JP4171620B2 - Fluid distribution device and manufacturing method thereof, air temperature type liquefied gas vaporizer and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluid circulation device and a method for manufacturing the same, an air temperature type liquefied gas vaporizer and a method for producing the same, and a ruler used for manufacturing the fluid flow device and the air temperature type liquefied gas vaporizer.
[0002]
In this specification, the upper and lower sides and the left and right sides of each drawing excluding FIG. In addition, the lower side of FIG.
[0003]
[Prior art]
For example, natural gas, oxygen, nitrogen, argon, helium, hydrogen, carbon dioxide, methane, propane, ethylene, and other gases are stored in a liquefied state in order to reduce the capacity of the tank during transportation and storage. And it is regasified and used by an air temperature type liquefied gas vaporizer according to demand.
[0004]
Conventionally, as such an air temperature type liquefied gas vaporizer, an evaporation unit and a heating unit are provided, and the evaporation unit includes a pair of manifold pipes arranged in parallel with each other in the vertical direction, An evaporation unit comprising a plurality of finned pipes arranged at intervals in the lengthwise direction of the manifold pipes between the two manifold pipes and having upper and lower ends welded to the two manifold pipes respectively. The liquefied gas that flowed from one end into the lower manifold pipe is divided into all finned pipes and then flows into the upper manifold pipe through the finned pipes. However, it flows out from the upper manifold tube to the heating section (see, for example, JP 2000-39099 A).
[0005]
Such an air temperature type liquefied gas vaporizer is manufactured as follows. That is, first, the same number of circular through holes as the finned tubes are formed on the peripheral walls of the upper and lower manifold tubes at intervals in the length direction, and the upper and lower end surfaces of the finned tube are It is processed into a concave partial cylindrical shape that is equal to the curvature of the outer diameter of the manifold tube and can be in close contact with the periphery of the through hole in the outer peripheral surface of the upper and lower manifold tubes. Next, a plurality of finned tubes are arranged in parallel on one plane, and upper and lower end portions of adjacent finned tubes are connected by a connecting member. Then, the upper and lower end surfaces of the finned tube are brought into close contact with the outer peripheral surfaces of the upper and lower manifold tubes so that the through-holes and the pipes of the finned tube communicate with each other, and both end portions of the finned tube are connected to the upper and lower manifold tubes. Weld each by fillet welding. Thus, an evaporation unit having an air temperature type liquefied gas vaporizer is manufactured.
[0006]
By the way, the radial width of the annular fillet formed by welding is larger than the thickness of the finned tube in consideration of the welding strength. However, when welding, if the positions of the upper and lower manifold pipes and the finned pipes are shifted and the center axis of the finned pipe is displaced from the center of the through hole, the radial direction of the annular fillet viewed from the outside after welding Even if the widths are the same, a thin portion of the fillet actually occurs, and the weld strength of this portion decreases. A problem may arise when the air temperature type liquefied gas vaporizer is operated and the internal pressure becomes high.
[0007]
Conventionally, both pipes have been positioned as shown in FIG. 9 in order to prevent a shift between the center of the through hole of the upper and lower manifold pipes and the central axis of the finned pipe.
[0008]
That is, a cylindrical insertion part (52) to be inserted into the through hole (51) of the upper and lower manifold pipes (50), and formed integrally at the upper end of the insertion part (52) and larger in diameter than the insertion part (52) Cylindrical ruler part (53), the outer diameter of the ruler part (53) is made equal to the outer diameter of the finned pipe (54), and the lower end surface of the ruler part (53) is the outer periphery of the manifold pipe (50) A ruled part in which the bottom edge of the outer peripheral surface of the ruler part (53) is a crease needle guide part (55) so as to be in close contact with the part around the through hole (51) on the surface. Prepare ingredients (56). Then, the insertion portion (52) of the ruler (56) is inserted into the through hole (51) of the manifold tube (50), and the lower end surface of the ruler portion (53) is brought into close contact with the outer peripheral surface of the manifold tube (50). After that, a ruled line (57) is drawn along the ruled needle guide part (55) of the ruler part (53) with a ruled needle (not shown). Next, both end surfaces of the finned tube (54) are brought into close contact with the outer peripheral surface of the manifold tube (50) so that the outer peripheral edges of both end surfaces are located on the ruled line (57). Thus, the positioning of both pipes (50) (54) has been performed. In this state, both pipes (50) (54) were welded by the fillet welding method.
[0009]
[Problems to be solved by the invention]
However, in the conventional method, the ruled line is hidden by the fillet after welding, and therefore, if a deviation occurs during the welding operation, the deviation cannot be confirmed after welding.
[0010]
An object of the present invention is to solve the above-described problems and provide a fluid flow device capable of confirming deviation after welding, a manufacturing method thereof, an air temperature type liquefied gas vaporizer, and a manufacturing method thereof.
[0011]
[Means for Solving the Problems]
The fluid flow device according to the first aspect of the present invention is formed by welding one end of at least one second metal tube in a continuous manner to the peripheral wall of the first metal tube, and the peripheral wall of the first metal tube. A concave partial cylinder in which a circular through hole is formed, and the end surface of the second metal tube is equal to the curvature of the outer diameter of the first metal tube and can be in close contact with the portion around the through hole on the outer peripheral surface of the first metal tube The end surface of the second metal tube is brought into close contact with the outer peripheral surface of the first metal tube so that the through hole and the conduit of the second metal tube communicate with each other. In a fluid flow device welded to one metal pipe by fillet welding, the both ends of the through hole on the outer peripheral surface of the first metal pipe extend through the center of the through hole and in the length direction of the first metal pipe. Two crease lines located on the flat surface are projected outward from the fillet. The two scribe lines located on the flat surface are drawn on both sides of the outer peripheral surface of the end portion of the second metal tube so as to protrude outward from the fillet. It is.
