A dust-removing and noise-reducing sand screening device

Abstract

The present invention discloses a dust and noise reduction sand screening device with a simple structure, being economical and practical, easy to operate, having high efficiency, and various working forms, which includes a housing, an outer cover, a feed inlet, a bracket, an adjusting device, a screening device located inside the housing, a dust reduction device, a noise reduction device, and a motor providing power; the dust reduction device includes a water spray hole, a sealing ring, a water channel, and a water inlet pipe, and the water spray hole and the water channel connected to the water spray hole are arranged in the wall of the feed inlet; the noise reduction device includes a porous ring, a side ring, and a multi-layer board. The inner surface of the outer cover is fixedly connected with the porous ring, the top of the porous ring is provided with the side ring, and the outer surface of the side ring is fixedly connected with the multi-layer board. The side ring and the porous ring are vertically and linearly arranged along the inner surface of the outer cover. The present invention solves the problems of excessive dust and excessive noise during the sand screening process.

Description

Technical Field

[0001] The present invention belongs to the technical field of sand screening, and more specifically, relates to a dust-reducing and noise-reducing sand screening device. Background Art

[0002] Sand screening is applicable to sand and stone separation equipment in river channels, reservoirs, and coal yards. It consists of a frame, a speed reducer, a conveyor belt, a rotary sieve, an engine or a motor. However, in the prior art, when the traditional sand screening machine is used for sand screening in construction, due to the high-frequency shaking of mechanical equipment, a large amount of noise and dust will be generated during use, which will cause greater pollution to the environment and affect the health of operators. Moreover, the traditional sand screening machine mostly adopts horizontal vibration, imitating the human hand. Although this method can achieve a certain sand screening effect, due to the single working form, the sand screening efficiency is relatively low.

[0003] Therefore, there is a need for a dust-reducing and noise-reducing sand screening device with a simple structure, economic practicality, easy operation, high efficiency, and diverse working forms. Summary of the Invention

[0004] In view of the above defects or improvement requirements of the prior art, the present invention provides a dust-reducing and noise-reducing sand screening device with a simple structure, economic practicality, easy operation, high efficiency, and diverse working forms, which is characterized in that:

[0005] It includes a housing, an outer cover, a feed inlet, a bracket, an adjusting device, a screening device located inside the housing, a dust-reducing device, a noise-reducing device, and a motor providing power;

[0006] A coarse material port is opened in the outer wall of the housing, the top of the housing is fixedly connected with an outer cover, a funnel-shaped feed inlet is arranged at the top of the outer cover, the bottom of the housing is fixedly connected with a plurality of brackets, and an adjusting device is movably sleeved at the bottom of the housing;

[0007] The adjusting device is arranged inside the screening device and includes a driving shaft, a cam, a fixed inclined plate, a rotating inclined plate, a plug pin, and a tension spring;

[0008] The dust-reducing device includes a water spray hole, a sealing ring, a water channel, and a water inlet pipe. The water spray hole and the water channel connected to the water spray hole are arranged in the wall of the feed inlet; the water inlet pipe is a bent conduit, the bottom end of the water inlet pipe is inserted into the inner wall of the outer cover and connected to the water channel below the water spray hole; a sealing ring is arranged at the bottom of the water inlet pipe;

[0009] The noise-reducing device includes a porous ring, a side ring, and a multi-layer board. The inner surface of the outer cover is fixedly connected with the porous ring, a side ring is arranged at the top of the porous ring, the outer surface of the side ring is fixedly connected with the multi-layer board, and the side ring and the porous ring are vertically linearly arranged along the inner surface of the outer cover.

[0010] Further, a collection ring is provided on the outer surface of the feed inlet. Two holes are opened at the recess of the collection ring, and a return pipe is provided below the holes. The collection ring is connected to the return pipe through the openings, and the bottom end of the return pipe is fixedly connected to and communicated with the water inlet pipe.

[0011] Further, an acceleration ring is provided circumferentially in the wall of the feed inlet. The acceleration ring is located below the water spray holes. The cross-section of the acceleration ring for the water flow to pass through is smaller than that of the water spray holes, and acceleration rings with different cross-section sizes can be selected according to the required water flow velocity at the outlet.

