A sand and gravel screening device for UHPC concrete production

Abstract

The present invention discloses a sand and gravel screening device for UHPC concrete production, which relates to the technical field of UHPC concrete production. The device comprises a first support frame, a filter barrel, a mounting frame, and a second conveyor. The top of the first support frame is rotatably mounted with a right mounting ring, the outer side of which is provided with a drive assembly. The left side of the right mounting ring is fixed with a filter barrel via screws, and the left end of the filter barrel is fixed with a left mounting ring via screws. The left mounting ring is rotatably mounted on a third support frame. The inner wall of the left mounting ring is fixed with a connecting frame, and the left side of the left mounting ring is rotatably connected to a grinding barrel. The sand and gravel screening device for UHPC concrete production grinds the screened sand and gravel according to different particle sizes during grinding to improve the grinding effect. Sand and gravel within different particle size ranges are installed with grinding plates at different positions, which can screen out finer sand and gravel.

Description

Technical Field

[0001] The invention relates to the technical field of UHPC concrete production, in particular to a sand and gravel screening device for UHPC concrete production. Background Art

[0002] UHPC concrete refers to ultra-high-performance concrete with a compressive strength of up to 810 MPa. It has high thermal insulation and waterproof properties and a fine texture. When making UHPC concrete, small-sized, uniform quartz sand or fine crushed stone is generally selected, with a particle size range of 0.15-0.6 mm. Before making UHPC concrete, the sand and gravel need to be screened to select sand and gravel of qualified size.

[0003] Chinese invention patent publication number CN117282660B discloses a raw material screening device for UHPC concrete production, comprising a housing, a transmission device fixedly connected to the output shaft of a motor, a grinding device fixedly connected to the inner wall of a third fixed rod, and a screening device fixedly connected to the outer wall of a sixth fixed rod. This UHPC concrete production raw material screening device uses a motor to drive the transmission device, so that the raw material on the screening plate has a certain inertia and is always in a state of motion. It collides with the screen, resulting in a good screening effect, preventing the accumulation of large-sized raw materials. The grinding device grinds and compacts the large-sized raw materials to improve production efficiency.

[0004] For example, the Chinese invention patent with authorization announcement number CN119216207B discloses a sand and gravel screening device for concrete production, comprising a frame, the frame having a supporting surface inclined in the front-rear direction, a screening drum being provided on the supporting surface, the screening drum comprising a front feed drum and a rear discharge drum, the feed drum and the discharge drum being fixedly arranged on the supporting surface, a plurality of movable screen drums being provided between the feed drum and the discharge drum, the plurality of movable screen drums having the same diameter and being sequentially connected from front to back; an annular screen is rotatably provided on the outer circumference of each movable screen drum, and the mesh openings of the plurality of annular screens gradually increase from front to back; each movable screen drum is capable of sliding in a direction perpendicular to the supporting surface, and each movable screen drum is provided with a driving mechanism, the driving mechanism being capable of driving the annular screen to rotate, and the rotation directions of two adjacent annular screens are opposite, thereby improving the screening effect;

[0005] In combination with the existing scheme and the actual production and processing, the existing sand and gravel screening device for UHPC concrete production, in order to make full use of sand and gravel, sets a grinding structure in the screening device, and all large-particle sand and gravel are ground together. The grinding intensity is relatively high. During the grinding process, due to friction and re-grinding of the grinding structure, the particle size of most sand and gravel will be smaller than the required particle size standard, resulting in these sand and gravel being unable to be used, resulting in waste. Therefore, we propose a sand and gravel screening device for UHPC concrete production to solve the above-mentioned problems. Summary of the Invention

[0006] The object of the present invention is to provide a sand and gravel screening device for UHPC concrete production to solve the problem of the existing sand and gravel screening device for UHPC concrete production proposed in the above background technology. In order to make full use of sand and gravel, a grinding structure is set in the screening device, and all large-particle sand and gravel are ground together. During the grinding process, due to friction and re-grinding of the grinding structure, the particle size of most sand and gravel will be smaller than the required particle size standard, resulting in these sand and gravel being unable to be used, causing waste.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a sand and gravel screening device for UHPC concrete production, comprising a first support frame, a filter barrel, a mounting frame and a second conveyor:

