Screening device for building materials and using method

Abstract

The invention relates to a screening device for building materials and a using method.The screening device comprises a bottom plate, two outer supports are oppositely arranged on the bottom plate, an inner screen drum is rotationally connected between the two outer supports, and the inner screen drum comprises a feeding washing part, a screening part and a coarse material output part which are sequentially connected; the feeding washing part and the coarse material output part penetrate through the two outer supports respectively, screen holes are distributed in the screening part, supporting parts are arranged on the inner sides of the two outer supports, an outer screen drum coaxial with the inner screen drum is rotationally connected to the supporting parts, spiral conveying belts are arranged on the inner side walls of the outer screen drum and the inner screen drum respectively, and the spiral conveying belts are connected with the outer screen drum. Filter holes are distributed in the outer screen drum, and a driving device for driving the outer screen drum and the inner screen drum to rotate reversely is arranged on the bottom plate; according to the device, the situation that gravel with the actual small particle size is mixed into gravel with the large particle size due to the effect of clay during screening is avoided, the gravel separation effect is improved, and then the quality and durability of building materials are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sand and gravel screening, and in particular to a screening device for building materials and a use method thereof. Background Art

[0002] Building materials are various materials used in construction projects. There are many types of building materials, which can be roughly divided into: (1) Inorganic materials, which include metal materials (including ferrous metal materials and non-ferrous metal materials) and non-metal materials (such as natural stone, burnt earth products, cement, concrete and silicate products, etc.). (2) Organic materials, which include plant materials, synthetic polymer materials (including plastics, coatings, adhesives) and asphalt materials. (3) Composite materials, which include asphalt concrete, polymer concrete, etc., are generally composed of inorganic non-metallic materials and organic materials.

[0003] Sand and gravel are often used as high-quality building materials and concrete raw materials due to their good hardness and stable chemical properties. They are widely used in housing, roads, highways, railways, engineering and other fields. The particle size of sand and gravel has a direct impact on the overall performance of the building. Therefore, how to efficiently and accurately screen out sand and gravel that meet the requirements has become a problem that must be solved in construction projects. Sand and gravel screening devices for building materials came into being and became a key tool to solve this problem. In the construction industry, sand and gravel screening devices are mainly used in concrete, railway construction, road construction, foundation engineering and simple construction. By screening sand and gravel of different particle sizes, the quality and durability of building materials can be improved.

[0004] In actual use of existing sand and gravel screening devices for building materials, a large amount of clay will adhere to the surface of the sand and gravel, which will increase the particle size of the sand and gravel. Sand and gravel with smaller particle sizes will be mixed with sand and gravel with larger particle sizes during screening due to the effect of clay, reducing the separation effect and thus affecting the quality and durability of building materials. Summary of the invention

[0005] The embodiment of the present invention provides a screening device for building materials and a method of use, which can solve the problem in the prior art that sand and gravel with actually smaller particle sizes will be mixed into sand and gravel with larger particle sizes during screening due to the effect of clay, thereby reducing the separation effect and further affecting the quality and durability of building materials.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a screening device for building materials and a method of using the same, comprising a bottom plate, two outer brackets are arranged opposite to each other on the bottom plate, an inner screen drum is rotatably connected between the two outer brackets, the inner screen drum comprises a feed flushing part, a screening part and a coarse material output part which are connected in sequence, the feed flushing part and the coarse material output part respectively penetrate the two outer brackets, the screening part is provided with screen holes, a support part is arranged on the inner side of the two outer brackets, an outer screen drum which is arranged coaxially with the inner screen drum is rotatably connected on the support part, spiral conveyor belts are arranged on the inner side walls of the outer screen drum and the inner screen drum respectively, filtering holes are arranged on the outer screen drum, and a driving device which drives the outer screen drum and the inner screen drum to rotate in the opposite direction is arranged on the bottom plate;

[0007] The bottom plate is provided with a water pump whose water inlet is connected to an external water source, the water outlet of the water pump is provided with a water outlet pipe extending into the feed flushing part, and the part of the water outlet pipe located in the feed flushing part is provided with a plurality of nozzles.

[0008] Preferably, the supporting portion includes two relatively arranged inner brackets and an outer cavity fixedly connected to the two inner brackets, the outer sieve cylinder is sealed and rotatably connected to the outer cavity, and the outer sieve cylinder passes through both ends of the outer cavity, the filter holes are arranged on the part of the outer sieve cylinder surrounded by the outer cavity, and a sewage pipe is arranged on the outer cavity.

