JP4751334B2 - Fever hose - Google Patents

Description

【Technical field】
[0001]
The present invention relates to a heat generating hose and a method for manufacturing the same. More specifically, the heat generating hose of the present invention is suitably used for heating a material to be heated that passes through or is filled in the hollow portion.
[Background]
[0002]
There has been proposed a heat generating hose in which a linear heating element is provided on the wall surface of the water supply hose to prevent water from freezing in the water supply hose at a low temperature (see Patent Documents 1 and 2). According to such a heat generating hose, the water in the hose is heated, so that the water does not freeze in the hose at a low temperature. Thereby, clogging of the hose, breakage of the hose, etc. can be prevented. Such a heat generating hose is used, for example, as a water supply hose for an automatic car wash machine in a car wash. Patent Documents 3 and 4 show other hoses having a heat generating action.
[0003]
[Patent Document 1]
JP-A-8-247346 [Patent Document 2]
JP-A-8-247347 [Patent Document 3]
JP 2004-162827 A [Patent Document 4]
JP 2001-99363 A DISCLOSURE OF THE INVENTION
[Problems to be solved by the invention]
[0004]
In a conventional heat generating hose, a linear heating element is incorporated in the hose, and a heated material such as water passing through the hose is heated. However, since the linear heating element is incorporated in the hose, its configuration becomes complicated, and it takes time and effort to manufacture. Moreover, it was not advantageous in terms of cost. SUMMARY OF THE INVENTION An object of the present invention is to provide a heat generating hose having a simple configuration, which does not require much labor for manufacturing, and is advantageous in terms of cost, and a method for manufacturing the same.
[Means for Solving the Problems]
[0005]
In order to achieve the above object, the exothermic hose of the present invention employs the following means. That is, a material made of an organic elastomer or natural rubber that forms a flexible non-conductive hose body and a heat generating layer material in which a conductive material such as carbon black is kneaded with the organic elastomer are supplied to the heat generating layer. A heat generating hose obtained by extrusion molding of two colors using an electrode made of a linear conductive wire as an insert, wherein the heat generating layer is continuous in the longitudinal direction in a state where a part of the hose body is cut out around the hollow portion. The electrode is characterized in that it is continuously embedded in the longitudinal direction in each of the end portions cut out of the part.
In the case where a side hole for discharging the material to be heated is required, the heat generating layer is provided so as to communicate with the hollow part at a part where the part of the heat generating layer is notched. Further, when the heat storage material is filled in the hollow portion, it is desirable that the heat storage material is a polymer material such as gelled paraffin.
The heat generating hose manufacturing method of the present invention includes a non-conductive flexible hose body having a hollow portion and made of organic elastomer or natural rubber, and a heat generating layer in which a conductive material such as carbon black is kneaded with organic elastomer. An electrode made of a linear conductive wire that is continuously embedded in the longitudinal direction in a state where a part of the hose body is cut out in the periphery of the hollow part and supplies power to the heat generating layer. In the structure in which the notched end portions are continuously embedded in the longitudinal direction, the material forming the hose body and the kneaded material forming the heat generating layer are inserted into the linear conductive wire serving as the electrode. These materials are subjected to a two-color extrusion molding machine and extruded into the structure.
【The invention's effect】
[0006]
In the above configuration, power is supplied to the heat generating layer through the electrodes. As a result, the heat generating layer generates heat. The generated heat is transmitted to the hollow portion through the hose body covering the heat generating layer, and the inside of the hollow portion is heated. The heated material can be suitably heated by allowing the heated material to pass through or filling the hollow portion. The heat generating hose in the present invention can be easily manufactured because the hose body and the heat generating layer are integrally formed by two-color extrusion molding using an electrode as an insert. Moreover, since it can be easily cut to a desired length, it is easy to adjust the length according to the application and installation location, and the usability is good.
