JP4833874B2 - Discharge hatch - Google Patents

Description

  The present invention relates to a discharge hatch for an on-vehicle tank of a bulk vehicle for transporting powder, on which edible powder such as milled flour is loaded and transported.

  When transporting bulk powders, for example, edible powders such as milled flour (hereinafter described as an example of wheat flour) from a mill to a customer's processing factory such as a bread factory, Has packed the flour in a 25kg-packed bag, etc., and then transported the bagged flour by truck, etc., but in recent years, mainly for customers who purchase large quantities, without bagging Increasingly, the flour is loaded and loaded into an on-board tank of a tank truck while being in bulk form, and the flour loaded on the on-board tank is transported. A tank truck that transports such bulk powder is referred to as a bulk vehicle.

  This bulk car transport allows you to transport the flour without bagging and deliver it directly to the silo (storage tank) of the customer's processing plant. In recent years, this method of transportation has been widely used because it can be transported and the bagging process at the milling factory and the removal work from the bag at the customer's processing factory are no longer necessary. It has been.

  The bulk car for transporting the bulk flour is, for example, a bulk car 130 as shown in FIG. 7, and the flour is loaded on the in-vehicle tank 132 of the bulk car 130 and transported. In this figure, both the method of putting flour into the in-vehicle tank 132 of the bulk car 130 at the mill and the method of discharging flour at the customer's factory are drawn at the same time. That is, when flour is put into the bulk car 130 at the mill, for example, the flour milled at the mill is conveyed to the second floor as a loading place, and the bellows is placed on the on-vehicle tank 132 of the bulk car 130 parked on the first floor. It is naturally dropped through the transfer tube 134 and is loaded into the in-vehicle tank 132 of the bulk car 130 for loading.

In the loading of the flour, the flour is fed from the two feeding hatches 136 on the front side and the rear side provided on the upper surface of the in-vehicle tank 132 of the bulk car 130 by, for example, two bellows-shaped transfer tubes 134. The air is vented from the central input hatch 136. Without being limited to this example, any of the input hatches 136 may be used as appropriate for the input and ventilation of the flour. In addition, when the flour is discharged into the silo at the customer's factory, it is discharged from the discharge port 138 of the discharge hatch 137 and is transported to the silo by pneumatic transport through the transport tube 140. At this time, a hydraulic cylinder (not shown) pushes up the front part of the on-vehicle tank 132 to tilt the on-vehicle tank 132, and drives a compressor mounted on the bulk vehicle 130 or a compressor (not shown) installed at a customer factory. The compressed air generated is introduced into the upper front end of the in-vehicle tank 132 to pressurize the inside of the tank, and air is blown out from a fluid plate arranged inside the discharge hatch 137 to fluidize the flour inside the discharge hatch. And discharged from the discharge port 138 (see Patent Document 1).
JP 2004-99147 A

  By the way, the flour loaded in the in-vehicle tank 132 adheres to the inside of the discharge hatch, that is, the fluidized plate arranged inside the discharge hatch, but the conventional discharge hatch 137 has a discharge hatch as shown in FIG. The short tubular opening 152a of the fluid plate 152 is fitted into the exhaust port 150a formed in the outer wall 150 of the exhaust hatch without any gap through the O-ring 154. For this reason, it is extremely difficult to remove the fluidized plate 152 from the outer wall 150 of the discharge hatch, and a great deal of labor is required to clean the attached flour.

  An object of the present invention is to provide a discharge hatch that is easy to disassemble and clean.

  The discharge hatch according to the present invention is a discharge hatch provided at the rear lower part of an on-vehicle tank mounted on a bulk vehicle for powder transportation, and has a truncated cone-shaped space inside, and a discharge port at the top of the space. An outer wall having a predetermined gap with the outer wall, and an air flowable fluid plate having an opening corresponding to the outlet, and when the powder is discharged from the outlet, the outer wall In the discharge hatch, the air supplied to the gap between the fluid plate and the fluid plate is ejected through the fluid plate, and the powder staying in the vicinity of the fluid plate is fluidized and discharged from the discharge port. Has a contact surface on the peripheral edge of the discharge port of the inner wall, and the fluid plate is formed on the peripheral edge of the opening on the outer wall side and the peripheral edge of the opening. A small flange and a large flange formed at the opening end opposite to the opening. A plurality of longitudinal ribs arranged at predetermined intervals on the frustoconical outer wall of the fluidized plate connecting the lunge portion, the small flange portion and the large flange portion; and a plurality of concentric ribs intersecting the longitudinal rib The contact portion of the fluid plate is brought into contact with the contact surface of the outer wall via an O-ring, and the outer wall and the fluid plate are fastened by a plurality of fasteners. It is characterized by.

