JP2004100197A - Dust-collecting belt type screen device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust-collecting belt type screen device which prevents development of a crack of a belt screen and deformation of its shaft piece even if operated over a long period of time, greatly easing restrictions posed by the channel width and the depth of an intake, the hydraulic pressure of flowing water, and flow velocity. <P>SOLUTION: The screen device includes a belt type screen 12 constructed of strips and a shaft piece combined and flexibly connected together; a drive sprocket 5 engaging the shaft piece of the screen; a screen frame 1 axially supporting the sprocket; and a lower rotor 10, with the screen stretched between the drive sprocket and the lower rotor. A plurality of elliptic reinforcing plates are arranged in the cross direction of the screen. Belt-receiving rails 15, 16 are positioned on the downstream side face of the screen. The rails with their surfaces made from resin are secured to the frame by respective support members 18, 19. The screen travels endlessly as it is driven by the sprocket for rotation, and foreign matter in flowing water is scooped up thereon. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dust-removing belt-type screen device installed at an intake of a river or a water treatment facility. More specifically, the present invention relates to a dust-removing belt-type screen device that runs a water-permeable screen endlessly and scrapes foreign substances in running water onto the screen.
[0002]
[Prior art]
Conventionally, in order to reduce the load on water treatment and the aesthetics of water areas, a wire mesh belt made of steel wire or a substantially corrugated belt made of a strip was provided at an intake of a river or a water treatment facility. A belt-type screen device was installed, and various impurities such as leaves and branches floating on the water surface and in the water, plastic bottles, vinyl sheets, and the like were collected by scraping with an endless belt, and then disposed of.
As shown in FIG. 9 (A), the dust removing belt for scraping up such contaminants has an appropriate width in which the peaks a and the valleys b are continuously formed by being alternately bent to opposite sides in the length direction. Many strips c are arranged in parallel in the same direction, the peaks a and the valleys b of the adjacent strips c are fitted to each other, and the shaft piece d is inserted through the overlapping portion so as to be flexibly connected. A belt formed on a belt e having a desired length is known (for example, see Patent Document 1). On this belt e, an angle member f for scooping is provided at an appropriate interval.
As shown in FIG. 9B, the belt e as described above is inclined between the sprocket h and the roller i while being inclined downstream with respect to the flow of the river g. A flat bar j is disposed on the upstream rear surface of the belt e without being supported by the main body frame of the lifting device. Then, while rotating the sprocket h in association with the motor k and running the belt e endlessly, the impurities floating on the river g are scraped up by the angle member f, and the impurities are removed from the belt e by the rotation of the separator m. Separate and collect.
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 62-148620
[0004]
[Problems to be solved by the invention]
Since the belt for dust removal is subjected to water pressure due to the flow of water such as a river, the belt is bent. Further, since the width and depth of the water channel of the intake port where the dust removal belt is installed are not always constant, the machine width and the machine length of the endless belt need to correspond to the size of the water channel. However, when the mechanical width and the mechanical length of the conventional endless belt having a substantially corrugated strip are increased, there is a problem that the strip forming the belt is cracked by water pressure.
Moreover, in the conventional endless belt, a flat bar is arranged on the rear surface on the upstream side without supporting the flat bar on the main body frame, and a chain for engaging a driving sprocket is attached to both side edges. Therefore, when the belt is subjected to a water pressure load corresponding to, for example, a flow rate of flowing water of 1 m / sec or more, there is a problem that the bending of both sides of the belt becomes large, and the shaft piece is deformed and a crack is generated in the strip. In addition, there is a problem that the running property of the endless belt deteriorates.
Therefore, an object of the present invention is to prevent the belt-type screen from being cracked or its shaft piece from being deformed even when the belt-type screen is operated for a long period of time. It is an object of the present invention to provide a dust-removing belt-type screen device provided with a screen that can be smoothly moved and that can run smoothly.
[0005]
[Means for Solving the Problems]
The present invention provides a plurality of strips which are alternately bent in the longitudinal direction to opposite sides to form ridges and valleys in a row in the same direction, and the ridges and valleys of adjacent strips are arranged in parallel. A belt-type screen in which a shaft piece is inserted into the overlapped portion and refractively connected to each other, a driving sprocket that engages with the shaft piece of the screen, and a screen frame that supports the sprocket, A lower rotor on which a screen is hung between the drive sprocket and a lower end rotor, and the screen is run endlessly by the rotation drive of the sprocket, and a dust-removing belt-type screen device that scrapes up impurities in running water onto the screen. A long plate in which a plurality of oval reinforcing plates having holes through which the shaft pieces are inserted are interposed in the width direction of the screen, and the surface of which is formed of a resin member or coated with resin. And slidable screen Ranaru belt receiving rails on the downstream side of the screen with respect to the water flow, and characterized in that said rail is fixed to the screen frame through the support member.
In the present invention, a plurality of rectangular plate pieces having claw pieces projecting upward at predetermined intervals are arranged in the width direction on the screen, and these plate pieces are arranged at predetermined intervals in the length direction of the screen. Is established. Further, it is preferable to provide a brush in contact with the surface of the lower end portion in the width direction of the screen located on the upstream side with respect to the water flow.
[0006]
[Action]
In the present invention, since a plurality of oval reinforcing plates having holes through which the shaft pieces of the screen are inserted are interposed in the width direction of the screen, the strength of the shaft pieces constituting the screen is reinforced by the reinforcing plates. For this reason, even if the belt type screen receives a relatively large water pressure due to the flow of water such as a river, it is possible to prevent the occurrence of cracks in the strip due to the bending of the shaft piece. Therefore, the screen area can be increased, and there is no restriction on the width and depth of the water channel of the water intake.
Further, since the belt receiving rail formed of the long plate is disposed downstream of the screen with respect to the water flow and is fixed to the screen frame, it is possible to receive the hydraulic load from the upstream by the rail. For example, if a chain is provided on both sides of the screen without being supported by the frame, the belt type screen can only withstand a flow velocity of flowing water of about 1 m / sec. By fixing to the frame via the interface, there is no functional restriction even if the flow velocity is 3-4 m / sec. That is, since the shaft piece is not deformed, and the surface of the rail is formed of a resin member or a long plate coated with resin, the screen runs smoothly even under a relatively large hydraulic load. .
As described above, the screen device of the present invention can significantly reduce the restrictions on the water channel of the intake port and the flow velocity of the flowing water while preventing the generation of cracks and the like and the deformation of the shaft pieces of the strip constituting the screen. When the endless screen made of a substantially corrugated strip travels freely by the rotation drive of the sprocket, impurities flowing while floating on the water surface of the river and the water are swept up on the screen, and the river and the like are swept up. Water is purified.
[0007]
According to the invention according to claim 2, a plurality of rectangular plate pieces having claw pieces projecting upward at predetermined intervals are arranged in the width direction on the screen, and the plate pieces are predetermined in the length direction of the screen. Since the contaminants are arranged side by side at intervals, the contaminants once scooped up from the water surface do not fall together with the water, and the contaminants can be reliably recovered. Incidentally, in a wire mesh belt formed of a conventional steel wire, there is a problem that small impurities are entangled with the belt and it is difficult to separate the impurities. Further, in the belt to which the angle member for scooping is attached, there is a problem that impurities once scooped and fried, especially leaves of trees and the like, are flushed with the falling water stream.
According to the third aspect of the present invention, since the brush is provided so as to abut on the lower end surface in the width direction of the screen located on the upstream side with respect to the water flow, impurities in the running water are downstream from below the screen. There is no risk of spilling to the side. Further, the nail pieces attached on the screen pass between the lines of the brush, so that the running of the endless screen is not hindered.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail.
The belt screen device for dust removal of the present invention, a belt-type screen is stretched between the driving sprocket and the lower rotor, by rotating the sprocket through a suitable power transmission mechanism from a driving source such as a motor, The screen runs endlessly. A rotary separator brush that is in contact with the lower surface of the screen that is reversingly driven from the driving sprocket is arranged. By rotating and driving the separator brush via the transmission mechanism, contaminants scooped up on the screen are removed. The object is separated from the screen and collected in a suitable container.
The power transmission mechanism includes a belt transmission, a V-belt transmission, a chain transmission, a gear mechanism, and the like for interlocking the output shaft of the driving source with the driving sprocket shaft and the separator brush shaft, and the driving force of the driving sprocket obtained from the driving source is provided. It may be transmitted to the separator brush shaft by similar means. If necessary, a plurality of separator brushes may be provided side by side. In this case, the above-described power transmission mechanism is sequentially connected between the separator brushes. The brush itself, which is mounted radially along the axial direction of the separator brush, is usually arranged symmetrically with respect to the axis.
[0009]
In the screen device of the present invention, the screen stands vertically and the upper portion is bent in the horizontal direction, or the screen is inclined downstream with respect to the water flow, and then continuously bent in the horizontal direction. The rotating body that supports the screen is disposed at the bent portion. The rotating body (rotor) and the lower rotor may be a continuous rotating body or may be divided into a plurality of parts via a spacer.
In the present invention, a belt-type screen formed from the above-described strip and shaft as shown in FIG. 9 is used as a screen from which impurities are scraped. However, the bent shapes of the peaks and the valleys are not limited to the squares shown in FIG. 9 and may be waveforms such as arcs. Such a screen has a size corresponding to the width and depth of the intake channel.
In the width direction of the screen, a plurality of oval reinforcing plates having holes through which the shaft pieces of the screen are inserted are interposed. The reinforcing plates are usually interposed at a plurality of locations at both ends and a center of the screen in the width direction. These reinforcing plates are preferably disposed endlessly continuously in the longitudinal direction of the screen. However, they may be disposed discontinuously in order to reduce the weight and cost of the screen.
Further, in the width direction on the screen, a plurality of rectangular plate pieces having claw pieces protruding upward at predetermined intervals are arranged, and these plate pieces are juxtaposed at predetermined intervals in the length direction of the screen. ing.
[0010]
The driving sprocket is supported on both sides of the screen frame, and is engaged with the shaft so as to sandwich the screen strip on which the reinforcing plate is interposed. Therefore, the load applied to the substantially corrugated portion of the screen can be dispersed to the reinforcing plate, and deformation, cracking, breakage, and the like of the substantially corrugated strip can be suppressed. In addition, the lower rotor other than the driving sprocket, the rotary separator brush, and the rotating body disposed at the bent portion are also supported on both sides of the screen frame.
Further, it is preferable to provide a lower brush in the width direction of the screen located on the upstream side with respect to the water flow, and to contact the lower end of the screen. If a brush is provided in such a portion, unlike a conventional screen device in which the lower portion of the screen is open or a rubber plate is arranged, impurities in flowing water pass below the screen and flow to the downstream side. There is nothing to do. In addition, since the nail pieces mounted on the screen pass between the lines of the lower brush, the endless screen can run smoothly.
The location of the reinforcing plate interposed at the center in the width direction of the screen is not particularly limited as long as it is a position where damage such as cracks does not occur in the strip of the screen receiving the hydraulic load. .
[0011]
In the plate having the claw, the angle of the claw with respect to the plate is preferably upright at 90 ° when the screen is inclined downstream with respect to the water flow, but the angle of the screen with respect to the vertical axis is preferable. Even if it is inclined in the range of 20 ° or less toward the traveling direction, there is no particular problem in the picking up and separation of the foreign substances. When the screen is vertically upright, the angle of the claw is generally inclined toward the running direction of the screen in a range of 45 to 90 °, and is inclined in a range of 60 to 85 °. Is preferred. If the angle is less than 45 °, it is difficult to completely separate impurities by the separator brush rotating in the direction opposite to the running direction of the screen. On the other hand, when the angle is larger than 90 °, it becomes difficult to reliably scrape impurities in the running water onto the screen.
[0012]
When the endless screen with the above-mentioned claw pieces is run and the foreign substances are scraped off from the water surface, unlike the conventional wire mesh belt or the belt attached with the angle member for scooping, the foreign substances are caught by the claw pieces and the water flows. It will not fall. In addition, since the impurities are easily separated from the screen by the rotation of the separator brush, the impurities can be reliably collected.
The plate piece is fixed on the clean side by tightening both sides of the plate piece with a claw piece mounting bolt and a nut. When the plate piece is fixed to the screen using such bolts and nuts, the environment of rivers and water treatment facilities changes, unlike the conventional belt where the contaminant scraping member is firmly fixed by welding etc. Also, it is possible to exchange the plate pieces with nails as needed.
[0013]
On the downstream side of the screen with respect to the water flow, a belt receiving rail formed of a long plate formed of a resin member or covered with a resin on the surface on which the screen slides is disposed in two vertical stages and supports the rail. A plurality of support members are fixed to the screen frame. In addition, an upper rail on which the back surface of the screen slides is also arranged on the upper side of the bent portion of the screen, and a plurality of support members for supporting the upper rail are fixed to the frame. As these support members, pipes, rod-shaped members, plate-shaped members and the like are used. Needless to say, the claw pieces of the plate piece are not arranged in the length direction of the screen at the portion where the lower belt receiving rail is arranged.
