Spacer for pipe support tool

Abstract

To provide a spacer for a pipe support tool capable of preventing corrosion of a pipe support tool and imparting heat resistance to a pipe support tool at low cost even when a temperature of a pipe is high.SOLUTION: A spacer 1 according to the present invention comprises a split body 18a made of olefin resin and attached to a support part 11a of a pipe hanging metal fitting 2; and a split body 18b made of olefin resin and attached to a support part 11b of the pipe hanging metal fitting 2. The split body 18a is provided with an inner wall part 19a that covers an inner peripheral surface 9a of the support part 11a and is in contact with an outer peripheral surface 14 of a pipe 3. The split body 18b is provided with an inner wall part 19b that covers an inner peripheral surface 9b of the support part 11b and is in contact with the outer peripheral surface 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a spacer for a pipe support, which is used in a pipe support device that is attached to a structure such as a building to support pipes. [Background technology]

[0002] As a pipe support device that is attached to a structure such as a building (as defined in the "Basic Principles of Civil Engineering and Architectural Design" (Ministry of Land, Infrastructure, Transport and Tourism), in this application, "structure" is used to mean "something that has a intended function and is artificially constructed with the intention of resisting an action") to support a pipe, there is a pipe support device that has the pipe support structure described in Patent Document 1, for example.

[0003] This pipe support comprises a suspension member having a split shape with an inner circumferential surface conforming to the circumferential surface of the pipe and a first holding part and a second holding part that are rotatably connected to each other via a hinge, and vibration-damping rubber attached to the first holding part and the second holding part, and supports the pipe by holding it with the first holding part and the second holding part via the vibration-damping rubber and suspending the pipe from the ceiling.

[0004] The vibration-damping rubber comprises a first rubber body that covers the inner circumferential surface of the first retaining part and is attached to the circumferential surface of the pipe, a second rubber body that covers the inner circumferential surface of the second retaining part and is attached to the circumferential surface of the pipe, and a connecting part that connects the first rubber body and the second rubber body with the hinge exposed between the second rubber body and the first rubber body, covering the inner circumferential surfaces of the first and second retaining parts in the portion corresponding to the hinge position and being attached to the circumferential surface of the pipe, thereby suppressing the occurrence of rust on the suspension member. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2018-204773 [Overview of the project] [Problems that the invention aims to solve]

[0006] Incidentally, when dissimilar metals come into contact, such as when supporting stainless steel piping with iron pipe supports, there is a concern that corrosion may occur. In Patent Document 1, corrosion is prevented by insulating the pipe support from the piping using vibration-damping rubber, and insulation is also performed by coating the pipe support with polyvinyl chloride resin.

[0007] On the other hand, stainless steel piping is used for water supply, hot water supply, and high-temperature wastewater. In particular, when high temperatures are reached for hot water supply and high-temperature wastewater, usage conditions such as a limit of 60°C or less are imposed, taking into account the properties of the polyvinyl chloride resin that comes into contact with the piping. However, in recent years, due to advancements in hot water supply equipment and measures to prevent the growth of Legionella bacteria, pipe temperatures have risen to 80-90°C, and problems such as polyvinyl chloride resin dissolving or chlorine gas being generated have been confirmed.

[0008] Therefore, at construction sites, heat-resistant tape is wrapped around the pipes before supporting them with pipe supports, but the tape is difficult to work with.

[0009] Furthermore, while manufacturers of pipe supports sell pipe supports coated with elastomers produced by dipping metal fittings in elastomer raw materials and drying them, or by injection insert molding, or pipe supports manufactured by applying fluororesin to the metal fittings, elastomers and fluororesins are generally expensive, which poses a problem in terms of the manufacturing cost of pipe supports.

[0010] This invention has been made in view of the above circumstances, and aims to provide a spacer for pipe supports that prevents corrosion of pipe supports and can also provide heat resistance to pipe supports at low cost even when the pipes are at high temperatures. [Means for solving the problem]

[0011] To solve the above problems, the present invention provides a spacer for a pipe support that is attached to a pipe support and interposed between the pipe and the pipe support, wherein the pipe support is provided with a first support piece having a first base attached to a structure and a first support portion formed with a first inner circumferential surface capable of supporting a part of the outer circumferential surface of the pipe at a specific position in the extending direction of the pipe, and a second support piece having a second base attached to a structure and a second support portion formed with a second inner circumferential surface capable of supporting the other part of the outer circumferential surface at the specific position, and comprises a first resin body made of an olefin resin attached to the first support portion and a second resin body made of an olefin resin attached to the second support portion, wherein the first resin body is provided with a first inner wall portion that covers the first inner circumferential surface and abuts against the outer circumferential surface, and the second resin body is provided with a second inner wall portion that covers the second inner circumferential surface and abuts against the outer circumferential surface.

