JPH0466103A - Device for preventing sand-lifting machine from capturing foreign matter - Google Patents

Abstract

PURPOSE:To prevent foreign matter from being captured by a sprocket wheel by mounting a basket chain on a sprocket wheel and providing a pair of parallel guides which vertically hold the chain therebetween just before the sprocket wheel in the advancing direction thereof. CONSTITUTION:A basket chain 23 provided with large number of baskets 24 is mounted on sprocket wheels 25, 26, 2B...2N provided on a body 22 and on the opposite sides of a scraper guide frame 21 so as to be driven at predetermined positions. A fitting 3 for preventing foreign matter from being captured has an arrangement such that a pivotal bracket 32 is slidably provided by a pin at the lower end of a pivotal link 31 suspended from a scraper guide frame 21 just before a sprocket wheel 25, while a kick off guide 33 in contact with the upper surface of the chain 2 for preventing the chain 23 from rising up an a guide 34 for supporting the underside of the chain 23 to prevent it from hanging down are faced with each other in a vertical direction. The guide 33 had a horizontal underside and has an elevated central part to form slopes so that foreign matter runs onto the slopes and fall down therefrom.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is a sand pump installed in a sand settling pond, etc., in which foreign objects such as empty cans, wood chips, and pebbles mixed in the sand are removed from the bucket chain. This relates to a device that prevents the sprocket wheel from getting caught between the sprocket wheel and the sprocket wheel.

[Conventional technology]

In the settling pond, a sand pump is installed as a means for scraping up and discharging the dirty sand, so-called settled sand, that has accumulated on the bottom of the pond. As shown in Figure 1, this generally consists of a main body placed above the settling basin, a raking guide frame that runs along the bottom of the basin, and can be raised and lowered, and a chain with many buckets attached to it. has been done.

[Problem to be solved by the invention]

However, in a bucket chain type sand pump, foreign objects such as empty cans, wood chips, and pebbles mixed in the sand are conveyed on the chain, and these foreign objects get caught between the chain and sprocket wheel, causing an overload on the sea sand pump. In the worst case scenario, this can lead to burnout of the motor and damage to the sprocket wheel or chain.

The object of the present invention is to forcibly remove such foreign matter just in front of the sprocket wheel.

[Means to solve the problem]

The present invention has been made to achieve the above-mentioned object, and the bucket chain is suspended by a sprocket wheel, and immediately in front of the chain traveling direction of the sprocket wheel, two vertically parallel chains sandwiching the chain from both the upper and lower directions are attached. The main idea is to install a metal fitting made of a book guide to prevent foreign objects from getting caught.

[For production]

Even if a foreign object such as an empty can mixed in the sand gets on the chain and is transported to the sprocket wheel side by the drive of the chain, it will be removed at the position immediately before the sprocket wheel.
Foreign matter can be prevented from getting caught in the sprocket wheel because it is forcibly removed by a metal fitting consisting of two guides arranged in the vertical direction of the chain.

〔Example〕

The present invention will be explained below based on the illustrated embodiments.

FIG. 1 is a schematic diagram of a sand pumping machine, in which a raking guide frame 21 is provided in a sand settling basin 1 so as to be movable up and down along the bottom of the basin, a main body 22 is movably disposed above the pond, and this guide frame 21
, a sand lifter 2 consisting of a bucket chain 23 stretched between main bodies 22 is provided.

'And by driving the bucket chain 23 provided with this large number of buckets 24, this bucket chain 23
As it moves along the pond bottom under the control of the raking guide frame 21, it scoops up sediment and discharges it on top of the pond. Therefore, this bucket chain 23 is driven at a predetermined position by sprocket wheels 25, 26, 2 provided on the main body side and at both ends of the raking guide frame.
It is stretched between A, 2B...2N.

As shown in FIG. 1, the sand lifter 2 constructed as described above is set at a predetermined position in the sand settling basin 1 and driven to sequentially discharge the sand on the bottom of the basin to the upper side of the basin.

At this time, empty cans, wood chips, pebbles, etc. were mixed in the settling sand.
Impurities such as empty cans may get on the chain.

