Heat insulating member mounting device and method

Abstract

To provide a device and a method of easily attaching a heat insulation member to a fixing member of a member.SOLUTION: A first jig 80 is equipped with: a tapered portion 82 that is formed including one end of the first jig 80, and has a tapered tip end portion 83 and a tapered base end portion 84; and a connecting portion 86 that is formed including the other end of the first jig 80, and has at least an opening portion 87 provided on an end surface of the other end, and a hollow portion 88 extending from the opening portion 87 to the one end side and formed inside a connecting portion. The tapered portion 82 is formed so as to continuously or intermittently decreases external dimensions in a right-angled direction with respect to the first jig 80 of the tapered portion 82, as it goes from the tapered base end portion 84 toward the tapered tip end portion 83. The external dimensions in the right-angled direction with respect to a longitudinal direction of the first jig 80 of the tapered tip end portion 83 is formed to be smaller than the external dimensions in the right-angled direction with respect to a longitudinal direction of first and second fixing members of a fixing member tip end portion 35 that is a tip end portion of the first and second fixing members 31 and 32.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a method and apparatus for installing a heat insulating member provided in an expansion joint connected between ducts that transport heated fluid. [Background technology]

[0002] Conventionally, expansion joints are provided at the connection parts of ducts that transport fluids such as exhaust gas discharged from combustion equipment in thermal power plants, steelworks, waste incinerators, etc., to absorb thermal expansion, vibration, etc., of the ducts. The expansion joint disclosed in Patent Document 1 includes a pair of flanges connected to ducts on both sides of the expansion joint, respectively, and a plurality of laminated insulating members. The insulating members are formed to a length equivalent to the circumferential length of the flanges, and are attached in a cylindrical shape between the pair of flanges of the expansion joint along the circumferential direction of the flanges to surround the entire circumference of the flow path.

[0003] Fixing members such as stud bolts are arranged at equal intervals around the entire circumference of the annular end of each flange on the side where the flanges face each other. When attaching the heat insulating member to the flange, the tip of the stud bolt is pressed against one side of the heat insulating member, and the heat insulating member is struck from the other side with a striking tool such as a hammer, so that the stud bolt opens holes in the heat insulating member and penetrates it. This process is repeated until all the stud bolts have penetrated the heat insulating member, and the heat insulating member is fixed to the flange. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-150561 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, because the insulation member is made of a flexible insulation material wrapped in a mesh-like fiber cloth and a metal demister, it is not easy to make a hole in the insulation member by hitting it with a hammer using the tip of a stud bolt, and it takes time and effort. In addition, because the tip of the stud bolt is used to forcefully make a hole in the insulation member using a hammer, it is possible that a hole larger than necessary is made, which may make it easier for heat to be transferred inside the duct. Furthermore, there is a concern that if the head of the stud bolt is hit directly with a hammer, the tip will deform, making it impossible to attach the retaining bracket and nut.

[0006] The present invention has been made to solve the above-mentioned problems, and has an object to provide a method and an apparatus for easily attaching a heat insulating member to a member. [Means for solving the problem]

[0007] The first jig used when fixing an insulating member to a fixing member erected on a member of the present invention is characterized in that the tapered portion of the first jig has a tapered tip portion and a tapered base end portion, and the outer dimension of the tapered portion in a direction perpendicular to the longitudinal direction of the first jig is continuously or intermittently reduced from the tapered base end portion to the tapered tip portion, and the outer dimension of the tapered tip portion in a direction perpendicular to the longitudinal direction of the first jig is smaller than the outer dimension of the tip portion of the fixing member in a direction perpendicular to the longitudinal direction of the fixing member.

[0008] The outer dimensions of the tapered portion of the first jig of the present invention are formed by being continuously or intermittently reduced, and the outer dimensions of the tapered tip portion in a direction perpendicular to the longitudinal direction of the first jig are formed smaller than the outer dimensions of the tip portion of the fixing member. Therefore, when drilling a hole in the insulating member, the impact force of the impact tool is concentrated on the small end face of the tapered portion of the first jig, compared to drilling a hole without using the first jig, and the impact effect can be enhanced. Therefore, a through hole can be easily formed in the insulating member. Therefore, the insulating member can be easily attached to the member.

[0009] Moreover, the tapered tip portion of the first jig of the present invention is preferably formed into a pointed shape or a shape including a curved surface.

[0010] Since the tapered tip of the first jig is formed into a pointed shape or a shape including a curved surface, the tapered tip can be inserted into the holes in the mesh of the reinforcing material provided on the outer surface of the thermal insulation member, and the holes in the mesh can be enlarged by the continuous pressing force of the impact tool to form through holes. Therefore, the through holes can be easily formed in the thermal insulation member. Therefore, the thermal insulation member can be easily attached to the member.

[0011] Furthermore, it is preferable that the connection portion of the first jig of the present invention is formed on the inner surface of the hollow portion and includes a threaded portion corresponding to the threaded portion provided on the outer surface of the tip of the fixing member.

[0012] Since the connection portion of the working jig of the present invention includes a threaded portion, the first jig can be reliably and easily connected to the tip of the fixed member. Therefore, a through hole can be easily provided in the heat insulating member. Therefore, the heat insulating member can be easily attached to the member.

[0013] Furthermore, the present invention preferably comprises a jig set consisting of a first jig and a second jig, wherein the second jig is a tubular member having at least one end open and a hollow portion therein, and into which at least the tapered portion of the first jig can be inserted.

[0014] Since the present invention includes a jig set including a first jig and a second jig, a through hole can be easily provided in the heat insulating member, and therefore the heat insulating member can be easily attached to a member.

[0015] In addition, it is preferable that the method of installing an insulating member of the present invention includes a jig mounting step of mounting a first jig to the tip of a fixing member, a hole processing step of placing a predetermined position on one side of the insulating member against the tapered portion of the first jig and applying a pressing force with an impact tool to the other side of the insulating member to create a through hole in the insulating member using the first jig, thereby passing the fixing member through the insulating member, and a jig removal step of removing the first jig.

[0016] The method for attaching a heat insulating member of the present invention includes a jig attachment step, a hole processing step, and a jig removal step, so that the first jig can be easily attached to the fixed member, the through hole can be easily processed, and the first jig can be easily removed from the fixed member. Therefore, the through hole can be easily provided in the heat insulating member. Therefore, the heat insulating member can be easily attached to the member.

