aspects.

[0104] like Fig.11 (A) and Fig.11 As shown in (B) of FIG. 4 , the distance measurement device 13 of the fourth embodiment can include a measurement member 242 for holding the length measuring device 100 in a hanging state and a rail member 240 (corresponding to a base member) for movably arranging the measurement member 242 .

[0105] like Fig.11 (A) and Fig.11 As shown in (B), the guide rail member 240 can be composed of a member having a guide rail shape in cross section. The guide rail member 240 of the fourth embodiment can have a recessed portion 243 having a concave shape in cross section. In this case, the slider 246 of the measuring member 242 can be provided with a block 244 that fits into the recessed portion 243 of the guide rail member 240. The block 244 of the slider 246 is guided along the guide rail member 240 by the sliding motion between the convex portion 245 of the block 244 and the recessed portion 243 of the guide rail member 240. The bottom surface of the recessed portion 243 of the guide rail member 240 becomes the contact surface 241.

[0106] The distance measurement device 13 can include a driving unit 232 that slides the measuring member 242 along the rail member 240. The driving unit 232 can be configured similarly to the third embodiment.

[0107] <Distance Measurement Device 14 (Fifth Embodiment)>

[0108] Fig.12 1 is a perspective view schematically showing a distance measuring device 14 according to a fifth embodiment. In addition, the same reference numerals are given to the same components as those in the above-mentioned embodiment, and the description thereof will be partially omitted. Fig.12 A straight line Lm indicated by a two-dot chain line in FIG. 1 represents a row of reaction tubes 910 for measuring the spatial length by sequentially moving the measuring member 320 .

[0109] like Fig.12As shown, the measuring member 320 of the fifth embodiment can include an adapter 301 for holding the length measuring device 100 and a plate member 321 arranged on the contact surface 220 of the guide member 200. A pair of plate members 321 are connected to a top plate 322, and can form a substantially box shape. The adapter 301 is mounted on the top plate 322. The measuring member 320 can be arranged in a manner that the lower end surface of the plate member 321 is in surface contact with the contact surface 220. Since the plate member 321 is in surface contact, the measuring member 320 can be stably arranged on the contact surface 220.

[0110] <Distance measurement device 15 (sixth embodiment)>

[0111] Fig.13 The distance measuring device 15 according to the sixth embodiment is shown in FIG. Figure 1 (B) is a cross-sectional view corresponding to FIG. In addition, the same reference numerals are attached to the components common to the above-mentioned embodiment, and the description thereof is partially omitted.

[0112] like Fig.13 As shown in FIG. 1 , the measuring member 300 of the sixth embodiment can include a slider 325 disposed on the contact surface 220 of the guide rail member 200. The slider 325 can be connected to the top end of the leg member 303 via a ball joint 326. The slider 325 can be disposed on the contact surface 220 of the guide rail member 200 regardless of the posture of the leg member 303. Since the slider 325 is provided, the measuring member 300 can slide and move smoothly along the guide rail member 200.

[0113] <Distance Measurement Device 16 (Seventh Embodiment)>

[0114] Fig.14 The distance measuring device 16 according to the seventh embodiment is shown in FIG. Figure 2 In addition, about the member common to the above-mentioned embodiment, the same code|symbol is attached|subjected, and the description is abbreviate|omitted partially.

[0115] The base member is not limited to the case where it is mounted on the tube plate 916, and can be changed appropriately.

[0116] like Fig.14As shown, the distance measuring device 16 of the seventh embodiment can include a rail member 200 (equivalent to a base member) that allows the measuring member 300 to be movable. The distance measuring device 16 can also include a support leg 210 that supports the rail member 200 and mounts the rail member 200 on the tube plate 916 in a detachable manner. The support leg 210 can be mounted on the lower surface of the rail member 200. The support leg 210 of the seventh embodiment can have a tapered shape with a tapered tip at the lower end side. The tip of the support leg 210 can pass over the opening 911 of the reaction tube 910 and enter the interior of the reaction tube 910. The base end of the upper end side of the support leg 210 can have an outer diameter dimension larger than the inner diameter dimension of the opening 911 of the reaction tube 910. Thus, the rail member 200 is mounted on the reaction tube 910 with the support leg 210 inserted into the opening 911 of the reaction tube 910.

[0117] According to the seventh embodiment, even when the tube plate 916 does not have a location where the base member can be stably arranged, the guide rail member 200 as the base member can be laid. Figure 3B (A) and Figure 3B As described in (B) of FIG. 1 , the contact surface 220 of the guide member 200 laid in this way does not need to be perpendicular to the axial direction D2 of the reaction tube 910. Even when the axial direction D2 of the reaction tube 910 is not perpendicular to the contact surface 220, since the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 when the measuring member 300 is arranged on the contact surface 220, the distance (spatial length) from the opening 911 of the reaction tube 910 to the solid matter 920 can be measured.