[0012] Further, the screening device includes a sealing plug, a connecting rod, a sieve plate, a compression spring, a sieve cylinder, and a leakage groove. The sealing plug is located above the feed inlet; a connecting rod is fixedly connected to the inner surface of the sealing plug, a sieve plate is fixedly connected to the outer surface of the connecting rod, a compression spring is fixedly connected to the lower surface of the sieve plate, the compression spring is provided at the bottom of the connecting rod, and the bottom end of the compression spring is fixedly connected to the center of the bottom of the sieve cylinder. A number of leakage grooves are opened in the wall of the sieve cylinder.

[0013] Further, the screening device further includes a retaining ring and an inclined ring. The retaining ring is provided on the lower surface of the sieve cylinder, and an inclined ring with a certain inclination angle for the sand and stones to slide out is fixedly connected to the outer surface of the retaining ring.

[0014] Further, the sealing plug is cylindrical, and the end face is larger than the lower opening of the feed inlet. It can fit or separate from the inner surface of the feed inlet as the connecting rod moves; the sieve plate is an inclined upward triangular plate, and a number of openings are provided on the sieve plate. The inner surface of the sieve cylinder and the outer surface of the sieve plate can move relative to each other.

[0015] Further, the upper surface of the fixed inclined plate is fixedly connected to the lower surface of the housing, the lower surfaces of the retaining ring and the inclined ring are slidably connected to the inner surface of the housing, the lower surface of the fixed inclined plate is rotatably connected to the upper surface of the rotating inclined plate, the outer surface of the driving shaft is rotatably connected to the inner surface of the housing, the inner surface of the housing is slidably connected to the lower surface of the cam, and the bottom end of the tension spring is fixedly connected to the upper surface of the cam.

[0016] Further, a fixed inclined plate is provided at the bottom of the inclined ring, a rotating inclined plate is provided at the bottom of the fixed inclined plate, a driving shaft is fixedly connected to the inner surface of the rotating inclined plate, a motor is connected below the driving shaft, a cam is fixedly connected to the outer surface of the driving shaft, a pin is provided on the upper surface of the cam, and a tension spring is provided on the right side of the pin.

[0017] Further, the inner surface of the sieve cylinder is slidably connected to the outer surface of the pin, the top end of the tension spring is rotatably connected to the lower surface of the sieve cylinder, and the bottom end of the connecting rod is slidably connected to the inner surface of the sieve cylinder.

[0018] Generally speaking, compared with the prior art, the above technical solution conceived by the present invention can achieve the following beneficial effects:

[0019] 1. By providing a housing in the present invention, when the device is in use, the bracket fixes the entire device, and the un-screened sand and gravel enter the interior of the housing from the feed port. The outer cover is sleeved on the outer surface of the housing, and the adjustment device screens the incoming sand and gravel. During this process, since a large amount of dust is generated when the sand and gravel enter from the feed port, the water inlet pipe injects fluid water into the area above the sealing ring inside the outer cover. The water is extruded by the acceleration ring. Due to the reduction of the flow cross-section, the water pressure and flow rate increase, and the water mist sprays out from the spray holes. The obliquely upward water mist contacts the rising dust, and the dust combines with the water. The mass of the mixed water droplets increases and they fall downward into the interior of the collection ring. Since the collection ring has an arc-shaped cross-section, the sewage flows along the return pipe into the interior of the water inlet pipe, and then flows through the acceleration ring for the second time. Through the continuous circulation of the water flow, the upward movement of the dust is reduced, solving the problem that a large amount of dust is generated when traditional sand screening equipment is working.

[0020] 2. By providing a housing in the present invention, when the adjustment device is screening, due to the mutual impact and friction of the fragments, a relatively large noise will be generated. The noise generated by the impact of the crushed stones is transmitted outward to the housing, and then is fixedly conducted to the interior of the porous ring. Since a relatively large number of through holes are annularly formed in the wall of the porous ring, and the plate is designed with porous rough edges to increase the movement trajectory of the sound and consume the energy of the sound wave. At the same time, the noise passes through the multi-layer board, and the multi-layer boards obliquely installed on the outer surface of the side ring reflect and fold the sound wave. The noise on the side of the device is absorbed by each board. For the noise at the top of the device, a part of it needs to pass through the flowing water body. Through the flow of the water body, the propagation of the noise is reduced, solving the problem that a relatively large noise is generated when traditional sand screening equipment is working.