[0017] Furthermore, the hole processing step in the method for installing an insulating member of the present invention preferably involves placing a predetermined position on one side of the insulating member against the tapered portion of a first jig, pressing one end of a second jig formed from a hollow tube so as to surround the intersection of a line parallel to the central axis of the first jig passing through the tapered portion and the other side of the insulating member, and applying a pressing force to the other end of the second jig with an impact tool, thereby forming a through hole in the insulating member with the first jig and causing the fixing member to which the first jig is attached to penetrate the insulating member.

[0018] In the hole drilling step in the method for attaching a heat insulating member of the present invention, the second jig is used in addition to the first jig, so that through holes can be easily provided, and therefore the heat insulating member can be easily attached to the member. [Brief description of the drawings]

[0019] [Figure 1A] FIG. 1 is a perspective view showing a method for attaching a heat insulating member according to a first embodiment of the present invention, and an expansion joint to which the device is applied. [Figure 1B] FIG. 1B is a side view of the expansion joint of FIG. 1A. [Diagram 2] FIG. 2 is a cross-sectional view of the expansion joint of FIG. 1 along line II-II. [Diagram 3]FIG. 3 is a perspective view showing a part of the heat insulating member of FIG. 2. [Figure 4] FIG. 2 is a side cross-sectional view showing a first jig according to the first embodiment of the present invention. [Diagram 5] 5 is a schematic diagram showing a mounting step of the first jig in FIG. 4. [Figure 6] FIG. 4 is a schematic diagram showing a hole drilling step in the mounting method according to the first embodiment of the present invention. [Figure 7] FIG. 11 is a side cross-sectional view showing a first jig according to a second embodiment of the present invention. [Figure 8] 13 is a side cross-sectional view showing a first jig according to a modified example of the second embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] <Embodiment 1> The present invention relates to a method for attaching a heat insulating member provided in an expansion joint 100 to the expansion joint 100, and an apparatus therefor. Before describing the first embodiment of the present invention, an expansion joint 100 to which the present invention is applied will first be described with reference to the accompanying drawings. Figures 1A and 1B show an expansion joint 100 with a circular cross section, which is an example of an expansion joint to which the attachment method and apparatus of the present invention are applied. Also, Figure 2 is a cross-sectional view showing the II-II section of Figure 1B.

[0021] The expansion joint 100 is a device that connects ducts that transport fluids such as exhaust gas discharged from combustion equipment such as thermal power plants, steelworks, and waste incineration plants. The expansion joint 100 is a joint that can pass high-temperature and corrosive fluids discharged from combustion equipment and absorb thermal contraction and vibration of the duct. The size and shape of the expansion joint 100 are determined according to the duct to be connected. The diameter of the expansion joint 100 is, for example, 1 m or less to 10 m or more. The expansion joint 100 shown in FIG. 1A and FIG. 1B is an expansion joint 100 with a round cross-sectional shape. The expansion joint 100 has a cross-sectional shape selected from a round shape, a square shape including a rectangle, and an irregular shape according to the shape of the connection part of the duct to be connected. The expansion joint 100 includes a flange 10, heat insulating members 61 to 65, and a bellows 90. In addition, the flange 10 has a flange member 11 connected to the upstream duct, and a flange member 21 connected to the downstream duct.

[0022] 2 in addition to Figures 1A and 1B, the detailed shape of the expansion joint 100 will be described. The flange member 11 connected to the upstream duct has a main body member 12, a second rib 37, and a baffle 38. Note that Figure 2 shows the flange L of the upstream duct to which the flange member 11 is connected.

[0023] The main body member 12 has a first frame member 13 , a second frame member 16 , a first rib 19 , a first fixing member 31 , a second fixing member 32 , and a cover 33 .

[0024] The first frame member 13 and the second frame member 16 are combined to form an annular frame structure. The first frame member 13 has a first inner surface portion 14 and a first flange portion 15 formed in an annular shape. The first flange portion 15 has an inner diameter side peripheral end of the first flange portion 15 fixed to an upstream end of the first inner surface portion 14 in a state in which their central axes coincide with each other. The second frame member 16 has a second vertical portion 17 formed in an annular shape and a second flange portion 18. The second flange portion 18 is formed in a cylindrical shape, and a cylindrical downstream end portion is fixed to an outer diameter end portion of the second vertical portion 17 in a state in which the second flange portion 18 coincides with the central axis of the second vertical portion 17.

[0025] The second frame member 16 is fixed by welding with the inner diameter end of the second frame member 16 in contact with the outer peripheral surface of the first inner surface portion 14 of the first frame member 13. The first flange portion 15 has holes for fixing fastening members at regular intervals in the circumferential direction, and is fixed to the flange L of the upstream duct by the fastening member. A flat first rib 19 is attached to the first frame member 13 and the second frame member 16 and is arranged perpendicular to both of them so as to connect them. A plurality of first ribs 19 are arranged at regular intervals in the circumferential direction, and are welded to the first frame member 13 and the second frame member 16 to reinforce the main body member 12 and improve the strength and rigidity of the main body member 12.

[0026] The first inner surface portion 14 is provided with first fixing members 31 and second fixing members 32 for fixing heat insulating members 62 to 65 described later. The first fixing members 31 are provided at regular intervals in the circumferential direction on the outer peripheral surface of the first inner surface portion 14 at the downstream end in the fluid flow direction X of the first inner surface portion 14 perpendicular to the outer peripheral surface of the first inner surface portion 14. In addition, the second fixing members 32 are provided at regular intervals in the circumferential direction on the inner peripheral surface of the first inner surface portion 14 perpendicular to the inner peripheral surface of the first inner surface portion 14. The second fixing members 32 are arranged in a ring shape at regular intervals and are arranged in two rows in total, approximately near the center and near the downstream end of the first inner surface portion 14 in the fluid flow direction X.

