JPH0814359B2 - Tube for cryogenic piping of beauty and medical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION “Object of the Invention” The present invention relates to the creation of a cryogenic piping tube for beauty and medical equipment, which is a liquefied gas or a liquid such as a liquid under an extremely low temperature of −40 ° C. or lower. Alternatively, it is lightweight as a conduit for a device that uses a substance that flows as a gas for the purpose of medical treatment, beauty treatment, sports, etc., and maintains excellent operability with favorable flexibility under the cryogenic conditions, and has a low heat loss. In addition, it is intended to provide a highly durable tube.

Industrial Application Pipeline for transporting cryogenic fluid such as liquefied gas in medical or beauty equipment Conventional technology As pipe material for transferring liquefied gas or cryogenic fluid such as vaporized, nickel or stainless steel Metal pipe materials such as alloy materials are used. That is, such a conventional one is a pipe line for transferring liquefied gas between fixing mechanisms, for example, from ammonia liquefied gas such as −33.4 ° C.
Various liquefied gases such as 269 ° C. helium liquefied gas can be effectively transferred.

Problems to be Solved by the Invention However, it is clear that the liquefied gas as described above should not be ejected only from the fixed nozzle, and it may be required to eject the liquefied gas at an appropriate position while moving the nozzle.
That is, recently, such cryogenic fluids are being used for medical treatment, sports, beauty, treatment of affected areas, etc. In such a case, the position and direction of the jet nozzle can be freely manipulated. However, it is obvious that it is difficult to obtain this preferable operability with the alloy made as described above. Of course, it is conceivable to use a tubular body made of a plastic material, but it hardens and becomes brittle under the temperature conditions as described above, and cannot be used. In addition, the cold heat loss is relatively large, the thickness of the heat insulating layer that must prevent this is also large, and the tube has a large diameter, which requires both lightness and flexibility and small diameter. In any case, it is unsuitable on the road and poor in operability. In order to supply the required amount smoothly, it is necessary for the inner diameter to be relatively large, especially when it is supplied in a vaporized state, and from this also an increase in diameter cannot be avoided. Furthermore, for example, when a cryogenic fluid of about −100 ° C. is to be jetted using liquefied nitrogen and liquefied oxygen, the conventional temperature condition cannot be obtained without jetting for several minutes with the conventional one, and expensive liquefaction during that time is required. There is no choice but to lose oxygen.

"Structure of the Invention" Means for Solving the Problems The present invention was devised to solve the above-mentioned problems of the conventional ones, and a stretching treatment of a polytetrafluoroethylene resin having inner pores. The fiber leakage prevention material layer is formed by partially polymerizing the edges of the tape-shaped synthetic resin film with a thickness of 0.5 mm or less in a tube made of fiberized porous material and wound in a spiral shape to enclose the fluid leakage. A cryogenic piping tube for beauty and medical equipment, characterized in that a heat insulating material is encapsulated on the preventive material layer, and a fiber protective layer is covered on the outer surface of the heat insulating material encapsulating layer.

The fibrous porous synthetic resin tube having working pores avoids hardening or embrittlement of the synthetic resin material even at a cryogenic temperature due to its fibrous and porous structure.

As a fluid leakage prevention material, the tape-shaped synthetic resin film having a thickness of 0.5 mm or less is partially polymerized and spirally wound, so that the total number of tubes does not increase further, and Achieves fluid leakage prevention under conditions that ensure the flexibility of the piping tube.

The heat insulating material prevents the leakage of vaporized cryogenic fluid from the inside of the fibrous porous synthetic resin tube, and the fibrous porous tube prevents the cryogenic fluid and the leakage preventive material from leaking. Since direct contact with the heat insulating material is avoided, they are hardened and brittle little, and the flexibility as a whole is hardly impaired regardless of the flow of the cryogenic fluid. Protects the outer surface of such an internal tube to provide a highly durable flexible tube.

EXAMPLE A specific example of the present invention is as shown in the accompanying drawings, in which the first and second fiberized porous synthetic resin tubes 1 having inner holes 14 for passing a cryogenic fluid are provided.
As shown in the figure, the fluid leakage prevention material 2 and the heat insulating material 3 are encapsulated, the fiber protective layer 4 is covered on the outer side of the heat insulating material layer 3, and the end portion thereof is covered with a fastening material 12 made of silicone rubber or the like. It is fastened.

The above-mentioned fibrous porous synthetic resin tube 1 is obtained by stretching or rolling a synthetic resin piece to form a fiber between minute nodes by stretching or rolling, and a fiber is formed by stretching a polytetrafluoroethylene resin. The porous microstructure itself is breathable, but its fine porous structure provides sufficient flexibility even under the cryogenic conditions as described above, and it is lightweight, and any of these is used. From the point of view, it has excellent operability. By enclosing the fluid leakage prevention material 2 and the heat insulating material 3 in such a tube 1, heat can be cut off from the ambient temperature condition of the outside air, and the inside of the inner hole 14 maintaining the cryogenic condition. Obtain fluid passage. The fluid leakage prevention material 2 and the heat insulation material 3 can be combined with a metal foil piece or a metal vapor deposition layer to form a heat blocking layer that also includes radiant heat, but the inner surface thereof is as described above. Since the tube 1 having a fiberized porous structure avoids direct contact with a cryogenic fluid, even if it is a synthetic resin, it hardly sees hardening or brittleness due to cryogenic conditions, and its flexibility Hardly changes. Of course, even if the cryogenic fluid in the inside is partially vaporized, it does not leak from the fiberizing tube 1 by the fluid leakage prevention material 2.

