JP2017141658A - Device for melting asphalt for waterproofing work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for melting asphalt for waterproofing work, the device including a heat insulation tank in which, instead of melting a large amount of asphalt material input inside a melting tank by using electric heating or electromagnetic induction heating, a plate or sheet like asphalt material is inserted between two heated heating plates and is sequentially melted and made to flow down from both front and rear sides thereof at portions that abut to the heating plates, and a temperature range required for waterproofing work can be maintained.SOLUTION: A device for melting asphalt for waterproofing work comprises: a melting tank in which a plate or sheet like asphalt material is melted by inserting the asphalt material into a gap between heating plates formed of two metal plates or ceramic plates that are heated by a space heater or electromagnetic induction heater, or between heating plates formed of two electric resistance heating elements, the heating plates being arranged in a vertical or inclined manner and facing to each other with the gap therebetween; and a heat insulation tank which receives the molten asphalt melted in the melting tank and keeps it warm, and has a take out port for the molten asphalt at the bottom surface thereof and an insulation heater on the outer periphery thereof.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a melting apparatus for asphalt for waterproofing in construction and civil engineering work, and a plate or sheet solid asphalt material is placed between two metal plates arranged facing each other with a gap in the vertical direction. The present invention relates to an asphalt melting apparatus for waterproofing work that is narrowly inserted and melted by electric heating of the two metal plates or heating by electromagnetic dielectric heating.

Asphalt melting equipment used for waterproofing in construction and civil engineering works, an iron melting tank is heated with a kerosene or propane gas burner, and then crushed solid asphalt is charged and melted to a temperature suitable for construction. An apparatus called a melting pot has been generally used.
However, in a melting pot where such crushed solid asphalt is put into an iron melting tank and heated by a burner to melt, there is a risk that the flame of the burner will ignite the molten asphalt in the melting pot and cause a fire. In addition, since the iron melting pot is heated directly by a high-temperature burner, the durability of the melting pot is poor, and there may be holes in the melting pot, making the danger even higher. It was. Furthermore, there is a problem that it is not easy for the burner to control the temperature of the dissolved asphalt at a temperature suitable for construction.
Therefore, an invention relating to a melting apparatus that heats with an electric heater in consideration of safety and easy temperature control is disclosed in, for example, Patent Document 1 “Electricity of asphalt having an electric heater having a finned outer cylinder arranged at the bottom in a melting tank. Melting equipment
However, there is a limit to the electric capacity that can be used at the construction site, and it is actually not used because it takes a long time to dissolve solid asphalt and raise it to a temperature suitable for construction. is there.
In addition, the invention for melting asphalt by electromagnetic induction heating is also disclosed in Patent Document 2 as “(1) a cabinet made of an electromagnetic wave shielding material, equipped with wheels and capable of being manually pushed,
Microwave generation means for generating microwaves installed in the cabinet;
Irradiation means for irradiating the microwave emitted from the microwave generation means toward the road surface below the cabinet;
Electromagnetic shielding means provided on the outer periphery of the lower edge portion of the cabinet and the irradiation means, respectively,
The asphalt simple dissolution apparatus, wherein the electromagnetic wave shielding means is an electromagnetic wave shielding means comprising a plurality of shielding units, at least one of which is provided to be movable up and down.
(2) A simple asphalt melting apparatus according to claim 1, characterized in that a plurality of sets of microwave heating devices comprising the microwave generating means and the irradiation means are juxtaposed.
However, as can be seen in the scope of the utility model registration request (1) above, when the asphalt pavement is refurbished, the inside of the asphalt pavement is melted by electromagnetic induction heating to It is removed for repair work and welds cracks on the surface and cracks reaching the deep part, and it does not have a dissolution tank to dissolve asphalt, but emits microwaves toward the roadbed -Only the irradiation mechanism is mounted on the handcart.

