JP3195820U - Screw conveyor for grain transportation - Google Patents

Abstract

The present invention provides a screw conveyor device in which only a deteriorated spiral blade can be replaced, and the replacement cost can be reduced. An appropriate number of flanges 14 are erected on a rotary shaft 10 so that the end of a spiral blade plate 20 is detachably supported via the flange, while the spiral blade plate is extended in the longitudinal direction when fixed. Thus, in order to reduce the diameter of the base end portion of the spiral blade and make it closely contact with the rotating shaft, the distance between the opposing flanges is set to be slightly larger than the longitudinal dimension of the spiral blade mounted between the flanges. The flanges may be arranged at appropriate places such as end portions and intermediate portions. The spiral blade can be removed from the flange and replaced at any time. [Selection] Figure 1

Description

  The present invention relates to a screw conveyor device for conveying grains, and more particularly, to a technique that enables replacement of a spiral blade that has deteriorated due to long-term use.

  As shown in FIG. 9, grains such as wheat, corn, and rice are stored in a storage tank such as a hopper 1 or transferred from the hopper 1 to a production line of a factory using a screw conveyor device 2. May be transferred.

  The screw conveyor device 2 includes, for example, a rotating shaft 4 in a cylindrical case body 3 and a spiral blade 5 welded and fixed to the rotating shaft 4, and is connected to the most upstream introducer 6 or relay 7. The rotary shaft 4 is driven through a motor (not shown) provided, the grain P is transferred through a spiral blade 5 that rotates following the rotary shaft 4, and the grain P is transferred from the most downstream discharger 8. Discharge. The screw conveyor device 2 is used in places where transfer by a belt conveyor, bucket conveyor or the like is difficult, such as vertical transfer, particularly when the transfer inclination angle is large. The screw conveyor device 2 is used in various stages such as harvesting → storage, storage → conveyance, storage → processing, etc. without being limited to a large inclination angle.

  Conventional techniques for transferring grain using a screw conveyor device include, for example, Patent Documents 1 and 2 below.

JP 2005-207631 A JP 10-045255 A

  The problem is that the replacement cost of aged screw parts (rotary shaft + spiral blade) is expensive.

  The spiral blade plate welded and fixed to the rotating shaft is worn by friction with the grain. And if it continues use, a welding location will become weak gradually with frictional heat, and a vibration (rotational vibration) will come to occur with rotation. If this is left untreated, the entire device, such as the bearing mechanism, will be damaged. When vibration starts, it is necessary to replace the screw parts (rotating shaft + spiral blade).

  However, since the screw parts of the conventional device have the spiral blades welded and fixed to the rotating shaft, it is necessary to replace the parts for each rotating shaft at the time of replacement.

  Normally, deterioration due to friction with grains appears as damage to the welded portion (base end portion) of the spiral blade plate using a thin metal plate, but no abrasion damage occurs on the rotating shaft itself.

  Accordingly, an object of the present invention is to make it possible to replace only a spiral blade that has deteriorated.

  In order to achieve the above object, a screw conveyor device according to the present invention has an appropriate number of flanges standing on a rotating shaft and detachably supporting an end of a spiral blade plate via the flanges, while facing flanges. Is set to be slightly larger than the longitudinal dimension of the spiral blade mounted between the opposing flanges.

  According to the first aspect of the present invention, since the spiral blade plate is detachably supported via the flange, it is possible to remove the spiral blade plate from the flange and replace only the spiral blade plate as necessary.

  It is desirable to dispose the flange at least at the left and right ends (or near the ends) of the rotating shaft. If the rotating shaft is long, a relay flange is provided as necessary.

  A spiral blade is mounted between the opposing flanges. At this time, the longitudinal dimension of the spiral blade is set slightly smaller than the span (separation dimension) between the flanges. This is because the diameter of the base end portion of the spiral blade plate is reduced by extending the spiral blade plate in the longitudinal direction at the time of mounting and fixing, and is brought into close contact with the rotating shaft.

  The flange may be formed by being bent into a shape that is in close contact with the end of the spiral blade (claim 2).