[0012] Alternatively, the present invention relates to a spacer for a pipe support that is attached to a pipe support and interposed between the pipe and the pipe support, wherein the pipe support is provided with a U-bolt having a U-shape and a pair of threaded portions at both ends, and a plate provided with a pair of insertion holes through which the pair of threaded portions are inserted, and comprises a third resin body made of olefin resin that is attached to the U-bolt, and a fourth resin body made of olefin resin that is placed on the plate, wherein the third resin body is provided with a first recess capable of supporting a part of the outer surface of the pipe at a specific position in the extending direction of the pipe, and the fourth resin body is provided with a second recess capable of supporting the other part of the outer surface at the specific position.

[0013] The olefin resin is preferably polymethylpentene.

[0014] The pipe support may be equipped with a turnbuckle that is suspended from the structure, and the first base and the second base may be attached to the structure via the turnbuckle.

[0015] Further, the first resin body may be provided with a first end wall portion that covers both end faces of the first support portion in the extending direction, and the second resin body may be provided with a second end wall portion that covers both end faces of the second support portion in the extending direction.

[0016] Furthermore, a first groove portion may be provided in the first inner wall portion along the extending direction, and a second groove portion may be provided in the second inner wall portion along the extending direction.

[0017] Also, at least one end of one side and the other side of the first inner wall portion in the circumferential direction of the outer peripheral surface is provided with a first recess along the extending direction, and at least one end of one side and the other side of the second inner wall portion in the circumferential direction of the outer peripheral surface is provided with a second recess along the extending direction. In a state where the first inner wall portion and the second inner wall portion are in contact with the outer peripheral surface, a space is secured between the first recess and the second recess and the outer peripheral surface, and one end of the first inner wall portion abuts against one end of the second inner wall portion, and the other end of the first inner wall portion abuts against the other end of the second inner wall portion.

Advantages of the Invention

[0018] According to the present invention, corrosion of the pipe support can be prevented, and heat resistance can be imparted to the pipe support at low cost even when the pipe is at a high temperature.

Brief Description of the Drawings

[0019] [Figure 1] It is a front view showing a pipe hanger to which a spacer according to an embodiment for carrying out the invention is attached. [Figure 2] It is a side view showing the spacer and the pipe hanger of FIG. 1. [[ID=​​​​​​​Figure 4 is a side view showing the pipe suspension fittings. [Figure 6] Figure 4 is a plan view showing the pipe suspension fittings. [Figure 7] This is a front view showing another example of a pipe hanger fitted with the spacer shown in Figure 1. [Figure 8] Figure 7 is a side view showing the pipe suspension fittings. [Figure 9] Figure 7 is a plan view showing the pipe suspension fittings. [Figure 10] This is a diagram showing the qualitative elements obtained by ICP emission spectrometry. [Figure 11] This figure shows the GC / MS analysis results of the blank in the dissolution test. [Figure 12] This figure shows the GC / MS analysis results of sample 1 in the dissolution test. [Figure 13] This figure shows the GC / MS analysis results of sample 2 in the dissolution test. [Figure 14] This figure shows the GC / MS analysis results of sample 3 in the dissolution test. [Figure 15] This figure shows the qualitative analysis results of ICP emission spectrometry. [Figure 16] This is an explanatory diagram showing the external appearance of a compression testing apparatus. [Figure 17] (a) is an explanatory diagram showing how to determine the test time for each tensile load until the difference in displacement becomes the thickness of the spacer in a creep test, and (b) is an explanatory diagram showing how to determine the test time for the working load from the relationship between tensile load and test time. [Figure 18] This figure shows the measurement results of the differential displacement for each tensile load in a creep test. [Figure 19] This figure, based on Figure 18, shows the relationship between the difference in displacement and test time for each tensile load. [Figure 20] This figure, based on Figure 19, shows the relationship between tensile load and the time it takes for the difference in displacement to reach the thickness of the spacer. [Figure 21] This is a front view showing a pipe suspension fitting to which another spacer according to an embodiment of the invention is attached. [Figure 22]This is a front view showing a pipe support with yet another spacer attached, according to an embodiment for carrying out the invention. [Figure 23] Figure 22 is a perspective view showing a pipe support with the spacer attached. [Figure 24] (a) is a perspective view showing one of the spacer segments in Figure 22, and (b) is a perspective view showing the other segment. [Figure 25] This is a front view showing a pipe suspension fitting to which another spacer according to an embodiment of the invention is attached. [Modes for carrying out the invention]

[0020] Embodiments of the present invention will be described with reference to the drawings.

[0021] As shown in Figures 1 to 3, the spacer 1 according to this embodiment is attached to the pipe hanger 2 of the hinged vertical band and is interposed between the pipe 3 and the pipe support 2 when the pipe hanger 2 supports the stainless steel pipe 3.

