JPH0423923B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a storage container for storing an asphalt mixture (a mixture of asphalt and aggregates such as crushed stone and sand) used for road paving materials, for example. More specifically, the present invention relates to an airtight opening/closing device for openings of both or one of an outlet and an inlet of the storage container.

(Prior Art) In order to store the asphalt mixture described above, it is necessary to maintain it at a high temperature to prevent it from solidifying, and to cut off contact with air to prevent deterioration due to oxidation. Regarding the former, a method generally used is to provide a heating pipe or the like around the container to maintain the temperature at a constant higher temperature than the surroundings of the container. Regarding the latter, oxidation is prevented by constantly filling the container with an inert gas or the like.

By the way, in the case of this type of storage container, as shown in FIG.
The asphalt mixture is transported to the input port 32 at the upper end of the storage container 1 by a transport device such as
The asphalt mixture in the storage container 1 is poured into the storage container 1 and stored, while the asphalt mixture in the storage container 1 is discharged through the discharge port 2 at the lower end.
In order to prevent leakage of the inert gas and to prevent outside air from entering the container, the opening/closing devices for the inlet port 32 and the outlet port 2 must be extremely airtight. .

Therefore, to explain a conventional example, as shown in FIG.
A structure is generally implemented in which an opening/closing lid 34 with one end pivoted is attached, and the packing 33 maintains airtightness.
In addition to the structure using a packing mechanism similar to the inlet 32, as shown in FIG. A structure has been implemented in which the interior is filled with oil 36 to cut off contact with the outside air.

(Problems to be Solved by the Invention) In the case of the conventional opening/closing device described above, the asphalt mixture adheres to the packing, resulting in poor adhesion between the opening/closing lid and the packing.
There is a risk that inert gas may leak from inside the container, or that outside air may enter the container and come into contact with the asphalt mixture and cause oxidation. , it is necessary to repeat the oil draining and filling operations each time the lid is opened and closed, which is a complicated and time-consuming process.Furthermore, the asphalt mixture near the discharge port deteriorates when it comes into contact with oil, so it must be discarded. This had the disadvantage of being wasteful and uneconomical.

This invention was made in view of the above points, and it is possible to reliably block the contact between the asphalt mixture in the storage container and the outside air, and there is no contact between the asphalt mixture and liquid substances such as oil as in the conventional case. The present invention aims to provide a switchgear with extremely high airtightness without the need to dispose of part of the asphalt mixture.

(Means for solving the problem) This invention for achieving the above-mentioned purpose (first
The gist of the invention is as follows: (a) an opening/closing device for a discharge or input opening of a storage container for asphalt mixture, etc.; (c) a circular movable plate rotatably arranged with respect to the fixed plate and having an opening corresponding to the opening; (d) between the movable plate and the fixed plate; (e) a liquid storage groove with an open top formed along the outer periphery of the lower side; an annular frame piece that can be partially inserted into a liquid substance to form a liquid seal between the fixed platen and the outer peripheral edge of the movable plate; and (f) misalignment between the opening of the container body and the opening of the movable platen. , (g) a lid body separably disposed with respect to the opening of the movable platen in a closed position of the movable platen where both openings are mutually closed; and (g) an outer peripheral edge of the lid body and the movable platen; (h) a liquid storage groove with an open top formed along the lower opening of the movable platen and an outer peripheral edge of the lid that projects downwardly along the upper side; an annular frame piece that can be partially inserted loosely into the liquid material in the storage groove to seal a liquid seal between the outer peripheral edge of the lid body and the opening of the movable plate; (i) an opening of the container body; a drive device for moving the movable plate between an open position where the opening of the movable plate coincides with the closed position; and (j) separating the lid from the opening of the movable plate. It is equipped with a drive device to do this.