  The shape of the flange is not limited as long as the end of the spiral blade can be fixed. However, since the surface of the spiral blade is curved, a slight gap is generated between the surfaces to be fixed when a flat flange is used. Since the rotational speed of the screw conveyor device is moderate, there is no problem if a plurality of locations are fastened and fixed via metal fittings, but in order to prevent shaft runout, it is desirable to fix the surfaces in close contact. If the surfaces are brought into close contact with each other, it may be fixed at one place, and the number of parts of the fixture can be reduced.

  At least one of the flanges arranged at the left and right ends of the rotating shaft or in the vicinity of the end is detachable, while the relay flange arranged at an appropriate position of the rotating shaft may be detachable. (Claim 3).

  Even if the flange is fixed to the rotating shaft in a non-detachable manner, it is possible to screw the helical blade plate onto the rotating shaft while rotating the helical blade plate. However, in order to simplify the replacement operation of the spiral blades, it is preferable that one of the flanges arranged at the end portion be removable. This is because if the flange is removed from the rotating shaft, the spiral blade can be directly inserted into the rotating shaft without being rotated. Of course, both the left and right end flanges may be detachable. Also, when providing relay flanges, the replacement work can be facilitated by making all the relay flanges detachable.

  The flange to be detachable is erected and fixed to the outside of the pipe material to be attached to the rotating shaft, the pipe material is attached to the rotating shaft, and the pipe material and the rotating shaft can be attached and detached via a fixing bracket. There is a case where it is stopped and fixed (claim 4).

  When making the flange detachable, use a pipe material that can be fitted and fixed to the rotating shaft (for example, a round tube, a half tube, etc.). The flange can be fixed to this pipe material, and the pipe material can be attached and detached via a fixing bracket. Is desirable. This is because there is less deterioration due to friction with the grain than in the case where the flange is detachably installed on the rotating shaft. The flange erected on the pipe material is not limited to the end portion of the rotating shaft, and may be disposed at an appropriate position, for example, at an intermediate portion of the rotating shaft. Further, there is an advantage that only the flange can be replaced.

  The pipe material may be a semi-tube cut in the longitudinal direction along substantially the center of the tube (claim 5).

  When using pipe material (tube material) to attach the flange to the rotating shaft, use not only a round tube that fits outside the rotating shaft, but also a half tube cut in the longitudinal direction along the approximate center of the tube. You can also If a half tube is used, it is easy to attach to the rotating shaft, and it is possible to place a flange at an appropriate position of the rotating shaft, for example, at the center. When the rotating shaft is long, it is desirable to provide a flange at the intermediate portion and removably support the spiral blade at the end portion and the intermediate portion.

  According to the screw conveyor device according to the present invention, only the spiral blade can be replaced, and the replacement cost can be surely reduced as compared with the conventional device.

It is a figure which illustrates the spiral blade board and rotation shaft which concern on embodiment. It is a figure which illustrates the clearance gap between the spiral blade board which concerns on embodiment, and a rotating shaft main body. It is a figure which illustrates the state which attached the spiral blade board. It is a figure which illustrates the joined state of the spiral blade board and flange which concern on embodiment. It is a figure which illustrates the detachable flange which concerns on embodiment. It is a figure which illustrates other embodiment of a flange. It is a figure which shows embodiment using a half pipe as a pipe material which erects a flange. It is a figure which illustrates the case where the flange for a relay is provided in a rotating shaft. It is a figure which illustrates the use condition of a general screw conveyor apparatus.

  FIG. 1 shows a rotating shaft 10 according to an embodiment of the present invention and a spiral blade 20 attached to the rotating shaft 10.

  In this embodiment, the case where the flange 14 is provided only in the right and left both ends of the rotating shaft 10 is shown. As will be described later, when a relay flange is used, the length of the spiral blade 20 is adjusted by dividing it into a suitable number.

  The rotary shaft 10 is a metal shaft member having a length that allows an end portion to be attached to a bearing portion (not shown) of the screw conveyor device. However, the rotary shaft 10 according to the present invention has a flange 14 provided upright. Therefore, in the following description, only the shaft member excluding the flange 14 will be referred to as the shaft body 11 and described. The shaft main body 11 can use various standards / sizes used in conventional screw conveyor devices.