[0022] As shown in Figures 4 to 6, the pipe suspension fitting 2 is constructed by connecting the lower parts of a pair of band pieces 4a and 4b with a hinge 5, and fastening the upper parts with bolts 6 and nuts 7.

[0023] The band piece 4a is formed by pressing a strip of steel plate and comprises a flat fastening portion 8a and a support portion 11a whose plate surface is curved in an arc shape to form an inner circumferential surface 9a and an outer circumferential surface 10a. The fastening portion 8a has two through holes 12a arranged vertically, and a pair of protrusions 13 are provided at positions flanking the through holes 12a. The inner circumferential surface 9a supports a part of the outer circumferential surface 14 of the pipe 3 (in Figure 1, the right part 14a of the outer circumferential surface 14) via the spacer 1 at a specific position in the X direction (see Figures 2 and 3) along which the pipe 3 extends.

[0024] The band piece 4b is formed by pressing a strip of steel plate and comprises a flat fastening portion 8b and a support portion 11b whose plate surface is curved in an arc shape to form an inner circumferential surface 9b and an outer circumferential surface 10b. Two insertion holes 12b are provided vertically in the fastening portion 8b, and the inner circumferential surface 9b supports the other part of the outer circumferential surface 14 of the pipe 3 (the left part 14b of the outer circumferential surface 14 in Figure 1) via the spacer 1 at the specific position described above.

[0025] When the band piece 4b is not fastened to the band piece 4a by the bolt 6 and nut 7, it can rotate in the R direction (see Figure 4) with the hinge 5 as the pivot point, and is used to attach the piping 3 by opening and closing relative to the band piece 4a.

[0026] The bolt 6 comprises a head 15 and a shaft 16 with a threaded portion. The shaft 16 is inserted through the through holes 12a and 12b, and a nut 7 is screwed onto the portion protruding from the through hole 12b (a pair of protrusions 13 clamp the head 15 to prevent rotation, making it easy to screw on the nut 7), thereby fastening the fastening portion 8a and the fastening portion 8b together. The fastening portions 8a and 8b are attached to the structure 17 (including fittings for attaching the pipe hanger 2 to a building; see Figures 1 and 2) with the structure 17 sandwiched between them, by being fastened together by two sets of bolts 6 and nuts 7 that are fastened to the two sets of through holes 12a and 12b.

[0027] Spacer 1 is composed of two divided parts 18a and 18b. The divided parts 18a and 18b are formed by injection molding an olefin resin such as polymethylpentene (for example, a mixture of a crystalline olefin polymer with a melting point of 220°C or higher, excellent heat resistance and insulation properties, with a small amount of additives added).

[0028] The divided body 18a is attached to the support portion 11a of the band piece 4a and has an inner wall portion 19a that covers the inner circumferential surface 9a of the support portion 11a and abuts against the outer circumferential surface 14 of the pipe 3, and an end wall portion 21a that covers the end face 20a of the support portion 11a in the X direction.

[0029] The inner wall portion 19a is provided with grooves 22a along the X direction, which ensure ventilation near the outer surface 14 when the pipe 3 becomes hot, and help suppress the temperature rise of the pipe 3 and the divided body 18a itself.

[0030] The end wall portion 21a has a pair of notches 23a formed on the side opposite to the inner wall portion 19a, and an engaging portion 24a is provided partitioned by the notches 23a. The engaging portion 24a has a claw portion 25a that is bent so as to contact the end face 20a of the support portion 11a to the outer circumferential surface 10a. The engaging portion 24a elastically deforms so that the support portion 11a is fitted between the pair of end wall portions 21a of the divided body 18a, the inner wall portion 19a comes into contact with the inner circumferential surface 9a and the claw portion 25a engages with the outer circumferential surface 10a, thereby allowing the divided body 18a to be attached to the support portion 11a with a single touch.

[0031] Similarly, the divided body 18b is attached to the support portion 11b of the band piece 4b and has an inner wall portion 19b that covers the inner circumferential surface 9b of the support portion 11b and abuts against the outer circumferential surface 14 of the pipe 3, and an end wall portion 21b that covers the end face 20b of the support portion 11b in the X direction.

[0032] The inner wall portion 19b is provided with grooves 22b along the X direction, which ensure ventilation near the outer surface 14 when the pipe 3 becomes hot, and help suppress the temperature rise of the pipe 3 and the divided body 18b itself.

[0033] The end wall portion 21b has a pair of notches 23b formed on the side opposite to the inner wall portion 19b, and an engaging portion 24b is provided within the notches 23b. The engaging portion 24b has a claw portion 25b that is bent to contact the end face 20b of the support portion 11b to the outer circumferential surface 10b. The engaging portion 24b elastically deforms so that the support portion 11b is fitted between the pair of end wall portions 21b of the divided body 18b, the inner wall portion 19b comes into contact with the inner circumferential surface 9b, and the claw portion 25b engages with the outer circumferential surface 10b, thereby allowing the divided body 18b to be attached to the support portion 11b with a single touch.