[0118] <Distance Measurement Device 17 (Eighth Embodiment)>

[0119] Fig.15 The distance measuring device 17 according to the eighth embodiment is shown in FIG. Figure 2 In addition, about the member common to the above-mentioned embodiment, the same code|symbol is attached|subjected, and the description is abbreviate|omitted partially. Fig.15 Reference numerals P1 , P2 , and P3 schematically indicate positions where the length of a space is measured using the length measuring device 100 .

[0120] The base member is not limited to the one having a rail shape, but can be modified as appropriate. Furthermore, the measuring member is not limited to the one moved manually by the measurer, but can be modified as appropriate.

[0121] like Fig.15As shown, the distance measuring device 17 of the eighth embodiment can include a measuring member 330 holding the length measuring device 100 and a plate member 215 (equivalent to a base member) that configures the measuring member 330 to be movable. The measuring member 330 of the eighth embodiment can include a traveling carriage 333 that is configured on the plate member 215 and can automatically travel. The measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910 when the traveling carriage 333 is configured on the plate member 215. Moreover, the traveling carriage 333 can be configured on the plate member 215 so as to be able to move sequentially from the position P1 (P2) at which the distance of one reaction tube 910 is measured to the position P2 (P3) at which the distance of another reaction tube 910 is measured.

[0122] The contact surface 227 of the plate member 215 can be a smooth and continuous plane. The traveling carriage 333 can slide while being arranged on the plate member 215 and keeping the measuring direction D1 of the length measuring device 100 parallel to the axial direction D2 of the reaction tube 910 .

[0123] The plate member 215 can be formed of a member having a plate shape. The plate member 215 can be formed of a porous plate having a plurality of through holes 217 formed therein. The through holes 217 can have a size substantially the same as that of the opening 911, or a size slightly wider than that of the opening 911. The plurality of through holes 217 can be formed corresponding to the pitch pa of the reaction tube 910. The plate member 215 can be mounted on the reactor 900 in a manner such that the through holes 217 and the opening 911 substantially overlap.

[0124] The distance measuring device 17 can also include a support leg 201 that supports the plate member 215 and mounts the plate member 215 on the tube plate 916 in a detachable manner. The support leg 201 can be mounted on the lower surface of the plate member 215. The plate member 215 can be arranged on the smooth surface 930 of the tube plate 916 with the support leg 201. The support leg 201 may not be arranged on the smooth surface 930 of the tube plate 916, as long as the plate member 215 is stably arranged without shaking. The plate member 215 can be fixed to the outer peripheral wall of the reactor 900, the reaction tube 910, etc. by a clamping jig (not shown) after adjusting the mounting position.

[0125] As in Figure 3B (A) and Figure 3BAs described in (B), when the plate member 215 is mounted on the reactor 900, the axial direction D2 of the reaction tube 910 may not be perpendicular to the contact surface 227. Even when the axial direction D2 of the reaction tube 910 is not perpendicular to the contact surface 227, since the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 when the traveling carriage 333 is arranged on the plate member 215, the distance (spatial length) from the opening 911 of the reaction tube 910 to the solid matter 920 can be measured.

[0126] The traveling carriage 333 has an adapter 331 for holding the length measuring device 100, and can automatically travel on the contact surface 227 of the plate member 215. The traveling carriage 333 can have wheels that are driven to rotate by a motor or the like, a controller that controls the driving of the motor and the measuring operation of the length measuring device 100, a memory that stores control programs and data, a battery, and the like. The traveling carriage 333 can be connected to an external personal computer, a portable terminal, or the like using Bluetooth (registered trademark) or the like, and can send and receive data and control signals between the external devices. The traveling carriage 333 can be guided by a guide plate such as an optical reflector or a magnetic tape attached to the contact surface 227 of the plate member 215. The traveling carriage 333 can have a sensor 332 such as an optical sensor or a magnetic sensor that detects the guide plate. The traveling carriage 333 can travel along a predetermined route and stop at a predetermined position. The length measuring device 100 can irradiate the interior of the reaction tube 910 with laser light through the through hole 217 of the plate member 215. The travel carriage 333 can measure the spatial length of the reaction tube 910 using the length measuring device 100 at the stopped position. The through holes 217 of the plate member 215 can be formed corresponding to the respective reaction tubes 910. Based on the position where the travel carriage 333 stops, it can be determined which reaction tube 910 on the design data is the reaction tube 910 at the position. The measured value of the spatial length can be stored in association with the serial number of the reaction tube 910 on the design data.

