JP7285460B1 - snow melting method - Google Patents

Abstract

A snow melting vehicle that efficiently supplies a large amount of hot water to melt snow is provided. A vehicle (2), a water tank (4), a high-pressure hot water supply device (5), and a plurality of injection nozzles (16) provided on the underside of the vehicle (2) are provided. It consists of a snow melting vehicle (1). A high pressure hot water supply (5) heats and pressurizes water from the water tank (4) and discharges it. A channel switching valve (28) is provided at the outlet (5out) of the high-pressure hot water supply device (5), and when the channel switching valve (28) is set to the first switching state, hot water is supplied to the water tank (4). let it be returned. As a result, the water in the water tank (4) can be warmed. Hot water is supplied to the injection nozzle (16) when the flow path switching valve (28) is set to the second switching state. As a result, hot water is injected to melt the snow on the paved road surface. [Selection drawing] Fig. 3

Description

The present invention relates to a method of melting snow using a snow-melting vehicle that melts snow accumulated on a paved road surface while traveling on the paved road surface, and is not limited to this method, but is used in urban areas where the amount of snowfall is relatively small. The present invention relates to a snow-melting method using a snow-melting vehicle suitable for melting accumulated snow on an elevated road.

Snow accumulation on paved roads hinders safe driving, and is a serious problem especially in urban areas where the use of studless tires is low, causing not only traffic jams but also road closures. It is necessary to properly remove the snow accumulated on the pavement. By the way, when the snow is removed by a snowplow, for example, a space for stacking the snow is required, or the snow needs to be carried outside by a dump truck and discarded. However, in urban areas, it is not possible to secure a space for piling up snow, and it is also difficult to secure a disposal site. Therefore, especially in urban areas, it is preferable to melt the snow accumulated on the paved road surface instead of removing the snow.

As a snow melting vehicle that melts snow accumulated on a paved road surface, a type that sprinkles hot water on the snow on the paved road surface is well known. When hot water is sprinkled, the snow melts due to the thermal energy of the hot water. However, when the hot water is sprinkled, the hot water may flow over the snow and run off, resulting in a state in which the thermal energy of the hot water is not fully utilized. Especially when the surface of the snow is frozen, part of the hot water flows over the surface of the snow and disappears into the roadside zone. In other words, the efficiency of snow melting may not be high. In response to this, the applicant of the present application has proposed a snow melting vehicle capable of efficiently melting snow on a paved road surface in Patent Document 1.

JP-A-2022-34512

The snow melting vehicle described in Patent Document 1 consists of a self-propelled vehicle and a group of devices mounted on the vehicle. The device group consists of a water tank, a high-pressure hot water supply device that heats the water in the water tank to make it hot water and supplies it at a high pressure of 10 MPa or more, and a plurality of injection nozzles provided on the underside of the vehicle. Some of the injection nozzles are arranged in a direction perpendicular to the running direction at intervals of 50 cm or less toward the front of the vehicle, and some of the injection nozzles are arranged on a disk provided toward the rear of the vehicle. The disk rotates. When the hot water is sprayed from the spray nozzle at a high pressure of 10 MPa or more, holes are formed in the accumulated snow on the paved road surface, and the hot water penetrates deeply. In other words, the hot water flows over the snow surface and does not flow out. The hot water that permeates the snow is used without waste for melting snow. That is, the efficiency of snow melting is high. Furthermore, the injection nozzles are arranged at intervals of 50 cm or less. The snow on the paved road surface is uniformly melted without leaving a part of it.

The snow-melting vehicle described in Patent Document 1 jets hot water at high pressure against accumulated snow on a paved road surface, so it is possible to make holes in the surface of the accumulated snow and allow the hot water to penetrate deeply, which is highly efficient and excellent. . However, there are some problems to be solved. Specifically, the problem is the load on the high-pressure hot water supply system. The high pressure hot water supply is equipped with a boiler that heats the water to hot water. Since the hot water is jetted from a plurality of jet nozzles arranged at intervals of 50 cm or less as described above, a relatively large amount of hot water is required per hour. When it snows, the water in the water tank is close to 0°C, but the load on the boiler is large to make a large amount of hot water in a short time. In order to solve this problem, it is conceivable to adopt a large-sized high-pressure hot water supply device equipped with a large-sized boiler, for example. However, the large-sized high-pressure hot water supply device is heavy, and there is a problem that the weight of the snow-melting vehicle is increased. On the other hand, it is also conceivable to reduce the number of injection nozzles to reduce the amount of hot water required per hour. However, if the number of injection nozzles is reduced, snow may not be sufficiently melted and snow may remain on the paved road surface, and this is also unacceptable.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems. To provide a snow melting method using a snow melting vehicle which does not require a large-sized high-pressure hot water supply device without increasing the load.

The present invention uses a snow melting vehicle equipped with a self-propelled vehicle, a water tank, one or more high-pressure hot water supply devices, and a plurality of injection nozzles provided on the underside of the vehicle. Configured as a snow melting method. The high-pressure hot water supply device is provided with an inflow part and an outflow part in the snow melting vehicle . When the water in the water tank is supplied from the inflow part, the water is heated and pressurized, and high-pressure hot water is supplied from the outflow part. It is designed to be discharged. A flow path switching valve is provided downstream of the outflow part, and when the flow path switching valve is set to the first switching state, the hot water is returned to the water tank, and when the flow path switching valve is set to the second switching state, the hot water is returned. Hot water is supplied to the injection nozzle and configured to be sprayed onto the snow on the pavement. The snow melting method of the present invention comprises a preparation step and a snow melting step. In the preparatory step, the flow path switching valve in the snow melting vehicle is set to the first switching state, and the high-pressure hot water supply device is driven to heat cold water in the vicinity of 0°C in the water tank to hot water of 25 to 35°C. In the snow melting process, the flow path switching valve is set to the second switching state, the high-pressure hot water supply device is driven, and the hot water heated in the preparation process is converted to hot water of 80 ° C. or higher and high pressure is applied from the injection nozzle to the paved road surface. Configured to spray on top snow.

According to the present invention, the hot water discharged from the high-pressure hot water supply system is returned to the water tank when the flow switching valve is set to the first switching state. In other words, it is possible to warm the water in the water tank, which is near 0°C during the harsh winter. Then, the cold water in the water tank can be changed to hot water of about 25 to 35°C, for example. If the water in the water tank is warm water, the load of heating from hot water to hot water is relatively small. Therefore, the high-pressure hot water supply device can efficiently heat a large amount of water and discharge a large amount of hot water. A large amount of hot water can be injected from the injection nozzle when the flow path switching valve is set to the second switching state. Since the load of the high-pressure hot water supply device is small, there is no need to make it large, and the weight of the snow melting vehicle can be made relatively small. Using such a snow-melting vehicle, cold water near 0°C in the water tank is heated in the preparation process to hot water of 25 to 35°C, and the hot water heated in the snow-melting process is heated to hot water of 80°C or higher. High pressure is applied from the injection nozzle to the snow on the paved road surface, so the efficiency is high. In other words, although a sufficient amount of hot water can be jetted per hour to efficiently melt snow, the load on the high-pressure hot water supply system does not increase, and a large high-pressure hot water supply system is not required. done.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the snow melting vehicle which concerns on this Embodiment, (A) is a side view of a snow melting vehicle, (B) is a top view of a snow melting vehicle. (A) is a top view of a front injection unit comprising a plurality of injection nozzles provided toward the front in the snow melting vehicle according to the first embodiment, and (B) is a top view of the embodiment. 1 is a top view of a rotary injection unit composed of a plurality of injection nozzles provided on a rotating disk at a rear side of the snow melting vehicle according to FIG. FIG. 4 is a piping diagram showing piping of the snow melting vehicle according to the present embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. A snow melting vehicle 1 according to an embodiment of the present invention comprises a self-propelled vehicle 2, as shown in FIGS. 1(A) and 1(B). A loading platform of the vehicle 2 is provided with one water tank 4 and six high-pressure hot water supply devices 5, 5, . The high-pressure hot water supply devices 5, 5, . . . are composed of a fuel tank 5a, an engine-driven pump 5b, and a heating device 5c. The high-pressure hot water supply devices 5, 5, . . . heat the water supplied from the water tank 4 by heating the fuel from the fuel tank 5a with the heating device 5c, ie, the boiler. The water is, for example, hot water of 80° C. or higher, preferably 95° C. or higher. Then, the engine is driven by the fuel from the fuel tank 5a, and the hot water is discharged with a water pressure of 10 MPa or more, preferably 15 to 20 MPa by the pump 5b. In this embodiment, the high-pressure hot water supply devices 5, 5, . The high-pressure hot water supply devices 5, 5, . . . are connected to piping which will be described in detail later. Spare fuel tanks 9, 9, .

