CA1057703A - Scooping drum type sand washer - Google Patents
Scooping drum type sand washerInfo
- Publication number
- CA1057703A CA1057703A CA256,428A CA256428A CA1057703A CA 1057703 A CA1057703 A CA 1057703A CA 256428 A CA256428 A CA 256428A CA 1057703 A CA1057703 A CA 1057703A
- Authority
- CA
- Canada
- Prior art keywords
- drum
- sand
- annular chambers
- scooping
- plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
SPECIFICATION
Title of the Invention: SAND WASHER
Abstract of the Disclosure:
A sand washer for washing muddy sand charged into a rotating drum with the supply of water comprises a plurality of annular chambers formed in the drum, a plurality of scoop-ing plates held within each of the annular chambers, draining members provided for the scooping plates, and chutes secured to a base and associated with the annular chambers independ-ently of the drum motion, so that the muddy sand is washed and the washings drained off a plurality of times.
Title of the Invention: SAND WASHER
Abstract of the Disclosure:
A sand washer for washing muddy sand charged into a rotating drum with the supply of water comprises a plurality of annular chambers formed in the drum, a plurality of scoop-ing plates held within each of the annular chambers, draining members provided for the scooping plates, and chutes secured to a base and associated with the annular chambers independ-ently of the drum motion, so that the muddy sand is washed and the washings drained off a plurality of times.
Description
~057703 This invention relates to a sand washer for removing mud from sand for use, for example, as fine aggregate for forming concrete.
Sand not so muddy can be washed as it is sieved wit`h sprays of water under pressure. The aggregate covered with much mud, however, cannot be cleaned without using a washer specially designed therefor. The machines ~or clean-in~ such muddy pebbles and sands include scrubbers and sand washers, and the present invention falls under the domain of the latter. Conventional sand washers comprise a rotating drùm equipped with a trough at one end through which it is charged with muddy sand, so that the charge is washed on the bottom of the drum by water supplied from the outside through the opposite end of the vessel. With the revolution of the drum the sand cleared of mud is carried upward by a number of scooping plates disposed on the inner surface of the drum, and is then allowed to fall by gravity onto a belt conveyor extended into the drum to convey the clean sand out of the vessel.
Thus, for the washing of sand, the existing washers depend on a single turn of the drum whereby the sand washed on the bottom is scooped upward and then dropped onto the belt conveyor. Consequently, the washing efficiency is very low.
The present invention is directed to the provision of a sand washer capable of thoroughly washing mud away from sand by causing the muddy sand introduced into the drum to go through a unique process therein.
.
Sand not so muddy can be washed as it is sieved wit`h sprays of water under pressure. The aggregate covered with much mud, however, cannot be cleaned without using a washer specially designed therefor. The machines ~or clean-in~ such muddy pebbles and sands include scrubbers and sand washers, and the present invention falls under the domain of the latter. Conventional sand washers comprise a rotating drùm equipped with a trough at one end through which it is charged with muddy sand, so that the charge is washed on the bottom of the drum by water supplied from the outside through the opposite end of the vessel. With the revolution of the drum the sand cleared of mud is carried upward by a number of scooping plates disposed on the inner surface of the drum, and is then allowed to fall by gravity onto a belt conveyor extended into the drum to convey the clean sand out of the vessel.
Thus, for the washing of sand, the existing washers depend on a single turn of the drum whereby the sand washed on the bottom is scooped upward and then dropped onto the belt conveyor. Consequently, the washing efficiency is very low.
The present invention is directed to the provision of a sand washer capable of thoroughly washing mud away from sand by causing the muddy sand introduced into the drum to go through a unique process therein.
.
- 2 - ~ ~
1~)57703 1~
According to the present invention there is provided a sand washer for washing muddy sand comprising a drum mounted for rotation on a plurality of rollers, means for charging said drum with said muddy sand through an inlet means for supplying wash water to said drum through an inlet, a plurality of annular chambers formed in the drum, a plurality of scooping plates dis-posed within each of said annular chambers, draining members provided in said scooping plates, chutes secured to a base and disposed between said annular chambers independently of drum motion, a plurality of lengths of band steel helically coiled along, and secured to, the inner wall surface of a section of said drum close to said sand inlet, scooping plates located adjacent terminating ends of said helical lengths of band steel, and a chute secured to the base and associated with said scooping plates and annular chambers within the drum, independently of the drum motion, whereby washing of muddy sand with water and draining of the washings are repeated a plurality of times.
