JPH11137923A - Traveling screen - Google Patents

Abstract

(57) [Problem] To provide a traveling screen capable of smoothly turning a carrying chain even when a bending radius of a lower turn portion is small, while being a guide rail type. A roller is provided at link portions at both ends of each link plate of a carrying chain, and an intermediate roller is provided between the rollers. This allows
Since the roller 31, the intermediate roller 34, and the roller 31 sequentially roll while contacting the outer peripheral inner wall surface 35b, the inner peripheral inner wall surface 35a, and the outer peripheral inner wall surface 35b of the groove 35 of the guide rail 23, the carrying chain 27 In addition, even the guide rail 23 having a small bending radius can be turned smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a traveling screen used for sewage treatment.

[0002]

2. Description of the Related Art Raw water such as clean water and sewage is mixed with various kinds of impurities of various sizes. Improving the quality of treated water and preserving the environment.

As an apparatus for removing suspended matters such as dust and jellyfish, for example, a dual flow type traveling screen (hereinafter referred to as a traveling screen) shown in FIG.
There is. In this traveling screen, a carrying chain 4 is hung on a sprocket wheel 2 and a guide rail 3 of a drive shaft 1, and a fine-grained screen member 5 made of stainless steel (or resin) is attached to each link of the carrying chain 4. The screen 6 is formed, and the opening 6a on one side of the screen 6 is installed so as to be connected to the supply port 7a of the water channel 7, and the opening 6a on the other side of the screen 6 is closed.

At the time of processing, the drive shaft 1 is rotated around the axis, the carrying chain 4 is run by the sprocket wheel 2, and the screen 6 is circulated in the vertical direction. The raw water 8 is filtered, and the filtered water 9 flows out of the screen 6.

[0005] Dust and the like adhering to the screen 6 (screen member 5) are removed by spraying cleaning water 11 from a cleaning nozzle 10, and together with the cleaning water 11, pass through a trough 12 to a processing device (not shown) outside the water channel. Derived.

[0006]

When the above-mentioned traveling screen is installed in a water channel having a small channel width, it is necessary to reduce the bending radius of a lower turn portion located in the water channel.

However, the conventional carrying chain is a two-roller type in which rollers are provided at link portions at both ends of each link plate, so that the above-described guide rail type cannot fully turn.

On the other hand, when a sprocket is arranged in the lower turn portion, for example, when the water depth is only about 500 mm,
The basic functions of the dual-flow traveling screen are impaired, such as blocking the flow of water on the sprocket and depositing sediment on the upstream side of the sprocket.

An object of the present invention is to provide a traveling screen which can smoothly turn a carrying chain even when a bending radius of a lower turn portion is small, while being a guide rail type. is there.

[0010]

In order to solve the above-mentioned problems, a traveling screen of the present invention comprises a sprocket wheel disposed at an upper part of a channel and a U-shaped wheel disposed at a lower part of the channel.
A traveling chain formed by extending a carrying chain over a shaped guide rail, joining a plurality of screen members to the carrying chain, and forming a screen that circulates vertically in accordance with the traveling of the carrying chain; The carrying chain has a configuration in which rollers that roll in the grooves of the guide rails are provided at link portions at both ends of each link plate and intermediate positions thereof.

According to the above construction, the rollers at both ends are in contact with the inner wall surface on the outer peripheral side of the groove of the guide rail, and the rollers at the intermediate position are in contact with the inner wall surface on the inner peripheral side, that is, three rollers are sequentially formed in the groove. Rolls in a state of contact with three points of the outer peripheral inner wall surface, the inner peripheral inner wall surface, and the outer peripheral inner wall surface, so that the carrying chain can smoothly turn even with a guide rail having a small bending radius.

[0012] Such a traveling screen using a guide rail has a smaller area for blocking a water channel than that using a sprocket, so that it blocks the flow of water,
Sediment rarely accumulates on the upstream side.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the dual flow type traveling screen (hereinafter, referred to as traveling screen) has substantially the same configuration as the conventional one described above with reference to FIG. ing.

A pair of sprocket wheels 22 are located at the upper part of the channel, a pair of U-shaped guide rails 23 are located at the lower part of the channel, and one sprocket wheel 23 is driven via a driving wheel 24 and a driving chain 25. Device 26
It is linked and linked.