[0009] Preferably, the driving device includes a driving part installed on the base plate, and a driving sprocket is provided at the output end of the driving part, a first gear is rotatably connected to one of the brackets, a first outer gear ring meshing with the first gear is provided on the outer wall of the outer screen cylinder, a driven sprocket is coaxially provided with the first gear, and a chain is transmission-connected between the driving sprocket and the driven sprocket.

[0010] Preferably, the driving device also includes a second outer gear ring arranged on the outer wall of the coarse material output part, the outer screen cylinder is provided with an inner gear ring corresponding to the inner gear ring, and a second gear that is rotatably connected to the bracket on the same side as the second outer gear ring and meshes with both the inner gear ring and the second outer gear ring is simultaneously provided.

[0011] Preferably, a plurality of the second gear annular arrays are provided.

[0012] Preferably, the water pump comprises a piston cylinder arranged on a bottom plate, a piston is slidably connected to the interior of the piston cylinder, a piston rod extending from the piston cylinder is arranged on the piston, and the water inlet and the water outlet are both arranged on the piston cylinder.

[0013] Preferably, the water pump further comprises two one-way valves, and the two one-way valves are respectively arranged at the water inlet and the water outlet on the piston cylinder.

[0014] Preferably, the water pump further comprises a disc coaxially arranged with the first gear, a connecting rod is eccentrically rotatably connected to the disc, and one end of the connecting rod is hinged to the piston rod.

[0015] Preferably, a plurality of spherical protrusions are arranged in an annular array on the outer wall of the outer screen cylinder, a guide cylinder corresponding to the spherical protrusions is arranged on the inner wall of the outer cavity, a hammer rod extending out of the guide cylinder is slidably connected inside the guide cylinder, and an elastic member is arranged between the hammer rod and the inner bottom wall of the guide cylinder.

[0016] Compared with the prior art, the present invention is provided with a bottom plate, an outer bracket, an inner screen drum, screen holes, a support part, an outer screen drum, a spiral conveyor belt, a filter hole, a driving device, a water pump, a water outlet pipe and a nozzle. The driving device drives the inner screen drum and the outer screen drum to rotate in opposite directions. The water pump conveys water from an external water source to each nozzle through the water outlet pipe and sprays it out. The sand and gravel to be screened enter the inner screen drum from the feed flushing part. The sand and gravel move to the coarse material output part under the conveying action of the spiral conveyor belt in the inner screen drum. During the movement, they are constantly thrown up and dropped. The stones are constantly rubbed against each other. At the feed flushing part, the sand and gravel are The clay adhering to the surface of the sand and gravel is washed off by flushing water, and the washed sand and gravel enter the screening part, where the sewage and small-sized stones pass through the sieve holes into the outer sieve drum, and the large-sized stones are discharged from the coarse material output part. The small-sized stones move in the opposite direction under the conveying action of the spiral conveyor belt on the inner wall of the outer sieve drum, and are finally discharged from the end of the outer sieve drum. The sewage is separated through the filter holes, which prevents the sand and gravel with actually smaller particle size from being mixed into the sand and gravel with larger particle size during screening due to the action of clay, thereby improving the sand and gravel separation effect, and thus improving the quality and durability of building materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the side structure of the bracket of the present invention;

[0020] Figure 4 It is a schematic diagram of the transmission structure of the outer sieve drum and the inner sieve drum of the present invention;

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the outer cavity of the present invention;

[0022] Figure 6 For the present invention Figure 2 A schematic diagram of the enlarged structure in the middle.

[0023] In the figure: 1, bottom plate; 2, outer bracket; 3, support part; 301, inner bracket; 302, outer cavity; 4, inner screen cylinder; 401, feed flushing part; 402, screening part; 403, coarse material output part; 5, outer screen cylinder; 6, inner gear ring; 7, second outer gear ring; 8, second gear; 9, spiral conveyor belt; 10, piston cylinder; 11, water outlet pipe; 12, nozzle; 13, sewage pipe; 14, filter hole; 15, driving sprocket; 16, first gear; 17, driven sprocket; 18, chain; 19, first outer gear ring; 20, piston; 21, piston rod; 22, disc; 23, connecting rod; 24, spherical protrusion; 25, guide cylinder; 26, hammer rod; 27, elastic member; 28, sieve hole; 29, driving part. DETAILED DESCRIPTION

