JP2004075369A - Conveyance device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyance device capable of positively conveying an object to be conveyed by preventing concurrent rotation. <P>SOLUTION: Protruding portions 5, 5, 5, 5 are formed over the roughly whole length of a casing 21 on the inner surface of a casing 21 of a vertical type screw conveyer. Even if the object to be conveyed begins to turn together with a screw, it comes into contact with the protruding portions 5, 5, 5, 5 and is conveyed, leaving the screw, thus preventing the concurrent rotation. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a transport device that transports articles in a vertical direction and a horizontal direction by combining a vertical screw conveyor and a horizontal conveyor.
[0002]
[Prior art]
For transporting powders, granules, and mixtures of these and liquids from low places such as basements to warehouses and transport vehicles provided above, and residues and scum from wastewater treatment plants such as human waste treatment plants and sewage treatment plants When the screen residue and sludge are carried upward, the conveyance is performed by combining a vertical screw conveyor with a horizontal belt conveyor or a screw conveyor. As such a transfer device, for example, a vertical screw conveyor disclosed in JP-A-3-56314 can be exemplified.
[0003]
The vertical screw conveyor disclosed in the above publication discloses a plurality of cylinders connected in the axial direction to form a single casing, into which a plurality of screws divided in the axial direction are inserted. Each of the divided screws has a polygonal hole at a connecting portion, and a polygonal connecting rod is inserted into the hole to thereby connect the screws. With such a structure, the screw can be easily extracted and assembled even if there is no space for extracting the screw in the upward direction.
[0004]
[Problems to be solved by the invention]
However, in the vertical screw conveyor disclosed in the above-mentioned publication, the conveyed material is sent upwards against the gravity, so that the so-called co-rotation in which the conveyed material is not conveyed upward merely by rotating with the screw blades may occur. is there. When the co-rotation occurs, it is necessary to extract the conveyed material inside the screw conveyor, so that it takes a very long operation time, and an operator for the extraction is also required, so that the cost is greatly increased. In addition, in this vertical screw conveyor, a plurality of short screws are connected by inserting a polygonal connecting rod into a polygonal hole formed in the screw. Fragile.
[0005]
The present invention has been made in view of such circumstances, and a main object of the present invention is to provide a transport device capable of preventing co-rotation and reliably transporting a transported object. It is another object of the present invention to provide a transport device that facilitates a screw extracting operation. Yet another object is to provide a conveying device with enhanced screw blades against overload.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 for achieving the above object is directed to a transfer device that transfers a load in a vertical direction and a horizontal direction by combining a vertical screw conveyor having a casing and a screw with a horizontal conveyor.
[0007]
Then, at least one of the convex portion and the concave portion is formed on the inner surface of the casing of the vertical screw conveyor over substantially the entire length of the casing.
[0008]
According to the configuration of the first aspect, the co-rotating conveyed object collides with the corner of the convex portion or the concave portion, so that the co-rotating is eliminated, and the conveyance in the vertical direction is reliably performed. The protrusion on the inner surface of the casing preferably has an amount of protrusion that does not make contact with the screw blade, that is, a protrusion amount smaller than the gap between the casing and the screw blade, because wear of the protrusion and the screw blade does not occur. The projections or depressions may be provided continuously over substantially the entire length of the casing, or may be provided intermittently. Further, the projections or the depressions may extend straight in the screw axis direction, may be provided spirally on the inner surface of the casing, or may be provided at intermittent and random positions.
[0009]
Next, the invention according to claim 2 provides a vertical screw conveyor having a conveyed article receiving port provided at a lower portion and a conveyed article discharging port provided at an upper portion, and a conveyed article connected to the conveyed article receiving port. The present invention is directed to a transport device that transports a transported product in a vertical direction and a horizontal direction in combination with a horizontal screw conveyor.
[0010]
And, a horizontal screw conveyor for supplying a conveyed article to the conveyed article receiving port is provided, and at least a portion of the screw blades of the vertical screw conveyor existing near the conveyed article receiving port and near the conveyed article discharging port; It is assumed that a reinforcing member extending substantially perpendicularly from the respective screw shafts is installed at least in a portion of the screw blades of the screw conveyor near the conveyed material receiving port.
[0011]
According to the configuration of claim 2, the screw blades are reinforced by the reinforcing member before and after the load receiving port and in the vicinity of the load discharge port where a transport trouble occurs and an excessive load is likely to be applied to the screw blades. Deformation can be prevented. Further, since the reinforcing member pushes out the conveyed object, corotation can be prevented. Here, the screw blade is a spiral portion provided substantially perpendicular to the screw shaft.