The present invention will be further illustrated by way of the accompanying drawings, wherein:
Fig. 1 is a front elevational view of a sand washer embodying the invention;
Fig. 2 is a vertical sectional view of the washer;
Fig. 3 is a side view of the washer as viewed from the right end of Fig. l;
Fig. 4 is a sectional view taken on the line A-A of Fig. 2, and Fig. S is a sectional view taken on the line B-B of Fig. 2.
The drum body 1 of the sand washer according to this invention, as better shown in Fig. 2, includes two circular plates 2, 3 at both ends having center openings, respectively. One of the openings serves as an inlet 4 for charging muddy sand into , 7~'
1~)57703 1~
According to the present invention there is provided a sand washer for washing muddy sand comprising a drum mounted for rotation on a plurality of rollers, means for charging said drum with said muddy sand through an inlet means for supplying wash water to said drum through an inlet, a plurality of annular chambers formed in the drum, a plurality of scooping plates dis-posed within each of said annular chambers, draining members provided in said scooping plates, chutes secured to a base and disposed between said annular chambers independently of drum motion, a plurality of lengths of band steel helically coiled along, and secured to, the inner wall surface of a section of said drum close to said sand inlet, scooping plates located adjacent terminating ends of said helical lengths of band steel, and a chute secured to the base and associated with said scooping plates and annular chambers within the drum, independently of the drum motion, whereby washing of muddy sand with water and draining of the washings are repeated a plurality of times.
The present invention will be further illustrated by way of the accompanying drawings, wherein:
Fig. 1 is a front elevational view of a sand washer embodying the invention;
Fig. 2 is a vertical sectional view of the washer;
Fig. 3 is a side view of the washer as viewed from the right end of Fig. l;
Fig. 4 is a sectional view taken on the line A-A of Fig. 2, and Fig. S is a sectional view taken on the line B-B of Fig. 2.
The drum body 1 of the sand washer according to this invention, as better shown in Fig. 2, includes two circular plates 2, 3 at both ends having center openings, respectively. One of the openings serves as an inlet 4 for charging muddy sand into , 7~'
- 3~
~OS'77~3 the drum body, and the other opening as an outlet 5 for discharging cleaned sand. The space inside the drum is roughly divided into two sections. In the section on the left as viewed in Fig. 2, a plurality of lengths of band steel 6 are helically coiled and welded to the inner wall surface of the drum, thus forming grooves 7 therebetween. The band-and-groove structure is intended to constitute a built-in screw conveyor, the bands serving as helical blades. The muddy sand introduced into this section is conveyed rightward while being washed with water. The lengths of band steel 6 terminate at points of the inner surface of the drum (in the center of the body as in Fig. 2) f ,,~, - 3a -where a plurality of scooping plates 8 are extended axially of the vessel and welded thereto adjacent the ends of the grooves 7. The scooping plates 8, as shown .in Fig. 4, take up the conveyed sand in succession and carry it upward until the charge in the upper part of the drum will fall onto a chute located below for transfer to the ne~t washing cycle.
. Although the SCOOpillg plates 8 are shown held apart from the inner wall surface, with the gaps covered by drain nets 9, this arrangement is not essential. Full-width scooping plates may be employed to eliminate the nets. The numeral 10 designates a first chute. The other, right-hand section of the drum body 1 has three circular partition plates 11, 12, 13 formed with circular center openings 14, lS, 16, respectively. The diameters of these openings are gradually increased in the flow direction of washing water, or leftward as viewed in Fig. 2. The inner wall surface of the drum body 1 combines with the circular plates 11, 12, 13 and the right end plate 3 to form first, second, and third annular chambers 17, 18, 19. As typically shown in Fig. 5, each of the chambers 17, 18, 19 has a plurality of scooping plates 20, 21, or 22, welded to the inner wall surface of the drum body. The circular plates 11, 12, 13 and scooping plates 20, 21, 22 are combined to divide the annular chambers 17, 18, 19 into groups~of sub-chambers 23, 24, 25, respectively.
In the same manner as with the scooping plates 8, the plates 20, 21, 22 are provided with drain nets 26, 27, 28.
The drum body 1 rests on pairs of rollers 32, 33 supported by bearings 30, 31, respectively, which in turn ~0$7703 are mounted on a base 29. Shafts 34, 35 of the rollers 32, 33 carry at both ends sprockets or pulleys 36, 37, and the rollers are jointly driven by chains or V belts 38 extended around these sprockets or pulleys. A motor 42 is drivingly coupled to the rollers 33 through a pulley 39 on one end of the roller shaft 34, a V belt 40, and a motor pulley 41.