The present inventor previously reduced the disadvantages of the conventional heavy oil burner type heating kettle, facilitated conveyance, easy to control the heating temperature, did not generate heated exhaust gas, and has a low odor and smoke. As a waterproof material melting apparatus, Patent Document 3 having [Claims] described below, that is, “[Claim 1] A cylinder placed on the pedestal 10 and provided with a heat insulating material 28 around the pedestal 10. And a melting tank section 20, electromagnetic induction heating means 40 is disposed around the outer periphery of the melting tank section 20, and heating fins 27 are disposed inside the melting tank section 20. Waterproof material melting device for waterproofing work.
[Claim 2] The waterproofing for building waterproofing work according to claim 1, wherein the dissolution tank section 20 is detachably mounted on the pedestal 10 and the bottom heater 13 is disposed on the pedestal 10. Material melting device.
[Claim 3] A tank opening 23 for introducing a waterproof material is formed in the upper part of the tank body 21 constituting the dissolution tank section 20, a tank opening / closing lid 26 for opening and closing the tank opening 23 is provided, and the tank opening and closing is provided. 3. The waterproof material melting apparatus for waterproofing a building according to claim 1 or 2, wherein an upper lid is attached to an upper portion of the lid. ]
The invention was made.
However, this invention is also described in paragraph [0019] of the specification as “asphalt production tank of petroleum refining manufacturer, asphalt heating tank of asphalt roofing manufacturer, and further from 160 to 200 ° C. from asphalt heating tank in each base area. The asphalt is packed in the asphalt melting apparatus of the present embodiment and transported to the waterproof construction site, where the heating unit is energized and heated, heated to 240-250 ° C. and used for waterproof construction. When the dissolved asphalt is insufficient, the tank opening / closing lid 26 is opened at the site, and the asphalt as the material is replenished from the tank opening 23 and dissolved.
As described in the above, not all the amount required for construction of dissolved asphalt is dissolved from the solid state at the construction site, and it is necessary to dissolve solid asphalt by electric heater or electromagnetic induction heating Time was not shortened, and it was a remaining issue.

Japanese Utility Model Publication No. 52-22455 Japanese Utility Model Publication No. 64-42310 JP 2000-336608 A

  The present invention has been made in view of the problems of the background art described above, and does not intend to dissolve a large amount of solid asphalt charged into a dissolution tank at once by electric heating or electromagnetic induction heating, but an electric heater or electromagnetic induction. A plate-like or sheet-like asphalt material is inserted into a gap between two metal plates heated to a high temperature by a heater, and then melted and flowed down sequentially from both the front and back surfaces in contact with the metal plate. It is an object of the present invention to provide an asphalt melting apparatus for waterproof work, which is provided with a heat insulating tank that can be kept warm within a temperature range required for waterproof work construction.

The present inventors have solved the above problems by the following means.
[1] Insert a sheet or sheet-shaped asphalt material for waterproofing work into the gap between two heat generating plates that are vertically or inclined and face each other with a gap, and between the two heat generating plates that generate the same heat. And an asphalt melting tank that is melted and melted in the gap between the two heating plates and receives and keeps the molten asphalt that flows down. Asphalt melting equipment for waterproof construction.

[2] The heat generating plate has a long protrusion with a width of 3 to 20 mm and a height of 3 to 10 mm having a semicircular or square cross section along the direction in which the asphalt dissolves and flows down on the surface thereof. The asphalt melting apparatus for waterproofing construction according to [1], which is provided at intervals.
[3] The asphalt melting for waterproofing work according to [1], wherein the heat generating plate is provided with a hemispherical or rectangular parallelepiped protrusion having a height of 3 to 10 mm and a bottom area of 1 to 3 cm on the surface thereof. apparatus.

[4] The heating plate is a metal plate made of any metal of iron, nickel, chromium, titanium, aluminum, copper, zinc, tin, or an alloy of these metals, and is arranged on the back surface of the metal plate. The asphalt melting apparatus for waterproof works according to any one of [1] to [3], wherein the apparatus is heated by a provided heat source.
[5] The heat generating plate is made of a ceramic plate made of any one of aluminum nitride, silicon carbide, zirconia, and alumina, and has a good thermal conductivity, and is heated by a heating source disposed on the back surface of the ceramic plate. The asphalt dissolving apparatus for waterproofing work according to any one of [1] to [3], wherein

[6] The asphalt melting apparatus for waterproof works according to [4] or [5], wherein the heating source is a space heater.
[7] The asphalt melting apparatus for waterproof works according to [4] or [5], wherein the heating source is an electromagnetic induction heater.
[8] The heating source according to any one of [4] or [7], wherein the heating source includes a temperature adjusting mechanism capable of adjusting a temperature of the heating plate in a range of 150 to 300 ° C. Asphalt melting equipment for waterproof work.

[9] The asphalt melting apparatus for waterproofing work according to [1], wherein the heating plate is an electric resistance heating element selected from silicon carbide, carbon, cermet, and nickel-chromium alloy.

[10] The gap between two heat generating plates that are vertically or inclined and face each other with a gap is narrow at the bottom and wide at the top [1] to [9] The asphalt melting apparatus for waterproofing construction according to any one of the above.
[11] The interval adjustment which can adjust the space | interval of the clearance gap lower end of the two heat generating plates arranged perpendicularly or inclined with a gap to 0.2 to 6 cm and the interval of the upper end in the range of 5 to 15 cm. The asphalt melting apparatus for waterproofing construction according to [10], comprising a mechanism.
[12] The waterproofing asphalt melting apparatus according to any one of [1] to [10], wherein the heating plate has a thickness of 5 to 30 mm.

[13] The heat-retaining tank is a container having a molten asphalt outlet on the bottom surface, and a heater for adjusting the temperature of the molten asphalt in the container on the outer periphery thereof. ] The asphalt melting apparatus for waterproofing works according to any one of the above.
[14] A liquid repellent coating such as a polytetrafluoroethylene resin (PTFE) coating or a fine diamond coating is formed on the inner surface of the heating plate or the inner surface of the heat insulating bath. [1] to [13] The asphalt melting apparatus for waterproofing construction according to any one of the above.
[15] The asphalt melting for waterproofing work according to [13], wherein the heater for adjusting the temperature of the molten asphalt is provided with a temperature maintaining temperature adjusting mechanism capable of adjusting the temperature in a range of 150 to 300 ° C. apparatus.

The following effects are exhibited by the asphalt melting apparatus for waterproofing work of the present invention.
<1> The asphalt melting apparatus for waterproofing work according to the present invention has a plate-like shape or a gap between two heat generating plates that are vertically or inclined and face each other with a gap therebetween, and two heat generating plates that generate the same heat. An asphalt melting tank that melts by inserting sheet-shaped asphalt material for waterproofing work, and a molten asphalt that is provided in the lower part of the melting tank and melts in the gap between the two heating plates to receive and retain heat. Because it consists of a molten asphalt heat insulation tank
The plate or sheet asphalt material is efficiently melted sequentially from the front and back surfaces that contact the two heat generating plates, and all the molten asphalt flows down to the heat insulation tank, so that two sheets of heat are generated when the equipment is stopped. Asphalt material solidified between the plates hardly remains, and even if it remains, it is easily dissolved by heating the heating plate, so that stable molten asphalt can be obtained at an early stage even when the apparatus is restarted, and the construction period can be shortened.

<2> The heating plate has a long projection with a width of 3 to 20 mm and a height of 3 to 10 mm having a semicircular or square cross section along the direction in which asphalt dissolves and flows down on the surface of the heating plate. Since it is provided at intervals, or provided with a hemispherical or rectangular parallelepiped protrusion having a height of 3 to 10 mm and a bottom area of 1 to 3 cm,
The asphalt melted in contact with the heat generating plate immediately flows down through the gap formed between the projections and is discharged to the asphalt heat insulation tank, so that the effect described in <1> can be further enhanced.

<3> The heating plate is a metal plate made of any metal of iron, nickel, chromium, titanium, aluminum, copper, zinc, tin, or an alloy of these metals, or aluminum nitride, silicon carbide, zirconia , Because it is a ceramic plate made of a good heat conductive ceramic of any one kind of alumina, and the heating source disposed on the back surface of the metal plate or ceramic plate is a space heater or an electromagnetic induction heater,
In addition to the effects described in the above <1> and <2>, the plate-shaped or sheet-shaped asphalt that is in contact with the heat generating plate is efficiently dissolved and flows down to the heat insulation tank, so that the space heater and the electromagnetic induction heater It consumes less power and can be used safely without consideration of the power capacity at the construction site and without fear of ignition of molten asphalt.

<4> Since the heating source includes a temperature adjustment mechanism that can adjust the temperature of the heating plate in a range of 150 to 300 ° C.,
In addition to the thickness and material of the asphalt material, it is possible to appropriately control the dissolution rate corresponding to environmental conditions such as air temperature.

<5> Since the heating plate is an electrical resistance heating element selected from silicon carbide, carbon, cermet, nickel-chromium alloy,
A heat source such as a space heater or an electromagnetic induction heater is not required, and the structure of the apparatus is simplified.