[0021] 3. By providing an adjustment device in the present invention, when the device is in use, the drive shaft drives the cam to rotate. The pin at the top of the cam is inserted into the interior of the sieve cylinder in the screening device. Due to the presence of the cam, the sieve cylinder rotates eccentrically horizontally, and the sieve cylinder performs horizontal screening. Since the slopes of the fixed inclined plate and the rotating inclined plate are the same, during the rotation of the drive shaft, the fixed inclined plate and the rotating inclined plate are misaligned with each other and move away from each other. The tension spring assists in resetting, so that while the sieve cylinder rotates eccentrically horizontally, it also shakes up and down by a certain amplitude. On the basis of traditional horizontal screening, vertical screening is added. By increasing the movement form of the device, the sand screening effect is increased. The large pieces of sand and gravel screened out fall outside the device from the coarse material port along the outer surface of the inclined ring. The fine sand falls from the through groove at the bottom of the housing under the restriction of the retaining ring, and the device completes the screening, solving the problem that the movement form of traditional horizontal sand screening machines is single and the screening efficiency is poor.

[0022] 4. The present invention solves the problems of easy floating of internal dust and uncontrollable feeding amount in the traditional through-type sand screening machine by setting a screening device. When the device is in use, the sieve cylinder shakes, and the sand and stones roll down along the upper surface of the leakage plate. The large sand and stones are discharged from the leakage groove to the outside of the sieve cylinder. When the sand and stones fall onto the upper surface of the leakage plate, the self-weight of the leakage plate increases, and the leakage plate moves downward with the connecting rod. The outer surface of the sealing plug blocks the inner surface of the feeding port, and the compression spring is squeezed and contracted. As the sand screening continues, the sand and stones on the top of the leakage plate decrease, the self-weight decreases, the compression spring elongates, and the release of the elastic potential energy pushes the connecting rod to move upward as a whole. The sealing plug is separated from the feeding port, and the device feeds materials. This process is repeated, and the purpose of controlling the material is achieved through intermittent feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the main structural view of a dust-reducing and noise-reducing sand screening device according to an embodiment of the present invention;

[0024] Figure 2 is the structural sectional view of a dust-reducing and noise-reducing sand screening device according to an embodiment of the present invention;

[0025] Figure 3 is the structural schematic diagram of the housing of a dust-reducing and noise-reducing sand screening device according to an embodiment of the present invention;

[0026] Figure 4 is the structural schematic diagram of part B of a dust-reducing and noise-reducing sand screening device according to an embodiment of the present invention;

[0027] Figure 5 is the structural schematic diagram of part A of a dust-reducing and noise-reducing sand screening device according to an embodiment of the present invention;

[0028] Figure 6 is the structural schematic diagram of the adjusting device of a dust-reducing and noise-reducing sand screening device according to an embodiment of the present invention;

[0029] Figure 7 is the structural schematic diagram of part C of a dust-reducing and noise-reducing sand screening device according to an embodiment of the present invention;

[0030] Figure 8 is the structural schematic diagram of the screening device of a dust-reducing and noise-reducing sand screening device according to an embodiment of the present invention.

[0031] In all the drawings, the same reference numerals denote the same technical features, specifically: 1 - housing, 2 - coarse material inlet, 3 - water passage, 4 - support, 5 - adjusting device, 6 - feed inlet, 7 - water spray holes, 8 - collection ring, 9 - return pipe, 10 - water inlet pipe, 11 - sealing ring, 12 - outer cover, 13 - porous ring, 14 - side ring, 15 - multi-layer board, 16 - acceleration ring, 17 - screening device, 18 - retaining ring, 19 - inclined ring, 20 - fixed inclined plate, 21 - rotating inclined plate, 22 - drive shaft, 23 - cam, 24 - pin, 25 - tension spring, 26 - sealing plug, 27 - connecting rod, 28 - leakage plate, 29 - compression spring, 30 - sieve cylinder, 31 - leakage groove, 32 - motor. Detailed implementation manners

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] The present invention provides a dust-removing and noise-reducing sand screening device with a simple structure, economic practicality, easy operation, high efficiency and diverse working forms, which is characterized in that:

[0034] It includes a housing 1, an outer cover 12, a feed inlet 6, a support 4, an adjusting device 5, a screening device 17 located inside the housing, a dust-removing device, a noise-reducing device, and a motor 32 providing power;

[0035] A coarse material inlet 2 is opened in the outer wall of the housing 1, the top of the housing 1 is fixedly connected with an outer cover 12, a funnel-shaped feed inlet 6 is provided at the top of the outer cover 12, the bottom of the housing 1 is fixedly connected with a plurality of supports 4, and an adjusting device 5 is movably sleeved at the bottom of the housing 1;