[0008] The top end of the first support frame is rotatably mounted with a right mounting ring, the outer side of the right mounting ring is provided with a driving assembly, the left side of the right mounting ring is fixed with a filter barrel by a screw, the left end of the filter barrel is fixed with a left mounting ring by a screw, the left mounting ring is rotatably mounted on the third support frame, the inner wall of the left mounting ring is fixed with a connecting frame, and the outer side of the connecting frame is fixed with a grinding plate, the left side of the left mounting ring is rotatably connected to the grinding barrel, and the inner wall of the grinding barrel is fixed with a filter plate, the bottom end of the grinding barrel is fixed with a filter ring, and the inner wall of the filter ring is glued and connected with a bump, and the left and right ends of the grinding barrel are fixed with a second supporting frame;

[0009] A first conveyor is installed on the top of the mounting frame, a fine material filter belt is glued and connected to the inner side of the first conveyor, a vibration component for vibrating the material is provided on the inner side of the fine material filter belt, a second conveyor is provided below the fine material filter belt, and a material guide plate fixed to the first support frame is provided on the inner side of the right mounting ring.

[0010] By adopting the above technical solution, the screened sand and gravel are ground in different zones according to different particle sizes during grinding to improve the grinding effect. Sand and gravel within different particle size ranges are installed on grinding plates at different positions to screen out finer sand and gravel.

[0011] Preferably, the driving assembly includes a first motor, a first pulley, a first transmission belt, a gear and a gear ring. The first motor is fixed on a first support frame. The output end of the first motor is fixed with a first pulley. The outer side of the first pulley is provided with a first transmission belt, and a gear is fixed on the left side of the first pulley at the top of the first transmission belt. The gear is rotatably installed on the first support frame, and the top of the gear is meshed with a gear ring.

[0012] Preferably, a right mounting ring is fixed to the inner side surface of the gear ring.

[0013] Preferably, three groups of filter plates are fixed inside the grinding barrel, and the filter hole diameters of the three groups of filter plates gradually increase from left to right.

[0014] Preferably, the vibration assembly includes a second motor, a second pulley, a second transmission belt and a curved plate. The second motor is fixed to the rear side of the second support frame. The output end of the second motor is fixed with a second pulley, and the outer side of the second pulley is provided with a second transmission belt. The front side of the second pulley is fixed with a curved plate.

[0015] Preferably, the front ends of the second support frame and the third support frame at the left end of the grinding barrel are both rotatably mounted with the front ends of the arc-shaped plates.

[0016] Preferably, the arc-shaped plate is located on the inner side of the fine material filter belt.

[0017] Preferably, the filter plate and the filter ring are arranged perpendicular to each other.

[0018] Preferably, the filter barrel, grinding barrel, fine material filter belt and second conveyor are all arranged lower on the left and higher on the right.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the sand and gravel screening device for UHPC concrete production grinds the screened sand and gravel according to different particle sizes during grinding, thereby improving the grinding effect. Sand and gravel within different particle size ranges are installed with grinding plates at different positions, thereby being able to screen out finer sand and gravel.

[0020] 1. A connecting frame is fixed to the inner wall of the left mounting ring, and a grinding plate is fixed to the outside of the connecting frame. The grinding plate is located above the filter plate. When the filter barrel rotates to screen the sand and gravel, the connecting frame and the grinding plate rotate. The rotation of the connecting frame and the grinding plate grinds the sand and gravel with larger particle sizes, so that the sand and gravel particle sizes meet the standard. Three groups of filter plates are fixed inside the grinding barrel, and the filter hole apertures of the three groups of filter plates gradually increase from left to right. The sand and gravel with unqualified particle sizes are screened into three groups using the three groups of filter plates. When grinding, the screened sand and gravel are ground according to different particle sizes to improve the grinding effect and avoid the sand and gravel with smaller particle sizes being ground into sand and gravel with smaller particle sizes than required;