<6> The gap between two heating plates that are vertically or inclined and face each other with a gap therebetween is narrow at the bottom and wide at the top, and at the lower end of the gap between the two heating plates. Since the interval is 0.2 to 6 cm, and the interval adjustment mechanism capable of adjusting the upper end interval in the range of 5 to 15 cm is provided.
Not only can it handle asphalt materials with different thicknesses, but also the distance between the top edges of the heat generating plate can be reduced as the thickness decreases as it melts from both the front and back surfaces in contact with the heat generating plate. Asphalt material can be efficiently dissolved.
Moreover, since the thickness of the heat generating plate is 5 to 30 mm,
High heat conductivity, heat from the space heater and electromagnetic induction heater is efficiently transferred to the plate or sheet asphalt material through the heating plate, and the required amount of homogeneous molten asphalt is obtained in a shorter time. be able to.

The heat insulation tank is a container having a molten asphalt outlet on the bottom surface, and a heater for adjusting the temperature of the molten asphalt in the container is provided on the outer periphery thereof, and the temperature adjusting heater of the molten asphalt has a temperature of 150 to Since it has a heat insulation temperature adjustment mechanism that can be adjusted in the range of 300 ℃,
The molten asphalt flowing down from the melting tank and received in the container can be maintained at a temperature suitable for construction until construction work for waterproofing, and the molten asphalt received and accumulated in the heat retaining tank is taken out from the outlet. Can be taken out from time to time and used for waterproofing work.
Therefore, depending on the scale of waterproofing work, the melting capacity of asphalt material per unit time of the melting tank, and the demand capacity of molten asphalt in the thermal insulation tank, it is possible to realize a functional construction method that performs waterproofing work while melting asphalt material. It becomes possible.
Further, in the case where a liquid repellent coating such as a polytetrafluoroethylene resin (PTFE) coating or a fine diamond coating is formed on the inner surface of the heat generating plate or the inner surface of the heat insulating bath, the molten asphalt is difficult to adhere and the residual solid Asphalt can be reduced, and cleaning management is facilitated.

Cross-sectional view from the side of one embodiment of the asphalt melting apparatus for waterproofing work of the present invention Cross-sectional view from the front of one embodiment of the asphalt melting apparatus for waterproofing work of the present invention Cross-sectional view from the side of another embodiment of the asphalt melting apparatus for waterproofing work of the present invention Structural diagram of a heat generating plate provided with a long projection having a square cross section on the surface, (a) is a front view of a flat plate-shaped heat generating plate, (b) is a front view and a side view of the heat generating plate with the upper part bent. Structural diagram of a heat generating plate having a hemispherical protrusion on the surface, (a) is a front view of a flat plate-shaped heat generating plate, (b) is a front view and a side view of the heat generating plate with the upper part bent Structure diagram of space heater used as heating source Example of structure of planar coil of electromagnetic induction heater used as heating source Cross-sectional view showing the arrangement configuration of the heat generating plate of the asphalt melting apparatus for waterproofing construction shown in FIG.

EMBODIMENT OF THE INVENTION The form for implementing the asphalt melt | dissolution apparatus for waterproof construction of this invention is demonstrated based on the figure of an Example.
1 is a cross-sectional view from the side of one embodiment of the asphalt melting apparatus for waterproofing work of the present invention, FIG. 2 is a cross-sectional view from the front of one embodiment of the asphalt melting apparatus for waterproofing work of the present invention, FIG. FIG. 4 is a cross-sectional view from the side of another embodiment of the asphalt melting apparatus for waterproofing work according to the present invention, and FIG. 4 is a structural view of a heat generating plate provided with a long projection having a square cross section on the surface (a ) Is a front view of a flat heat generating plate, (b) is a front view and a side view of the heat generating plate with the upper part bent, and FIG. 5 is a structural diagram of the heat generating plate having a hemispherical protrusion on the surface. The front view of a flat heat generating plate, (b) is a front view and a side view of the heat generating plate with the upper part bent.
6 is a structural diagram of a space heater used as a heating source, FIG. 7 is a structural example of a planar coil of an electromagnetic induction heater used as a heating source, and FIG. 8 is a heating plate of the asphalt melting apparatus for waterproofing shown in FIG. It is a cross-sectional view which shows the arrangement configuration.
In the figure, 1 is an asphalt melting tank, 2 is a heating plate, 3 is a heating source, 3a is a space heater, 3b is an electromagnetic induction heater, 4 is a heat insulating material, 5 is an outer shell of the asphalt melting tank, 6 is a heat retaining tank, 7 is Container, 7a is a molten asphalt outlet, 8 is an electric heater for heat insulation, 9 is a metal pipe, 10 is an apparatus housing, 11 is a lid, 12 is a partition wall for placing a stirring tank, 13 is a caster, and 20 is a plate Or sheet-shaped asphalt material, 21 is molten asphalt, 31 is a heating element, 32 is a pressing plate, 33 is a power input terminal plate, 34 is a planar coil, and 35 is a square cross section provided on the surface of the heating plate 2 , 36 is a hemispherical protrusion provided on the surface of the heat generating plate 2, and T1 and T2 are temperature sensors for monitoring the temperature in the metal plate and the heat insulating tank, respectively.