A carrying chain 27 extends between the two sprocket wheels 22 and the guide rails 23, and a plurality of stainless steel (or resin) screen members 28 are attached to the carrying chain 27. A screen 29 is formed by the screen member 28. Opening 2 on one side of screen 29
9 a is connected to a supply port (not shown) in the water channel 21, and the opening 29 b on the other side of the screen 29 is closed.

The carrying chain 27 is, as shown in FIGS. 2 and 3, a pair of link plates 3 arranged in parallel.
0 and 30 are connected to the ends of a pair of link plates 30 and 30 adjacent to each other by connecting pins 32 having end rollers 31 extrapolated. An intermediate roller 34 that rotates around the axis is provided.

As shown in FIG. 4, the guide rail 23 has a concave groove portion 35, and the inner wall surface 35b on the outer peripheral side of the groove portion 35 guides the rolling of the end roller 31 and the inner peripheral side. The wall surface 35a has an arc surface that can guide the rolling of the intermediate roller 34. At the positions of the illustrated end roller 31 and intermediate roller 34, the screen member 28 assumes the posture illustrated in FIG.

In the above configuration, when the sprocket wheel 23 is rotated by the driving device 26 via the driving chain 25 and the driving wheel 24, the carrying chain 27 suspended on the sprocket wheel 23 travels, and the screen 29 is accordingly moved. Circulates vertically.

At this time, the carrying chain 27 has, at the lower portion, end rollers 31 of each link plate 30,
The intermediate roller 34 and the end roller 31 are sequentially formed on the outer peripheral side inner wall surface 35b and the inner peripheral side inner wall surface 3
5a, since the roller rolls in contact with the outer peripheral inner wall surface 35b, the guide rail 23 having a small bending radius can be smoothly turned by contact with the side of the link plate in the conventional two-roller type carrying chain. You can turn to

For example, when the distance between the connecting pins 32 of the link plate 30 is 200 mm,
1. When the intermediate roller 34 has a diameter of about 50 mm, the guide rail 35 has a lower outer peripheral inner wall surface 35b having a circular arc shape with a radius of approximately 240 mm, and an inner peripheral inner wall surface 35a.
Is formed in an arc shape with a radius of about 140 mm,
The carrying chain 27 can be turned smoothly. In this case, if the water channel 21 has a water depth of 500 mm, a water passage depth of 300 mm can be secured.

As described above, the dual flow type traveling screen using the guide rails has a smaller area for closing the water channel than the one using the sprockets, and can secure a sufficient water passage depth. However, sediment is unlikely to accumulate on the upstream side.

However, the configuration using the guide rails described above can also be applied to a traveling screen having a screen surface formed in a direction intersecting with the flow direction of the water channel.

[0023]

As described above, the traveling screen of the present invention can smoothly move the carrying chain even when the bending radius of the guide rail is reduced by arranging three rollers on each link plate of the carrying chain. It can be turned to prevent the flow of water and prevent the accumulation of sediment on the upstream side as in the conventional case using a sprocket.

[Brief description of the drawings]

FIG. 1 is a front view showing an entire configuration of a dual flow traveling screen according to an embodiment of the present invention.

FIG. 2 is a front view showing a carrying chain constituting the traveling screen of FIG. 1 together with a sprocket wheel.

FIG. 3 is a side view of the carrying chain.

FIG. 4 is an explanatory view showing a carrying chain together with a guide rail.

FIG. 5 is an explanatory diagram showing the positions of the rollers of the carrying chain and the posture of the screen member at that time.

FIG. 6 is an explanatory view showing the overall configuration of a conventional dual flow traveling screen.

[Explanation of symbols]

 21 Waterway 22 Sprocket wheel 23 Guide rail 27 Carrying chain 28 Screen member 29 Screen 30 Link plate 31 End roller 34 Intermediate roller 35 Groove 35a Inner inner wall surface 35b Outer inner wall surface

Claims (1)

[Claims] 1. A carrying chain extending over a sprocket wheel disposed at an upper part of a waterway and a U-shaped guide rail disposed at a lower part of a waterway, and a plurality of screen members are provided by being joined to the carrying chain. In a traveling screen formed with a screen that circulates in the vertical direction as the vehicle travels, the carrying chain is a roller that rolls in the groove of the guide rail at link portions at both ends of each link plate and at an intermediate position between the link portions. A traveling screen comprising: