JP6150187B1 - Cylinder heat insulation cylinder and cylinder heat insulation device provided with the same - Google Patents

Abstract

The present invention provides a cylinder heat insulating cylinder that can be manufactured inexpensively using a tube, has a simple mounting operation, and can efficiently heat a gas cylinder, and a cylinder heat insulating device including the cylinder heat insulating cylinder.
The cylinder heat insulation cylinder is installed so as to open and close to the left and right to surround the outer peripheral surface of the gas cylinder, and to form one flow path on the cylinder heat insulation cylinder main body attached to the gas cylinder and the inner wall surface of the cylinder heat insulation cylinder main body. A cylinder thermal insulation cylinder body, an opening and closing means for opening and closing the cylinder thermal insulation cylinder main body to the left and right parts, a fixing means for closing and fixing the left and right parts, and an installation means for installing the tube And comprising. The cylinder heat insulating device includes a cylinder heat insulating tube and a hot water circulation device that is connected to each of the inlet portion and the outlet portion of the tube of the cylinder heat insulating tube and causes water of a predetermined temperature to flow and circulate through the tube.
[Selection] Figure 1

Description

  The present invention relates to a cylinder thermal insulation cylinder for keeping a gas cylinder warm and a cylinder thermal insulation apparatus provided with the cylinder thermal insulation cylinder.

  The high-pressure liquefied gas cylinder is filled with a gas liquid (for example, ammonia) at a high pressure, and the liquid is vaporized and supplied from the gas cylinder. If the use of gas is continued when the ambient temperature is low, the heat of vaporization is insufficient and the pressure (internal pressure) of the gas in the container gradually decreases. As a result, the liquefied gas in the container cannot be vaporized until the end, and there is a problem that the liquid remains in the container. Therefore, there is a demand to use the gas cylinder as much as possible to the end, especially in a factory that uses a large number of gas cylinders for a long time.

  In order to use the liquefied gas in the container to the end, it is necessary to warm the gas cylinder to a temperature lower than the legal temperature (40 ° C. or lower) to promote vaporization. Conventionally, there has been a method of keeping the gas cylinder warm by using an electric heater (jacket) or the like surrounding the peripheral surface of the gas cylinder and supplying power by connecting to a power cord. However, if the power cord is damaged, there is a risk of igniting the high-pressure gas, which is problematic in terms of safety. For this reason, a method for keeping the gas cylinder warm by using hot water instead of electric power has been proposed.

  For example, Patent Literature 1 discloses a gas cylinder heat retaining device that retains a gas cylinder with warm water using a water jacket portion and a temperature controller that surround the peripheral surface of the gas cylinder. According to the present invention, the water jacket having the hot water passage can be easily attached to and detached from the gas cylinder, and is safe because the hot water controlled by the temperature controller is used.

  Patent document 2 discloses a bellows-shaped bathtub that can be expanded and contracted vertically, and a cylinder heat insulating tank for keeping a gas cylinder in the bathtub and keeping warm. This bathtub is easy to carry by folding the bellows up and down when not in use, and when used, the gas bellows can be stretched to form a bathtub and hot water can be added to keep the gas cylinder warm. ing.

Japanese Utility Model Publication No. 64-3199 JP-A-11-263377

  As described above, a water jacket having a hot water passage that can be attached to a gas cylinder is used in the gas cylinder heat insulating device of Patent Document 1. However, although the material of the water jacket is supposed to be made of stainless steel or the like, manufacturing costs are required to form the passage. In addition, the formation of the passage increases the weight of the water jacket, and labor is required when mounting the gas jacket.

  In addition, the cylinder heat insulation tank of Patent Document 2 retains heat by immersing a gas cylinder, introducing warm water into the bathtub from the introduction port, and flowing it out from the upper drainage port. Need to use. In the embodiment in which the hot water is in direct contact with the outer surface of the gas cylinder, the gas cylinder may be corroded.

  In view of the above problems, an object of the present invention is to provide a cylinder heat insulating cylinder that can be manufactured at low cost using a tube and that can efficiently keep a gas cylinder in close contact with the gas cylinder, and a cylinder heat insulating device including the cylinder heat insulating cylinder.

