JP3044088U - Bar rotating screen bucket structure - Google Patents

Abstract

(57) [Abstract] [Problem] To promote the natural crimping of dust on the receiving shelf of the bucket from the underwater surface to the above water surface, and to secure the load.
Make sure that dust is not blocked between the buckets. SOLUTION: A left and right side plates 18b of a large number of box-shaped buckets 8 having a screen bar 19 fixed to the back side of a bucket frame 18 and having a dust receiving shelf portion 18c on the lower side are provided as a pair of left and right endless carrying chains 3. Attached to the chain 3
Are respectively wound around the upper and lower chain wheels 4 and 5 and are arranged in the water channel 2, and the upper chain wheel 4 is rotated by the driving means arranged above the water channel 2, and the bucket 8 scoops up dust in the water. In the bar rotary screen 1 that is designed to be removed, the dust receiving shelf 18c of the bucket frame 18 is extended from the end of the bottom plate portion thereof to the dust catching height of the screen 19 on the rear surface, and the dust receiving shelf 18c is provided.
Water passage slits or water passage holes 25, 26 are provided in the.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a bucket structure of a bar rotary screen installed in an intake channel or the like for removing dust.

[0002]

[Prior art]

 Generally, water purification plants, power plants, etc., take large amounts of river water and seawater, and dust in the water is removed by a bar rotating screen. In this type of bar rotary screen, an endless carrying chain is wound between a lower chain wheel submerged in the water of the intake channel and an upper chain wheel arranged above the water surface. Buckets having vertically elongated slit-shaped screen bodies formed by screen bars are arranged at appropriate intervals on the ring chain, and the upper sprocket is driven by a motor (for example, Japanese Utility Model Laid-Open No. 61-141335). reference).

Then, the bucket catches dust in the intake channel and rises up, and when it is reversed by the upper chain wheel, the dust trapped by the bucket naturally falls and is collected in the trough through the fixed chute. It is supposed to be collected.

[0004] Then, the bucket is rotated between the upper chain wheels and rotates synchronously while corresponding to the back surface of the screen bar, and the cross section arranged coaxially with the upper chain wheel shaft has a regular polygonal shape to prevent dust from falling. It is equipped with a rotating plate.

[0005]

[Problems to be solved by the device]

 By the way, since the bucket in the above-mentioned conventional technology is equipped with a screen bar on the back of the bucket frame whose walls on the four sides are made of plates, the dust trapped from below the water surface to above the water surface causes poor drainage. There is a problem that it can not be sufficiently caught without crimping to the frame bottom plate which is a dust receiving shelf, and dust easily falls from between the screen bars to the inside of the screen, and further, there is a problem that it gets caught between the buckets and gets clogged. It

The present invention has been made in view of the above situation, and an object of the present invention is to promote the natural crimping of dust to the receiving rack of the bucket from a portion below the water surface to a portion above the water surface. The purpose of the present invention is to provide a bucket structure of a bar-rotating screen, which secures a load and prevents dust from clogging between buckets.

[0007]

[Means for Solving the Problems]

 In the present invention, the following technical measures were taken to achieve the above object. That is, according to the present invention, the screen bar is fixed to the back side of the bucket frame, and the left and right side plates of a large number of box-shaped buckets with the lower side as a dust receiving shelf are attached to a pair of left and right endless cauling chains to carry the carrying. The chain is wound between the upper and lower chain wheels, respectively, and placed in a waterway, etc., and the upper chainwheel is rotated by a drive means placed above the waterway, etc., and the bucket scoops up and removes dust in the water. In the bar rotating type screen, the dust receiving shelf portion of the bucket frame is extended from the end of the bottom plate portion thereof to the dust catching height of the rear screen bar side, and a water passing slit or passage is provided in the dust receiving shelf portion. A water hole is provided (Claim 1).

In this case, when the bucket catches dust in the water and rises to reach the surface of the water, the water in the bucket is smoothly discharged from the water passage slits or holes in the shelf of the bucket frame, and the dust is removed. Since it is naturally pressed against the receiving shelf to be reliably captured and the receiving shelf is extended to the back side, dust does not drop inside the screen and is not clogged.

Further, according to the present invention, since the opening edge of the upper side plate of the bucket frame is extended to the outside of the roller of the carrying chain, when each bucket moves above the water surface, it falls from the upper bucket. Due to the extension of the upper plate of the bucket frame, water and small debris are much less likely to fall into the lower bucket, resulting in good drainage efficiency and smooth operation.