[0034] Figures 7 to 9 show the pipe suspension fitting 26 of the hinged suspension band to which the spacer 1 is attached. The pipe suspension fitting 26 comprises a turnbuckle 28 that is suspended from a suspension bolt 27 whose upper end is fixed to a structure such as a ceiling slab of a building, and band pieces 29a and 29b that are attached to the turnbuckle 28.

[0035] Band pieces 29a and 29b have the same configuration as band pieces 4a and 4b, except that the fastening portions 8a and 8b are shorter vertically and each has one insertion hole 12a and 12b. Therefore, they are given the same reference numerals as the parts of band pieces 4a and 4b, and detailed explanations are omitted. The lower parts of band pieces 29a and 29b are connected by a hinge 30, and the upper parts are fastened with a bolt 6 and a nut 7.

[0036] The turnbuckle 28 is made by press-forming a strip of steel plate and has a top portion 31 that is suspended from a suspension bolt 27, and suspension pieces 32a and 32b that extend downward from both ends of the top portion 31 in the Y direction (direction perpendicular to the X direction; see Figures 7 and 9) and are elastically deformable relative to the top portion 31. A through hole 33a is formed in the suspension piece 32a, and a through hole 33b is formed in the suspension piece 32b.

[0037] An intervening member 35 having an insertion hole 34 is provided between the suspension pieces 32a and 32b, and with these sandwiched between the fastening parts 8a and 8b, the shaft portion 37 of the bolt 36 is inserted through the insertion hole 12b, insertion hole 32b, insertion hole 34, insertion hole 32a and insertion hole 12a in that order, and a wing nut 38 is screwed onto the portion protruding from the insertion hole 12a, thereby attaching the fastening parts 8a and 8b to the structure via the turnbuckle 28 and suspension bolt 27. Note that a hexagonal nut may be screwed onto the shaft portion 37 of the bolt 36 instead of the wing nut 38.

[0038] To verify the performance of spacers made of polymethylpentene, dissolution tests and heat resistance tests were conducted.

[0039] In polyvinyl chloride resin, the chlorine it contains decomposes at high temperatures and mixes with condensation water to produce hydrogen chloride, which corrodes pipes. The elution test was conducted to confirm that although polymethylpentene does not contain chlorine, there are no leached substances at high temperatures.

[0040] Furthermore, while polyvinyl chloride resin melts at around 80°C, making it difficult to use, if the equipment needs to withstand 100°C as it evolves, expensive spacers are unacceptable on-site, necessitating cheaper alternatives. However, generally, inexpensive materials, while possessing insulating properties, have low heat resistance. This makes it impossible to conduct life prediction tests to expedite development deadlines, such as the Arrhenius test which accelerates resin degradation by applying high-temperature loads. Therefore, the only way to confirm heat resistance was to conduct tests over a long period of about 20 years, the actual lifespan of use. In the heat resistance test, the Arrhenius test was performed on a spacer made of polymethylpentene to confirm its heat resistance.

[0041] [Dissolution test] 1. Test Method Two samples (approximately 4.5 g each) were taken from Sample 1 (new polymethylpentene), Sample 2 (polymethylpentene heated at 160°C for 24 days), and Sample 3 (polymethylpentene heated at 160°C for 26 days). These samples were subjected to reflux extraction by heating in pure water for 8 hours. After cooling, the extracted solution was diluted to 100 mL, and this was used as the test solution for GC / MS analysis (gas chromatography-mass spectrometry) and ICP emission spectrometry (inductively coupled plasma emission spectrometry). (A test solution prepared by performing the same procedure without taking samples was also prepared and used as a blank.)

[0042] 2. Test equipment, etc. [GC / MS analysis] Measuring instrument: Shimadzu Corporation GCMS-QP2010 Plus Column: Agilent DB-5ms (length 30m, inner diameter 0.25mm, film thickness 0.25μm) Column temperature: 40°C (3 mins) → 20°C / min → 320°C (8 mins) Scan measurement range: m / z 33-550 Injection volume: 1μL Furthermore, substances detected by GC / MS analysis were identified using a mass spectrometry database, and those showing a high degree of agreement with the database were selected. [ICP emission spectrometry] Measuring instrument: Shimadzu Corporation ICPS-8100 Qualitative elements: The 63 elements shown in Figure 10.

[0043] 3. Test Results [GC / MS analysis] The results of measuring the test solution after diluting it 10-fold with acetone are shown in Figures 11 to 14. No substances other than those detected in the blank were found in any of the samples. [ICP emission spectrometry] The results are shown in Figure 15. Trace amounts of silicon (estimated concentration range 10-1 mg / L) were detected in both Sample 1 and Sample 2, which may have leached from glassware or other materials.