A second invention also provides (A) an opening/closing device for a discharge or input opening of a storage container for an asphalt mixture, and (B) a rectangular opening connected integrally around the opening of the container body. a fixed plate; (C) a rectangular movable plate that is slidably arranged relative to the fixed plate and has an opening corresponding to the opening; and (D) an outer peripheral edge of the movable plate and an outer peripheral edge of the fixed plate. and (E) straddling the liquid in the liquid storage groove of the fixed plate and the liquid in the liquid storage groove of the movable plate. (F) an annular frame member that is capable of sealing a liquid between the outer peripheral edges of the fixed plate and the movable plate by loosely inserting a part of the frame member, and that is movable upward from both liquid storage grooves; (G) a lid body that is separably arranged with respect to the opening of the movable platen in a closed position of the movable platen in which the position with the opening of the movable platen is shifted and both openings are mutually closed; (H) an open top liquid storage groove formed along the outer peripheral edge of the lid and the opening on the lower side of the movable plate; an annular frame piece that protrudes downward along the upper side of the frame piece and can be partially inserted loosely into the liquid material in the storage groove to form a liquid seal between the outer peripheral edge of the lid body and the opening of the movable platen; and (I) for the liquid storage groove of the fixed plate and the liquid storage groove of the movable plate,
a drive device for vertically moving the annular frame member; (J) moving the movable platen between an open position where the opening of the container body and the opening of the movable plate coincide with the closed position; a drive device for causing the
(K) A driving device for separating the lid from the opening of the movable platen is provided.

(Function) According to the switchgear of this invention (first invention),
With the opening of the container body (discharge port or input port) and the opening of the movable plate completely shifted and both openings closed, liquid is poured between the opening on the movable plate side and the outer peripheral edge of the lid. The liquid is sealed through the liquid in the liquid storage groove, and the lower end of the annular frame is inserted into the liquid in the liquid storage groove on the outer periphery of the movable plate or fixed plate, and the outer peripheral edge of the fixed plate and the movable plate are sealed. By sealing the area between the outer peripheries of the panel, the inside of the container body is completely isolated from the outside air, and the movable panel can be rotated relative to the fixed panel by separating the lid from the opening of the movable panel. By rotating the opening of the movable plate so that it coincides with the opening of the container body, both openings will be in communication and the stored material in the container can be discharged or stored in the container. It is possible to input stored materials, and also,
It is also possible to adjust the discharge amount of the stored material by slightly shifting the position of the opening of the movable platen with respect to the opening (discharge port) of the container body.

Further, according to the opening/closing device according to the second aspect of the invention, by sliding the movable platen, the opening of the container body can be opened and closed similarly to the opening/closing device of the first aspect. However, when sliding the movable plate,
It is necessary to pull up the annular frame member that seals the space between the outer peripheral edge of the fixed platen and the outer peripheral edge of the movable platen. However, other functions are common to the opening/closing device of the first invention.

(Example) Hereinafter, an example in which the opening/closing device of the present invention is used for a discharge port will be described based on the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a silo-type storage container body, and a cylindrical discharge port 2 is provided at the lower end of the container body 1. As shown in FIG. 3 is a circular fixed plate, and this fixed plate 3 is integrally arranged around the discharge port 2. Furthermore, an annular frame piece 4 is provided on the outer peripheral edge of the fixed platen 3 to protrude downward.

Reference numeral 5 denotes a rotary plate as a movable plate. The rotary plate 5 is a circular plate having substantially the same shape as the fixed plate 3, and is arranged in an overlapping state so as to be rotatable concentrically with respect to the lower surface of the fixed plate 3. Further, an annular liquid storage groove 6 with an open upper end is integrally formed on the outer peripheral edge of the rotary disk 5, and the storage groove 6 is filled with a highly viscous sealing liquid such as grease 7. The lower end of the annular frame piece 4 on the stationary platen 3 side is inserted into the grease 7 in the storage groove 6.