[0036] The adjusting device 5 is arranged inside the screening device 17 and includes a drive shaft 22, a cam 23, a fixed inclined plate 20, a rotating inclined plate 21, a pin 24 and a tension spring 25;

[0037] The dust-removing device includes water spray holes 7, a sealing ring 11, a water passage 3 and a water inlet pipe 10. The water spray holes 7 and the water passage connected to the water spray holes 7 are arranged in the wall of the feed inlet 6; the water inlet pipe 10 is a bent conduit, the bottom end of the water inlet pipe 10 is inserted into the inner wall of the outer cover 12 and connected to the water passage 3 below the water spray holes 7; a sealing ring 11 is provided at the bottom of the water inlet pipe 10;

[0038] The noise reduction device includes a porous ring 13, a side ring 14, and a multi-layer board 15. The inner surface of the outer cover 12 is fixedly connected with the porous ring 13. A side ring 14 is arranged on the top of the porous ring 13. The outer surface of the side ring 14 is fixedly connected with the multi-layer board 15. The side ring 14 and the porous ring 13 are vertically and linearly arranged along the inner surface of the outer cover 12.

[0039] A collecting ring 8 is arranged on the outer surface of the feed inlet 6. Two holes are opened at the recess of the collecting ring 8. A reflux pipe 9 is arranged below the holes. The collecting ring 8 is communicated with the reflux pipe 9 through the openings. The bottom end of the reflux pipe 9 is fixedly connected with and communicated with the water inlet pipe 10.

[0040] An accelerating ring 16 is arranged circumferentially in the wall of the feed inlet 6. The accelerating ring 16 is located below the water spraying holes 7. The cross-section of the accelerating ring 16 for the water flow to pass through is smaller than that of the water spraying holes. The accelerating ring 16 with different cross-section sizes can be selected according to the water flow rate required at the outlet.

[0041] The screening device 17 includes a sealing plug 26, a connecting rod 27, a leakage plate 28, a compression spring 29, a screening cylinder 30, and a leakage groove 31. The sealing plug 26 is located above the feed inlet 6. The inner surface of the sealing plug 26 is fixedly connected with the connecting rod 27. The outer surface of the connecting rod 27 is fixedly connected with the leakage plate 28. The lower surface of the leakage plate 28 is fixedly connected with the compression spring 29. The compression spring 29 is arranged at the bottom of the connecting rod 27. The bottom end of the compression spring 29 is fixedly connected with the center of the bottom of the screening cylinder 30. A plurality of leakage grooves 31 are opened in the wall of the screening cylinder 30.

[0042] The screening device 17 further includes a retaining ring 18 and an inclined ring 19. The retaining ring 18 is arranged on the lower surface of the screening cylinder 30. The outer surface of the retaining ring 18 is fixedly connected with the inclined ring 19 with a certain inclination angle for the sand and stones to slide out.

[0043] The sealing plug 26 is cylindrical, and the end face is larger than the lower opening of the feed inlet 6. It can be attached to or separated from the inner surface of the feed inlet 6 as the connecting rod 27 moves. The leakage plate 28 is a triangular plate inclined upward. A plurality of openings are arranged on the leakage plate 28. The inner surface of the screening cylinder 30 and the outer surface of the leakage plate 28 can move relative to each other.

[0044] The upper surface of the fixed inclined plate 20 is fixedly connected with the lower surface of the housing 1. The lower surfaces of the retaining ring 18 and the inclined ring 19 are slidably connected with the inner surface of the housing 1. The lower surface of the fixed inclined plate 20 is rotatably connected with the upper surface of the rotating inclined plate 21. The outer surface of the driving shaft 22 is rotatably connected with the inner surface of the housing 1. The inner surface of the housing 1 is slidably connected with the lower surface of the cam 23. The bottom end of the tension spring 25 is fixedly connected with the upper surface of the cam 23.

[0045] A fixed inclined plate 20 is provided at the bottom of the inclined ring 19. A rotating inclined plate 21 is provided at the bottom of the fixed inclined plate 20. A driving shaft 22 is fixedly connected to the inner surface of the rotating inclined plate 21. A motor 25 is connected below the driving shaft. A cam 23 is fixedly connected to the outer surface of the driving shaft 22. A latch 24 is provided on the upper surface of the cam 23. A tension spring 25 is provided on the right side of the latch 24.

[0046] The inner surface of the sieve cylinder 30 is slidably connected to the outer surface of the latch 24. The top end of the tension spring 25 is rotatably connected to the lower surface of the sieve cylinder 30. The bottom end of the connecting rod 27 is slidably connected to the inner surface of the sieve cylinder 30.