(1) According to the first aspect of the present invention, a cylinder heat insulating cylinder body that opens and closes to the left and right to surround an outer peripheral surface of the gas cylinder and is attached to the gas cylinder, and one flow path is formed on the inner wall surface of the cylinder heat insulating cylinder main body. A tubular tube installed so as to be in close contact with the gas cylinder, and the cylinder heat insulating cylinder body opens and closes the cylinder heat insulating cylinder main body into a semicircular left part and a semicircular right part. And a fixing means for fixing the left part and the right part together, and an installation means for installing the tube.
(2) The invention described in claim 2 is the cylinder heat insulating cylinder according to claim 1, wherein the fixing means is capable of adjusting a length of a diameter of the cylinder heat insulating cylinder.
(3) The invention described in claim 3 is the cylinder heat insulating cylinder according to claim 1 or 2, wherein the tube is detachably installed on the cylinder heat insulating cylinder main body.
(4) The invention described in claim 4 is the cylinder heat insulating cylinder according to any one of claims 1 to 3, wherein the tube has a plurality of tubes, and the left part and the right part of the cylinder heat insulating cylinder main body. Each of the tubes is installed, and the two tubes are connected by a joint and a connection tube to form one flow path.
(5) The invention described in claim 5 is the cylinder heat insulating cylinder according to claim 4, wherein two holes through which the connection tube passes are formed in the heat insulating cylinder main body, and the connection tube is formed in the hole. It was made to penetrate and was installed in the outer side of the said cylinder heat insulation cylinder main body.
(6) The invention described in claim 6 is the cylinder heat insulating cylinder according to any one of claims 1 to 5, wherein a hole through which the inlet portion and the outlet portion of the tube respectively penetrate is formed in the heat insulating cylinder main body. Then, the inlet and the outlet are penetrated through the hole and installed on the outer wall surface of the cylinder heat insulating cylinder body.
(7) The invention described in claim 7 is connected to the cylinder heat insulation cylinder according to any one of claims 1 to 6 and the inlet portion and the outlet portion of the tube of the cylinder heat insulation cylinder, respectively, and has a predetermined temperature. And a hot water circulation device that circulates the water by flowing it through the tube.

  The cylinder heat insulating cylinder of the present invention and the cylinder heat insulating apparatus provided with the cylinder can be manufactured at low cost because they use a tube, and the gas cylinder can be efficiently kept in close contact with the gas cylinder.

It is a perspective view of the cylinder heat insulation cylinder which is one Embodiment of this invention. It is the top view (A) of the closed state of the cylinder heat insulation cylinder main body which is one Embodiment of this invention, and the top view (B) of the open state. It is the front view (A) and back view (B) after attaching the cylinder heat insulation cylinder which is one Embodiment of this invention to a cylinder. It is the expanded view (A) of the left part of the cylinder thermal insulation cylinder which is one Embodiment of this invention, and the expanded view (B) of the right part. FIG. 5 is a left development view (A) and a right development view (B) showing an example of arrangement of tubes different from FIG. 4 of the cylinder heat insulation cylinder according to the embodiment of the present invention. It is explanatory drawing which shows the structure of the cylinder heat retention apparatus which is one Embodiment of this invention.

  Embodiments of the present invention (hereinafter referred to as “examples”) will be described below with reference to the drawings. In the following drawings, common parts are denoted by the same reference numerals, and duplicate descriptions for the same reference numerals are omitted.

[Configuration of cylinder thermal insulation cylinder 100]
First, the structure of the cylinder heat insulation cylinder which concerns on one Example of this invention is demonstrated with reference to FIGS. FIG. 1 is a perspective view of a cylinder heat insulating cylinder 100. The cylinder heat insulating cylinder 100 is installed to open and close to the left and right to surround the outer peripheral surface of the gas cylinder 50 and to form a single flow path on the cylinder heat insulating cylinder main body 10 attached to the gas cylinder 50 and the inner wall surface of the cylinder heat insulating cylinder main body 10. Consists of tubes.

  FIGS. 2A and 2B are a plan view (A) in a state where the cylinder heat insulating cylinder body 10 according to an embodiment of the present invention is closed and a plan view (B) in an open state. FIG. 2 shows a state before the tube 20 is installed in the cylinder heat insulating cylinder body 10. As shown in FIG. 2A, the cylinder heat insulating cylinder body 10 is in a substantially cylindrical shape when closed by the fixing means 11, and has an inner diameter substantially equal to the outer diameter of the cylinder. As shown in FIG. 2 (B), the cylinder heat insulating cylinder body 10 is configured to be opened to the left and right by an opening / closing means 14 that opens and closes to the left and right, and a gas cylinder is placed around the cylinder. Fixing portions 12 and 13 for fixing the tube 20 may be formed on the outer wall surface of the cylinder heat insulating cylinder body 10.

