Conical fine sand recovery device

Abstract

The present invention discloses a conical fine sand recovery device, including an air inlet pipe, an air outlet pipe, an upper air cover, a lower air cover, a distributor, an upper guide shaft arranged at the upper end of the distributor, a lower guide shaft arranged at the lower end of the distributor, a collection bin with a discharger arranged at the bottom, a retaining ring arranged at the top of the collection bin, a guide shaft lifting device, an adjustment ring lifting device, an upper guide sleeve, and a lower guide sleeve. A lower air cover is arranged at the top of the air inlet pipe, an upper air cover is arranged at the bottom of the air outlet pipe, a gap is arranged between the upper air cover and the lower air cover, a distributor is arranged in the cavity formed by the upper air cover and the lower air cover, a guide shaft lifting device is arranged on the air outlet pipe, an adjustment ring lifting device is installed on the top of the collection bin, an upper guide shaft is sleeved in the upper guide sleeve, and a lower guide shaft is sleeved in the lower guide sleeve. The advantages of the present invention are as follows: fine sand and micro powder of different particle sizes can be screened by adjusting the upper and lower positions of the distributor and the adjustment ring, thereby improving the sand and gravel recovery efficiency of the system, and the structure is simple and the cost is low.

Description

Technical Field

[0001] The invention relates to a sand and gravel recovery device for a VU sand making system, in particular to a conical fine sand recovery device. Background Art

[0002] As an important structural material component of infrastructure, sand and gravel are the main raw materials for basic products in the construction industry, such as concrete and cement components. Sand and gravel can be divided into two categories: natural sand directly mined and artificial sand, of which artificial sand accounts for about 68%. At present, natural sand resources are close to exhaustion, and the development of artificial sand has become the mainstream trend.

[0003] The existing machine-made sand industry has many problems such as low product quality, high pollution in the production process, and low resource utilization. The development model is too extensive and does not conform to the theme of green environmental protection. The VU sand making system came into being. The system adopts a closed dust removal design, which can control the fine powder below 0.075mm that is harmful to the grading of machine-made sand within a reasonable range. However, this process will also exclude some useful particles larger than 0.075mm, affecting the rationality of the grading. Therefore, the sand making system is usually equipped with a machine-made sand recovery device installed before the dust collector.

[0004] Due to the limitations of the structure, spatial location and energy consumption reduction of the VU sand making system, the existing machine-made sand recovery devices generally use single-baffle inertial dust collectors, which are equipped with only one baffle. Since the particle size of the recovered sand includes both fine sand in the range of 0.075-0.30 mm and a large amount of coarse sand in the range of 0.60-1.16 mm, it is difficult to effectively adjust the inertial dust collector, which reduces the recovery efficiency. The recovery rate of useful sand in the 0.075-1.16 mm section can usually only be controlled within 70%, and this part of sand is very critical to improving the concrete grading. If a multi-baffle inertial dust collector is used, the volume will increase significantly, making it difficult to arrange and install, and it will increase resistance, increase system power, and increase energy consumption. How to improve the recovery efficiency of useful sand under existing conditions is the focus of industry research. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a conical fine sand recoverer with small volume and high fine sand recovery efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: comprising an air inlet pipe and an air outlet pipe, a lower air cover is arranged on the top of the air inlet pipe, the lower air cover is an inverted conical plate, the lower port of the lower air cover is connected to the air inlet pipe, the lower port of the lower air cover is fixedly connected to the air inlet pipe, an upper air cover is arranged on the bottom of the air outlet pipe, the upper air cover is a conical plate, the upper port of the upper air cover is connected to the air outlet pipe, the upper port of the upper air cover is fixedly connected to the air outlet pipe, the lower port of the upper air cover is arranged opposite to the upper port of the lower air cover and is There is a gap, a distributor is arranged in the cavity surrounded by the upper wind hood and the lower wind hood, the distributor is a double cone structure composed of upper and lower cone bottom surfaces, the distributor is located between the upper wind hood and the lower wind hood, a gap is arranged between the distributor and the upper wind hood and the lower wind hood, an upper guide shaft is arranged on the top of the distributor, a lower guide shaft is arranged on the bottom of the distributor, an upper guide sleeve is mounted on the upper guide shaft, a lower guide sleeve is mounted on the lower guide shaft, and the upper guide shaft can be mounted in the upper guide sleeve The cam is connected with the air inlet pipe by the upper and lower guide sleeves, and the lower guide sleeve is connected with the inner wall of the air outlet pipe by the upper and lower guide sleeves. The air outlet pipe is provided with a rectangular opening. The top of the upper guide shaft is provided with a connecting rod, and the connecting rod passes through the opening. One end of the connecting rod is fixedly connected with the upper guide shaft, and the other end of the connecting rod is connected with a guide shaft lifting device. The guide shaft lifting device drives the upper guide shaft to move up and down. A collecting bin is provided on the outside of the upper wind cover and the lower wind cover. The upper part of the collecting bin is fixedly connected with the outer edge of the lower port of the upper wind cover, and the lower part of the collecting bin is fixedly connected with the air inlet pipe. The collecting bin is connected with the upper wind cover and the air inlet pipe to form a closed cavity structure. A retaining ring is provided on the top of the collecting bin, and the retaining ring is fixedly connected to the inner surface of the upper top of the collecting bin. An adjusting ring lifting device is provided on the top of the collecting bin, and the adjusting ring lifting device is located at the top of the collecting bin. A discharger is provided at the bottom of the collecting bin.