  In the discharge hatch according to the present invention, the outer wall and the fluid plate are provided on the outer wall side peripheral portion of the fluid plate opening with respect to the contact surface provided on the inner wall side peripheral portion of the outer wall discharge port. Since it has the structure which contact | abutted the contact part, it is easy to decompose | disassemble an outer wall and a fluid board, and the cleaning which removes adhering flour can be performed very easily. Further, in the discharge hatch of the present invention, a plurality of vertical ribs connecting the small flange portion formed on the peripheral edge portion of the opening and the large flange portion formed on the opening end portion on the opposite side to the opening, Since it has a plurality of circumferentially formed lateral ribs, the rigidity of the fluidized plate can be increased, and the fluidized plate and the outer wall can be fastened as a whole with a high fastening force, reducing air leakage. Can be achieved.

  Hereinafter, a discharge hatch provided in an in-vehicle tank of a bulk vehicle for powder transportation according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the configuration of a powder transport bulk vehicle according to an embodiment of the present invention.

  The bulk transport vehicle 10 shown in FIG. 1 is a tank truck for transporting bulk flour as described above, and is provided with an in-vehicle tank 12 for storing flour at the top of the vehicle body. Flour is supplied and loaded from two front and rear hatches (input hatches) 14 provided on the upper surface of the vehicle-mounted tank 12. At this time, the hatch (air vent hatch) 14 provided between the hatches 14 into which the flour is introduced is opened, and the air sent along with the flour is vented. In addition, the hatch 14 into which the flour is introduced is not limited to the two front and rear hatches, and any hatch 14 may be used as the input hatch depending on the form of the loading factory. For example, the front and center hatches 14 may be input hatches, the rear hatch 14 may be an air release hatch, the center and rear hatches 14 may be input hatches, and the front hatch 14 may be an air release hatch.

  Further, when discharging the flour from the in-vehicle tank 12, the front portion of the in-vehicle tank 12 is pushed up by a hydraulic cylinder (not shown) so that the flour does not remain in the in-vehicle tank 12, and the in-vehicle tank 12 is tilted to 10, or a compressor installed in a loading factory (both not shown) is driven, and the generated compressed air is introduced into the upper front end of the vehicle-mounted tank 12 to pressurize the inside of the tank. Flowing air supplied from the outer wall 21 (see FIG. 2) into the air chamber 20 through a flow air pipe (not shown) is ejected from a fluid plate 22 (see FIG. 2) disposed inside the discharge hatch 16. The flour inside the discharge hatch 16 is fluidized and discharged from the discharge port 17.

  FIG. 2 is a cross-sectional view at a position passing through the center of the discharge port of the discharge hatch according to the embodiment. As shown in FIG. 2, the discharge hatch 16 includes a fluid plate 22, an air chamber 20, an outer wall 21, and the like. The fluid plate 22 is a member that is arranged along the inner wall of the air chamber 20 and has a truncated cone-shaped space inside that forms a predetermined space with the inner wall of the air chamber 20. Here, the fluidized plate 22 is formed of, for example, a sintered metal and has air permeability. That is, the fluid plate 22 is formed with a large number of minute vents that allow air to pass but not allow flour to pass.

  FIG. 3 is a cross-sectional view at a position passing through the center of the opening of the fluidized plate according to the embodiment, and FIG. 4 is a view of the outer wall of the fluidized plate as viewed from the opening. The fluid plate 22 has a space in the shape of a truncated cone, and is connected to a small flange portion 41 that forms an opening 40 at a position corresponding to the discharge port 30 (see FIG. 5). As shown in FIG. 6, a circumferential first contact portion 42 is formed at the tip of the small flange portion 41.

  At the opening end opposite to the side where the small flange portion 41 of the fluid plate 22 is provided, a circumferential shape that abuts against the second abutment surface 32 (see FIG. 5) of the outer wall 21 of the discharge hatch. A circumferential large flange portion 44 in which the second contact portion 43 is formed is connected.

  Eight vertical ribs 45 extending in the direction of the frustoconical shape of the fluid plate 22 are arranged at predetermined intervals on the outer wall portion of the fluid plate 22 and are welded to the small flange portion 41 and the large flange portion 44, respectively. Yes. In addition, two concentric ribs 46 that intersect with the vertical ribs 45 are formed on the outer wall portion of the fluid plate 22. In addition, five traction bolts (fastening members) 47 for fixing the fluid plate 22 and the outer wall 21 of the discharge hatch are provided on the outer wall of the fluid plate 22 in a circumferential shape.