  3A is a front view after the cylinder heat insulating cylinder 100 is attached to the gas cylinder 50, and FIG. 3B is a rear view. FIG. 3A corresponds to a view taken along the line B-B after the tube 20 is installed in the cylinder heat insulating cylinder body 10 in FIG. 2A and attached to the gas cylinder 50, and FIG. -Corresponds to the arrow A view.

  As shown in FIG. 3A, the cylinder heat insulating cylinder body 10 surrounds the outer peripheral surface of the gas cylinder 50 and is closed by a fixing means 11 that fixes the left part and the right part together. As the fixing means 11 provided on the outer surface of the cylinder heat insulating cylinder main body 10, a known fixing tool such as a so-called Patchon lock (or a snap lock), a buckle, or a chain can be used. In this embodiment, as shown in FIG. 3A, a patch-on lock is used in which the engaging portion 112 is hooked on the hook-like engaged portion 111 and fixed with a tension spring force. In particular, as the fixing means 11, a Patchon tablet that can adjust the length of the diameter of the cylinder heat insulating cylinder 100 is used.

  In this embodiment, an engagement portion 112 having a structure like a so-called butterfly bolt that can be tightened or loosened by hand is used as such a patch lock, and the engagement portion 112 is rotated to a length of about 2 cm. A known patch-on tablet that can be adjusted up to is used. In this way, by using the patch-on lock that can adjust the length of the diameter of the cylinder thermal insulation cylinder 100, the cylinder thermal insulation cylinder 100 can be fixed so that the tube 20 installed on the inner wall thereof is in close contact with the cylinder.

  In this embodiment, as the fixing means 11, a patch-on lock that can adjust the length of the diameter of the cylinder heat insulating cylinder 100 is used, but the fixing tool is not limited to this, and the left part of the cylinder heat insulating cylinder main body 10 Any object can be used as long as the right part can be fixed together. In this embodiment, as shown in FIGS. 1 and 3A, the fixing means 11 is installed in two places, but is not limited to two places, and depends on the size of the heat insulating cylinder body 10. Any number can be installed.

  As shown in FIG. 3 (B), the cylinder heat insulating cylinder body 10 is largely opened to the left and right by the opening / closing means 14 that opens and closes to the left and right. The opening / closing means 14 may be anything, but for example, a hinge is used. In this embodiment, since the left and right portions of the cylinder heat insulating cylinder 100 are configured to surround the cylinder, the opening / closing means 14 uses a hinge that opens 180 degrees or more to the left and right as shown in FIG. Further, in this embodiment, the opening / closing means 14 is installed at two places as in the case of the fixing means 11, but it is not limited to two places and any number may be installed.

  In addition, the material of the cylinder heat insulation cylinder main body 10, the fixing means 11, and the opening / closing means 14 can use the stainless steel material etc. which were excellent in corrosion resistance. For example, when the cylinder heat insulating cylinder body 10 is used in a 46.7 liter cylinder, it can be manufactured in a cylindrical shape having a height of 1100 mm, an outer diameter of 236 mm (inner diameter of 234 mm), and a wall thickness of 1.6 mm. If it is used for other size cylinders, it can be manufactured in a size suitable for that cylinder.

  4A is a development view of the left part of the cylinder thermal insulation cylinder 100, and FIG. 4B is a development view of the right part of the cylinder thermal insulation cylinder 100. FIG. 4A corresponds to the XX arrow view after the tube 20 is installed in the cylinder heat insulating cylinder body 10 in FIG. 2B, and FIG. 4B is the YY arrow view. Equivalent to. As shown in FIGS. 4A and 4B, the cylinder heat insulating cylinder body 10 is provided with a plurality of installation means 15 for installing the tube 20, and the tube 20 can be installed by the installation means 15. In addition, the tube 20 can also be detachably installed so that it can be removed even after fixing to the cylinder heat insulation cylinder main body 10. If the tube 20 is detachably installed, the hot water in the tube 20 can be easily removed, and the tube 20 can be replaced before the tube 20 deteriorates.