[0047] Embodiment 1:

[0048] Please refer to Figure 1 - Figure 8 The present invention provides a technical solution: a dust-removing and noise-reducing sand screening device, including a housing 1. A coarse material inlet 2 is opened in the outer wall of the housing 1. A support 4 is fixedly connected to the lower surface of the housing 1. An adjusting device 5 is movably connected to the inner surface of the housing 1. The housing 1 is connected to a feed inlet 6. A water spraying hole 7 is opened in the wall of the feed inlet 6. A collecting ring 8 is provided at the bottom of the water spraying hole 7. A return pipe 9 is fixedly connected to the inner surface of the collecting ring 8. The bottom end of the return pipe 9 is fixedly connected to a water inlet pipe 10. A sealing ring 11 is provided at the bottom of the water inlet pipe 10. An outer cover 12 is fixedly connected to the outer surface of the sealing ring 11. A porous ring 13 is fixedly connected to the inner surface of the outer cover 12. A side ring 14 is provided at the top of the porous ring 13. A multi-layer board 15 is fixedly connected to the outer surface of the side ring 14. An acceleration ring 16 is provided at the top of the multi-layer board 15.

[0049] The outer surface of the acceleration ring 16 is fixedly connected to the inner surface of the feed inlet 6. The lower surface of the feed inlet 6 is fixedly connected to the upper surface of the outer cover 12. The outer surface of the outer cover 12 is fixedly connected to the outer surface of the housing 1. The inner surface of the outer cover 12 is fixedly connected to the outer surface of the water inlet pipe 10. The outer surface of the collecting ring 8 is fixedly connected to the outer surface of the feed inlet 6. The outer surface of the side ring 14 is fixedly connected to the inner surface of the outer cover 12. The side ring 14 and the porous ring 13 are vertically linearly arranged along the inner surface of the outer cover 12.

[0050] During use, the bracket 4 fixes the entire device. The unfiltered sand and gravel enter the interior of the housing 1 from the feed inlet 6. The outer cover 12 is sleeved on the outer surface of the housing 1. The adjusting device 5 screens the incoming sand and gravel. During this process, since a large amount of dust is generated when the sand and gravel enter from the feed inlet 6, the water inlet pipe 10 injects fluid water into the area above the top of the sealing ring 11 inside the outer cover 12. The water is extruded by the acceleration ring 16. Due to the reduction of the flow cross-section, the water pressure and flow rate increase, and the water mist sprays out from the water spray holes 7. The obliquely upward water mist contacts the rising dust, and the dust combines with the water. The mass of the mixed water droplets increases and they fall downward into the interior of the collection ring 8. Since the collection ring 8 has an arc-shaped cross-section, the sewage flows along the return pipe 9 into the interior of the water inlet pipe 10, and then flows through the acceleration ring 16 for the second time. Through the continuous circulation of the water flow, the rising of the dust is reduced.

[0051] When the adjusting device 5 performs screening, due to the mutual impact and friction of the fragments, a relatively large noise will be generated. The noise of the gravel impact is transmitted outward to the housing 1 and then conducted to the interior of the porous ring 13 through fixation. Since a relatively large number of through holes are annularly provided in the wall of the porous ring 13 and the plate is designed with a porous rough edge to increase the movement trajectory of the sound and consume the energy of the sound wave. At the same time, the noise passes through the multilayer board 15, and the multilayer board 15 obliquely installed on the outer surface of the side ring 14 reflects and folds the sound wave. The noise on the side of the device is absorbed by each board. For the noise at the top of the device, a part of it needs to pass through the flowing water body, and through the flow of the water body, the propagation of the noise is reduced.

[0052] Embodiment 2:

[0053] Please refer to Figure 1 - Figure 8 Based on Embodiment 1, the present invention provides a technical solution: The adjusting device 5 includes a screening device 17. A retaining ring 18 is fixedly connected to the lower surface of the screening device 17. An inclined ring 19 is fixedly connected to the outer surface of the retaining ring 18. A fixed inclined plate 20 is provided at the bottom of the inclined ring 19. A rotating inclined plate 21 is provided at the bottom of the fixed inclined plate 20. A driving shaft 22 is fixedly connected to the inner surface of the rotating inclined plate 21. A cam 23 is fixedly connected to the outer surface of the driving shaft 22. A plug pin 24 is fixedly connected to the upper surface of the cam 23. A tension spring 25 is provided on the right side of the plug pin 24. The upper surface of the fixed inclined plate 20 is fixedly connected to the lower surface of the housing 1. The lower surfaces of the retaining ring 18 and the inclined ring 19 are slidably connected to the inner surface of the housing 1. The lower surface of the fixed inclined plate 20 is rotatably connected to the upper surface of the rotating inclined plate 21. The outer surface of the driving shaft 22 is rotatably connected to the inner surface of the housing 1. The inner surface of the housing 1 is slidably connected to the lower surface of the cam 23. The bottom end of the tension spring 25 is fixedly connected to the upper surface of the cam 23.