[0127] The traveling trolley 333 is not limited to the case where it automatically travels on the route determined by the guided travel. The traveling trolley 333 can automatically travel on an amorphous route by autonomous travel. The traveling trolley 333 can have a sensor for measuring the travel distance, a gyro sensor for detecting the direction of travel, a sensor for detecting the through hole 217, etc., so as to carry out autonomous travel.

[0128] The traveling carriage 333 of the eighth embodiment can also be applied to the distance measuring device 10 of the first embodiment, the distance measuring device 16 of the seventh embodiment, etc. In this case, the traveling carriage 333 can automatically travel on the contact surface 220 of the rail member 200 .

[0129] In the distance measurement of the eighth embodiment, for the reaction tube 910 for which the travel carriage 333 is automatically moved to measure the spatial length, the measurer does not need to repeatedly perform the adjustment operation of making the measurement direction D1 measured by the length measuring device 100 parallel to the axial length direction D2 of the reaction tube 910. Therefore, the travel carriage 333 can be moved sequentially along the smooth contact surface 227, and the distance from the opening 911 of the reaction tube 910 to the solid matter 920 can be measured simply and quickly in a non-contact manner. In addition, since the travel carriage 333 automatically moves to measure the spatial length of the reaction tube 910, data collection is easier.

[0130] In the distance measuring device of the present invention as described above, the method for slidingly moving the measuring member is not particularly limited, and the measuring member can be moved manually or by installing another driving device and operating and stopping the driving device by remote operation.

[0131] <Distance Measurement Method of Distance Measurement Device 10 (First Embodiment)>

[0132] Next, a method of measuring the distance from the opening 911 of the reaction tube 910 to the solid matter 920 in a non-contact manner using the distance measurement device 10 of the first embodiment described above will be described.

[0133] The distance measuring method of the present invention is a distance measuring method as follows: in a reactor formed by joining a plurality of reaction tubes arranged in parallel to each other to a tube plate, the distance from an opening formed at an end in the axial direction of the reaction tube to a catalyst and / or a granular solid of an inactive substance filled in the interior of the reaction tube is measured in a non-contact manner for at least a portion of the reaction tubes among the plurality of reaction tubes, and the method is as follows: a measuring member holding a length measuring device is movably arranged on a base member, a straight line parallel to the direction in which the measuring member arranged on the base member moves is set as a reference line, an angle formed by the straight line parallel to the axial direction of the reaction tube and the reference line on the same plane is constant for the plurality of reaction tubes arranged along the reference line, the measuring direction of the length measuring device is parallel to the axial direction of the reaction tube when the measuring member is arranged on the base member, the measuring member is moved sequentially from a position where the distance of one reaction tube is measured to a position where the distance of another reaction tube is measured, and the distances are measured sequentially.

[0134] That is, one of the distance measurement methods of the present invention is a distance measurement method as follows: in a reactor in which a plurality of reaction tubes arranged parallel to each other are joined to a tube plate, for at least a portion of the plurality of reaction tubes, the distance (spatial length) from an opening formed at the end of the reaction tube in the axial direction to a granular solid of a catalyst and / or an inactive substance filled inside the reaction tube is measured in a non-contact manner, and is a method as follows: using the distance measurement device 10 of the first embodiment of the present invention, the distance is measured in a non-contact manner using a length measuring device 100.

[0135] Regarding the distance measurement method using the distance measurement device 10 of the first embodiment, Figure 1 (A) and Figure 2 As shown in the figure, first, the guide member 200 (equivalent to the base member) is arranged on the tube plate 916 via the support legs 201. The contact surface 220 of the guide member 200 can be set as a smooth and continuous plane. The measuring member 300 holding the length measuring device 100 is arranged on the contact surface 220 in such a manner that the measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910. In addition, at this time, it is preferable to perform the above-mentioned correction based on the compensation dimension in advance on the length measuring device 100 as needed.

[0136] Then, if Figure 2 As shown, the measurer slides the measuring member 300 to the position P1, and at the position P1, the distance from the opening 911 of the reaction tube 910 to the solid object 920 is measured using the length measuring device 100. Then, the measurer slides the measuring member 300 from the position P1 to the position P2, and at the position P2, the distance from the opening 911 of the reaction tube 910 to the solid object 920 is measured using the length measuring device 100. Then, the measurer slides the measuring member 300 from the position P2 to the position P3, and at the position P3, the distance from the opening 911 of the reaction tube 910 to the solid object 920 is measured using the length measuring device 100. In this way, the measuring member 300 is sequentially slid from the position P1 (P2) at which the spatial length of one reaction tube 910 is measured to the position P2 (P3) at which the spatial length of another reaction tube 910 is measured, and the spatial lengths are measured sequentially.