Reference numeral 8 denotes a drive device for rotating the rotary disk 5, which includes a drive shaft 8a projecting downward from the center of the rotary disk 5, a worm wheel 8b fixed to the lower end of the drive shaft 8a, and a worm wheel. It consists of a worm gear 8c that meshes with the worm gear 8b, and a drive motor 8d connected to the worm gear 8c, and the rotary disk 5 is rotated by the rotation of the drive motor 8d.

Reference numeral 9 denotes an opening provided in the rotary disk 5, and this opening 9 is arranged at a position corresponding to the discharge port 2. In other words, by rotating the rotary disk 5 relative to the fixed plate 3, the discharge port 2 and the opening 9 may align and communicate with each other, or the positions of the discharge port 2 and the opening 9 may be completely shifted. The opening positions are set so that both openings 2 and 9 are mutually closed. Further, around the opening 9, an annular frame piece 10 is provided to protrude downward.

Reference numeral 11 denotes a lid body, which is detachably disposed at the opening 9 of the rotary disk 5 in the closed position via a drive device such as a hydraulic cylinder 12. In addition, the lid body 11
An annular liquid storage groove 13 with an open upper end into which the annular frame piece 10 of the opening 9 can be loosely inserted is integrally formed around the storage groove 13. It is filled with liquid.

By the way, the opening/closing device of the above-described embodiment is installed at the outlet at the lower end of the storage container, but it can also be installed at the input port at the upper end of the storage container. The annular frame piece 4
is formed on the outer periphery of the rotary plate 5, a liquid storage groove 6 is formed on the outer periphery of the fixed plate 3, and further, the annular frame piece 1
The difference is that each constituent member is upside down, such as that 0 is provided protruding downward from the outer periphery of the lid 11, and the liquid storage groove 13 is formed around the opening 9 of the rotary disk 5. However, basically there is no change, so
Illustrations and detailed descriptions will be omitted.

Next, another embodiment of the present invention will be described. In the above embodiment, the movable plate 5 is of a rotating type, but it can also be of a sliding type. That is, as shown in FIG. 5, at the discharge port 2 at the lower end of the container body 1, the fixed platen 3 and the movable platen 5 on the lower side thereof are each formed into a rectangular shape, and the movable platen 5 is arranged in a rectangular shape with respect to the fixed platen 3. It is arranged to be slidable in the longitudinal direction and is moved by a drive device. Further, liquid storage grooves 6a and 6b filled with grease etc. are provided around the fixed platen 3 and the movable platen 5, and both the liquid storage grooves 6a and 6 are provided.
An annular frame member 4' corresponding to the annular frame piece 4 is provided, which can be inserted across the grease 7 in b. However, the annular frame member 4' is inserted into the grease 7 only when the discharge port 2 is closed, and at other times, the annular frame member 4' is inserted into the grease 7 to enable the movement of the movable platen 5. It is necessary to be able to pull it upward from both storage grooves 6a and 6b, that is, to be able to move it up and down via a drive device (not shown). The other configurations are the same as those of the previous embodiment, and the functions are also the same, so detailed explanations will be omitted.

It goes without saying that the present invention can be applied not only to the outlet 2 of the container body 1 but also to the inlet.

(Effects of the Invention) As explained above, since the opening/closing device of the present invention has the above-described configuration, it has the following effects.

(1) When the opening of the storage container is closed, the opening is closed by the movable platen, and the space between the outer circumferential edge of the fixed platen and the outer circumferential edge of the movable platen, and between the opening on the movable platen side and the outer circumferential edge of the lid body. The asphalt mixture inside the storage container is sealed with a liquid substance such as grease, and the inside of the container is completely isolated from the outside air, making it extremely airtight. It is possible to reliably cut off contact with the outside air and allow stable storage for long periods of time without deterioration.

(2) During storage, there is no contact between the asphalt mixture and liquid materials such as oil, unlike in conventional methods.
It is economical because there is no waste such as discarding a part of the asphalt mixture.

(3) As shown in the example, when this opening/closing device is installed at the discharge port at the lower end of the storage container main body, by appropriately shifting the position of the opening of the movable platen with respect to the discharge port, the stored material can be discharged. It is convenient because the amount can be adjusted and it can also be used as a discharge amount adjustment device.