As the above-mentioned metal foil piece, an aluminum foil scale piece or the like is used, and it is possible to adopt a method in which a coating material in which the aluminum foil scale piece is generally dispersed and mixed is applied, or other appropriate method is used.

The fiber material obtained by the stretching treatment of the above-mentioned polytetrafluoroethylene resin as the tube 1 forms fine fibers in the shape of a web by stretching the layered product of the resin in one direction or more. Moreover, a knot having a size of, for example, about 1 to 400 μm is formed between the fine fibers. Due to the formation of such fine fibers, the fine fibers having a porosity of 40 to 97% are finely connected. It is considered that the structure has pores, and the size of the micro through holes between such fibers is 0.1 μm or more and about 5 μm at the maximum.
It is one that does not allow liquid to pass through while ensuring air permeability, and furthermore, due to the above fiberization, it can withstand even extremely low temperature conditions, and for example, it can withstand temperature conditions such as -240 ° C. Can withstand enough.

As the leakage prevention material 2, a thin material having a thickness of 0.5 mm or less is sufficient, and making the layer as thin as possible makes it possible to reduce the diameter of the entire tube and improve operability. A preferred example of such a leakage preventive material 2 is a polyester resin film, which is generally formed by winding a tape-shaped material having a thickness of 0.5 mm or less in a spiral shape as shown in the drawing. It is not necessary to further limit the width of the tape-shaped material, but at least
One having a width of 10 mm or more is partially (for example, about one half of the width) polymerized and wound. Of course, this leakage prevention material 2
May be wound in two or more layers with a small thickness of 0.3 mm or less. In that case, the winding directions of the first and second layers should be reversed as shown in FIG. Is preferred. In any case, the tape-shaped synthetic resin film wrapped as described above fits well with the tube made of fibrous porous material, ensures its flexibility appropriately, and has a waterproof function even under its flexible condition. To form a secured layer of. Regarding the heat insulating material 3, for example, in the case of a fluid such as −40 to 80 ° C., a cellular tissue material may be used, but when a lower temperature fluid is targeted, it is preferable to use a cotton-like aggregate of fine fibers, This product exhibits a behavior or characteristics well-known to those of the above-mentioned fibrous porous synthetic resin tube 1 under low temperature conditions, and can obtain both flexibility and lightness of the product. As a material for forming the heat insulating material 3, an inorganic material such as glass fiber is preferable, but a synthetic fiber or a natural fiber may be used depending on an application temperature, such as a polyurethane-based material, a polyester-based material, a nylon-based material, or a polyolefin-based material. A fluororesin-based material is used, and its thickness is preferably about 5 mm, which is suitable for ensuring the heat insulating property and the small diameter of the entire tube.

As described above, it is preferable that the heat insulating material 3 using the cotton-like aggregate is used in combination with the thin layer sheet material 3b so as to be stably wound around the leakage prevention material 2 as described above. That is, the cotton-like aggregate 3a can be stably wound in a state where the cotton-like aggregate 3a is kept in a predetermined thickness without being divided. The porosity is preferably about 30 to 90%, including the case where a cell structure is used, but it is particularly preferable to set the porosity to 50% or more, and the thickness is about 5 to 30 mm.

Further, it is preferable that an aluminum foil piece or a vapor deposition layer 13 thereof is formed on the heat insulating material 3 or the leakage preventing material 2 to reflect the radiant heat. Can be selected to any position up to the outer surface, possibly with a plurality of layers interposed.
The thin sheet material 3b as described above may be substituted by the leak preventive material 2 described above in some cases, and accordingly, the heat insulating material 3 is covered with the leak preventive material 2 and the radiant heat reflective layer 13 on the front and back. Can be adopted as.

On the outer surface of the heat insulating material 3, that is, the outermost surface of the tube of the present invention, the fiber protective layer 4 woven or braided using the fiber yarn made of synthetic or natural fiber is formed. The fiber protective layer 4 may be the fiber itself, but it is for preventing the tube from being damaged even if it comes into contact with another object, and the yarn direction is inclined with respect to the length direction of the tube. It is preferable to employ a material that is woven or braided in the state of being crossed with each other. That is, such a structure does not impede the flexibility of the tube as the fiber protective layer 4, and the protective layer 4 has elasticity so that it can be stably attached to the outer surface of the heat insulating material 3 as described above. Even if the heat insulating material 3 and the leakage preventing material 2 are not adhered with an adhesive or the like, they are prevented from partially floating or fraying, and sufficient durability can be obtained. By winding a woven material, for example, in the form of a tape around the outer surface of the heat insulating material 3 in a spiral shape, the yarns or fibers of the woven fabric are inclined with respect to the length direction of the tube,
Since it is a so-called bias, elasticity is also obtained. The material of the reinforcing layer 4 may be any of organic, inorganic, natural or synthetic fibers such as plants or animals. A preferred example is a fluororesin-based fiber containing polytetrafluoroethylene, and thus the fluororesin-based reinforcing layer 4 is obtained as an excellent one in chemical resistance, heat resistance and the like.

