JP2010005614A - Drum screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum screen of a small size capable of inhibiting treated matter from flocculating again or undergoing similar change. <P>SOLUTION: A circular tube shaped screen is formed by arranging a plurality of rods to constitute a circular tube. An annular roller accepting ring is fixed to annular frames at both ends of the circular tube shaped screen. Two rotary rollers having a rotary shaft in parallel with an inclination direction are pivoted at each of left/right positions on the low position side and left/right positions on the high position side on an inclined base frame. The center rotary shafts of the left/right rotary rollers on the low position side and the center rotary shafts of the left/right rotary rollers on the high position side are connected with each other, respectively, by connection shafts. The circular tube shaped screen is installed on the four rotary rollers on the front/rear sides in an inclined posture. A thrust bearing roller is rotatably installed on the base frame on the low position side of the screen. The outer circumference of the thrust bearing roller is set to abut with the side face of the annular roller accepting ring. Any one of the rotary shafts of the rotary rollers is driven by a drive motor to turn. Thus, the circular tube shaped screen can be turned around the common rotary shaft. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drum screen suitable for sieving, for example, a highly moisture and highly viscous substance such as soil and mud.

  Conventionally, a rotary sieving device called a so-called drum screen has a plurality of rods arranged in a cylindrical shape at a predetermined interval to form a cylindrical screen having a sieving function, on both sides of the cylindrical screen. Cylindrical parts for supporting the screen are provided on the same central axis, and the screens are supported by rollers on the cylindrical parts on both sides, and a driven sprocket is provided on the outer periphery of one cylindrical part. There has been proposed one in which an endless chain is wound between them and a cylindrical screen is rotated through the cylindrical portion (Patent Documents 1 and 2).

  In addition, a drum screen has been proposed in which a rod-shaped member is provided on the rod of the drum screen, and the mesh of the rod is formed by the rod-shaped member (Patent Document 2).

JP 2002-113422 A JP-A-2005-342583

  By the way, although the drum screen of the above-mentioned patent document 1 has robustness that can cope with a wide particle size distribution, it is over-spec depending on the state of the raw material, and the device itself including the drive system is large. Basically, it was fixedly installed at a predetermined site and used.

  In addition, since the drum screens of Patent Documents 1 and 2 have structurally long cylindrical portions on both sides of the cylindrical screen, it is conceivable that the workpieces to be screened are attached and aggregated in the cylindrical portion.

  In addition, since the drum screen is supported on the support roller in the cylindrical portion in an inclined state, the movement of the drum screen in the thrust direction (center axis direction) is limited to suppress wear between the cylindrical portion and the support roller. Is desired.

  Moreover, although the drum screen of the said patent document 2 can form a sieve mesh with a hook-shaped member, when a hook-shaped member is worn out, it is necessary to replace the rod itself.

  The present invention has been made in view of the above-described conventional problems. By improving the structure of the drive system of the cylindrical screen, the overall size can be reduced, and the re-aggregation of the object to be processed can be prevented. It aims at realizing the drum screen which prevented.

  In addition, by improving the structure of the drive system of the cylindrical screen, etc., it is possible to reduce the size as a whole, suppress the wear of the support roller as much as possible, and facilitate the replacement when the ring-shaped member is worn, An object is to provide a drum screen with good maintainability.

  Another object of the present invention is to provide a drum screen capable of preventing wear of a support roller or the like that supports the drum screen by limiting the movement of the drum screen in the thrust direction (center axis direction) while achieving downsizing as a whole. And

  In addition, by realizing a downsizing as a whole, a rod screen having a ring-shaped member can be attached to and detached from the rod, thereby realizing a drum screen that facilitates replacement of the cladding tube when the ring-shaped member is worn. With the goal.

In order to achieve the above object, the present invention
First, a pair of bearing annular frames are arranged on a common central axis, a plurality of bearing holes are provided at predetermined intervals in the circumferential direction of each annular frame, and both ends of the rod are inserted into each bearing hole of both frames. By loosely supporting the portion, a plurality of rods are arranged in a cylindrical shape having the common central axis together to form a cylindrical screen, and the common central axis is attached to the both-end bearing annular frame of the cylindrical screen. A common roller receiving ring is fixed, and each outer peripheral surface of both rings is a roller support surface. A rotating roller having a rotation axis parallel to the inclined direction on an inclined frame is connected to the left and right positions on the low position side and the high position Two wheels are provided at the left and right positions on the side, and the rotation center axes of the left and right rotation rollers on the low position side are connected to the rotation center axes of the left and right rotation rollers on the high position side by connecting shafts. On the four rotating rollers, the roller receiver A cylindrical screen is installed in an inclined state on the roller by placing each roller support surface of the ring, and a rotating shaft orthogonal to the common central axis is provided on a lower frame of the cylindrical screen. The thrust receiving roller is rotatably mounted, and the outer peripheral surface of the thrust receiving roller is brought into contact with the side surface of the roller receiving ring on the low position side, and the rotating shaft of any one of the rotating rollers is rotated by a drive motor. By being driven, the cylindrical screen is configured to be rotatable around the common central axis, and is constituted by a drum screen.

