JPH0665805B2 - Hot water injection type snow melting machine - Google Patents

Description

The present invention relates to a device for melting snow at a place where snow is to be removed and discharging it as water.

The conventional method is to boil hot water in a large water tank and throw snow into it to melt it. However, in this method, if a large amount of snow is thrown into the water storage tank, the temperature of the hot water will rapidly drop, and snow melting will be impossible. Also,
If you poured snow to the extent that the temperature of the hot water did not drop,
It takes too much time to remove snow and it is not practical. In order to eliminate this drawback, it is necessary to increase the temperature of the hot water so that it will not drop easily and to equip it with a stirrer, etc., but this would result in extremely high costs and transport the snow by truck. However, it is cheaper to throw them in the designated snow dump. Therefore, it was necessary to change the basic snow melting method in order to manufacture a snow melting machine that can be used for general purposes.

FIG. 1 to FIG. 3 show the whole of a device prototyped as one embodiment of the present invention.

The upper half of the device is a device for injecting hot water into the snowmelt, including the snow melting tank 2, and the lower half of the device is a hot water boiler.
In the present invention, the former device is important, but in a hot water boiler as well, the outline of which is shown in FIG. 1 must satisfy the functional requirements of this device. The structure will be specifically described below.

There is a snow melting tank 2 at the top of the device, and a snow melting water reservoir 3 is provided at the bottom of the snow melting tank in order to secure the water to be supplied to the heat exchanger 7 in the hot water boiler. The snow brace support screen 12 of the above is passed. Further, in order to discharge the snowmelt water, a drainage port 4 is provided in the lower part of the snowmelt tank side plate, and a drainage gutter 5 and a drainage pipe 6 are attached to the outside thereof. A hot water jetting cylinder 1 is installed inside the snow melting tank, and this is connected to a heat exchanger 7 of a hot water boiler at the bottom of the device. A dozen or more small-diameter holes are formed on the side surface of the upper end portion of the hot water jetting cylinder 1, and hot water is jetted from this hole. The heat exchanger 7 is connected to the snow melting water reservoir 3 by a water circulation pipe 8 provided at the center of the device. As a result, as a whole, a circulation circuit for snow melting water is formed through the snow melting tank 2 and the snow melting water reservoir 3.

Before using this device, the heat exchanger 7, the water circulation pipe 8 and the snow melting water reservoir 3 are filled with water in advance. And
The water in the heat exchanger 7 is heated and boiled by the kerosene burner 10 to jet hot water of 80 to 90 ° C. from the hot water jetting cylinder 1. Here, snow is thrown into the snow melting tank 2 to start snow melting. Since the hot water is directly injected into the snow mass from the upper end of the hot water spouting cylinder 1, there is almost no heat dissipation to the outside air, and the retained heat of the hot water provided by the hot water boiler can be used as it is for snow melting. Moreover, since the jetted hot water is always kept at a high temperature, it has the ability to quickly melt even if an ice mass is thrown in. Both the warm water injected into the snow mass and the snow that has absorbed the heat and melted become water of about zero degrees Celsius. Most of the water flows out from the drainage port 4 through the drainage gutter 5 and the drainage pipe 6, but on the other hand, part of the water is
It falls into the snow melting water reservoir 3, passes through the central water circulation pipe 8 and descends to the bottom of the hot water boiler, and is supplied to the heat exchanger 7.

In this method, the state of hot water injected into the snow mass from the hot water jet cylinder is (temperature, amount of hot water, jet pressure, amount of steam mixed)
It greatly affects the ability to melt snow during melting. To prevent heat loss while hot water arrives from the hot water boiler to the snow,
Abolishing all power sources such as pumps, natural development is used to spray hot water. Hereinafter, the principle will be described in detail.

When the snow melting machine is started, water must be poured until the snow melting water reservoir 3 is full. In this state, since the snowmelt water reservoir 3 and the hot water jetting cylinder 1 are both placed under atmospheric pressure, the heights of both water surfaces are the same. The maximum water level of the snowmelt water reservoir 3 approximately matches the snowmelt water level during steady operation. In order to spray the hot water from the jet hole, the hot water must be lifted by the height h from the water level for snow melting to the hole. It is considered that the water heated by the kerosene burner 10 is boiling in the heat exchanger 7 during the steady operation. The bubbles generated at this time have a high internal pressure and try to expand. This pressure pushes up the water surface in the hot water jetting cylinder, and if the pressure is sufficient, the hot water is sprayed outside through the jetting holes. The spouting state of warm water changes significantly depending on the height h, and the optimum height h is obtained through experiments and the like. Need to decide,
(In this device, the optimum height means the height when hot water of high temperature is jetted.) As shown in the schematic view of FIG. 4, h ≦ h.
Then hot water gushed out, h> h. Then, steam is ejected. Although steam is hot, it does not melt snow much, so
Not suitable for this device. h = h. At the time of, hot water spouts out vigorously and melts the snow mass quickly. h <
h. At this time, the temperature of hot water decreases as h decreases, and the jet pressure also decreases. Therefore, the snow melting capacity shows a remarkable decrease. Although the principle of spraying warm water is simple, it is characterized by skillfully utilizing natural phenomena to save energy, and has good reproducibility and stable performance.

According to this invention, the hot water jetting cylinder is installed in the snow melting tank,
By connecting this hot water jet to a hot water boiler conforming to the present invention, high-temperature hot water can be continuously and efficiently injected into the central portion of the snow mass thrown into the snow melting tank, and the snow can be quickly supplied. It can dissolve.

[Brief description of drawings]

FIG. 1 is a central sectional view of one embodiment of the present invention. FIG. 2 is a plan view of the same embodiment. FIG. 3 is a right side view of the same embodiment. FIG. 4 is a schematic diagram for explaining the principle of hot water spraying in the present invention. FIG. 5 shows a snow melting tank 2 and a snow melting water reservoir 3.
3 is a detailed side view of the positional relationship between the drainage port 4 and the drainage port 4. FIG. 1 ... Warm water jetting cylinder, 2 ... Snow melting tank, 3 ... Snow melting water reservoir, 4 ... Drainage port, 5 ... Drainage gutter, 6 ... Drainage pipe, 7 ... Heat exchanger, 8 ... Water circulation pipe, 9 ...... Combustion chamber, 10 …… Kerosene burner 11 …… Chimney, 12 …… Snow block support screen

Claims (1)

[Claims] 1. A hot water injection type snow melting machine having an upper half portion as a snow melting tank 2 and a lower half portion as a hot water boiler. Inside the snow melting tank 2, hot water heated by a heat exchanger 7 in the hot water boiler is An appropriate number of hot water jetting cylinders 1 having a plurality of hot water jetting holes are provided at a height h (h = ho) at which they are horizontally jetted by the pressure when boiling, and at the bottom of the snow melting tank 2. In order to secure water to be supplied to the heat exchanger 7 of the hot water boiler, a snowmelt water reservoir 3 having a snow block supporting screen 12 for preventing ice and snow mixture is provided on the upper surface thereof. , Snow mass support screen 1 on the side of the snow melting tank 2
A drainage port 4 for discharging snowmelt water is provided directly above 2, and the water reservoir 3 for snowmelt and the heat exchanger 7 of the hot water boiler are connected by a water circulation pipe 8. Injection snow melting machine.