JP2008285852A - Heating device of emulsion tank in asphalt emulsion spraying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating device of an emulsion tank in an asphalt emulsion spraying device capable of preventing an asphalt emulsion from being deteriorated and providing good flowability to the emulsion by uniformly and efficiently heating the emulsion in an emulsion tank mounted on an asphalt emulsion spraying vehicle. <P>SOLUTION: A jacket 2 in which a hot water chamber 3 is formed is attached to the lower outer peripheral surface of the emulsion tank 1. A hot water heated to a specified temperature is introduced into the hot water chamber 3 from the one end by a heating means. With the inside of the hot water tank 3 filled with the hot water, the hot water is forced to flow and guided from the other end of the hot water chamber 3 to the outside and re-guided into the hot water chamber 3. Also, the hot water chamber 3 is partitioned into a plurality of compartments 3a-3f by partition plates 4a-4e, and the hot water is forced to so flow to the other end as to bypass in the vertical direction through the partition plates for uniformly heating the emulsion tank 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heating device for maintaining a constant temperature in an emulsion tank in an asphalt emulsion spraying device mounted on an asphalt emulsion spraying vehicle and paving by spraying asphalt emulsion on a road surface. It is.

  The asphalt emulsion spraying device installed in the asphalt emulsion spraying vehicle is a pipe that allows the asphalt emulsion in the emulsion tank installed on the spraying vehicle to be pumped by the pump or by the pressurization in the emulsion tank by the high-pressure air from the compressor. Supply to the spray pipes arranged in the width direction of the car body at the lower rear end of the car body, and open the open / close cocks attached to the spray pipes at equal intervals in the length direction. Asphalt emulsion is sprayed onto the road surface from a plurality of spray nozzles connected and communicated with each other in the pipe.

  In such an asphalt emulsion spraying device, the emulsion in the emulsion tank needs to be given fluidity by heating. Therefore, conventionally, there has been a method in which a flue is provided in the emulsion tank and heated with an oil burner or the like. Although employed, such a heating means may cause the emulsion in the tank to be altered due to local heating by the high-temperature flue and cannot be used. In particular, recent asphalt emulsions have complicated components due to demands for functional improvements such as quick-drying, and the above heating means prevents such asphalt emulsions from being altered and imparts good fluidity. It was difficult to perform temperature control.

For this reason, for example, as described in Patent Document 1, a jacket is attached to the outer peripheral surface of the emulsion tank to form a space between the opposing surfaces of the emulsion tank and the jacket in the hot oil reservoir. A heating means such as an electric heater is mounted on the outer bottom surface of the jacket, the hot oil in the hot oil reservoir is heated by the heating means, and the emulsion is heated in the emulsion tank by the heated hot oil, Furthermore, the hot oil reservoir and the emulsion spray pipe are connected by a hot oil circulation pipe, and the hot oil is supplied to the emulsion spray pipe to heat the spray pipe to a certain temperature and maintain the fluidity of the asphalt emulsion. On the other hand, an emulsion tank heating apparatus configured to spray from a spray nozzle has been developed.
JP 2004-100145 A

  However, according to such an emulsion tank heating apparatus, since the heating means such as an electric heater is mounted on the outer bottom surface of the jacket, the hot oil is stored in the jacket provided to surround the outer peripheral surface of the emulsion tank. As the bottom of the part is heated intensively, it is difficult not only to uniformly heat the emulsion in the emulsion tank, but also the heat efficiency for transferring heat to the emulsion tank is poor, and it can be heated to a predetermined temperature. There is a problem that the capacity of the emulsion tank is limited.

  Furthermore, heating by electric heating not only takes too much time to raise the temperature of the emulsion, but since the electric heating medium is oil, there is a risk of fire occurring during heating, etc. There has been a problem that if the hot oil circulation pipe connecting the hot oil reservoir and the external emulsion spray pipe is unexpectedly damaged and the hot oil leaks, pollution occurs.

  The present invention has been made in view of such problems. The object of the present invention is to uniformly and efficiently heat the entire emulsion tank with a simple structure and to eliminate the occurrence of fire and pollution. The present invention provides an apparatus for heating an emulsion tank in an asphalt emulsion spraying apparatus.