BEST MODE FOR CARRYING OUT THE INVENTION
[0007]
Hereinafter, the constituent requirements of the heat generating hose in the present invention will be described in detail. (Hose body) The material of the hose body is preferably a non-conductive and flexible material. For example, known materials such as ERT (ethylene propylene terpolymer), rubber materials such as butyl rubber, organic elastomers such as urethane elastomers, synthetic resins such as phenol resins, and natural resins such as natural rubber can be used. The shape of the hose body is a tube shape having a hollow portion continuous in the longitudinal direction. The hollow portion can conduct a fluid such as water or can be filled with a heat storage material. Further, the hose body includes a heat generating layer described later. The heat generating layer is embedded in the hose body. Therefore, the heat generating layer and the hollow portion are isolated by the hose body. That is, the hose body also serves as a protective layer for protecting the heat generating layer from the hollow portion and the outside. The hose body may be provided with a side hole communicating with the hollow portion on the side surface. According to this configuration, the fluid that conducts through the hollow portion can be discharged from the side hole. The shape of the side hole can be determined in consideration of the shape, application, installation location, and the like of the heat generating hose. As long as the side hole is located at a position where the heat generating layer is not exposed by the side hole, the side hole can be arranged in consideration of the traveling direction of the fluid discharged from the side hole.
[0008]
(Heat generation layer) The material of the heat generation layer is a heat generating composition in which a conductive material is dispersed in a binder material. Binder materials include rubber materials such as EPT (ethylene propylene terpolymer), butyl rubber, organic elastomers such as urethane elastomers, thermosetting synthetic resins such as phenolic resins, and synthetic resins such as thermoplastic resins such as polyvinyl alcohol. it can. Among them, it is preferable to use an organic elastomer. This is because flexibility and impact resistance can be given to the heat generating hose. As the conductive material, general-purpose materials such as graphite, carbon black, carbon fiber, mesocarbon microbeads, and carbon nanomaterials can be used. In addition to the above, the material of the heat generating layer may be a mixture of other auxiliary agents such as a stabilizer, a foaming material, a reinforcing material, and a coloring agent.
[0009]
An exothermic composition can be prepared by kneading the above materials. The heat generating layer is formed so as to be embedded in the hose body by extrusion molding together with the exothermic composition and the resin forming the hose body described above. The arrangement of the heat generating layer is not particularly limited, but is preferably arranged so as to cover the hollow portion. This is because the heat conduction efficiency to the hollow portion is increased.
[0010]
(Electrode) Any shape and structure can be adopted as long as the electrode can supply power to the heat generating layer and generate heat. In one embodiment of the present invention, a linear conductive wire is employed as the electrode. The linear conductive wire is embedded in the heat generation layer along the longitudinal direction of the heat generation hose, and is connected to the power source at the end of the heat generation hose. Thereby, electric power is supplied to the heat generation layer substantially evenly in the longitudinal direction of the heat generation hose.
[0011]
(Heat storage material) In another embodiment of the present invention, the hollow portion is filled with a heat storage material. The heat storage material is not particularly limited as long as it can store the heat generated by the heat generation layer, and a known material can be adopted. For example, a polymer material such as gelled paraffin can be used as the heat storage material.
[0012]
The heat generating hose of the present invention can be integrally formed by extruding the hose body, the heat generating layer and the electrode. The shape of the exothermic hose itself may be, for example, a circular cross-sectional shape such as a circle, an ellipse, a circle or a part of an ellipse, or a polygon such as a triangle or a quadrangle. Further, the heat generating hose may have a constant vertical cross-sectional shape in the longitudinal direction or may be different. For example, consider the installation location and application, such as the shape of the longitudinal section of the heat generating hose that gradually increases from one end to the other, or the shape that both ends are circular and gradually flatten toward the center. Can be determined. Furthermore, it can cut | disconnect to desired length according to an installation place, a use, etc. Moreover, you may cut | disconnect to predetermined length considering the convenience of distribution | circulation and conveyance. On the other hand, the heat generating hose may be connected by using a joint member for connecting the heat generating hose. For example, the joint member may include two connecting portions with the heat generating hose, and the connecting portions may be arranged back to back so that the heat generating hose can be extended in the linear direction. In addition, the joint member may be Y-shaped, T-shaped, cross-shaped, etc., and a heat generating hose can be connected to the end thereof, so that three or more heat generating hoses can be connected to one joint member. good. By using such a joint member, even when a heat generating hose having a predetermined length is used, it becomes easy to make the shape of the entire heat generating hose suitable for its use and installation location.
