JP4444945B2 - Horizontal scraping dust remover - Google Patents

Description

  The present invention relates to a lateral scratch type dust remover.

Conventionally, multiple rotating disk type screens formed by skewing disks to a rotating shaft at a constant pitch are arranged side by side so that adjacent screen disks are inserted between the disk gaps of the screens. There is a water intake debris prevention device using a multi-rotation disc type screen in which a rotation driving means is arranged so that the rotation direction of the screen is the water flow direction (see Patent Document 1).
JP-A-8-151622

  However, in Patent Document 1, since a perfect circular (single circular arc) disk is used, dust trapped by the rotationally driven disk becomes slipped at the outer peripheral edge of the disk, and the screen It was very difficult to feed the ink to a predetermined position, and the screen could be clogged.

  The present invention has been made to solve the above problems, and provides a side-scraping type dust remover that does not cause clogging of the screen by scraping in the direction of water flow while scraping the trapped dust. It is for the purpose.

In order to solve the above problems, the present invention provides a plurality of sheets in which two arcs are combined to form a substantially tree-like outer periphery in plan view, or three arcs are combined to form a substantially triangular outer periphery in plan view . A screen unit is provided in which a plate-like rotary rake is fixed to the rotary shaft at a predetermined interval in the axial direction. A plurality of screen units are arranged side by side in the water flow direction, and each screen unit rotates adjacent to each other. The outer peripheral edges of the rake face each other so as not to generate a gap in the water flow direction, and are rotated synchronously at the same speed in the same direction .

As in claim 2 , crank arms are respectively fixed to the upper end portion and the lower end portion of the rotary shaft, and the upper crank arm and the lower crank arm are connected in series by connecting links on each side, It is preferable that each of the rotating shafts be rotated in synchronization by rotating the crank arm with an electric motor.

As in claim 3 , it is preferable that the upper crank arm and the lower crank arm have a phase shifted around the axis.

According to a fourth aspect of the present invention, it is preferable to provide a comb-shaped scraper that is provided between the screen units at the most upstream position and the most downstream position between the vertical intervals of the rotary rake.

According to the present invention, the plate-like rotary rake of the screen unit is formed by combining a plurality of arcs to form the outer peripheral edge, so it is not a perfect circle as in the background art, but rotates while standing up in the rotation direction. The dust trapped by the rotating rake is scraped in the direction of water flow while being sequentially scraped by the rising rotating rake, thereby eliminating the possibility of clogging the screen. In addition, since the rotating rakes are arranged straight, there is no gap in the direction of water flow between the outer peripheral edges of adjacent rotating rakes, so there is a risk of dust getting caught in the gaps or entering the water intake through the gaps. Disappears.

Furthermore, the rotary rake can be easily formed by a press or the like. In addition, the angle between which the dust trapped between the adjacent rotating rakes is gradually increased as the rotation angle is increased, so that it can be scraped smoothly without being caught.

According to claim 2 , the screen unit can be easily synchronized (synchronized) with the crank arm and the connecting link, so that a complicated and expensive synchronized rotation mechanism such as a sprocket wheel, a chain, or a gear is unnecessary. Become.

According to the third aspect , since the phases are shifted around the axes of the upper and lower crank arms, the dead point can be easily passed by either the upper or lower crank arm, so that only one electric motor is used. Thus, the upper and lower crank arms can be driven smoothly.

According to the fourth aspect , since the comb-shaped scraper is provided in the screen unit at the most upstream position and the most downstream position, the dust scraped in the water flow direction while being scratched by the rotating rake is caused by the water flow from the position of the scraper. Naturally it will be swept downstream.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view of a side-scraping dust remover 1 installed at an inlet portion of a water intake, etc., FIG. 2 is a side view of FIG. 1, and FIG. 3 (a) is a plan view of FIG. 3B is a cross-sectional view taken along line AA in FIG. 1, FIG. 4A is an enlarged view of a portion B in FIG. 3B, and FIG. 4B is an enlarged view of a portion C in FIG. FIG. 4C is an enlarged view of the crank portion, and FIG. 5 is an enlarged cross-sectional view of the drive portion.

  The horizontal scraping type dust remover 1 is configured in a horizontally long rectangular frame shape with an upper frame 2A, a lower frame 2B, a side frame 2C on the upstream side in the water flow direction D, and a side frame 2D on the downstream side in the water flow direction D. A frame 2 is provided.

