KR20110102212A - Heating device for pipe - Google Patents

Abstract

[Problem] A heating apparatus using electric energy for heating a fluid flowing in a pipe having an accessory having a diameter larger than the pipe's diameter, such as a joint, a connection part of a branch pipe, and a connection part of a pipe, from the outer peripheral side of the pipe, It can be arrange | positioned easily to piping and accessories, and can provide a heating apparatus which can heat piping uniformly and efficiently, and is inexpensive at the time of installation.
[Solution] A surface heater and a surface of a surface heater facing the center side of the thermal insulation material covered by a metal layer in a heat insulating material having a tubular shape capable of enclosing an accessory and a pipe in a predetermined section. It is set as the heating apparatus of the piping which extends toward a center part from the surface, and is equipped with the metal heat transfer member arrange | positioned so that the piping may be clamped and contacted.

Description

Heating device for piping {HEATING DEVICE FOR PIPE}

The present invention mainly relates to a heating apparatus using electric energy for heating a fluid flowing in a cylindrical pipe. More specifically, the present invention relates to a heating apparatus for efficiently heating a fluid flowing in a pipe having accessories such as a seam and a valve.

DESCRIPTION OF RELATED ART Conventionally, the planar heater for attaching to the outer surface of various piping etc. and heating the fluid which distribute | circulates in piping is used widely. As a form of such a heater, for example, as shown in Japanese Patent Laid-Open No. 11-74066 and Japanese Patent Laid-Open No. 2004-158271, a tape-shaped heater wound around a pipe in a spiral shape, Japan As shown in JP-A-2000-505582, JP-A-2002-295783 and JP-A-2002-352941, a jacket heater and the like in which a heat generating element and a heat insulating material are integrated have been developed.

In addition, as a heat generating element used for the above-described planar heater, a synthetic resin (conductive resin) containing graft carbon, carbon powder, metal powder or metal oxide powder or the like is used for glass cloth. It is impregnated, the above-mentioned conductive resin is applied to or printed on an insulating substrate sheet such as polyester, polyimide or mica, or the like is used, the metal foil is etched into a circuit, or the metal resistance wire is an insulating substrate sheet. The thing which enclosed in and made into a circuit is mentioned.

[Patent Document 1] Japanese Patent Application Laid-Open No. 11-74066 [Patent Document 2] Japanese Unexamined Patent Publication No. 2000-505582 [Patent Document 3] Japanese Patent Application Laid-Open No. 2002-295783 [Patent Document 4] Japanese Patent Application Laid-Open No. 2002-352941 [Patent Document 5] Japanese Patent Application Laid-Open No. 2004-158271

However, when the pipe to be heated is equipped with accessories having a diameter larger than the pipe diameter, such as a joint, a branch pipe connection part, a valve connection part, and the like, a conventional tape-shaped heater or a jacket heater can be used. There was a problem. For example, when a tape-shaped heater is used, there is a problem that it is troublesome to wind it around these pipes and fittings, and that it is difficult to mount so that the temperature distribution becomes uniform. In addition, when a pipe and an accessory are to be heated together using a large jacket heater, there is a gap between the heater and the pipe at a location where no accessory is used. Therefore, it is not possible to uniformly heat the entire pipe. There was a problem that is delayed. In addition, when heating the piping and the accessories separately, it is necessary to prepare a heater of a plurality of complicated shapes, there is a problem in that the cost of the purchase of such a heater is expensive, and the mounting of such a heater is troublesome.

Accordingly, a problem to be solved by the present invention is a heating apparatus using electrical energy for heating a fluid flowing through the inside of a pipe having accessories such as a seam, a connecting part of a branch pipe, and a connecting part of a valve from the outer peripheral side of the pipe. And a heating apparatus which can be easily disposed in an accessory, can uniformly and efficiently heat pipes, and is inexpensive at the time of installation.

MEANS TO SOLVE THE PROBLEM As a result of earnestly examining in order to solve these subjects, the center of a heat insulating material is the surface heater coat | covered by the metal layer inside the comparatively large heat insulating material which can surround the accessories and piping of a predetermined | prescribed section. If the surface of the surface heater facing to the side is arrange | positioned so that it may become a metal layer, and the metal heat transfer member which extends toward the center part of a heat insulating material from the surface of this metal layer so that a pipe may be clamped and contacted is fixed to this metal layer, The heat from the heater was found to be easily and efficiently transmitted to the pipe through the metal layer and the metal heat transfer member, and the heating device of the pipe of the present invention was reached.

That is, the present inventors are a heating device for heating a pipe having an accessory having a diameter larger than the diameter of the pipe to be heated, and the inside of the heat insulating material having a tubular shape capable of enclosing the accessory and the pipe in a predetermined section. And a planar heater whose surface facing the center side of the heat insulating material is covered by a metal layer and a metal heat transfer member which extends from the surface of the metal layer toward the center of the heat insulating material, and is arranged so as to sandwich and support the pipe. It is made with the heating value of the piping characterized by the above-mentioned.

Since the heating device of the pipe of the present invention can be heated together with the pipe, an accessory having a diameter larger than the diameter of the pipe to be heated in one heating device, it is not troublesome to attach the heating device to the pipe. The cost of installation is also inexpensive. Moreover, since the heating apparatus arrange | positions a metal layer and the metal heat-transfer member which contact | connects a piping on the surface of a planar heater, the heat from a planar heater is easily transmitted to piping through these members, and a heating apparatus makes piping piping uniformly. It can heat efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the upper cutaway which shows an example of the heating apparatus of the piping of this invention.
2 is a cross-sectional view showing an example of a heating device for a pipe of the present invention.
3 is a perspective view showing an example of a part (without electrode insertion portion) of a heat insulating material used in the present invention.
4 is a perspective view showing an example of the configuration of a planar heater, a metal layer, and a metal heat transfer member used in the present invention.
5 is a perspective view showing an example of a part (with electrode insertion portion) of a heat insulating material used in the present invention.
FIG. 6 is a cross-sectional view showing an example of the configuration of a planar heater, a metal layer, and a metal heat transfer member other than FIG. 4 used in the present invention. FIG.
FIG. 7 is a cross-sectional view showing an example other than FIG. 2 of a heating device for a pipe of the present invention. FIG.
8 is a block diagram of a pipe provided with a joint.
9 is a configuration diagram of a pipe provided with a connecting portion of a valve (branch pipe).

The heating apparatus of a pipe of the present invention is a heating apparatus using electric energy for heating a fluid flowing through a pipe having an accessory having a diameter larger than the diameter of a pipe to be heated, such as a joint, a connecting portion of a branch pipe, and a connecting portion of a valve. Apply.

Hereinafter, although the heating apparatus of the piping of this invention is demonstrated based on FIGS. 1-9, this invention is not limited by this.

1 is a perspective view of an upper cutaway showing an example of a heating device for a pipe of the present invention. 2 is a cross-sectional view showing an example of a heating device for a pipe of the present invention. 3 is a perspective view showing an example of a part (no electrode insertion portion) of the heat insulating material used in the present invention. 4 is a perspective view showing an example of the configuration of a planar heater, a metal layer, and a metal heat transfer member used in the present invention. 5 is a perspective view showing an example of a part (with electrode insertion portion) of the heat insulating material used in the present invention. FIG. 6 is a cross-sectional view showing an example of the configuration of a planar heater, a metal layer, and a metal heat transfer member other than FIG. 4 used in the present invention. FIG. FIG. 7 is a cross-sectional view of an heating device of the pipe of the present invention other than FIG. 2. It is a block diagram of the piping provided with a joint. It is a block diagram of the piping provided with the connection part of a valve (branch pipe).

The heating apparatus of the pipe of the present invention uses an accessory having a diameter larger than the diameter of the pipe to be heated, for example, a joint 9 of FIG. 8 and a connection portion 10 of the valve (paper tube) 11 of FIG. 9. It is a heating apparatus for heating the provided piping 8. As shown in FIG. 1, FIG. 2, the heating apparatus of the piping of this invention has the center of the heat insulating material 1 in the inside of the heat insulating material 1 which has this tubular shape which can surround this accessory of this predetermined section, and this pipe. The surface facing the side is fixed to the surface heater 3 covered by the metal layer 2 and the surface of the metal layer 2, and extends toward the center of the heat insulating material 1, so that the pipes are sandwiched in contact with each other. It is a heating apparatus of piping provided with the metallic heat exchanger member 4 arrange | positioned.