[0044] [Heat resistance test] 1. Test Method To predict the lifetime of the sample (polymethylpentene) at a usage environment of 100°C, the sample was heated to 160°C, 170°C, and 180°C under a temperature load. The sample was removed at appropriate intervals to check its strength, and the results were applied to the Arrhenius equation to predict its lifetime (Arrhenius test).

[0045] 2. Test equipment, etc. [Accelerated degradation treatment] Equipment used: ADVANTEC DRM320DD Test temperatures: 160℃, 170℃, 180℃ Processing time: As shown in Figure 15 [Compression test] Equipment used: Instron universal testing machine 5966 Load cell: 10kN Test speed: 5 mm / min Indenter: 10mm square bar Appearance of the device: As shown in Figure 16.

[0046] 3. Test Results It is estimated that approximately 29.2 years will be required for the initial degradation stage (the point at which the maximum load value begins to decrease from the initial maximum load), and it was found that the product has sufficient heat resistance and lifespan when used in an environment of 100°C.

[0047] Furthermore, a creep test was conducted to confirm the creep performance of the spacer made of polymethylpentene. Creep is a phenomenon in which a resin softens at high temperatures and then collapses and thins when a load is continuously applied to it. In the creep test, the creep life of the spacer made of polymethylpentene was determined under the operating conditions of 100°C and 0.137kN (14kgf), until the thickness of the thinnest part approached 0 (until it collapsed to the thickness of the spacer).

[0048] [Creep test] 1. Test Method Using a creep tester, the pipe hanger fitted with a spacer was pulled upwards and the pipe supported by the pipe hanger was pulled downwards under tensile loads of 1kN, 2kN, and 3kN in a 100°C environment, and the displacement D1 of the pipe hanger fitted with the spacer was measured over time. In addition, since measuring only the displacement D1 of the pipe hanger fitted with the spacer would include the displacement of the pipe hanger as well as the spacer, the displacement D2 of the pipe hanger without a spacer was also measured, and the time at which the difference between these two displacements, D = D1 - D2, became equal to the thickness of the spacer (1.6 mm) (the time until the spacer collapses and its thickness becomes 0 mm) was defined as the creep life.

[0049] Specifically, the difference displacement D was measured over time with tensile loads of 1kN, 2kN, and 3kN, and as shown in Figure 17(a), the test time T was determined when the difference displacement D at a tensile load of 1kN reached the thickness of the spacer (1.6mm). 1kN The test time T is when the difference displacement D reaches the thickness of the spacer when the tensile load is 2kN. 2kN The test time T is when the difference displacement D reaches the thickness of the spacer when the tensile load is 3kN. 3kN Determine the following, and as shown in Figure 17(b), the tensile loads of 1kN, 2kN, and 3kN and the test time T 1kN , T 2kN, T 3kN From the correlation with T, the test time T at a service load of 0.137 kN was calculated as the fracture time (creep life).

[0050] 2 Test equipment, etc. Testing device: Multi-type creep testing machine 6MRT-15 type, manufactured by To-shin Kogyo Co., Ltd. Test temperature: 100 °C Number of tests: 6 (3 types of loads (1 kN, 2 kN, 3 kN) × 2 types of specimens (pipe hangers with spacers, pipe hangers without spacers)) Test time: 750 hours (1 month)

[0051] 3 Test results The change in the differential displacement D for tensile loads of 1 kN, 2 kN, and 3 kN is as shown in Fig. 18. When estimating the test time at which the differential displacement D reaches 1.6 mm from the measured values during the test time (450 - 750 hours) when the change was stable, using an approximation formula as shown in Fig. 19, T 1kN = 1.12×10 5 (hours), T 2kN = 1.96×10 4 (hours), T 3kN = 1.18×10 4 (hours).

[0052] When estimating the test time at which the differential displacement D reaches 1.6 mm for a load of 0.137 kN using an approximation formula as shown in Fig. 20, T = 296,281 (hours). The creep life until the spacer collapses under the service environment of 100 °C and 0.137 kN is estimated to be approximately 38.8 years.

[0053] The spacer 1 according to this embodiment comprises a divided body 18a made of olefin resin that is attached to the support portion 11a of the pipe hanger 2 or pipe hanger 26, and a divided body 18b made of olefin resin that is attached to the support portion 11b of the pipe hanger 2 or pipe hanger 26. The divided body 18a is provided with an inner wall portion 19a that covers the inner circumferential surface 9a of the support portion 11a and abuts against the outer circumferential surface 14 of the pipe 3, and the divided body 18b is provided with an inner wall portion 19b that covers the inner circumferential surface 9b of the support portion 11b and abuts against the outer circumferential surface 14. Because the olefin resin has insulating properties, corrosion of the pipe hanger 2 and 26 caused by contact with the pipe 3 can be prevented. Furthermore, because the olefin resin has high heat resistance at a cost comparable to conventional polyvinyl chloride resin, heat resistance can be imparted to the pipe hanger at low cost without changing the pipe hanger 2 and 26 themselves to a heat-resistant specification, even when the pipe 3 is at a high temperature.