As shown in FIGS. 1 and 2, the first embodiment of the asphalt melting apparatus for waterproof work according to the present invention has a bottomed rectangular tube-like casing 10 having a caster 13 at the bottom as a rectangular shape near the center of the inside. A partition wall 12 having a plurality of openings is integrally formed and partitioned vertically, and an asphalt dissolution tank 1 is installed on the upper part of the partition wall 12 and a molten asphalt 21 dissolved in the asphalt dissolution tank 1 is installed on the lower part. A heat-insulating tank 6 that holds at an appropriate temperature until the time is accommodated. On the upper front surface of the housing 10, the temperature control of the heat generating plate 2 of the asphalt dissolution tank 1 and the container 7 of the heat insulation tank 6 and the control for adjusting and adjusting the temperature of the heating source 3 and the electric heater 8 of the heat insulation tank accompanying it. A box (not shown) is provided, and the opening at the top of the housing 10 suppresses the spread of odors generated during asphalt dissolution to the surroundings, and prevents dust from being dissolved in the asphalt dissolution tank 1 when the apparatus is moved or not used. A lid 11 is provided.
The asphalt melting tank 1 in the asphalt melting apparatus for waterproofing construction of the present embodiment is composed of two heat generating plates 2 that are vertically or inclined and arranged to face each other with a gap therebetween, and a heating source 3 that heats the heat generating plate 2. A sheet-shaped or sheet-shaped waterproofing asphalt material 20 is melted in the gap between the two heat generating plates 2 heated by the heating source 3, and the heat generating plate 2 As shown in FIG. 2, it is sandwiched between the left and right wall surfaces of the outer shell 5 of the melting tank, and the heating source 3 is disposed in close contact with the back surface thereof (see FIG. 1). And the heat insulating material 4 is filled in the inner space of the outer shell 5 of the asphalt melting tank 1 generated behind the heating source 3 (see FIG. 1), and the heat energy generated by the heating source 3 is efficiently transmitted to the heating plate 2. It is comprised so that.
Further, as shown in FIG. 2, the asphalt dissolution tank 1 is inserted into a rectangular opening formed in a partition wall 12 provided near the inner center of the casing 10, as shown in FIG. An insertion portion 5a provided with an outflow hole 5c having a rectangular cross section for allowing the molten asphalt 21 melted in the asphalt dissolving tank 1 to flow down to the heat insulating tank 6 and a latching jaw portion 5b capable of being hooked on the partition wall 12 are formed. The asphalt dissolution tank 1 is detachably attached to the housing 10 so that the heat insulation tank 6 provided in the housing 10 can be cleaned and maintained.