[Example 1]
[0013]
Examples of the present invention will be described below. FIG. 1A shows a perspective view of a heat generating hose 1 according to an embodiment of the present invention. The aa longitudinal cross-sectional view in FIG. 1A is shown to FIG. 1B. Moreover, the bb longitudinal cross-sectional view in FIG. 1B is shown to FIG. 1C. As shown in FIGS. 1A, 1 B and 1 C, the heat generating hose 1 includes a hose body 2, a heat generating layer 3, a hollow portion 4, an electrode 5 and a side hole 6. The material of the hose body 2 is EPT. The shape of the hose body 2 is a hollow shape having a hollow portion 4. Furthermore, the heat generating layer 3 is embedded in the hose body 2 uniformly in the longitudinal direction. Further, as shown in FIG. 1B, a side hole 6 is provided near the top of the side surface of the hose body 2. The side hole 6 communicates with the hollow portion 4 and is arranged at a predetermined interval.
[0014]
The heat generating layer 3 is obtained by dispersing carbon black in a composite material of EPT and butyl rubber. The blending amount of carbon black can be appropriately selected according to the required calorific value. In this example, 5 to 10 parts by weight of carbon plaques were blended with respect to 100 parts by weight. As shown in FIG. 1C, the heat generating layer 3 is arranged in a region where a part of the peripheral region of the hollow portion 4 is cut away (except for the vicinity of the top in the drawing). Therefore, the side hole 6 does not prevent the heat generation layer 3 from being protected by the hose body 2.
[0015]
The electrode 5 is embedded in the heat generating layer 3. The electrode 5 is made of flat braided copper wire and is continuous from one end side to the other end side of the heat generating hose 2. The electrode 5 is electrically connected to a power source (not shown) at one end of the heat generating hose 2 and supplies power to the heat generating layer 3. The electrode 5 is disposed near the two upper ends of the heat generating layer 3 in the cross-sectional view shown in FIG. 1C. The vicinity of the top of the heat generating layer 3 is not continuous and is insulated by the hose body 2. Therefore, the current flowing to the heat generating layer 3 by the electrode 5 flows through the entire heat generating layer 3.
[0016]
One end side (not shown) of the exothermic hose 1 is connected to a water faucet, and water can be conducted to the hollow portion 4. On the other hand, on the other end side (not shown), the end of the hollow portion 4 is closed by a fitting part. Therefore, the water that conducts through the hollow portion 4 is discharged from the side hole 6.
[0017]
The exothermic hose 1 is manufactured as follows. That is, a composite material in which carbon black, EPT, and butyl rubber are kneaded is prepared as a heat generation layer forming material, EPT is prepared as a hose body forming material, and these materials are used with a linear conductive wire serving as an electrode 5 as an insert. Extrude into the shape shown in FIG. 1 through a color extrusion machine. After cooling, the side holes 6 are opened at predetermined intervals.
[0018]
According to the heat generating hose 1 manufactured in this way, water is conducted from the tap faucet connected to one end of the heat generating hose 1 to the hollow portion 4. Further, power is supplied from the power source to the heat generating layer 3 through the electrode 5. Thereby, the heat generating layer 3 generates heat. The heat generated by the heat generating layer 3 propagates to the water that conducts through the hollow portion 4 and heats the water. The heated water is discharged from the side hole 6 to the outside.