[0012]
According to the first aspect of the present invention, the first metal tube and the second metal tube are displaced from each other by looking at the two ruled lines of the first metal tube and the two ruled lines of the second metal tube. It can be confirmed whether or not.
[0013]
According to a second aspect of the present invention, there is provided a fluid flow device according to the first aspect of the present invention, wherein a second flat surface passing through the center of the through hole and perpendicular to the flat surface is formed on both side portions of the through hole on the outer peripheral surface of the first metal tube. Two second scribing lines located on the surface are drawn so as to protrude outward from the fillet, respectively, on the outer peripheral surface of the end of the second metal tube, on the second flat surface The two second scribe lines that are positioned are drawn so as to protrude outward from the fillet.
[0014]
In this case, in addition to the two crease lines in the first aspect of the invention, the first and second crease lines of the first metal tube and the second crease line of the second metal tube are viewed to obtain the first crease line. It can be confirmed more accurately whether the metal tube and the second metal tube are misaligned.
[0015]
According to a third aspect of the present invention, there is provided a method of manufacturing a fluid circulation device, wherein the first metal tube is formed by welding one end of at least one second metal tube to the peripheral wall of the first metal tube. A circular through hole is formed in the peripheral wall, and the end surface of the second metal tube has a concave partial cylindrical shape that is equal to the curvature of the outer diameter of the first metal tube and can be in close contact with the outer peripheral surface of the first metal tube, The end surface of the second metal tube is brought into close contact with the outer peripheral surface of the first metal tube so that the through hole and the conduit of the second metal tube communicate with each other, and the end of the second metal tube is connected to the first metal tube. A method of manufacturing a fluid distribution device welded by a fillet welding method, passing through the center of a through hole on both side portions of the through hole on the outer peripheral surface of a first metal tube having a circular through hole formed on a peripheral wall. In addition, two scribing lines located on a flat surface extending in the length direction of the first metal tube are welded respectively. It is pulled so as to protrude outward from the fillet formed, and the most recessed portion on the end surface passes through the central axis of the second metal tube on both sides of the outer peripheral surface of the end portion of the second metal tube Two scribing lines located on the flat surface passing through are drawn so as to protrude outward from the fillet formed by welding, respectively, and the second scribing lines so that the scoring lines of both metal tubes match. This includes bringing the end face of the metal tube into close contact with the portion around the through hole in the outer peripheral surface of the first metal tube, and welding both metal tubes by fillet welding in this state.
[0016]
In the fluid circulation device manufactured according to the invention of claim 3, the two scribe lines of the first metal tube and the two scribe lines of the second metal tube can be seen even after welding. Whether or not the first metal tube and the second metal tube are displaced with respect to the line can be confirmed after welding.
[0017]
According to a fourth aspect of the present invention, there is provided a fluid distribution device manufacturing method according to the third aspect of the present invention, wherein both sides of the through hole on the outer peripheral surface of the first metal tube pass through the center of the through hole and the central axis of the first metal tube. Two second scribing lines located on a second flat surface perpendicular to each other are drawn so as to protrude outward from the fillet formed by welding, respectively, and at the end of the second metal tube Two second scoring lines extending in the length direction of the second metal tube are disposed outside the fillet formed by welding at positions 90 degrees apart in the circumferential direction from the two scoring lines on the outer peripheral surface. When the end surface of the second metal tube is brought into close contact with the outer peripheral surface of the first metal tube, the second scribe lines of the two metal tubes are made to coincide with each other.
[0018]
In the fluid circulation device manufactured according to the invention of claim 4, since the four ruled lines of the first metal tube and the four ruled lines of the second metal tube can be seen even after welding, these ruled lines can be seen. Whether or not the first metal tube and the second metal tube are displaced with respect to the line can be confirmed more accurately after welding.
[0019]
An air temperature type liquefied gas vaporizer according to the invention of claim 5 includes an evaporating part and a heating part, and the evaporating part is a pair of manifold pipes arranged in parallel with each other in the vertical direction; By arranging a plurality of evaporating units consisting of a plurality of finned pipes arranged at intervals in the left-right direction between the two manifold pipes and welded to the two manifold pipes at the upper and lower ends, respectively, in parallel in the front-rear direction. The same number of circular through-holes are formed in the peripheral walls of the upper and lower manifold pipes as spaced apart from each other in the left-right direction, and the upper and lower end faces of the finned pipes are outside the upper and lower manifold pipes. It is a concave partial cylindrical shape that is equal to the curvature of the diameter and can adhere to the periphery of the through hole in the outer peripheral surface of the upper and lower manifold tubes, and the upper and lower end surfaces of the finned tube are on the outer peripheral surface of the upper and lower manifold tubes, In the air temperature type liquefied gas vaporizer in which the through hole and the pipe line of the finned pipe are brought into close contact with each other, and both ends of the finned pipe are welded to the upper and lower manifold pipes by fillet welding, respectively. Two crease lines located on the vertical plane that passes through the center of the through hole and extends in the left and right direction protrude outwardly from the fillet on the left and right sides of each through hole on the outer peripheral surface of the upper and lower manifold pipes. So that the two crease lines located on the vertical surface protrude outward from the fillet on the left and right sides of the outer peripheral surface of the upper and lower ends of the finned tube. It is what is drawn.