In addition, Figure 1 is a perspective view of the upper cut off the portion of the heat insulating material having the electrode insertion portion 7 of Figure 5 in the heating device of the pipe of the present invention. The heating apparatus of the piping of this invention arrange | positions one structural part of the heating apparatus which inserted the electrode in the mounting part 7 of the electrode of the heat insulating material of FIG. 5 above the one structural part of the heating apparatus shown in FIG. to be.

The heat insulating material in the heating apparatus of this invention is a heat insulating material which has a cylindrical shape (cylinder, elliptical cylinder, square cylinder, polygonal cylinder) of larger inner diameter than an accessory. The cylindrical heat insulating material can also be made into the disk shape etc. which have the hole of the grade which can pass through piping for both ends of a heat insulating material in order to improve heat insulation. As for the cylindrical heat insulating material, the shape of the outer periphery and the shape of the inner periphery of the cross section of a longitudinal direction and a perpendicular | vertical may correspond as shown in FIG. 7, and does not need to match as shown in FIG. Although the heat insulating material in the heating apparatus of this invention can also be made into the heat insulating material which consists of one molded object which has a cylindrical shape, as shown to FIG. 3, FIG. 5, it is made into 2 divisions, 3 divisions, or 4 divisions in a longitudinal direction, and these are banded. It may be integrated by combining with each other by a coupling means such as.

The constituent material of the heat insulating material according to the present invention is not particularly limited as long as it can withstand the heating temperature of the heater and has heat insulating properties. For example, silicone resin, Teflon (registered trademark) resin, polyolefin (po1yo1efin) resin, polyester resin And vinyl chloride resins, polyimide resins, and the like. As a constituent material of the heat insulating material in this invention, silicone resin is preferable in these. Moreover, the thickness of a heat insulating material is 1 mm-50 mm normally, Preferably they are 2 mm-20 mm. If the thickness of the heat insulator is less than 1 mm, the heat insulation is deteriorated. If the thickness is more than 50 mm, the effect of improving the heat insulation is reduced, resulting in a problem that the heating device becomes large.

The planar heater used in the present invention is usually a planar heater in which both surfaces of the heat generating element are coated with an insulating resin sheet. The planar heater used for this invention may or may not have flexibility and flexibility.

As the heat generating element, for example, a metal foil resistor, a metal wire resistor or a graft carbon, a carbon powder, a metal powder or a metal oxide powder molded into a desired pattern is kneaded with a heat resistant resin such as a silicone resin. The resistor etc. which impregnated electroconductive resin into base materials, such as glass fiber and ceramic fiber, can be used. The thickness of such a heat generating element is usually 0.01 mm to 0.5 mm, preferably 0.05 mm to 0.1 mm. If the thickness of the heat generating element is less than 0.01 mm, the strength of the heat generating element is weak, and if it exceeds 0.5 mm, the flexibility and flexibility of the heat generating element may be lost.

The insulating resin sheet is not particularly limited as long as it is electrically insulating at a predetermined thickness. Examples of the insulating resin sheet include silicone resins, Teflon (registered trademark) resins, polyolefin resins, polyester resins, vinyl chloride resins, polyimide resins, and the like. As the insulating resin sheet, a silicone resin is preferred among these. The thickness of the insulating resin sheet is usually 0.5 mm to 10 mm, preferably 1 mm to 5 mm. If the thickness of the insulating resin sheet is less than 0.5 mm, the electrical insulation deteriorates, and if the thickness exceeds 10 mm, the flexibility may be lost.

In the heating apparatus of this invention, a metal layer is coat | covered at the center side surface of the planar heater as mentioned above. As a metal layer, the metal foil or metal plate of thickness 0.01mm-3mm normally, Preferably the metal foil or metal plate of 0.05mm-2mm thickness is used. As a material of a metal, iron, steel, aluminum, an alloy, etc. can be illustrated. The metal layer can apply a far-infrared paint to the surface of the metal layer facing the center side of a heat insulating material, and can improve the heating efficiency to piping by radiation of far-infrared rays, and can improve temperature uniformity.