  The tube 20 is installed so as to form one flow path on the inner wall surface of the cylinder heat insulating cylinder body 10. In order for the contact surface of the tube 20 to be in close contact with the gas cylinder 50 and to efficiently heat it, the tube 20 is preferably installed evenly on the left and right portions of the inner wall surface of the cylinder heat insulating cylinder body 10. For example, as shown in FIGS. 4 (A) and 4 (B), the tubes 20 are installed symmetrically on both the left and right sides of the cylinder thermal insulation cylinder main body 10 so as to be bilaterally symmetrical, and they are connected to a joint 22 (for example, hexagonal). Socket) and connection tube 23 are used for connection to form one flow path. By arranging the tubes 20 in this way, the gas cylinder 50 can be uniformly heated. The arrangement of the tubes 20 depends on the allowable bending radius when the tubes 20 are, for example, flexible hoses. The number of tubes 20 to be used is not limited, and one or two tubes may be used, and one flow path may be formed by four or more tubes 20. In this embodiment, as shown in FIGS. 4A and 4B, the tubes 20 are arranged in a spiral shape on each of the left and right sides, but the present invention is not limited to this arrangement, and the types of the materials of the tubes 20 Depending on the situation, different arrangements may be used.

  FIGS. 5A and 5B are a left development view (A) and a right development view (B) showing an example of the arrangement of tubes different from FIG. 4 of the cylinder heat insulating cylinder. 5 (A) and 5 (B), the tubes 20 are arranged by being folded back multiple times so as to be parallel to the longitudinal direction on each of the left and right sides. The installation means 15 of the tube 20 in this case is only a bar-shaped metal fitting at two locations on the left and right sides perpendicular to the longitudinal direction. Compared with the arrangement of FIG. 4, the installation means 15 for the tube 20 is less, and the installation effort can be saved.

  In the present embodiment, as described above, the two tubes 20, the joint 22 and the connection tube 23 are connected to form one flow path, and the connection tube is connected to the heat insulating cylinder body 10 as shown in FIGS. 4 and 5. It is also possible to arrange the connecting tube 23 on the outside of the cylinder heat insulating cylinder main body 10 by arranging the holes 16 through which the left and right holes 23 pass, and penetrating the connecting tube 23 through the holes 16. By installing the connection tube 23 in this way, the tube 23 is not sandwiched when the heat insulating cylinder body 10 is opened and closed, and handling is easy. Moreover, the state of the hot water circulating in the tube 23 can be confirmed from the outside. Furthermore, in order to fix the connection tube 23 and the joint 22, a fixing portion 13 (see FIGS. 2 and 3A) can be provided on the outer wall surface of the cylinder heat insulating cylinder body 10.

  The inlet portion 21 and the outlet portion 24 of the tube 20 through which hot water enters and exits are both ends of the tube 20, and the positions of the inlet portion 21 and the outlet portion 24 may be either left or right. The inlet portion 21 and the outlet portion 24 may be installed on the inner wall surface of the heat insulating cylinder body 10, but as shown in FIGS. 3B and 4, the inlet portion 21 and outlet of the tube 20 are connected to the heat insulating cylinder main body 10. The holes 17 through which the portions 24 respectively penetrate may be provided, and the inlet portion 21 and the outlet portion 24 may be passed through the holes and installed on the outer wall surface of the cylinder heat insulating cylinder body 10. By installing the inlet portion 21 and the outlet portion 24 of the tube 20 on the outer wall surface of the cylinder heat insulating cylinder main body 10, it becomes easy to connect with a hot water circulation device to be described later, and the hot water can easily flow. Furthermore, in order to fix the inlet portion 21 and the outlet portion 24 of the tube 20, the fixing portion 12 that fixes the tube 20 and the joint 22 through the tube 20 to the outer wall surface of the cylinder heat insulating cylinder body 10 (see FIGS. 2 and 3B). ) Can also be provided.

  As described above, the tube 20 is installed in the cylinder thermal insulation cylinder main body 10. The installation means 15 for installing the tube 20 is, for example, a plastic binding band fixture (FIG. 4) or a metal attachment (FIG. 5). ) Can be used. In the case of FIG. 4, the installation means 15 can easily attach the tube 20 of the cylinder heat insulating cylinder body 10 by arranging a hole at the attachment location. Moreover, it is preferable to use a band fixture that can be adjusted to match the diameter of the tube 20. 3 and 4, only a part of the installation means 15 is shown for the sake of simplicity, but only the part necessary for installing the tube 20 is used. In the case of the present embodiment, as shown in FIGS. 4A and 4B, 44 installation means 15 are used. In the case of the arrangement shown in FIG. 5, only two rod-like metal fittings are used on the left and right sides perpendicular to the longitudinal direction.