[0019]
The exothermic hose 1 is installed, for example, at a side end of a road, a side edge of a railroad track, a parking lot, or the like. Since heated water is discharged from the side hole 6 of the heat generating hose 1, it is possible to melt the snow accumulated on the road surface or on the track during snow accumulation. Moreover, since the heat generating hose 1 itself also generates heat, it is possible to prevent water melted by snow from freezing on the road surface or the track. Moreover, you may install the heat generating hose 1 on a roof. By doing in this way, the snow accumulated on the roof at the time of snowfall can be melted and removed from the roof. This makes it possible to remove snow on the roof easily and safely.
[Example 2]
[0020]
FIG. 2 shows a cross-sectional view of a heat generating hose 10 that is another embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member same as the above-mentioned exothermic hose 1, and the description is abbreviate | omitted. As shown in FIGS. 1A, B and C, the heat generating hose 10 includes a hose body 20, a heat generating layer 30, a heat storage material 7 and an electrode 5. The material of the hose body 20 is EPT. The hose body 20 has a hollow shape with a hollow portion. The hollow portion is filled with a heat storage material 7. Furthermore, the heat generating layer 30 is embedded in the hose body 20 uniformly in the longitudinal direction. The material of the heat storage material 7 is gelled paraffin. Since the heat generating hose 10 includes the heat storage material 7, the heat generating hose 10 is heated in advance and the heat is accumulated in the heat storage material 7 to release the heat. By doing so, it can be used as a heat storage and heating appliance. If the deformability as a hose is utilized, the heating target can be arbitrarily selected, and the generality is excellent. For example, it can be laid under a nap bed such as a large truck, heated with electric power generated while the truck is running, and used as a heat storage heater when the driver takes a nap while the truck is stopped. Similarly, when laying on the floor of a house, the hose is heated with nighttime electric power and heated using the stored heat.
[0021]
The heat generating layer 30 is obtained by dispersing carbon black in a composite material of EPT and butyl rubber. The blending amount of carbon black can be appropriately selected according to the required calorific value. In this example, 3 to 5 parts by weight of carbon black was blended with respect to 100 parts by weight. The heat generating layer 30 is disposed in a region excluding a part (near the upper portion of the heat storage material 7 shown in FIG. 2) in the peripheral region of the heat storage material 7.
[0022]
The electrode 5 is embedded in the heat generating layer 30 and is continuous from one end side to the other end side of the heat generating hose 20. The electrode 5 is disposed near the two upper ends of the heat generating layer 30 in the cross-sectional view shown in FIG. The heat generating layer 30 is insulated by the hose body 20 in the vicinity of the upper portion of the heat storage material 7 shown in FIG. Therefore, the current flowing from the electrode 5 to the heat generating layer 30 flows through the entire heat generating layer 30.
[0023]
Below, the usage aspect of the exothermic hose 10 is demonstrated. First, power is supplied from the electrode 5 to the heat generating layer 30. Thereby, the heat generating layer 30 generates heat. The heat generated by the heat generation layer 30 propagates to the heat storage material 7 through the hose body 20 and the heat storage material 7 is heated. The heated heat storage material 7 gradually releases heat to the outside.
[0024]
The exothermic hose 10 is embedded in the ground such as a field or a road. The exothermic hose 10 embedded in the field has the effect of preventing cold damage by releasing heat into the soil and raising the soil temperature. In addition, if it is installed in paddy water, it raises the water temperature, thereby preventing cold damage and promoting crop growth. On the other hand, by embedding the heat generating hose 10 in a road or the like, it is possible to increase the road surface temperature and prevent snow melting and freezing of the road surface at low temperatures. Further, by installing the heat generating hose 10 on the roof, it is possible to remove snow during snowfall.