[0024] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figure 1 to Figure 6 As shown, a screening device for building materials and a method of using the same include a bottom plate 1, two outer brackets 2 are arranged on the bottom plate 1, an inner screen drum 4 is rotatably connected between the two outer brackets 2, the inner screen drum 4 includes a feed flushing portion 401, a screening portion 402 and a coarse material output portion 403 which are connected in sequence, the feed flushing portion 401 and the coarse material output portion 403 respectively penetrate the two outer brackets 2, the screening portion 402 is provided with screen holes 28, a support portion 3 is arranged on the inner side of the two outer brackets 2, an outer screen drum 5 which is coaxially arranged with the inner screen drum 4 is rotatably connected to the support portion 3, spiral conveyor belts 9 are respectively arranged on the inner side walls of the outer screen drum 5 and the inner screen drum 4, filtering holes 14 are arranged on the outer screen drum 5, and a driving device for driving the outer screen drum 5 and the inner screen drum 4 to rotate in the opposite direction is arranged on the bottom plate 1;

[0026] A water pump whose water inlet is connected to an external water source is arranged on the bottom plate 1 , and a water outlet of the water pump is provided with a water outlet pipe 11 extending into the feed flushing part 401 , and a portion of the water outlet pipe 11 located in the feed flushing part 401 is provided with a plurality of nozzles 12 .

[0027] When in use, the driving device drives the inner screen drum 4 and the outer screen drum 5 to rotate in the opposite direction, and the water pump conveys water from the external water source to each nozzle 12 through the water outlet pipe 11 and sprays it out, and the sand and gravel to be screened enter the inner screen drum 4 from the feed flushing part 401, and the sand and gravel are transported by the spiral conveyor belt 9 in the inner screen drum 4 to the coarse material output part 403. During the movement, they are constantly thrown up and dropped, and the stones are constantly rubbed against each other. At the feed flushing part 401, the sand and gravel are washed by the flushing water, and the clay adhered to the surface of the sand and gravel is washed off, and the washed sand and gravel are The material enters the screening section 402, in which sewage and small-size stones pass through the sieve holes 28 and enter the outer sieve drum 5, and large-size stones are discharged from the coarse material output section 403, and the small-size stones move in the opposite direction under the conveying action of the spiral conveyor belt 9 on the inner wall of the outer sieve drum 5, and are finally discharged from the end of the outer sieve drum 5, and the sewage is separated through the filter holes 14, which prevents sand and gravel with actually smaller particle sizes from being mixed into sand and gravel with larger particle sizes during screening due to the action of clay, thereby improving the sand and gravel separation effect, and thereby improving the quality and durability of building materials.

[0028] In order to achieve a better separation effect of sewage and small-size stone, preferably, the support part 3 includes two relatively arranged inner brackets 301 and an outer cavity 302 fixedly connected to the two inner brackets 301, the outer sieve drum 5 is sealed and rotatably connected to the outer cavity 302, and the outer sieve drum 5 passes through both ends of the outer cavity 302, the filter holes 14 are arranged on the part of the outer sieve drum 5 surrounded by the outer cavity 302, and a sewage pipe 13 is arranged on the outer cavity 302. The sewage and small-size stone entering the outer sieve drum 5 are conveyed by the spiral conveyor belt 9 on the inner wall of the outer sieve drum 5. The sewage passes through the filter holes 14 into the outer cavity 302, and is discharged from the sewage pipe 13 under the diversion effect of the outer cavity 302. The sewage pipe 13 can be connected to sewage treatment equipment to treat the sewage for secondary utilization. The filter holes 14 are surrounded by the outer cavity 302, which is beneficial to improving the sewage collection rate and the separation effect from small-size stone.

[0029] Preferably, the driving device includes a driving part 29 installed on the base plate 1, and the driving part 29 is preferably a motor. A driving sprocket 15 is provided at the output end of the driving part 29, and a first gear 16 is rotatably connected to one of the brackets 2. A first outer gear ring 19 meshing with the first gear 16 is provided on the outer wall of the outer screen drum 5, and a driven sprocket 17 is coaxially provided with the first gear 16. A chain 18 is transmission-connected between the driving sprocket 15 and the driven sprocket 17, a second outer gear ring 7 is provided on the outer wall of the coarse material output part 403, and an inner gear ring 6 corresponding to the second outer gear ring 7 is provided on the outer screen drum 5, and a plurality of second gears 8 meshing with the inner gear ring 6 and the second outer gear ring 7 at the same time are rotatably connected to the bracket 2 on the same side as the second outer gear ring 7.