A plurality of injection units for injecting high-pressure hot water supplied from high-pressure hot water supply devices 5, 5, . . . That is, a front injection unit 11 is provided near the front of the vehicle 2, and rear injection units 13, 13, . . . As shown in FIG. 2A, the front injection unit 11 includes a bar 15 having a length substantially equal to the width of the vehicle 2 and a plurality of injection nozzles provided on the bar 15 at regular intervals. It is composed of nozzles 16, 16, . . . In the forward injection unit 11, the distance between the injection nozzles 16, 16, . . . is preferably within 25 cm. That is, they are arranged at intervals of about 20 cm in a direction perpendicular to the traveling direction of the vehicle 2 . The forward injection unit 11 has a variable angle with respect to the vehicle 2, so that the injection nozzles 16, 16, . can.

As shown in FIG. 2B, the rear injection unit 13 includes a support bar 20, two discs 21, 21 provided on the support bar 20, and two discs 21, 21, respectively. It is composed of a plurality of jet nozzles 16, 16, . . . provided. In the figure, two injection nozzles 16, 16 are provided for each disk 21, but the number may be three or more. Although not shown in the drawings, the rear injection unit 13 is provided with a rotary drive mechanism so that the discs 21, 21 rotate with respect to the support bar 20 at a constant speed. The rear injection units 13, 13, . . . are adjustable in height. In other words, hot water can be jetted from a desired height to the accumulated snow S on the paved road surface H.

The snow melting vehicle 1 according to this embodiment is characterized by a pipe 25 that connects the water tank 4, the high-pressure hot water supply devices 5, 5, . The piping 25 will be explained with reference to FIG. The pipe 25 is composed of three sections. A pipe 26 corresponding to the first section supplies the water in the water tank 4 to the high-pressure hot water supply devices 5, 5, . The water tank 4 is provided with an outflow portion 4out at its lower portion, and the high-pressure hot water supply devices 5, 5, . . . are provided with inflow portions 5in, 5in, . A pipe 26 connects the outflow portion 5out and the inflow portions 5in, . . . .

The high-pressure hot water supply devices 5, 5, . . . are provided with outflow portions 5out, 5out, . 28, . . . are provided. Each of the channel switching valves 28, 28, . . . may be composed of one valve, or may be composed of two valves as shown in FIG. Alternatively, it may be composed of a greater number of valves.

Pipes 30a, 30b corresponding to the second section and pipes 31, 31, ... corresponding to the third section are connected to the flow path switching valves 28, 28, ... respectively. . The pipes 30a, 30b of the second section are connected to the front injection unit 11 and the rear injection unit 13, and supply high-pressure hot water to the injection nozzles 16, 16, . ing. On the other hand, pipes 31 , 31 , . . . corresponding to the third section are connected to the water tank 4 . The flow path switching valves 28, 28, . . . can be switched between first and second switching states. In the first switching state, high-pressure hot water from the high-pressure hot water supply devices 5, 5, . . . . When the second switching state is set, high-pressure hot water from the high-pressure hot water supply devices 5, 5, . It has become so.