  With this configuration, the cylindrical screen can be rotationally driven by the rotating roller via the roller receiving ring. For example, the drum screen including the drive motor can be configured on a single frame, and the entire drum screen can be configured. It becomes possible to make it small. In addition, since there is no cylindrical portion for driving, it is possible to prevent the material from re-aggregating in connection with the sieving operation and realize an efficient sieving operation. Further, since the thrust receiving roller can suppress the movement of the cylindrical screen in the thrust direction, wear of the ring due to friction between the rotating roller and the roller receiving ring can be suppressed.

Secondly, the roller receiving ring is formed integrally with the outer peripheral surface of the bearing annular frame, and is constituted by the drum screen according to the first aspect.

  If comprised in this way, the bearing annular frame of both ends and the roller receiving ring of both ends can be united, and a cylindrical screen can be reduced more in size.

  Third, a drive motor that drives one of the rotating rollers connected to the connecting shaft on one side and one rotating shaft of the rotating rollers connected to the connecting shaft on the other side are driven. The drum screen according to the first or second aspect is provided with a drive motor.

  If comprised in this way, a cylindrical screen can be rotationally driven with a rotating roller, for example, it can comprise on a single frame including a drive motor, and the whole drum screen can be comprised small. .

  Fourth, the driving shaft of the driving motor is connected to the rotating shaft of the rotating roller, and the four-wheel rotating roller, the thrust receiving roller, and the driving motor are disposed on the frame. It is comprised by the drum screen in any one of said 1st-3rd characterized by the above-mentioned.

  With this configuration, for example, by directly connecting the drive shaft of the drive motor to the rotation shaft of the rotating roller, the drive system of the cylindrical screen can be configured very compactly. It becomes possible to arrange | position on a frame.

  Fifth, a rod cladding tube that can cover the outer periphery of the rod is provided, and one or more ring-shaped members are fixed to the outer periphery of the rod cladding tube, so that the rod outer periphery is covered with the rod cladding tube. Thus, the ring-shaped members in the adjacent rods are arranged in a staggered manner, and the ring-shaped members are overlapped in the axial direction of the rod, and the square mesh is formed by the ring-shaped members adjacent in the axial direction of the rod It is comprised by the drum screen in any one of said 1st-4th characterized by the above-mentioned.

  If comprised in this way, a square sieve mesh can be formed with a rod-clad tube, and when a ring-shaped member is worn out, it is only necessary to replace the rod-clad tube, so that maintainability can be improved.

  Sixth, the rod cladding tube is configured by the drum screen according to the fifth aspect, which can be attached to the outer periphery of the rod from the end of the rod and can be removed from the end of the rod.

  If comprised in this way, attachment to the said rod of a rod cladding tube and removal from this rod can be performed easily.

  As described above, the present invention can be formed compactly (compact) as compared with a conventional drum screen, and the drum screen can be provided with mobility, for example, mounted on a self-propelled crawler.

  Further, since the weight of the drum screen can be reduced by reducing the size of the entire drum screen, the required power can be greatly reduced.

  In addition, it is possible to realize efficient sieving operation by eliminating the attachment or re-aggregation of raw materials such as soil and mud to the cylindrical portion of the conventional drum screen.

  Further, since the thrust receiving roller can suppress the movement of the cylindrical screen in the thrust direction, wear of the ring due to friction between the rotating roller and the annular roller receiving ring can be suppressed.

  In addition, a rod screen with a ring-shaped member can be attached to the rod to form a square sieve mesh, and since the rod cover tube can be easily replaced, a drum screen with good maintainability can be realized. is there.

