JP2018204738A - Heat insulating structure for first class pressure vessel - Google Patents

Abstract

To provide a heat insulating structure that is inexpensive, can be readily and reliably removed and re-installed, and can reliably insulate heat and hold the temperature.SOLUTION: In a heat insulating structure for a first class pressure vessel, an external surface of a first class pressure vessel is detachably covered with a heat insulating material made of a foamed body. A fastening belt is wound around an outer peripheral surface of the heat insulating material to fix the heat insulating material.SELECTED DRAWING: Figure 1

Description

In order to cope with the annual inspection imposed on the pressure vessel of type 1 more than once / year, the installed heat insulation material is removed every time it is inspected, and it must be reassembled after the inspection. The present invention provides a technology that can easily and inexpensively remove and reassemble the heat insulating and heat insulating material.

In general, glass wool and rock wool are used as heat insulation and heat insulation materials around 200 ° C., and fiber materials such as ceramic wool are used as heat insulation heat insulation materials at higher temperatures. Lining with a metal plate is performed from above, or a bag is made of a cloth-like material that matches the heat-resistant temperature, and after a heat-insulating heat-retaining material is placed therein, the heat-retained body is covered. This makes the construction of insulation and heat insulation expensive, and it is necessary to disassemble and remove the insulation and then reassemble it because of the annual inspection duty imposed on Type 1 pressure vessels. Thus, the construction of the heat insulating and heat insulating material on the first type pressure vessel has been hindered. Further, the scattering of fibers of the fibrous heat insulation material is a big problem, and it has been difficult to give the worker unpleasant feeling, especially mixing into food in a food factory, making the construction of heat insulation heat insulation difficult.

JP2000-35192 JP2000-337588 JP-A-9-281280

Patent Document 1 merely aims to be able to safely and without causing damage or deformation even when walking on a pipe or the like with a heat insulating and heat insulating material for cleaning, repair or replacement. Patent Document 2 covers the heat insulating heat insulating material with a metal lining, and the heat insulating heat insulating body thus made is assembled in the circumferential direction and the long axis direction and can be easily attached and detached. It ’s just that. Patent Document 3 provides a heat insulating and heat insulating material for a reactor pressure vessel that is easy to assemble and remove heat insulating heat insulating material at the time of periodic inspection, etc., and its supporting structure. The metal support structure is included so that it can be easily removed and assembled, and this structure is used for removal and assembly.

Article 41 Paragraph 2 of the Occupational Safety and Health Law obliges to take an individual inspection at the time of manufacture or import based on the Class I Pressure Vessel Structure Standard and a periodic self-inspection at least once a year. Therefore, it is necessary to remove and reassemble the heat insulating and heat insulating material assembled for each time. For this reason, the installation of the heat insulating and heat insulating material, which is expensive and difficult to remove and reassemble, to the first type pressure vessel has hardly been installed despite the enormous energy loss. The present invention provides a heat insulating and heat insulating structure that is inexpensive, can be removed and reassembled easily and reliably, and can be reliably insulated and insulated.

In order to solve the problem of the preceding paragraph, in the present invention, the outer surface of the first type pressure vessel is detachably covered with a heat insulating heat insulating material made of foam, and a fastening belt is wound around the outer peripheral surface of the heat insulating heat insulating material. Thus, the heat insulating and heat insulating structure of the first type pressure vessel is characterized in that the heat insulating and heat insulating material is fixed.

The heat insulation material has a 25% compression stress of 80 kPa or more, an apparent specific gravity of 35 kg / cubic meter or more, a water absorption of 0.4 kg / cubic meter or less, has closed cells rich in elastic modulus, and has a thickness of 10 to The structure uses a 100 mm foam.

Moreover, radiation heat dissipation can be further reduced by using an aluminum foil or a stainless steel foil attached to one side or both sides of the heat insulation and heat insulating material, or by depositing aluminum.

Furthermore, a plurality of abutting portions of the heat insulating heat insulating material are covered with a pressing plate, and the fastening belt is wound around the outer periphery of the heat insulating heat insulating material via the pressing plate, so that the heat insulating heat insulating material is deformed and the butt portion This prevents the belt from lifting and opening, and reduces the number of fastening belts required.