[0027] The first fixing member 31 and the second fixing member 32, which are fixing members, are provided with a screw portion 36 at their tips. The heat insulating members 62 to 65 are held by passing through the first fixing member 31 or the second fixing member 32 corresponding to the through holes 78 provided in the heat insulating members 62 to 65. The first fixing member 31 and the second fixing member 32 are, for example, stud bolts or stud pins. The heat insulating members 62 and 63 are fixed with a pressing member and a nut. The pressing member is, for example, a washer 92 and a tie band 93. The washer 92 is formed of a rectangular plate member, and both ends of the washer 92 in the fluid flow direction X are bent downward, that is, toward the heat insulating member 62. The tie band 93 is a flexible metal rod, and is arranged so as to be wound around the entire circumference of the heat insulating member 62, and presses the heat insulating member 62 from the outer surface. The washer 92 is attached to the first fixing member 31 to hold the tie band 93. As a modified example, the pressing member may be composed only of a flat washer that holds the heat insulating member 62. Alternatively, the first fixing member 31 and the second fixing member 32 may be provided with an engaging portion having a fitting shape that corresponds to the engaging metal fitting by concave-convex fitting or the like, instead of the threaded portion at the tip, and configured to fit the corresponding fitting shape with the engaging metal fitting.

[0028] The second fixing member 32 fixes a cover 33 that covers the outer surface of the heat insulating member while holding the heat insulating member 65 arranged on the inner surface side (fluid side) of the first inner surface portion 14 described later. The cover 33 is a member that protects the heat insulating member from high-temperature and corrosive fluid flowing in the flow path. The cover 33 is made of metal and is formed into a rectangular parallelepiped cross section with the outer periphery side open. The cover 33 is attached so as to cover the heat insulating member, and the second fixing member 32 is passed through a through hole provided in the inner surface side flat surface portion 34 of the cover 33, and is fixed together with the heat insulating member with a nut.

[0029] A plate-shaped baffle 38 is attached to the inner flat surface 34 of the cover 33 with the flat surface of the upstream end of the baffle 38 in contact with it. A plate-shaped second rib 37 is fixed to the baffle 38 perpendicularly over the entire length of the baffle 38 in the fluid flow direction X. The second rib 37 is formed in an elongated polygonal shape in the fluid flow direction X. The plate-shaped second rib 37 is fixed perpendicularly to the inner flat surface 34 of the cover 33. The second rib 37 is formed in an elongated polygonal shape in the fluid flow direction X. The baffle 38 is fixed in a direction that blocks the fluid flowing from the central axis direction of the expansion joint 100 toward the outer circumferential surface, and is provided at regular intervals in the circumferential direction on the inner circumferential surface of the expansion joint 100. The baffle 38 reduces the possibility that a high-temperature corrosive fluid will hit and damage the heat insulating members 61 to 64 arranged between the flange members 11 and 21.

[0030] The flange member 21 connected to the downstream duct has a main body member 22. Note that Fig. 2 shows a flange M of the downstream duct to which the flange member 21 is connected. The main body member 22 has a first frame member 23, a second frame member 26, a first rib 29, a first fixing member 31, a second fixing member 32, and a cover 43.

[0031] The first frame member 23 and the second frame member 26 are members that are combined to form an annular frame structure. The first frame member 23 has a first inner surface portion 24 and a first flange portion 25 that is formed in an annular shape. The first flange portion 25 has an inner diameter end fixed to the downstream end portion of the first inner surface portion 24 in a state in which their central axes coincide with each other. The second frame member 26 has a second vertical portion 27 that is formed in an annular shape, and a second flange portion 28. The second flange portion 28 is formed in a cylindrical shape, and the cylindrical upstream end portion is fixed to the outer diameter end portion of the second vertical portion 27 in a state in which their central axes coincide with each other.

[0032] The second frame member 26 is fixed by welding, with the inner diameter end of the second vertical portion 27 in contact with the outer circumferential surface of the first inner surface portion 24 of the first frame member 23. The first flange portion 25 has holes for fixing fastening members bored at regular intervals in the circumferential direction, and is fixed to the flange M of the downstream duct by the fastening member. A flat first rib 29 is attached perpendicularly to the first inner surface portion 24 and the second vertical portion 27 so as to connect them. A plurality of first ribs 29 are welded at regular intervals in the circumferential direction, and reinforce the main body member 22, improving the strength and rigidity of the main body member 22.

[0033] The first inner surface portion 24 is provided with first fixing members 31 and second fixing members 32 for fixing a heat insulating member described later. The first fixing members 31 are provided perpendicular to the outer peripheral surface of the first inner surface portion 24 at regular intervals in the circumferential direction on the outer peripheral surface of the first inner surface portion 24 at the upstream end in the fluid flow direction X of the first inner surface portion 24. The second fixing members 32 are provided perpendicular to the inner peripheral surface of the first inner surface portion 24 at regular intervals in the circumferential direction on the inner peripheral surface of the first inner surface portion 24. The second fixing members 32 are arranged in a ring shape at regular intervals and are arranged in two rows in total, approximately near the center and near the upstream end of the first inner surface portion 24 in the fluid flow direction X.

[0034] The second fixing member 32 fixes a cover 43 that covers the outer surface of the heat insulating member while holding the heat insulating member arranged on the inner side of the first inner surface portion 24 described later. The cover 43 is a member that protects the heat insulating member from high-temperature and corrosive fluid flowing inside the duct. The cover 43 is made of metal and is formed into a rectangular parallelepiped cross section with the outer periphery side open. The cover 43 is attached so as to cover the heat insulating member, and the second fixing member 32 is passed through a through hole provided in the inner flat surface portion 44 of the cover 43, and is fixed together with the heat insulating member with a nut.

[0035] The second flange portions 18, 28 of the first frame members 13, 23 are provided with fastener holes at regular intervals in the circumferential direction, and the mounting fixtures 52, 52 are fixed by fasteners. The mounting fixtures 52, 52 are members with L-shaped cross sections whose flat portions are connected at right angles, and fastener holes are provided in both flat portions. The mounting fixtures 52, 52 are fixed by abutting one flat portion against the second flange portions 18, 28 and disposing the other flat portion on the adjacent side. Both ends of a shipping bolt 51 are passed through the fastener holes provided in the other flat portion of each of the mounting fixtures 52, 52, and are fastened by nuts. The shipping bolt 51 is a bolt that keeps the flange member 11 and the flange member 21 in a connected state until the expansion joint 100 is installed, and is removed when the flange members 11, 21 are connected to the flanges L, M of the duct to which they are connected.