[0010]

[Embodiment of the invention]

 Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment of the present invention. The bar rotary screen 1 according to the present invention comprises a pair of endless carrying chains 3 provided on both sides of a water channel 2 in the width direction (left and right), and a pair of left and right upper chain wheels 4 around which the chains 3 are wound. A chain wheel 5, upper and lower chain wheel shafts 6 and 7, a large number of screen buckets 8 mounted between the chains 3, chain driving means (not shown), and a pair of left and right chain wheels on the chain wheel shafts 6 and 7. From the pair of left and right regular hexagonal bucket support wheels 9 and 10 fixed to the inside of each of the wheels 4 and 5, and the plate-like dust drop prevention body 11 fixed between the outer peripheral surfaces of the pair of left and right support wheels 9. Is made.

The bucket support wheels 9 and 10 each include a boss 12, an arm 13, and a rim 14 that connects the outer ends of the arms 13 to each other. The outer peripheral surface of the rim 14 forms a hexahedron. The maximum diameter of the wheels 9 and 10 is considerably smaller than the pitch circle diameter of the chain wheel 4 so that the upper ends of the buckets 8 do not interfere with each other.

Between the outer peripheral surfaces of the rims 14 of the pair of left and right upper bucket support wheels 9, a dust drop prevention body 11 is fixed in a erected manner in parallel with the wheel shaft 6, and the fall prevention body 11 is provided. The width in the circumferential direction of the bucket 8 is a length that supports the entire back surface of the bucket 8, that is, a length that can completely close the gap between the screen bars 8b, and the rear end 11a of the fall prevention body 11 in the rotation direction is the bucket support wheel. 9 is extended by a considerable length, and the pitch of each fall prevention member 11 in the circumferential direction is substantially the same as the pitch of the carrying chain 3.

In FIG. 1, 15 is a chute, 16 is a trough, and 17 is a slab. The bar rotary screen 1 is erected on the slab 17 by a support frame or the like (not shown). The bucket support wheel 9 is formed by directly welding the inner surface of the dust drop prevention body 11 to the arm 13 without providing the rim 13 and extending the front end of the dust fall prevention body 11 in the rotation direction so as to be adjacent thereto. The dust drop prevention body 11 can be formed into a hexagonal cylindrical shape by welding to the inner surface side of the dust fall prevention body 11 and the tip of the arm 13 to cover the entire outer circumference of the foil. Further, the lower bucket support wheel 10 may be formed in a hexagonal tube shape like the upper bucket support wheel 9.

The screen bucket 8 includes a bucket frame 18 made of a metal plate having four circumferences, a screen bar 18 and a screen provided in parallel on the back surface and the bottom of the frame 18 at regular intervals in the width direction. The bottom plate reinforcing member 20 also serves as a bar, and the left and right side plates 18b are detachably connected to the link 3a of the carrying chain 3 by a connecting member 21 (see FIG. 3).

Then, as shown in FIG. 2, the upper plate 18a and the left and right side plates 18b of the bucket frame 18 have their opening end edges 22 extended to the outside considerably longer than the rollers 3b of the carrying chain 3, Water and small dust that have fallen from the upper bucket 8 are guided to the outside without flowing into the lower bucket 8 so that the drain from the lower bucket 8 can be performed efficiently. .

Further, as shown in FIG. 2, the left and right side plates 18b of the frame 18 are provided with a substantially semicircular cutout portion 23 at the center of the upper end thereof, and a substantially semicircular cutout portion at the lower end portion thereof. It is provided with a protrusion 24 which is fitted with a predetermined gap and allows mutual rotation, so that each screen bucket 8 can be connected as close as possible to the link 3a of the chain 3. is there. The centers of the arcs of the notch 23 and the protrusion 24 are aligned with the center of the roller 3b of the carrying chain 3.

The lower side of the bucket frame 18, that is, the bottom plate portion is a dust receiving shelf portion 18c, and is extended from the bottom plate portion to a dust catching height h (that is, dust pile height) outside the screen bar 19 on the back surface. The reinforcing members 20 are fixed in parallel to the inside of the bottom plate so that the reinforcing members 20 have the same pitch as the screen bars 19 and are aligned with each other. Water passage slits 25 and 26 have been opened in parallel to improve drainage efficiency and ensure dust collection by natural crimping of dust.

According to the above-described embodiment, when the bucket 8 catches dust in the water and ascends to reach the surface of the water, the bucket 8 is moved from the water passage slits 25, 26 of the dust receiving shelf 18c of the bucket frame 18 to the bucket 8. The water inside is smoothly discharged and dust is naturally pressed against the receiving shelf 18c to be reliably captured, and since the receiving shelf 18c is extended to the back side, the dust falls inside the screen 1. There is no such thing, and the buckets 8 are not squeezed into each other.