[0054] Furthermore, since the divided body 18a is provided with an end wall portion 21a that covers the end face 20a of the support portion 11a, and the divided body 18b is provided with an end wall portion 21b that covers the end face 20b of the support portion 11b, the intrusion of moisture into the space between the inner wall portions 19a, 19b of the spacer 1 and the support portions 11a, 11b (inner circumferential surfaces 9a, 9b) of the pipe suspension fittings 2, 26 is prevented, and corrosion at the contact surface (inner circumferential surfaces 9a, 9b) of the pipe suspension fittings 2, 26 with the spacer 1 can be prevented more reliably.

[0055] The above has provided examples of embodiments for carrying out the present invention, but the embodiments of the present invention are not limited to those described above, and may be modified as appropriate without departing from the spirit of the invention.

[0056] For example, in the above embodiment, the divided body was molded using polymethylpentene, but polyethylene, polypropylene, or the like may be used as the olefin resin.

[0057] Alternatively, the pair of band pieces of the pipe support are connected by a hinge and open and close in a hinge-like manner, but the upper parts of the pair of band pieces may be attached to a pair of suspension pieces of a turnbuckle, and the lower parts of the pair of band pieces may be formed to be engageable with each other, and when the lower parts of the pair of band pieces are not engaged, one band piece rotates from its mounting position with the turnbuckle and opens and closes relative to the other band piece.

[0058] Furthermore, grooves 22a and 22b are not necessarily provided in the inner wall portions 19a and 19b of the divided bodies 18a and 18b, and the end wall portions 21a and 21b do not necessarily have to cover the end faces 20a and 20b completely (they may only partially cover the end faces 20a and 20b in the circumferential direction). In addition, the materials of the piping and pipe supports, and the shape of the spacers are not limited to those described above, and as shown in Figure 21, the divided bodies 18a and 18b may be connected by a connecting body 18c to form a single unit.

[0059] Alternatively, instead of providing grooves 22a and 22b in the inner wall portions 19a and 19b of the divided bodies 18a and 18b, recesses (missing portions) that continue in the direction of extension of the pipe 3 (X direction, see Figure 2) may be provided at the circumferential ends of the inner wall portions 19a and 19b. Figure 25 shows the inner wall portions 19a and 19b of the divided bodies 18a and 18b, with recesses (first recess and second recess) 40a, 40b, 41a, and 41b provided at both ends in the circumferential direction of the inner wall portions 19a and 19b, respectively. As shown in Figure 25, when the inner wall portions 19a and 19b of the divided bodies 18a and 18b are in contact with the outer circumferential surface 14 of the pipe 3, gaps (spaces) S1 and S2 are secured between each recess 40a, 40b, 41a, and 41b and the outer circumferential surface 14 of the pipe 3. Furthermore, in the state where the inner wall portions 19a and 19b of the divided bodies 18a and 18b are in contact with the outer surface 14 of the pipe 3, one end 42a and 43a of the inner wall portions 19a and 19b are in contact with each other, and the other end 42b and 43b of the inner wall portions 19a and 19b are in contact with each other.

[0060] In this way, even when recesses 40a, 40b, 41a, and 41b are formed in the divided parts 18a and 18b, both ends 42a, 43a, 42b, and 43b of the inner wall parts 19a and 19b are in contact with each other, so it is possible to prevent condensation and the like from entering from the boundary between the divided parts 18a and 18b, and thus prevent corrosion of the piping 3.

[0061] Furthermore, when piping 3 is to be placed between the divided bodies 18a and 18b, the gap between the divided bodies 18a and 18b is widened by loosening and moving the nut 7 to the tip of the bolt 6, thereby allowing the piping to be inserted. Here, the band piece 4a of the support part 11a to which divided body 18a is attached and the band piece 4b of the support part 11b to which divided body 18b is attached are connected by a hinge 5. Therefore, when the nut 7 is moved to the tip of the bolt 6, the gap between the divided bodies 18a and 18b in the left-right direction can be widened, but the gap in the up-down direction can hardly be widened.

[0062] However, recesses 40a, 40b, 41a, and 41b are formed at the circumferential ends of the inner wall portions 19a and 19b, and a gap S1 is secured in the upper part of the inner wall portions 19a and 19b, and a gap S2 is secured in the lower part. As a result, when the nut 7 is moved to the tip of the bolt 6, it is possible to secure an internal space that is wider vertically than the diameter of the pipe 3. Therefore, even if the vertical distance between the divided body 18a and the divided body 18b does not widen much as the nut 7 moves, by utilizing the gaps S1 and S2, an internal space with a vertical and horizontal width wider than the diameter of the pipe 3 can be secured, making it possible to insert the pipe 3 between the divided body 18a and the divided body 18b easily and smoothly.