[0030] When in use, the motor drives the driving sprocket 15 to rotate, the driving sprocket 15 drives the driven sprocket 17 to rotate through the chain 18, the driven sprocket 17 drives the first gear 16 to rotate, the first gear 16 drives the outer sieve drum 5 to rotate through the first outer gear ring 19, the outer sieve drum 5 drives the second gear 8 to rotate through the inner gear ring 6, the second gear 8 drives the inner sieve drum 4 to rotate in the opposite direction relative to the outer sieve drum 5 through the inner gear ring 6, so that large-size stones are discharged from the coarse material output part 403, and small-size stones are discharged from the opposite end of the outer sieve drum 5, so that large-size stones are separated from small-size stones.

[0031] Preferably, the water pump includes a piston cylinder 10 arranged on the base plate 1, a piston 20 is slidably connected to the inside of the piston cylinder 10, a piston rod 21 extending from the piston cylinder 10 is arranged on the piston 20, a water inlet and a water outlet are both arranged on the piston cylinder 10, a one-way valve is arranged at the water inlet and the water outlet of the piston cylinder 10, a disc 22 is coaxially arranged on the first gear 16, a connecting rod 23 is eccentrically connected to the disc 22, and one end of the connecting rod 23 is hinged to the piston rod 21.

[0032] When in use, the motor drives the active sprocket 15 to rotate, the active sprocket 15 drives the driven sprocket 17 to rotate through the chain 18, the driven sprocket 17 drives the disc 22 to rotate, the disc 22 drives the connecting rod 23 to rotate eccentrically, and the connecting rod 23 drives the piston 20 to perform piston movement inside the piston 20 through the piston rod 21. The one-way valve at the water inlet only allows flushing water to flow from the external water source to the piston cylinder 10, and the one-way valve at the water outlet only allows flushing water to flow from the piston cylinder 10 to the nozzle 12, thereby continuously delivering flushing water in the external water source to the nozzle 12 for cleaning sand and gravel.

[0033] Preferably, a plurality of circles of spherical protrusions 24 are arranged in an annular array on the outer wall of the outer sieve cylinder 5, and a guide cylinder 25 corresponding to the spherical protrusions 24 is arranged on the inner wall of the outer cavity 302. A hammer rod 26 extending out of the guide cylinder 25 is slidably connected inside the guide cylinder 25, and an elastic member 27 is arranged between the hammer rod 26 and the inner bottom wall of the guide cylinder 25. The elastic member 27 is a spring or a spring sheet. During the rotation of the outer sieve cylinder 5, the spherical protrusions 24 will be driven to continuously impact and extrude the hammer rod 26. The compressed hammer rod 26 squeezes the elastic member 27, so that the elastic member 27 obtains elastic potential energy. In the gap where the spherical protrusion 24 and the hammer rod 26 are separated, the hammer rod 26 is reset and impacts the outer sieve cylinder 5 under the action of the elastic potential energy of the elastic member 27, and the sludge adhered to the outer sieve cylinder 5 is knocked off, thereby improving the permeability of the filter hole 14, separating the sewage from the small-size sand and gravel in time, and improving the separation effect.