Since the holding plate is made of a transparent or translucent synthetic resin material, it becomes possible to constantly monitor the deformation due to the shrinkage of the heat insulating heat insulating material, the lifting and opening of the butt portion, and when the above occurs, a fastening belt It has a structure that is corrected by tightening.

Further, both end plate portions of the first type pressure vessel are covered with a disk-shaped heat insulating heat insulating material, and the disk-shaped heat insulating heat insulating material is substantially the same as other heat insulating heat insulating materials covering the outer peripheral surface of the first type pressure vessel. By being fixed by the L-shaped fastener, the structure is simple to remove and assemble.

The end plate portions of both ends of the first type pressure vessel are covered with a disk-shaped heat insulating heat insulating material, and the disk-shaped heat insulating heat insulating material and another heat insulating heat insulating material and a surface fastener covering the outer peripheral surface of the first type pressure vessel. By being fixed by, it has a structure that can be further removed and assembled.

Since the fastening belt has a structure that can be freely tightened and loosened, it can be easily separated by loosening or cutting the fastening belt when removing the heat insulating material.

The heat insulation heat insulating material has a structure composed of a plurality of layers of foam including an inner foam and an outer foam having a lower heat resistance temperature than the inner foam.

The first-type pressure vessel is covered with a bag body that can be opened and closed by a fastener together with the heat insulating heat insulating material and the fastening belt.

The heat insulating and heat insulating structure of the present invention is inexpensive and can easily and reliably remove and reassemble the heat insulating and heat insulating material. In addition, since the investment recovery period by implementing the present invention is greatly shortened, the heat insulation and heat insulation in the first type pressure vessel advances, and a great energy saving can be expected. Furthermore, since the scattering of the fibrous material can be prevented, the discomfort of the worker can be eliminated and the mixing of the scattered material into the product can be eradicated. In particular, it can eradicate food contamination. As a result, there are no obstacles to the construction of the heat insulating material.

It is a top view of the heat insulation heat retention structure of the 1st type pressure vessel of this embodiment. It is AA sectional drawing in FIG. 1 covered with heat insulation heat retention. It is a side view of the heat insulation heat retention structure of the 1st type pressure vessel of this embodiment. It is a cross-sectional view of the heat insulation heat retention structure of the 1st type pressure vessel of other embodiments concerning the present invention. It is a top view of the heat insulation heat retention structure of the 1st type pressure vessel of other embodiments concerning the present invention.

A method for solving this problem will be described with reference to FIG. In the present invention, a foam having a thickness of synthetic resin or rubber is used as the heat insulating heat insulating material 2 and the disk-shaped heat insulating heat insulating plate 6 without using glass wool, rock wool, ceramic wool or the like. The entire first-class pressure vessel 1 is detachably covered with a plurality of heat insulating and heat insulating materials 2 and disk-shaped heat insulating and heat insulating plates 6 having the necessary thickness and heat resistance temperature. It is used. The fastening belt 3 is wound around the outer peripheral surface of the heat insulating material 2 and tightened. By using this fastening belt 3, it is possible to reduce the surface tightening pressure to the heat insulating heat insulating material 2 and to suppress the deformation of the heat insulating heat insulating material 2. In addition, the use of foam eliminates the risk of scattering of fibrous materials generated from heat insulation and heat insulation materials that have been used in the past, and can eliminate the discomfort imparted to workers and completely avoid mixing into foods. .

As the heat insulating heat insulating material 2 and the disk-shaped heat insulating heat insulating plate 6, a 25% compressive stress is 80 kPa or more, an apparent specific gravity is 35 kg / cubic meter or more, a water absorption is 0.4 kg / cubic meter or less, and closed cells with high elastic modulus. A foam having a thickness of 10 to 100 mm is used. By using the foam having this property, deformation of the shape due to tightening of the fastening belt 3 can be prevented, and a decrease in heat insulation performance due to heat conduction and a decrease in heat insulation performance due to water absorption can be prevented. Further, since the heat insulating and heat insulating material can be deformed into the shape of the first type pressure vessel, the entire vessel can be efficiently covered.