  In order to achieve the above object, the emulsion tank heating device in the asphalt emulsion spraying device according to the present invention, as described in claim 1, is an asphalt emulsion tank mounted on an asphalt emulsion spraying vehicle, and is fed from the asphalt emulsion tank to the emulsion spraying tube through the emulsion feeding pipe. A heating device for the above-mentioned emulsion tank in an asphalt emulsion spraying device configured to feed asphalt emulsion and spray the asphalt emulsion from a plurality of spray nozzles provided in the emulsion spraying pipe, and is provided on the outer peripheral surface of the emulsion tank. Are installed in the warm water chamber, and an inlet is provided at one end of the warm water chamber in the length direction of the emulsion tank, and a hot water outlet is provided at the other end. The hot water inlets are connected by a hot water circulation line equipped with a hot water pump and heating means arranged outside the emulsion tank. Further, the hot water chamber is partitioned into a plurality of partition chambers by a plurality of partition plates arranged at predetermined intervals in the length direction of the emulsion tank, and from the partition plate on one end side toward the partition plate on the other end side. The hot water outlet port is formed by alternately providing the upper flow port and the lower flow port and flowing the hot water introduced from the hot water introduction port into the compartment on one end side so as to bypass each compartment sequentially in the vertical direction through the flow port. It is configured to be derived from

  In the heating apparatus for the emulsion tank in the asphalt emulsion spraying apparatus configured as described above, the invention according to claim 2 is that the emulsion tank is formed in a cylindrical shape and is in contact with the lower peripheral portion of the outer peripheral surface thereof, and the inside is a half cross-section. It is fitted with a semicircular curved jacket formed in an annular hot water chamber, and the outer peripheral surface of the emulsion tank including the outer peripheral surface of the jacket is covered with a heat insulating layer having a constant thickness. Features. The invention according to claim 3 is characterized in that a part of the hot water circulation pipe is disposed in a state of penetrating the emulsion spray pipe.

  According to the heating apparatus for the emulsion tank in the asphalt emulsion spraying apparatus according to claim 1, the inside of the jacket mounted on the outer peripheral surface of the emulsion tank is formed in the warm water chamber, and the outside of the emulsion tank is piped to the warm water chamber. The hot water heated by the heating means provided in the hot water circulation pipe is introduced from one end introduction port to flow while being filled in the hot water chamber, and the other end outlet is led to the hot water circulation pipe. Since the hot water heating means is arranged in the hot water circulation pipe outside the emulsion tank, fuel with good combustion efficiency, such as LPG gas or light oil, is used for a predetermined temperature efficiently in a short time. It can be fed into the hot water chamber while being heated.

  Further, the hot water chamber is partitioned into a plurality of partition chambers by a plurality of partition plates arranged at predetermined intervals in the length direction of the emulsion tank, and the upper side from the partition plate on one end side toward the partition plate on the other end side. From the hot water outlet, the hot water introduced into the compartment on the one end side from the hot water inlet is made to flow alternately so as to bypass each compartment in the vertical direction sequentially through the hot water inlet. Therefore, it is possible to flow hot water at a constant temperature throughout the hot water chamber, and therefore heat is evenly transferred to the emulsion tank covered with the jacket having the hot water chamber. The emulsion in the tank can be heated uniformly, the emulsion can be prevented from being altered by local heating and good fluidity can be imparted, and the heat transfer medium is water. fire Not such as the occurrence of pollution even if the risk and water leakage, are superior to the waste, etc. is easy safety.

  According to the invention of claim 2, the emulsion tank is formed in a cylindrical shape, and in a semicircular shape in contact with the lower peripheral portion of the outer peripheral surface and forming the inside in a hot water chamber having a semicircular cross section. Since it is equipped with a curved jacket, the hot water can flow uniformly and smoothly in the longitudinal and circumferential directions in the semicircular hot water chamber, and the entire surface of the emulsion tank is in contact with the jacket. A constant temperature can be transmitted to the tank, and the structure is simple and can be easily incorporated into an existing cylindrical emulsion tank. In addition, since the heat insulating layer is layered from the outer peripheral surface of the jacket to the outer peripheral surface of the emulsion tank, the hot water flowing in the hot water chamber can be efficiently transmitted to the emulsion tank, and the emulsion in the emulsion tank is effective. Can be kept warm.