[0137] In addition, when measuring the distance from the opening 911 to the solid 920 of one reaction tube 910, for example, the measurement may be performed at only one position for the position P1, that is, the measurement may be performed at only one point for one reaction tube 910, and the data may be used as the measurement result. Alternatively, the measurement may be performed at multiple positions while the measuring member is slightly slid from the position P1 within the range of the opening 911, and the arithmetic mean of these data may be obtained as the measurement result. It is preferable to use the result based on the data measured at multiple positions for the distance from the opening 911 to the solid 920 of one reaction tube 910, because the measurement error is small.

[0138] The angle α formed by the straight line L1 parallel to the axial length direction D2 of the reaction tube 910 and the straight line L0 parallel to the moving direction of the measuring member 300 disposed on the guide member 200, i.e., the reference line L0, on the same plane N is constant for the plurality of reaction tubes 910 arranged along the reference line L0 (see Figure 3A ). Moreover, the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 when the measuring member 300 is arranged on the guide member 200. Therefore, even if the measuring member 300 is slid along the guide member 200, the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of any reaction tube 910 for measuring the spatial length. Therefore, by sliding the measuring member 300 along the guide member 200, the spatial lengths of multiple reaction tubes 910 can be measured in sequence. For the row of reaction tubes 910 for which the spatial length is measured by sliding the measuring member 300 ( Figure 1 The measuring person does not need to repeatedly perform the adjustment operation of making the measuring direction D1 measured by the length measuring device 100 parallel to the axial length direction D2 of the reaction tube 910. Therefore, the measuring member 300 can be sequentially moved along the guide member 200, and the distance from the opening 911 of the reaction tube 910 to the solid matter 920 can be measured simply and quickly in a non-contact manner.

[0139] By shortening the measurement time of the filling height of the filler, the duration of the filling / replacing operation of the filler can be shortened, the cost incurred by the operation can be reduced, and the operation rate of the equipment can be improved. In addition, the deviation of the filling height of the catalyst etc. filled in the reaction tube 910 of the multi-tubular reactor 900 can be effectively suppressed, so that the contact reaction can be carried out in a better state.

[0140] In the measurement method of the present invention, not only the distance measurement device 10 of the first embodiment but also the distance measurement device 10 of the fifth embodiment ( Fig.12 )、Sixth Implementation Method ( Fig.13 )、Seventh Implementation Method ( Fig.14 ) and the eighth embodiment ( Fig.15 ) distance measuring devices 14, 15, 16, 17.

[0141] <Distance Measurement Method of Distance Measurement Device 11 (Second Embodiment)>

[0142] Next, a method of measuring the distance from the opening 911 of the reaction tube 910 to the solid matter 920 in a non-contact manner using the distance measurement device 11 of the second embodiment described above will be described.

[0143] That is, one of the distance measurement methods of the present invention is a distance measurement method as follows: in a reactor in which a plurality of reaction tubes arranged parallel to each other are joined to a tube plate, for at least a portion of the plurality of reaction tubes, the distance (spatial length) from an opening formed at the end of the reaction tube in the axial direction to a granular solid of a catalyst and / or an inactive substance filled inside the reaction tube is measured in a non-contact manner, and the method is as follows: the distance is measured in a non-contact manner using a length measuring device 100 using the distance measuring device 11 of the second embodiment of the present invention.

[0144] In the distance measurement method of the second embodiment, as Figure 6 and Figure 7 As shown, first, the guide member 202 (equivalent to the base member) is arranged on the tube plate 916 via the support legs 401. The contact surfaces 222 and 223 of the guide member 202 can be set as smooth and continuous planes. The support legs 401 can position the guide member 202 above the tube plate 916. The measuring members 305 and 306 holding the length measuring device 100 are arranged on the guide member 202 in such a manner that the sliders 307 and 308 are in contact with the contact surfaces 222 and 223 and the measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910.

[0145] Then, if Figure 6 As shown, the measurer slides the measuring members 305 and 306 toward the position P1, and at the position P1, the spatial length of the reaction tube 910 is measured using the length measuring device 100. Then, the measurer slides the measuring members 305 and 306 from the position P1 toward the position P2, and at the position P2, the spatial length of the reaction tube 910 is measured using the length measuring device 100. Then, the measurer slides the measuring members 305 and 306 from the position P2 toward the position P3, and at the position P3, the spatial length of the reaction tube 910 is measured using the length measuring device 100. In this way, the measuring members 305 and 306 are sequentially slid from the position P1 (P2) at which the spatial length of one reaction tube 910 is measured to the position P2 (P3) at which the spatial length of another reaction tube 910 is measured, and the spatial lengths are sequentially measured.