A plate-like or sheet-like asphalt material 20 sandwiched between two heat generating plates 2 that are vertically or inclined in the asphalt dissolution tank 1 and that are opposed to each other with a gap and heated by a heating source 3 is as follows. Since the thickness is reduced by melting from the surface in contact with the heat generating plate 2, one or both of them are provided to be inclined so that the interval is narrowed downward, and the gap generated as the thickness decreases is reduced by the weight of the asphalt material 10. 1 is shown in a state in which both are inclined at the same angle in FIG. 1, but is not limited to this, and the two heating plates 2 facing each other are not limited to this. The lower end interval is narrow (for example, 0.2 to 6 cm), and can be adjusted within a certain interval width range (for example, 5 to 15 cm) corresponding to the thickness of the plate-like or sheet-like asphalt material 20 that inserts the upper end interval. In Kukoto also preferred. Further, the distance between the upper ends of the two heat generating plates 2 can be narrowed by a spring or the like, and the plate-like or sheet-like asphalt material 20 sandwiched between the heated heat generating plates 2 is pressed and brought into close contact. It is also preferable that
Further, along the direction in which the plate-like or sheet-like asphalt material 20 sandwiched on the surface of the heat generating plate 2 melts and flows down, as shown in FIG. 4, the cross-sectional shape is a semicircular or square width of 3 to 20 mm, Long protrusions 35 having a height of 3 to 10 mm are provided at intervals of 2 to 5 cm, and as shown in FIG. 5, protrusions 36 having a hemispherical shape or a rectangular parallelepiped shape having a height of 3 to 10 mm and a bottom area of 1 to 3 cm are provided. It is also preferable that the dissolved asphalt flow down quickly through the gap formed between the protrusions and be discharged to the asphalt heat insulation tank.
In FIG. 4, the cross section of the elongated protrusion 35 is shown as a square. However, the cross section is not limited thereto, and the cross section may be a semicircular shape having a shape that promotes the flow of the molten asphalt 21 such as a semi-elliptical shape.
5 shows the heat generating plate 2 provided with the hemispherical projection 36, the projection 36 is not limited to the hemispherical shape, but has a shape that promotes the flow of the molten asphalt 21 such as a rectangular parallelepiped or a hemispherical spherical shape. I just need it.

  As the heating source 3 for heating the heating plate 2, a space heater 3a or an electromagnetic induction heater 3b can be used, and any heating source 3 can be set to a temperature in the range of 150 to 300 ° C. A temperature adjustment mechanism for setting and controlling the amount of current supplied to the coil of the space heater 3a or the electromagnetic induction heater 3b is provided in a control box (not shown) so that the adjustment can be made. 2 and can be melted by setting the temperature and the temperature of the plate-like or sheet-like asphalt material 10 sandwiched between the two and the environmental conditions such as the temperature. This set temperature controls the amount of current supplied to the coil 31 of the space heater 3a or the electromagnetic induction heater 3b or the electric resistance heating element 34 according to temperature information fed back from the temperature sensor T1 attached to the heating plate 2. Maintained by doing.

On the other hand, the heat insulation tank 2 is composed of a container 7 having a bottom surface 7a of the molten asphalt 21 and a heat retaining electric heater 8 for retaining the molten asphalt 21 in the container 7 in the range of 150 to 300 ° C. I have. The space between the heat retaining electric heater 8 and the housing 10 is filled with a heat insulating material 4 to enhance the heat retaining effect and reduce the power consumption of the heat retaining electric heater 8.
The temperature setting of the molten asphalt 21 in the heat insulating tank 6 is set by a temperature adjusting mechanism provided in a control box (not shown), and temperature information fed back from a temperature sensor T2 attached to the heat insulating tank 6 is used. It is maintained by controlling the amount of current supplied to the electric heater 8 for heat insulation. Then, from the outlet 7a of the molten asphalt 21 provided on the bottom surface of the container 7 to the lower side surface of the casing 10, a metal pipe 9 and a valve (not shown) provided at the tip of the pipe 9 are provided. Thus, the molten asphalt 21 having a temperature suitable for waterproofing can be taken out.
In addition, it is also preferable that a plurality of fins are provided on the inner wall surface of the heat insulation tank to improve heat conduction and prevent the temperature of the molten asphalt from being lowered.

  The space heater 3a as the heating source 3 of the asphalt melting apparatus for waterproofing construction uses a heat-resistant mica plate for the insulating layer and the heating element 21 is arranged by meandering a high-temperature heat-resistant nickel chrome ribbon wire. As shown in FIG. 6, the heat generating plate 2 is tightly fixed by welding or screwing the pressing plate 32.

  The electromagnetic induction heater 3b as the heating source 3 of the asphalt melting apparatus for waterproofing work is one in which the magnetic lines of force from the coil 34 through which high-frequency current flows induces eddy currents in the heat generating plate 2 and heats them. 2 is provided with a planar coil 34 provided in the vicinity of 2 and an inverter for obtaining a high frequency of 20 kHz to 30 kHz from a commercial power source. The coil used in a normal IH cooker has a circular shape in accordance with the shape of the bottom of a metal pan, but in this asphalt melting apparatus, FIG. The use of a square coil as shown in FIG. Further, a plurality of coils as shown in FIG. 7B may be continuously connected, and the shape is not limited to the circular vortex shown in FIG. A plurality of rectangular coils shown in a) may be continuously connected.