[0020]
According to the invention of claim 5, whether the upper and lower manifold pipes and the finned pipe are misaligned by looking at the two crease lines of the upper and lower manifold pipes and the two crease lines of the finned pipe. You can check whether or not.
[0021]
The air temperature type liquefied gas vaporizer according to the invention of claim 6 is the invention of claim 5, wherein the air temperature type liquefied gas vaporizer extends in the front-rear direction through the center of the through-hole at both front and rear sides of each through-hole on the outer peripheral surface of the upper and lower manifold pipes. Two second scribing lines located on the second vertical surface are drawn so as to protrude outward from the fillet, respectively, on the front and rear side portions of the outer peripheral surface of the upper and lower ends of the finned tube. The two second scribing lines located on the second vertical plane are drawn so as to protrude outward from the fillet.
[0022]
In this case, in addition to the two crease lines in the invention of claim 5, by looking at the two second crease lines of the upper and lower manifold pipes and the two second crease lines of the finned pipe, the upper and lower manifolds It is possible to more accurately confirm whether or not the tube and the finned tube are displaced.
[0023]
A manufacturing method of an air temperature type liquefied gas vaporizer according to the invention of claim 7 includes a vaporizing section and a heating section, and the vaporizing sections are arranged in parallel to each other at intervals in the vertical direction. A plurality of evaporation units are arranged in parallel in the front-rear direction, consisting of a pipe and a plurality of finned pipes that are spaced apart in the left-right direction between both manifold pipes and whose upper and lower ends are welded to both manifold pipes. The same number of circular through holes as the finned pipes are formed in the peripheral walls of the upper and lower manifold pipes at intervals in the left-right direction, and the upper and lower end faces of the finned pipes are respectively connected to the upper and lower manifold pipes. It has a concave partial cylindrical shape that is equal to the curvature of the outer diameter of the pipe and can be in close contact with the outer peripheral surfaces of both the upper and lower manifold pipes. This is a method of manufacturing an air-temperature type liquefied gas vaporizer in which the pipes of the pipes with pipes are in close contact with each other and both ends of the pipes with fins are welded to the upper and lower manifold pipes by fillet welding, respectively. In addition, two left and right side portions of each through hole on the outer peripheral surface of the upper and lower manifold pipes having a plurality of circular through holes formed on the peripheral wall are positioned on a vertical plane that passes through the center of the through hole and extends in the left-right direction. The crease lines are drawn so that they protrude outwardly from the fillet formed by welding, and pass through the central axis of the finned tube to the left and right sides of the outer peripheral surface of the upper and lower ends of the finned tube. In addition, the two crease lines located on the flat surface passing through the most concave portion on the end face are drawn so as to protrude outward from the fillet formed by welding, and the upper and lower manifold pipes and fins are drawn. The upper and lower end surfaces of each finned tube are brought into close contact with the periphery of each through-hole on the outer peripheral surface of both upper and lower manifold tube pipes so that the scribing lines of the pipes are aligned. It includes welding the attached tube to the fillet welding method.
[0024]
In the air temperature type liquefied gas vaporizer manufactured according to the invention of claim 7, since the two crease lines of the upper and lower manifold pipes and the two crease lines of the finned pipe can be seen even after welding, these It can be confirmed after welding whether the upper and lower manifold pipes and the finned pipe are misaligned with respect to the ruled line.
[0025]
The manufacturing method of the air temperature type liquefied gas vaporizer according to the invention of claim 8 is the invention of claim 7, in which both the front and rear sides of each through hole on the outer peripheral surface of the upper and lower manifold pipes pass through the center of the through hole and The two second scoring lines located on the second vertical plane extending in the direction are drawn so as to protrude outward from the fillet formed by welding, and the outer periphery of the end of the finned tube Two second crease lines extending in the length direction of the finned tube are placed outward from the fillet formed by welding at positions 90 degrees apart from the two crease lines in the surface in the circumferential direction. When the end faces of the finned pipes are brought into close contact with the outer peripheral surfaces of the upper and lower manifold pipes, the second crease lines of the upper and lower manifold pipes and the finned pipes are made to coincide with each other.
[0026]
In the fluid circulation device manufactured according to the invention of claim 8, since the four crease lines of the upper and lower manifold pipes and the four crease lines of the finned pipe can be seen even after welding, these crease lines As a reference, it can be more accurately confirmed after welding whether the upper and lower manifold pipes and the finned pipe are misaligned after welding.
[0027]
A scoring device according to the invention of claim 9 is a scoring device used for manufacturing the fluid circulation device of claim 1 or the air-temperature type liquefied gas vaporizer of claim 5, which is mutually separated at a predetermined interval. A pair of tube holders provided so as to be able to approach and separate from each other, and a center which is provided in the opposite portions of both tube holders and is fitted into both ends of the metal tube to center the metal tube A linear guide provided between the pipe holders so as to be parallel to the metal pipes held by the pipe holders and passing through the central axis of the metal pipe, and a length of the guides The guide moves in the length direction of the guide with respect to at least one of the tube holders when the two tube holders approach and separate from each other. It is made to be able to do.