[0021] When the filter barrel rotates to screen sand and gravel, it drives the connecting frame and grinding plate to rotate. Therefore, the driving component can not only drive the filter barrel to rotate to improve screening efficiency, but also drive the connecting frame and grinding plate to rotate to grind sand and gravel, thereby improving sand and gravel utilization rate;

[0022] The sand and gravel can be filtered again by using three sets of filter plates and filter rings, so that the sand and gravel are fully filtered, and the sand and gravel with qualified particle size can be prevented from flowing into the sand and gravel with unqualified particle size when the sand and gravel flows downward along the slope;

[0023] 2. Filter the sand and gravel through the filter barrel. The sand and gravel with qualified particle size and the sand and gravel with particle size smaller than the qualified range will pass through the filter barrel and be further filtered through the fine material filter belt to filter out finer sand and gravel. Vibrate the fine material filter belt through the vibration component to improve the screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the first axis side structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the first axial side cross-section structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the connection structure between the connecting frame and the left mounting ring of the present invention;

[0027] Figure 4 This is a schematic structural diagram of the vibration component of the present invention;

[0028] Figure 5 This is a schematic diagram of the connection structure between the projection and the filter ring of the present invention;

[0029] Figure 6 This is a schematic diagram of the second-axis structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the grinding barrel structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the drive assembly of the present invention;

[0032] Figure 9 This is a schematic diagram of the second axial side cross-section structure of the present invention.

[0033] In the figure: 1. First support frame; 2. Right mounting ring; 3. Drive assembly; 301. First motor; 302. First pulley; 303. First conveyor belt; 304. Gear; 305. Gear ring; 4. Filter barrel; 5. Left mounting ring; 6. Connecting frame; 7. Grinding plate; 8. Grinding barrel; 9. Filter plate; 10. Second support frame; 11. Third support frame; 12. Mounting frame; 13. First conveyor; 14. Fine material filter belt; 15. Vibration assembly; 1501. Second motor; 1502. Second pulley; 1503. Second conveyor belt; 1504. Arc plate; 16. Second conveyor; 17. Guide plate; 18. Filter ring; 19. Bump. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figure 1-Figure 3 、 Figure 5-Figure 7 and Figure 9 , this embodiment discloses the following technical contents;

[0036] A sand and gravel screening device for UHPC concrete production, including a first support frame 1, a right mounting ring 2, a drive assembly 3, a filter barrel 4, a left mounting ring 5, a connecting frame 6, a grinding plate 7, a grinding barrel 8, a filter plate 9, a second support frame 10, a third support frame 11, a mounting frame 12, a first conveyor 13, a fine material filter belt 14, a vibrating assembly 15, a second conveyor 16, a guide plate 17, a filter ring 18, and a bump 19;

[0037] like Figure 1-Figure 3 、 Figure 5-Figure 7 and Figure 9 As shown, the top of the first support frame 1 is rotatably mounted with a right mounting ring 2, the outer side of the right mounting ring 2 is provided with a driving assembly 3, the left side of the right mounting ring 2 is fixed with a filter barrel 4 by screws, the left end of the filter barrel 4 is fixed with a left mounting ring 5 by screws, the left mounting ring 5 is rotatably mounted on the third support frame 11, the inner wall of the left mounting ring 5 is fixed with a connecting frame 6, and the outer side of the connecting frame 6 is fixed with a grinding plate 7, the left side of the left mounting ring 5 is rotatably connected to the grinding barrel 8, and the inner wall of the grinding barrel 8 is fixed with a filter plate 9, the bottom end of the grinding barrel 8 is fixed with a filter ring 18, and the inner wall of the filter ring 18 is glued with a protrusion 19, and the left and right ends of the grinding barrel 8 are fixed with a second support frame 10;

[0038] A first conveyor 13 is installed on the top of the mounting frame 12. A fine material filter belt 14 is glued and connected to the inner side of the first conveyor 13. A vibration component 15 for vibrating the material is provided on the inner side of the fine material filter belt 14. A second conveyor 16 is provided below the fine material filter belt 14. A material guide plate 17 fixed to the first support frame 1 is provided on the inner side of the right mounting ring 2. The filter barrel 4, the grinding barrel 8, the fine material filter belt 14 and the second conveyor 16 are all arranged with the left side lower and the right side higher.

[0039] When screening sand and gravel, the right mounting ring 2 is supported by the first support frame 1, and the left mounting ring 5 is supported by the third support frame 11, thereby supporting the filter barrel 4 inside the left mounting ring 5 and the right mounting ring 2. The external conveying equipment throws the sand and gravel to be filtered onto the guide plate 17, and then falls into the interior of the filter barrel 4 from the guide plate 17. After being filtered by the filter barrel 4, it flows downward along the inclined surface of the filter barrel 4. The sand and gravel with a particle size smaller than the diameter of the filter hole of the filter barrel 4 passes through the filter barrel 4 and falls on the fine material filter belt 14. After being filtered by the fine material filter belt 14, the finer sand and gravel pass through the filter holes of the fine material filter belt 14 and fall onto the second conveyor 16.

[0040] During the sand and gravel filtering process of the filter barrel 4, the driving assembly 3 drives the filter barrel 4 to rotate, thereby rotating the connecting frame 6 and the grinding plate 7. The rotation of the filter barrel 4 is used to improve the filtering efficiency. The vibration assembly 15 shakes the fine material filter belt 14 made of elastic material to improve the filtering efficiency of the fine material filter belt 14.

[0041] The sand and gravel with a particle size larger than that of the filter barrel 4 enters the interior of the grinding barrel 8. Three groups of filter plates 9 are fixed inside the grinding barrel 8, and the filter hole diameters of the three groups of filter plates 9 gradually increase from left to right. The sand and gravel are screened by the three groups of filter plates 9 and divided into three groups. The connecting frame 6 and the grinding plate 7 rotate to grind the sand and gravel. The sand and gravel are located at the angle between the filter ring 18 and the filter plate 9. The protrusions 19 provided on the filter ring 18 cooperate with the protrusion structure on the grinding plate 7 to achieve grinding. The ground sand and gravel pass through the filter ring 18 and fall onto the fine material filter belt 14.

[0042] The three groups of filter plates 9 and the three groups of grinding plates 7 are used to grind the sieved sand and gravel according to different particle sizes, thereby improving the grinding effect and preventing most of the sand and gravel from being ground into sand and gravel with smaller particle sizes due to friction. Within the required particle size range, the distances between the three groups of grinding plates 7 from the left to the right and the filter ring 18 gradually increase (due to the small size difference between the three groups of grinding plates 7, it is difficult to clearly observe the difference from the figure). The grinding plate 7 on the far right needs to grind sand and gravel with the largest particle size range, so the distance between the grinding plate 7 on the far right and the filter ring 18 is the largest. All three groups of grinding plates 7 can collide with the sand and gravel to crack the sand and gravel, so that the particle size range of the sand and gravel is within the required standard range;

[0043] The filter barrel 4 and the left mounting ring 5 drive the connecting frame 6 and the grinding plate 7 to rotate, saving power equipment;

[0044] Example 2: Please refer to Figure 1 and Figure 8 , this embodiment discloses the following technical contents;

[0045] The right mounting ring 2 is rotatably mounted on the top of the first supporting frame 1, and a driving assembly 3 is provided on the outside of the right mounting ring 2. A filter barrel 4 is fixed to the left side of the right mounting ring 2 by screws. The driving assembly 3 includes a first motor 301, a first pulley 302, a first transmission belt 303, a gear 304 and a gear ring 305. The first motor 301 is fixed to the first supporting frame 1, and the output end of the first motor 301 is fixed with the first pulley 302. The outer side of the first pulley 302 is sleeved with the first transmission belt 303, and a gear 304 is fixed to the left side of the first pulley 302 at the top of the first transmission belt 303. The gear 304 is rotatably mounted on the first supporting frame 1, and the top of the gear 304 is meshed with the gear ring 305, and the inner side of the gear ring 305 is fixed with the right mounting ring 2;

[0046] The first motor 301 drives the first pulley 302 to rotate, and the first transmission belt 303 drives the two sets of first pulleys 302 to rotate, so that the gear 304 rotates, which drives the gear ring 305 to rotate, thereby rotating the right mounting ring 2, the filter barrel 4 and the left mounting ring 5, and further drives the connecting frame 6 and the grinding plate 7 to rotate and grind the sandstone;