[0146] Next, the measurer sequentially slides the other measuring members 305 and 306 from the position P1 (P2) at which the spatial length of one reaction tube 910 is measured to the position P2 (P3) at which the spatial length of another reaction tube 910 is measured, similarly to the above steps, and sequentially measures the spatial length. In addition, as described above, it is also possible to measure at multiple points on one reaction tube 910 while shifting the measurement position by a small amount each time.

[0147] The angle formed on the same plane by the straight lines L11 and L12 parallel to the axial direction D2 of the reaction tube 910 and the reference lines L01 and L02 parallel to the direction in which the measuring members 305 and 306 arranged on the rail member 202 move is constant for the plurality of reaction tubes 910 arranged along the reference lines L01 and L02. Furthermore, the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 when the measuring members 305 and 306 are arranged on the rail member 202. Therefore, even if the measuring members 305 and 306 are slid along the rail member 202, the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of any reaction tube 910 for measuring the spatial length. Therefore, by sliding the measuring members 305 and 306 along the rail member 202, the spatial lengths of the plurality of reaction tubes 910 can be measured sequentially. The row of reaction tubes 910 ( Figure 6 The measuring person does not need to repeatedly perform the adjustment operation of making the measuring direction D1 measured by the length measuring device 100 parallel to the axial length direction D2 of the reaction tube 910. Therefore, the measuring members 305 and 306 can be sequentially moved along the guide member 202, and the distance from the opening 911 of the reaction tube 910 to the solid matter 920 can be measured simply and quickly in a non-contact manner.

[0148] <Distance Measurement Method of Distance Measurement Device 12 (Third Embodiment)>

[0149] Next, a method of measuring the distance from the opening 911 of the reaction tube 910 to the solid matter 920 in a non-contact manner using the distance measurement device 12 of the third embodiment described above will be described.

[0150] That is, one of the distance measurement methods of the present invention is a distance measurement method as follows: in a reactor in which a plurality of reaction tubes arranged parallel to each other are joined to a tube plate, for at least a portion of the plurality of reaction tubes, the distance (spatial length) from an opening formed at the end of the reaction tube in the axial direction to a granular solid of a catalyst and / or an inactive substance filled inside the reaction tube is measured in a non-contact manner, and is a method as follows: the distance is measured in a non-contact manner using a length measuring device 100 using the distance measuring device 12 of the third embodiment of the present invention.

[0151] Regarding the distance measurement method of the third embodiment, Figure 8 As shown, first, the guide member 207 (equivalent to the base member) is arranged on the tube plate 916 via the support legs 406. The support legs 406 can position the guide member 207 above the tube plate 916. The measuring member 315 holding the length measuring device 100 is arranged on the guide member 207 in such a manner that the movable block 230 of the slider 317 is engaged with the guide member 207 and the measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of the reaction tube 910.

[0152] Then, if Figure 8 As shown, the measurer slides the measuring member 315 to the position P1, and at the position P1, the spatial lengths of the four reaction tubes 910 are measured using the four length measuring devices 100. Then, the measurer slides the measuring member 315 from the position P1 to the position P2, and at the position P2, the spatial lengths of the four reaction tubes 910 are measured using the four length measuring devices 100. Then, the measurer slides the measuring member 315 from the position P2 to the position P3, and at the position P3, the spatial lengths of the four reaction tubes 910 are measured using the four length measuring devices 100. In this way, the measuring member 315 is sequentially slid from the position P1 (P2) at which the spatial length of one reaction tube 910 is measured to the position P2 (P3) at which the distance of another reaction tube 910 is measured, and the spatial lengths are sequentially measured. In addition, as described above, it is also possible to measure at multiple points on one reaction tube 910 while shifting the measurement position a little at a time.

[0153] The angles formed on the same plane by the straight lines L11, L12, L13, L14 parallel to the axial direction D2 of the reaction tube 910 and the straight lines L01, L02, L03, L04 parallel to the direction in which the measuring member 315 arranged on the guide member 207 moves are constant for the multiple reaction tubes 910 arranged along the reference lines L01, L02, L03, L04. Moreover, the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 when the measuring member 315 is arranged on the guide member 207. Therefore, even if the measuring member 315 is slid along the guide member 207, the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of any reaction tube 910 for measuring the spatial length. Therefore, the spatial lengths of multiple reaction tubes 910 can be measured. For the row ( Figure 8 The measuring person does not need to repeatedly perform the adjustment operation of making the measuring direction D1 measured by the length measuring device 100 parallel to the axial length direction D2 of the reaction tube 910. Therefore, the measuring member 315 can be sequentially moved along the guide member 207, and the distance from the opening 911 of the reaction tube 910 to the solid matter 920 can be measured simply and quickly in a non-contact manner.