1 is a schematic side view of a drum screen according to the present invention. It is a cross-sectional view of a screen same as the above, and is a cross-sectional view taken along line X1-X1 of FIG. It is a front view of a screen same as the above. It is the X2-X2 sectional view taken on the line of FIG. It is the X3-X3 sectional view taken on the line of FIG. It is a disassembled perspective view of the annular bearing frame vicinity of a screen same as the above. It is a partial front view of the horizontal disk of the small diameter cylinder of a screen same as the above. It is side surface sectional drawing of the annular bearing frame vicinity of a screen same as the above. It is a perspective view which shows the cladding tube and rod which are used for a screen same as the above. It is a figure which shows the state which mounts the cladding tube used for a screen same as the above to a rod, (a) (b) is a state which inserts a rod, (c) is a figure which shows the state which mounted | wore the cladding tube to the rod. It is a partial side view of the drum screen which shows the state which mounted | wore the rod with the cladding tube used for a screen same as the above. It is X4-X4 sectional drawing of FIG.

  Hereinafter, a drum screen according to the present invention will be described in detail with reference to the accompanying drawings. In the following description, the raw material input side (the guide ring 8 side in FIG. 1) of the drum screen 1 is the front side, and the outlet side (the small-diameter cylindrical portion 7 side in FIG. 1) is the rear side. In 2), when the front is viewed from the rear, the rotation roller 14b side is the left and the rotation roller 14b ′ side is the right.

  FIG. 1 is a side view of a drum screen 1 according to the present invention. A cylindrical screen 5 of the drum screen 1 has the following configuration.

  That is, the cylindrical screen 5 includes a plurality of rods 2 and 2 ′ arranged in a cylindrical shape having a central axis (common central axis) P <b> 1 at a predetermined interval, and an intermediate between these rods 2 and 2 ′. Intermediate bearing annular frames 3, 3 (see FIG. 4) for supporting the parts, both end bearing annular frames 4, 4 '(see FIG. 2) for supporting both ends of the rods 2, 2', and the both end bearing annular frames Front and rear roller receiving rings 6 and 6 'provided concentrically with the central axis P1 and integrally with the annular frames 4 and 4' on the outer peripheral surface of each of 4 and 4 ', and the rear bearing annular frame 4 is fixed to the rear plate surface 4a by a bolt B1 with a horizontal disk 7a, and protrudes in the outlet direction behind the screen 5 concentrically with the central axis P1, and the front bearing ring. Horizontal circle on front side plate surface 4a 'of frame 4' 8a is bolted drives out (not shown), and a guide ring 8 projecting at the inlet side of the screen 5 concentrically with the center axis P1 (see FIG. 5).

  The rods 2 and 2 'include a cylindrical fixed rod 2' having a circular cross section and a prismatic floating rod 2 having a square cross section (see FIGS. 4 and 6). Eight fixed rods 2 'are provided for each fixed angle of the annular frames 4 and 4' (see FIG. 3), and these rods 2 'penetrate each fixed angle of the intermediate bearing annular frames 3 and 3. It is fixed to the eight bearing holes 3a provided (see FIG. 4), and the both ends are inserted into the eight bearing holes 4b, 4b 'penetrating the both end bearing annular frames 4, 4' at a predetermined angle. The part is fixed (see FIG. 5).

  Between the bearing holes 3a of the intermediate bearing annular frames 3 and 3, a plurality of circular bearing holes 9 at a constant angle (every predetermined interval in the circumferential direction) (8 in this embodiment, a total of 64 between the bearing holes 3a). ) Are provided in the circumferential direction (see FIG. 4). Similarly, a plurality of gaps are provided between the bearing holes 4b of the both end bearing annular frames 4 and 4 ′ at every predetermined angle (at a predetermined interval in the circumferential direction). The circular bearing holes 9 (eight in this embodiment, a total of 64 between the bearing holes 4b) are provided (see FIG. 2), and the floating rods 2 are inserted into the circular bearing holes 9, respectively. Has been.

  In addition, on the surface of the horizontal disks 7a and 8a, bearing holes 7c for inserting and fixing both end portions of the fixing rod at positions corresponding to the bearing holes 4b and 4b 'are provided so as to penetrate the bearing holes 7c. In the meantime, small-diameter bearing holes 10 for loosely inserting and supporting the small-diameter protruding shafts 2 ″ at both ends of the floating rod 2 correspond to the bearing holes 9 at every predetermined angle (at a predetermined interval in the circumferential direction) (this embodiment) In the form, eight are provided between the bearing holes 7c, for a total of 64) (see FIGS. 3, 7, and 8).

  The circular bearing holes 9 of the intermediate bearing annular frames 3 and 3 and the both end bearing annular frames 4 and 4 ′ (see FIGS. 4 and 6) are larger than the width of the floating rod 2 (diagonal line having a square cross section). The floating rod 2 is loosely inserted into the bearing holes 9 of the intermediate bearing annular frames 3 and 3 and the end bearing annular frames 4 and 4 ', respectively. The small-diameter protruding shafts 2 "at both ends are inserted into the small-diameter bearing holes 10 provided in the front and rear horizontal disks 7a, 8a, respectively, and both ends (both small-diameter protruding shafts 2") are pivotally supported by the small-diameter bearing holes 10. (See FIGS. 7 and 8).

