JPH02172502A - Apparatus for scraping up settled sand - Google Patents

Abstract

PURPOSE:To prevent a bucket from being buried in sludge by moving a front sprocket wheel and a rear sprocket wheel upward by actuating an oscillating mechanism so as to move the route of a bucket upwardly above a reservoir. CONSTITUTION:A front sprocket wheel 33 and a rear sprocket wheel 35 are provided at the lower ends of a front swing arm 67 and a rear swing arm 69 which respectively pivot on support axes 63 and 65, while an oscillating mechanism 71 is provided to oscillate the arms 67, 69. Further, one end of a tension arm 85 is connected rotatably to the arm 67, while a free end of a link member 87 which rotates on a support axis 61 is connected to the other end of the arm 85, on which connecting part, a tension-imparting member 89 which is pressed on the outer side of a part of a chain 49 located intermediate between an upper sprocket wheel 41 and the rear sprocket wheel 35 is provided. As a result, a bucket can be surely prevented from being buried in sludge.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sediment scraping device for scraping up sedimented substances such as sand settled in a pond tank.

[Conventional technology]

Generally, in sewage treatment facilities, industrial wastewater facilities, etc., a pond is installed to settle sand in the inflow water, and a sand-settling device is installed in this pond to scrape up the settled sand. has been done.

As such a sand settling and scraping device, for example,
Those disclosed in Japanese Utility Model Publication No. 133205, Japanese Utility Model Application Laid-Open No. 56-14613, etc. are known.

FIG. 4 shows this type of sand settling and scraping device, and in the figure, reference numeral 11 indicates a pond tank for settling sand in inflow water flowing from the direction of arrow A.

Inside the tank 11, a front sprocket wheel 13 and a rear sprocket wheel 15 are arranged at intervals in the horizontal direction.

On the other hand, on the top surface of the lid 17 of the pond tank 11, a sand removal machine 19 for discharging sand is arranged, and above this, an upper sprocket wheel 21, which is a driving sprocket wheel, is arranged.

In the figure, reference numeral 23 indicates a sprocket wheel of the take-up device, and reference numeral 25 indicates an intermediate sprocket wheel.

Front sprocket wheel 13. Upper sprocket wheel 21. Sp white ket hoi/! An annular chain 27 is wound around the /23°25 and the rear sprocket wheel 15, and a bucket 29 for scooping up sediment settled in the pond tank 11 is fixed to this chain 27.

In such a sand-settling and scraping device, the chain 27 is driven by the upper sprocket wheel 21 in the direction of arrow B in the figure, the sand is scraped up by the bucket 29 fixed to the chain 27, and the bucket 29 is driven by the sand-settling transporter 19. At the upper position, the sediment in the bucket 29 is fed into the sediment transport machine 19, and the sediment settled in the pond tank 11 is transferred to the sediment transport machine 1.
It is discharged to the outside from 9.

[Problem to be solved by the invention]

However, in such a conventional sand-settling and scraping device, when the amount of water flowing into the pond tank 11 increases due to heavy rain, or when the use of the sand-settling and scraping device is stopped for a long time, There is a problem in that a large amount of sludge and the like accumulates at the bottom of the pond tank 11, and the bucket 29 of the settling and scraping device is buried in the sludge, causing an overload during operation and being unable to perform its function and being forced to stop. .

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a sand raking device that can reliably prevent a bucket from being buried in sludge with a simple configuration.

[Means to solve the problem]

The sand raking device according to the present invention has a front sprocket wheel and a rear sprocket wheel disposed in a pond at intervals in the horizontal direction, an upper sprocket wheel disposed above the pond, and a wheel.

In the sediment scraping device, the front sprocket wheel is formed by connecting a rear sprocket wheel and an upper sprocket wheel, wrapping the inside of an annular chain, and fixing to this chain a bucket for scraping up sediment settled in the pond tank. and a rear sprocket wheel are arranged at the lower ends of a front swing arm and a rear swing arm that rotate around a support shaft, and a swing mechanism that swings these front swing arms and rear swing arms, Further, one end of a tension arm is rotatably connected to the front swing arm, and a free end of a link member that rotates about a support shaft is connected to the other end of the tension arm, and the connecting portion Further, a tension applying member is arranged to abut on the outside of a portion of the chain located between the upper sprocket wheel and the rear sprocket wheel.

