Fixing device and fixing method

Abstract

To fix an object such as a sensor probe to a surface material that is difficult to weld.SOLUTION: A fixing device for fixing an object to a surface material constituting a wall of a liquefied gas tank or to a surface material of a heat insulating panel surrounding the liquefied gas tank comprises: a stud having a bolt part, and a seat part including a back surface bonded to a face material with an electrically insulating adhesive and a surface from which the bolt part stands; a fixing plate having an insertion hole through which the bolt part of the stud is passed, and to which the object is fixed; and a nut that is screwed into the bolt part of the stud, and prevents the fixing plate from falling off from the bolt part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a technique for fixing an object to a facing material.

Background Art

[0002] Conventionally, as a method for fixing a sensor probe for detecting the temperature inside a tank to the tank, there are known methods such as screwing the sensor into a plug pre-welded to the tank, or screwing the sensor to a fitting and then welding or screwing the fitting to the tank. Such a method for fixing a sensor probe to a tank is disclosed in Patent Document 1.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A liquefied gas tank for storing a cryogenic liquefied gas such as LNG or liquefied hydrogen is provided with a heat insulation structure on the surface of the tank in order to maintain the low temperature of the liquefied gas. As an example of the heat insulation structure, there is panel heat insulation in which the tank is covered with a panel-shaped heat insulating material. The surface of the panel-shaped heat insulating material may be covered with a resin film, and it is difficult to fix a sensor probe by welding on such a resin surface. In addition, some liquefied gas tanks have a surface made of aluminum. On such an aluminum surface, higher welding techniques are required compared to stainless steel or iron, and it is difficult to fix a sensor probe by welding.

[0005] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a technique for fixing an object such as a sensor probe to a facing material where welding is difficult.

Means for Solving the Problems

[0006] In order to solve the above problems, a fixing device according to one aspect of the present disclosure is a fixing device for fixing an object to a facing material constituting the wall of a liquefied gas tank or a facing material of a heat insulating panel surrounding the liquefied gas tank, and a stud having a bolt portion and a seat portion including a back surface adhered to the facing material with an electrically insulating adhesive and a surface on which the bolt portion stands up, a fixing plate having an insertion hole through which the bolt portion of the stud passes and to which the object is fixed, and a nut screwed with the bolt portion of the stud to prevent the fixing plate from falling off from the bolt portion.

[0007] A fixing method according to another aspect of the present disclosure is a method for fixing an object to a facing material constituting the wall of a liquefied gas tank or a facing material of a heat insulating panel surrounding the liquefied gas tank, and adhering the seat portion of a stud having a bolt portion and a seat portion to the facing material with an electrically insulating adhesive, fixing the object to the fixing plate, and including passing the fixing plate and the nut through the bolt portion to prevent the fixing plate from falling off from the bolt portion.

Advantages of the Invention

[0008] According to the present disclosure, a technique for fixing an object such as a sensor probe to a facing material where welding is difficult can be proposed.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0010] Next, the first to third embodiments of the present disclosure will be described with reference to the drawings.

[0011] 〔First Embodiment〕 FIG. 1 is a schematic front view of a fixing device 1 according to the first embodiment of the present disclosure, and FIG. 2 is a plan view of the facing material 10 of FIG. 1. The fixing device 1 shown in FIGS. 1 and 2 is for fixing an object 2 to a facing material 10 that is difficult to weld. In the present embodiment, the facing material 10 is a panel-shaped heat insulating material surrounding a liquefied gas tank, and the object 2 is a probe 20 of a temperature sensor that detects the temperature of the panel-shaped heat insulating material. However, the facing material 10 to which the fixing device 1 according to the first embodiment is applied is not limited to a resin-made facing material 10 such as a panel-shaped heat insulating material, and may be an aluminum-made facing material 10 such as the surface of a tank. Further, the object 2 fixed to the facing material 10 by the fixing device 1 according to the first embodiment is not limited to the probe 20 of the temperature sensor, and may be a probe of a sensor other than the temperature sensor, such as a probe of a strain sensor or an acceleration sensor.

[0012] The fixing device 1 includes a stud 3 adhered to the facing material 10 and a fixing plate 4 attached to the stud 3. In the fixing device 1 illustrated in FIGS. 1 and 2, the studs 3 are arranged at both longitudinal ends of the fixing plate 4. However, the number of studs 3 included in the fixing device 1 is not limited to two, and may be three or more according to the shape and mass of the object 2 and the shape of the fixing plate 4.

[0013] The stud 3 integrally has a seat portion 31 with a flat back surface and a bolt portion 32 standing up from the surface of the seat portion 31. The stud 3 is made of a metal having low-temperature resistance such as stainless steel. The back surface of the seat portion 31 is fixed to the facing material 10 by an adhesive 22. The adhesive 22 has low-temperature resistance capable of withstanding the low temperature of the liquefied gas tank and electrical insulation for blocking the flow of electricity from the facing material 10 to the stud 3. An epoxy-based adhesive is cited as a non-limiting example of such an adhesive 22.

[0014] The fixing plate 4 is a plate-shaped member extending parallel to the facing material 10. The fixing plate 4 is made of a metal having low-temperature resistance such as stainless steel. Insertion holes 41 through which the bolt portions 32 of the studs 3 are passed are provided at both longitudinal ends of the fixing plate 4. The probe 20 is adhered to the central portion in the longitudinal direction of the fixing plate 4 by an adhesive 23. The adhesive 23 has low-temperature resistance capable of withstanding the low temperature of the liquefied gas tank and electrical insulation for blocking the flow of electricity from the facing material 10 to the stud 3.

[0015] FIG. 3 is an assembly view of the fixing device 1 in FIG. 1. As shown in FIGS. 1 and 3, a spacer 37, a fixing plate 4, a spring washer 36, and a nut 38 are sequentially passed through the bolt portion 32 of the stud 3. The thickness of the spacer 37 is smaller than the thickness of the probe 20, and the detection surface (the lower surface in FIG. 1) of the probe 20 is in contact with the facing material 10. Then, due to the elastic force of the spring washer 36 and the fastening force of the nut 38, the detection surface of the probe 20 is pressed against the facing material 10. Instead of the spring washer 36, a double nut may be used.

[0016] In the fixing device 1 configured as described above, the probe 20 of the temperature sensor is not directly adhered to the surface material 10 to be detected. Instead, the fixing device 1 that holds the probe 20 so as to contact the surface material 10 is adhered to the surface material 10. In this way, by using the adhesive 22, the probe 20 can be fixed to the surface material 10 for which welding is difficult. For fixing the probe 20, welding and machining (except for sanding) are unnecessary, and it can be used in a space where the use of fire is restricted. Moreover, the surface shape and characteristics of the surface material 10 do not change.

[0017] Also, according to the fixing device 1 configured as described above, the probe 20 of the temperature sensor is not adhered to the surface material 10, and the probe 20 is in direct contact with the surface material 10 to be detected. Thereby, compared with the case where an adhesive intervenes between the surface material 10 and the probe 20, the temperature of the detection target can be detected more accurately, and the detection response speed is also good.

[0018] Also, according to the fixing device 1 configured as described above, the surface material 10 and the stud 3 are electrically insulated by the adhesive 22, and the probe 20 and the fixing plate 4 are electrically insulated by the adhesive 23. That is, the probe 20 and the fixing device 1 are electrically insulated. Thereby, the disturbance given by the fixing device 1 to the probe 20 is suppressed, and the detection accuracy of the probe 20 can be improved.

[0019] Furthermore, according to the fixing device 1 configured as described above, the probe 20 is pressed against the surface material 10 by the elastic force of the spring washer 36, that is, an elastic body. Therefore, even if vibration or thermal shrinkage occurs in the surface material 10, the state in which the probe 20 is in contact with the surface material 10 is maintained. Thereby, stable temperature detection can be performed.

[0020] [Second Embodiment] Next, the second embodiment will be described. FIG. 4 is a schematic front view of a fixing device 1A according to the second embodiment of the present disclosure, and FIG. 5 is a plan view of the fixing device 1A in FIG. 4. In the description of the present embodiment, the same or similar members as those in the foregoing embodiment are denoted by the same reference numerals in the drawings, and detailed description thereof is omitted.

[0021] The fixing device 1A shown in FIGS. 4 and 5 is for fixing the object 2 to the facing material 10 where welding is difficult. In the present embodiment, the facing material 10 is the tank wall of a liquefied gas tank, and the object 2 is a pipe 21 penetrating the tank wall of the liquefied gas tank. However, the facing material 10 to which the fixing device 1A according to the second embodiment is applied is not limited to the aluminum facing material 10 of the tank wall of the liquefied gas tank, and may be a resin facing material 10 such as the surface of a heat insulating panel. Further, the object 2 fixed to the facing material 10 is not limited to the pipe 21, and may be a cable or a rod-shaped sensor probe of various sensors. Thus, the fixing device 1A according to the present embodiment is used for fixing a long object penetrating the tank wall to the tank wall.

[0022] The fixing device 1A includes a stud 3 adhered to the facing material 10 with an adhesive 22 and a fixing plate 4 attached to the stud 3. In the example shown in FIGS. 4 and 5, studs 3 are arranged at both longitudinal ends of the fixing plate 4.

[0023] The fixing plate 4 integrally has a plate-shaped main body 40 extending parallel to the facing material 10 and a pipe support portion 42 standing up from the main body 40 in a direction away from the facing material 10. Insertion holes 41 through which the bolt portions 32 of the studs 3 are passed are provided at both longitudinal ends of the main body 40.

[0024] A resin mount material 45 is adhered to the pipe support portion 42 of the fixing plate 4 with an adhesive 25. The adhesive 25 and the mount material 45 have low-temperature resistance capable of withstanding the low temperature of the liquefied gas tank, electrical insulation for blocking the flow of electricity from the fixing plate 4 to the pipe 21, and heat insulation for blocking the flow of heat. The mount material 45 has a loop through which a bundling tool 43 is passed, and the mount material 45 and the pipe 21 are bundled by the bundling tool 43 passed through the loop. Note that the shape of the mount material 45 is not limited to the present embodiment, and the mount material 45 preferably has a shape corresponding to the object 2 so that the object 2 can be fixed.

[0025] The bolt portion 32 of the stud 3 has a fixing plate 4, a spring washer 36, and a nut 38 passed through it in that order. A spacer may be inserted between the seat portion 31 of the stud 3 and the fixing plate 4. Due to the elastic force of the spring washer 36 and the fastening force of the nut 38, even if thermal shrinkage or vibration occurs in the facing material 10, the relative positional relationship between the facing material 10 and the fixing plate 4 is maintained. A double nut may be used instead of the spring washer 36.

[0026] 〔Third Embodiment〕 Next, the third embodiment will be described. FIG. 6 is a schematic front view of a fixing device 1B according to the third embodiment of the present disclosure, and FIG. 7 is a plan view of the fixing device 1B of FIG. 6. In the description of the present embodiment, members that are the same as or similar to those in the foregoing embodiments are denoted by the same reference numerals in the drawings, and detailed descriptions thereof are omitted.

[0027] The fixing device 1B shown in FIGS. 6 and 7 is for fixing the object 2 to the facing material 10 that is difficult to weld. In the present embodiment, the facing material 10 is the tank wall of a liquefied gas tank, and the object 2 is a pipe 21 laid parallel to the tank wall of the liquefied gas tank. However, the facing material 10 to which the fixing device 1B according to the third embodiment is applied is not limited to the aluminum-made facing material 10 of the tank wall of the liquefied gas tank, and may be a resin-made facing material 10 such as the surface of a heat insulating panel.

[0028] The fixing device 1B includes a stud 3 adhered to the facing material 10 with an adhesive 22 and a fixing plate 4 attached to the stud 3. In the example shown in FIGS. 6 and 7, studs 3 are arranged at both longitudinal ends of the fixing plate 4.

