JPH08312934A - Pit door for waste pit - Google Patents

Abstract

PURPOSE: To improve the sealability of a pit door for a waste pit, in the closed state of them. CONSTITUTION: A pit door 1 and a pit door 2 each are turned around shafts. Tubular sealing members 10 made of urethane rubber each are fixed on the surfaces where the doors are joined together. An air pipe line 16 is connected to the top end of each of the sealing members 10, and is connected to an air tank 14 through a three-way valve 12 and a stop valve 13 which are electrically driven. A limit switch 11 is attached to the door, in order that the closure thereof is detected and that a closing signal is outputted therefrom, and a signal line is wired to a control panel 15. When the doors are completely closed, a gas is filled into the hollow parts of the sealing members 10, so that the sealing members 10 are expended. In this way, high sealability on the contact surfaces of the doors can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading door installed in a refuse pit of a refuse incineration facility, and more particularly to a loading door of a dust pit suitable for completely blocking odors in the garbage pit.

[0002]

2. Description of the Related Art FIG. 6 is a plan view showing a conventional dust input door. As shown in the figure, the conventional waste input door is a double door, 1 is one waste input door, 2 is the other waste input door,
3 is a shaft of the dust input door 1, 4 is a shaft of the dust input door 2, and 20 is a sealing material. Both dust input doors 1 and 2 are opened and closed by a link mechanism composed of a hydraulic cylinder (not shown) connected to shafts 3 and 4 and a connecting rod.

FIG. 7 is a cross-sectional view showing a conventional sealing material. This figure is an enlarged view of part C in Fig. 6.
If there is a gap in the contact surface between the dust input door 2 and the dust input door 2, the odor inside the pit leaks out, so attach the sealing material 20 to the contact surface as shown in this figure, and close the dust input door 1 and the dust input door 2. When the sealing material 20 is deformed, the sealing material 20 is deformed by about 5 mm to maintain the adhesiveness.

[0004]

However, when the sealing material according to the prior art described above is distorted due to a manufacturing error of the dust input door or when the shafts 3 and 4 are not perpendicular to each other due to an installation error, the dust input door Closed, there will be a V-shaped gap between the sealing materials 20 on the contact surface of the closing door,
The sealing material 20 deteriorates due to the opening / closing operation for a long period of time, loses its elasticity, and its adhesion decreases. Only deformation within the elastic limit of the material, for example, deformation within 5 mm can be expected, and high adhesion cannot be obtained if there is a large gap due to manufacturing error or installation error of the dust input door. An object of the present invention is to improve the adhesiveness of the dust pit when the closing door is closed.

[0005]

[Means for Solving the Problems] The above-mentioned object is to open and close the dust input door of the dust pit which is opened by rotating from the closed position, the sealing material arranged at the circumferential end of the dust input door, and the dust input door by rotating. In a dust pit loading door having a dust loading door opening / closing means, the sealing material is a hollow elastic body,
A gas source that supplies pressurized gas to a hollow elastic body, a control valve that is placed between the gas source and the hollow elastic body, a dust entrance door open / close detection unit that detects the fully closed state of the dust entrance door, and a dust entrance This can be achieved by providing a control device that outputs an open signal to the control valve in response to the fully closed state detection signal from the door open / close detection means.

[0006] The above-mentioned object is to put in both of the dust input doors of the dust pit which is opened by rotating from the closed position, the sealing material arranged on the contact surfaces of both the dust input doors, and the dust input which rotates and opens and closes the dust input doors. In a dust pit insertion door having a door opening / closing means, a sealing material is made of a hollow airtight elastic body, and a gas source for supplying a pressurized gas to the hollow airtight elastic body, and between the gas source and the hollow airtight elastic body. The installed control valve, the dust opening door open / close detection unit that detects the fully closed state of the dust loading door, and the control device that outputs an open signal to the control valve by the fully closed state detection signal from the dust loading door open / close detection unit. This can be achieved by providing it.

[0007]

According to the above construction, when the dust-in door is fully closed, gas is injected into the hollow inside of the sealing material to expand the sealing material, so that the amount of deformation of the sealing material becomes larger than that in the conventional case and the contact surface is higher. Adhesion can be obtained. Further, by changing the pressure of the gas injected into the sealing material, it is possible to deal with various degrees of gaps in the dust input door, and the surface pressure and area of the sealing material contact surface can be freely set.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view showing a dust input door according to an embodiment of the present invention. FIG. 2 is a plan view showing the dust input door of the embodiment of the present invention. FIG. 2 is a view showing a cross section taken along the line AA of FIG. 1 and a control system for air injection. As shown in FIGS. 1 and 2, 1 is one dust input door, 2 is the other dust input door, and 3 is The axis of the dust input door 1, the axis of the dust input door 2, 9 the sealing plate, 10 the sealing material, 11 the limit switch, 12 the three-way valve, 13 the main valve, 14 the air tank, 15 the control panel, Reference numeral 16 is an air pipe.

FIG. 3 is a cross-sectional view showing a sealing material according to an embodiment of the present invention. The dust input door 1 and the dust input door 2 are rotated by the shaft 3 and the shaft 4. A seal plate 9 is attached around the opening wall of the dust input port and the input door, and when the dust input door 1 and the dust input door 2 are fully closed, the periphery is sealed by the seal plate 9. With respect to the adhesion, a slight manufacturing error or installation error is allowed due to the surface contact between the dust input door 1 and the dust input door 2 and the seal plate 9, and there is no effect as much as the contact surface of the dust input door which is a line contact. This figure is an enlarged view of the portion C of FIG. 2, and a tubular sealing material 10 made of urethane rubber is attached to the mating surface of the dust input door. An air pipe 16 is connected to the upper end of the sealing material 10, and is connected to an air tank 14 via a three-way valve 12 and an original valve 13 which are electrically operated. The limit switch 11 is attached so as to detect the fully closed state of the dust input door and output a fully closed signal, and a signal line is wired to the control panel 15.