[0028]
According to the scoring device of the ninth aspect of the present invention, the pipe is held by both pipe holders while the pipe is centered by the center, and the scribing needle is moved along the guide. In the case of manufacturing the fluid distribution device, the two scoring lines of the first metal pipe are used. In the case of manufacturing the air temperature type liquefied gas vaporizer of claim 5, the two scoring systems of the upper and lower manifold pipes are used. Each line can be easily drawn.
[0029]
The scoring device according to the invention of claim 10 is a scoring device used for manufacturing the fluid circulation device of claim 1 or the air temperature type liquefied gas vaporizer of claim 5, which is fixed to the base and the base. A cylindrical positioning portion whose tip is inserted into the opening of the metal tube, a support portion fixed to the outer peripheral surface of the positioning portion and supporting the end surface of the metal tube, and a positioning portion. On the other hand, it is composed of a pair of ruler portions that are spaced apart in the radial direction of the positioning portion by more than the thickness of the metal tube and spaced in the circumferential direction of the positioning portion, and each ruler portion extends in the vertical direction. The ruler needle guide portions of the two ruler portions are positioned at the most recessed portion of the end surface of the metal tube that is covered with the positioning portion and that receives the end surface of the support portion. Are spaced apart from each other by 180 degrees in the circumferential direction. It is those who are.
[0030]
According to the scoring device of the tenth aspect of the present invention, the positioning part is fitted into the end opening of the pipe and the end face of the pipe is supported by the support part, and the scoring is made along the scoring needle guide part of the ruler part. Since the scribing line can be drawn by the writing needle, when manufacturing the fluid flow device of claim 1, the two scoring lines of the second metal pipe are connected to the air temperature type liquefied gas vaporizer of claim 5. In the case of manufacturing, two ruled lines of the finned tube can be drawn easily.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0032]
1 and 2 show the overall configuration of an air temperature type liquefied gas vaporizer according to the present invention, and FIG. 3 shows the configuration of the main part thereof. In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.
[0033]
1 and 2, the air temperature type liquefied gas vaporizer (1) includes a plurality of evaporation units (2) arranged in parallel at intervals in the front-rear direction, and a plurality of evaporation units (3). And a heating section (4) in which finned meandering pipes (5) are arranged in parallel at intervals in the front-rear direction.
[0034]
The evaporation unit (3) is arranged between a pair of aluminum manifold pipes (6) (7), which are arranged in parallel with each other at an interval in the vertical direction and extend in the left-right direction, and both manifold pipes (6) (7). An aluminum finned tube (8) is provided in the left-right direction and the upper and lower ends are respectively connected to both manifold tubes (6) and (7).
[0035]
An outward flange (6a) is fixed to both ends of the upper manifold pipe (6) of the evaporation unit (3), and a blind flange (9) is attached to the outward flange (6a) through a suitable sealing material (not shown). ) Is detachably fixed, so that both end openings of the upper manifold pipe (6) are closed. The left end of the lower manifold tube (7) in the front half evaporation unit (3) and the left end of the lower manifold tube (7) in the rear half evaporation unit (3) are spaced apart in the front-rear direction. And it is connected to the inlet header pipe (11) extending in the front-rear direction. A branch pipe (12) is connected to the inlet header pipe (11), and a liquefied gas inlet (13) is formed at the center of the branch pipe (12). An outward flange (7a) is fixed to the right end of the lower manifold pipe (7), and the blind flange (14) is detachably fixed to the outward flange (7a) via an appropriate sealing material (not shown). Thus, the right end opening of the lower manifold pipe (7) is closed.
[0036]
As shown in FIG. 3, the same number of circular through holes (21) as the finned tubes (8) are formed in the peripheral wall of the lower manifold tube (7) at intervals in the length direction. The inner diameter of the through hole (21) is substantially equal to the inner diameter of the finned tube (8). The lower end surface of the finned tube (8) is a concave partial cylinder that is equal to the curvature of the outer diameter of the lower manifold tube (7) and can be in close contact with the periphery of the through hole (21) on the outer peripheral surface of the lower manifold tube (7). It is made into a shape. Then, the lower end surface of the finned tube (8) is brought into close contact with the outer peripheral surface of the lower manifold tube (7) so that the through hole (21) and the conduit of the finned tube (8) communicate with each other. The lower end of the attached tube (8) is welded to the lower manifold tube (7) by fillet welding. On the outer peripheral surface of the lower manifold pipe (7), a scribe line (22) located on a vertical plane passing through the center of all the through holes (21) and extending in the left-right direction is formed over the entire length. As a result, two crease lines located on the right and left sides of each through-hole (21) on the outer peripheral surface of the lower manifold pipe (7) are located on a vertical plane that passes through the center of the through-hole (21) and extends in the left-right direction. (22) is drawn so as to protrude outward from the fillet (23). In addition, two ruled lines (24) located on a vertical plane extending in the left-right direction passing through the center of all the through holes (21) on the left and right sides of the outer peripheral surface of the lower end of the finned tube (8) However, they are drawn so as to protrude upward (outward) from the fillet (23). Although not shown in the figure, the same scribing lines as those described above are also drawn at the upper ends of the upper manifold pipe (6) and the finned pipe (8).