[Example 3]
[0025]
FIG. 3 shows a perspective view of the joint member 8 connected to the heat generating hose 1 according to one embodiment of the present invention. FIG. 3B shows a perspective view of the heat generating hose 1 and the joint member 8 in a connected state. The joint member 8 includes a joint main body 80, joint fitting portions 81 and 82, a joint hollow portion 83, and a joint electrode 84. The joint body 80 and the joint fitting portions 81 and 82 are made of the same material as the hose body 2 of the heat generating hose 1. The shape of the outer periphery of the vertical cross section of the joint body 80 is substantially the same as the shape of the outer periphery of the vertical cross section of the heat generating hose 1. On the other hand, the shape of the outer periphery of the longitudinal section of the joint fitting portions 81 and 82 is substantially the same as the shape of the inner periphery of the hollow portion 4 of the longitudinal section of the hose body 2 (see FIG. 1C). Accordingly, the joint fitting portions 81 and 82 are fitted into the hollow portion 4 at one end of the heat generating hose 1 (see FIG. 3B).
[0026]
Furthermore, a joint electrode 84 is provided at a position where the electrode 5 faces when the joint member 8 is fitted to the heat generating hose 1. The joint electrode 84 is provided so as to penetrate from the joint fitting portion 81 side end surface of the joint body 80 to the joint fitting portion 82 side end surface. 3B, the heat generating hose 1 on the joint fitting portion 81 side and the heat generating hose 1 on the joint fitting portion 82 side are electrically connected. Furthermore, the hollow portion 4 of the heat generating hose 1 on the joint fitting portion 81 side and the hollow portion 4 on the joint fitting portion 82 side communicate with each other through the joint hollow portion 83.
[0027]
The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.
[Industrial applicability]
[0028]
The heat generating hose of the present invention relates to suitably heating a member to be heated. For example, it is suitably used for snow melting and freezing prevention on road surfaces, railway tracks, parking lots, roofs, and the like.
[Brief description of the drawings]
[0029]
FIG. 1A is a perspective view of a heat generating hose 1 according to one embodiment of the present invention. 1B is a vertical cross-sectional perspective view taken along line aa in FIG. 1A. 1C is a vertical cross-sectional view taken along line bb of FIG. 1B.
FIG. 2 is a longitudinal sectional perspective view of a heat generating hose 10 according to another embodiment of the present invention.
FIG. 3A is a perspective view of a joint member 8 for connecting the heat generating hose 1 of the present invention, and FIG. 3B is a perspective view of the heat generating hose 1 and the joint member 8 in a connected state.

Claims (4)

A linear material that supplies power to the heat generating layer by using a material made of organic elastomer or natural rubber forming a flexible non-conductive hose body and a material of the heat generating layer in which a conductive material such as carbon black is kneaded with the organic elastomer. A heat generating hose obtained by extrusion molding of two colors using an electrode made of a conductive wire as an insert, wherein the heat generating layer is continuously embedded in the longitudinal direction in a state where a part of the hose body is cut out around the hollow portion. The heating hose is characterized in that the electrode is continuously embedded in the longitudinal direction in each of the end portions cut out of the part. The heat generating hose according to claim 1, wherein the hollow portion is filled with a heat storage material made of a polymer material such as gelled paraffin. The heat generating hose according to claim 1, wherein a side hole communicating with the hollow portion is provided in a portion where a part of the heat generating layer is notched. A non-conductive flexible hose body made of organic elastomer or natural rubber having a hollow portion, and a heat generating layer in which a conductive material such as carbon black is kneaded with the organic elastomer is formed around the hollow portion in the cross section of the hose body. An electrode made of a linear conductive wire that is continuously embedded in the longitudinal direction in a partly cut-out state and that supplies power to the heat generating layer is continuously connected in the longitudinal direction to each end part of the partly cutout. The material that forms the hose body and the kneaded material that forms the heat generation layer are inserted into a two-color extrusion molding machine using the linear conductive wire serving as an electrode as an insert. A method of manufacturing a heat generating hose characterized by extruding into a structure.

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