  Further, according to the invention of claim 3, since a part of the hot water circulation pipe is disposed in a state penetrating the emulsion spray pipe, the asphalt emulsion supplied into the spray pipe is also heated to an appropriate temperature by the hot water. Thus, the spray nozzle can be prevented from being clogged due to the alteration of the asphalt emulsion, and the asphalt emulsion maintained at a constant temperature can be smoothly sprayed from the spray nozzle toward the road surface.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a simplified side view of an asphalt emulsion spraying vehicle A, and an asphalt emulsion tank 1 (hereinafter referred to as an asphalt emulsion tank 1) on the vehicle body of the asphalt emulsion spraying vehicle A. The asphalt emulsion in the emulsion tank 1 is mounted on the lower part of the rear end of the vehicle body through the emulsion pumping pipe 12 by pressurizing the emulsion tank 1 by a pump or by high pressure air from the compressor. A plurality of pipes that are installed in asphalt emulsion spray pipes 13 (hereinafter simply referred to as emulsion spray pipes) consisting of pipes that are long in the width direction of the road, and are attached to the emulsion spray pipes 13 at small intervals in the length direction. The asphalt emulsion is sprayed on the road surface from the spray nozzle 14 of the book.

  As shown in FIGS. 2 to 4, the emulsion tank 1 is formed in a cylindrical shape having a fixed length with both end openings sealed by end plates, and the outer peripheral surface of the lower half, that is, the lower peripheral portion. A jacket 2 curved in a semicircular shape is attached to the outer peripheral surface over substantially the entire length. The jacket 2 has a semicircular inner metal plate 2a that is curved with a diameter equal to the outer peripheral diameter of the emulsion tank 1 and is in contact with the outer peripheral surface of the lower peripheral portion of the emulsion tank 1, and the inner side thereof. Openings between the upper ends of both sides of the semicircular outer metal plate 2b arranged side by side so as to overlap each other on the outer peripheral surface of the metal plate 2a and between one end and the other end in the length direction The portion is hermetically sealed by elongated end plates 2c and 2d, and a space surrounded by the inner and outer metal plates 2a and 2b and the end plates 2c and 2d is formed in a hot water chamber 3 having a semicircular cross section.

  The jacket 2 formed in this way is attached to the emulsion tank 1 by fixing the inner metal plate 2a in contact with the outer peripheral surface of the lower peripheral portion of the emulsion tank 1, but the emulsion is replaced with the inner metal plate 2a. The lower peripheral portion of the tank 1 may also be used as the inner metal plate of the jacket 2.

  The warm water chamber 3 formed by the hollow interior of the jacket 2 is divided into a plurality of compartments 3a to 3f by partition plates 4a to 4e arranged at predetermined intervals in the length direction thereof, that is, the length direction of the emulsion tank 1. The hot water inlet 3a is provided at the lower end of the compartment 3a on one end of the hot water chamber 3, and the hot water outlet 5b is provided at the lower end of the compartment 3f on the other end. The partition plates 4a to 4e are formed in the same cross-sectional shape as the hot water chamber 3, that is, a semi-annular shape, and the inner and outer peripheral end surfaces thereof are integrally fixed to the inner and outer opposing surfaces of the jacket 2 by welding or the like.

  Further, in these partition plates 4a to 4e, the upper flow port 6a and the lower flow port 6b are alternately provided from the partition plate 4a on the one end side toward the partition plate 4e on the other end side, from the hot water introduction port 5a. The hot water introduced into the compartment 3a on one end side is led out from the hot water outlet 5d while flowing so as to bypass each compartment 3a-3f in the vertical direction sequentially through the circulation ports 6a, 6b. Specifically, the partition plate 4a at one end is provided with a circulation port 6a at the upper end on both sides thereof, and the next partition plate 4b adjacent to the partition plate 4a is provided with a circulation port 6b at the lower end thereof. An upper flow port 6a and a lower flow port 6b are sequentially provided in the plates 4c to 4e. In addition, the upper distribution port is provided to the partition plate 4a disposed on the one end compartment 3a side provided with the hot water inlet 5a at the lower end and the partition plate 4e disposed on the other end compartment 3f side with the hot water outlet 5b on the lower end. The circulation ports 6a and 6b are alternately provided so that 6a comes, and all the compartments 3a to 3e are configured to slide while being filled with warm water.

  As shown in FIG. 2, the upper flow port 6a is formed by holes drilled in the upper end portions on both sides of the partition plate. A gap may be provided between the upper end surface of the chamber 3 and the hot water may overflow from the upper end surface of the partition plate into the adjacent compartment through the gap.