[0036] Next, the arrangement of the heat insulating members 61-65 provided in the expansion joint 100 will be described. As shown in FIG. 2, the expansion joint 100 includes a plurality of heat insulating members 61-65. The heat insulating members 61-65 are formed to a predetermined width and a length equivalent to the total circumferential length of the flange members 11 and 21 in the circumferential direction. The heat insulating members 61-63 are arranged in a stacked manner between the second vertical portion 17 and the second vertical portion 27 on the outer circumferential side of the expansion joint 100. The heat insulating members 62 and 63 on the inside of the heat insulating members 61-63 are attached so that the first fixing member 31 is incorporated into the through holes 78 provided in advance at both ends of the heat insulating members 62 and 63 in the direction parallel to the fluid flow direction X, and are fixed with a pressing member such as a washer and a nut. The heat insulating member 61 is arranged on the outer circumferential side of the heat insulating member 62. A bellows 90 is arranged on the outer circumferential side of the heat insulating member 61, covering the entire outer circumferential surface of the heat insulating member 61. Both ends of the heat insulating members 61-63 in a direction parallel to the fluid flow direction X are in contact with the opposing surfaces of the second vertical portion 17 and the second vertical portion 27 without any gaps over the entire circumferential direction. Therefore, heat is prevented from leaking from between the heat insulating members 61-63 and the second vertical portion 17 and the second vertical portion 27.

[0037] Additionally, on the inner periphery side of the expansion joint 100, between the first flange portion 15 and the first flange portion 25, a heat insulating member 64 and heat insulating members 65, 65 are provided in a layered manner. The length of the heat insulating member 64 in a direction parallel to the fluid flow direction X is formed to be the same dimension as the dimension between the first flange portion 15 and the first flange portion 25. The heat insulating member 64 and the heat insulating members 65, 65 correspond to the second fixing member 32, respectively, and the second fixing member 32 is inserted, and the pressing fittings and covers 33, 43 are fixed with nuts.

[0038] The heat insulating members 61 to 65 will be described with reference to Fig. 3 in addition to Fig. 2. The heat insulating members 61 to 65 contain a plurality of materials, and include a heat insulating member 71, a first reinforcing member 72, and a second reinforcing member 73. Note that the heat insulating member 63 will be described as a representative of the heat insulating members in Fig. 3 and subsequent figures.

[0039] The heat insulating material 71 is a heat-resistant fiber, for example, glass felt. Examples of materials of heat-resistant fibers used in the heat insulating material 71 include inorganic fibers such as alumina fibers, mullite fibers, silica fibers, zirconia fibers, alkaline earth metal silicate fibers, glass wool, glass fibers, rock wool, slag wool, silicon carbide fibers, carbon fibers, silica alumina magnesia fibers, silica alumina zirconia fibers, silica magnesia calcia fibers, basalt fibers, and biosoluble inorganic fibers. Examples of organic fibers include aramid fibers, PBO (polyparaphenylene benzobisoxazole) fibers, PPS (polyphenylene sulfide) fibers, and polyimide fibers. Examples of metal fibers include boron fibers, titanium fibers, steel fibers, and stainless steel fibers. The thickness of the heat insulating material 71 is determined according to the device to which the expansion joint 100 is applied, but is usually formed in the range of 20 mm to 100 mm.

[0040] The heat insulating material 71 is wrapped with the first reinforcing material 72. The first reinforcing material 72 is a heat-resistant glass fiber. The first reinforcing material 72 is, for example, a glass cloth. The first reinforcing material 72 has a heat insulating effect and maintains the heat insulating material 71 in a collected shape so that it can be easily attached to the expansion joint 100. The material of the first reinforcing material 72 includes the above-mentioned inorganic fiber and organic fiber similar to the heat insulating material 71. The material of the first reinforcing material 72 may be the same as the material of the heat insulating material 71. The thickness of the first reinforcing material 72 is determined according to the device to which the expansion joint 100 is attached, and is formed to be 0.3 mm to 5 mm. The thickness of the first reinforcing material 72 is preferably 1.5 mm to 2 mm. The first reinforcing material 72 formed in a sheet shape is in a form in which the heat insulating material 71 is wrapped, and the entire length of the ends is connected by sewing or the like.

[0041] In the heat insulating members 61-65, a heat insulating material 71 is wrapped in a first reinforcing material 72, which is further wrapped in a second reinforcing material 73. The second reinforcing material 73 is, for example, a demister. The demister is formed by weaving metal wires into a predetermined shape. The metal wire is determined according to the device to which the expansion joint 100 is attached, but for example, soft stainless steel wire (SUS316L) is used. The wire diameter of the metal wire is 0.1 mm to 0.3 mm, and is preferably φ0.12 mm or φ0.25 mm.

[0042] As described above, the heat insulating members 61 to 65 are formed by wrapping the heat insulating material 71 with the first reinforcing material 72, and further wrapping it with the second reinforcing material 73. The heat insulating members 61 to 65 thus formed are stacked and fixed on the outer circumferential side (atmosphere side) and inner circumferential side (fluid side) of the expansion joint 100. The shapes, thicknesses, and numbers of the heat insulating material 71, the first reinforcing material 72, and the second reinforcing material 73 are appropriately determined according to the device to which the expansion joint 100 is attached. Also, only one of the first reinforcing material 72 and the second reinforcing material 73 wrapping the heat insulating material 71 may be used as necessary depending on the temperature of the fluid, the presence or absence of particulate matter contained in the fluid, and the like.

[0043] The bellows 90 will be described with reference to FIG. 2. The bellows 90 is disposed outside the outermost insulating member 61 and connects the flange members 11 and 21 in a freely expandable manner. The bellows 90 is fixed by sandwiching the entire circumference of both ends of the bellows 90 in a direction parallel to the flow direction X between the second flange parts 18 and 28 of the second frame members 16 and 26 and the mounting fixture 52, respectively. In the embodiment of FIG. 2, the bellows 90 is formed by laminating a plurality of members, for example, PTFE, glass cloth, and SUS-woven glass cloth are laminated in this order from the inner periphery side (fluid side) to the outer periphery side (atmosphere side). Alternatively, the bellows 90 may be formed by any one of the above members.

[0044] 4 to 6 show an apparatus used to attach the heat insulating members 61 to 65 of an expansion joint 100 according to a first embodiment of the present invention, and the method of attachment thereof. In the first embodiment of the present invention, a first jig 80 and a second jig 95 are used when attaching the heat insulating members 62 to 65 having a through hole 78 to the flange members 11 and 21. Note that, in order to make the drawings easier to understand, Figs. 5 to 6 show an example of an expansion joint 100 in which the cross section is formed into a square shape, and the first inner surface portions 14 and 24 are not cylindrical but are shown as a flat portion forming one side of the square shape.