(4) All opening and closing operations can be performed automatically via the drive device, eliminating the need for manual labor and reducing the burden on the operator.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along the line -- in FIG. 2 showing a drive device according to an embodiment of the present invention, and FIG.
3 is a partially cut away perspective view of the same section, FIG. 4 is a schematic front view showing a conventional general opening/closing device for a storage container, and FIG. 5 is according to the second invention. FIG. 2 is a partially cutaway perspective view showing an embodiment of the opening/closing device; 1... Storage container main body, 2... Outlet, 3... Fixed plate,
4... Annular frame piece, 4'... Annular frame member, 5... Movable plate,
6, 6a, 6b, 13...Liquid storage groove, 7, 14
... Grease, 8, 12... Drive device, 9... Opening, 1
1... Lid body.

Claims (1)

[Scope of Claims] 1. An opening/closing device for a discharge or input opening of a storage container for asphalt mixture, etc., comprising: a circular fixed plate integrally connected around the opening of the container body; and the fixed plate. a circular movable plate that is rotatably arranged relative to the plate and has an opening corresponding to the opening; and an open upper part formed along the outer periphery of the lower side of the movable plate and the fixed plate. A liquid storage groove, which is provided to protrude downward along the outer periphery of the upper side of the fixed platen and the movable platen, and a part of the groove is loosely inserted into the liquid substance in the storage groove to remove the liquid from the fixed platen and the movable platen. an annular fragment capable of liquid sealing between the peripheral edges thereof; and a closed position of the movable platen in which the opening of the container body and the opening of the movable platen are misaligned and both openings are mutually closed; a lid detachably disposed on the movable plate; a liquid storage groove with an open top formed along the outer peripheral edge of the lid and a lower opening of the movable plate; The opening of the disk and the outer peripheral edge of the lid body are provided so as to protrude downward along the upper side, and a portion thereof is loosely inserted into the liquid material in the storage groove to separate the outer peripheral edge of the lid body and the movable platen. an annular frame piece capable of liquid sealing between the openings of the container body; and a drive device for moving the movable platen between an open position where the opening of the container body and the opening of the movable platen coincide with the closed position. An airtight opening/closing device for a storage container, comprising: a drive device for separating the lid from the opening of the movable platen. 2. An opening/closing device for the discharge or input opening of a storage container for asphalt mixture, etc., comprising: a rectangular fixed plate that is integrally connected around the opening of the container body; and a rectangular fixed plate that is slidable with respect to the fixed plate. a rectangular movable plate which is arranged and has an opening corresponding to the opening; a liquid storage groove with an open top formed along the outer periphery of the movable plate and the outer periphery of the fixed plate; A part of the plate is loosely inserted across the liquid in the liquid storage groove of the fixed plate and the liquid in the liquid storage groove of the movable plate to form a liquid seal between the outer peripheral edges of the fixed plate and the movable plate. an annular frame member that is movable upward from both liquid storage grooves; and a movable platen in which the opening of the container body and the opening of the movable platen are misaligned and both openings are mutually closed. In the closed position, a lid body is separably arranged with respect to the opening of the movable plate; and an upper opening formed along the outer peripheral edge of the lid body and the opening on the lower side of the movable platen. A liquid storage groove, which is provided to protrude downward along the upper side of the opening of the movable platen and the outer peripheral edge of the lid body, and a part of the groove is loosely inserted into the liquid substance in the storage groove to remove the lid body. an annular frame piece capable of sealing liquid between the outer peripheral edge of the movable plate and the opening of the movable plate; a drive device for moving the movable platen between an open position where the opening of the container body and an opening of the movable platen coincide with the closed position, and a drive device for moving the movable platen between the closed position and the opening position of the movable platen An airtight opening/closing device for a storage container, comprising: a drive device for separating the lid from the opening of the storage container.