[0012]
Next, the invention according to claim 3 provides a vertical screw conveyor having a casing, a screw, and a base for accommodating the lower end of the screw, and a horizontal conveyor, and combines the transported products in the vertical direction and the horizontal direction. It is intended for transport devices that transport.
[0013]
And the said casing and the said base part shall each consist of several members which have a joining surface substantially parallel to a screw shaft.
[0014]
According to the configuration of claim 3, since the casing and the base portion are divided into a plurality of members along the screw shaft, the screw can be pulled out in the horizontal direction without lifting the screw upward. The screw can be easily extracted without any space.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a diagram of the transport device according to the present embodiment as viewed from the front. The transport device includes a vertical screw conveyor 1 installed substantially vertically, a push-in horizontal screw conveyor (horizontal conveyor) 2 connected to a load receiving port 11 below the vertical screw conveyor 1, and the vertical screw conveyor. In combination with a discharge horizontal screw conveyor (horizontal conveyor) 3 connected to a conveyed material outlet 12 on the upper part of the conveyor 1, the conveyed material is conveyed in the vertical and horizontal directions. The conveyed material is a powdered material, a granular material, a dehydrated sludge, or the like such as agricultural products, ores, and industrial products. The transport device of the present embodiment is used to transport such a transported material from a basement to the ground or from a lower floor to a higher floor.
[0017]
Each of the screw conveyors 1, 2, 3 includes a cylindrical casing 21, 22, 23, screws 31, 32, 33 installed therein, and a driving device 41 for driving the screws (for the horizontal conveyors 2, 3). The driving device is not shown). The screws 31, 32, 33 are composed of cylindrical screw shafts 16, 16, and screw blades 14, 14, 14 spirally provided substantially perpendicular to the screw shafts 16, 16, 16. The conveyed material is put into the push-in horizontal screw conveyor 2 from the entrance (not shown) of the push-in horizontal screw conveyor 2, is conveyed in the horizontal direction by the rotating screw 32, and is supplied to the conveyed material receiving port 11. Then, it is transported upward by the rotation of the screw 31 in the vertical screw conveyor 1 and reaches the transported material discharge port 12. Then, it is supplied from the conveyed material discharge port 12 into the unloading horizontal screw conveyor 3 and is conveyed in the horizontal direction to the destination by the rotation of the screw 33.
[0018]
Next, the protrusion 5 provided on the inner surface of the casing 21 of the vertical screw conveyor 1 shown in FIG. 2 will be described.
[0019]
On the inner surface of the casing 21 of the vertical screw conveyor 1, convex portions 5, 5, 5, 5 are provided over substantially the entire length of the casing 21. The convex portions 5, 5, 5, 5 are provided at four locations in the circumferential direction, and are arranged so as to be shifted from each other by 90 degrees about the central axis of the screw 31. These protrusions 5, 5, 5, 5 are ridges extending in the longitudinal direction of the casing 21, and the height from the inner surface of the casing 21 is set so that the clearance between the screw 31 and the screw blade 14 is 2 mm. Have been. It is preferable that the clearance be 1 to 4 mm because contact with the screw blade 14 can be avoided.
[0020]
These convex portions 5, 5, 5, 5 are for preventing the co-rotation of the conveyed object. In other words, in the absence of these convex portions 5, 5, 5, 5, for example, a conveyed object that contains water and easily adheres to the screw 31 is conveyed upward against gravity, and thus adheres to the screw 31. Sometimes it turns around. At this time, the conveyed object is in a state of sliding between the inner surface of the casing 21. On the other hand, when the convex portions 5, 5, 5, 5 are present, the conveyed material is caught by the convex portions 5, 5, 5, 5, and stops moving away from the screw 31 to rotate together. It will be transported. If the convex portion 5 is provided at one place in the circumferential direction, the effect of preventing the co-rotation can be obtained. Further, it is preferable that the height of the convex portion 5 from the inner surface of the casing 21 be 3 mm or more, because the effect of preventing co-rotation is ensured. In the present embodiment, the height is 6 mm. However, if the height is too high, the distance between the screw blade 14 and the casing 21 increases, and the transport efficiency decreases. Therefore, the height is preferably 15 mm or less.
[0021]
Here, the screw 31 is fixed at the base 6 at the lower end, but is free at the upper end. Easy to contact with. Therefore, as shown in FIG. 4, a protective member such as a fluororesin or a high-density ultrahigh molecular weight polyethylene resin having a low friction coefficient and a high abrasion resistance is provided on the outer edge of the screw blade 14 over four rounds of the screw blade 14 above the screw 31. 18 are provided. By providing the protective member 18 in this manner, even if the screw 31 is shaken and comes into contact with the casing 21 or the convex portions 5, 5, 5, 5, the rotation of the screw 31 is not hindered. The parts 5, 5, 5, 5 are not damaged. In addition, as shown in FIG. 5, in order to provide the protection member 18, a support portion 19 which rises vertically from the outer edge of the screw blade 14 is provided. The protection member 18 is fixed to the support 19 with bolts and nuts.
[0022]
Next, the structure of the casing 21 will be described.
[0023]
This casing 21 is formed by connecting four cylinders. Both open ends of the cylinders are provided with flanges 25 and used for connecting the cylinders. In addition, the lowermost cylinder is provided with an inspection port 26 for confirming and removing the jam of the conveyed object and the conveyed object receiving port 11. The uppermost cylinder has an inspection port 26, and the upper opening serves as the transported object discharge port 12.
[0024]
Further, each cylinder constituting the casing 21 is composed of two members having joining surfaces 27, 27 substantially parallel to the screw shaft. That is, each cylinder is divided into two parts by a plane substantially parallel to the axis, and becomes two trough-shaped members having a semicircular cross section. The joining surfaces 27, 27 of the members are surfaces of a portion that protrudes outward from the edge of the semicircle of the cross section, and the two joining surfaces 27, 27 are overlapped and fixed by bolts and nuts. As described above, since each cylinder constituting the casing 21 can be divided into half vertically, the screw 31 can be pulled out not in the upper direction but in a substantially horizontal direction when the screw 31 is pulled out. Furthermore, since the base part 6 for accommodating the lower end of the screw 31 is also composed of a plurality of members having a joint surface 7 substantially parallel to the screw shaft, when the base part 6 is divided from the joint surface 7, the lower end of the screw 31 becomes Since the screw 31 is pulled out horizontally without being caught by the part 6, the screw 31 can be easily pulled out even if there is no space for pulling out the screw 31 above. Therefore, it is possible to provide a transport device having a height up to the ceiling of the building, so that the vertical screw conveyor 1 can be easily disassembled, maintained, and assembled. In addition, a single screw 31 having excellent strength can be used instead of a split screw having low strength.
[0025]
Subsequently, the reinforcing member of the screw blade will be described.
[0026]
As shown in FIG. 1, the screw blade reinforcing member 8 is attached to the screw blade 14 of the push-in horizontal screw conveyor 2 near the load receiving port 11 and the screw blade 14 of the vertical screw conveyor 1 near the load discharge port 12. It is installed to extend substantially vertically from the screw shaft 16. Although not shown, it is also installed on the screw blade 14 of the vertical screw conveyor 1 near the transfer receiving port 11. FIG. 3A is a view of the screw 31 of the vertical screw conveyor 1 as viewed from below. The two reinforcing members 8, 8 are installed at positions where one is rotated 180 degrees from the other about the screw shaft 16. The reinforcing member 8 is formed by dividing a metal pipe in half by a plane including a shaft, and the cut surface of the half is welded and fixed to the screw blade 14. One end of the reinforcing member 8 is welded to the screw shaft 16 and the other end is closed by a metal plate. Therefore, the conveyed article does not enter the space of the reinforcing member 8. In addition, since the reinforcing member 8 is installed in a kamaboko shape on the screw blade 14, the conveyed object can be pushed out to prevent co-rotation, and the conveyed object slides on the curved surface of the reinforcing member 8 with good timing. Therefore, it does not stay at the reinforcing member 8. The same reinforcing members 8 are installed on the screw blades 14 of the vertical screw conveyor 1 and the screw blades 14 of the pushing horizontal screw conveyor 2 near the conveyed object receiving port 11.
[0027]
At the article receiving port 11 where the reinforcing member 8 is installed, the conveying direction changes from horizontal to upward, so that the load on the screw blade 14 for conveying becomes larger than at other places, and Due to a trouble, the conveyed product may be jammed and an excessive load may be applied. Therefore, without such a reinforcing member 8, the screw blade 14 is deformed. The same applies to the conveyed material discharge port 12. When the conveyed material enters the unloading horizontal screw conveyor 3 from the conveyed material discharge port 12, the conveying direction changes to horizontal, and the load does not increase in this portion. Although it is not necessary to install, it may be installed.