[0037]
The finned tube (8) of the evaporation unit (3) is made of, for example, an aluminum extruded shape, and a plurality of fins (8a) extending in the vertical direction on the outer peripheral surface are integrally formed radially and on the inner peripheral surface. Inner fins (8b) composed of a plurality of ridges extending in the vertical direction are integrally formed at intervals in the circumferential direction. In each evaporation unit (3), the fins (8a) of the finned pipes (8) adjacent in the left-right direction are connected by connecting members (15) at both upper and lower ends. The connecting member (15) has, for example, a S-shaped cross section so that the upper and lower manifold pipes (7) can absorb the expansion and contraction in the length direction due to the influence of heat.
[0038]
The heating unit (4) shall be arranged in parallel on the right side of each evaporation unit (3) so that each finned meander pipe (5) is at a position corresponding to the evaporation unit (3) in the front-rear direction. It is comprised by. Each finned meandering tube (5) is formed, for example, by connecting a plurality of straight tubular finned tubes (16) with U-bends (17). The straight tubular finned tube (16) has the same configuration as the finned tube (8) of the evaporation unit (3), and the fins (16a) of the adjacent straight tubular finned tubes (16) are connected to each other (15 ). One end of each finned meander pipe (5) is connected to the right side of the rightmost finned pipe (8) in the upper manifold pipe (6) of each evaporation unit (3). It is connected to an outlet header pipe (18) extending in the front-rear direction and arranged below the warm section (4). A gas outlet (19) is formed at the center of the outlet header pipe (18).
[0039]
In the air temperature type liquefied gas vaporizer (1) having the above configuration, the liquefied gas stored in the storage tank is sent from the liquefied gas inlet (13) through the diverter pipe (12) into the inlet header pipe (11), and the inlet. It flows into the lower manifold pipe (7) of each evaporation unit (3) through the header pipe (11). The liquefied gas that has flowed into the lower manifold pipe (7) is diverted to all the finned pipes (8) and is regasified by exchanging heat with the atmosphere while flowing upward in the finned pipe (8). The gas flows through the upper manifold pipe (6) into the finned meander pipe (5) of the heating section (4) and exchanges heat with the atmosphere while flowing through the finned meander pipe (5). For example, it is heated to 0 ° C. or higher. The heated gas flows into the outlet header pipe (18) and is sent out from the gas outlet (19).
[0040]
4 to 6 show a method of manufacturing the evaporation unit (3) of the air temperature type liquefied gas vaporizer (1).
[0041]
First, as shown in FIG. 4, through the outer peripheral surface of the upper and lower manifold pipes (6) (7) having a plurality of circular through holes (21) formed on the peripheral wall, a through hole is used. A ruled line (22) located on a vertical plane passing through the center of (21) and extending in the left-right direction is drawn over the entire length of the upper and lower manifold pipes (6) (7).
[0042]
The scoring device (25) includes a horizontal rectangular plate-like base (26) that is long in the left-right direction, a first tube holder (27) fixed to the right end of the base (26), and a base (26). The second pipe holder (28) attached to the left end so as to be movable in the length direction of the base (26) and both pipe holders (27) and (28) are provided so as to face each other. Also, hold both pipes between the center (29) (30), which is fitted into the end openings of the upper and lower manifold pipes (6) (7) and centered, and both pipe holders (27) (28). Located on a vertical plane extending in the left-right direction passing through the central axis of the pipes (6) and (7) and parallel to the manifold pipes (6) and (7) held by the tools (27) and (28) It consists of a linear guide (31) and a scriber needle (32) attached to the guide (31) so as to be movable in its length direction. The guide (31) slidably penetrates the outward flange (33) provided at the proximal end of the center (30) of the second tube holder (28), and the second tube holder When (28) moves, it can move in the left-right direction with respect to the second tube holder (28). Then, the centers (29) and (30) of both pipe holders (27) and (28) are fitted into the opening at both ends of the upper and lower manifold pipes (6) and (7), and the upper and lower manifold pipes (6) and (7) are fitted. Hold the centered position and move the scribing needle (32) along the guide (31) to draw the scribing line (22) on the outer peripheral surface of the upper and lower manifold pipes (6) (7). .
[0043]
In addition, as shown in FIG. 5, both end surfaces of the finned tube (8) are vertically and vertically disposed on the left and right sides of the outer peripheral surface of the upper and lower ends of the finned tube (8) using a scribing device (34). Two scribing lines located on the vertical plane where the scribing lines (22) of the upper and lower manifold pipes (6) (7) are located when they are in close contact with the outer peripheral surface of the manifold pipe (6) (7) ( 24), that is, two scribing lines (24) located on a flat surface passing through the central axis of the finned tube (8) and passing through the most recessed portion of the end face are each filled with a fillet (23 ) So that it protrudes outward than.