  FIG. 5 shows that warm water heated to a constant temperature is introduced into the warm water chamber 3 in the jacket 2 through the warm water inlet 5a and flows in the compartments 3a to 3f of the warm water chamber 3 so as to detour vertically. FIG. 2 is a circulation circuit diagram of hot water that is led out from the hot water outlet 5b and introduced into the hot water chamber 3 again, and the hot water pump 7 and the hot water pump 7 are disposed at appropriate positions on the vehicle body of the asphalt emulsion sprayer A. A heating means 8 by combustion of fuel is installed, and these hot water pump 7 and heating means 8 are arranged in the circulation line 9.

  The circulation line 9 connects between the suction port of the hot water pump 7 and the other end of the hot water chamber 3 in the jacket 2, that is, between the hot water outlet 5 b connected to the most downstream compartment chamber 3 f of the hot water chamber 3. One end is connected to the connected hot water outlet pipe section 9 a and the discharge port of the hot water pump 7, and the other end is one end of the hot water chamber 3 in the jacket 2, that is, the most upstream compartment 3 a of the hot water chamber 3. The hot water supply pipe section 9b connected to the hot water introduction port 5a connected to the pipe, and a part of this hot water supply pipe section 9b penetrates the emulsion spray pipe 13 in the length direction and the emulsion spray. A strainer 10 for filtering hot water is disposed in the middle of the hot water supply pipe portion 9b led out from the pipe 14, and further, a warm water supply pipe portion 9b between the strainer 10 and the hot water inlet 5a is provided. The hot water in the pipe is heated to a constant temperature while passing through the heating part of the heating means 8 and passing through the heating means 8. is doing.

  The heating means 8 burns fuel with good combustion efficiency such as LPG gas and light oil, and efficiently heats a part of the hot water supply pipe line portion 9b disposed in the heating portion of the heating means 8 by the combustion heat. Further, the heating means 8 is provided with an automatic temperature control function. The emulsion emulsion tank 1 is covered with a heat insulating layer 11 having a constant thickness as shown by a two-dot chain line in FIG. 2 including the jacket 2 mounted on the lower peripheral portion thereof. The jacket 2 is provided with an on-off valve from the outside so that water can be supplied through a water supply pipe (not shown).

  The operation of the heating device for the emulsion tank constructed as described above will be described as follows. When paving with the asphalt emulsion sprayer A, the circulation line is connected from the hot water chamber 3 in the jacket 2 mounted on the outer peripheral surface of the lower half of the emulsion tank 1. The hot water filled in 9 is circulated by operating the hot water pump 7, and the asphalt emulsion in the emulsion tank 1 is kept at a constant temperature by the hot water heated to a constant temperature (60 to 70 ° C.) by the heating means 8. Hold.

  Specifically, the warming water 8 is burned while hot water flowing through the supply pipe portion 9b of the circulation pipe 9 toward the one end warm water inlet 5a of the jacket 2 passes through the heating means 8 by the operation of the hot water pump 7. After being heated to a certain temperature by heat, it is introduced into the first compartment 3a in the hot water chamber 3 in the jacket 2 from the hot water inlet 5a. The hot water chamber 3 is filled with hot water at a certain height, and the amount of hot water in the compartment 3a is increased by the hot water introduced into the compartment 3a. From the upper flow port 6a provided at the upper end of the first partition plate 4a forming 3a, it flows into the next compartment 3a so as to overflow.

  On the other hand, the other end side of the jacket 2 is the same as the hot water supplied into the compartment 3a from the hot water outlet 5b communicating with the suction port side of the hot water pump 7 through the hot water outlet pipe portion 9a. Therefore, in the warm water chamber 3 of the jacket 2, the one end compartment 3 a on the warm water inlet 5 a side is set as the upstream side and the other end compartment 3 f on the downstream side of the warm water outlet 5 b is formed in the warm water chamber 3 of the jacket 2. Warm water will flow toward you.

  At this time, the hot water circulation ports leading from the partition plate 4a partitioning the partition chamber 3a on the one end side to the partition plate 3e partitioning the partition chamber 3f on the other end side alternately up and down As shown in FIG. 3, in the upstream compartment 3a, the hot water flows upward and flows into the next compartment 3b from the upper circulation port 6a of the first partition plate 4a. The hot water flows downward in the compartment 3b and flows into the lower end of the next compartment 3c from the flow port 6b provided on the lower side of the next partition plate 4b, and moves upward in the compartment 3c. In the following, the downstream of the jacket 2 is circulated from the hot water outlet 5b by flowing downward in the compartment 3f on the most downstream side while alternately flowing downward and upward in the compartments sequentially arranged toward the downstream side. It is led out to the lead-out pipe part 9a in the pipe line 9.