Further, since the opening edge 22 of the upper side plate 18a and the left and right side plates 18b of the bucket frame 18 are extended to the outside considerably longer than the roller 3b of the carrying chain 3, the upper side plate 18a and the left and right side plates 18b fall from the upper stage side bucket. It is possible to prevent the collected water and small debris from flowing into the bucket 8 and guide the water to the outside so that the drainage from the lower bucket 8 can be efficiently performed. Moreover, since the bucket 8 is supported by the bucket support wheels 9 and 10 when turning up and down, the bucket 8 can be turned stably and smoothly.

FIG. 5 shows a main part of a second embodiment of the present invention. The difference from the first embodiment is that the dust receiving shelf 18c is formed by a plate (for example, punching metal) provided with a hole 27. In terms of the configuration, it is possible to expect the same effect as that of the first embodiment. Therefore, in FIG. 5, the same components as those in the first embodiment are designated by the same reference numerals as those in FIG. 3, and detailed description thereof will be omitted.

FIG. 6 shows an essential part of a third embodiment of the present invention. The difference from the first embodiment is that the rear side of the dust rack 18c is half the width of the bar 19 from each other. And a flat bar 28 having a length corresponding to the dust accumulation height h is fixed to the back surface of the screen bar 19, and a slit 25 is formed between the flat bars 28. In this case, a dust-extruding root plate can be provided on the upper surface of the dust drop prevention body 11 to push out the dust trapped between the screen bar 19 and the flat bar 28 into the bucket 8. Also in the third embodiment, the same operational effect as that of the first embodiment can be expected. Therefore, the same components as those in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted.

The present invention is not limited to the above-described embodiment, and, for example, of the bucket supporting wheels 9 and 10, the lower portion or both upper and lower portions thereof may be omitted or replaced with another supporting means. The design can be changed as appropriate.

[0023]

[Effect of the invention]

 According to the present invention, as described above, the dust receiving shelf portion of the bucket frame is extended from the end of the bottom plate portion to the dust catching height on the rear screen bar side, and a water slit or a water passing through the receiving shelf portion. Since it is characterized by the provision of holes, it is possible to promote the natural crimping of dust to the dust receiving shelf of the bucket at the portion from below the water surface to above the water surface, and to reliably carry the load. It is possible to perform dust removal work efficiently without causing dust to be caught or clogged between the buckets or between the bucket support foil and the like (claim 1).

Further, the invention according to claim 2 is characterized in that the upper plate opening edge of the bucket frame is extended to the outside considerably more than the roller of the carrying chain. Water and small debris that fall from the upper-stage bucket are much less likely to fall into the lower-stage bucket due to the bucket upper plate extension, which improves drainage efficiency and enables smooth operation.

[Brief description of the drawings]

FIG. 1 is an overall schematic side view of a bar rotary screen showing a first embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional side view of a main part in the same embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a cross-sectional view (corresponding to a cross section taken along the line AA in FIG. 2) showing a main part of a second embodiment of the present invention.

FIG. 6 is a cross-sectional view (corresponding to a cross section taken along the line AA of FIG. 2) showing a main part of a third embodiment of the present invention.

[Explanation of symbols]

 1 Bar Rotating Screen 2 Waterway 3 Carrying Chain 3b Roller 4 Upper Chainwheel 5 Lower Chainwheel 8 Screen Bucket 18 Bucket Frame 18a Upper Side Plate 18c Dust Storage Shelf 19 Screen Bar 22 Upper Plate Opening Edge 25, 26 Water Slit 27 Perforation

Claims (2)

[Utility model registration claims] 1. A left and right side plates of a large number of box-shaped buckets having a screen bar fixed to the back side of a bucket frame and having a dust receiving shelf on the lower side thereof are attached to a pair of left and right endless carrying chains. Are respectively wound between the upper and lower chain wheels and disposed in a water channel or the like, and the upper chain wheel is rotated by a driving means disposed above the water channel or the like to scoop up and remove dust in water by the bucket. In the bar rotating screen,
Extending the dust receiving shelf of the bucket frame from the bottom plate side end to the dust catching height on the rear screen bar side,
A bucket structure of a bar rotary screen, wherein a water passage slit or water passage hole is provided in the dust receiving shelf portion. 2. The bucket structure of the bar rotary screen according to claim 1, wherein an opening edge of an upper side plate of the bucket frame is extended to an outside of a roller of a carrying chain.