[0044]
The scoring device (34) includes a disc-shaped base (35) and a cylindrical positioning portion (36) formed integrally with the base (35) and having a tip portion inserted into the opening of the finned tube (8). ), A support portion (37) formed integrally with the outer peripheral surface of the positioning portion (36) and supporting the end surface of the finned tube (8), and the diameter of the positioning portion (36) with respect to the positioning portion (36). Integrated with the base (35) and the support (37) at a distance equal to or slightly larger than the wall thickness of the peripheral wall of the finned tube (8) in the direction and at a distance in the circumferential direction of the positioning part (36) It consists of a pair of ruler parts (38) formed in. Each ruler part (38) has a linear ruler needle guide part (39) extending in the vertical direction, and the ruler needle guide part (39) of both ruler parts (38) is a positioning part (36). The finned tube (8), which is covered with the support portion (37) and receives the end surface, is spaced apart from each other by 180 degrees in the circumferential direction so as to be located at the most concave portion of the end surface. Then, in the state where the positioning portion (36) is fitted into the end opening of the finned tube (8) and the end surface of the finned tube (8) is supported by the support portion (37), both ruler portions (38) A ruled line is drawn by a ruled needle along the ruled needle guide part (39).
[0045]
Next, a predetermined number of the finned tubes (8) are arranged in parallel on one plane, and both ends of the fins (8a) of the adjacent finned tubes (8) are connected by the connecting member (15). Next, the upper and lower end faces of the finned tube (8) should be connected to the upper and lower manifold tubes (6) (7) and the finned tube (8) so that the scribing lines (22) and (24) match. The manifold pipes (6) and (7) are brought into close contact with the peripheral portions of the through holes (21) on the outer peripheral surface (see FIG. 6 (a)) and temporarily fixed by welding. Finally, both ends of the finned pipe (8) are welded to the upper and lower manifold pipes (6) and (7) by the fillet welding method (see FIG. 6 (b)). Thus, the evaporation unit (3) is manufactured.
[0046]
7 and 8 show another embodiment of the method for producing the evaporation unit (3) of the air temperature type liquefied gas vaporizer (1).
[0047]
First, as in the case of FIG. 4, a scoring device (25) is used to penetrate the outer peripheral surfaces of the upper and lower manifold pipes (6) (7) having a plurality of circular through holes (21) formed in the peripheral wall. A ruled line (22) positioned on a vertical plane passing through the center of the hole (21) and extending in the left-right direction is drawn over the entire length of the upper and lower manifold pipes (6) (7). In addition, on the both front and rear sides of each through hole (21) on the outer peripheral surface of the upper and lower manifold pipes (6) and (7), use an appropriate scoring device and pass through the center of the through hole (21) in the front and rear direction. Two second scribe lines (40) located on the extending second vertical surface are drawn so as to protrude outward from the fillet (23) formed by welding.
[0048]
Also, using the scoring device (41), draw two scribing lines (24) on the left and right sides of the outer peripheral surface of the upper and lower ends of the finned tube (8), and the finned tube (8) Two second crease lines (42) extending in the length direction of the finned tube (8) at positions 90 degrees apart in the circumferential direction from the two crease lines (24) on the outer peripheral surfaces of the upper and lower ends, Pull each so that it protrudes outward from the fillet (23).
[0049]
As shown in FIG. 7, the scoring device (41) has a base (35) and a support portion (37) spaced apart from the ruler portion (38) in the scoring device (34) shown in FIG. And two ruler portions (43) formed integrally with each other. Each ruler part (43) has a linear ruler needle guide part (44) extending in the vertical direction, and the ruler needle guide part (44) of both ruler parts (43) is positioned to the positioning part (36). The finned tube (8) that is covered with the support portion (37) and that is received at the end face is spaced apart by 180 degrees in the circumferential direction so as to be located at the most protruding portion of the end face. The needle guide portion (39) is spaced 90 degrees in the circumferential direction.
[0050]
Then, the positioning portion (36) is fitted into the end opening of the finned tube (8), and the four ruler portions (38) are supported while the end surface of the finned tube (8) is supported by the support portion (37). ) (43) The ruled lines (24) and (42) are drawn by the ruled needles along the ruled needle guides (39) and (44) (see FIG. 7).
[0051]
Next, a predetermined number of the finned tubes (8) are arranged in parallel on one plane, and both ends of the fins (8a) of the adjacent finned tubes (8) are connected by the connecting member (15). Next, the upper and lower end faces of the finned tube (8) are marked on the vertical plane extending in the left-right direction of the upper and lower manifold tubes (6) (7) and the finned tube (8) (22) (24 ), And the through-holes (21) on the outer peripheral surfaces of the upper and lower manifold pipes (6) (7), respectively, so that the scribing lines (40) (42) located on the vertical plane extending in the front-rear direction match. (See FIG. 8 (a)) and temporarily fixed by welding. Finally, both ends of the finned pipe (8) are welded to the upper and lower manifold pipes (6) and (7) by the fillet welding method (see FIG. 8 (b)). Thus, the evaporation unit (3) is manufactured.
[0052]
【The invention's effect】
According to invention of Claims 1-4, the shift | offset | difference of a 1st metal tube and a 2nd metal tube can be confirmed even after the welding of the 1st metal tube and 2nd metal tube of a fluid distribution apparatus.
[0053]
According to the inventions of claims 5 to 8, it is possible to confirm the deviation between the upper and lower manifold tubes and the finned tube even after welding the upper and lower manifold tubes of the air temperature type liquefied gas vaporizer to the finned tube. it can.
[Brief description of the drawings]
FIG. 1 is a front view showing an air temperature type liquefied gas vaporizer according to the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is an enlarged perspective view showing a main part of an air temperature type liquefied gas vaporizer according to the present invention.