  Each of the small diameter bearing holes 10 of the horizontal disks 7a, 8a at both ends also has a diameter larger than the diameter of the small diameter protruding shaft 2 ″ at both ends of the rod 2, so that the small diameter protruding shaft 2 ″ at both ends of the rod 2 is Each small-diameter bearing hole 10 is loosely supported with a predetermined gap t (see FIGS. 7 and 8). Therefore, these floating rods 2 are configured such that they can vibrate, rotate, etc. within the range of the gap t when the cylindrical screen 5 rotates in the direction of arrow A about the central axis P1.

  As shown in FIG. 6, the roller receiving ring 6 on the rear side is integrally formed with an annular rib 6b for preventing wheel removal protruding in the outer circumferential direction on the rear side of the flat roller support surface 6a over the entire circumference. The cross section is substantially L-shaped. Further, the roller receiving ring 6 ′ on the front side has a symmetrical shape with the roller receiving ring 6 on the rear side, and an annular rib 6b ′ for preventing wheel removal protruding in the outer peripheral direction on the front side of the roller support surface 6a ′. It is integrally formed over the entire circumference and similarly has a substantially L-shaped cross section.

  Further, annular ring 11 and 11 'for preventing wheel removal are similarly fixed concentrically by bolts B2 on the opposite side surfaces of both roller receiving rings 6 and 6', and the roller support surfaces 6a and 6a '. Are configured to be prevented from being removed in the front-rear direction by the annular ribs 6b, 6b ′ and the annular rings 11, 11 ′.

  In the intermediate bearing annular frames 3 and 3 and the rear bearing annular frame 4, an annular dam plate 12 for increasing the material passage time of the raw material supplied into the screen is provided with a bolt B 3 concentrically with the central axis P 1. Is fixed.

  Next, the frame and drive system of the cylindrical screen 5 configured as described above will be described.

  The frame 13 on which the cylindrical screen 5 is placed has a downward inclination angle from the front side to the rear side, and as shown in FIG. 2 before and after the upper surface 13a of the frame 13 in the left direction. Two rotation rollers 14a and 14b having the same diameter parallel to the central axis P1 (parallel to the tilting direction of the underframe 13) have two bearing parts 15a and 15b, respectively. It is supported. The bearing portions 15a and 15b are fixed to support legs 15 and 15 provided at a high position and a low position of the frame 13, respectively.

  Further, at the symmetrical position of the rotating rollers 14a and 14b on the right side on the frame 13, the rotating roller has the same central axis P3 parallel to the central axis P1 (parallel to the tilting direction of the frame 13). Two rotating rollers 14a ′ and 14b ′ having the same diameter as 14a and 14b are rotatably supported by two bearing portions 15a ′ and 15b ′, respectively. The bearing portions 15 a ′ and 15 b ′ are fixed to support legs 15 ′ and 15 ′ which are symmetrical positions of the bearing portions 15 a and 15 b and are provided at a high position and a low position of the frame 13.

  Further, the rotation shafts of the left rotation rollers 14a and 14b are connected to each other by a connection shaft 16 on the center axis P2, and the rotation shafts of the right rotation rollers 14a 'and 14b' are connected to the connection shaft 16 on the center axis P3. The rollers 14a and 14b and the rollers 14a 'and 14b' are connected to each other by the connecting shafts 16 and 16 '.

  Accordingly, the central axes P2 and P3 and the connecting shafts 16 and 16 ′ of the left rotating rollers 14a and 14b and the right rotating rollers 14a ′ and 14b ′ are inclined at the same inclination angle as the frame upper surface 13a. It is inclined from the front side to the rear side with an angle (see FIG. 1), and when the cylindrical screen 5 is placed on these four rollers, the central axis P1 of the screen 5 and each roller The central axes P2 and P3 are configured to be parallel with the same inclination angle.

  The distance T between the center axis P2 of the left rotation rollers 14a and 14b and the center axis P3 of the right rotation rollers 14a ′ and 14b ′ is on the rotation rollers 14a and 14a ′ and the rotation rollers 14b and 14b ′. The interval is set so that the front and rear roller receiving rings 6, 6 ′ of the drum screen 1 can be placed thereon.