[0054] The screening device 17 includes a sealing plug 26. A connecting rod 27 is fixedly connected to the inner surface of the sealing plug 26. A sieve plate 28 is fixedly connected to the outer surface of the connecting rod 27. A compression spring 29 is fixedly connected to the lower surface of the sieve plate 28. The bottom end of the compression spring 29 is fixedly connected to a sieve cylinder 30. Leakage grooves 31 are formed in the wall of the sieve cylinder 30. The outer surface of the sealing plug 26 is slidably connected to the inner surface of the feed inlet 6. The connecting rod 27 is located inside the housing 1. The inner surface of the sieve cylinder 30 is slidably connected to the outer surface of the sieve plate 28. The lower surface of the sieve cylinder 30 is fixedly connected to the upper surface of the retaining ring 18. The inner surface of the sieve cylinder 30 is slidably connected to the outer surface of the bolt 24. The top end of the tension spring 25 is rotatably connected to the lower surface of the sieve cylinder 30. The bottom end of the connecting rod 27 is slidably connected to the inner surface of the sieve cylinder 30.

[0055] During use, the drive shaft 22 drives the cam 23 to rotate. The bolt 24 at the top of the cam 23 is inserted into the inside of the sieve cylinder 30 in the screening device 17. Due to the presence of the cam 23, the sieve cylinder 30 rotates eccentrically. The sieve cylinder 30 performs horizontal screening. Since the slopes of the fixed inclined plate 20 and the rotating inclined plate 21 are the same, during the rotation of the drive shaft 22, the fixed inclined plate 20 and the rotating inclined plate 21 are displaced from each other and move away from each other. The tension spring 25 assists in resetting, so that while the sieve cylinder 30 rotates horizontally and eccentrically, it also shakes up and down by a certain amplitude. On the basis of traditional horizontal screening, vertical screening is added. By increasing the movement form of the device, the sand screening effect is increased. The large pieces of sand and stones are discharged from the outside of the device along the outer surface of the inclined ring 19 from the coarse material outlet 2. The fine sand, under the restriction of the retaining ring 18, falls from the through groove at the bottom of the housing 1, and the device completes the screening.

[0056] When the sieve cylinder 30 shakes, the sand and stones roll downward along the upper surface of the sieve plate 28. The large pieces of sand and stones are discharged from the leakage grooves 31 to the outside of the sieve cylinder 30. When the sand and stones fall onto the upper surface of the sieve plate 28, the self-weight of the sieve plate 28 increases, and the sieve plate 28 drives the connecting rod 27 to move downward. The outer surface of the sealing plug 26 blocks the inner surface of the feed inlet 6, and the compression spring 29 is squeezed and contracted. As the sand screening continues, the sand and stones on the top of the sieve plate 28 decrease, the self-weight decreases, the compression spring 29 elongates, and the release of the elastic potential energy pushes the entire connecting rod 27 to move upward, and the sealing plug 26 is separated from the feed inlet 6, and the device feeds materials. This process is repeated, and the purpose of controlling the material is achieved through intermittent feeding.

[0057] Working principle:

[0058] In the present invention, by providing a housing 1, when the device is in use, the bracket 4 fixes the entire device, and the un-screened sand and gravel enter the interior of the housing 1 from the feed inlet 6. The outer cover 12 is sleeved on the outer surface of the housing 1, and the regulating device 5 screens the incoming sand and gravel. During this process, since a large amount of dust is generated when the sand and gravel enter from the feed inlet 6, the water inlet pipe 10 injects fluid water into the area above the sealing ring 11 inside the outer cover 12. The water is extruded by the acceleration ring 16. Due to the reduction of the flow cross-section, the water pressure and flow rate increase, and the water mist sprays out from the spray holes 7. The obliquely upward water mist contacts the rising dust, and the dust merges with the water. The mass of the mixed water droplets increases and they fall downward into the interior of the collection ring 8. Since the collection ring 8 has an arc-shaped cross-section, the sewage flows along the return pipe 9 into the interior of the water inlet pipe 10, and then flows through the acceleration ring 16 for the second time. Through the continuous circulation of the water flow, the upward movement of the dust is reduced, solving the problem that a large amount of dust is generated when traditional sand screening equipment is working.