In the heating apparatus of this invention, the metal heat transfer member is further arrange | positioned at the surface of the metal layer of the center side of the heat insulating material mentioned above. As a form of a metal heat-transfer member, as shown to FIG.2, FIG.6 (2), (4), it consists of the base part 6 which consists of one or two metal columns, and two metal plates of the shape which mutually expanded. A metal heat transfer member having a tip portion 5, as shown in Fig. 6 (1), consisting of two semi-circular metal plates facing each other with a portion 6 of a base made of one or two metal columns. A metal heat transfer member having a tip portion 5, as shown in FIG. 6 (3), a plurality of metal heat transfer members and the like set so that the pipe can be held by the tip portion (convex portion). have. In addition, a metal heat transfer member may be formed by punching a portion of the metal layer and subjecting it to bending.

Iron, copper, aluminum, an alloy, etc. can be illustrated as a constituent material of a metal heat transfer member. As a constituent material of the metal heat-transfer member, it is preferable that at least the portion 5 at the tip has elasticity in order to widen the range of the diameter of the pipe that can be held. Such a metal heat transfer member is arranged so that the portion 5 at the tip contacts the pipe 8 at the portion where the accessory is not provided.

In the present invention, the planar heater, the metal layer, and the metal heat transfer member are arranged in the heat insulating material, for example, after the constituent material shown in FIG. 4 is placed in the heat insulating material shown in FIG. 3 and assembled into the structure shown in FIG. What is necessary is just to arrange | position and integrate the heat insulating material of the structure shown in 5.

In addition, when the planar heater is placed on the entire surface of the inner wall surface of the heat insulating material, the heating efficiency of the planar heater to the pipe is improved, but the installation of the pipe and the accessories may make it difficult to install the pipe. For example, as shown in FIG. 6, it can arrange | position to a part (cross section is "co" shape) of the inner wall surface of a heat insulating material. Moreover, the metal layer can also be coat | covered on the whole surface or one part of the surface of the planar heater facing the center side of a heat insulating material similarly. As a form of a surface heater and a metal layer, plate shape, a cylindrical shape, a square cylinder shape, the cylindrical shape which has a slit in the longitudinal direction, a square cylinder shape, etc. can be illustrated. The heat insulating material, the planar heater, the metal layer, and the metal heat transfer member are usually fixed to each other so as not to move easily.

Next, although an Example demonstrates this invention concretely, this invention is not limited by these.

[Example]

Example 1

(Manufacture of Heater Components)

The metal resistance wire is arrange | positioned on the uncured silicone resin insulating sheet of length 3,5 cm, width 30.0 cm, and thickness 0.8mm, and the same silicone resin insulating sheet is piled on it, and 180 degreeC After heat-pressing on the conditions for 30 minutes, it was left to stand in a 200 degreeC furnace for 2 hours, and it fully hardened and produced three surface heaters which have flexibility. Next, a cross section consisting of three metal plates having a length of 3.5 cm, a width of 30.0 cm, and a thickness of 2.0 mm coated with these far-infrared coatings is a 'co' shaped metal layer (section: 3.5 cm × 3.5 cm, length: 30.0 cm). It integrated and shape | molded by adhesion to the outer surface of the side). A heater constituting member having a configuration shown in Fig. 4 is provided with a metal heat transfer member having a portion of a base composed of two metal pillars and a tip portion composed of two metal plates having a shape widened to each other at two predetermined positions of the metal sheet. Got it.

(Production of heating device for piping)

The outer shape of the cross section is wound around the square tube stainless steel pipe having the same size as the above-mentioned 'co' heater element, in the order of silicone resin insulation sheet, silicone sponge sheet, and silicone resin insulation sheet. After standing in a furnace at 2 ° C. for 2 hours to completely cure, the stainless steel pipe was removed and molded into a square tube having a thickness of 12.0 mm to obtain a heat insulating member. Moreover, it divided in half in the longitudinal direction, provided the cavity part for attaching an electrode to one side, and inserted the electrode. The heat insulating member and the above-mentioned 'co' shaped heater constituents were combined to obtain a rectangular tube heating device having a rectangular cross section in Fig. 2.