Next, a second embodiment of the asphalt melting apparatus for waterproof work according to the present invention will be described with reference to FIGS. In addition, the present Example 2 is the same as the asphalt melting apparatus for waterproofing construction described in the first embodiment, in which the heating plate 2 that sandwiches and dissolves the plate-shaped or sheet-shaped asphalt material 20 in the asphalt melting tank 1 is illustrated in FIG. Since the structure is substantially the same as that of the first embodiment except that it is composed of two sheets having different shapes as shown in FIG.
As shown in FIG. 3, the asphalt dissolution tank 1 of the present embodiment is provided with two heating plates 2 that are opposed to each other with a gap therebetween, and the inclination angle at the inlet of the asphalt material 20. As shown in Fig. 8, α is 75 to 85 degrees, and the lower heating plate 2a is the flat plate shown in Fig. 6 (a). 6 (b) has a bent shape in the middle, and is configured such that the distance between the two heating plates 2a and 2b toward the discharged portion of the dissolved asphalt is narrowed.
With this configuration, the heating plate 2a has a wider contact surface with the plate-like or sheet-like asphalt material 20 than the heating plate 2 of Example 1, and the preheating time for the plate-like or sheet-like asphalt material 20 also increases. In addition, it contributes to shortening the dissolution time.
In addition, although the heat generating plates 2a and 2b in FIG. 8 are shown as being provided with long protrusions 35 having a square cross-sectional shape at intervals of 2 to 5 cm along the direction in which the molten asphalt flows down on the surface. Instead of this, use of the heating plates 2a and 2b having hemispherical protrusions on the surfaces shown in FIGS. 7A and 7B is not prevented.
Further, the cross-sectional shape of the long protrusion and the shape of the protrusion provided on the surface of the heat generating plate 2 are not limited to the square cross section and the hemispherical protrusion as in the first embodiment, but the semicircular cross section and the rectangular protrusion. Any shape that facilitates the flow of the molten asphalt 21 may be used.

A control box (not shown) for controlling the temperature of the heating plate 2 of the asphalt dissolution tank 1 and the container 7 of the heat retention tank 6 and the temperature setting and adjustment of the heating source 3 and the electric heater 8 of the heat retention tank are as described above. Due to the structure of the dissolution tank 1, there is no room for the upper part of the front surface of the housing 10, and it is provided on the lower front surface of the housing.
Further, as shown in FIG. 3, since the inlet of the plate-like or sheet-like asphalt material 20 is opened to the front of the housing 10, the lid 11 only needs to cover the front portion of the housing 10, Compared to the first embodiment, it is smaller and easier to handle.

  The asphalt melting apparatus for waterproofing work of the present invention is used in construction and civil engineering work, considering the ease of transportation and work to the work site, without the operator being bent over the overall height 700 to 800 mm so that a sheet-like or sheet-like asphalt material 20 can be introduced, and the width and depth are both 500 to 600 mm.

The plate-shaped asphalt material 20 was melted using the asphalt melting apparatus of Example 1 shown in FIGS. The used asphalt melting apparatus is such that the thickness of the two heat generating plates 2 arranged opposite to each other is 30 mm, and a sheathed heater is provided on the back surface, and a plate-like asphalt material is provided between the two heat generating plates 2. Was dissolved under the following conditions. The results are shown in Table 1.
1. 1. Heating plate material: iron and aluminum Spacing between heating plates of asphalt material inlet: 40 mm, 60 mm
3. Spacing between heating plates of asphalt discharge section: 3mm, 5mm
4). Heater capacity: 3.8-6.7kW
5. Heating plate set temperature: 220 ° C, 280 ° C, 290 ° C
6). Asphalt board thickness: 30mm, 50mm

  From the results shown in Table 1, it was found that molten asphalt for waterproofing work can be easily provided by using the apparatus of the present invention at the construction site.

