JP2021031852A - Screen rotary dust remover - Google Patents

Abstract

To provide a screen rotary dust remover which can be installed in a limited narrow space and can prevent generation of great vibration/noise following an operation.SOLUTION: The screen rotary dust remover in which a screen unit 1 takes a basic attitude along a chain 3 on a front side and the screen unit 1 takes an open attitude having an angle to the chain 3 running a chain guide 31 following oscillation on a backside, is configured such that control rollers 14, 15 are provided to the ends of the screen unit 1, control roller guides 32 for guiding the control rollers 14, 15 are provided to the lateral side of the screen unit 1, deviation parts 33 are provided to the upper and bottom parts of the backside in the control roller guides 32, the control guides 14, 15 are guided to the deviation parts 33 of the control roller guides 32, and the screen unit 1 changes from the basic attitude to the open attitude, and returns to the basic attitude after movement by a fixed distance.SELECTED DRAWING: Figure 1

Description

The present invention relates to a screen rotary dust remover that captures and removes dust called residue in water flowing in a water channel in a water supply or sewerage treatment facility.

As a screen rotary dust remover, as shown in FIG. 7, in Patent Document 1 below, a movable screen 51 for catching fine dust and a rake 52 for catching dust such as a vinyl sheet are circulated and rotated by endless chains 53 on both sides. Those supported to do so are listed.

In this dust remover, the movable screen 51 and the rake 52 rise on the front side facing upstream of the water channel, the dust is scraped up above the water surface, and the movable screen 51 and the rake 52 pass through the gently sloping portion reaching the top. When it begins to descend, dust falls off from the movable screen 51 and the rake 52 and is discharged. Then, the movable screen 51 and the rake 52 that descend on the back side facing the downstream side of the water channel reach the vicinity of the bottom of the water channel, and the operation of wrapping around to the front side is repeated.

In such a rotary dust remover, fine dust that has passed through the movable screen 51 on the front side stays between the movable screen 51 on the front side and the movable screen 51 on the back side without passing through the movable screen 51 on the back side. However, it may interfere with driving.

As a screen rotary dust remover that solves the above problems, in Patent Document 2 below, as shown in FIG. 8, a plurality of comb-shaped screen units 61 are arranged in the circulation rotation direction, and are endless on the sides. Described are those which are connected to a chain 62 and each screen unit 61 swings about a rotation shaft 63 at one end with respect to the chain 62.

In this dust remover, the screen unit 61 that rises on the front side facing the upstream of the water channel takes a basic posture along the chain 62, the adjacent screen units 61 overlap each other, and the dust captured by the screen unit 61 is released from the water. It is scraped up above the surface of the water. When the screen unit 61 passes through the top, it is inverted by its own weight around the rotation shaft 63, and the dust that has fallen from the screen unit 61 is discharged to the outside of the machine by the lower conveyor 64.

After that, the screen unit 61, which was in a horizontal posture at an angle with respect to the chain 62 due to the reversal, descended on the rear side facing the downstream of the water channel, and the space between the adjacent screen units 61 was opened in a side view. Become. Therefore, the fine dust that has passed through the screen unit 61 on the front side does not stay between the screen unit 61 on the front side and the screen unit 61 on the back side, but is flowed to the downstream side together with the water flow.

Japanese Unexamined Patent Publication No. 8-113930 Japanese Unexamined Patent Publication No. 8-319612

However, in the screen rotary dust remover as shown in FIG. 8, since the screen unit 61 has a structure in which the screen unit 61 overlaps on the front side due to its own weight, it is necessary to loosen the ascending gradient of the screen unit 61. There is a problem that a wider installation space is required than the screen rotary dust remover shown.

Further, when the screen unit 61 is inverted at the top, vibration and noise are generated due to a collision with a stopper that regulates the swing angle of the screen unit 61, so that it is necessary to provide a buffer mechanism for reducing operating noise. Even if such a mechanism is provided, there are restrictions such as vibration and noise cannot be sufficiently removed and it cannot be installed in a place where there is a residential area nearby.

Therefore, an object of the present invention is to provide a screen rotary dust remover that can be installed in a limited narrow space and does not generate large vibration and noise during operation.

In order to solve the above problems, the present invention comprises a plurality of screen units in which screen bars are arranged in a comb-teeth shape in the width direction, and a plurality of rake units in which scratches protrude from the screen bar extending on an extension line of the screen bar. With
The screen unit and the rake unit are connected to an endless chain running along a side chain guide and circulate and rotate between the bottom of the water channel and above the water surface, and the screen unit is attached to the chain. On the other hand, it is supposed to swing around the rotation axis.
On the front side facing upstream of the waterway, the screen units are in the basic posture along the chain, and the screen bars of the adjacent screen units are arranged without gaps in a side view.
On the rear side facing downstream of the water channel, the screen unit is in an open posture at an angle with respect to the chain as the screen swings, and the screen bars of the adjacent screen units are opened in a side view. In the rotary dust remover
A control roller is provided at the end of the screen unit away from the rotation axis with respect to the chain, and a control roller guide for guiding the control roller along the circulation path is provided on the side of the screen unit. Be,
The control roller guide is provided with a shift portion inclined with respect to the extending direction of the chain guide on the upper portion and the bottom portion on the back surface side.
The control roller is guided to the shift portion of the control roller guide on the rear side, and the screen unit swings independently of the rake unit whose posture does not change, changes from the basic posture to the open posture, and moves a certain distance. Later, it was decided to return to the basic posture.

Further, two control rollers are attached to cam plates provided at both ends of the screen unit, and the control roller guide has guide flanges facing each other in the front-rear direction in the water flow direction.
The two control rollers each come into contact with the opposing guide flanges of the control roller guides, and are regulated by the opposing guide flanges so that the screen unit swings together with the cam plate at the shifting portion. It is.

Further, since the chain guide and the control roller guide are formed as a part of an integral guide member, and the control roller guide intersects the chain guide in a side view in the shift portion. is there.

Further, a wiper that meshes with the screen bar of the screen unit, the screen bar of the rake unit, and the scratch claw above the water surface of the water channel is provided.
The wiper swings while sliding in contact with the screen bar and the scratch claw as the screen unit and the rake unit circulate, and scrapes off the dust entwined with the screen bar and the scratch claw. is there.

In the screen rotary dust remover according to the present invention, the control roller provided at the end of the screen unit is guided by the control roller guide to separate the screen unit so as not to interfere with the rake unit, and the screen unit is basically on the front side. It is in a posture and is forcibly controlled to be in an open posture on the back side.

Therefore, it is possible to prevent the accumulation of dust between the front side and the back side, and the screen unit can be installed in a limited narrow space as a structure in which the screen unit rises linearly with a steep slope.

Further, unlike the conventional one in which the screen unit is oscillated by its own weight, large vibration and noise are not generated during operation, and the durability is improved.

Further, the posture of the screen unit can be stabilized by being controlled by the rotation shaft and two control rollers at both ends, and the chain guide and the control roller guide can be used as an integrated guide member to simplify the structure. Can be achieved.

In addition, the screen unit and rake unit can be freely rearranged with a simple operation according to the width of the waterway and the condition of impurities flowing through the waterway, and the spacing in the width direction of the screen bar and the number of rake units can be adjusted. it can.

A side view showing a normal rotation state of the screen rotary dust remover according to the present invention. The perspective view which shows the arrangement of the screen unit and the rake unit of the same above. Enlarged side view showing between the opening and closing parts of the screen unit of the same as above. An enlarged perspective view showing the operation in part A of FIG. 3 above. Side view and cross-sectional view showing a swinging state every 15 ° as above. Same as above Side view showing the reverse rotation state of the screen rotary dust remover Perspective view showing the screen rotary dust remover described in Patent Document 1. Perspective view showing the screen rotary dust remover described in Patent Document 2.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6.

As shown in FIGS. 1 and 2, in a water supply or sewage treatment facility, the side facing the upstream side of the water channel W is the front side, and the side facing the downstream side of the water channel W is the back side. Will be installed.

As shown in FIG. 1, in this screen rotary dust remover, a plurality of screen units 1 are arranged in a strip shape, and a smaller number of rake units 2 than the screen unit 1 are interposed in the arrangement direction at regular intervals. .. The screen unit 1 and the rake unit 2 circulate and rotate between the bottom of the water channel W and above the water surface together with the endless chains 3 on both sides.

As shown in FIG. 2, each of the screen units 1 has a configuration in which screen bars 11 are arranged in a comb-teeth shape in the width direction and integrally connected by a square pipe-shaped connecting rail 12, and the ends of the connecting rail 12 are connected. The portion is fixed to the triangular plate-shaped cam plate 13, and the cam plate 13 is connected to the link of the chain 3 via the rotation shaft 4. As a result, the screen unit 1 can swing about the rotation shaft 4 with respect to the chain 3.

The rake unit 2 has a scratching claw 22 on which each screen bar 21 protrudes, and the screen bars 21 are arranged in a comb-teeth shape in the width direction and integrally connected by a square pipe-shaped connecting rail 23. The end of the connecting rail 23 is connected and fixed to the link of the chain 3 via the bracket 24.

The chain 3 travels along the chain guide 31 of the guide member 30 as a large number of chain rollers 3a provided on the link roll.

As shown in FIGS. 3 and 4, the cam plate 13 at the end of the screen unit 1 is rotatably provided with two control rollers 14 and 15 apart from the rotation shaft 4 with respect to the chain 3. A control roller guide 32 for guiding the control rollers 14 and 15 over the entire circumference of the circulation path is provided on the side of the screen unit 1.