  Therefore, when the drum screen 1 is placed on the rotating rollers 14a, 14a ′, 14b, and 14b ′, the left and right rotating rollers at the front are positioned on the left and right positions of the roller support surface 6a ′ of the roller receiving ring 6 ′ at the front. The outer peripheral surfaces of 14a and 14a 'are in contact with each other, and the outer peripheral surfaces of the rear left and right rotating rollers 14b and 14b' are in contact with the left and right positions of the roller support surface 6a of the rear roller receiving ring 6, whereby the drum The screen 1 can be placed on each of the rotating rollers 14a, 14a ′, 14b, and 14b ′ in a state inclined rearward at the same inclination angle as that of the frame 13 (see FIG. 1, see FIG.

  Further, the rotating shaft of the rotating roller 14a is connected to the driving shaft M1 ′ of the driving motor M1 via the bearing portion 15a, and the rotating shaft of the rotating roller 14b ′ is connected to the driving motor M2 via the bearing portion 15b ′. And the drive motors M1 and M2 are driven to rotate in the same direction at the same speed, thereby rotating the cylindrical screen 5 in the direction of arrow A about the central axis P1. Configured to get. That is, the drive motor M1 simultaneously rotates the shaft rotation rollers 14a and 14b in the direction of the arrow A ′ (FIG. 3) via the connecting shaft 16, and the drive motor M2 connects the rotation rollers 14a ′ and 14b ′ to the connection shaft 16. Are simultaneously rotated in the direction of the arrow A 'through the' (Fig. 3), and the cylindrical screen 5 is rotated by the rotation of the rotating rollers 14a, 14b, 14a ', 14b' in the same direction (arrow A 'direction). It is configured to be able to rotate in the direction of arrow A.

  A side surface 17a of the thrust receiving roller 17 is in contact with the rear side surface 6b '' of the roller receiving ring 6 on the rear side (FIGS. 1 and 3). The thrust receiving roller 17 is rotatable on a rotating shaft 18 thereof. The rotary shaft 18 is supported by an L-shaped angle 19 provided at the center of the front plane portion 13a ′ of the upper surface 13a of the underframe 13. More specifically, the thrust is supported. The receiving roller 17 is pivotally supported by a rotating shaft 18 so as to be positioned below the mounting piece 19a projecting to the receiving ring 6 side of the L-shaped angle 19. The rotating shaft 18 is The central axis P4 is supported by the mounting piece 19a so as to be orthogonal to the central axis P1 of the cylindrical screen 5, and the rotary shaft 18 is fixed to the upper side of the mounting piece 19a by a nut N. It has been.

  As shown in FIG. 5, the thrust receiving roller 17 includes a cylindrical screen 5 placed on each of the rollers in an inclined state on the rear side, and a side surface 17a on the rear side surface 6b "of the roller receiving ring 6 on the rear side. To receive and restrict the movement in the thrust direction (the direction of the central axis P1) of the cylindrical screen 5. That is, the cylindrical screen 5 includes the four rotating rollers 14a, 14a ′, 14b, 14b 'is placed and rotated in a state inclined to the rear side, the side surface (outer peripheral surface) 17a of the thrust receiving roller 17 is brought into contact with the side surface 6b "of the ring 6, thereby the cylindrical screen 5 This restricts the movement in the thrust direction. As a result, during the rotation of the cylindrical screen 5, the rear side surface 6 b ″ of the roller receiving ring 6 abuts on the side surface 17 a of the thrust receiving roller 17, so that the movement in the thrust direction is limited. As a result, the roller receiving ring 6 , 6 ′ and the contact between the rotating rollers 14a, 14b, 14a ′, 14b ′, that is, the roller support surfaces 6a, 6a ′ of the roller receiving rings 6, 6 ′, the annular ribs 6b, 6b ′, the annular ring 11, 11 'etc. Moreover, when the thrust receiving roller 17 itself is worn, it can be easily replaced.

  A product conveying conveyor 20 is provided below the cylindrical screen 5 to convey the product dropped from the cylindrical screen 5 forward (in the direction of arrow B) (see FIG. 5). Further, a product transport conveyor 21 is provided on the lower surface of the exit side of the small-diameter cylindrical portion 7 on the rear side of the cylindrical screen 5, and the product discharged from the exit side of the cylindrical screen 5 is laterally (in the direction of arrow C). (Refer to FIG. 2).

  Reference numeral 22 denotes a casing that covers the outside of the cylindrical screen 5 and the like, and includes a screen casing 22 a that covers the entire outside of the cylindrical screen 5, and a rear-side casing that covers the small-diameter cylindrical portion 7 and the conveyor 21 on the rear side of the screen 5. An opening 22a ′ is formed on the front side so as to expose the guide ring 8. The casing 22 has a lower end periphery fixed to the top surface 13a of the frame 13.

  Since the present invention is configured as described above, the operation of the drum screen 1 according to the present invention will be described next.

  It is assumed that the drum screen 1 is installed on the frame 13 in a state of being inclined rearward as shown in FIG.

  In this state, the drive motors M1 and M2 are driven at the same speed in the same direction. Then, the rotating rollers 14a and 14b are simultaneously rotated in the direction of the arrow A ′ via the connecting shaft 16, and the rotating rollers 14a ′ and 14b ′ are simultaneously rotated in the direction of the arrow A ′ via the connecting shaft 16 ′. The rotational force of the rollers 14a, 14b, 14a ′, 14b ′ is transmitted to the roller receiving rings 6, 6 ′ via the roller support surfaces 6a, 6a ′, whereby the cylindrical screen 5 is moved in the direction of arrow A. Rotate.

  Further, due to the rotation of the cylindrical screen 5, the thrust receiving roller 17 rotates in the direction of arrow D (FIG. 3) and restricts the movement of the screen 5 in the thrust direction.

  In this state, when a raw material containing soil, mud or the like is introduced from the raw material inlet 23 in front of the cylindrical screen 5, the raw material is sieved while colliding with the floating rod 2 in the cylindrical screen 5, and the weir plate 12 Soil, mud, etc. are gradually removed while being dammed by, moving toward the exit 24, and stones (product) that can pass through the gap between the floating rods 2, 2 fall down in the process of sieving. Then, it is conveyed in the direction of arrow B by the conveyor 20. Stone larger than the gap between the floating rods 2 and 2 is discharged from the outlet 24 of the cylindrical screen 5 and supplied onto the conveyor 21 via the small diameter cylindrical portion 7 and is conveyed in the direction of arrow C by the conveyor. The

  In the course of such sieving operation, even if the cylindrical screen 5 tries to vibrate or move in the thrust direction (front-rear direction along the central axis P1), the thrust receiving roller 17 restricts the movement in the thrust direction. The cylindrical screen 5 can rotate stably.

  In the above-described embodiment, the configuration in which the four rotating rollers are driven using the two drive motors M1 and M2 is shown. However, the sprockets are provided on the left and right connecting shafts 16 and 16 ', respectively. A chain may be connected, and in this state, only one rotary roller 14a may be driven by a single drive motor M1, so that the four rotary rollers are rotationally driven.

  Thus, in the drum screen 1 according to the present invention, the cylindrical screen 5, each rotating roller, and the drive motors M <b> 1 and M <b> 2 are compactly arranged on the frame 13, and all on the single frame 13. For example, by providing a crawler or the like on the underframe 13, the drum screen itself can be configured to be able to run on its own.

  As described above, according to the present invention, since there is no driving drum portion having the same diameter as the cylindrical screen 5 as compared with the conventional drum screen, the whole can be made compact (small), for example, The drum screen can be provided with mobility by being mounted on a self-propelled crawler.

Further, since the weight of the drum screen can be reduced by reducing the size of the entire drum screen, the required power can be greatly reduced.
In addition, it is possible to realize efficient sieving operation by eliminating the attachment of materials such as soil and mud to the drum portion of the conventional drum screen and the occurrence of reaggregation.

  Further, since the thrust receiving roller 17 can suppress the movement of the cylindrical screen 5 in the thrust direction, wear of the ring due to friction between the rotating roller and the annular roller receiving ring can be suppressed, and the thrust receiving roller 17 can be easily operated. Can be replaced.

  Further, the bearing annular frames 4, 4 'at both ends and the roller receiving rings 6, 6' at both ends can be integrated, and the cylindrical screen 5 can be further downsized.

  Further, by directly connecting the drive shafts of the drive motors M1 and M2 to the rotary shaft of the rotary roller, the drive system of the cylindrical screen 5 can be configured very compactly. It becomes possible to arrange | position on a frame.

  FIG. 9 shows a rod-coated tube 60 with a ring (a rod-coated tube with a ring) 60 and a ring-shaped member 61 for making the screen of the drum screen square (rectangular or square). The ring-equipped rod-coated tube 60 has a rectangular tube shape with a rectangular cross section that can be coated on the outer periphery of the floating rod 2, and one or two ring-shaped members 61 are bonded (or welded) to the outer periphery thereof. ) It is fixed. The rod covering tube 60 has a single length that is shorter than the length of the rod 2, and is configured so that substantially the entire rod 1 can be covered by the three rod covering tubes 60. Yes. The rod cladding tube 60 has a quadrangular cross section, but if the rod cross section is circular, it is configured in a cylindrical shape.

  The ring-shaped member 61 is made of, for example, hard rubber. The overall shape is a disk shape, but a square-shaped opening 61a for inserting a rod cladding tube is provided through the center, and the opening 61a has the opening 61a. By being inserted into the rod cladding tube 60, it is fixed to the cladding tube 60 by adhesion or welding. This ring-shaped member 61 forms two types, one provided at the center of one rod-coated tube 60 and two provided at a predetermined interval on one rod-coated crown 60.

  Each of the rod cladding tubes 60 includes a space between the bearing annular frame 4 ′ on the front side of the drum screen 1 and the intermediate bearing annular frame 3, a space between the intermediate bearing annular frames 3 and 3, and the intermediate bearing annular frame 3 and the rear side. It has a length that can be attached to the rods 2 and 2 at a distance from the bearing annular frame 4 (see FIG. 11).

  11, the ring-shaped members 61 and 61 of the adjacent rods 2 and 2 are configured to form an overlapping portion K where the ring-shaped members 61 and 61 overlap each other when viewed in the axial direction of the rods. (FIG. 12). The diameter of the ring-shaped member 61 is formed so as not to come into contact with the rod cladding tube 60 of the adjacent rod 2 when mounted on the floating rod 2.

  Therefore, in the floating rods 2 and 2 adjacent to each other, the rod cladding tube 60 provided with one ring-shaped member 61 and the rod cladding tube 60 provided with two ring-shaped members 61 are alternately mounted. (FIG. 10), in the rod screen 1, the ring-shaped members 61 are arranged in a zigzag manner (FIG. 11), and in the overlapping portion K, a rectangular sieve mesh S (or a square (square) sieve mesh such as a square sieve mesh is used. ) Can be formed (see FIG. 11). In addition, how many ring-shaped members 61 are provided in one rod cladding tube 60 can be set by the object to be sieved, and a sieve mesh (for example, square sieve mesh) smaller than the embodiment of FIG. 11 is formed. In such a case, more ring-shaped members 61 can be provided on the rod cladding tube 60. A square sieve mesh is also formed between the ring-shaped member 61 and the intermediate bearing annular frame 3.

  In order to mount the rod cladding tube 60 on the rod 2, the cladding tube 60 is arranged in advance at each mounting position before the rod 2 is inserted (FIGS. 10A and 10B), and the bearing on the front side. The rod 2 may be inserted through the bearing hole 9 on the annular frame 4 ′ side. Then, the rod 2 includes a rod cladding tube 60 between the bearing annular frame 4 on the front side and the intermediate bearing annular frame 3, a rod cladding tube 60 between the intermediate bearing annular frames 3 and 3, the intermediate bearing annular frame 3 and the rear side. Are inserted into the rod cladding tube 60 between the bearing annular frame 4 ′ and the protruding shaft 2 ″ at the tip thereof is inserted into the small diameter bearing hole 10 of the horizontal disk 7 a through the bearing hole 9 of the bearing annular frame 4. (See FIGS. 7, 8, and 10) The protruding shaft 2 ″ on the front side of the rod 2 is also inserted into the small-diameter bearing hole 10 of the horizontal disk 8a as shown in FIGS. Supported. The small diameter bearing holes 10 of the horizontal disks 7a and 8a at both ends and the protruding shafts 2 "at the both ends have a gap t as shown in FIG. 8, and the bearings of the rod 2 and the intermediate annular bearing frames 3 and 3 are provided. Since the hole 9 also has a gap, each floating rod 2 can itself vibrate (float) in the range of the gap t even when the rod cladding tube 60 is mounted. The peeling effect of the kimono can be exhibited.

  Thus, by attaching the rod cladding tube 60 to all the floating rods 2 of the drum screen 1, the rectangular sieve mesh S can be formed as shown in FIG.

  Further, since the configuration of the rod 2 and the drum screen 1 is the same as that of the above-described embodiment of FIGS. 1 to 8, the rod 2 has the respective frames 4 ′, 3, and 3 even when the rod cladding tube 60 is mounted. 4 can be rattled (vibrated), and high-quality products can be screened by the square-shaped sieve mesh S. That is, when the cylindrical screen 5 is rotated, an object longer than the square sieve mesh S is not screened out by the square sieve mesh S, and a product of good quality can be sieved.