In order to improve the sliding of the screen, it is preferable that the rail surface member is made of a resin material having a low friction coefficient. For example, a long plate made of stainless steel may be covered with the resin material.
The friction coefficient of the resin material is preferably 0.3 or less, more preferably 0.2 or less. Examples of such a resin material include nylon, polyimide, polyamideimide, ultrahigh molecular weight polyethylene, polyester, polyacetal, PEEK, and the like. These resins are also excellent in mechanical strength and abrasion resistance. Among the above resins, ultrahigh molecular weight polyethylene (U-PE100, U-PE300: manufactured by Nippon Polypenco Co., Ltd.) and 6 nylon (MC nylon: manufactured by Nippon Polypenco Co., Ltd.) are preferably used.
[0014]
By the way, in the conventional belt in which an angle member is attached as a lifting member, the belt is inclined downstream at an inclination angle of about 30 ° in order to prevent the once-raised contaminants from falling to the water surface. . However, when the inclination angle is small, the installation area of the screen device becomes large.
Therefore, in the dust-removing belt-type screen device of the present invention, when the belt-type screen stands upright and the upper portion is bent in the horizontal direction, as described above, the claw pieces are attached to the plate pieces by 60 to 85. It is desirable to mount the plate piece on the screen while being inclined within the range of °. On the other hand, when the screen is inclined, it is desirable that the screen be inclined downstream at an inclination angle of 45 ° or more and less than 90 ° with respect to the water flow. When the inclination angle is close to 90 °, impurities may fall down as in the case of the conventional belt, and the inclination angle is in the range of 50 to 80 ° in consideration of the relationship with the installation area of the device. , And particularly preferably in the range of 55 to 75 °.
[0015]
【Example】
Next, the present invention will be specifically described with reference to the drawings.
1 and 2, reference numeral 1 denotes a screen frame installed at an intake A of a river. The frame 1 has an inclined portion inclined 60 ° downstream with respect to the water flow and an upper portion bent in the horizontal direction. The sub-frame 1 a laid on the inclined portion constituting the frame main body and the horizontal portion is provided horizontally. And a vertical frame 1c connecting the upper frame 1b and the upper frame 1b. The inclined portion of the frame 1 is supported on the bottom surface of the intake port A, and the upper part is supported on the ground of the intake port A by a plurality of columns 2. A gantry 3 is mounted on the upper surface of the upper frame 1b, and a motor 4 having a speed reduction mechanism is mounted on a motor installation frame 4a fixed to the gantry 3.
Shafts 5a, 6a are supported between both sides of the upper portion of the frame 1 via bearings, and a plurality of drive sprockets 5 and rotary separator brushes 6 are fixed to the shafts 5a, 6a, respectively. Sprockets 4c and 5b are fitted to ends of the output shaft 4b and the sprocket shaft 5a of the motor, and sprockets 5c and 6b are fitted to ends of the sprocket shaft 5a and the separator brush shaft 6a. , 5b and sprockets 5c, 6b are wound with chains 7, 8, respectively. Accordingly, the sprocket 5 and the separator brush 6 are simultaneously rotated with the rotation of the motor 4. The shafts 4b, 5a, 6a, the sprockets 4c, 5b, 5c, 6b and the chains 7, 8 are covered with a cover 9 so as not to directly touch humans.
[0016]
A rotating shaft 10a of the lower rotor 10 is supported via bearings between both sides of the lower portion of the frame 1, and a supporting rotor 11 for supporting the rotating shaft 10a is provided in the bent portion of the frame 1, specifically, below the bent portion of the screen. Then, the belt type screen 12 is stretched between the rotor 10 and the driving sprocket 5.
On the screen 12, a plurality of plate pieces having claw pieces 13 projecting upward are attached at predetermined intervals in the width direction and the length direction of the screen 12, and contaminants in running water when the screen 12 is running. Is scraped on the screen 12. A baffle plate 14 is provided on the lower side of the separator brush 6 to prevent foreign substances scraped up by the claw pieces 13 from scattering around.
[0017]
A plurality of rows of front rails 15 and back rails 16 as belt receiving rails are arranged in two rows in the length direction of the inclined portion of the frame 1, and a plurality of rows of upper rails 17 are arranged in the upper bent portion of the frame 1. The screen 12 slides on these rails 15 to 17. FIG. 2 shows five front rails 15. The front rail 15 is located upstream with respect to the water flow, and the back rail 16 is located downstream with respect to the water flow. In the front rail 15 and the back rail 16, the upper surface on which the screen 12 slides is made of a resin surface member.