The control roller guide 32 has a guide flange 32a that faces each other, and the two control rollers 14 and 15 at each end of the screen unit 1 rotate in contact with the guide flange 32a that faces each other.

The control roller guide 32 is provided with a shift portion 33 inclined with respect to the extending direction of the chain guide 31 at the upper portion and the bottom portion of the portion that is inside the water channel W on the back surface side.

The chain guide 31 and the control roller guide 32 are formed as a portion of an integral guide member 30, and in the shift portion 33, the control roller guide 32 intersects the chain guide 31 in a side view.

Further, as shown in FIG. 1, a wiper 41 that meshes with the screen bar 11 of the screen unit 1 and the screen bar 21 and the scratching claw 22 of the rake unit 2 above the water surface of the water channel is provided near the top on the back side. ing.

Further, on the bottom surface of the water channel W, a bottom screen 42 is installed in order to prevent a phenomenon in which dust is short-circuited to the downstream side and flows out from between the bottom of the circulation path of the screen unit 1 and the rake unit 2 and the bottom surface of the water. Has been done.

In the above screen rotary dust remover, when the screen unit 1 and the rake unit 2 are circulated and rotated in the forward rotation direction, the screen unit 1 is basically along the chain 3 from the bottom of the water channel W to the portion above the water surface on the front side. In the posture, the screen bars 11 of the adjacent screen units 1 are arranged side by side without any gap, and the dust captured by the screen unit 1 and the rake unit 2 rising in the water channel W is above the water surface from the water. It is scraped up.

Then, at the portion where the screen unit 1 and the rake unit 2 have passed the top and started to descend on the back side, the wiper 41 slides on the screen bar 11 of the screen unit 1 and the screen bar 21 and the scratching claw 22 of the rake unit 2. It swings while touching, and scrapes off the dust entwined with the screen bars 11 and 21 and the scratch claw 22.

Next, in the underwater portion of the water channel W on the back side, the control rollers 14 and 15 are guided while being restricted by the opposite guide flange 32a of the shift portion 33 above the control roller guide 32, and the screen unit 1 is guided. It swings together with the cam plate 13 to form an open posture at an angle with respect to the chain 3 from the basic posture, and the screen bars 11 of the adjacent screen units 1 are opened from each other in a side view.

In FIG. 5, the swing angle of the screen unit 1 at the shift portion 33 is shown every 15 °, and the screen unit 1 swings up to 60 ° with respect to the chain 3.

Therefore, the fine dust that has passed through the screen unit 1 on the front side does not stay between the screen unit 1 on the front side and the screen unit 1 on the back side, but is flowed to the downstream side together with the water flow.

After that, when the screen unit 1 descends in the water channel W to the vicinity of the bottom, the control rollers 14 and 15 are guided while being restricted by the opposite guide flange 32a of the shift portion 33 below the control roller guide 32, and the screen unit 1 is guided. Together with the cam plate 13, it swings in the direction opposite to the above direction, returns from the open posture to the basic posture along the chain 3, and closes between the screen bars 11 of the adjacent screen units 1 in a side view.

Then, the screen unit 1 and the rake unit 2 wrap around to the front side and start to rise, and the above operation is repeated.

Here, FIG. 1 shows a state during normal operation in which the screen unit 1 and the rake unit 2 rotate in the forward direction to scrape up dust, but when large dust is caught, FIG. 6 is shown. As shown in, the drive direction of the chain 3 is switched, and the screen unit 1 and the rake unit 2 are rotated in the reverse direction.

Even when the screen unit 1 and the rake unit 2 are rotated in the reverse direction in this way, the screen unit 1 that rises on the back side is guided by the shift portion 33 of the control roller guide 32, and is guided from the basic posture to the chain 3. It is in an angled open posture, and the space between the screen bars 11 of the adjacent screen units 1 is opened in a side view. At this time, the wiper 41 is pushed by the scratching claw 22 and retracted.

As described above, in this screen rotary dust remover, the control rollers 14 and 15 provided at the end of the screen unit 1 are guided by the control roller guide 32 so that the screen unit 1 does not interfere with the rake unit 2. It is forcibly controlled so that the front side is in the basic posture and the back side is in the open posture.

Therefore, it is possible to prevent the accumulation of dust between the front side and the back side, and the screen unit 1 can be installed in a limited narrow space as a structure in which the screen unit 1 rises linearly with a steep slope.

Further, unlike the conventional one in which the screen unit 1 is oscillated by its own weight, large vibration and noise are not generated during operation, and the durability is improved.