FIG. 4 is a perspective view showing a method of drawing ruled lines on both upper and lower manifold pipes.
FIG. 5 is a perspective view showing a method for drawing a ruled line on a finned tube.
FIG. 6 is a perspective view showing a method of welding the upper and lower manifold pipes and the finned pipe in the evaporation unit of the air temperature type liquefied gas vaporizer.
FIG. 7 is a perspective view showing another example of a method for drawing a ruled line on a finned tube.
FIG. 8 is a perspective view showing another example of a welding method between the upper and lower manifold pipes and the finned pipe in the evaporation unit of the air temperature type liquefied gas vaporizer.
FIG. 9 is a partially enlarged perspective view showing a method of manufacturing an evaporation unit of a conventional air temperature type liquefied gas vaporizer.
[Explanation of symbols]
(1): Air-temperature liquefied gas vaporizer
(2): Evaporation section
(3): Evaporation unit
(4): Heating part
(6): Upper manifold tube
(7): Lower manifold tube
(8): Finned tube
(21): Circular through hole
(22): Ruled line
(24): Ruled line
(25): Ruler
(27) (28): Tube holder
(29) (30): Center
(31): Guide
(32): Ruler needle
(34): Ruler
(36): Positioning part
(37): Support part
(38): Ruler section
(39): Ruled needle guide
(40): Ruled line
(42): Ruled line

Claims (10)

The first metal tube is formed by welding one end of at least one second metal tube in a continuous manner, and a circular through hole is formed in the peripheral wall of the first metal tube. The end surface of the tube has a concave partial cylindrical shape that is equal to the curvature of the outer diameter of the first metal tube and can be in close contact with the portion around the through hole in the outer peripheral surface of the first metal tube, and the end surface of the second metal tube is The through hole and the conduit of the second metal tube are brought into close contact with the outer peripheral surface of the first metal tube, and the end of the second metal tube is welded to the first metal tube by fillet welding. In the fluid distribution device,
Two scribing lines located on a flat surface that passes through the center of the through hole and extends in the length direction of the first metal tube are formed on both sides of the through hole on the outer peripheral surface of the first metal tube, respectively, rather than the fillet. The two scribe lines located on the flat surface protrude outward from the fillet on both sides of the outer peripheral surface of the end of the second metal tube. A fluid flow device that is being pulled to. Two second crease lines located on the second flat surface passing through the center of the through hole and orthogonal to the flat surface are formed on both sides of the through hole on the outer peripheral surface of the first metal tube from the fillet. Are drawn so as to protrude outward, and the two second scribe lines located on the second flat surface are respectively outward from the fillet on the outer peripheral surface of the end of the second metal tube. The fluid flow device according to claim 1, wherein the fluid flow device is pulled so as to protrude from the top. The first metal tube is formed by welding one end of at least one second metal tube in a continuous manner, and a circular through hole is formed in the peripheral wall of the first metal tube. The end surface of the tube has a concave partial cylindrical shape that is equal to the curvature of the outer diameter of the first metal tube and can be in close contact with the outer surface of the first metal tube, and the end surface of the second metal tube is the outer periphery of the first metal tube Manufactures a fluid flow device in which a through-hole and a pipe line of a second metal pipe are in close contact with each other so that the end of the second metal pipe is welded to the first metal pipe by fillet welding A way to
Two rules located on a flat surface passing through the center of the through-hole and extending in the length direction of the first metal tube on both sides of the through-hole on the outer peripheral surface of the first metal tube having a circular through-hole formed in the peripheral wall The writing lines are drawn so as to protrude outwardly from the fillet formed by welding, and pass through the central axis of the second metal tube on both sides of the outer peripheral surface of the end of the second metal tube, and The two scribing lines located on the flat surface passing through the most concave part of the end face are drawn so as to protrude outward from the fillet formed by welding, and the scoring lines of both metal pipes are drawn. An end face of the second metal tube is brought into close contact with a portion around the through hole in the outer peripheral surface of the first metal tube so as to match, and in this state, the two metal tubes are welded by fillet welding. Production method. Two second scribe lines located on the second flat surface passing through the center of the through hole and perpendicular to the central axis of the first metal tube are formed on both sides of the through hole on the outer peripheral surface of the first metal tube. Each is pulled so as to protrude outward from the fillet formed by welding, and the second metal pipe is positioned at a position 90 degrees away from the two scribing lines on the outer peripheral surface of the second metal tube in the circumferential direction. Two second scribe lines extending in the length direction of the two metal tubes are drawn so as to protrude outward from the fillet formed by welding, and the end surface of the second metal tube is drawn to the first metal tube. The method for producing a fluid circulation device according to claim 3, wherein the second scribe lines of the metal pipes are made to coincide with each other when closely contacting the outer peripheral surface of the metal pipe. An evaporating section and a heating section, the evaporating section being arranged with a pair of manifold pipes arranged in parallel with each other in the vertical direction and with a space in the left-right direction between the two manifold pipes; Evaporating units consisting of multiple finned pipes whose upper and lower ends are welded to both manifold pipes are arranged in parallel in the front-rear direction. The same number of circular through-holes as the finned pipes are formed at intervals in the direction, and the upper and lower end faces of the finned pipes are equal to the curvature of the outer diameters of the upper and lower manifold pipes, and penetrate the outer peripheral surfaces of the upper and lower manifold pipes. It is a concave partial cylindrical shape that can be in close contact with the periphery of the hole, so that the upper and lower end faces of the finned tube communicate with the outer peripheral surface of the upper and lower manifold tubes and the through hole and the pipe of the finned tube communicate with each other Made me wear, the air temperature-liquefied gas vaporizer which is welded by a weld process corners respective opposite ends of the finned tubes in the upper and lower manifold pipe,