FIG. 4 is an explanatory view showing the link mechanism of the embodiment of the present invention. This drawing is a sectional view taken along the line BB in FIG. 1. As shown in the drawing, 5 is a connecting rod, 6 is a bearing, 7 is a bearing, and 8 is a hydraulic cylinder. The shafts 3 and 4 of the dust throwing door 1 and the dust throwing door 2 are supported by bearings 6 and 7, respectively.
A link mechanism is configured by a connecting rod 5 that connects the connecting rod 5 and a hydraulic cylinder 8 that drives the connecting rod 5. The hydraulic cylinder 8 is fixed to the opening wall of the dust input port, and when the piston of the hydraulic cylinder 8 contracts, the shaft 3 rotates counterclockwise and the shaft 4 rotates.
Turns to the right, so the dust input door 1 and the dust input door 2 open to the dust pit side. On the contrary, when the piston of the hydraulic cylinder 8 extends, the dust input door 1 and the dust input door 2 are closed. After putting the garbage collected by the garbage truck into the garbage pit, hydraulic cylinder 8
When the dust throwing door 1 and the dust throwing door 2 are fully closed by extending the limit switch 11, the limit switch 11 detects the full closing and a full closing signal is sent to the control panel 15, and the control panel 15 opens the original valve 13 and the three-way valve 12 To connect the air tank 14 and the sealing material 10,
Air is injected from the air tank 14 into the inside of the sealing material 10 through the air pipe 16.

FIG. 5 is a transverse cross-sectional view showing the close contact state of the sealing material of the embodiment of the present invention. When air is injected, the sealing material 10 expands and adheres well to each other as shown in the figure, so that the odor in the dust pit is blocked. When the dust input door is opened, the sealing material 10 is communicated with the atmosphere in advance by the switching signal of the three-way valve 12 from the control panel 15, and the air inside the seal material 10 is discharged to the atmosphere before the dust input door 1 and the dust input door. Open the closing door 2.

In this embodiment, the degree of expansion of the sealing material can be controlled by adjusting the opening time of the three-way valve 12 and changing the pressure of the air injected into the sealing material. It is possible to maintain high adhesiveness in accordance with the change in elasticity due to deterioration of the sealing material. Further, since the surface pressure and area of the sealing material contact surface can be freely set, the degree of freedom in designing the sealing mechanism is increased. Although air is used as the gas for expanding the sealing material in this embodiment, the same effect can be obtained by using a gas other than air, such as nitrogen or carbon dioxide.

As described above, according to the present embodiment, since a sealing material having a hollow inside is used and air is injected into the inside to expand the sealing material to bring the sealing material into close contact, a gap due to an installation error of the dust throwing door or Since there is no gap between the sealing materials due to aging, the adhesion of the mating surfaces of the doors is always maintained.

[0014]

According to the present invention, when the dust input door is fully closed, gas is injected into the hollow portion of the sealing material to expand the sealing material, so that high adhesion can be obtained on the contact surface. In addition, by changing the pressure of the gas injected into the sealing material, it is possible to cope with various levels of gaps in the dust input door.

[Brief description of drawings]

FIG. 1 is a front view showing a dust input door according to an embodiment of the present invention.

FIG. 2 is a plan view showing a dust input door according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a sealing material according to an embodiment of the present invention.

FIG. 4 is an explanatory view showing the link mechanism of the embodiment of the present invention.

FIG. 5 is a transverse cross-sectional view showing a sealing state of the sealing material according to the embodiment of the present invention.

FIG. 6 is a plan view showing a conventional dust input door.

FIG. 7 is a cross-sectional view showing a conventional sealing material.

[Explanation of symbols]

 1 Waste input door 2 Waste input door 3 Waste input door axis 4 Waste input door axis 5 Connecting rod 6 Bearing 7 Bearing 8 Hydraulic cylinder 9 Seal plate 10 Seal material 11 Limit switch 12 Three-way valve 13 Main valve 14 Air tank 15 Control panel 16 Air piping 20 Sealant

Claims (2)

[Claims] 1. A dust input door of a dust pit that rotates from a closed position to open, a sealing material arranged at a tip end in the circumferential direction of the dust input door, and a dust input door opening / closing means for rotating and opening the dust input door. And a gas source for supplying a pressurized gas to the hollow elastic body, and the sealing material is disposed between the gas source and the hollow elastic body. A control valve, a dust throwing door open / close detecting means for detecting a fully closed state of the dust throwing door, and a control device for outputting an open signal to the control valve in response to a fully closed state detecting signal from the dust throwing door open / close detecting means. The entry door of the garbage pit, which is characterized by the provision of. 2. Garbage input doors for both of the dust pits that rotate from the closed position to open, a sealing material arranged on the contact surfaces of both the dust input doors, and a dust input for rotating and opening and closing the dust input doors. In a dust pit insertion door having a door opening / closing means, the sealing material is made of a hollow airtight elastic body, a gas source for supplying a pressurized gas to the hollow airtight elastic body, and the gas source and the hollow airtightness A control valve arranged between the elastic bodies, and a dust entrance door open / close detection means for detecting the fully closed state of the waste entrance door,
A refuse pit loading door provided with a control device for outputting an open signal to the control valve in response to a fully closed state detection signal from the dust loading door opening / closing detection means.