JPH025244Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a safety device in a pot-type burner installed in a grain dryer as a device for generating hot air as drying air.

A pot-type burner device supplies fuel oil in small amounts to the combustion dish, and the fuel oil is vaporized and burned by a heating element. To prevent more than a certain amount of fuel oil from remaining unvaporized,
An overflow port is provided for overflow, and a receiver is provided below the overflow port to receive the fuel oil dripping from the overflow port, and excess fuel oil is collected in this receiver. If you do not know when the oil is full, fuel oil will overflow on all sides and there is a risk of fire, so if this tray is supported on a balance and more than a certain amount of fuel oil accumulates in the tray, the accumulated oil will be removed. A safety measure is taken to turn off the circuit that drives the fuel pump, which uses the weight of the fuel oil to rotate the balance and feed fuel into the combustion dish.

The purpose of the present invention is to provide the above-mentioned safety measure when the balance supporting the tray is shaken when fuel oil has accumulated close to a specified amount in the tray that receives the fuel oil dripping from the overflow port of the combustion pan. The movement started to repeat, and I had to turn on/off the fuel pump drive power.
The objective is to solve the problem of repeated off-cycles with a simple structure without complicating the structure.

For this purpose, the safety device for the burner for generating hot air in the grain dryer according to the present invention is provided with a funnel below the combustion tray of the pot-type burner to collect the fuel oil dripping from the overflow port of the combustion tray. Below the outlet of the funnel, there is a tray that can be supported by one end of a lever that can swing freely on a fulcrum, and the lever has a lever rod formed into a pipe and a ball that can roll freely in its inner cavity. The present invention is characterized in that a balance weight of the shape of the figure is inserted, and a switch for controlling the power supply for driving the fuel pump on and off is connected to the balance.

Next, an example of implementation will be described in detail with reference to the drawings.

In Figure 1, 1 is the body of grain dryer A, 2
Reference numeral 1 indicates an air guide path for hot air to be sent to the grains filled in the grain tank 10 in the machine body 1, 20 indicates a hot air intake port of the air guide path 2, and a indicates a pot-type burner disposed in the intake port 20. , f indicates a blower for feeding hot air generated by the pot burner a into the air guide path 2.

The pot-type burner a has an elbow-shaped combustion tube 4 connected to the upper part of a pot-shaped body 3 that houses a combustion plate 31 and a heating element 30, and the tip side of the combustion tube 4 (the right end side in Fig. 1). A flange 40 is provided in the opening of the
A reflector plate 41 is attached to the front side (right side in Fig. 1) with a slight interval d, and this reflector plate 41
A slit formed with the above-mentioned distance d between the flange 40 and the flange 40 is a conventionally known slit serving as the combustion gas ejection port 42.
A fuel supply pipe 32 extending from the discharge port of the fuel pump P is connected to the combustion dish 31, and an overflow port is provided for overflowing the supplied fuel oil. A flow port 33 is provided, and a drain pipe 34 is connected to the overflow port 33.

Reference numeral 5 denotes a funnel that collects the fuel oil dripping from the drain pipe 34 and the bottom side of the body 3, and is positioned below the combustion dish 31 of the pot burner a and fixedly supported on the body 1.

Reference numeral 6 denotes a receiving tray for receiving the fuel oil discharged from the outlet 50 of the funnel 5, which is connected to a fulcrum Y provided on the fuselage 1.
In addition, it is attached and supported at one end of a balance 7 which is swingably and removably supported around the fulcrum.
The receiving tray 6 is formed into a vertically long bottle shape with a small diameter receiving port 60, and is attached to a lever rod 70 of the balance 7.
is fixedly supported at the end opposite to the side on which the weight W is provided. The lever 70 of the balance 7 that supports the receiving tray 6 is formed of a hollow pipe, and a ball-shaped balance weight 71 is inserted into the inner cavity of the balance 7, which extends from the pipe. It is inserted so that it can roll freely in the longitudinal direction of the lever rod 70.

When fuel oil accumulates in the saucer 6 supported by the balance 7, and the weight of the fuel oil causes the saucer 6 side of the balance 7 to rotate downward, the rotating action causes the combustion tray 31 to A switch provided to turn off the drive power of the fuel pump P that supplies fuel oil, formed as a limit switch and located on the lower surface of the lever 70 of the balance 7 on the side closer to the weight W than the fulcrum Y. It is fixedly supported by the machine body 1, and the balance 7
Since the weight W side of the balance 7 is descending, it is pressed by the lever rod 70 of the balance 7 and held on, and the balance 7
As shown in FIG. 2, the lever is connected to a balance 7 so as to be turned off when the lever is rotated toward the tray 6 and the pressure is released. The switch S is connected to the circuit of the drive motor M of the fuel pump P, as shown in FIG.

In addition, 65 is a stopper provided on the body 1 side, and in FIG. 3, N is a neon lamp indicating the operation of the limit switch.

Next, to explain the operation and effect, the safety device for the burner for generating hot air in the grain dryer according to the present invention configured as described above is designed to prevent fuel from spilling out from the overflow port 33 of the combustion dish 31 of the pot burner a. As oil gradually accumulates in the saucer 6, the saucer 6
When the weight on the side of the balance 7 is balanced with the weight W and the weight W side of the balance 7 floats up and repeatedly swings, when the side of the balance 7 on the tray 6 tilts downward, as shown in Fig. 2. As shown, the ball-shaped balance weight 71 inserted into the lever rod 70 formed in the pipe rolls over the fulcrum Y to the side of the tray 6, and as a result, the balance 7 Since the weight on the side of the saucer 6 is increased, the side of the saucer 6 that has been lowered will not rise again and repeat rocking, and when the specified amount of fuel oil has accumulated in the saucer 6, the switch S can be turned on without fail. This eliminates the inconvenience of repeatedly turning on and off. And this means
It is only necessary to form the lever rod 70 of the balance 7 that supports the tray 6 from a pipe material and insert a ball-shaped balance weight 71 inside it, so the structure is not complicated and can be easily constructed. It can be implemented with a flexible structure.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an embodiment of the device of the present invention, FIG. 2 is an explanatory diagram of the operation of the same device, and FIG. 3 is an electric circuit diagram. Explanation of drawing symbols, A... Grain dryer, a... Pot burner, 1... Aircraft, 10... Grain tank, 2
...Air guide path, 20...Intake port, d...Interval, f...
...Blower, 3...Body, 30...Heating element, 31
... Combustion dish, 32 ... Fuel supply pipe, 33 ...
Overflow port, 34...Drain pipe, 4...Combustion tube,
40...flange, 41...reflector, 42...spout, 5...funnel, 50...discharge port, 6...saucer, 60...socket, 65...stopper, 7...
... Balance, 70 ... Lever rod, 71 ... Balance weight, P ... Fuel pump, Y ... Fulcrum, W ... Weight, S ... Switch, M ... Drive motor, N ...
...Neon lamp.

Claims (1)

[Scope of utility model registration request] A funnel 5 is provided below the combustion dish 31 of the pot-type burner a to collect the fuel oil dripping from the overflow port 33 of the combustion dish 31, and is swingable about a fulcrum Y below the discharge port 50 of the funnel 5. A support tray 6 is disposed at one end of the balance 7, and the balance 7 has a lever 70 formed in the form of a pipe, and a ball-shaped balance weight 71 is inserted into the inner cavity of the lever so that it can roll freely. A safety device for a burner for generating hot air in a grain dryer, characterized in that a balance 7 is connected to a switch S for controlling on/off the drive power of a fuel pump P.