[0059] When the regulating device 5 performs screening, due to the mutual impact and friction of the fragments, a relatively large noise will be generated. The noise of the gravel impact is transmitted outward to the housing 1 and then conducted to the interior of the porous ring 13 through fixation. Since a relatively large number of through holes are annularly formed in the wall of the porous ring 13 and the plate is designed with porous rough edges, the movement trajectory of the sound is increased to consume the energy of the sound wave. At the same time, the noise passes through the multi-layer board 15, and the multi-layer board 15 obliquely installed on the outer surface of the side ring 14 reflects and folds the sound wave. The noise on the side of the device is absorbed by each board. For the noise at the top of the device, a part of it needs to pass through the flowing water body. Through the flow of the water body, the propagation of the noise is reduced, solving the problem that a relatively large noise is generated when traditional sand screening equipment is working.

[0060] The drive shaft 22 drives the cam 23 to rotate. The pin 24 at the top of the cam 23 is inserted into the interior of the sieve drum 30 in the screening device 17. Due to the presence of the cam 23, the sieve drum 30 rotates eccentrically, and the sieve drum 30 performs horizontal screening. Since the slopes of the fixed inclined plate 20 and the rotating inclined plate 21 are the same, during the rotation of the drive shaft 22, the fixed inclined plate 20 and the rotating inclined plate 21 are displaced from each other and move away from each other. The tension spring 25 assists in resetting, so that while the sieve drum 30 rotates horizontally and eccentrically, it also shakes up and down by a certain amplitude. On the basis of traditional horizontal screening, vertical screening is added. By increasing the movement form of the device, the sand screening effect is increased. The large pieces of sand and gravel are screened out and fall outside the device from the outer surface of the inclined ring 19 through the coarse material outlet 2. The fine sand falls from the through groove at the bottom of the housing 1 under the restriction of the retaining ring 18, and the device completes the screening, solving the problem that the movement form of traditional horizontal sand screening machines is single and the screening efficiency is poor.

[0061] The sieve cylinder 30 shakes, and the sand and stones roll down along the upper surface of the leakage plate 28. The large pieces of sand and stones are discharged from the leakage groove 31 to the outside of the sieve cylinder 30. When the sand and stones fall onto the upper surface of the leakage plate 28, the self-weight of the leakage plate 28 increases, and the leakage plate 28 drives the connecting rod 27 to move downward. The outer surface of the sealing plug 26 blocks the inner surface of the feed inlet 6, and the compression spring 29 is squeezed and contracted. As the sand screening continues, the sand and stones at the top of the leakage plate 28 decrease, and the self-weight decreases. The compression spring 29 extends, and the release of the elastic potential energy pushes the connecting rod 27 to move upward as a whole. The sealing plug 26 is separated from the feed inlet 6, and the equipment feeds materials. This process is repeated, and the purpose of controlling the material is achieved through intermittent feeding, solving the problems of easy floating of internal dust and uncontrollable feeding amount in the traditional through-type sand screening machine.

[0062] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dust - reducing and noise - reducing sand screening device, characterized in that: It includes a housing (1), a cover (12), a feed inlet (6), a bracket (4), an adjusting device (5), a screening device (17) located inside the housing, a dust reduction device, a noise reduction device, and a motor (32) that provides power; A coarse material port (2) is opened in the outer wall of the housing (1). The top of the housing (1) is fixedly connected with a cover (12). A funnel-shaped feed inlet (6) is provided at the top of the cover (12). The bottom of the housing (1) is fixedly connected with a plurality of brackets (4). The bottom of the housing (1) is movably sleeved with an adjusting device (5); The adjusting device (5) is arranged inside the screening device (17) and includes a fixed inclined plate (20) provided at the bottom of an inclined ring (19). A rotating inclined plate (21) is arranged at the bottom of the fixed inclined plate (20). A driving shaft (22) is fixedly connected to the inner surface of the rotating inclined plate (21). The driving shaft (22) is connected to a motor (32) below. A cam (23) is fixedly connected to the outer surface of the driving shaft (22). A pin (24) is provided on the upper surface of the cam (23). A tension spring (25) is arranged on the right side of the pin (24); The dust reduction device includes a water spray hole (7), a sealing ring (11), a water channel (3), and a water inlet pipe (10). The water spray hole (7) and the water channel connected to the water spray hole (7) are arranged in the wall of the feed inlet (6); The water inlet pipe (10) is a bent conduit. The bottom end of the water inlet pipe (10) is inserted into the inner wall of the cover (12) and is connected to the water channel (3) below the water spray hole (7); A sealing ring (11) is provided at the bottom of the water inlet pipe (10); The noise reduction device includes a porous ring (13), a side ring (14), and a multi-layer board (15). The porous ring (13) is fixedly connected to the inner surface of the cover (12). The side ring (14) is provided at the top of the porous ring (13). The multi-layer board (15) is fixedly connected to the outer surface of the side ring (14). The side ring (14) and the porous ring (13) are vertically linearly arranged along the inner surface of the cover (12).

2. The dust - reducing and noise - reducing sand screening device according to claim 1, characterized in that: A collecting ring (8) is provided on the outer surface of the feed inlet (6). Two holes are opened in the recess of the collecting ring (8). A return pipe (9) is provided below the holes. The collecting ring (8) is communicated with the return pipe (9) through the openings. The bottom end of the return pipe (9) is fixedly connected to and communicated with the water inlet pipe (10); 3. The dust - reducing and noise - reducing sand screening device according to claim 2, characterized in that: An acceleration ring (16) is provided circumferentially in the wall of the feed inlet (6). The acceleration ring (16) is located below the water spray hole (7). The cross-section of the acceleration ring (16) for water flow is smaller than that of the water spray hole. The acceleration ring (16) with different cross-section sizes can be selected according to the water flow rate required at the outlet.

4. The dust - reducing and noise - reducing sand screening device according to claim 1, characterized in that: The screening device (17) includes a sealing plug (26), a connecting rod (27), a sieve plate (28), a compression spring (29), a sieve cylinder (30) and a leakage groove (31). The sealing plug (26) is located above the feed inlet (6); a connecting rod (27) is fixedly connected to the inner surface of the sealing plug (26), a sieve plate (28) is fixedly connected to the outer surface of the connecting rod (27), a compression spring (29) is fixedly connected to the lower surface of the sieve plate (28), the compression spring (29) is arranged at the bottom of the connecting rod (27), the bottom end of the compression spring (29) is fixedly connected to the center of the bottom of the sieve cylinder (30), and a plurality of leakage grooves (31) are formed in the wall of the sieve cylinder (30).

5. The dust - reducing and noise - reducing sand screening device according to claim 4, characterized in that: The screening device (17) further includes a retaining ring (18) and an inclined ring (19). The retaining ring (18) is arranged on the lower surface of the sieve cylinder (30), and an inclined ring (19) with a certain inclination angle for the sand and stones to slide out is fixedly connected to the outer surface of the retaining ring (18).

6. The dust - reducing and noise - reducing sand screening device according to claim 4, characterized in that: The sealing plug (26) is cylindrical, and the end face is larger than the lower opening of the feed inlet (6), and it can move with the connecting rod (27) to fit or separate from the inner surface of the feed inlet (6); the sieve plate (28) is an inclined upward triangular plate, a plurality of openings are provided on the sieve plate (28), and the inner surface of the sieve cylinder (30) and the outer surface of the sieve plate (28) can move relative to each other.

7. The dust - reducing and noise - reducing sand screening device according to claim 5, characterized in that: The upper surface of the fixed inclined plate (20) is fixedly connected to the lower surface of the housing (1), the lower surfaces of the retaining ring (18) and the inclined ring (19) are slidably connected to the inner surface of the housing (1), the lower surface of the fixed inclined plate (20) is rotatably connected to the upper surface of the rotating inclined plate (21), the outer surface of the drive shaft (22) is rotatably connected to the inner surface of the housing (1), the inner surface of the housing (1) is slidably connected to the lower surface of the cam (23), and the bottom end of the tension spring (25) is fixedly connected to the upper surface of the cam (23).

8. The dust - reducing and noise - reducing sand screening device according to claim 4, characterized in that: The inner surface of the sieve cylinder (30) is slidably connected to the outer surface of the bolt (24), the top end of the tension spring (25) is rotatably connected to the lower surface of the sieve cylinder (30), and the bottom end of the connecting rod (27) is slidably connected to the inner surface of the sieve cylinder (30).

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