[0028]
As described above, in the transport device of the present embodiment, since the convex portion 5 is provided on the inner surface of the casing 21 of the vertical screw conveyor 1 over substantially the entire length of the casing 21, the transported object rotates together. Can be prevented, and the conveyance can be performed efficiently. In addition, there is no need to stop the transport device when rotating together and remove the transported object from the inside, so that the transport cost can be reduced. Since the reinforcing member 8 is provided in a portion of the screw blade 14 where a large transport load is applied, even if the transport load increases, the screw blade 14 is not deformed and co-rotation can be prevented. Furthermore, the casing 21 of the vertical screw conveyor 1 is composed of a plurality of members having a joining surface substantially parallel to the screw shaft, and the base 6 is also composed of a plurality of similar members. It can be pulled out in any direction, and maintenance, disassembly and assembly are easy.
[0029]
This embodiment is one example, and the present invention is not limited to this embodiment. For example, as shown in FIG. 6, there are a plurality of convex portions 5, 5, 5,... On the inner surface of the casing 21 of the vertical screw conveyor 1, and they are not aligned in a longitudinal direction of the casing 21; It may be arranged in any place over substantially the entire length in the direction. As shown in FIG. 7, the casing 21 is divided into three parts, and recesses 28, 28, 28 are formed on the inner surface of the casing 21 with spacers 29, 29, 29 interposed therebetween at the joint surfaces 27, 27, 27. The protrusion 5 may be used instead. Further, both the concave portion 28 and the convex portion 5 may be formed on the inner surface of the casing 21. The shape of the protrusion 5 is not limited to a ridge, but may be a hemispherical protrusion or a shape such as a triangle. The reinforcing member 8 is not limited to a half of a metal pipe, and may protrude from the screw blade 14 in a rib shape. Furthermore, the number of reinforcing members 8 to be installed is not particularly limited, and the reinforcing members 8 may be installed over the entire length of the screw 31 of the vertical screw conveyor 1, or may be installed over the entire length of the horizontal screw conveyor 2. 8 may be installed. .
[0030]
【The invention's effect】
The present invention is implemented in the form described above, and has the following effects.
[0031]
Since the inner surface of the casing of the vertical screw conveyor has at least one of the convex portion and the concave portion over the entire length thereof, co-rotation of the conveyed product can be prevented. Since the reinforcing member is provided in a portion of the screw blade where a large load is applied, the screw blade is not deformed. Since the casing and the base of the vertical screw conveyor are composed of a plurality of members having a joining surface substantially parallel to the screw shaft, the screw can be easily pulled out in a substantially horizontal direction.
[Brief description of the drawings]
FIG. 1 is a front view of a transport device according to an embodiment.
FIG. 2 is a top view of a casing of a vertical screw conveyor.
3A is a view of the screw of the vertical screw conveyor as viewed from below, and FIG. 3B is a cross-sectional view taken along line AA of FIG.
FIG. 4 is a diagram showing an upper part of a screw of a vertical screw conveyor.
FIG. 5 is a sectional view of a portion B in FIG. 4;
FIG. 6 is a diagram showing an inner surface of a casing of a vertical screw conveyor according to another embodiment.
FIG. 7 is a cross-sectional view of a casing of a vertical screw conveyor according to another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vertical screw conveyor 2 Push-in horizontal screw conveyor 3 Unloading horizontal screw conveyor 5 Convex part 6 Base part 7 Joint surface 8 Reinforcement member 11 Conveyance receiving port 12 Conveyance discharge port 14 Screw blade 16 Screw shaft 21 Casing 27 Joint surface 28 Recess

Claims (3)

A transport device that transports the transported product in a vertical direction and a horizontal direction by combining a vertical screw conveyor and a horizontal conveyor with a casing and a screw,
A transport device, wherein at least one of a convex portion and a concave portion is formed on the inner surface of the casing of the vertical screw conveyor over substantially the entire length of the casing. A vertical screw conveyor provided with a load receiving port at the bottom and a load discharge port at the top, and a horizontal screw conveyor connected to the load receiving port and supplying the load, are combined to transfer the load. A transport device for transporting vertically and horizontally,
In the screw blades of the vertical screw conveyor, at least the vicinity of the conveyed material inlet and the portion existing near the conveyed material outlet, and the screw blades of the horizontal screw conveyor at least a portion existing near the conveyed material inlet. A transport device comprising a reinforcing member extending substantially perpendicularly from each screw shaft. A vertical screw conveyor having a casing, a screw, and a base portion for accommodating the lower end of the screw, and a horizontal conveyor, which is a transport device that transports the transported product in the vertical direction and the horizontal direction in combination with the vertical screw conveyor,
A transport device, wherein the casing and the base are each composed of a plurality of members having a joining surface substantially parallel to a screw shaft.

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