JPS6226666Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a road surface heating device that heats a road surface with a flame ignited in a burner and is used for paving or melting snow.

This type of device has been used for a long time, but since the fuel supplied to the burner is vaporized LPG sent from the cylinder through natural vaporization, the LPG is cooled by the latent heat of LPG evaporation inside the cylinder. If you use it in a season when the temperature is below 5℃, gaseous LPG will not evaporate from the cylinder.
In the case of a 10 kg cylinder, about 5 kg of LPG remained in the cylinder and became unusable, resulting in extremely poor efficiency and the cylinder having to be replaced after a short period of use.

In view of the above-mentioned difficulties, the present invention does not use gaseous LPG through natural vaporization, but uses a cylinder in which liquid LPG is stored in a pressurized state in advance, and uses a vaporizer to collect liquid LPG flowing out from the cylinder. By making it possible to use it as a fuel, it not only eliminates the above-mentioned defects of the conventional example, but also
By arranging various appropriate components in a desirable manner, it is possible to fully demonstrate its function as a vaporizer, and even with liquid LPG, sufficient firepower can be expected, and the ignition operation is simple and reliable. Its purpose is to enable implementation.

To describe the present invention in detail with reference to the illustrated embodiment, FIG. 1 shows a hand-push vehicle 1 equipped with a device according to the present invention, in which a heat shield 3 with an opening 2 on the lower surface of the device is shown. , is attached to the running body 1 having wheels 4, 4, and a hand push arm 5 is attached to the rear of the running body 1.
A cylinder storage section 6 for a pressurized cylinder A is provided.

Now, inside the heat shield 3, a pair of porous combustion tubes 7, 7' are installed as shown in FIG. The base end of the burner 8, 8' is fixedly fixed, and the main burners 8, 8' are protruded from the end side wall 3' into the respective combustion tubes 7, 7', and the end ports of the burners 8, 8' are fixed. Flame vents 9, 9' are opened in the combustion tubes 7, 7' in the vicinity.

Furthermore, inside the heat shield 3, the porous combustion tube 7,
7', the vapor riser 10 is fixedly installed in the vicinity of the vapor riser 10 in the illustrated example.
0 is fixedly protruding from the end side wall 3', and is arranged in an upper space between the porous combustion tubes 7, 7' as shown in FIG.
7', the end side wall 3' has a pilot burner 11 located close to one end side of the vapor riser 10, and a flame guide which surrounds the burner 11 with the upper, lower and front walls 12'. The flame vents 9, 9' are located slightly closer to the end wall 3' than the front wall 12', and 13 in the figure is a pilot burner 11.
The air holes 14, 14' indicate support plates fixing the porous combustion tubes 7, 7' to the heat shield 3.

Next, the piping system connecting the above-mentioned constituent members and the pressurized cylinder A will be explained.
Main piping leading to each of the above-mentioned main burners 8, 8' via a pressure regulator 15 - opening/closing valve 16 - vaporizer 10 - ignition valve 17 for lowering the pressure of liquid LPG to about 0.5 to 2 kg/cm ² G. 18 is formed, and the orifice 1 is connected from the pipe 18 from the front side of the vapor riser 10.
A pilot pipe 20 connected to a pilot burner 11 branches through a pipe 9, and a torch burner 22 with an on-off valve is led out from the main pipe 18 from the downstream side of the vaporizer 10.

Therefore, in order to use the above configuration, the on-off valve 16 is opened and the liquid LPG in the pressurized cylinder A is allowed to flow into the main pipe 18, so that the liquid LPG is gasified by the vapor riser 10, and this gaseous LPG is When the on-off valve 21 is opened, the gas flows out from the torch burner 22 and is ignited.

On the other hand, since the liquid LPG is vaporized to some extent by the orifice 19 and flows out from the pilot burner 11, the pilot burner 11 can be ignited by the ignition flame of the torch burner 22.

In this way, the pilot flame of the pilot burner 11 is injected onto the flame guiding plate 12, which is deflected, and the flame enters into the porous combustion tubes 7, 7' through the flame openings 9, 9'. At this time, the pilot flame can heat one end of the vapor riser 10 that is in close proximity, improving the gasification efficiency. Therefore, if the ignition valve 17 is opened appropriately, the vapor riser Since the vaporized LPG vaporized by the main burner 10 is supplied to the main burners 8, 8', the burners 8, 8' are ignited by the pilot flame whose direction is changed.

Since the porous combustion tubes 7, 7' are thus heated by the flames from the main burners 8, 8', the resulting hot air heats the road surface through the openings 2 of the heat shield 3.

The present invention, as embodied by the above embodiments,
The heat shield 3 opened at the bottom includes a pair of porous combustion tubes 7 and 7', a vapor riser 10 adjacent thereto, and a pilot burner 11 adjacent to one end of the vapor riser 10, which is ignited. A flame guide plate 12 to which the pilot flame of the pilot burner 11 is injected is fixedly installed inside each of the main burners 8, 8', which are installed inside one end side of the porous combustion tubes 7, 7'. Flame vents 9, 9' are provided in the porous combustion tubes 7, 7' for ignition of the main burner, through which the pilot flame directed by the flame guide plate 12 enters, and the flame vents 9, 9' are provided for supplying liquid LPG. The pressure cylinder A is connected to a main pipe 18 that branches into the pair of main burners 8 and 8' via a vapor riser 10 and an ignition valve 17.
A pilot pipe 2 is connected to the pilot burner 11 via an orifice 19 from the vapor riser 10 front side of the main pipe 18.
0 is branched, and a torch burner 22 is connected to the downstream side of the vapor riser 10 of the main pipe 18, so that even in seasons such as winter, the pressurized cylinder A does not contain any gas until it is exhausted. This eliminates the conventional drawbacks of liquid LPG spilling out and leaving fuel in the cylinder, and also prolongs the usage time of the cylinder A, reducing the hassle of replacing it. This reduces the amount of money spent.

Furthermore, although liquid LPG is used in the present invention, the main burners 8, 8' In addition, since the vaporizer 10 is located within the heat shield 3 and close to the porous combustion tubes 7 and 7', the liquid LPG is efficiently gasified. Also, by using liquid LPG, a burner with a large capacity can be made smaller and lighter.

[Brief explanation of the drawing]

Fig. 1 is a side view of a hand-push vehicle equipped with the device according to the present invention, Fig. 2 is an explanatory view of the back piping with a part of the device cut away, and Fig. 3 is a cross-sectional view taken along the - line in Fig. 2. It is. 2... Opening, 3... Heat shield, 7, 7'... Porous combustion tube, 8, 8'... Main burner, 9,
9'... Flame outlet, 10... Vaporizer, 1
1...Pilot burner, 12...Flame guide plate, 1
7...Ignition valve, 18...Main piping, 19
... Orifice, 20 ... Pilot piping, 22
...Torch burner.

Claims (1)

[Scope of utility model registration request] The heat shield, which is open at the bottom, has a pair of porous combustion tubes attached to it, a vapor riser that is close to it, a pilot burner that is close to one end of this vapor riser, and a pilot of the lit pilot burner. A flame guide plate through which flame is ejected is fixedly installed inside each of the main burners, and each main burner installed inside one end of the porous combustion tube has a flame guide plate that is perforated in the porous combustion tube and that is changed by the flame guide plate. A pressurized cylinder that supplies liquid LPG is installed at the flame opening for ignition of the main burner through which the directed pilot flame enters, and the main burner is branched into the pair of main burners via a vapor riser and an ignition valve. By connecting the piping, the pilot piping connected to the pilot burner via an orifice is branched from the vapor riser front side of the main piping, and a torch burner is connected to the vapor riser rear side of the main piping. Road heating device.