  FIG. 5 is a cross-sectional view at a position passing through the center of the discharge port. As shown in FIG. 5, the outer wall 21 of the air chamber 20 has a frustoconical space inside, and has a discharge port 30 at the top of the space, and at the periphery of the discharge port 30 on the fluid plate 22 side. A circumferential first contact surface 31 is formed. A circumferential second contact surface 32 that contacts the fluid plate 22 is formed at the opening end opposite to the discharge port 30.

  As shown in FIGS. 2 and 6, the outer wall 21 of the discharge hatch and the fluid plate 22 are in contact with the first contact surface 31 through the O-ring 24 with the first contact portion 42 of the fluid plate 22. The second abutting portion 43 of the fluid plate 22 is brought into contact with the second abutting surface 32 through an O-ring (not shown) and assembled, and the outer wall 21 of the discharge hatch and the fluid plate 22 are assembled. It is fixed by five tow bolts 47.

  In this discharge hatch, the outer wall 21 of the discharge hatch and the fluid plate 22 are brought into contact with the first contact surface 31 of the air chamber 20 via the O-ring 24 and the first contact portion 42 of the fluid plate 22. Because of the contact structure, the outer wall 21 of the discharge hatch and the fluid plate 22 can be easily disassembled, and the flour adhering to the discharge hatch 21 and the fluid plate 22 can be easily cleaned.

  Further, in the fluidized plate 22, the large flange portion 44 and the small flange portion 41 are joined by welding with the eight vertical ribs 45, and further provided with two concentric circular ribs 46, so that the rigidity of the fluidized plate as a whole is increased. be able to. Accordingly, the fluid plate 22 and the outer wall 21 of the discharge hatch are fastened by five traction bolts arranged at approximately equal intervals, thereby dispersing the tensile load at the time of fastening and increasing the fastening force as a whole and reducing air leakage. can do.

It is a figure which shows the structure of the bulk vehicle for powder transportation concerning embodiment of this invention. It is sectional drawing for demonstrating the structure of the discharge hatch of the vehicle-mounted tank concerning embodiment of this invention. It is sectional drawing for demonstrating the structure of the fluidized plate concerning embodiment of this invention. It is a figure for demonstrating the structure of the one side of the fluidized plate concerning embodiment of this invention. It is sectional drawing for demonstrating the structure of the outer wall of the discharge hatch concerning embodiment of this invention. It is sectional drawing which shows the contact part of the outer wall of the discharge hatch which comprises the discharge hatch concerning embodiment of this invention, and a fluidized plate. It is a figure which shows the structure of the conventional bulk vehicle for powder conveyance. It is a figure for demonstrating the structure of the discharge hatch of the conventional vehicle-mounted tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Bulk vehicle for powder transportation, 12 ... Car tank, 14 ... Hatch, 16 ... Discharge hatch, 17 ... Discharge port, 20 ... Air chamber, 21 ... Outer wall of discharge hatch, 22 ... Fluid plate, 30 ... Discharge port, DESCRIPTION OF SYMBOLS 31 ... 1st contact surface, 32 ... 2nd contact surface, 40 ... Opening part, 41 ... Small flange part, 42 ... 1st contact part, 43 ... 2nd contact part, 44 ... Large Flange part, 45 ... vertical rib, 46 ... concentric circular rib, 47 ... traction bolt, 24 ... O-ring.

Claims (1)

A discharge hatch provided at the rear lower part of an on-vehicle tank mounted on a bulk vehicle for powder transportation,
An outer wall having a frustoconical space inside and having a discharge port at the top of the space, and a fluidized plate having air permeability provided with an opening corresponding to the discharge port arranged with a predetermined gap from the outer wall. And
When the powder is discharged from the discharge port, the air supplied to the gap between the outer wall and the fluidized plate is ejected through the fluidized plate to fluidize the powder remaining in the vicinity of the fluidized plate. In the discharge hatch that discharges from the discharge port,
The outer wall has a contact surface on the peripheral edge of the outlet of the inner wall,
The fluid plate is formed at a contact portion provided at a peripheral portion of the opening on the outer wall side, a small flange portion formed at a peripheral portion of the opening, and an opening end portion on the opposite side to the opening. A large flange portion, a plurality of vertical ribs arranged at predetermined intervals on the frustoconical outer wall of the fluidized plate connecting the small flange portion and the large flange portion, and a plurality of concentric circles intersecting the vertical rib With ribs,
The contact portion of the fluid plate is brought into contact with the contact surface of the outer wall via an O-ring, and the outer wall and the fluid plate are fastened by a plurality of fasteners. Discharge hatch.

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