  In this frame 2, the lower frame 2B is fixed to the water bottom such as the inlet portion of the water intake, and the side frames 2C and 2D are fixed to the column members 3A and 3B provided upright on both sides of the inlet portion and the like of the water intake. Thus, in combination with the upper frame 2A, a horizontally-long rectangular frame-shaped water intake opening is formed at the inlet portion of the water intake. Depending on the width size of the inlet portion of the water intake and the like, as shown in FIG. 1, a similar side-scraping type dust remover 1 may be connected to the downstream side of the column member 3B on the downstream side.

  The screen unit 5 to which the frame 2 is attached is provided with a rotary shaft 6 extending in the vertical direction. As shown in FIG. In this example, 32 rake rakes 8 are fixed at a predetermined interval T in the axial direction.

  The rotating rake 8 is not a perfect circular disk as in the background art but is a deformed rotating plate, and an outer peripheral edge is formed by combining a plurality of arcs.

  For example, the plate-shaped rotating rake 8 has a configuration in which two arcs s and t are combined as shown in FIG. 9A to form a substantially tree-like shape in plan view, or three pieces as shown in FIG. The arcs u, v, and w can be combined to form a substantially triangular shape in plan view.

  In the case of a substantially tree-like configuration as shown in FIG. 9A, the inter-axis distance W of the rotary shaft 6 is 1 (for example, the actual dimension is 400 mm), and the radius R1 [1 / √2 = 0. 0.0701 (for example, the actual dimension is 283 mm)] and a radius R2 [1-1√2 = 0.2929 (for example, the actual dimension is 117 mm)] By combining two circular arcs of radius 1 (R5) in contact with the circle of radius R2, centering on a bisecting position on the circumference, a substantially tree-like shape is formed.

  In the case of a substantially triangular configuration as shown in FIG. 10, the distance R between the rotation shafts 6 is set to 1 (for example, the actual dimension is 400 mm), and the radius R3 [1 / √3 = 0.5774 ( For example, the actual dimension is 231 mm.)] And a radius R4 [1-1√3 = 0.4226 (for example, the actual dimension is 169 mm)] are drawn on the circumference of the circle with the radius R3. By combining three arcs having a radius 1 (R6) in contact with a circle having a radius R4 with the three-divided position as the center, a substantially triangular shape is formed.

  As shown in FIG. 1, a plurality (10 in this example) of screen units 5 are arranged side by side with a certain interval (interaxial distance W) in the water flow direction with respect to the frame 2 and are used for dust removal as a whole. Configure the screen.

  Specifically, as shown in FIG. 5, bearings 10 are fixed inside the upper frame 2 </ b> A and the lower frame 2 </ b> B, and the upper end 6 a and the lower end 6 b of the rotating shaft 6 are perpendicular to the upper and lower bearings 10. It is supported rotatably.

  Then, as shown in FIG. 3B, the rotating shaft 6 is set so that the adjacent rotating rakes 8 are 90 degrees out of phase from the upstream side to the downstream side. As a result, the outer peripheral edges of the adjacent rotating rakes 8 face each other so that there is no gap in the water flow direction.

  In this state, the upper crank arm 11A is fixed to the upper end portion 6a of the rotating shaft 6 with a key or the like in the same direction, and the lower crank arm 11B is fixed to the lower end portion 6b with the key or the like in the same direction. In this case, the upper crank arm 11A and the lower crank arm 11B are fixed to the rotary shaft 6 so that the phase is shifted by 90 degrees (see reference θ) around the axis as shown in FIG.

  The upper crank arm 11A and the lower crank arm 11B are connected in series to the connecting links 12A and 12B on each side by a pin 13. Further, an electric motor 15 with a speed reducer is installed on the upper frame 2A where the rotary shaft 6 at a substantially intermediate position in the water flow direction is located, and the crank arm 15b of the output shaft 15a and the upper crank of the rotary shaft 6 at a substantially intermediate position. The arm 11A is connected to the arm 11A by a long pin 13 through a connecting link 12A.

  As a result, when the electric motor 15 is driven, the rotational force is transmitted from the crank arm 15b of the output shaft 15a to the crank arm 11A on the upper side of the rotary shaft 6 at a substantially intermediate position via the pin 13, and the other via the connecting link 12A. The rotational force is transmitted to the crank arm 11A on the upper side of the rotary shaft 6 at the position, so that all the rotary shafts 6 are synchronized (synchronized) in the same direction and at the same speed (see arrow r in FIG. 9A). Will come to be.