[For production]

In the present invention, for example, when the amount of water flowing into the pond tank increases due to heavy rain, etc., or when the use of the sand raking device is stopped for a long time, the front swing arm and rear A swing arm is swung such that a front sprocket wheel and a rear sprocket wheel, respectively located at their lower ends, move upwardly.

Then, the tension arm and the link member are moved by the swinging of the front swing arm, so that the linking part between the tension arm and the link member is positioned at a predetermined position, and the tension applying member disposed at this linking part moves the tension arm and the link member. A predetermined tension is applied to the chain.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of the present invention will be described with reference to an embodiment shown in the drawings.

Figures 1 to 3 show an embodiment of the sand settling and scraping device of the present invention, and in these figures, reference numeral 31 indicates a tank for settling sand in inflow water. .

Inside this pond tank 31, a front sprocket wheel 33 and a rear sprocket wheel 35 are arranged at intervals in the horizontal direction.

On the other hand, on the upper surface of the lid 37 of the pond tank 31, a sand removal machine 39 for discharging sand is arranged, and above this, an upper sprocket wheel 41, which is a driving sprocket wheel, is arranged.

The drive shaft 43 of the upper sprocket wheel 41 has a structure in which power from a drive device 45 is transmitted via a drive chain 47.

Front sprocket wheel 33. The inner side of an annular chain 49 is wound around the rear sprocket wheel 35 and the upper sprocket wheel 41, and a bucket 51 for scraping up sediment settled in the pond tank 31 is fixed to the chain 49.

In this embodiment, a take-up device 53 is disposed horizontally spaced apart from the upper sprocket wheel 41, and the tension in the chain 49 is adjusted by horizontally moving the sprocket wheel 55.

Further, below the take-up device 53, an intermediate sprocket wheel 57 is rotatably arranged on a support shaft 61 whose both ends are fixed to the side wall 59 of the pond tank 31.

Therefore, in this embodiment, the front sprocket wheel 33 and the rear sprocket wheel 35 are connected to the pond tank 31.
The front swing arm 67 and the rear swing arm 69 are arranged at the lower ends of the front swing arm 67 and the rear swing arm 69, which rotate around support shafts 63 and 65 fixed to the side wall 59 of the front swing arm 67 and the rear swing arm 69, respectively.

The front swing arm 67 and the rear swing arm 69 are swingable by a swing mechanism 71.

That is, the front swing arm 67 and the rear swing arm 69 are connected at their open end sides by a connecting arm 73, and one end of a wire row 175 is connected to an intermediate portion of the connecting arm 73.

The other end of this wire lobe 75 is connected to a winding drum 7 of a winding device 77 disposed on the top surface of the lid 37 of the pond tank 31.
9, and the winding drum 79 is connected to the drive device 81.
It can be rotated freely via a chain 83.

One end of a tension arm 85 is rotatably connected to the lower end of the front swing arm 67, and the other end of the tension arm 85 is connected to the intermediate sprocket wheel 5.
The open end of a link member 87 that rotates around a support shaft 61 that supports 7 is connected.

A tensioning member 89 is disposed at this connection portion and abuts on the outside of the portion of the chain 49 located between the upper sprocket wheel 41 and the rear sprocket wheel 35 .

The tension applying member 89 is made of a sprocket wheel that rotates around the connecting portion, and a weight member 91 is arranged at the lower end of the link member 87.

In the sand raking device configured as described above, the drive device 4
When the upper sprocket wheel 41 . Sprocket wheel 55 of take-up device 53. Intermediate sprocket wheel 57. Tensioning member 89. Along the rear sprocket wheel 35 and the front sprocket wheel 33, the sand is scraped up by a bucket 51 that is driven in the direction of arrow B in the figure and fixed to the chain 49, and the bucket 51 is positioned above the sand transporter 39. At this point, the sand in the bucket 51 is transported to the sand transporter 3.
9 and settled in the pond tank 31 is discharged to the outside from the sand transporter 39.

For example, when the amount of water flowing into the pond tank 31 increases due to heavy rain or the like, or when the use of the sand-settling and scraping device is stopped for a long time, the hoisting device 77 constituting the swinging mechanism 71 The winding drum 79 of is rotated by the drive device 81, whereby the wire rope 75 is wound onto the winding drum 79, and the connecting arm 73 is moved upward, whereby the front swing arm 67 and the rear swing arm 69 are rotated. The front sprocket wheel 33 and the rear sprocket wheel 35, which are disposed at the lower ends thereof, are swung to move upward and are located at the position shown by the two-dot chain line in the figure.