Two crease lines located on the vertical plane that passes through the center of the through hole and extends in the left and right direction protrude outwardly from the fillet on the left and right sides of each through hole on the outer peripheral surface of the upper and lower manifold pipes. So that the two crease lines located on the vertical surface protrude outward from the fillet on the left and right sides of the outer peripheral surface of the upper and lower ends of the finned tube. Air temperature liquefied gas vaporizer being pulled. Two second crease lines located on the second vertical plane extending through the center of the through hole and extending in the front-rear direction on the front and rear side portions of the through holes on the outer peripheral surfaces of the upper and lower manifold pipes are respectively filled with fillets. Are drawn so as to protrude outward, and two second crease lines located on the second vertical surface are respectively filleted on the front and rear sides of the outer peripheral surface of the upper and lower ends of the finned tube. The air temperature type liquefied gas vaporizer according to claim 5, wherein the air temperature type liquefied gas vaporizer is drawn so as to protrude outward. An evaporating section and a heating section, the evaporating section being arranged with a pair of manifold pipes arranged in parallel with each other in the vertical direction and with a space in the left-right direction between the two manifold pipes; Evaporating units consisting of multiple finned pipes whose upper and lower ends are welded to both manifold pipes are arranged in parallel in the front-rear direction. The same number of circular through-holes as the finned tubes are formed at intervals in the direction, and the upper and lower end surfaces of the finned tube are equal to the curvature of the outer diameter of the upper and lower manifold tubes, and are in close contact with the outer peripheral surfaces of the upper and lower manifold tubes. The upper and lower end surfaces of the finned tube are brought into close contact with the outer peripheral surfaces of the upper and lower manifold tubes so that the through holes and the pipes of the finned tubes communicate with each other. A method of both ends of the feeder tube to produce the air temperature-liquefied gas vaporizer which is welded by the respective fillet welding method upper and lower manifold pipe,
Two scoring lines located on the left and right sides of each through-hole on the outer peripheral surface of the upper and lower manifold pipes having a plurality of circular through-holes formed on the peripheral wall on a vertical plane that passes through the center of the through-hole and extends in the left-right direction Are drawn so as to protrude outwardly from the fillet formed by welding, and pass through the central axis of the finned tube on the left and right side portions of the outer peripheral surface of the upper and lower ends of the finned tube and at the end surface. Two crease lines located on the flat surface passing through the most concave part are drawn so as to protrude outward from the fillet formed by welding, and the creases of the upper and lower manifold pipes and finned pipes are drawn. The upper and lower end faces of each finned tube are brought into close contact with the peripheral part of each through hole in the outer peripheral surface of the upper and lower manifold tube pipes so that the writing lines match. Method for producing air-temperature-liquefied gas vaporizer comprises welding by the tube and the fillet welding. Two second crease lines located on the second vertical surface extending through the center of the through hole and extending in the front-rear direction are formed by welding on the front and rear side portions of each through hole on the outer peripheral surface of the upper and lower manifold pipes, respectively. The length of the finned tube is pulled out so as to protrude outward from the fillet and is spaced 90 degrees in the circumferential direction from the two scribe lines on the outer peripheral surface of the end of the finned tube. Two second scribe lines extending in the direction are drawn so as to protrude outward from the fillet formed by welding, and the end faces of the finned pipes are brought into close contact with the outer peripheral faces of the upper and lower manifold pipes. The method for producing an air temperature type liquefied gas vaporizer according to claim 7, wherein the second scribe lines of the upper and lower manifold pipes and the finned pipe are matched with each other. A scoring device used for manufacturing the fluid circulation device of claim 1 or the air temperature type liquefied gas vaporizer of claim 5,
A pair of tube holders provided so as to be able to approach and separate from each other at a predetermined interval, and provided in the mutually opposing portions of both tube holders and fitted into both end openings of the metal tube A straight line located between the center for centering the metal tube and the two tube holders so as to be parallel to the metal tube held by the two tube holders and passing through the central axis of the metal tube And a scribing needle attached to the guide so as to be movable in the longitudinal direction. When the guides are moved toward and away from each other, at least one of the guides is separated from the guide. A scribing device that can move in the length direction of the guide. A scoring device used to manufacture the fluid flow device of claim 1 or the air temperature type liquefied gas vaporizer of claim 5,
A base, a cylindrical positioning portion fixed to the base and having a tip inserted into the opening of the metal tube, and a support fixed to the outer peripheral surface of the positioning portion and supporting the end surface of the metal tube Each ruler part, and a pair of ruler parts spaced apart in the radial direction of the positioning part in the radial direction of the positioning part and spaced apart in the circumferential direction of the positioning part with respect to the positioning part Has a linear scribing needle guide portion extending in the vertical direction, and the scoring needle guide portions of the two ruler portions are covered with the positioning portion and the end face of the metal tube receiving the end face at the support portion is the most. A scribing device that is spaced apart from each other by 180 degrees in the circumferential direction so as to be located in the recessed portion.

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