  Thus, in the hot water chamber 3 of the jacket 2, the hot water flows while detouring in the vertical direction from the upstream side to the downstream side as described above, so that the entire surface of the hot water chamber 3 is extended in the length direction and the circumferential direction. Accordingly, the lower peripheral portion of the emulsion tank 1 equipped with the jacket 2 is heated at a uniform temperature over the entire surface, so that the asphalt emulsion in the emulsion tank 1 is brought to an appropriate temperature, and the asphalt emulsion The asphalt emulsion is imparted with good fluidity while preventing its components from being altered.

  On the other hand, the hot water pumped from the discharge port of the hot water pump 7 into the emulsion supply pipe section 9b in the circulation pipe 9 passes through the emulsion spray pipe 13 while flowing through the pipe pipe section penetrating the emulsion spray pipe 13. By heating, the asphalt emulsion in the emulsion spraying tube 13 is kept at a constant temperature, and further passes through the strainer 10 from the emulsion spraying tube 13 to reach the heating means 8 and is heated to a constant temperature by the heating means 8. After the adjustment, the water is again introduced into the hot water chamber 3 in the jacket 2 from the hot water inlet 5a, and the asphalt emulsion in the emulsion tank 1 is heated and kept warm.

  Next, the asphalt emulsion in the emulsion tank 1 is supplied to the emulsion spraying pipe 13 provided at the rear end of the asphalt emulsion spraying vehicle A, and the road surface is supplied from the spraying nozzle 14 mounted on the emulsion spraying pipe 13. The asphalt emulsion spraying device to be sprayed will be briefly described. In this asphalt emulsion spraying device, as shown in FIG. 6, the bottom of the emulsion tank 1 and the emulsion spraying tube 13 are connected and communicated with each other by an emulsion pumping pipe 12. In addition, a return port 15 is provided at both ends of the emulsion spraying tube 13, and one end of the return tube 16 is connected to and communicated with the return port 15. The other end of the return tube 16 penetrates the peripheral wall of the emulsion tank 1. Then, the emulsion tank 1 is communicated.

  In order to send the emulsion in the emulsion tank 1 into the emulsion pumping pipe 12, a pumping pump may be used. In the figure, high-pressure air is pumped into the emulsion tank 1 by a compressor 17 (shown in FIG. 1). The emulsion tank 1 is pressurized by the high-pressure air so that the emulsion in the emulsion tank 1 is pumped to the emulsion pumping pipe 12. Further, a three-way switching valve 18 is interposed in the emulsion pressure feeding pipe 12 so that asphalt emulsion from the emulsion tank 1 side or high-pressure air from the compressor 17 side can be supplied to the emulsion spraying pipe 13 by the three-way switching valve 18. In addition, an opening / closing valve 19 is interposed in the return pipe 16. In addition to the emulsion pressure feed pipe 12, an emulsion feed / discharge pipe 20 is connected to the emulsion tank 1, and an emulsion handing bar 21 and an emulsion feed / discharge hose 22 are connected to the emulsion feed / discharge pipe 20 via a switching valve. Connected.

  With this configuration, in order to spray asphalt emulsion on the road surface, the three-way switching valve 18 causes the emulsion tank 1 to communicate with the emulsion spraying pipe 13 through the emulsion pumping pipe 12 and through the return pipe 16. When the on-off valve 19 mounted is closed and high pressure air is pumped into the emulsion tank 1 by the operation of the compressor 17, the hot water chamber 3 of the jacket 2 mounted on the outer peripheral surface of the lower peripheral portion of the emulsion tank 1. The emulsion in the emulsion tank 1 that is maintained at a constant temperature by flowing hot water is pumped to the emulsion spraying pipe 13 through the emulsion pumping pipe 12, and a number of distribution nozzles 14 mounted on the emulsion spraying pipe 13 are fed to the road surface. It is to be distributed. At this time, the emulsion spray tube 13 is also kept warm with hot water as described above, and can be smoothly distributed from the spray nozzle 14.