On the l~ase 29 are held upright two pairs of posts
~OS'77~3 the drum body, and the other opening as an outlet 5 for discharging cleaned sand. The space inside the drum is roughly divided into two sections. In the section on the left as viewed in Fig. 2, a plurality of lengths of band steel 6 are helically coiled and welded to the inner wall surface of the drum, thus forming grooves 7 therebetween. The band-and-groove structure is intended to constitute a built-in screw conveyor, the bands serving as helical blades. The muddy sand introduced into this section is conveyed rightward while being washed with water. The lengths of band steel 6 terminate at points of the inner surface of the drum (in the center of the body as in Fig. 2) f ,,~, - 3a -where a plurality of scooping plates 8 are extended axially of the vessel and welded thereto adjacent the ends of the grooves 7. The scooping plates 8, as shown .in Fig. 4, take up the conveyed sand in succession and carry it upward until the charge in the upper part of the drum will fall onto a chute located below for transfer to the ne~t washing cycle.
. Although the SCOOpillg plates 8 are shown held apart from the inner wall surface, with the gaps covered by drain nets 9, this arrangement is not essential. Full-width scooping plates may be employed to eliminate the nets. The numeral 10 designates a first chute. The other, right-hand section of the drum body 1 has three circular partition plates 11, 12, 13 formed with circular center openings 14, lS, 16, respectively. The diameters of these openings are gradually increased in the flow direction of washing water, or leftward as viewed in Fig. 2. The inner wall surface of the drum body 1 combines with the circular plates 11, 12, 13 and the right end plate 3 to form first, second, and third annular chambers 17, 18, 19. As typically shown in Fig. 5, each of the chambers 17, 18, 19 has a plurality of scooping plates 20, 21, or 22, welded to the inner wall surface of the drum body. The circular plates 11, 12, 13 and scooping plates 20, 21, 22 are combined to divide the annular chambers 17, 18, 19 into groups~of sub-chambers 23, 24, 25, respectively.
In the same manner as with the scooping plates 8, the plates 20, 21, 22 are provided with drain nets 26, 27, 28.
The drum body 1 rests on pairs of rollers 32, 33 supported by bearings 30, 31, respectively, which in turn ~0$7703 are mounted on a base 29. Shafts 34, 35 of the rollers 32, 33 carry at both ends sprockets or pulleys 36, 37, and the rollers are jointly driven by chains or V belts 38 extended around these sprockets or pulleys. A motor 42 is drivingly coupled to the rollers 33 through a pulley 39 on one end of the roller shaft 34, a V belt 40, and a motor pulley 41.
On the l~ase 29 are held upright two pairs of posts
4~ and 44~ and two beams 45 are extended through the drum body 1 and are supported at both ends by the posts. As shown in Fig. 2~ the beams 45 provide a support for a trough 46 for charging muddy sand into the drum body, and also for the first chute 10, second chute 47, third chute 48, and fourth chute 49 arranged within the drum body 1 to receive the sand taken up by the scooping plates 8, 20, 21, 22 and caused to fall gravitationally from the upper part of the drum, and to carry the sand over to the next washing cycle. A belt con-veyor 50 is located outside and below the outlet 5 of the drum body so as to convey the washed sand to an open storage yard. The numeral 51 indicates a pipe for pouring washing 20 water into the drum body 1, and 52 denotes a baffle plate.
The sand washer according to this invention operates in the following way. In preparation for the operation, the motor 42 is started ar.d its power is transmitted through the pulley 41, v belt 40, and pulley 39 to rotate the rollers 25 33. ~t the same time, the turning force is transmitted through the sprockets or pulleys 37, chains or V belts 38, and sprockets or pulleys 36 to the rollers 32. This causes the drum body 1 resting on the rollers 32, 33 to revolve, ~057 7()3 too. Then the belt conveyor 50 is started and washing water is introduced through the pipe 51 into the drum body 1. The sand washer is now ready for the washing operation, and muddy sand is charged through the trough 46 into the drum S body 1. The muddy sand introduced via the trough 46 first falls into the first annular chamber 17 and the mud is washed away by the water rlowing therethrough, and the sand is taken up by the scooping plates 20 and is carried to the upper part of the drum body while the washings are be;ng drained off through the nets 26. Upon arrival at the highest point within the drum body, the sand falls by gravity onto the second chute 47. The sand then slides into the second annular chamber 18 for the next washing cycle. In the second chamber it is washed in the same manner and taken up by the scooping plates 21 to the upper part of the drum body. Throughout this period the sand is again drained of water by the nets 27 of the ~cooping plates 21. From the uppermost point inside the drum body the sand falls onto the third chute 48.