According to the present invention as described above, when specifically used as a flexible flow path for a cryogenic fluid, a connector 6 is attached to both ends of a tube 7 of the present invention as shown in FIG. It is connected to the cryogenic fluid supply source side, and the other is connected to a nozzle or other discharge part.

Of course, it is preferable that a part or all of it is covered with a coil spring 8 as shown in FIG. 4 so as to protect the tube 7 of the present invention from being partially bent excessively.
Attach a hood 10, etc. on the to ensure stable discharge use.
The attachment angle of the discharge head 9 with respect to the main part of the tube 7 is practically an obtuse angle, particularly preferably 120 to 150 °. Such an angle is covered by the rigid gripping tube 15 formed at the end of the tube 7. It can be easily formed without damaging the flow resistance by wearing. The gripping tube 15 is used as a gripping portion for the operator, and allows proper use. As an example, a case where a mixed gas of liquefied nitrogen (LN ₂ ) and liquefied oxygen (LO ₂ ) is used as a cryogenic agent and a cryogenic gas is used as a therapeutic device, a beauty device, or for sports,
The cryogenic fluid composed of LN ₂ and LO ₂ is generally -150 to -170.
For ultra-low temperature conditions such as ℃, the thickness of this product is 10mm on the inside and 1mm on the outer circumference of the fiberized porous synthetic resin tube.
After forming two layers of leakage preventive material spirally wound with a tape-shaped polyester resin film of 0.5 mm or less as a single layer, an aluminum vapor deposition layer is formed on the outer surface and a thin woven cloth of resin fibers is attached to the inner surface. Covered with a cotton-like heat insulating layer 3 made of glass fiber having a thickness of 5 mm, and a protective layer 4 having a thickness of 1 mm was applied to the outermost surface to have an outer diameter of about 28 mm and a length of 2 m. The main idea of the present invention is to discharge the fluid to the affected area by the tube and rapidly cool it, and increase the blood flow rate by this rapid cooling (for example, when entering a sauna, it is 1.5 times the normal blood flow volume, whereas when such rapid cooling is performed, normal blood flow is increased. Quantity 3-4
When used for the purpose of improving beauty and treating chronic rheumatism for the purpose of (doubling), the flexibility of the tube hardly changes, and it is possible to secure a stable and stable operability of the discharge nozzle. It was

When the target cryogenic fluid is discharged in the above-mentioned tube (2 m long), the cryogenic temperature is reached in about 1 min, which is significantly shorter than the conventional one which reaches several minutes.

That is, in the conventional one, since the heat insulating property is not sufficiently obtained as in the present invention, by continuing the discharge for several minutes, the entire tube is gradually brought to a cryogenic temperature from the cryogenic fluid supply source side. Since the cryogenic fluid is used for the purpose of use after reaching the target cryogenic temperature up to the nozzle portion, the intended use cannot be achieved during that time, and there is a large waiting time in actual use. Inevitably, it becomes uneconomical because it consumes expensive cryogenic fluid. According to the present invention, by setting this to about 1 minute, the waiting time can be greatly shortened, and the amount of wasteful loss of expensive cryogenic fluid can be greatly reduced.

"Effect of the invention" According to the present invention as described above, it is possible to ensure effective flexibility under cryogenic conditions, and moreover, since it is mainly composed of a synthetic resin system having a fine porous structure, it is lightweight, Further, even if the entire outer diameter of the tube is relatively small, a relatively large inner diameter is formed to perform effective supply, that is, any one of them has a operability that is extremely low in a cosmetic or medical device. Since it is possible to provide a fluid tube, it is an invention having a great effect industrially.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a cross-sectional view of a tube according to the present invention, FIG. 2 is a side view of a part of the tube, and FIG. Fig. 4 is a vertical sectional view and Fig. 4 shows the discharge head attached
It is a side view about an example. However, in these drawings, 1 is a fiberized porous synthetic resin tube, 2 is a fluid leakage prevention layer, 3 is a heat insulating material layer, 4 is a fiber protective layer, 6 is a connector, 7 is the present tube, 8 is a coil spring, and 9 is Discharge head, 10 is a hood.

Claims (1)

[Claims] 1. A spirally formed by partially polymerizing an edge portion of a tape-shaped synthetic resin film having a thickness of 0.5 mm or less on a tube made of a fibrous porous material obtained by stretching a polytetrafluoroethylene resin having an inner hole. A wound fluid leakage prevention material layer is encapsulated, a heat insulation material is encapsulated on the fluid leakage prevention material layer, and a fiber protective layer is covered on the outer surface of the heat insulation material encapsulation layer. Tube for cryogenic piping of beauty and medical equipment.