[0034] Compared with the prior art, the present invention is provided with the coordination of the bottom plate 1, the outer bracket 2, the inner screen drum 4, the screen hole 28, the support part 3, the outer screen drum 5, the spiral conveyor belt 9, the filter hole 14, the driving device, the water pump, the water outlet pipe 11 and the nozzle 12. The driving device drives the inner screen drum 4 and the outer screen drum 5 to rotate in the opposite direction. The water pump conveys the water from the external water source to each nozzle 12 through the water outlet pipe 11 and sprays it out. The sand and gravel to be screened enter the inner screen drum 4 from the feed flushing part 401. The sand and gravel move to the coarse material output part 403 under the conveying action of the spiral conveyor belt 9 in the inner screen drum 4. During the movement, the sand and gravel are constantly thrown up and dropped. The stones are constantly rubbed against each other. The sand and gravel at 401 are washed by flushing water, and the clay adhered to the surface of the sand and gravel is washed off, and the washed sand and gravel enter the screening part 402. In the screening part 402, sewage and small-sized stones pass through the sieve holes 28 into the outer sieve drum 5, and large-sized stones are discharged from the coarse material output part 403. The small-sized stones move in the opposite direction under the conveying action of the spiral conveyor belt 9 on the inner wall of the outer sieve drum 5, and are finally discharged from the end of the outer sieve drum 5. The sewage is separated through the filter holes 14, which prevents the sand and gravel with actually smaller particle size from being mixed into the sand and gravel with larger particle size during screening due to the action of clay, thereby improving the sand and gravel separation effect, and further improving the quality and durability of building materials.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screening device for building materials and a method of use, comprising a base plate (1), characterized in that: Two outer supports (2) are arranged on the bottom plate (1) in a relative manner, an inner sieve drum (4) is rotatably connected between the two outer supports (2), the inner sieve drum (4) comprises a feed flushing portion (401), a screening portion (402) and a coarse material output portion (403) which are connected in sequence, the feed flushing portion (401) and the coarse material output portion (403) respectively passing through the two outer supports (2), the screening portion (402) is provided with sieve holes (28), a support portion (3) is arranged on the inner side of the two outer supports (2), an outer sieve drum (5) which is arranged coaxially with the inner sieve drum (4) is rotatably connected to the support portion (3), spiral conveyor belts (9) are respectively arranged on the inner side walls of the outer sieve drum (5) and the inner sieve drum (4), filtering holes (14) are arranged on the outer sieve drum (5), and a driving device for driving the outer sieve drum (5) and the inner sieve drum (4) to rotate in opposite directions is arranged on the bottom plate (1); The bottom plate (1) is provided with a water pump whose water inlet is connected to an external water source, and the water outlet of the water pump is provided with a water outlet pipe (11) extending into the feed flushing portion (401), and the portion of the water outlet pipe (11) located in the feed flushing portion (401) is provided with a plurality of nozzles (12).

2. The building material screening device and method of use according to claim 1, characterized in that: The support portion (3) comprises two inner supports (301) arranged opposite to each other and an outer cavity (302) fixedly connected to the two inner supports (301); the outer sieve cylinder (5) is connected to the outer cavity (302) in a sealed and rotatable manner, and the outer sieve cylinder (5) passes through both ends of the outer cavity (302); the filter holes (14) are arranged on the portion of the outer sieve cylinder (5) surrounded by the outer cavity (302); and a sewage discharge pipe (13) is arranged on the outer cavity (302).

3. The building material screening device and method of use according to claim 2, characterized in that: The driving device comprises a driving part (29) mounted on a base plate (1), an output end of the driving part (29) being provided with a driving sprocket (15), one of the brackets (2) being rotatably connected to a first gear (16), an outer wall of the outer screen drum (5) being provided with a first outer gear ring (19) meshing with the first gear (16), a driven sprocket (17) being coaxially provided with the first gear (16), and a chain (18) being transmission-connected between the driving sprocket (15) and the driven sprocket (17).

4. The building material screening device and method of use according to claim 3, characterized in that: The driving device also includes a second outer gear ring (7) arranged on the outer wall of the coarse material output part (403), the outer screen drum (5) is provided with an inner gear ring (6) corresponding to the inner gear ring (6), and a second gear (8) is rotatably connected to the bracket (2) on the same side as the second outer gear ring (7) and meshes with both the inner gear ring (6) and the second outer gear ring (7).

5. The building material screening device and the method of use according to claim 4, characterized in that: A plurality of the second gears (8) are arranged in a ring array.

6. The building material screening device and method of use according to claim 5, characterized in that: The water pump comprises a piston cylinder (10) arranged on a bottom plate (1), a piston (20) being slidably connected inside the piston cylinder (10), a piston rod (21) extending from the piston cylinder (10) being arranged on the piston (20), and the water inlet and the water outlet are both arranged on the piston cylinder (10).

7. The building material screening device and method of use according to claim 6, characterized in that: The water pump further comprises two one-way valves, which are respectively arranged at the water inlet and the water outlet on the piston cylinder (10).

8. The building material screening device and method of use according to claim 7, characterized in that: The water pump further comprises a disc (22) coaxially arranged with the first gear (16), a connecting rod (23) being eccentrically rotatably connected to the disc (22), and one end of the connecting rod (23) being hinged to the piston rod (21).

9. The building material screening device and method of use according to claim 8, characterized in that: A plurality of spherical protrusions (24) are arranged in an annular array on the outer wall of the outer sieve cylinder (5); a guide cylinder (25) corresponding to the spherical protrusions (24) is arranged on the inner wall of the outer cavity (302); a hammer rod (26) extending out of the guide cylinder (25) is slidably connected inside the guide cylinder (25); and an elastic member (27) is arranged between the hammer rod (26) and the inner bottom wall of the guide cylinder (25).

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