The front rail 15 is supported by a plurality of fixed pipes 18 laid between both sides of the frame 1, and these pipes 18 constitute a part of the screen frame 1. The back rail 16 and the upper rail 17 are respectively supported by a plurality of fixed pipes 19 and 20 laid between both sides of the frame 1.
The lower baffle plate 21 is arranged on the bottom surface of the water intake A, and is attached between both sides of the frame 1. A lower brush 22 is provided via the baffle plate 21, and the brush 22 abuts on the lower end surface in the width direction of the screen 12 located on the upstream side with respect to the water flow.
[0018]
Further, details of the dust-removing belt type screen device shown in FIGS. 1 and 2 will be described with reference to FIGS.
As shown in FIG. 4, the belt-type screen 12 has a large number of strips 23 formed alternately in the length direction and alternately bent in the opposite direction to form ridges 23a and valleys 23b in parallel in the same direction. Then, the crests 23a and the valleys 23b of the adjacent strips are fitted to each other, and the shaft piece 24 is inserted through their overlapped portions to be flexibly connected to each other to form an endless screen formed to a predetermined length. Become. At both ends of the shaft piece 24, a retaining member 25 having a larger diameter than the shaft piece 24 is fixed so that the band plate 23 does not come off.
[0019]
An oval reinforcing plate 26 that is slightly longer than the height of the peak 23a is interposed between the retaining member 25 fixed to both ends of the shaft piece 24 and the outermost strip 23 in the width direction. The reinforcing plate 26 has two holes 26a through which the adjacent shaft pieces 24 are inserted, and one end of two different reinforcing plates 26 is overlapped and the position of the hole 26a is shifted. Shaft piece 24 is inserted. The hole 26a is an elongated hole in which the longitudinal direction of the reinforcing plate 26 is elongated so that the shaft piece 24 can be loosely fitted therein so as to be able to cope with a change in water pressure applied to the screen 12.
In addition, a plurality of the reinforcing plates 26 described above are interposed between the band plates 23 at appropriate intervals also at a central portion in the width direction of the screen 12 that receives a hydraulic load. In this case, the two reinforcing plates 26 are arranged at positions facing each other, and one shaft piece 24 is inserted in a sandwich state in which the end of one reinforcing plate 26 is shifted at the position of the hole 26a. That is, one shaft piece 24 passes through the holes 26a of the three reinforcing plates.
In this way, the reinforcing plates 26 interposed at both ends and the center in the width direction of the screen 12 are arranged in a plurality of rows continuously and endlessly in the length direction of the screen 12 as shown in FIG.
[0020]
As shown in FIG. 5, on the belt type screen 12, a plate 27 having the claw 13 protruding upward at a predetermined interval is attached. The plate pieces 27 are formed in a slender rectangular shape, and are attached at predetermined intervals in the width direction of the screen 12 and are arranged at predetermined intervals in the length direction. The claw piece 13 stands upright with respect to the plate piece 27.
The plate piece 27 is fixed on the screen 12 by directing a nut to the screen back surface, inserting and inserting a nail attachment bolt 28 through holes formed on both sides of the plate piece on the screen front side.
[0021]
In FIG. 3, reference numeral 29 denotes an elongated hole slightly wider than the diameter of the sprocket shaft 5a. When the screen 12 is tightened by adjusting the distance between the shaft 5a and the frame 1 using a take-up bolt described later. , The shaft 5a moves rightward in the drawing along the elongated hole 29.
The separator brush 6 is formed by holding a brush 6d between a pair of separator seats 6c fixed in the axial direction over substantially the entire length of the shaft 6a, and tightening the seat 6c with a brush mounting bolt 6e. FIG. 3 shows an example of the separator brush 6 in which the brushes 6d cross in a cross shape. Reference numeral 30 denotes an elongated hole slightly wider than the diameter of the separator brush shaft 6a, and is provided to tension the chain 8 using a take-up bolt. The shaft 11a of the support rotor 11 is supported between both sides of the frame 1.