1: Asphalt dissolution tank 2: Heating plate 3: Heating source 3a: Space heater 3b: Electromagnetic induction heater 4: Heat insulating material 5: Outer of asphalt dissolution tank 6: Insulation tank 7: Container 7a: Molten asphalt outlet 8: Insulation Electric heater 9: Metal pipe 10: Device casing 11: Lid 12: Partition wall 13: Caster 20: Plate or sheet asphalt material 21: Molten asphalt 31: Heating element 32: Press plate 33: Power input Terminal plate 34: Planar coil 35: Long protrusion with a square cross section provided on the surface of the heat generating plate 36 36: Hemispherical protrusion on the surface of the heat generating plate T1: Temperature sensor for monitoring the temperature of the heat generating plate T2 ： Temperature sensor that monitors the temperature inside the thermal insulation tank

Claims (15)

  Asphalt material for waterproofing work in the form of a plate or sheet in the gap between the two heat generating plates (2) that are vertically or inclined and arranged opposite each other with a gap between them and the two heat generating plates (2) that have generated heat (20) Asphalt dissolution tank (1) that sandwiches and melts, and molten asphalt that is provided below the dissolution tank (1) and melts and flows down in the gap between the two heating plates (2) ( 21) An asphalt melting apparatus for waterproofing construction, comprising a molten asphalt thermal insulation tank (6) that receives and retains heat.   The heat generating plate (2) has a long protrusion (35) having a semicircular or square cross-sectional shape with a width of 3 to 20 mm and a height of 3 to 10 mm along the direction in which the asphalt dissolves and flows down on the surface. The asphalt melting apparatus for waterproofing work according to claim 1, wherein the asphalt melting apparatus is provided at intervals of 2 to 5 cm.   The waterproof construction according to claim 1, wherein the heat generating plate (2) is provided with a hemispherical or rectangular parallelepiped protrusion (36) having a height of 3 to 10 mm and a bottom area of 1 to 3 cm on a surface thereof. Asphalt melting equipment.   The heating plate (2) is a metal plate made of any one of iron, nickel, chromium, titanium, aluminum, copper, zinc, tin, or an alloy of these metals, and is disposed on the back of the metal plate. The asphalt melting apparatus for waterproofing work according to any one of claims 1 to 3, wherein the apparatus is heated by a heat source (3) provided.   The heat generating plate (2) is made of a ceramic plate made of one of good thermal conductive ceramics of aluminum nitride, silicon carbide, zirconia, or alumina, and a heating source (3 The asphalt melting apparatus for waterproofing work according to any one of claims 1 to 3, wherein the asphalt melting apparatus is waterproof.   The asphalt melting apparatus for waterproofing work according to claim 4 or 5, wherein the heating source (3) is a space heater (3a).   The asphalt melting apparatus for waterproofing work according to claim 4 or 5, wherein the heating source (3) is an electromagnetic induction heater (3b).   The said heating source (3) is equipped with the temperature adjustment mechanism which can adjust the temperature of the said heat generating plate (2) in the range of 150-300 degreeC, The any one of Claims 4-7 characterized by the above-mentioned. Asphalt melting equipment for waterproof construction.   The asphalt melting apparatus for waterproofing work according to claim 1, wherein the heat generating plate (2) is an electric resistance heating element selected from silicon carbide, carbon, cermet, and nickel-chromium alloy.   The gap between two heat generating plates (2) that are vertically or inclined and face each other with a gap therebetween is narrow at the bottom and wide at the top. The asphalt melting apparatus for waterproofing construction according to claim 1.   The distance adjustment which can adjust the space | interval of the clearance gap lower end of the 2 heat_generation | fever plates (2) arrange | positioned facing the said perpendicular | vertical or inclination and the clearance gap to 0.2-6 cm, and the space | interval of an upper end within the range of 5-15 cm. The asphalt melting apparatus for waterproofing work according to claim 10, further comprising a mechanism.   The asphalt melting apparatus for waterproofing work according to any one of claims 1 to 11, wherein the heating plate (2) has a thickness of 5 to 30 mm.   The heat insulation tank (6) is a container (7) having a bottom surface (7a) for the molten asphalt (11), and a heater for adjusting the temperature of the molten asphalt (11) in the container (7) on the outer periphery. The asphalt dissolving apparatus for waterproofing work according to any one of claims 1 to 12, wherein (8) is provided.   The liquid repellent film such as a polytetrafluoroethylene resin (PTFE) film or a fine diamond film is formed on the inner surface of the heat generating plate (2) or the inner surface of the heat insulating tank (6). 14. The asphalt dissolving apparatus for waterproofing work according to any one of 13 above. The waterproof construction according to claim 13, wherein the heater (8) for adjusting the temperature of the molten asphalt (11) includes a temperature maintaining temperature adjusting mechanism capable of adjusting the temperature within a range of 150 to 300 ° C. Asphalt melting equipment.

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