  In addition, since the lower crank arms 11B of all the rotating shafts 6 are also connected by the connecting links 12B by the pins 13, all the rotating shafts 6 are synchronized (synchronized) over the entire length without twisting or the like. It becomes like this.

  As shown in FIGS. 4 (a) and 4 (b), comb-shaped scrapers 16 are provided for the screen unit 5 at the most upstream position and the most downstream position. ing. Each scraper 16 covers a gap between the side frames 2C, 2D and the rotary rake 8, and dust is prevented from entering the water intake through the gap.

  Next, the operation of the rotary rake 8 will be described with reference to FIGS. As shown in FIG. 6A, it is assumed that there is dust at the position of the symbol a of the rotary rake 8-1 of the two screen units 5 upstream of the screen unit 5 at the most downstream position where the scraper 16 is provided. The rotation angle of the rotating rake 8-1 at the start is set to 0 degree.

  As shown in FIG. 6B, when each of the rotating rakes 8-1 to 8-3 rotates in the counterclockwise direction up to 22.5 degrees, the position of the symbol b is rotated by the rotating rake 8-1 that does not rise in the rotating direction. The dust is scraped away.

  Further, as shown in FIG. 6 (c), when each of the rotary rakes 8-1 to 8-3 rotates synchronously to 45 degrees, dust is pushed out to the position of symbol c by the rotary rake 8-1, and FIG. 7 (a). When the rotary rakes 8-1 to 8-3 rotate synchronously to 67.5 degrees as shown in FIG. 7, dust is pushed out to the position of the symbol d by the rotary rake 8-2, and as shown in FIG. When the rotating rakes 8-1 to 8-3 rotate synchronously to 90 degrees, dust is scraped to the position of the symbol e by the rotating rake 8-2, and as shown in FIG. When 8-3 is rotated synchronously by 112.5 degrees, the dust is scraped to the position of the symbol f by the rotary rake 8-2.

  Then, in the screen unit 5 at the most downstream position, as shown in FIG. 8A, when each of the rotating rakes 8-1 to 8-3 rotates synchronously to 202.5 degrees, the rotating rake 8-3 causes a scraper of reference g. As shown in FIG. 8B, when the rotary rakes 8-1 to 8-3 rotate synchronously to 270 degrees as shown in FIG. 8B, the rotary rake 8-3 causes the scraper 16 having the symbol h to move. When the rotary rakes 8-1 to 8-3 rotate synchronously to 292.5 degrees as shown in FIG. 8C, the dust is laterally scraped at the position of the scraper 16 with the symbol i. However, it comes off from the outer periphery of the rotating rake 8-3.

  When the side-scraping dust remover 1 is not driven, the rotating shaft 6 is normally stopped at a position where the rotation angle of the rotary rake 8 as shown in FIG.

  In the case of the side-scraping dust remover 1 as described above, the rotating rake 8 of the screen unit 5 is formed by combining a plurality of arcs to form an outer peripheral edge. Since it rotates while rising in the direction, the dust trapped by the rotating rake 8 is scraped in the direction of water flow while being sequentially scratched by the rising rotating rake 8, and there is no possibility that the screen will be clogged.

  Further, as shown in FIG. 9, the rotating rake 8 has a substantially leaf-like shape in plan view by combining two arcs, so that the rotating rake 8 can be easily formed by pressing or the like. Further, as shown in FIG. 10, the rotating rake 8 may be formed in a substantially triangular shape by combining three arcs in plan view, and in this case, the rotating rake 8 can be easily formed by a press or the like.

  Thus, if two arcs are combined to form a substantially tree-like rotating rake 8 in a plan view (the same applies to a substantially triangular rotating rake 8 in a plan view by combining three arcs), FIG. As shown in FIGS. 7A to 7A, the angle α between which the dust traps sandwiched between the adjacent rotary rakes 8 is increased as the rotation angle increases, that is, the rotation angle in FIG. When the rotation angle is about 40 degrees, when the rotation angle of FIG. 6B is 22.5 degrees, it is about 45 degrees, when the rotation angle of FIG. 6C is 45 degrees, it is about 70 degrees, and FIG. ) Is gradually increased to about 90 degrees when the rotation angle is 67.5 degrees, it can be smoothly scraped without being bitten.

