JPH0215838Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a liquid sealing device for a storage container for storing materials that deteriorate due to oxidation, such as asphalt mixture for paving.

[Conventional technology]

When asphalt mixture for paving is stored in a container such as a silo for a long time, the asphalt tends to oxidize and deteriorate when exposed to air. In order to prevent this deterioration, methods have been adopted, such as expelling the air inside the container and filling it with inert gas, or deoxidizing the air inside the container. In order to store such items that must be isolated from the outside air, not only the container body but also the discharge gate must have a sealed structure.

An example of a structure for making the discharge gate of the container body airtight is disclosed in Japanese Utility Model Publication No. 58-27997. In the sealed structure shown in the publication, a seal box is attached surrounding the discharge gate of the storage body, and the seal gate is provided to be swingable around a fulcrum provided at the opening of the seal box. A sealing liquid reservoir and tank are provided at the gate. With this structure, when the discharge gate is closed by the seal gate, the liquid in the liquid reservoir of the seal gate closes the discharge gate. Further, when the discharge gate is tilted and opened, the liquid in the liquid reservoir flows into the tank.

This conventional structure requires the seal gate to be swingably attached to the seal box. For this reason, it is difficult to clean the inside of the seal gate, and the drive mechanism becomes complicated.

To solve this problem, a sealing device for a heated asphalt mixture storage tank is disclosed in Japanese Patent Application Laid-Open No. 55-64092, in which the seal gate and its drive mechanism are configured separately and independently from the silo discharge gate. There is. This includes a lifting mechanism for raising and lowering the sealing lid that seals the discharge port at the bottom of the tank, and a lateral movement mechanism for retracting the sealing lid from the bottom of the discharge port.

[Problem that the invention attempts to solve]

However, in the device described in JP-A-55-64092, the lifting mechanism and the lateral movement mechanism are provided independently for opening and closing the sealing lid, resulting in a complicated structure and the need for both mechanisms. There was a problem in that the control was complicated because there was a sequence of drives.

Therefore, an object of the present invention is to simplify the driving mechanism of the seal gate that seals the outlet of the storage container.

[Means for solving problems]

In order to achieve this purpose, the liquid sealing device for an airtight storage container of the present invention includes a sealing gate that closes the open end of the outlet hood surrounding the outlet gate provided at the outlet of the storage container with a sealing liquid. A guide rail is provided below the discharge port hood and has a raised inclined step so as to approach the discharge port hood, and the base end is rotatably fixed on the extension of the guide rail. The rod tip of the cylinder for advancing and retracting the seal gate is fixed to the seal gate.

〔Example〕

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings.

FIG. 1 shows a state in which the discharge gate is closed in an embodiment of the present invention, and FIG. 2 shows a side cross section thereof. Moreover, FIG. 3 shows a state in which the discharge gate is opened.

In the figure, 1 is a silo main body in which an asphalt mixture for paving is housed. A discharge gate 3 is provided at the lower end opening 1a of the silo body 1, and is driven to open and close by an air cylinder 2 (see FIG. 2).
is attached to the shaft 4 so as to be openable and closable. The vicinity of the opening 1a and the entire discharge gate 3 are covered by a discharge port hood 5 whose lower end is open only.

A guide rail 6 is provided below the outlet hood 5. Then, the guide rail 6
At two locations below the discharge outlet hood 5, there is a raised raised section 6A with an inclined step.
6B is provided. A seal gate 8 is disposed on the guide rail 6 so as to be movable horizontally. The seal gate 8 is driven by the expansion and contraction of a rod of a power cylinder 7 whose base end is rotatably fixed. In addition, 9 and 10 are this seal gate 8
wheels.

In the liquid seal gate device having such a structure, when the discharge gate 3 shown in FIG. 1 is closed, the open end of the hood 5 is closed by the sealing liquid stored in the seal gate 8. As a result, the inside of the silo body 1 is isolated from the outside air, and the asphalt mixture stored in the silo body 1 is prevented from oxidation and deterioration.

On the other hand, when opening the discharge gate 3, the power cylinder 7 is pulled to lower the seal gate 8 along the run-on portions 6A and 6B. As a result, the sealing liquid moves away from the open end of the hood 5 and also moves in the horizontal direction, retreating to the retracted position shown in FIG. 3. In this state, the discharge gate 3 is opened and the asphalt mixture is discharged from the silo body 1.

In this retracted position of the seal gate 8, the upper surface of the seal gate 8 is kept open as shown in FIG. 3, so that the interior of the seal gate 8 can be easily cleaned.

In addition, the number 11 in FIGS. 1 and 3 is
A float level gauge is shown. When the sealing liquid in the sealing gate 8 becomes low and falls below a set level, the float type liquid level gauge 11 is activated and the sealing liquid stored in the sealing liquid tank 12 is sealed via the replenishment pipe 13. Replenish inside gate 8. Thereby, the sealing liquid in the seal gate 8 is always maintained at a constant level.

[Effect of idea]

As described above, according to the present invention, when closing the discharge gate of the container body, the seal gate is raised near the discharge gate, and the sealing liquid in the seal gate seals the open end of the discharge port hood. Therefore, the structure is simpler than the conventional swing type seal device, and the top surface of the seal gate is open when the seal gate is retracted, making it easy to clean the inside of the seal gate. can. Furthermore, since a stepped guide rail is provided and the seal gate is driven by a single cylinder, the seal gate can be moved laterally and raised and lowered simply by extending and contracting the cylinder, simplifying the structure and making control easier. , it is also advantageous in terms of cost.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of the discharge gate in a closed state in an embodiment of the present invention, Fig. 2 is a side sectional view thereof, and Fig. 3 is a side sectional view thereof.
The figure is a front sectional view of the discharge gate in an open state. 1: Silo body, 2: Air cylinder, 3: Discharge gate, 4: Shaft, 5: Discharge port hood, 6: Guide rail, 6A, 6B: Riding part, 7: Power cylinder, 8: Seal gate, 9, 10 :wheel, 1
1: Float type liquid level gauge, 12: Seal liquid tank,
13: Refill pipe.

Claims (1)

[Scope of utility model registration request] A sealing gate is provided that closes the open end of a discharge port hood surrounding a discharge gate provided at the discharge port of the storage container with a sealing liquid, and the seal gate is raised below the discharge port hood so as to approach the discharge port hood. A guide rail having a sloped step is disposed, and the base end is rotatably fixed on the extension of the guide rail, and the rod tip of a cylinder for advancing and retreating the seal gate is fixed to the seal gate. Liquid sealing device for closed storage containers.