The first type pressure vessel 1 is entirely covered with a plurality of heat insulating heat insulating materials 2 and a disk-shaped heat insulating heat insulating plate 6, but the abutting portion 21 between the heat insulating heat insulating materials covering the outer peripheral surface of the first type pressure vessel 1. The heat insulating heat insulating material 2 is securely fixed by a plurality of fastening belts 3 so as to prevent deformation, lifting and separation due to contraction.

The fastening belt 3 used here is a fastening belt having a ratchet buckle portion 4 used for truck load fixing, and the heat insulating and heat insulating material 2 and the butting portions 21 and 22 are simultaneously and inexpensively fixed.
The fastening belt having the ratchet buckle portion 4 is replaced by a generally used load fixing belt having a structure portion that can be freely tightened or loosened, or a PP band for packing and a stopper for fixing the same. be able to.

Further, a pressing plate 5 having a length of 100 to 300 mm and substantially the same length is applied to the abutting portion 21 of the heat insulating and heat insulating material 2 in the long axis direction, and the fastening belt 3 is wound and fixed thereto through this. Thereby, the use number of the fastening belt 3 of the heat insulation heat insulating material 2 can be reduced. Further, the presser plate 5 is made of a transparent or translucent synthetic resin plate suitable for the heat-resistant temperature, such as an acrylic plate, so that the butted portions 21 and 22 are deformed, lifted, opened, etc. due to the shrinkage of the heat insulating and heat insulating material 2. Is constantly monitored and can be used as a clue to correction such as retightening. However, this does not apply when the heat resistant temperature is insufficient or difficult to obtain. The pressing plate 5 can also be installed on the circumferential abutting portion 22.

The end plate portions at both ends of the first-type pressure vessel 1 extend with the same diameter as the outer diameter of the heat insulating heat insulating material 2 and are sealed using a disk-shaped heat insulating heat insulating plate 6 having the same outer diameter as the heat insulating heat insulating material 2. . As shown in FIGS. 1 and 3, the disk-like heat insulating heat insulating plate 6 and the body heat insulating heat insulating material 2 are connected and fixed, as shown in FIGS. 1 and 3, with a plurality of perforated substantially L-shaped fasteners 7 so as not to drop, lift and open. The fixing hole 8 is used for fixing. The diameter of the disc-shaped heat insulating heat insulating plate 6 can be the same as the inner diameter of the heat insulating heat insulating material 2 and can be sealed by being inserted into the heat insulating heat insulating material 2. A plurality of hook-and-loop fasteners can be used instead of the substantially L-shaped fastener 7.

As a method of fixing the heat insulating heat insulating material 2 and the disk-shaped heat insulating heat insulating plate 6 in the previous paragraph, a surface fastener can be attached to the end cross section of the heat insulating heat insulating material 2 and the circumferential end surface of the disk-shaped heat insulating heat insulating plate 6 to be sealed. .

Use one of the heat insulating heat insulating material 2 and the disk-shaped heat insulating heat insulating plate 6 used here, or a mirror-coated aluminum foil or stainless steel foil, or a vapor deposited aluminum, or a large amount of aluminum powder. Radiant heat dissipation can be greatly reduced by applying the coating material contained in.

By attaching a specific number, etc., to the heat insulating heat insulating material 2 and the disk-shaped heat insulating heat insulating plate 6 installed in a plurality of sheets, it is possible to assemble more reliably and more easily when reassembling. As a result, the burden on workers can be reduced. The same applies to the pressing plate 5 installed in the abutting portion 21 of the heat insulating and heat insulating material.

By creating a drawing of the heat insulating heat insulating material 2 and the disk-shaped heat insulating heat insulating plate 6 at the time of the initial construction, it becomes possible to make further investments reliably and inexpensively when replacing damaged parts or starting over again. The collection year can be shortened.

Moreover, like other embodiment shown in FIG. 4, the heat insulation heat insulating material is comprised from the multi-layer foam containing the inner side foam 2a and the outer side foam 2b whose heat resistance temperature is lower than this inner side foam 2a. May be. As a result, it is possible to carry out the heat insulation and heat insulation matching the heat resistance temperature at a lower cost. In addition, the disk-shaped heat insulation heat insulating material 6 is comprised from the heat insulation heat insulating material of the several layer similarly to the heat insulation heat insulation material 2. FIG.

Further, as in another embodiment shown in FIG. 5, the container may be covered with a bag body 23 that can be opened and closed by a fastener 24 together with the heat insulating and heat insulating material 2 and the fastening belt 3. As a result, the heat insulation and heat insulation effect can be improved and the scattering due to the damage of the foam can be more reliably prevented.

1. First kind pressure vessel2. Insulation insulation 2a. Inner foam 2b. Outer foam 3. Fastening belt for heat insulation material 4. 4. Fastening part of fastening belt 6. Holding plate 6 for fixing the heat insulation and heat insulation material butt portion, disc-shaped heat insulation heat insulation plates at both ends of the first kind pressure vessel heat insulation heat insulation material 7. L-shaped clasp with holes for heat insulation at both ends. 21. Fixing hole 21 for fixing the substantially L-shaped fastener with a hole and the heat insulating material. 21. Abutting portion of the heat insulating heat insulating material in the horizontal direction. 24. Abutting portion of the heat insulating heat insulating material in the vertical direction Bag body 24. fastener

Claims (10)

The outer surface of the first type pressure vessel is detachably covered with a heat insulating heat insulating material made of foam, and the heat insulating heat insulating material is fixed by winding a fastening belt around the outer peripheral surface of the heat insulating heat insulating material. A heat insulation and heat insulation structure of the first type pressure vessel. The heat insulation material has a 25% compression stress of 80 kPa or more, an apparent specific gravity of 35 kg / cubic meter or more, a water absorption of 0.4 kg / cubic meter or less, has closed cells rich in elastic modulus, and has a thickness of 10 to 100 mm. 2. The heat insulating and heat insulating structure for a first type pressure vessel according to claim 1, wherein the heat insulating and heat insulating structure is made of the following foam. 3. The heat insulating and heat insulating structure for a first type pressure vessel according to claim 1, wherein an aluminum foil or a stainless steel foil is attached to one surface or both surfaces of the heat insulating and heat insulating material or aluminum is deposited. 4. The abutting portion between the heat insulating heat insulating materials is covered with a pressing plate, and the fastening belt is wound around the outer periphery of the heat insulating heat insulating material through the pressing plate. The heat insulation and heat insulation structure of the first type pressure vessel according to claim 1. 5. The heat insulating and heat insulating structure for a first type pressure vessel according to claim 4, wherein the pressing plate is made of a transparent or translucent synthetic resin material. The end plate portions of both ends of the first type pressure vessel are covered with a disk-shaped heat insulating heat insulating material, and the disk-shaped heat insulating heat insulating material is substantially L with another heat insulating heat insulating material covering the outer peripheral surface of the first type pressure vessel. 6. The heat insulation and heat insulation structure for a first type pressure vessel according to any one of claims 1 to 5, wherein the heat insulation structure is fixed by a letter-shaped fastener. The end plate portions of both ends of the first type pressure vessel are covered with a disk-shaped heat insulating heat insulating material, and the disk-shaped heat insulating heat insulating material is another surface heat insulating material and a surface fastener covering the outer peripheral surface of the first type pressure vessel. The heat insulating and heat insulating structure for a first type pressure vessel according to any one of claims 1 to 6, wherein the heat insulating and heat insulating structure is fixed. The heat insulation and heat insulation structure for a first type pressure vessel according to any one of claims 1 to 7, wherein the fastening belt has a structure capable of being freely tightened and loosened. The said heat insulation heat insulating material consists of a multi-layer foam containing an inner side foam and an outer side foam lower in heat-resistant temperature than this inner side foam, The 1st type pressure vessel of Claim 1-8 Thermal insulation structure. The heat insulation and heat insulation structure of the 1st type pressure vessel in any one of Claims 1-9 with which the said 1st type pressure vessel is covered with the bag body which can be opened and closed with a fastener with the said heat insulation heat insulation material and the said fastening belt.

Images