  Further, since the rotary rake 8 has a straight arrangement in which the outer peripheral edges of the adjacent rotary rakes 8 are opposed to each other so as not to generate a gap in the water flow direction, a gap in the water flow direction is provided between the outer peripheral edges of the adjacent rotary rakes 8. Therefore, there is no risk of dust getting caught in the gap or entering the water intake through the gap.

  Further, since the screen unit 5 can be easily synchronized (synchronized) with the crank arms 11A and 11B and the connecting links 12A and 12B, a complicated and expensive synchronized rotation mechanism such as a sprocket wheel, a chain, or a gear is provided. It becomes unnecessary.

  Further, since the phases are shifted around the axes of the upper and lower crank arms 11A and 11B, the dead point can be easily passed by either the upper or lower crank arm 11A or 11B, so that one electric motor Only 15 can drive the upper and lower crank arms 11A, 11B smoothly.

  Further, since the comb-like scraper 16 that enters between the vertical intervals of the rotary rake 8 is provided for the screen unit 5 at the most downstream position, the screen unit 5 was scraped in the water flow direction while being scratched by the rotary rake 8. The dust is naturally pushed downstream from the position of the scraper 16 by the water flow.

  In the above-described embodiment, the rotating rake 8 has a straight (parallel) arrangement in which the outer peripheral edges of adjacent rotating rakes 8 are opposed to each other so as not to generate a gap in the water flow direction, as shown in FIG. 9B. In addition, the rotary rake 8 can achieve the same effects even when the wrap (staggered) arrangement is made such that the outer peripheral edges of the adjacent rotary rakes 8 are overlapped in the vertical direction. The inter-axis distance W of the rotary shaft 6 is, for example, 400 mm in the actual dimension in the straight arrangement in FIG. 9A, but is 360 mm in the actual dimension in the lap arrangement in FIG. 9B, for example. Just do it.

It is a front view of a side-scraping type dust remover according to an embodiment of the present invention. It is a side view of FIG. (A) is a top view of FIG. 1, (b) is the sectional view on the AA line of FIG. (A) is the B section enlarged view of FIG.3 (b), (b) is the C section enlarged view of FIG. 1, (c) is an enlarged view of a crank part. It is an expanded sectional view of a drive part. (A)-(c) is explanatory drawing of the relationship between the rotating rake between 0 degree-45 degree | times, and dust. (A)-(c) is explanatory drawing of the relationship between the rotational rake between 67.5 degree | times and 112.5 degree | times, and a refuse. (A)-(c) is explanatory drawing of the relationship between a rotary rake between 202.5 degree | times and 292.5 degree | times, and a refuse. (A) is a top view of the leaf-like rotation rake of the substantially tree of straight arrangement | positioning, (b) is a top view of the leaf-like rotation rake of the substantially tree of lap arrangement | positioning. It is a top view of a substantially triangular rotation rake.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side-scraping type dust remover 2 Frame 5 Screen unit 6 Rotating shaft 8 Rotating rake 11A, 11B Crank arm 12A, 12B Connection link 15 Electric motor 12b Crank arm 16

Claims (4)

A plurality of plate-shaped rotating rakes having a substantially tree-like shape in a plan view by combining two arcs or a substantially triangular outer periphery in a plan view by combining three arcs are arranged at predetermined intervals in the axial direction. A screen unit is provided which is fixed to the rotating shaft with a space therebetween, and a plurality of screen units are arranged side by side in the water flow direction. In each screen unit, there is a gap in the water flow direction between the outer peripheral edges of adjacent rotating rakes. A side-scraping type dust remover that is faced so as not to rotate and rotated in the same direction and at the same speed . Crank arms are respectively fixed to the upper end portion and the lower end portion of the rotating shaft, and the upper crank arm and the lower crank arm are connected in series by connecting links on each side, and either crank arm is connected by an electric motor. The horizontal scraping dust remover according to claim 1 , wherein each rotating shaft is rotated synchronously by rotating. The side scraper type dust remover according to claim 2 , wherein the upper crank arm and the lower crank arm are shifted in phase around an axis. The comb-tooth-shaped scraper which penetrates between the space | intervals of the up-down direction of a rotary rake is provided with respect to the screen unit of the most upstream position and the most downstream position, The any one of Claims 1-3 characterized by the above-mentioned. The side-scraping dust remover described in 1.

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