[0063] In Figure 25, the inner wall portions 19a and 19b of the divided bodies 18a and 18b are shown, with recesses 40a, 40b, 41a, and 41b provided at both ends in the circumferential direction of the inner wall portions 19a and 19b, respectively. However, each recess does not necessarily need to be provided at both ends of the inner wall portions 19a and 19b. It is sufficient if it is provided at at least one end in the circumferential direction of the inner wall portions 19a and 19b (at least one of either one end or the other end).

[0064] Figures 22 and 23 show another form of pipe support and spacer, in which the pipe support 30 consists of a metal U-bolt 31, nut 32, and plate 33, and a resin spacer 34 is attached to this pipe support 30. The spacer 34 is interposed between the pipe 3 and the pipe support 30 when the pipe support 30 supports a stainless steel pipe 3.

[0065] More specifically, the U-bolt 31 has an annular portion 31a and straight portions 31b, 31b, giving it a U-shape, and a pair of threaded portions 31c, 31c are provided at both ends (the tips of the straight portions 31b, 31b). The plate 33 is a long, plate-like shape with a pair of through holes 33a, 33a at both ends in the longitudinal direction, and the threaded portions 31c, 31c are inserted through the through holes 33a, 33a, so that the outer circumferential surface 14 of the pipe 3 is sandwiched between the U-bolt 31 and the plate 33 at a specific position in the extending direction, and a nut 32 is screwed onto the portion of the threaded portion 31c that has passed through the through hole 33a. Note that the plate 33 may be part of a member that is not flat overall, such as an angle (angle steel) or a channel (channel steel) (for example, a member that is directly attached to a structure).

[0066] The spacer 34 is composed of a divided body 35 and a divided body 36 made of an olefin resin (in this case, polymethylpentene). As shown in Figure 24, the divided body 35 comprises a U-shaped portion 35a and a pair of flange portions 35b, 35b. The U-shaped portion 35a has a recess 35c on the inside of the U-shape and a fitting groove 35d on the outside of the U-shape, and engaging portions 35e, 35e are provided at approximately the center of the fitting groove 35d along the U-shape. The flange portions 35b, 35b extend outward from both ends of the U-shaped portion 35a, and each flange portion 35b is provided with an insertion hole 35f. The divided body 36 comprises a receiving portion 36a and a pair of flange portions 36b, 36b, and the receiving portion 36a is provided with an arc-shaped recess 36c. The flange portions 36b, 36b extend outward from the side surfaces 36d, 36d of the receiving portion 36a, and each flange portion 36b is provided with an insertion hole 36e.

[0067] When attaching the spacer 34 to the pipe support 30, first, the U-bolt 31 is inserted into the insertion groove 35d of the divided body 35 from the inside of the U-shape, the engaging parts 35e, 35e are engaged with the outside of the U-shape of the U-bolt 31, and the threaded parts 31c, 31c are inserted into the insertion holes 35f, 35f, thereby attaching the divided body 35 to the U-bolt 31.

[0068] Next, the divided body 36 is placed on the plate 33 so that the insertion holes 36e, 36e overlap with the insertion holes 33a, 33a, and with the recess 36c supporting the outer surface 14 of the pipe 3 at a specific position, the threaded portions 31c, 31c (the parts that pass through the insertion holes 35f, 35f) of the U-bolt 31 to which the divided body 35 is attached are inserted into the insertion holes 36e, 36e and the insertion holes 33a, 33a.

[0069] Then, nuts 32, 32 are screwed onto the threaded portions 31c, 31c (the portions through which the insertion holes 33a, 33a are inserted), and tightened until the nuts 32, 32 contact the plate 33. This causes the recess 35c to support the outer circumferential surface 14 of the pipe 3 from the opposite side of the recess 36c at a specific position, and the pipe 3 is sandwiched between the spacer 34 (divided body 35 and divided body 36). At this time, gaps 37, 37 are formed between the flange portions 35b, 35b and 36b, 36b so as not to hinder the tightening of the nuts 32 (the depth of the recess 35c and the thickness of the flange portions 36b, 36b are designed in relation to the diameter of the outer circumferential surface 14 of the pipe 3), and the recess 35c and the side surfaces 36d, 36d come into contact with or are close to each other so as to suppress lateral displacement of the divided body 35 and divided body 36 (displacement in the direction perpendicular to the axis of the pipe 3 (left-right direction in Figure 22)).