Further, the posture of the screen unit 1 can be stabilized by being controlled by the rotating shaft 4 and the two control rollers 14 and 15 at both ends, and the chain guide 31 and the control roller guide 32 are integrated. As the guide member 30, the structure can be simplified.

In addition, the screen unit 1 and the rake unit 2 can be freely rearranged by a simple operation according to the width of the water channel W and the situation of impurities flowing through the water channel W, and the spacing in the width direction of the screen bars 11 and 21 and the rake unit. The number of 2 can be adjusted.

Therefore, it can be flexibly installed even in a narrow place where there is a residential area in the vicinity, and the choice of the construction site of the treatment facility such as water supply and sewerage is expanded.

Further, in many conventional screen rotary dust removers, a net-shaped screen circulates and rotates, or a screen bar is fixed to each square frame of a plurality of circulating and rotating screen units. In that case, It was necessary to inject pressure water to separate and discharge the scraped dust from the scraped top surface of the screen. However, in this dust remover, the dust is scraped off by the wiper 41 without power, so a pump for pressure water, etc. No accessory is required.

1 Screen unit 2 Rake unit 3 Chain 3a Chain roller 4 Rotating shaft 11 Screen bar 12 Connecting rail 13 Cam plate 14, 15 Control roller 21 Screen bar 22 Scratching claw 23 Connecting rail 24 Bracket 30 Guide member 31 Chain guide 32 Control roller guide 32a Guide flange 33 Shift 41 Wiper 42 Bottom screen W Channel

As shown in FIGS. 2 to 4 , each of the screen units 1 has a configuration in which screen bars 11 are arranged in a comb-teeth shape in the width direction and integrally connected by a square pipe-shaped connecting rail 12. The end portion of the 12 is fixed to the triangular plate-shaped cam plate 13, and the cam plate 13 is connected to the link of the chain 3 via the rotation shaft 4. As a result, the screen unit 1 can swing about the rotation shaft 4 with respect to the chain 3.

Claims (4)

A plurality of screen units (1) in which screen bars (11) are arranged in a comb-teeth shape in the width direction, and a plurality of screen units (22) in which scratches (22) protrude from a screen bar (21) extending on an extension line of the screen bar (11). Equipped with a rake unit (2)
The screen unit (1) and the rake unit (2) are connected to an endless chain (3) running along a side chain guide (31), and are connected to the bottom of the water channel (W) and above the water surface. The screen unit (1) is supposed to circulate and rotate between the two, and the screen unit (1) swings about the rotation shaft (4) with respect to the chain (3).
On the front side facing upstream of the water channel (W), the screen unit (1) is in the basic posture along the chain (3), and the screen bars (11) of the adjacent screen units (1) are on the side surfaces. Arranged without any gaps in the visual
On the rear side facing downstream of the water channel (W), the screen unit (1) is in an open posture at an angle with respect to the chain (3) as it swings, and the screens of the adjacent screen units (1) are displayed. In a screen rotary dust remover in which the space between the bars (11) is opened from the side view,
A control roller (14,15) is provided at the end of the screen unit (1) apart from the rotation shaft (4) with respect to the chain (3), and on the side of the screen unit (1), A control roller guide (32) for guiding the control rollers (14, 15) along the circulation path is provided.
The control roller guide (32) is provided with a shift portion (33) inclined with respect to the extending direction of the chain guide on the upper portion and the bottom portion on the back surface side.
The control rollers (14, 15) are guided by the shift portion (33) of the control roller guide (32) on the back side, and the screen unit (1) does not change its posture. A screen rotary dust remover that swings independently, changes from the basic posture to the open posture, and returns to the basic posture after moving a certain distance. Two control rollers (14, 15) are attached to cam plates (13) provided at both ends of the screen unit (1), and two control roller guides (32) are attached to the front and rear of the water flow direction. Has opposite guide flanges (32a)
The two control rollers (14, 15) are in contact with the opposite guide flanges (32a) of the control roller guides (32), respectively, and are regulated by the opposite guide flanges (32a). 33) The screen rotary dust remover according to claim 1, wherein the screen unit (1) swings together with the cam plate (13). The chain guide (31) and the control roller guide (32) are formed as a portion of an integral guide member (30), and the shift portion (33) is viewed from the side with respect to the chain guide (31). The screen rotary dust remover according to claim 1 or 2, wherein the control roller guides (32) intersect. The screen bar (11) of the screen unit (1), the screen bar (21) and the scratch claw (22) of the rake unit (2) are provided with a wiper (41) that meshes above the water surface of the water channel (W).
The wiper (41) swings while sliding against the screen bar (11, 21) and the scratch claw (22) as the screen unit (1) and the rake unit (2) circulate and rotate. The screen rotary dust remover according to any one of claims 1 to 3, wherein dust entwined with the screen bar (11, 21) and the scratch claw (22) is scraped off.

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