[0045] The first jig 80 will be described with reference to FIG. 4. The first jig 80 is a jig for drilling holes in the heat insulating members 62-65 when attaching the heat insulating members 62-65 to the flange members 11, 21, and is used by engaging with the threaded portions 36 of the first fixing member 31 and the second fixing member 32. The first jig 80 has a first front end portion 81 having a tapered portion 82 on one end side, and a first rear end portion 85 having a connecting portion 86 on the other end side. The portion of the first jig 80 excluding the tapered portion 82 is formed as a cylinder having a circular cross section and a central axis Y with a constant outer diameter. Alternatively, the shape of the portion of the first jig 80 excluding the tapered portion 82 may be a prism, such as a triangular prism, a square prism, a pentagonal prism, or a hexagonal prism, instead of a cylinder.

[0046] In order to easily rotate the first jig 80, a tool engagement portion (not shown) may be formed on the entire circumference of the outer surface of the connection portion 86. The tool engagement portion is a portion to which a tool such as a wrench can be engaged, and is, for example, a hexagonal cross-sectional portion similar to the outer surface of a nut. This allows the first jig 80 to be rotated by engaging a tool such as a wrench, an electric tool, or an air tool with the tool engagement portion on the outer surface of the first jig 80 when the rotation resistance is large or when it is desired to rotate the first jig quickly. The tool engagement portion is provided at any position of the first jig 80 except for the tapered portion 82. In particular, it can be provided on the outer surface of the first jig 80 adjacent to the tapered portion 82 so that tools can be easily attached and detached during the steps of this installation method.

[0047] In addition, in order to easily rotate and remove the first jig 80 by hand, a non-slip portion (not shown) may be provided on the outer circumferential surface of the connection portion 86. The non-slip portion may be formed by forming fine irregularities on the surface by knurling, blasting, etching, laser processing, pressing, spraying, plating, micro-hole processing, marking, etc., applying a non-slip paint containing fine irregular particles or a resin with high friction, providing a groove with a recess in the circumferential direction of the outer circumferential portion of the connection portion 86 and fitting a rubber or resin O-ring, band, tape, etc. into the groove, or by a combination of these methods, so that the first jig 80 is formed into a shape that makes it difficult for the first jig 80 to slip when attaching or removing the first jig 80. Furthermore, by utilizing the fact that the non-slip portion has a different appearance from the non-slip portion on the outer circumferential portion of the connection portion 86, the appearance of the non-slip portion may be made into a symbol, number, or barcode shape, or the color of the O-ring or resin may be changed, thereby making it possible to distinguish the dimensions and shape of the first jig 80, thereby further improving workability.

[0048] The connecting portion 86 has an opening 87 at the rear end of the other end of the first jig 80, and a hollow portion 88 extending from the opening 87 to the first tip portion 81 side of the first jig 80. The hollow portion 88 is provided from the first rear end portion 85 to the vicinity of the center of the first jig 80. The inner diameter of the hollow portion 88 is constant over the entire length of the hollow portion 88. As shown in FIG. 5, a threaded portion 36 is provided on the outer surface of the fixing member tip portion 35, which is the tip portion of the first and second fixing members 31 and 32. In addition, a threaded portion 89 corresponding to the threaded portion 36 of the fixing member tip portion 35 is provided on the inner peripheral surface of the hollow portion 88 over the entire length of the hollow portion 88. The first jig 80 is fixed to the fixing member tip portions 35 of the first and second fixing members 31 and 32 by the threaded portion 89 of the first jig 80.

[0049] Alternatively, the inner peripheral surface of the hollow portion 88 may be formed as a smooth inner peripheral surface instead of the threaded portion 89, and the fixing member tip portion 35 may be inserted into the hollow portion 88 of the first jig 80. In that case, the inner diameter of the hollow portion 88 is formed slightly larger than the outer diameter of the fixing member tip portion 35, and a dimensional relationship is formed such that the fixing member tip portion 35 can be smoothly inserted into the hollow portion 88. The fixing member tip portion 35 is inserted into the hollow portion 88 and abuts against the inner wall surface at the back of the hollow portion 88, and the first jig 80 is held by the first fixing member 31 or the second fixing member 32.

[0050] The outer diameter of the first jig 80 is formed to a dimension that includes a necessary thickness with respect to the outer diameter of the threaded portions formed in the first and second fixing members 31, 32. For example, the outer diameter is formed to include a thickness of about 1 mm to 3 mm on one side with respect to the inner diameter of the hollow portion 88.

[0051] The tapered portion 82 formed on the first tip portion 81 of the first jig 80 has a tapered tip portion 83 on the tip side of the first tip portion 81, and a tapered base end portion 84 on the opposite side of the tapered tip portion 83 of the first jig 80. The tapered portion 82 is formed by continuously or intermittently reducing in diameter from the tapered base end portion 84 to the tapered tip portion 83, and the outer dimension D of the tapered tip portion 83 in a direction perpendicular to the longitudinal direction of the first jig 80 is formed smaller than the outer dimension of the fixing member tip portion 35 in a direction perpendicular to the longitudinal direction of the first and second fixing members 31 and 32. The tapered tip portion 83 is formed in a pointed shape, and the tapered portion 82 is in a cone shape. The tapered tip portion 83 is formed as a tip portion where the outer dimension D of the tapered portion 82 is gradually reduced like the tip of a cone. Since the first tip 81 of the first jig 80 is formed sharp, the pressing force of an impact tool N such as a hammer is applied concentratedly to the heat insulating members 62-65. Since the first tip 81 is sharp, the tapered tip 83 can be inserted into holes in the mesh of the second reinforcing material 73 on the outer surface of the heat insulating members 62-65, and the through holes 78 can be formed so that the mesh is expanded by the pressing force of the impact tool N. Therefore, the through holes 78 can be easily provided in the heat insulating members 62-65.

[0052] Alternatively, the tapered tip portion 83 may have an end surface formed from a flat surface, instead of a sharp shape. That is, the tapered portion 82 may have a truncated cone shape instead of a cone shape. The outer dimension D of the tapered tip portion 83 is formed smaller than the outer dimension of the tapered base end portion 84 in a direction perpendicular to the longitudinal direction of the first jig 80 and the outer dimension of the fixing member tip portion 35 in a direction perpendicular to the longitudinal direction of the first and second fixing members 31 and 32. Therefore, when drilling holes in the heat insulating members 62 to 65, the pressing force of the impact tool N is concentrated on the end face of the tapered tip portion 83, so that the impact effect can be improved. Therefore, the through hole 78 can be easily formed in the heat insulating members 62 to 65. The outer dimension D of the tapered tip portion 83 may be smaller than the outer dimension of the fixing member tip portion 35 in a direction perpendicular to the longitudinal direction of the first and second fixing members 31 and 32. When the outer dimension D is the same as the outer dimension of the tip portion 35 of the fixing member in a direction perpendicular to the longitudinal direction of the first and second fixing members 31, 32, effects such as protecting the threaded portion 36 and preventing the insulating members 62-65 from becoming entangled with the threaded portion 36 can be obtained.

[0053] Alternatively, the tapered tip 83 may be formed with a curved surface instead of a pointed shape. That is, the tapered portion 82 may be a cone shape in which the tapered tip 83 is formed with a curved surface. In this case, the outer dimension of the tapered tip 83 is formed smaller than the outer dimension of the tapered base end 84 and the fixing member tip 35 in a direction perpendicular to the longitudinal direction of the first and second fixing members 31 and 32. When drilling holes in the heat insulating members 62 to 65, the pressing force of the impact tool N is concentrated on the tapered tip 83, so that the impact effect can be improved. Therefore, the through hole 78 can be easily provided in the heat insulating members 62 to 65. The outer dimension D of the tapered tip 83 may be smaller than the outer dimension of the fixing member tip 35 in a direction perpendicular to the longitudinal direction of the first and second fixing members 31 and 32. When the outer dimension D is the same as the outer dimension of the tip portion 35 of the fixing member in a direction perpendicular to the longitudinal direction of the first and second fixing members 31, 32, effects such as protecting the threaded portion 36 and preventing the insulating members 62-65 from becoming entangled with the threaded portion 36 can be obtained.

[0054] Further, the tapered portion 82 may be formed in a pyramidal shape, such as a triangular pyramid, a square pyramid, a pentagonal pyramid, a hexagonal pyramid, or the like, instead of being formed as a cone shape with a circular cross section. That is, the tapered portion 82 may be formed in a pyramidal shape in which the outer dimension D of the first jig 80 is continuously or intermittently reduced from the tapered base end 84 toward the tapered tip end 83. When the tapered portion 82 is pyramidal, the tapered tip end 83 may be any of a pointed shape, a shape including a curved surface, and a shape including a flat surface, as described above. In any of the above cases, the outer dimension D of the tapered tip end 83 is formed smaller than the outer dimension of the tapered base end 84 in the direction perpendicular to the longitudinal direction of the first jig 80 and the outer dimension of the fixing member tip end 35 in the direction perpendicular to the longitudinal direction of the first and second fixing members 31 and 32. Therefore, the pressing force of the impact tool N is concentrated and applied to the heat insulating members 62 to 65, thereby enhancing the impact effect. Therefore, the through holes 78 can be easily provided in the heat insulating members 62 to 65. The outer dimension D of the tapered tip portion 83 may be equal to or smaller than the outer dimension of the fixing member tip portion 35 in the direction perpendicular to the longitudinal direction of the first and second fixing members 31, 32. When the outer dimension D is the same as the outer dimension of the fixing member tip portion 35 in the direction perpendicular to the longitudinal direction of the first and second fixing members 31, 32, effects such as protection of the threaded portion 36 and prevention of the heat insulating members 62 to 65 from becoming entangled with the threaded portion 36 can be obtained.

[0055] The second jig 95 will be described with reference to FIG. 6. The second jig 95 is a jig used together with the first jig 80 when attaching the heat insulating members 62 to 65 to the first fixing member 31 and the second fixing member 32. The second jig 95 is formed of a tubular member having at least one end open and a hollow portion 98 therein. The inner dimension of the hollow portion 98 is formed larger than the outer dimension of the first jig 80. Therefore, at least the tapered portion 82 of the first jig 80 can be inserted. The second jig 95 is, for example, a hollow metal tube open at both ends.

[0056] A method for attaching the heat insulating member in the present embodiment 1 will be described with reference to Figures 5 and 6. In the following description, a case will be described in which heat insulating member 63 is attached to first fixing member 31 of flange member 11. The attachment method described below is the same in other cases. That is, it is the same in the case in which heat insulating member 62 is attached instead of heat insulating member 63, in the case in which heat insulating member 62 is attached to first fixing member 31 of flange member 21 instead of first fixing member 31 of flange member 11, and in the case in which heat insulating member 64 or 65 is attached to second fixing member 32 of flange member 11 or flange member 21.

[0057] [Jig installation process] Fig. 5 shows the jig attachment process. Fig. 5 is a perspective view of the upstream first fixing member 31 as viewed obliquely from above the downstream flange member 21. In the jig attachment process, the connection portion 86 of the first jig 80 is connected to the first fixing member 31. The threaded portion 89 on the inner peripheral surface of the hollow portion 88 of the connection portion 86 of the first jig 80 is engaged with the threaded portion 36 on the outer peripheral surface of the fixing member tip portion 35 of the first fixing member 31 to be fixed. By engaging the first jig 80 with the threaded portion 36 of the fixing member tip portion 35, the soundness of the threaded portion 36, such as whether the threaded portion 36 is damaged, can be checked.

[0058] [Hole processing process] FIG. 6 shows a hole processing step. The tapered portion 82 of the first jig 80 is placed at a predetermined position on one side of the heat insulating member 63, and a second rear end portion 97 of a second jig 95 formed of a hollow tube is pressed against the second rear end portion 97 so as to surround the intersection between a line parallel to the central axis Y of the first jig 80 passing through the tapered portion 82 and the other side of the heat insulating member 63. A pressing force is applied to a second front end portion 96 of the second jig 95 with an impact tool N such as a hammer, and the first jig 80 forms a through hole 78 in the heat insulating member 63, and the first fixing member 31 with the first jig 80 attached penetrates the heat insulating member 63. According to the above hole processing method, a hole with a constant hole diameter is obtained, and a through hole 78 larger than necessary is not opened. Therefore, the size of the through hole 78 is minimized, and the possibility of heat leakage from the through hole of the heat insulating member 62 to 65 is reduced. In addition, the possibility of damage spreading from an excessively large through hole 78 during the use of the heat insulating member 62 to 65 used for a long period of time is reduced.

[0059] As a variation of the above method, without using the second jig 95, a pressing force may be applied directly with an impact tool N such as a hammer around the intersection between a line parallel to the central axis Y of the first jig 80 passing through the tapered portion 82 and the other surface of the heat insulating member 63, so that the first fixing member 31 with the first jig 80 attached thereto penetrates the heat insulating member 63. The impact tool N may be an impact tool powered by electricity or air pressure. In this case, the impact tool N may be used by fitting the second tip portion 96 of the second jig 95 to it.

[0060] [Jig removal process] Once the holes have been drilled and the first fixing members 31 have penetrated the through holes 78, the first jig 80 is rotated and removed from each of the first fixing members 31 that are inserted into the through holes 78. Thereafter, the heat insulating members 62 are attached in the same manner as above, and a washer 92 and a tie band 93, which are holding members, are attached to the fixing member tip portion 35 of each first fixing member 31, and the heat insulating members 62, 63 are fixed to the first frame member 13 by tightening with a nut.

[0061] The second reinforcing member 73 is made of a metal wire having high strength. Therefore, the first embodiment is particularly effective when the heat insulating members 62-65 are formed by adding the heat insulating material 71 to the first reinforcing member 72 and wrapping it with the second reinforcing member 73. Therefore, the first embodiment is particularly useful when mounting the heat insulating members 62-65 having the heat insulating material 71, the first reinforcing member 72, and the second reinforcing member 73. The mounting method is the same as above in the case of the heat insulating members 62, 64, 65 other than the heat insulating member 63, the flange member 21, the second fixing member 32, and the combinations thereof. The first jig 80 can be used repeatedly, and the first jig 80 and the second jig 95 once manufactured can be used semi-permanently, so that the jig manufacturing cost can be reduced. The above mounting method can reduce the work time to about 2 / 3 compared to the conventional method. Therefore, according to the present invention, the work man-hours can be significantly reduced, the construction period can be shortened, and the number of workers involved can be reduced.

[0062] <Embodiment 2> A first jig 110 according to the second embodiment will be described with reference to FIG. 7. The first jig 110 is different from the first jig 80 according to the first embodiment in that it is composed of a plurality of members. The method of attaching the heat insulating member using the first jig 110 is the same as that of the first jig 80 according to the first embodiment. The first jig 110 has a first tip portion 81 on one end side and a first rear end portion 85 on the other end side. The first jig 110 also has a tapered portion 111 on the first tip portion 81 side and a connecting portion 116 on the first rear end portion 85 side. Both are formed of different members, and are integrally assembled with their central axis Y being coaxial to form the first jig 110.

[0063] The tapered portion 111 has a first tapered portion 112 formed on the first tip portion 81 side of the tapered portion 111, a third tapered portion 114 formed on the second rear end portion 85 side of the tapered portion 111, and a second tapered portion 113 formed between the first tapered portion 112 and the third tapered portion 114.

[0064] The first tapered portion 112 has a tapered tip portion 83 at the tip side of the first tip portion 112, and a tapered base end portion 84 on the opposite side of the tapered tip portion 83 of the first jig 110. The first tapered portion 112 is formed such that the outer dimension D in the direction perpendicular to the longitudinal direction of the first jig 110 is continuously or intermittently reduced from the tapered base end portion 84 toward the tapered tip portion 83, and the outer dimension D of the tapered tip portion is formed smaller than the outer dimension of the fixing member tip portion 35 in the direction perpendicular to the longitudinal direction of the first and second fixing members 31 and 32. The tapered tip portion 83 is pointed, and the first tip portion 112 is formed in a cone shape. The tapered tip portion 83 is formed as a point where the outer dimension D of the first tapered portion 112 is gradually reduced like the tip of a cone.

[0065] Alternatively, the tapered tip portion 83 may have an end surface formed from a flat surface, rather than a pointed shape. That is, the first tapered portion 112 may have a truncated cone shape rather than a cone shape. Alternatively, the tapered tip portion 83 may be formed to include a curved surface. That is, the first tapered portion 112 may have a cone shape in which the tapered tip portion 83 is formed to include a curved surface. The outer dimension D of the tapered tip portion 83 may be equal to or smaller than the outer dimension of the fixing member tip portion 35 in the direction perpendicular to the longitudinal direction of the first and second fixing members 31 and 32. When the outer dimension D is the same as the outer dimension of the fixing member tip portion 35 in the direction perpendicular to the longitudinal direction of the first and second fixing members 31 and 32, effects such as protection of the threaded portion 36 and prevention of entanglement of the heat insulating members 62 to 65 with the threaded portion 36 can be obtained.

[0066] Alternatively, the cross section of the first tapered portion 112 may not be a circular cone shape, but may be a polygonal pyramid shape, such as a triangular pyramid, a square pyramid, a pentagonal pyramid, or a hexagonal pyramid.

[0067] The second tapered portion 113 is a cylindrical member that connects the first tapered portion 112 and the third tapered portion 114. The second tapered portion 113 and the connecting portion 116 are formed to have approximately the same outer dimensions in a direction perpendicular to the longitudinal direction of the first jig 110, and their outer surfaces are connected without any steps.

[0068] The third tapered portion 114 is a portion where the tapered portion 111 is connected to the connection portion 116. The outer dimension of the third tapered portion 114 in a direction perpendicular to the longitudinal direction of the first jig 110 is approximately the same as the inner diameter of the hollow portion 88 of the connection portion 116. A threaded portion 115 is formed on the outer surface of the third tapered portion 114.

[0069] The connecting part 116 is a cylindrical member having openings 119, 119 at a front end 117 on one end side and a rear end 118 on the other end side, respectively, and a hollow part 88 that communicates with both openings 119, 119. The connecting part 116 has a threaded part 89 on the inner surface of the hollow part 88, and the threaded part 115 of the third tapered part 114 is connected to the opening 119 at the front end 117 of the connecting part 116. The opening 119 at the rear end 118 of the connecting part 116 can be connected to the threaded part 36 of the first fixing member 31 or the second fixing member 32. The opening 119 at the front end 117 of the connecting part 116 and the opening 119 at the rear end 118 of the connecting part 116 have the same inner diameter, and the threaded part 89 is constant over the entire length of the threaded part 89. Alternatively, the inner diameter of opening 119 at front end 117 and the inner diameter of opening 119 at rear end 118 may be formed to be different depending on the outer diameter of the members to be connected to each other.

[0070] At least one of the second tapered portion 113 and the connecting portion 116 may be formed in a prismatic shape, such as a triangular prism, a quadrangular prism, a pentagonal prism, or a hexagonal prism, rather than a cylindrical shape.

[0071] In order to easily rotate the first jig 110, a tool engagement portion (not shown) may be formed on at least a part of the outer surface of either or both of the second tapered portion 113 and the connecting portion 116. The tool engagement portion is a portion to which a tool such as a wrench, an electric tool, an air tool, etc. can be engaged, and is, for example, a portion having a hexagonal cross-sectional shape similar to the outer surface of a nut. In order to easily rotate and attach / detach the first jig 110 by hand, an anti-slip portion (not shown) may be provided on the outer surface of at least one of the second tapered portion 113 and the connecting portion 116.

[0072] The first jig 110 does not include a blind hole that is time-consuming to machine, and therefore can be easily formed. Therefore, the first jig 110 can be formed more inexpensively.

[0073] 8, as a modification of the second embodiment, the tapered portion 121 may not include the second tapered portion 113, and the first member 120 may be formed by directly connecting the first tapered portion 112 and the third tapered portion 114. Since the tapered portion 121 does not include the second tapered portion 113, the outer dimensions and length dimensions can be reduced. Therefore, the first jig 120 can be formed more inexpensively.

[0074] The method for installing a heat insulating material of the present invention can be applied to the installation of heat insulating members fixed by rod-shaped fixing members such as stud bolts to walls of buildings, structural members, etc., other than expansion joints.

[0075] According to the present invention, it is possible to provide a method and an apparatus for easily attaching a heat insulating member provided in an expansion joint. [Explanation of symbols]

[0076] 31 first fixing member, 32 second fixing member, 35 fixing member tip portion, 36 threaded portion, 61 to 65 heat insulating member, 78 through hole, 80, 110, 120 first jig, 82, 111, 121 tapered portion, 83 tapered tip portion, 84 tapered base end portion, 86, 116 connection portion, 87, 119 opening portion, 88 hollow portion, 89 threaded portion, 95 second jig, 100 expansion joint.

Claims

1. A jig set comprising a first jig and a second jig used together with the first jig, The first jig is a first jig used when fixing a heat insulating member to a fixing member provided on a member, The fixing member is formed in a rod shape, and a fixing member tip portion is provided at a tip portion of the fixing member, the first jig has a tapered portion formed by including one end of the first jig and a connection portion formed by including the other end of the first jig, the tapered portion has a tapered tip portion which is a distal end portion of the tapered portion and a tapered base portion which is a base end portion of the tapered portion, the connection portion has at least an opening provided in an end surface of the other end, and a hollow portion extending from the opening toward the one end and formed inside the connection portion, the connection portion is formed on an inner circumferential surface of the hollow portion and includes a threaded portion corresponding to a threaded portion provided on an outer circumferential surface of the tip portion of the fixing member, The tapered portion is formed such that an outer dimension of the tapered portion in a direction perpendicular to a longitudinal direction of the first jig is continuously or intermittently reduced from the tapered base end portion to the tapered tip portion, an outer dimension of the tapered tip portion in a direction perpendicular to the longitudinal direction of the first jig is smaller than an outer dimension of the tip portion of the fixing member in a direction perpendicular to the longitudinal direction of the fixing member, The second jig has at least one end open and has a hollow space therein, The hollow portion is a cylindrical member formed so that at least the tapered portion of the first jig can be inserted therein. A jig set including the first jig and the second jig.

2. A jig set as described in Claim 1, wherein the tapered tip portion of the first jig is formed into a pointed shape or a shape including a curved surface.

3. A method for attaching the heat insulating member to the member using the jig set according to claim 1 or 2, comprising the steps of: a jig attachment step of attaching the first jig to a tip end of the fixing member; a hole processing step of placing a predetermined position on one side of the heat insulating member against a tapered portion of the first jig, and applying a pressing force with an impact tool around an intersection between a line passing through the tapered portion and a central axis line of the first jig and the other side of the heat insulating member, thereby forming a through hole in the heat insulating member with the first jig, and making the fixing member to which the first jig is attached penetrate the heat insulating member; and a jig removing step of removing the first jig attached to the tip portion of the fixing member, A method for installing an insulating member, in which, in the hole machining process, one end of the second jig is pressed against the opening so that the intersection of a line parallel to the central axis of the first jig passing through the tapered portion and the other side of the insulating member is surrounded by the opening, and a pressing force is applied to the other end of the second jig with an impact tool, thereby forming a through hole in the insulating member using the first jig and causing the fixing member to which the first jig is attached to penetrate the insulating member.

4. A jig set comprising a first jig and a second jig used together with the first jig, The first jig is A first jig used when fixing a heat insulating member to a fixing member provided on a member, The fixing member is formed in a rod shape, and a fixing member tip portion is provided at a tip portion of the fixing member, the first jig has a tapered portion formed by including one end of the first jig and a connection portion formed by including the other end of the first jig, the tapered portion has a tapered tip portion which is a distal end portion of the tapered portion and a tapered base portion which is a base end portion of the tapered portion, the connection portion has at least an opening provided in an end surface of the other end, and a hollow portion extending from the opening toward the one end and formed inside the connection portion, the connection portion is formed on an inner circumferential surface of the hollow portion and includes a threaded portion corresponding to a threaded portion provided on an outer circumferential surface of the tip portion of the fixing member, The tapered portion is formed such that an outer dimension of the tapered portion in a direction perpendicular to a longitudinal direction of the first jig is continuously or intermittently reduced from the tapered base end portion to the tapered tip portion, an outer dimension of the tapered tip portion in a direction perpendicular to the longitudinal direction of the first jig is formed to be the same as an outer dimension of the tip portion of the fixing member in a direction perpendicular to the longitudinal direction of the fixing member, The second jig has at least one end open and has a hollow space therein, The hollow portion is a cylindrical member formed so that at least the tapered portion of the first jig can be inserted therein. A jig set including the first jig and the second jig.

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