(Heating test)

The heating apparatus obtained as mentioned above was attached to the piping provided with the connection part and the joint of the valve shown in FIG. 9 so that a metal heat-transfer member might contact the piping between the connection part of a valve, and a joint. At that time, it was easy to attach the heating apparatus without any trouble. Next, the rated voltage of 100 V was applied to the heating device (target: 150 ° C.), and the surface temperature of the connection portion of the valve after 1 hour was measured. As a result, the surface temperature of the connection part of the valve part reached 150 degreeC.

[Example 2]

In the production of the heater constitution member of Example 1, a heater constitution member was produced in the same manner as in Example 1, except that the metal heat transfer member was replaced with the metal heat transfer member shown in Fig. 6 (1). In the same manner as in Example 1, a heat insulating member was mounted, a piping heating device was fabricated, and the heating test was performed in the same manner as in Example 1 with a rated voltage of 100 V applied to the heating device. The surface temperature of the connection part reached 150 degreeC.

Example 3

In the production of the heater constitution member of Example 1, the heater constitution member was produced in the same manner as in Example 1 except that the metal heat transfer member was changed to the metal heat transfer member shown in Fig. 6 (3). In the same manner as in Example 1, a heat insulating member was mounted, a piping heating device was fabricated, and the heating test was performed in the same manner as in Example 1 with a rated voltage of 100 V applied to the heating device. The surface temperature of the connection part reached 150 degreeC.

[Comparative Example]

The heater constitution member was produced in the same manner as in Example 1 except that the metal heat-transfer member was not mounted in the fabrication of the heater constitution member of Example 1. In the same manner as in Example 1, a heat insulating member was mounted, a piping heating device was fabricated, and the heating test was performed in the same manner as in Example 1 with a rated voltage of 100 V applied to the heating device. It heated up only to the surface temperature of 105 degreeC of the connection part, and reached | attained the target 150 degreeC.

As in the above embodiment, it is confirmed that the heating device of the pipe of the present invention is not troublesome to install, and heat from the planar heater is easily transmitted to the pipe through the metal heat transfer member, so that the pipe can be uniformly and efficiently heated. there was.

1 insulation 2 metal layer
3-sided heater 4 Metal heating element
5 Part of tip of metal heat-transfer member
6 Parts of origin of metal heat-transfer members
7 Electrode insert 8 Piping
9 seams 10 connections
11 valve

Claims (10)

A heating apparatus for heating a pipe having an accessory having a diameter larger than the diameter of a pipe to be heated, wherein the accessory is provided in a predetermined section and inside a heat insulating material having a tubular shape capable of enclosing the pipe. The surface heater facing the center side of the said heat insulating material is provided with the surface heater covered by the metal layer, and the metal heat-transfer member piped so that it may extend toward the center part of the said heat insulating material, and piped so that a contact may be made by contacting piping. Heating device for piping. The method according to claim 1,
A heating device for piping, in which the accessory is a joint, a branch pipe connection part, or a valve connection part. The method according to claim 1,
Heating device of the pipe is coated with far-infrared paint on the surface of the metal layer. The method according to claim 1,
The heating device of a pipe in which the said metal heat transfer member has the part of the base which consists of one or two metal columns, and the part of the tip which consists of two metal plates of the shape which spread | separated from each other. The method according to claim 1,
The heating apparatus of the piping which has the said metal heat transfer member which consists of the part of the base which consists of one or two metal columns, and the part of the tip which consists of two metal plates of the semicircle facing each other. The method according to claim 1,
And a plurality of said metal heat transfer members are arranged so that the metal heat transfer members can hold a pipe. The method according to claim 1,
And the metal heat transfer member is formed by performing at least one of a punching process and a bending process on a part of the metal layer. The method according to claim 1,
A heating device for a pipe in which the metal heat transfer member is fixed to the metal layer by any one of welding, piece nut, and adhesive. The method according to claim 1,
The surface heater is a heating device of the pipe having a heating element which is a metal foil resistor or a metal wire resistor. The method according to claim 1,
The planar heater is a heating device of a pipe provided with a heating element which is a resistor in which at least one selected from graft carbon, carbon powder, metal powder, and metal oxide powder is kneaded with a heat resistant resin.

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