[0022]
The upper surfaces of the front rail 15 and the back rail 16 which receive the downstream side surface of the screen 12 are formed of rail surface members 15a and 16a made of ultra-high molecular weight polyethylene having an inverted L-shaped cross section. Each of the rail surface members 15a and 16a is fixed to and integrated with a stainless steel rail body (long plate) with a plurality of screws 15b and 16b, respectively. The upper surface of the upper rail 17 is formed of a 6 nylon resin rail surface member 17a having an inverted L-shaped cross section. The rail surface member 17a is similarly fixed to and integrated with the rail body with a plurality of rail mounting bolts 17b.
In the rotor 10 shown in FIG. 3, spacers 10b and rotors are alternately connected. The baffle plate 21 and the brush 22 that abuts on the lower end of the screen 12 sandwich the upper and lower ends of the brush 22 with a front-side mounting seat 31a and a back-side mounting seat 31b. It is fixed by fastening in the width direction with the brush mounting bolt 33.
[0023]
In the screen device as described above, the belt type screen 12 is inclined to the downstream side with respect to the water flow, and faces the intake port A in a state where its lower part is immersed below the water surface. When the motor 4 of the apparatus is driven to rotate the sprocket 6, the endless screen 12 travels in the direction of the arrow, and at the same time, the separator brush 6 also rotates. Since the screen 12 is provided with the oval reinforcing plate 26 in the width direction and the length direction, the shaft piece 24 constituting the screen 12 is prevented from bending even when subjected to the water pressure due to the water flow. Moreover, since the screen 12 slides on the resin front rail 15 and the rear rail 16 having a low friction coefficient, and further on the upper rail 17, the screen 12 runs smoothly on these rails 15 to 17.
When foreign matter floating in running water comes into contact with the running screen 12, the foreign matter is caught by the nail pieces 13 and is scooped up on the screen 12. At this time, since the lower baffle plate 21 is disposed on the bottom surface of the water intake A and the lower brush 22 is in contact with the lower end of the screen 12 in the width direction, impurities do not flow to the downstream side. Further, since the claw pieces 13 pass between the lines of the lower brush 22, there is no hindrance to the running of the endless screen 12.
The scraped-up impurities reach the horizontal portion of the screen 12, are inverted therefrom, and are separated from the screen 12 by the rotational force of the separator brush 6. A part of the separated foreign matter falls downward while colliding with the baffle plate 14 for preventing scattering, and is collected in an appropriate container prepared on the ground of the water intake A.
[0024]
Further, another belt type screen device for dust removal according to the present invention will be described with reference to FIGS. The same components as those described with reference to FIGS. 1 to 5 are denoted by the same reference numerals, and redundant description will be avoided.
6 and 7, the screen frame 1 is vertically upright and the upper part is bent in the horizontal direction. The gantry 3 is attached to the upper surface of the frame 1, and a transmission mechanism such as a motor mounted on the gantry 3 is omitted. The present screen device also has the same transmission mechanism. Elongated holes 29 through which both ends of the drive sprocket shaft 5a are inserted are formed on both sides of the upper portion of the frame 1. The take-up bolt 41 connected to the shaft 5a is moved to the right in FIG. After that, bearings (not shown) that support both ends of the shaft 5 a are fixed to the frame 1.
Further, two rotary separator brushes 6 whose outer peripheral portions are in contact with the lower surface on the lower side of the horizontal portion of the screen 12 are arranged in parallel. Further, the support rotor 11 is disposed below the bent portion of the screen 12.
[0025]
The front rail 15 and the back rail 16 which receive the downstream side surface of the screen 12 are made of ultra-high molecular weight polyethylene on the surface similarly to that shown in FIG. In the upper rail 17, the rail surface member 17a made of 6 nylon resin is integrated with a stainless steel rail main body with a screw 17c. The lower rotor 10, the lower baffle plate 21 and the lower brush 22 are the same as those of the screen device shown in FIGS.
On the front and rear surfaces of the frame 1, a double door opening type front inspection door 42 and a rear inspection door 43 are provided. A hinge 44 is attached to the frame cover 45 on the side of the rear inspection door 43, and a handle 43a is attached to the other side. The front inspection door 42 has the same structure, and the handle 42a is shown in FIG. A chute 46 is arranged at the lower end of the cover 45 along the axial direction of the separator brushes 6, 6. The contaminants separated from the screen 12 by the rotation of the separator brushes 6 and 6 pass through the inside of the chute 46, fall downward, and are collected in an appropriate container prepared on the ground of the water intake A.
[0026]
On the belt type screen 12, a plate piece 27 having a claw piece 47 protruding upward is attached. The claw piece 47 is inclined toward the running direction of the screen 12 at an angle of 75 ° with respect to the plate piece 27.
In the dust-removing belt-type screen device shown in FIGS. 6 to 8, since the raised portions of the screen 12 are vertically upright, the claw pieces 47 arranged on the screen 12 at predetermined intervals in the width direction thereof are used. Since it is slightly inclined in the running direction, impurities in running water can be reliably scraped on the screen 12 in the same manner as the belt type screen device described above.
In each of the dust-removing belt-type screen devices shown in FIGS. 1 to 3 and FIGS. 6 to 8, depending on whether the raising portion of the screen 12 is inclined or upright, Except for this point, it is possible to add one component to the other device or to change each component mutually, except for the angle of the claw 47.
[0027]
【The invention's effect】
According to the dust-removing belt-type screen device of the present invention, the strength of the shaft piece constituting the screen is reinforced by the oval-shaped reinforcing plate. Since the bending of the shaft piece can be prevented, it is possible to prevent the occurrence of cracks and the like in the strip constituting the screen. In addition, there is an advantage that there is no restriction on the width and depth of the intake channel.
Furthermore, since the belt receiving rail that contacts the screen surface on the downstream side with respect to the water flow is disposed via the support member, even if the screen receives a relatively strong hydraulic load from the upstream side, it can be received by the rail. In addition to the fact that the shaft piece that forms the screen is not deformed, the screen can run smoothly because the rail surface is formed of resin. Therefore, restrictions on the water pressure and the flow velocity of the flowing water are greatly reduced.
[Brief description of the drawings]
FIG. 1 is a side view of a belt type screen device for dust removal showing one embodiment of the present invention.
FIG. 2 is a front view of FIG.
FIG. 3 is a sectional view of a main part of FIG.
4A and 4B show an example of a belt-type screen according to the present invention, wherein FIG. 4A is a front view and FIG. 4B is a side view.
5A is an enlarged plan view of a main part of a belt-type screen to which a plate having nails shown in FIG. 1 is attached, and FIG. 5B is a longitudinal sectional view of the plate;
FIG. 6 is a side cross-sectional view of a dust-removing belt-type screen device showing another embodiment of the present invention.
FIG. 7 is a rear view of FIG. 6;
FIGS. 8A and 8B are enlarged views of a belt-type screen to which a plate having nails shown in FIG. 6 is attached, wherein FIG. 8A is a plan view and FIG.
FIG. 9A is a front view of a main part of a conventional belt type screen, and FIG. 9B is a side view of the screen device showing a use state thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Screen frame, 5 ... Drive sprocket, 6 ... Rotary separator brush, 10 ... Lower rotor, 11 ... Support rotor, 12 ... Belt type screen, 13 ... Claw Pieces, 15, 16: Front and back rails (belt receiving rails), 18, 19: Fixed pipe (support member), 22: Lower brush, 23: Strip, 23a: Mountain Part 23b Valley part 24 Shaft piece 26 Reinforcement plate 26a Hole 27 Plate piece 47 Claw piece A Water intake.

Claims (3)

A number of strips that are alternately bent in the length direction to the opposite side to form ridges and valleys in a row are arranged in parallel in the same direction, and the ridges and valleys of adjacent strips are fitted to each other. A belt-type screen in which a shaft piece is inserted through the overlapped portion so as to be freely bent, a driving sprocket engaged with the shaft piece of the screen, a screen frame that supports the sprocket, and a driving sprocket. A dust removal belt-type screen device that has a lower rotor between which a screen is hung, and drives the screen endlessly by the rotation drive of a sprocket to scrape up impurities in running water onto the screen. A plurality of oval reinforcing plates having holes to be inserted are interposed in the width direction of the screen, and a long plate whose surface is formed of a resin member or covered with a resin is formed. The door receiving rail arranged on the downstream side of the screen with respect to the water flow and slidable screen, and the rail is dust belt type screen apparatus characterized by being fixed to the screen frame through the support member. A plurality of rectangular plate pieces having claw pieces projecting upward at predetermined intervals are arranged in the width direction on the screen, and the plate pieces are juxtaposed at predetermined intervals in the length direction of the screen. The screen device according to claim 1, wherein The screen device according to claim 1, further comprising a brush that abuts on a surface of a lower end portion in a width direction of the screen positioned upstream with respect to the water flow.

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