Alternatively, when the sand removal machine is used to remove sand while raising it pitch by pitch in the horizontal direction, cans or pieces of wood may fall onto the chain from the horizontal piles, and a similar phenomenon may occur in such cases. If the chain is driven with empty cans, pieces of wood, etc. placed on the chain, foreign objects such as empty cans may get caught in the sprocket wheel 25. In order to prevent this from happening, a foreign object jamming prevention fitting 3 is suspended from the scraping guide frame 21 at a position immediately before the sprocket wheel 25.

This foreign object jamming prevention fitting 3 is an embodiment shown in FIGS. 2 to 5.

In this embodiment, a swinging bracket 32 provided swingably at the lower end of a swinging link 31 suspended from a raking guide frame 21 comes into contact with the upper surface of the chain 23 to prevent the chain from floating. The kick-out guide 33 and the guide 34 that supports the lower surface of the chain and prevents the chain from hanging down are vertically opposed to each other, and the old lower surface of the chain is configured to be slidable and held therebetween. Kakiage guide frame 21
It is also possible to fix the kick-out guides 33 and 34 through brackets, and FIGS. 2 and 3 show the swinging type, and FIGS. 4 and 5 show the fixed type. Indicated. As shown in the figure, the lower surface of the kick-out guide 33 is a substantially horizontal surface along the direction of movement of the chain, but the upper surface is an inclined surface that is low at the tip and high at the center, and the top surface of the tip is not too high above the top surface of the chain, so that foreign objects such as empty cans carried on the chain can easily and reliably climb onto this kick-out guide 33, roll, and fall to be removed. Eggplant. This work is the same even if the link and bracket are fixed.

6 to 8 is a second embodiment, in which a guide plate 35 is attached to the end of the raking guide frame 21 at the attachment position of the sprocket wheel 25, and the sprocket Y An arc-shaped sled 36 disposed along the outer circumferential direction of the wheel and just before the sprocket,
It also includes an upper sled 37 facing the upper surface of the chain. The upper and lower sleds 37 and 36 arranged above and below these sleds face the upper and lower surfaces of the chain 23, and foreign objects such as empty cans that get on the chain are kicked out by the upper sleds 37 and removed. .

〔Effect of the invention〕

According to the present invention, foreign objects such as empty cans that are carried on the chain are removed by two guides or sledges that are placed just before the sprocket wheel on which the bucket chain is stretched, sandwiching the upper and lower surfaces of the chain. Since it is kicked out and removed by the upper guide or sled, it is possible to prevent it from getting caught in the sprocket wheel.

[Brief explanation of drawings]

The drawings show a device for preventing foreign objects from being caught in a sand pump according to the present invention, and FIG. 1 is a schematic illustration of the entire sand pump, FIGS. 2 to 5 show the first embodiment, and FIG. 2 is a swing-type sand pump. 3 is a side view of FIG. 2, FIG. 4 is a front view of a fixed type, and FIG. 5 is a side view of FIG. 4. 6 to 8 show the second embodiment, FIG. 6 is an explanatory diagram of the end of the raking guide frame, FIG. 7 is a front view of the main part thereof, and FIG. 8 is a side view of FIG. It is a diagram. 1 is a sand settling basin, 2 is a sand lifter, 21 is a raking guide frame,
23 is a bucket chain, 24 is a bucket, 25 is a sprocket wheel, 3 is a fitting for preventing foreign objects from getting caught, 31 is a linkage, 32 is a bracket, 33 is a kicking guide, 34 is a guide, 36 is a sled, and 37 is an upper sled.

Claims (1)

[Claims] (1) In a sand pump that is installed in a sand settling pond and lifts the sludge deposited on the bottom of the pond using a bucket attached to a chain that moves along the bottom of the pond, the bucket chain is moved by a sprocket wheel. A foreign matter jamming device for a sand lifter characterized in that a foreign matter jamming prevention fitting consisting of two vertically parallel guides that clamps the chain from both up and down directions is installed just before the sprocket wheel in the chain traveling direction. Included device.