  The flanges 14 -R and 14 -L standing on the left and right end portions (may be near the end portions) of the shaft body 11 are in close contact with the left and right end blade plates 21 -R and 21 -L of the spiral blade plate 20, for example. Use a shape that fits. For example, when the spiral blade plate 20 is manufactured, the number of turns of the spiral is increased by two rotations, and the spirals for one rotation at both the left and right ends are cut to form flanges 14-R and 14-L, respectively.

  For example, the flanges 14 -R and 14 -L are fixed by welding the base end portion 14-2 near the left and right end portions of the shaft body 11. Further, the flanges 14-R and 14-L are provided with insertion holes 14-3 through which fixing brackets such as bolts are inserted.

  As shown in FIG. 1, the flanges 14 -R and 14 -L preferably have an insertion hole 14-3 at a symmetrical position with the shaft body 11 as an axis. This is to evenly distribute the weight balance of the fixing brackets such as bolts and to suppress shaft runout during rotation.

  The spiral blade 20 is formed by spirally forming a metal band-shaped plate material, and is formed by adjusting the number of turns so that the left and right end surfaces can be in close contact (surface contact) with the flanges 14-R and 14-L. In addition, insertion holes 24-3 through which the fixing metal fittings are inserted are provided at the positions overlapping the insertion holes 14-3 of the flanges 14-R and 14-L that are in surface contact with the left and right ends.

  The longitudinal dimension S1 of the spiral blade 20 is a separation dimension between two opposing flanges (14-R, 14-L), more specifically, an insertion hole 14-3 provided in the flanges 14-R, 14-L. It is set slightly smaller than the separation dimension S2. S2> S1. The reason is as follows.

  As shown in FIG. 2, the spiral blade 20 to be spirally formed is manufactured such that a slight gap Q is formed between the inner periphery and the shaft body 11 at the time of molding. This is because the clearance Q is provided between the inner peripheral diameter and the outer diameter of the shaft body 11, thereby facilitating the work when the spiral blade 20 is attached to / removed from the shaft body 11.

  However, since the spiral blade 20 according to the present invention is not welded to the shaft body 11, it is difficult to rotate it with the gap Q left. This is because if there is a gap Q, the spiral blade 20 may vibrate during rotation.

  Therefore, the longitudinal dimension S1 of the spiral blade 20 is made slightly smaller than the separation dimension S2 of the insertion hole 14-3, and as shown in FIG. The inner periphery of the spiral blade plate 20 is joined to the shaft body 11 as shown in FIG. 4 by utilizing the fact that the spiral blade plate 20 extends in the longitudinal direction and becomes smaller in inner diameter when closely attached to 14-L. I tried to do it. This is because, like the coil spring, the spiral blade 20 has a feature that the inner peripheral diameter decreases when the spiral blade 20 extends in the longitudinal direction and the inner peripheral diameter increases when compressed in the longitudinal direction.

  In this embodiment, since the flanges 14-R and 14-L are fixed to the shaft body 11 by welding, when the spiral blade 20 is attached to the shaft body 11, the spiral blade 20 is set in one direction around the axis. What is necessary is just to screw in exceeding one flange (for example, 14-R), rotating.

  According to this configuration, when the spiral blade 20 is attached to the shaft body 11, there is a slight gap between the left and right flanges 14-R, 14-L and the left and right end blades 21-R, 21-L. Although a gap is generated, the spiral blade 20 can extend in the longitudinal direction.

  Therefore, for example, one blade 21-R is brought into close contact with the flange 14-R, a fixing bracket (not shown) such as a bolt is inserted into the overlapping insertion holes 14-3 and 24-3, and a washer or the like is appropriately disposed. After tightening and fixing through the fixing member, the spiral blade plate 20 is extended in the longitudinal direction so that the other blade plate 21-L is brought into close contact with the flange 14-L, and is inserted into the insertion holes 14-3 and 24-3. If the fixing bracket is inserted and tightened and fixed, the inner periphery of the spiral blade 20 can be fixed in close contact with the surface of the shaft body 11.

  As a result, even if the inner periphery of the spiral blade plate 20 is not fixed to the shaft body 11 by welding, the spiral blade plate 20 can be driven to rotate without causing shaft shake during rotation. It can be removed from the shaft body 11.

  For this reason, when the spiral blade 20 deteriorates over time, only the spiral blade 20 needs to be replaced, and the shaft body 11 can continue to be used as it is, thereby reliably reducing the cost required for replacing the screw parts. I can do it.

  FIG. 5 illustrates a case where one flange (for example, the flange 14 -R) is detachably attached to the shaft body 11.

  The flange 14 -R according to this embodiment is fixed by welding to the pipe material 40, the pipe material 40 is fitted to the end of the shaft body 11, and is detachably fixed via a fixing bracket B such as a bolt. Is. Needless to say, the inner diameter W2 of the pipe member 40 is larger than the outer diameter W1 of the shaft body 11.

  The shaft body 11 and the pipe member 40 are provided with insertion holes 11-8 and 40-8 for inserting the fixing bracket B, respectively. When the insertion hole 40-8 provided in the pipe member 40 is overlapped with the insertion hole 11-8 of the shaft body 11, the insertion hole 14-3 of the flange 14-R is located at a preferred position (for example, the lower position). It is desirable to drill. In this embodiment, the insertion hole 40-8 is provided at a position that is perpendicular to the insertion hole 14-3 of the flange 14-R. This is for facilitating the positioning of the insertion hole 14-3 of the flange 14-R while ensuring the ease of fixing the pipe member 40.

  In this case, the end E of the shaft body 11 is preferably an open surface. This is because it is easy to place a washer or the like when a fixing bracket B such as a bolt for fastening and fixing the pipe member 40 is provided. Note that the end portion G of the pipe member 40 may be a closed end surface to be attached to the shaft member of the drive system (it may be an open end surface).

  According to such a configuration, since one flange 14-R can be detachably fixed to the shaft body 11, the flange 14-R is removed from the shaft body 11 together with the pipe material 40 when the spiral blade 20 is replaced. The spiral blade plate (20) can be pulled out and removed from the shaft body 11, and a new spiral blade plate 20 can be easily mounted by inserting it into the shaft body 11. Thereafter, the flange 14-R is mounted and fixed to the shaft body 11 together with the pipe material 40, and the pipe material 40 is fixed through an appropriate fixing bracket, and then the blades 21- at the left and right ends of the spiral blade 20 are fixed. R and 21-L may be fixed in close contact with the flanges 14-R and 14-L. Since the removal of the deteriorated spiral blade plate (20) and the installation of a new spiral blade plate 20 are facilitated, the spiral blade plate 20 can be replaced without requiring specialized techniques.

  The screw conveyor apparatus which concerns on this invention is not limited to what was demonstrated as the above embodiment.

  Either one of the insertion hole 40-8 of the pipe member 40 or the insertion hole 11-8 of the shaft body 11 is provided with a female screw member (nut-like member) for improving the screwing state of the fixing bracket B. You may do it. This is to prevent loosening of the fixing bracket B accompanying the rotation of the shaft body 11.

  Further, the number of the insertion holes 40-8 of the pipe member 40 and the insertion holes 11-8 of the shaft body 11 is not limited to one, and a plurality of them may be provided. When a female screw member is provided inside the insertion hole 40-8 of the pipe material 40, a guide slit that reaches the insertion hole 11-8 from the end of the shaft body 11 may be provided to facilitate the mounting of the pipe material 40. .

  In the case where one flange 14-R is detachable using the pipe material 40, an appropriate weight balancer may be provided on the flange 14-L side. This is to make the right and left weight balance even. For example, the flange 14 -L is also fixed through the pipe material 40. In that case, the flange 14-L may be fixed so as not to be removable, or may be fixed so as to be removable. The weight balancer may be a ring-shaped member that covers the shaft body 11.

  In the above-described embodiment, it has been described that the flanges 14-R and 14-L use a spiral material for one rotation of the spiral similar to the spiral blade plate 20, but the flanges 14-R and 14-L are spiral blades. What is necessary is just to perform the function which closely_contact | adheres to the right-and-left both ends (21-R, 21-L) of the board 20, and suppresses the vibration of the spiral blade board 20 at the time of rotation of the shaft main body 11. Therefore, as shown in FIG. 6, the flanges 14 -R and 14 -L may use a spiral material corresponding to a half rotation of the spiral blade 20. If the contact area with the shaft body 11 decreases, stable support of the spiral blade 20 becomes difficult, so it is desirable to set the number of turns to be half or more.

  Further, since the flanges (14-R, 14-L) need only be able to fix and support the left and right ends (21-R, 21-L) of the spiral blade 20, it is not always necessary to have a spiral shape. It does not matter. In the flanges (14-R, 14-L), the base end portion 14-2 is welded to the shaft body 11, but the base end portion 14-2 is provided with a brazing material via a fixing bracket such as a screw. It may be fixed to the shaft body 11.

  As shown in FIG. 7, it is desirable that the pipe material 40 uses a half tube 40-5 cut in the longitudinal direction along the approximate center of the tube. In the case of a tube having a circular cross section, it is necessary to cover the end of the shaft body 11 and fit it. However, if it is a semi-tube, it can be attached from the side, so the mounting work is easier than fitting. It is.

  As shown in FIG. 8, the advantage of using the semi-tube 40-5 is that when a relay flange 14 is provided at an appropriate position other than the end portion, for example, at the center position of the shaft body 11, the mounting becomes easy. is there.

  When the shaft body 11 is long and the spiral blade 20 has a long span, the work is facilitated by dividing the spiral blade 20 into an appropriate number, for example, two and mounting it on the shaft body 11. In this case, if the relay flange 14 using the semi-pipe 40-5 is disposed in the middle of the shaft body 11, the two-split spiral blade 20 can be mounted more easily. In this case as well, only one of the flanges 14 at the end of the shaft body 11 may be detachable. However, if both the flanges 14 at the end of the shaft body 11 are detachable, the attaching / detaching operation of the spiral blade 20 is further facilitated. It is desirable that all the relay flanges 14 be detachable. This is to facilitate the replacement work.

  When the flange is erected using the half pipe 40-5 obtained by cutting the pipe material in the transverse direction, the flange (14) having a spiral wing shape or other shape is provided on the end of the half pipe 40-5. It is desirable to fix the end base end of each of them. This is because, as long as there is no problem of strength, it is not necessary to extend the end portion of the half tube 40-5 so as to protrude outward from the fixing portion of the flange (14).

  Even when a relay flange is provided, the longitudinal dimension of the spiral blade installed between the flanges is set shorter than the span between the opposing flanges, and the spiral blade is extended in the longitudinal direction during installation. The contact with the rotating shaft (shaft body) is the same as in the embodiment already described.

DESCRIPTION OF SYMBOLS 10 Rotating shaft 11 Shaft body 14, 14-R, 14-L Flange 14-2 Base end part 11-8, 14-3, 24-3, 40-8 Insertion hole 20 Spiral blade 21-R, 21-L (End) vane plate 40 Pipe material 40-5 Half pipe B Fixing bracket E (Shaft body) End G (Pipe material) End Q Clearance S1 Longitudinal dimension of spiral blade (20) S2 Insertion hole ( 14-3) separation dimension W1 (shaft body) outer diameter W2 (pipe material) inner diameter

Claims (5)

In a screw conveyor device that fixes a helical blade to a rotating shaft,
An appropriate number of flanges are erected on the rotating shaft, and the end portions of the spiral blades are detachably supported through the flanges,
A screw conveyor device for conveying a grain, characterized in that a separation dimension of opposing flanges is set to be slightly larger than a longitudinal dimension of a spiral blade installed between the opposing flanges. The flange
2. The screw conveyor device for conveying grains according to claim 1, wherein the screw conveyor device is bent into a shape that is in close contact with the end of the spiral blade. The flange placed on the left and right ends of the rotating shaft or near the ends
While at least one of them is detachable,
3. The screw conveyor device for transferring grain according to claim 1, wherein all of the relay flanges arranged at appropriate positions of the rotary shaft are detachable. The removable flange is
Standing and fixing outside the pipe material to be attached to the rotating shaft,
4. The screw conveyor device for grain conveyance according to claim 3, wherein the pipe member is attached to the rotating shaft, and the pipe member and the rotating shaft are detachably fixed and fixed via a fixing bracket.   5. The screw conveyor device for conveying grain according to claim 4, wherein the pipe material is a half tube cut in a longitudinal direction along substantially the center of the tube.

Images