[0070] The spacer 34 comprises a divided body 35 made of olefin resin that is attached to the U-bolt 31 of the pipe support 30, and a divided body 36 made of olefin resin that is placed on the plate 33 of the pipe support 30. The divided body 35 is provided with a recess 35c that can support a part of the outer surface 14 of the pipe 3 at a specific position in the extending direction of the pipe 3, and the divided body 36 is provided with a recess 36c that can support the other part of the outer surface 14 at a specific position. Because the olefin resin has insulating properties, corrosion of the pipe support 30 caused by contact with the pipe 3 can be prevented. Furthermore, because the olefin resin has high heat resistance at a cost comparable to conventional polyvinyl chloride resin, heat resistance can be added to the pipe support at low cost without changing the pipe support 30 itself to a heat-resistant specification, even when the pipe 3 is at a high temperature. [Explanation of symbols]

[0071] 1 Spacer 2. Pipe hanging brackets (pipe support devices) 3 Piping 8a Fastening part (first base) 8b Fastening part (second base) 9a Inner surface (first inner surface) 9b Inner surface (second inner surface) 11a Support section (first support section) 11b Support section (second support section) 14 Outer surface 14a Right side (part of the outer surface) 14b Left side (other parts of the outer surface) 17 Structures 18a Divided body (first resin body) 18b Divided body (second resin body) 19a Inner wall section (first inner wall section) 19b Inner wall section (second inner wall section) 20a end face 20b End face 21a End wall section (first end wall section) 21b End wall section (second end wall section) 30 Piping support 31 U-bolt 31c threaded section 33 plates 33a Through hole 35 divided parts (third resin body) 35c recess (first recess) 36-part division (fourth resin body) 36c recess (second recess) 40a, 40b Concave areas (first concave areas) 41a, 41b Concave areas (second concave areas) 42a End portion (one end portion of the first inner wall) 42b End portion (the other end portion of the first inner wall) 43a End portion (one end portion of the second inner wall) 43b End portion (the other end portion of the second inner wall) S1, S2 Gap (space) X extension direction

Claims

1. A spacer for a pipe support that is attached to a pipe support for supporting a pipe and is interposed between the pipe and the pipe support, wherein the pipe support includes a first base portion attached to a structure, and a first support piece having a first support portion formed with a first inner peripheral surface capable of supporting a part of the outer peripheral surface of the pipe at a specific position in the extending direction of the pipe; and a second base portion attached to the structure, and a second support piece having a second support portion formed with a second inner peripheral surface capable of supporting the other part of the outer peripheral surface at the specific position are provided, a first resin body made of an olefin resin and attached to the first support portion, and a second resin body made of an olefin resin and attached to the second support portion, wherein the first resin body is provided with a first inner wall portion that covers the first inner peripheral surface and abuts against the outer peripheral surface, and the second resin body is provided with a second inner wall portion that covers the second inner peripheral surface and abuts against the outer peripheral surface. The spacer for a pipe support is characterized by this.

2. The spacer for pipe support according to claim 1, wherein the olefin resin is polymethylpentene, polyethylene, or polypropylene.

3. The pipe support includes a tumble suspended from the structure, and the first base portion and the second base portion are attached to the structure via the tumble. The spacer for a pipe support according to claim 1 or claim 2 is characterized by this.

4. The first resin body is provided with a first end wall portion that covers both end surfaces of the first support portion in the extending direction, and the second resin body is provided with a second end wall portion that covers both end surfaces of the second support portion in the extending direction. The spacer for a pipe support according to claim 1 or claim 2 is characterized by this.

5. A first groove portion is provided in the first inner wall portion along the extending direction, and a second groove portion is provided in the second inner wall portion along the extending direction. The spacer for a pipe support according to claim 1 or claim 2 is characterized by this.

6. At least one end of one side and the other side of the first inner wall portion in the circumferential direction of the outer peripheral surface is provided with a first recess along the extending direction, and at least one end of one side and the other side of the second inner wall portion in the circumferential direction of the outer peripheral surface is provided with a second recess along the extending direction. In a state where the first inner wall portion and the second inner wall portion are in contact with the outer peripheral surface, a space is secured between the first recess and the second recess and the outer peripheral surface, and one end portion of the first inner wall portion abuts on one end portion of the second inner wall portion, and the other end portion of the first inner wall portion abuts on the other end portion of the second inner wall portion The spacer for a pipe support according to claim 1 or claim 2, characterized in that

7. A spacer for a pipe support that is attached to a pipe support for supporting a pipe and is interposed between the pipe and the pipe support, The pipe support is provided with a U-bolt having a U-shape and provided with a pair of screw portions at both ends, and a plate provided with a pair of insertion holes through which the pair of screw portions are inserted, A third resin body made of an olefin resin and attached to the U-bolt, And a fourth resin body made of an olefin resin and placed on the plate, The third resin body is provided with a first recess capable of supporting a part of the outer peripheral surface of the pipe at a specific position in the extending direction of the pipe, The spacer for a pipe support is characterized in that the fourth resin body is provided with a second recess capable of supporting the other part of the outer peripheral surface at the specific position

8. The spacer for pipe support according to claim 7, characterized in that the olefin resin is polymethylpentene, polyethylene or polypropylene

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