[0154] In the measurement method of the present invention, not only the distance measuring device 12 of the third embodiment can be used, but also the distance measuring device 12 of the fourth embodiment ( Fig.11 (A) and Fig.11 (B)) distance measuring device 13.

[0155] <Reference example 1 of distance measurement method>

[0156] Next, as Reference Example 1 of the distance measurement method, a method of measuring the distance from the opening 911 of the reaction tube 910 to the solid matter 920 in a non-contact manner when the tube plate 916 has a continuous smooth surface 930 will be described.

[0157] Fig.16 1 is a perspective view schematically showing a state in which reference example 1 of the distance measurement method is realized. In addition, the same reference numerals are attached to the same components as those of the above-mentioned embodiment, and the description thereof is partially omitted.

[0158] like Figure 4 (A) and Figure 4As shown in (B), the tube sheet surface has unevenness due to welding marks such as weld bead and sputtering, and there is an uneven portion. However, since the welding marks are concentrated on the outer periphery of the reaction tube 910, there is no welding mark in the middle between one reaction tube 910 and another adjacent reaction tube 910, and there is a case where the tube sheet 916 has an uninterrupted and continuous smooth surface 930. In such a case, the angle between the smooth surface 930 of the tube sheet 916 and the axial length direction D2 of the reaction tube 910 is usually constant, so the measuring member 300 can slide and move while in contact with the smooth surface 930 on the tube sheet 916.

[0159] The measuring member 300 can be formed in the same manner as the measuring member 300 of the first embodiment described above. The measuring member 300 can have an adapter 301 for holding the length measuring device 100 and three or more (three in the figure) leg members 303 arranged on the smooth surface 930 of the tube plate 916. The three leg members 303 can be composed of, for example, a tripod. The leg members 303 each have a structure that is retractable and can adjust the length. The measuring member 300 can be arranged on the tube plate 916 in a manner such that the top end of the leg member 303 contacts the smooth surface 930. The adapter 301 for holding the length measuring device 100 can be connected to only one or more of them on one tripod. By making it possible to hold multiple length measuring devices 100 on the leg member 303 (tripod), the spatial lengths of multiple reaction tubes 910 can be measured simultaneously.

[0160] For reference example 1 of the distance measurement method, Fig.16 As shown, first, the measuring member 300 holding the length measuring device 100 is arranged on the tube plate 916 in contact with the smooth surface 930 of the tube plate 916 and in a manner such that the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 .

[0161] Next, the measurer sequentially slides the measuring member 300 while it is in contact with the smooth surface 930 of the tube plate 916 to sequentially measure the space length.

[0162] The plurality of reaction tubes 910 are parallel to each other. Therefore, when the tube sheet 916 has a continuous smooth surface 930, even if the measuring member 300 is slid along the smooth surface 930 of the tube sheet 916, the measuring direction D1 of the length measuring device 100 is parallel to the axial length direction D2 of any reaction tube 910 for measuring the spatial length. Therefore, in such a case, by sliding the measuring member 300 along the smooth surface 930 of the tube sheet 916, the spatial lengths of the plurality of reaction tubes 910 can be measured sequentially. The measurer does not need to repeatedly perform the adjustment operation of making the measuring direction D1 measured by the length measuring device 100 parallel to the axial length direction D2 of the reaction tube 910. Therefore, by sequentially moving the measuring member 300 along the smooth surface 930 of the tube sheet 916 and re-arranging it at an appropriate position, the distance from the opening 911 of the plurality of reaction tubes 910 to the solid matter 920 can be measured simply and quickly in a non-contact manner.

[0163] <Reference example 2 of distance measurement method>

[0164] Next, as Reference Example 2 of the distance measurement method, a method of measuring the distance from the opening 911 of the reaction tube 910 to the solid matter 920 in a non-contact manner when the tube plate 916 has a discontinuous smooth surface 930 will be described.

[0165] Fig.17 This is a diagram schematically showing how Reference Example 2 of the distance measurement method is implemented. Fig.18 (A) is a cross-sectional view showing a tube sheet 916 to which a plurality of reaction tubes 910 are joined. Fig.18 (B) indicates the tube sheet 916 Fig.18 (A) is a top view of the embodiment. In addition, the same reference numerals are attached to the common components with the above-mentioned embodiment and reference example 1 of the distance measurement method, and the description thereof is partially omitted.

[0166] like Fig.18 (A) and Fig.18As shown in (B), the tube sheet surface is uneven due to welding marks such as weld beads and sputtering, resulting in an uneven portion. Depending on the pitch pb of the reaction tubes 910, the smooth surface 930 of the tube sheet 916 is surrounded by convex portions 931 and is regularly or irregularly discontinuous. Generally, the angle between the smooth surface 930 of the tube sheet 916 and the axial length direction D2 of the reaction tube 910 is constant, but in this case, since the smooth surface 930 is discontinuous, it is impossible to slide the measuring member 300 along the smooth surface 930 of the tube sheet 916 in sequence as in Reference Example 1 of the distance measurement method. Therefore, the measuring member 300 moves in a state separated from the tube sheet 916, that is, in a lifted state. The convex portion 931 is, for example, a weld bead when the reaction tube 910 is welded to the tube sheet 916. When the relative position of the smooth surface 930 surrounded by the convex portion 931 is almost not offset, by lifting and moving the measuring member 300, the distance from the opening 911 to the solid matter 920 of multiple reaction tubes 910 can be measured in sequence without adjusting the position and length of the leg member 303 each time.

[0167] For reference example 2 of the distance measurement method, Fig.17 As shown, first, the measuring member 300 holding the length measuring device 100 is arranged on the tube plate 916 in such a manner that it contacts the smooth surface 930 surrounded by the convex parts 931 and the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the reaction tube 910 .

[0168] Next, the measurer sequentially moves the measuring member 300 in a state of being separated from the smooth surface 930 of the tube plate 916 , and places the measuring member 300 on the tube plate 916 in contact with another smooth surface 930 , thereby sequentially measuring the space length.

[0169] Normally, the angle between the smooth surface 930 of the tube sheet 916 and the axial direction D2 of the reaction tube 910 is constant, and the plurality of reaction tubes 910 are parallel to each other. Therefore, in a state where the relative position of the smooth surface 930 surrounded by the convex portion 931 is almost not offset, even if the measuring member 300 is lifted and moved from the smooth surface 930 of the tube sheet 916, the measuring member 300 can be arranged at an appropriate position. In addition, in this case, since the measuring direction D1 of the length measuring device 100 is parallel to the axial direction D2 of the plurality of reaction tubes 910, the measurer does not need to repeatedly perform the adjustment operation to make the measuring direction D1 measured by the length measuring device 100 parallel to the axial direction D2 of the reaction tube 910. Therefore, the measuring member 300 can be moved sequentially along the smooth surface 930 of the tube sheet 916, and the distance from the opening 911 of the reaction tube 910 to the solid matter 920 can be measured simply and quickly in a non-contact manner. In addition, one or more adapters 301 for holding the length measuring device 100 may be connected to one tripod. By making it possible to hold a plurality of length measuring devices 100 on the leg member 303 (tripod), the spatial lengths of a plurality of reaction tubes 910 can be measured simultaneously.

[0170] As mentioned above, the distance measurement device and the distance measurement method of the present invention have been described by using various embodiments and modified examples. However, the present invention is not limited to the contents described in the specification, and can be modified appropriately based on the description of the claims.

[0171] For example, in the first embodiment ( Figure 1 (A) Figure 2 )、Second embodiment ( Figure 7 )、Third Implementation Method ( Figure 8 , Fig. 9 (A)), the fourth embodiment ( Fig.11 (A)), the fifth embodiment ( Fig.12 )、Sixth Implementation Method ( Fig.13 )、Seventh Implementation Method ( Fig.14 ) and reference example 1 of the distance measurement method ( Fig.16 ), the measuring member may have a rotatable roller, caster, etc. at the end in contact with the contact surface. This enables the measuring member to move more smoothly on the contact surface.