  The tube 20 may be any tube 20 as long as it has good thermal conductivity and can flow hot water at a temperature lower than the legal temperature (40 ° C. or lower). In the example shown in FIG. 4, a flexible vinyl hose is used as the tube 20. The material of the hose may be any material such as soft vinyl chloride, silicone rubber, polyurethane resin, nylon, but in this embodiment, soft vinyl chloride material is used. The dimensions are an inner diameter of 10 mm, an outer diameter of 16 mm, a length of about 10 m, a use range temperature of −5 ° C. to 60 ° C., and a maximum use pressure of 1 MPa. In addition, the weight of the cylinder heat insulating cylinder 100 of the present embodiment is 15 kg, which is lighter than a conventional heat insulating apparatus.

  In the example shown in FIG. 5, a stainless steel tube is used as the tube 20, and a flexible material tube is used as the connection tube 23. The stainless steel tube can be bent and installed on the connecting means 15 as shown in FIG. However, when a stainless steel tube is used as the tube 20, it cannot be easily removed, and the weight is increased as compared with the case of using a vinyl hose.

[Configuration of the cylinder heat insulating device 300]
Next, the cylinder heat insulation apparatus 300 provided with the cylinder heat insulation cylinder 100 of this invention is demonstrated. FIG. 6 is an explanatory diagram showing the configuration of the cylinder heat retaining device 300 of the present embodiment. The cylinder heat insulating device 300 includes a cylinder heat insulating cylinder 100 and a hot water circulation device 200 that is connected to the inlet portion 21 and the outlet portion 24 of the tube 20 and flows a fluid at a predetermined temperature through the tube 20 for circulation.

  As shown in FIG. 6, the hot water circulation device 200 includes at least a water tank 210, a heater 220, a pump 230, and a pipe 240. The water tank 210 is preferably a water tank 210 that is surrounded by a heat insulating material that accumulates a predetermined amount of water and keeps the heat insulation state for a predetermined time. Moreover, the heater 220 can use the heater with the temperature adjustment function of water. In this embodiment, a heater that can adjust the water temperature to 40 ° C. or less is used.

  The pump 230 can use a pump that draws warm water from the water tank 210 and obtains a predetermined discharge amount. For example, when the flow rate of warm water flowing through the tube 20 of the cylinder heat retaining cylinder 100 is maintained at 10 liters / minute, the pump 230 that pumps warm water so as to maintain the flow rate is used. The pump 230 is connected to the inlet portion 21 of the cylinder heat insulating cylinder 100 via the pipe 240, and the outlet portion 24 of the cylinder heat insulating cylinder 100 is connected to the water tank 210 via the pipe 240. In addition, the piping 240, the inlet part 21, and the outlet part 24 can each be connected using a joint (for example, hexagon socket).

  The water tank 210 is not limited to the above-described water tank that retains and retains heat, but may be a water tank having a built-in heater 220 and having a temperature adjusting function, or may be a water tank having a built-in pump 230 and has a stirring function. It may be an aquarium. In addition, since the power supply used for the hot water circulation device 200 needs to be separated from the gas cylinder 50 by a legal distance (2 m) or more, the length of the pipe 240 and the installation location of the hot water circulation device 200 are adjusted so as to keep the distance. . When a plurality of gas cylinders 50 are used, the gas cylinders 50 may be equipped with the cylinder heat insulating cylinders 100 and the hot water in the cylinder heat insulating cylinders 100 may be circulated by one hot water circulation device 200. .

[How to use the cylinder heat insulating device 300]
Next, the usage method of the cylinder heat retention apparatus 300 is demonstrated. Before starting to use the gas cylinder 50, the cylinder heat insulating cylinder 100 is attached to the gas cylinder 50. As shown in FIG. 2 (B), the cylinder heat insulating cylinder 100 is attached to the gas cylinder by opening it to the left and right by the opening / closing means 14, enclosing the outer peripheral surface of the gas cylinder 50, and closing the left and right. Can do. At this time, the fixing means 11 is adjusted to close the left part and the right part so that the tube 20 installed on the inner wall surface of the cylinder heat insulating cylinder 100 is in close contact with the gas cylinder 50.