(Refer to FIG. 5.) The sand then slides into the third annular chamber 19, where it is again washed in the same way as above described. Finally, the sand falls from the upper part of the drum body 1 onto the fourth chute 49 and thence onto the belt conveyor 50 for transport to an outdoor storage yard. On the other hand, the portion of muddy sand flown back by the force of the washing water flow to the left-hand section of the drum body 1 as viewed in FIG 2 is conveyed rightward by the screw conveyor action o~ the band steel 6, while being washed in that section. At the J
10577(~3 end of the section the sand is scooped by the scoopin~ plates 8 and is then dropped onto the first chute 10, as shown in FIG. 4, for transfer to the second annular chamber 18.
As has been described hereinbefore, the sand washer of the present invention achieves a very high washing effect because of several washes and dra:ins repeated. The plurality of cycles are accomplished by mere revolution of the drum with a remarkable saving of labor.
The sand washer according to this invention operates in the following way. In preparation for the operation, the motor 42 is started ar.d its power is transmitted through the pulley 41, v belt 40, and pulley 39 to rotate the rollers 25 33. ~t the same time, the turning force is transmitted through the sprockets or pulleys 37, chains or V belts 38, and sprockets or pulleys 36 to the rollers 32. This causes the drum body 1 resting on the rollers 32, 33 to revolve, ~057 7()3 too. Then the belt conveyor 50 is started and washing water is introduced through the pipe 51 into the drum body 1. The sand washer is now ready for the washing operation, and muddy sand is charged through the trough 46 into the drum S body 1. The muddy sand introduced via the trough 46 first falls into the first annular chamber 17 and the mud is washed away by the water rlowing therethrough, and the sand is taken up by the scooping plates 20 and is carried to the upper part of the drum body while the washings are be;ng drained off through the nets 26. Upon arrival at the highest point within the drum body, the sand falls by gravity onto the second chute 47. The sand then slides into the second annular chamber 18 for the next washing cycle. In the second chamber it is washed in the same manner and taken up by the scooping plates 21 to the upper part of the drum body. Throughout this period the sand is again drained of water by the nets 27 of the ~cooping plates 21. From the uppermost point inside the drum body the sand falls onto the third chute 48.
(Refer to FIG. 5.) The sand then slides into the third annular chamber 19, where it is again washed in the same way as above described. Finally, the sand falls from the upper part of the drum body 1 onto the fourth chute 49 and thence onto the belt conveyor 50 for transport to an outdoor storage yard. On the other hand, the portion of muddy sand flown back by the force of the washing water flow to the left-hand section of the drum body 1 as viewed in FIG 2 is conveyed rightward by the screw conveyor action o~ the band steel 6, while being washed in that section. At the J
10577(~3 end of the section the sand is scooped by the scoopin~ plates 8 and is then dropped onto the first chute 10, as shown in FIG. 4, for transfer to the second annular chamber 18.
As has been described hereinbefore, the sand washer of the present invention achieves a very high washing effect because of several washes and dra:ins repeated. The plurality of cycles are accomplished by mere revolution of the drum with a remarkable saving of labor.
Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A sand washer for washing muddy sand comprising a drum mounted for rotation on a plurality of rollers, means for charging said drum with said muddy sand through an inlet means for supplying wash water to said drum through an inlet, a plurality of annular chambers formed in the drum, a plurality of scooping plates disposed within each of said annular chambers, draining members provided in said scooping plates, chutes secured to a base and disposed between said annular chambers independently of drum motion, a plurality of lengths of band steel helically coiled along, and secured to, the inner wall surface of a section of said drum close to said sand inlet, scooping plates located adjacent terminating ends of said helical lengths of band steel, and a chute secured to the base and associated with said scooping plates and annular chambers within the drum, independently of the drum motion, whereby washing of muddy sand with water and draining of the washings are repeated a plurality of times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA256,428A CA1057703A (en) | 1976-07-06 | 1976-07-06 | Scooping drum type sand washer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA256,428A CA1057703A (en) | 1976-07-06 | 1976-07-06 | Scooping drum type sand washer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1057703A true CA1057703A (en) | 1979-07-03 |
Family
ID=4106381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA256,428A Expired CA1057703A (en) | 1976-07-06 | 1976-07-06 | Scooping drum type sand washer |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1057703A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106807537A (en) * | 2015-12-01 | 2017-06-09 | 衡阳双雁运输机械有限公司 | A kind of efficient sand washer |
-
1976
- 1976-07-06 CA CA256,428A patent/CA1057703A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106807537A (en) * | 2015-12-01 | 2017-06-09 | 衡阳双雁运输机械有限公司 | A kind of efficient sand washer |
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