[0172] Description of Reference Numerals

[0173] 10, 11, 12, 13, 14, 15, 16, 17, distance measuring device; 100, length measuring device; 200, guide rail member (base member); 201, supporting leg; 202, guide rail member (base member); 203, lower shell; 204, upper shell; 205, 206, sliding groove; 207, guide rail member (base member); 210, supporting leg; 215, plate member (base member); 217, through hole; 220, contact surface; 221, guide groove; 222, 223, contact surface; 225, sliding surface; 227, contact surface; 230, movable block; 231, frame; 232, driving unit; 233, ball screw; 234, motor ; 235, working plate; 236, linear guide; 240, guide rail member; 241, contact surface; 242, measuring member; 243, recess; 244, block; 245, convex portion; 246, slide; 300, measuring member; 301, adapter; 303, leg member; 305, 306, measuring member; 307, 308, slide; 310, 311, adapter; 315, measuring member; 316, adapter; 317, slide; 320, measuring member; 321, plate member; 322, top plate; 325, slide; 326, ball joint; 330, measuring member; 331, adapter; 332, sensor; 333, travel trolley ; 341, base member; 341a, contact surface; 342, measuring member; 342a, contact surface; 343, base member; 343a, contact surface; 344, measuring member; 344a, contact surface; 345, base member; 345a, contact surface; 346, measuring member; 346a, contact surface; 347, base member; 347a, contact surface; 348, measuring member; 348a, contact surface; 401, support leg; 406, support leg; 900, reactor; 910, reaction tube; 911, opening; 913, lower end opening; 914, first layer; 915, second layer; 916, tube sheet; 920, solid matter; 930, smooth surface ; 931, convex part; D1, measuring direction; D2, axial direction; L0, L01, L02, L03, L04, reference line (a straight line parallel to the direction in which the measuring member arranged on the base member moves); L1, L11, L12, L13, L14, a straight line parallel to the axial direction of the reaction tube; Lm, Lm1, Lm2, Lm3, Lm4, a row of reaction tubes for measuring the spatial length by sequentially moving the measuring member; M1, solid; M2, solid; N, plane; P1, P2, P3, a position for measuring the spatial length using a length gauge; pa, pb, spacing; α, an angle formed by a straight line parallel to the axial direction of the reaction tube and the reference line on the same plane.

Claims

1. A distance measuring device for measuring, in a reactor in which a plurality of reaction tubes arranged in parallel are joined to a tube sheet, the distance from an opening formed at an end of the reaction tube in the axial length direction to a catalyst and / or a granular solid of an inactive substance filled in the reaction tube in a non-contact manner for at least a portion of the reaction tubes, wherein: The distance measuring device has: a measuring member holding a length measuring device; at least one base member that configures the measuring member to be movable; and Support legs support the base member and mount the base member on the tube sheet in a detachable manner, The top end of the lower end side of the support leg passes over the opening of the reaction tube and enters the interior of the reaction tube, the base end of the upper end side of the support leg has an outer diameter larger than the inner diameter of the opening of the reaction tube, and the base member is mounted on the reaction tube by means of the support leg inserted into the opening of the reaction tube. A straight line parallel to the direction in which the measuring member disposed on the base member moves is set as a reference line, and an angle formed by a straight line parallel to the axial length direction of the reaction tube and the reference line on the same plane is constant for a plurality of the reaction tubes arranged along the reference line. The measuring direction of the length measuring device is parallel to the axial direction of the reaction tube when the measuring member is arranged on the base member. The measuring member is disposed on the base member so as to be sequentially movable from a position where the distance of one of the reaction tubes is measured to a position where the distance of another of the reaction tubes is measured.

2. The distance measuring device according to claim 1, wherein: The measuring member is capable of sliding movement.

3. The distance measuring device according to claim 1 or 2, wherein: The base member has a rail shape or a plate shape.

4. The distance measuring device according to claim 1, wherein: The measuring member has three or more leg members arranged on the base member.

5. The distance measuring device according to claim 1, wherein: The measuring member includes a plate member disposed on the base member.

6. The distance measuring device according to claim 1, wherein: The measuring member includes a slide member disposed on the base member.

7. The distance measuring device according to claim 1, wherein: The measuring member includes a traveling carriage which is arranged on the base member and can travel automatically.

8. A distance measurement method, in a reactor in which a plurality of reaction tubes arranged in parallel are joined to a tube sheet, for at least a portion of the plurality of reaction tubes, the distance from an opening formed at an end portion of the reaction tube in the axial length direction to a catalyst and / or a granular solid of an inactive substance filled in the reaction tube is measured in a non-contact manner, wherein: The measuring member holding the length measuring device is movably arranged on the base member. A straight line parallel to the direction in which the measuring member disposed on the base member moves is set as a reference line, and an angle formed by a straight line parallel to the axial length direction of the reaction tube and the reference line on the same plane is constant for a plurality of the reaction tubes arranged along the reference line. The measuring direction of the length measuring device is parallel to the axial direction of the reaction tube when the measuring member is arranged on the base member. The measuring member is sequentially moved from a position where the distance of one of the reaction tubes is measured to a position where the distance of another of the reaction tubes is measured, thereby sequentially measuring the distances.

Images