  Thereafter, the cylinder heat insulating cylinder 100 is connected to the hot water circulation apparatus 200 and the hot water circulation apparatus 200 is turned on to operate, and hot water having a temperature of 40 ° C. or lower (for example, 30 ° C.) is circulated through the cylinder heat insulating cylinder 100. Before installing the cylinder thermal insulation cylinder 100 in the gas cylinder 50, the hot water circulation apparatus 200 may be connected to the cylinder thermal insulation cylinder 100, and the heater 220 of the hot water circulation apparatus 200 may be operated to warm water to a predetermined temperature. . The hot water circulation device 200 adjusts the temperature so that the gas cylinder 50 can be kept warm with predetermined hot water while the hot water is circulated through the cylinder heat insulating cylinder 100.

  After the gas cylinder 50 has been used and used up to the end, the hot water circulation device 200 is turned off, the cylinder heat retaining cylinder 100 is opened to the left and right, and the gas cylinder 50 is replaced. In this way, the necessary number of gas cylinders 50 can be replaced, and the gas cylinders 50 can be used up to the end.

  As described above, since the cylinder heat insulating cylinder 100 of the present invention uses the tube 20, it can be manufactured at a lower cost and can be lighter than a conventional heat insulating device that forms a passage in the main body. . Thereby, the cylinder heat insulating cylinder 100 can be easily carried and can be easily attached to the gas cylinder 50.

  Further, the tube 20 can be fixed so as to be in close contact with the gas cylinder 50 by adjusting the fixing means 11 of the cylinder heat insulating cylinder 100. Further, by using the cylinder heat insulating cylinder 100 and the hot water circulation device 200, the gas cylinder 50 can be efficiently heated using water having a predetermined temperature. Thereby, the gas in the gas cylinder 50 can be used up to the end.

  In addition, the cylinder heat insulation cylinder and the cylinder heat insulation apparatus of the above-described embodiment are examples, and the configuration can be appropriately changed without departing from the gist of the invention.

DESCRIPTION OF SYMBOLS 10 Cylinder insulation cylinder main body 11 Fixing means 14 Opening / closing means 15 Installation means 20 Tube 21 Inlet part 22 Joint 23 Connection tube 24 Outlet part 50 Gas cylinder 100 Cylinder insulation cylinder 200 Hot water circulation apparatus 210 Water tank 220 Heater 230 Pump 240 Piping 300 Cylinder insulation apparatus

Claims (7)

Open and close the left and right surround the outer peripheral surface of the gas cylinder, the cylinder insulating cylinder body attached to the gas cylinder, the form one flow path on the inner wall surface of the cylinder heat insulating cylinder body, a tubular to be installed so as to be in close contact with the gas cylinder A tube, and
The cylinder heat insulation cylinder body is
Opening and closing means for opening and closing the cylinder heat insulating cylinder body in a semicircular left part and a semicircular right part,
Fixing means for closing and fixing the left part and the right part;
Installation means for installing the tube;
A cylinder heat insulation cylinder characterized by comprising:   2. The cylinder heat insulating cylinder according to claim 1, wherein the fixing means is capable of adjusting a length of a diameter of the cylinder heat insulating cylinder.   The cylinder heat insulation cylinder according to claim 1 or 2, wherein the tube is detachably installed on the cylinder heat insulation cylinder main body. It is the cylinder heat insulation cylinder in any one of Claims 1-3, Comprising: The said tube has multiple pieces,
The cylinder heat insulating cylinder characterized in that the tubes are respectively installed on the left and right portions of the cylinder heat insulating cylinder main body, and the two tubes are connected by a joint and a connecting tube to form one flow path. .   5. The cylinder heat insulating cylinder according to claim 4, wherein two holes through which the connection tube passes are formed in the heat insulating cylinder main body, and the connection tube is penetrated through the hole to be installed outside the cylinder heat insulating cylinder main body. Cylinder heat insulation cylinder characterized by that. It is a cylinder heat insulation cylinder in any one of Claims 1-5, Comprising: The hole which the inlet_port | entrance part and exit part of the said tube each penetrates in the said heat insulation cylinder main body, The said inlet part and the said outlet part are said holes. A cylinder heat insulating cylinder, wherein the cylinder heat insulating cylinder is installed on the outer wall surface of the cylinder heat insulating cylinder main body.   The hot water circulation which connects to the inlet part and the outlet part of the tube of the cylinder thermal insulation cylinder according to any one of claims 1 to 6, and flows and circulates water at a predetermined temperature through the tube. And a cylinder heat retaining device.