[0029] The fixing plate 4 is formed by shaping a metal plate material into a hat shape. Insertion holes 41 through which the bolt portions 32 of the studs 3 are passed are provided at both longitudinal ends of the fixing plate 4. The central portion in the longitudinal direction of the fixing plate 4 is a base portion 44 that is farther from the facing material 10 than the portion where the insertion holes 41 are provided. A resin mount material 48 is adhered to the base portion 44 by an adhesive 24. The adhesive 24 and the mount material 48 have low-temperature resistance capable of withstanding the low temperature of the liquefied gas tank, electrical insulation that blocks the flow of electricity from the fixing plate 4 to the pipe 21, and thermal insulation that blocks the flow of heat. The mount material 48 has a loop through which a bundling tool 46 is passed, and the mount material 45 and the pipe 21 are bundled by the bundling tool 46 passed through the loop.

[0030] The bolt portion 32 of the stud 3 is sequentially passed through the fixing plate 4, a spring washer 36, and a nut 38. A spacer may be inserted between the seat portion 31 of the stud 3 and the fixing plate 4. Due to the elastic force of the spring washer 36 and the fastening force of the nut 38, even if thermal contraction or vibration occurs in the tank wall, the relative positional relationship between the facing material 10 and the fixing plate 4 is maintained.

[0031] 〔Summary〕 The fixing devices 1, 1A, 1B according to the first aspect of the present disclosure are fixing devices 1, 1A, 1B for fixing an object 2 to a facing material 10 constituting the wall of a liquefied gas tank or a facing material 10 of a heat insulation panel surrounding the liquefied gas tank, a stud 3 having a bolt portion 32 and a seat portion 31 including a back surface adhered to the facing material 10 with an electrically insulating adhesive 22 and a surface on which the bolt portion 32 stands up, a fixing plate 4 having an insertion hole 41 through which the bolt portion 32 of the stud 3 is passed and to which the object 2 is fixed, and a nut 38 that is screwed with the bolt portion 32 of the stud 3 and prevents the bolt portion 32 from falling off the fixing plate 4.

[0032] According to the fixing devices 1, 1A, and 1B having the above configuration, the fixing devices 1, 1A, and 1B holding the object 2 are adhered to the surface material 10, whereby the object 2 is fixed to the surface material 10. In this way, the object 2 can be fixed to the surface material 10 for which welding is difficult. For fixing the object 2, welding and machining other than sanding (for example, drilling, etc.) are unnecessary, and it can be used in a space where the use of fire is restricted. Moreover, the surface shape and characteristics of the surface material 10 do not change.

[0033] The fixing device 1 according to the second aspect of the present disclosure is the fixing device 1 according to the first aspect, wherein the object 2 is disposed between the surface material 10 and the fixing plate 4, and the object 2 is adhered to the fixing plate 4 with an adhesive 23 having electrical insulation properties and is in direct contact with the surface material 10.

[0034] According to the fixing device 1 having the above configuration, the object 2 can be brought into direct contact with the surface material 10. Thereby, when the object 2 is the probe 20, the detection of the detection target can be performed more accurately as compared with the case where an adhesive is interposed between the object 2 and the surface material 10.

[0035] The fixing device 1 according to the third aspect of the present disclosure further includes an elastic body 36 disposed between the fixing plate 4 and the nut 38 in the fixing device 1 according to the first or second aspect.

[0036] According to the fixing device 1 having the above configuration, the object 2 can be brought into a state of being press - contacted with the surface material 10. Thereby, even if thermal shrinkage or vibration occurs in the surface material 10, the contact between the object 2 and the surface material 10 can be maintained.

[0037] The fixing device 1 according to the fourth aspect of the present disclosure is the fixing device 1 according to any one of the first to third aspects, wherein the object 2 is the probe 20 of the sensor.

[0038] The fixing device 1 having the above configuration is suitable for fixing the probe 20 to the surface material 10 for which welding is difficult.

[0039] The fixing devices 1A and 1B according to the fifth item of the present disclosure are the fixing devices 1A and 1B according to the first item, wherein the object 2 is fixed to the mounting members 45 and 48 adhered to the fixing plate 4 with adhesives 25 and 24 having electrical insulation properties.

[0040] According to the fixing devices 1A and 1B having the above configuration, by adopting the mounting members 45 and 48 corresponding to the shape of the object 2, it is possible to cope with various objects 2.

[0041] The fixing devices 1A and 1B according to the sixth item of the present disclosure are the fixing devices 1A and 1B according to the fifth item, wherein the object 2 and the mounting members 45 and 48 are bound by binding tools 43 and 46.

[0042] According to the fixing devices 1A and 1B having the above configuration, the object 2 can be fixed to the fixing plate 4 without involving machining.

[0043] The fixing devices 1A and 1B according to the seventh item of the present disclosure are the fixing devices 1 according to the fifth or sixth item, wherein the object 2 is a pipe 21, a cable, or a sensor probe.

[0044] The fixing devices 1A and 1B having the above configuration are suitable for fixing long objects such as the pipe 21, the cable, and the sensor probe to the facing material 10.

[0045] The fixing method according to the eighth item of the present disclosure is a method of fixing the object 2 to the facing material 10 constituting the wall of the liquefied gas tank or the facing material 10 of the heat insulating panel surrounding the liquefied gas tank, adhering the seat portion 31 of the stud 3 having the bolt portion 32 and the seat portion 31 to the facing material 10 with an adhesive 22 having electrical insulation properties, fixing the object 2 to the fixing plate 4, and preventing the fixing plate 4 from falling off from the bolt portion 32 by passing the fixing plate 4 and the nut 38 through the bolt portion 32.

[0046] According to the above method, the fixing devices 1, 1A, 1B holding the object 2 are adhered to the facing material 10, whereby the object 2 is fixed to the facing material 10. In this way, the object 2 can be fixed to the facing material 10 for which welding is difficult. For fixing the object 2, welding and machining other than sanding (e.g., drilling, etc.) are unnecessary, it can be used in a space where the use of fire is restricted, and the surface shape and characteristics of the facing material 10 do not change.

[0047] The above discussion of the present disclosure has been presented for purposes of illustration and description and is not intended to limit the present disclosure to the forms disclosed herein. For example, in the foregoing detailed description, various features of the present disclosure are grouped in several embodiments for the purpose of rationalizing the present disclosure, but some of the plurality of features may be combined. Also, the plurality of features included in the present disclosure may be combined in alternative embodiments, configurations, or aspects other than those discussed above.

Description of Reference Numerals

[0048] 1, 1A, 1B: Fixing device 2: Object 3: Stud 4: Fixing plate 10: Facing material 20: Probe 21: Pipe 22 - 25: Adhesive 31: Seat portion 32: Bolt portion 36: Spring washer (an example of an elastic body) 36: Elastic body 38: Nut 41: Insertion hole 43, 46: Fastener 45, 48: Mounting material

Claims

1. A fixing device for fixing an object to a surface material constituting a wall of a liquefied gas tank or a surface material of a heat insulating panel surrounding the liquefied gas tank, A stud having a bolt portion and a seat portion including a back surface and a surface from which the bolt portion stands, the back surface being adhered to the face material by an electrically insulating adhesive; a fixing plate having an insertion hole through which the bolt portion of the stud is inserted and to which the object is fixed; a nut that is screwed into the bolt portion of the stud and prevents the fixing plate from falling off from the bolt portion. Fixation device.

2. The object is disposed between the surface material and the fixed plate, and the object is adhered to the fixed plate with an adhesive having electrical insulation properties and is in direct contact with the surface material. The fixation device of claim 1 .

3. Further comprising an elastic body disposed between the fixing plate and the nut. The fixation device of claim 1 .

4. the object is a probe of a sensor; A fixing device according to any one of claims 1 to 3.

5. The object is fixed to a mounting material that is adhered to the fixing plate with an adhesive having electrical insulation properties. The fixation device of claim 1 .

6. The object and the mounting material are fastened together with a fastener.

6. The fixation device of claim 5.

7. The object is a pipe, a cable, or a rod-shaped sensor probe.

7. The fixation device of claim 1, 5 or 6.

8. A method for fixing an object to a surface material constituting a wall of a liquefied gas tank or a surface material of an insulating panel surrounding the liquefied gas tank, comprising the steps of: a seat portion of a stud having a bolt portion and a seat portion is bonded to the face material with an adhesive having electrical insulation properties; Fixing the object to a fixing plate; and and passing the fixing plate and a nut through the bolt portion to prevent the fixing plate from falling off from the bolt portion. Fixing method.

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