A method of driving the snow melting vehicle 1 according to the present embodiment will be described. As shown in FIG. 1, when snowfall S occurs on the paved road surface H due to snowfall, the snow melting vehicle 1 is dispatched. The water in the water tank 4 is near 0°C. First, a preparatory step is performed to warm the water in the water tank 4. - 特許庁First, the channel switching valves 28, 28, . . . are set to the first switching state. Next, the high-pressure hot water supply devices 5, 5, . . . are operated. Then, the water from the water tank 4 is supplied to the high pressure hot water supply devices 5, 5, . . . The high-pressure hot water supply devices 5, 5, . . . heat the water to 80° C. or higher and discharge it. The discharged water is returned to the water tank 4 via the third section of piping 31, 31, . As a result, the temperature of the water in the water tank 4 rises. For example, after about 15 minutes of operation, the temperature of the water in the water tank reaches around 30°C. That means hot water. Complete the preparation process when the water is at the correct temperature.

Carry out the snow melting process. The flow path switching valves 28, 28, . . . are set to the second switching state. Next, the high-pressure hot water supply devices 5, 5, . . . are operated. Since hot water is supplied from the water tank 4, the load on the high-pressure hot water supply devices 5, 5, . . . Therefore, a large amount of water can be efficiently heated. For example, hot water of 98° C. is discharged at a water pressure of 10 MPa or more, preferably 15 to 20 MPa. Hot water at high pressure is supplied to the front injection unit 11, the rear injection units 13, 13, . High-pressure hot water is injected from each of the injection nozzles 16, 16, . . . to melt the accumulated snow S.

Various modifications of the snow melting vehicle 1 according to the present embodiment are possible. For example, the number of high-pressure hot water supply devices 5, 5, . . . is not limited to six, and may be five or less, or seven or more. By the way, the passage switching valves 28, 28, . . . are provided in all the high-pressure hot water supply devices 5, 5, . bottom. However, only some of the high pressure hot water supply devices 5, 5, . . . The water in the water tank 4 may be heated only by the hot water from the high pressure hot water supply devices 5, 5, . Variations are also possible for the injection unit. Another injection unit may be provided in the vehicle 2 between the front injection unit 11 and the rear injection units 13, 13, . Alternatively, it may be composed only of the front injection unit 11 and the rear injection units 13, 13, . . . may be omitted.

1 snow melting vehicle 2 vehicle 4 water tank 5 high pressure hot water supply device 5a fuel tank 5b pump with engine 5c heating device 5in inlet 5out outlet 9 spare fuel tank 11 front injection unit 13 rear injection unit 16 injection nozzle 25 pipe 26 first 28 channel switching valve
30a, 30b second section piping 31 third section piping

Claims (3)

A snow melting method for melting snow on a paved road surface using a snow melting vehicle,
The snow melting vehicle includes a self-propelled vehicle,
a water tank provided in the vehicle;
one or a plurality of high-pressure hot water supply devices provided in the vehicle;
a plurality of injection nozzles provided on the underside of the vehicle,
The high-pressure hot water supply device is provided with an inflow part and an outflow part, and when the water in the water tank is supplied from the inflow part, the water is heated and pressurized and discharged from the outflow part. and
A flow path switching valve is provided downstream of the outflow part, and when the flow path switching valve is set to the first switching state, the heated and pressurized water from the high-pressure hot water supply device flows into the water tank. When it is returned to the second switching state , heated and pressurized water from the high-pressure hot water supply device is supplied to the injection nozzle,
The snow melting method comprises a preparation step and a snow melting step,
In the preparation step, in the snow melting vehicle, the flow path switching valve is set to the first switching state, and the high-pressure hot water supply device is driven to heat the cold water of about 0 ° C. in the water tank to 25 to 35 degrees Celsius. Make sure to use warm water at ℃,
In the snow melting step, the flow path switching valve is set to the second switching state, the high-pressure hot water supply device is driven, and the hot water heated in the preparation step is converted to hot water of 80 ° C. or higher and the injection nozzle. A snow-melting method in which a high pressure is applied to the snow on the paved road surface. 2. The snow melting method according to claim 1, wherein said hot water jetted from said jet nozzle is set at 10 MPa or higher. A predetermined number of the plurality of injection nozzles are arranged side by side in a direction perpendicular to the running direction at intervals of 25 cm or less on the lower surface of the vehicle on the front side, and a predetermined number of the injection nozzles are arranged on the rear side of the vehicle. 3. The snow melting method according to claim 1 or 2, wherein the hot water is jetted from a disc that is rotationally driven and is provided on the underside of the vehicle.

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