  In the case of primary suspension during the emulsion spraying operation, the on-off valve (not shown) of each spray nozzle 14 is closed and the on-off valve 19 in the return pipe 16 is opened. The emulsion fed into the pressure feeding pipe 12 flows through the emulsion spraying pipe 13, flows into the emulsion tank 1 from the return port 15 through the return pipe 16, and circulates again to the emulsion pressure feeding pipe 12 side.

  After the spraying operation is completed, the three-way switching valve 18 is switched so that the compressor 17 side and the emulsion pressure feeding pipe 12 communicate with each other, and all the spray nozzles 14 are closed and the on-off valves 19 on the return pipe 16 side are closed. When high pressure air is pumped into the emulsion pumping pipe 12 in an open state, the high pressure air flows from the emulsion pumping pipe 12 through the emulsion spraying pipe 13 and the return pipe 16, and the emulsion in these pipes is fed into the emulsion tank 1. And the inside of these tubes is cleaned by high-pressure air.

  Further, when the on-off valve 19 on the return pipe 16 side is closed and the on-off valves of all the distribution nozzles 14 are opened at the same time, and high-pressure air is supplied into the emulsion pumping pipe 12, the high-pressure air is supplied to the emulsion spraying pipe 13 The asphalt emulsion ejected from all the spray nozzles 14 through the inside and remaining in the spray nozzle 14 is discharged to the outside and the interior of the spray nozzle 14 is washed. Incidentally, the emulsion can be manually handed using the hand bar 21 and the inside of the hand bar 21 can be cleaned by using high-pressure air in the same manner as described above. The emulsion feed / discharge hose 22 is used for discharging all the emulsion in the emulsion tank 1 or supplying the emulsion into the emulsion tank 1, but its detailed operation is omitted.

A simplified side view of an asphalt emulsion sprayer. The front view of the emulsion tank which cut the jacket part. The side view which notched a part of the jacket. The simplified perspective view of the jacket with which the lower peripheral surface of an emulsion tank is equipped. Circulation line diagram of hot water. The piping system figure of a solution spraying apparatus.

Explanation of symbols

A Asphalt Emulsion Spreader 1 Emulsion tank 2 Jacket 3 Hot water chamber
3a-3f compartment
4a ~ 4e Partition plate
5a Hot water inlet
5b Hot water outlet
6a Upper distribution port
6b Lower distribution port 7 Hot water pump 8 Heating means 9 Circulation line
12 Emulsion pumping pipe
13 Spread tube
14 Dispersion nozzle

Claims (3)

  Asphalt emulsion spraying configured to spray asphalt emulsion from an asphalt emulsion tank mounted on an asphalt emulsion spraying vehicle to the emulsion spraying pipe through the emulsion pressure feeding pipe, and to spray the asphalt emulsion from a plurality of spraying nozzles provided in the emulsion spraying pipe. A device for heating the above emulsion tank in the apparatus, wherein a jacket having a hot water chamber formed inside is mounted on the outer peripheral surface of the emulsion tank, and is introduced into one end of the hot water chamber in the length direction of the emulsion tank. The hot water outlet port is provided at the other end, and the hot water inlet port and the hot water inlet port are connected to each other by a hot water circulation line provided with a hot water pump and heating means disposed outside the emulsion tank. Furthermore, the hot water chamber is partitioned into a plurality of compartments by a plurality of partition plates arranged at predetermined intervals in the length direction of the emulsion tank. The upper flow port and the lower flow port are alternately provided from the partition plate on one end side to the partition plate on the other end side, and the hot water introduced into the compartment on the one end side from the hot water introduction port is supplied to each partition through the flow port. An apparatus for heating an emulsion tank in an asphalt emulsion spraying apparatus, wherein the apparatus is configured to flow from a hot water outlet while flowing in a manner so as to bypass the compartment in the vertical direction.   The emulsion tank is formed in a cylindrical shape and is fitted with a semicircular curved jacket that is in contact with the lower peripheral portion of the outer peripheral surface and forms a semicircular hot water chamber with a semicircular cross section. The emulsion tank heating device in an asphalt emulsion spraying apparatus according to claim 1, wherein the outer peripheral surface of the emulsion tank including the outer peripheral surface of the emulsion tank is covered with a heat insulating layer having a constant thickness.   The apparatus for heating an emulsion tank in an asphalt emulsion spraying apparatus according to claim 1, wherein a part of the hot water circulation pipe is passed through the spraying pipe.

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