[0007] Preferably, the guide shaft lifting device includes a fixing plate with a circular hole, a screw and a sleeve, the fixing plate is horizontally fixedly connected to the side wall of the air outlet duct, one end of the screw is fixedly connected to the fixing plate by a bolt, the other end of the screw is fixedly connected to the outer circumferential surface of the sleeve, and the connecting rod passes through the sleeve.

[0008] Preferably, the adjustment ring lifting device includes an adjustment ring and a lifting rod, the adjustment ring is located on the inner side of the retaining ring, the upper surface of the adjustment ring is fixedly connected to the lifting rod, and the lifting rod is bolted to the top inner surface of the collection bin.

[0009] Preferably, the lower vertex angle of the distributor ranges from 90° to 120°, and the lateral angle ranges from 70° to 120°.

[0010] Preferably, the lower vertex angle of the distributor is 90°.

[0011] Preferably, an outer edge curved outwards is provided at the top opening of the lower wind shield.

[0012] The present invention has the following advantages: fine sand and micro powder of different particle sizes can be screened by adjusting the upper and lower positions of the divider and the adjusting ring; the overall structure has a small volume and a small working resistance; it can be directly installed on the vertical pipeline of the VU sand making system and can be used in series in the VU sand making system according to actual conditions, thereby improving the sand and gravel recovery efficiency of the system; the structure is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a conical fine sand recovery device of the present invention.

[0014] Figure 2 The figure is a schematic diagram of the principle of a conical fine sand recovery device of the present invention.

[0015] Figure 3 This is a partial enlarged view of a conical fine sand recoverer of the present invention.

[0016] Numbers in the figure: In the figure: 1. Air inlet pipe; 2. Collecting bin; 3. Lower wind hood; 4. Distributor; 5. Upper wind hood; 6. Upper guide shaft; 7. Air outlet pipe; 8. Guide shaft lifting device; 9. Adjustment ring lifting device; 10. Upper guide sleeve; 11. Lower guide sleeve; 12. Discharger; 13. Connecting rod; 14. Lower guide shaft; 15. Blocking ring; 16. Sleeve; 17. Fixing plate; 18. Screw; 19. Opening; 20. Lifting rod; 21. Adjustment ring. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention.

[0018] Implementation example Figure 1 , Figure 2 , Figure 3As shown, a lower wind hood 3 is installed on the top of the air inlet pipe 1, and the lower wind hood 3 is an inverted cone plate. An outer edge bent outward is arranged at the top opening of the lower wind hood 3. The lower port of the lower wind hood 3 is connected to the air inlet pipe 1, and the lower port of the lower wind hood 3 is welded to the air inlet pipe 1. An upper wind hood 5 is installed at the bottom of the air outlet pipe 7. The upper wind hood 5 is a cone plate. The upper port of the upper wind hood 5 is connected to the air outlet pipe 7, and the upper port of the upper wind hood 5 is welded to the air outlet pipe 7. The lower port of the upper wind hood 5 is arranged opposite to the upper port of the lower wind hood 3 and a gap is arranged therebetween. A distributor 4 is installed in the cavity surrounded by the upper wind hood 5 and the lower wind hood 3. The distributor 4 is a double cone structure composed of two upper and lower cone bottom surfaces of the same size. The angle range of the lower vertex angle of the distributor 4 is 90°~120°, the lateral angle range is 70~120°, the lower vertex angle of the distributor 4 is preferably 90°, the distributor 4 is located between the upper wind hood 5 and the lower wind hood 3, and a gap is set between the distributor 4 and the upper wind hood 5 and the lower wind hood 3. The top of the distributor 4 is welded with a guide shaft 6, and the bottom of the distributor 4 is welded with a lower guide shaft 14. The upper guide shaft 6 is sleeved with an upper guide sleeve 10, and the lower guide shaft 14 is sleeved with a lower guide sleeve 11. The upper guide shaft 6 can slide up and down in the upper guide sleeve 10, and the lower guide shaft 14 can slide up and down in the lower guide sleeve 11. The upper guide sleeve 10 is welded to the inner wall of the air outlet pipe 7 through a crossbeam, and the lower guide sleeve 11 is welded to the inner wall of the air inlet pipe 1 through a crossbeam. A rectangular opening 19 is provided on the air outlet 7, a connecting rod 13 is installed on the top of the upper guide shaft 6, the connecting rod 13 passes through the opening 19, one end of the connecting rod 13 is welded to the top of the upper guide shaft 6, the other end of the connecting rod 13 is connected to a guide shaft lifting device 8, the guide shaft lifting device 8 drives the upper guide shaft 6 to move up and down, the guide shaft lifting device 8 includes a fixing plate 17 with a circular hole, a screw 18, and a sleeve 16, the fixing plate 17 is horizontally welded to the side wall of the air outlet 7, one end of the screw 18 is bolt-welded to the fixing plate 17, the other end of the screw 18 is welded to the outer circumferential surface of the sleeve 16, the connecting rod 13 passes through the sleeve 16, and the upper wind cover 5 and the lower wind cover 3 are externally installed to collect Bin 2, the upper part of the collecting bin 2 is welded to the outer edge of the lower port of the upper wind hood 5, the lower part of the collecting bin 2 is welded to the surface of the air inlet pipe 1, the collecting bin 2 is connected with the upper wind hood 5 and the air inlet pipe 1 to form a closed cavity structure, a baffle ring 15 is installed on the top of the collecting bin 2, and the baffle ring 15 is welded to the inner surface of the upper top of the collecting bin 2, an adjusting ring lifting device 9 is installed on the top of the collecting bin 2, the adjusting ring lifting device 9 is located at the top of the collecting bin 2, the adjusting ring lifting device 9 includes an adjusting ring 21 and a lifting rod 20, the adjusting ring 21 is located on the inner side of the baffle ring 15, the lifting rod 20 is welded on the upper surface of the adjusting ring 21, the lifting rod 20 is bolted to the inner surface of the top of the collecting bin 2, and a discharger 12 is installed at the bottom of the collecting bin 2.

[0019] The working principle of the present invention is as follows: the present invention is directly installed on the vertical pipeline of the VU sand making system. When the sand-containing airflow enters the lower wind hood from the air inlet pipe, it is divided by the distributor, and the airflow enters the annular pipeline formed by the distributor and the lower wind hood, and then passes through the annular pipeline formed by the distributor and the upper wind hood, and is finally discharged through the air outlet pipe. When the sand-containing airflow passes through the corner of the distributor, the airflow changes direction, and the fine sand with larger particle size in the airflow is affected by the centrifugal force and thrown toward the side wall of the collecting bin along the tangent direction of the airflow, and falls into the collecting bin after being collected by the adjusting ring, and is finally discharged through the unloader. The micro powder that is less affected by the centrifugal force is driven by the airflow to be discharged through the air outlet pipe, thereby realizing the function of recovering fine sand.

[0020] The double-cone distributor can achieve the best working state when the working top angle is 90°, that is, the best sand and gravel separation effect.

[0021] An outwardly curved outer edge is arranged at the opening of the large end of the lower conical wind hood, which can reduce the resistance of sand and gravel with larger particle sizes entering the collection bin and improve the recovery efficiency of fine sand.

[0022] The function of the upper and lower adjustment of the distributor is to adjust the gap between the distributor and the lower wind hood through the guide shaft when the wind speed of the air inlet pipe is constant, change the wind speed in the gap, and at the same time change the centrifugal force exerted on the material in the sand-containing airflow, so as to adjust the screening and recovery of fine sand of different particle size ranges.

[0023] The adjusting ring is arranged at the top of the collecting bin near the position where the airflow changes direction. Its function is to collect the separated fine sand and prevent it from re-entering the working airflow due to rebound, thereby improving the collection efficiency of the fine sand recoverer. At the same time, the fine sand of different particle size ranges can be screened and selected by moving the adjusting ring up and down. The upward movement of the adjusting ring can increase the particle size range of the material entering the aggregate bin, and the downward movement can reduce the amount of material with smaller particle size entering the aggregate bin. The adjustment of the adjusting ring is used in conjunction with the position adjustment of the distributor to give full play to the role of the adjusting ring and improve the efficiency of screening and collecting sand and gravel.