Then, by the swinging of the front swing arm 67, the tension arm 85 and the link member 87 are moved to the position shown by the two-dot chain line in the figure, and are thereby disposed at the connecting portion between the tension arm 85 and the link member 87. A tension applying member 89 is positioned at a predetermined position on the chain 49, and a predetermined tension is applied to the chain 49 by a weight member 91 fixed to the link member 87.

However, in the sand settling and scraping device configured as above,
A front swing arm 67 and a rear swing arm 6 rotate the front sprocket wheel 33 and the rear sprocket wheel 35 around support shafts 63 and 65.
9 and a swinging mechanism 71 that swings these front swing arm 67 and rear swing arm 69, the swing mechanism 71 is operated and the front sprocket wheel 33 and rear sprocket wheel 35 By moving the bucket 51 upward, it becomes possible to easily move the passage of the bucket 51 upward to the pond tank 31, and the simple configuration ensures that the bucket 51 is buried in the sludge. It can be prevented.

In addition, a tension arm 8 is attached to the front swing arm 67.
5 is rotatably connected to one end of the tension arm 85, and an intermediate sprocket wheel 57 is connected to the other end of the tension arm 85.
The open end of a link member 87 that rotates around a support shaft 61 is connected to the upper sprocket wheel 41 and the rear sprocket wheel 35 of the chain 49.
Tension applying member 8 that comes into contact with the outside of the part located between
9, even if the front swing arm 67 and the rear swing arm 69 move, the chain 49
This makes it possible to apply optimal tension to the

In the embodiments described above, the swing mechanism 71 is connected to the connecting arm 73. Wire rope75. Although an example has been described in which the drive device 81 and the like are used, the present invention is not limited to this embodiment, and it goes without saying that the invention may be configured using various other means.

Further, in the embodiments described above, an example was explained in which the tension applying member 89 was constituted by a sprocket wheel, but the present invention is not limited to such an embodiment.
Of course, a member such as a throttle wheel or a shoe may be used instead of the sprocket wheel.

〔Effect of the invention〕

As described above, according to the present invention, the front sprocket wheel and the rear sprocket wheel are arranged at the lower ends of the front swing arm and the rear swing arm that rotate around the support shaft, and and a swinging mechanism for swinging the rear swing arm, one end of a tension arm is rotatably connected to the front swing arm, and the other end of the tension arm is connected to the front swing arm for rotation around a support shaft. The free ends of the moving link members are connected, and the tension applying member is disposed at this connection part to abut on the outside of the part of the chain located between the upper sprocket wheel and the rear sprocket wheel. There is an advantage that it is possible to reliably prevent the bucket from being buried in the sludge.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the sand settling and scraping device of the present invention. FIG. 2 is a cross-sectional view of FIG. 1. FIG. 3 is a top view of FIG. 1. FIG. 4 is a longitudinal sectional view showing a conventional sand settling and scraping device. [Explanation of symbols of main parts] 31... Pond tank 33... Front sprocket wheel 35... Rear sprocket wheel 39... Sand transporter 41... Upper sprocket wheel 49... Chain 51... ... Bucket 61.63.65 ... Support shaft 67 ... Front swing arm 69 ... Rear swing arm 71 ... Swing mechanism 85 ... Tension arm 87 ... Link member 89 ... Tension applying member. Figure Figure Figure

Claims (1)

[Claims] (1) In a pond tank, a front sprocket wheel and a rear sprocket wheel are arranged at intervals in the horizontal direction, and an upper sprocket wheel is arranged above the tank, and the front sprocket wheel, the rear sprocket wheel, and the upper In the sand raking device, the sprocket wheels are tied together and wrapped around the inside of an annular chain, and a bucket for raking up the sediment settled in the pond tank is fixed to the chain, and the front sprocket wheel and the rear sprocket wheel are , disposed at the lower ends of a front swing arm and a rear swing arm that rotate around a support shaft, and a swing mechanism that swings these front swing arm and rear swing arm; On the arm
One end of the tension arm is rotatably connected, and the other end of the tension arm is connected to the open end of a link member that rotates around a support shaft, and to this connecting part,
A sand raking device characterized in that a tension applying member is disposed in contact with the outside of a portion of the chain located between the upper sprocket wheel and the rear sprocket wheel.