  When the ring-shaped member 61 is worn, the rod 2 is removed from the front bearing annular frame 4 ′ side, the rod cladding tubes 60 are removed, and a new ring-shaped member 61 is provided. It is only necessary to mount the rod covering tube 60 at a predetermined position, insert the rod 2 again, and cover the outer periphery of the rod 2 at each position. The rod cladding tube 60 can be replaced by, for example, only a part of the rod cladding tube 60 provided with the worn ring-shaped member 61.

  Thus, by attaching the rod covering tube 60 having the ring-shaped member 61 to the rod 2 in a detachable manner, a square sieve mesh can be formed, thereby improving the quality of the product. .

  Further, since the rod cladding tube 60 provided with the ring-shaped member 61 is configured to be attached to or removed from (attached to or detached from) the rod 2, when the ring-shaped member 61 is worn, the rod having the worn ring-shaped member. Only the cladding tube 60 needs to be replaced, and it is not necessary to replace the entire rod 2, so that maintenance is good.

  In addition, since the rod cladding tube 60 covers the rod 2, it can function as a protective material for the rod 2 itself, and the service life of the rod 2 can be improved.

  As described above, by mounting the rod cladding tube 60, it is possible to select a very high quality product while being small in size, and the drum cladding tube 60 can be easily replaced and has a very good maintenance property. A screen can be realized.

  Since the drum screen according to the present invention can be reduced in size, it can be used not only as a fixed drum screen, but also can be mounted on a crawler so that it can run on its own, or can be mounted on a track and moved. This makes it possible to dramatically expand the places of use.

DESCRIPTION OF SYMBOLS 1 Drum screen 2 Floating rod 2 'Fixed rod 2 "Both ends protrusion shaft 4, 4' Bearing annular frame 4b Bearing hole 5 Cylindrical screen 6, 6 'Roller receiving ring 6a, 6a' Roller support surface 6b" Rear side surface 9 Bearing hole 13 Base frames 14a, 14b Rotating rollers 14a ', 14b' Rotating rollers 16, 16 'Connecting shaft 17 Thrust receiving roller 17a Side surface (outer peripheral surface)
18 Rotating shaft 60 Rod cladding tube 61 Ring-shaped member P1 Central axis (common central axis)
P2, P3 Center axis M1, M2 Drive motor

Claims (6)

A pair of bearing annular frames are arranged on a common central axis, a plurality of bearing holes are provided at predetermined intervals in the circumferential direction of each annular frame, and both ends of the rod are loosely inserted into the bearing holes of the both frames. By supporting, a plurality of rods are arranged in a cylindrical shape with the common central axis together to form a cylindrical screen,
A roller receiving ring having the common center axis in common is fixed to the both end bearing annular frame of the cylindrical screen, and each outer peripheral surface of both rings is a roller support surface,
Two rotating rollers, each having a rotating shaft parallel to the tilting direction on a tilted frame, are respectively provided at the left and right positions on the low position side and the left and right positions on the high position side. Connect the rotation center axis to each rotation center axis of the left and right rotation rollers on the high position side by connecting shafts,
A cylindrical screen is installed in an inclined state on the roller by placing each roller support surface of the roller receiving ring on the front and rear rotating wheels of the four wheels,
A thrust receiving roller having a rotation axis orthogonal to the common central axis is rotatably mounted on a lower frame of the cylindrical screen, and an outer peripheral surface of the thrust receiving roller is arranged on the low position side of the roller. Abut the side of the receiving ring,
A drum screen characterized in that the cylindrical screen can be rotated around the common central axis by rotating the rotary shaft of any of the rotary rollers with a drive motor.   2. The drum screen according to claim 1, wherein the roller receiving ring is integrally formed on an outer peripheral surface of the bearing annular frame.   Provided with a drive motor for driving one of the rotating rollers connected to the connecting shaft on one side and a driving motor for driving one of the rotating rollers connected to the connecting shaft on the other side The drum screen according to claim 1 or 2, wherein   The drive shaft of the drive motor is connected to the rotary shaft of the rotary roller, and the four-wheel rotary roller, the thrust receiving roller, and the drive motor are disposed on the frame. The drum screen according to any one of claims 1 to 3. Providing a rod cladding tube capable of covering the outer periphery of the rod and fixing one or more ring-shaped members to the outer periphery of the rod cladding tube;
By covering the rod cladding tube on the outer periphery of each rod, the ring-shaped members in adjacent rods are arranged in a staggered manner, and the ring-shaped members overlap in the axial direction of the rod,
The drum screen according to any one of claims 1 to 4, wherein a square sieve mesh is formed by a ring-shaped member adjacent in the axial direction of the rod.   6. The drum screen according to claim 5, wherein the rod cladding tube can be attached to the outer periphery of the rod from the end of the rod and can be removed from the end of the rod.

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