[0024] The basic principles, main features and advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A conical fine sand recovery device, characterized in that: The invention comprises an air inlet pipe (1) and an air outlet pipe (7), wherein a lower air cover (3) is arranged at the top of the air inlet pipe (1), the lower air cover (3) is an inverted conical plate, the lower port of the lower air cover (3) is connected to the air inlet pipe (1), the lower port of the lower air cover (3) is fixedly connected to the air inlet pipe (1), and an upper air cover (5) is arranged at the bottom of the air outlet pipe (7), the upper air cover (5) is a conical plate, the upper port of the upper air cover (5) is connected to the air outlet pipe (7), the upper port of the upper air cover (5) is fixedly connected to the air outlet pipe (7), the lower port of the upper air cover (5) is arranged opposite to the upper port of the lower air cover (3) and a gap is provided therebetween, and the upper air cover (5) and the lower air cover (3) are spaced apart from each other. A distributor (4) is arranged in the enclosed cavity. The distributor (4) is a double cone structure formed by splicing the bottom surfaces of two upper and lower cones. The distributor (4) is located between the upper wind cover (5) and the lower wind cover (3). A gap is arranged between the distributor (4) and the upper wind cover (5) and the lower wind cover (3). An upper guide shaft (6) is arranged at the top of the distributor (4). A lower guide shaft (14) is arranged at the bottom of the distributor (4). An upper guide sleeve (10) is mounted on the upper guide shaft (6). A lower guide sleeve (11) is mounted on the lower guide shaft (14). The upper guide shaft (6) can slide up and down in the upper guide sleeve (10). The lower guide shaft (14) The lower guide sleeve (11) can slide up and down in the lower guide sleeve (11); the upper guide sleeve (10) is fixedly connected to the inner wall of the air outlet pipe (7) through a cross beam; the lower guide sleeve (11) is fixedly connected to the inner wall of the air inlet pipe (1) through a cross beam; a rectangular opening (19) is provided on the air outlet pipe (7); a connecting rod (13) is provided on the top of the upper guide shaft (6); the connecting rod (13) passes through the opening (19); one end of the connecting rod (13) is fixedly connected to the upper guide shaft (6); the other end of the connecting rod (13) is connected to a guide shaft lifting device (8); the guide shaft lifting device (8) drives the upper guide shaft (6) to move up and down; the upper wind cover (5) and A collecting bin (2) is arranged outside the lower wind hood (3); the upper part of the collecting bin (2) is fixedly connected to the outer edge of the lower port of the upper wind hood (5); the lower part of the collecting bin (2) is fixedly connected to the air inlet pipe (1); the collecting bin (2), the upper wind hood (5) and the air inlet pipe (1) are connected to form a closed cavity structure; a retaining ring (15) is arranged on the top of the collecting bin (2); the retaining ring (15) is fixedly connected to the inner surface of the upper top of the collecting bin (2); an adjusting ring lifting device (9) is arranged on the top of the collecting bin (2); the adjusting ring lifting device (9) is located at the top of the collecting bin (2); a discharger (12) is arranged on the bottom of the collecting bin (2); The adjusting ring lifting device (9) comprises an adjusting ring (21) and a lifting rod (20); the adjusting ring (21) is located on the inner side of the retaining ring (15); the upper surface of the adjusting ring (21) is fixedly connected to the lifting rod (20); and the lifting rod (20) is bolted to the inner surface of the top of the collecting bin (2).

2. A conical fine sand recovery device according to claim 1, characterized in that: The guide shaft lifting device (8) comprises a fixing plate (17) provided with a circular hole, a screw rod (18), and a sleeve (16); the fixing plate (17) is horizontally fixedly connected to the side wall of the air outlet pipe (7); one end of the screw rod (18) is bolt-fixedly connected to the fixing plate (17); the other end of the screw rod (18) is fixedly connected to the outer circumferential surface of the sleeve (16); and the connecting rod (13) passes through the sleeve (16).

3. A conical fine sand recovery device according to claim 1, characterized in that: The lower vertex angle of the distributor (4) is in the range of 90° to 120°, and the lateral angle is in the range of 70° to 120°.

4. A conical fine sand recovery device according to claim 3, characterized in that: The lower vertex angle of the distributor (4) is 90°.

5. The conical fine sand recovery device according to claim 1, characterized in that: The top opening of the lower wind shield (3) is provided with an outer edge that bends outwards.

Images