[0047] Example 3: Please refer to Figure 2 and Figure 4 , this embodiment discloses the following technical contents;

[0048] A vibration assembly 15 for vibrating the material is provided on the inner side of the fine material filter belt 14. The vibration assembly 15 includes a second motor 1501, a second pulley 1502, a second transmission belt 1503 and a curved plate 1504. The second motor 1501 is fixed to the rear side of the second support frame 10. The output end of the second motor 1501 is fixed with the second pulley 1502, and the outer side of the second pulley 1502 is sleeved with the second transmission belt 1503. The front side of the second pulley 1502 is fixed with a curved plate 1504. The front ends of the second support frame 10 and the third support frame 11 at the left end of the grinding barrel 8 are both rotatably mounted with the front ends of the curved plate 1504. The curved plate 1504 is located on the inner side of the fine material filter belt 14.

[0049] When the fine material filter belt 14 filters sand and gravel, the second motor 1501 drives the second pulley 1502 to rotate, and the second conveyor belt 1503 drives the two groups of curved plates 1504 to rotate synchronously. The rotation of the curved plates 1504 causes the fine material filter belt 14 made of elastic material to rise and fall, thereby improving the screening effect of the fine material filter belt 14;

[0050] The above completes a series of operations of the sand and gravel screening device for UHPC concrete production. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0051] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sand and gravel screening device for UHPC concrete production, comprising a first support frame (1), a filter barrel (4), a mounting frame (12) and a second conveyor (16), characterized in that: A right mounting ring (2) is rotatably mounted on the top of the first support frame (1), a driving assembly (3) is provided on the outside of the right mounting ring (2), a filter barrel (4) is fixed to the left side of the right mounting ring (2) by screws, a left mounting ring (5) is fixed to the left end of the filter barrel (4) by screws, the left mounting ring (5) is rotatably mounted on the third support frame (11), a connecting frame (6) is fixed to the inner wall of the left mounting ring (5), and a grinding plate (7) is fixed to the outside of the connecting frame (6), the left mounting ring (5) is rotatably mounted on the third support frame (11), a connecting frame (6) is fixed to the inner wall of the left mounting ring (5), and a grinding plate (7) is fixed to the outside of the connecting frame (6), The left side of the mounting ring (5) is rotatably connected to a grinding barrel (8), and a filter plate (9) is fixed to the inner wall of the grinding barrel (8). A filter ring (18) is fixed to the bottom end of the grinding barrel (8), and a protrusion (19) is glued and connected to the inner wall of the filter ring (18). The protrusion (19) provided on the filter ring (18) cooperates with the raised structure on the grinding plate (7) to achieve grinding. The distance between the three groups of grinding plates (7) from the left to the right gradually increases from the filter ring (18). A second support frame (10) is fixed to both the left and right ends of the grinding barrel (8); A first conveyor (13) is installed at the top of the mounting frame (12), a fine material filter belt (14) is glued and connected to the inner side of the first conveyor (13), a vibration component (15) for vibrating the material is provided on the inner side of the fine material filter belt (14), a second conveyor (16) is provided below the fine material filter belt (14), a material guide plate (17) fixed to the first support frame (1) is provided on the inner side of the right mounting ring (2), three groups of filter plates (9) are fixed inside the grinding barrel (8), and the filter hole diameters of the three groups of filter plates (9) gradually increase from left to right, the filter plates (9) and the filter ring (18) are arranged perpendicular to each other, and the filter barrel (4), the grinding barrel (8), the fine material filter belt (14) and the second conveyor (16) are all arranged with the left side lower and the right side higher.

2. A sand and gravel screening device for UHPC concrete production according to claim 1, characterized in that: The driving assembly (3) comprises a first motor (301), a first pulley (302), a first transmission belt (303), a gear (304) and a gear ring (305), wherein the first motor (301) is fixed on the first support frame (1), the output end of the first motor (301) is fixed with the first pulley (302), the outer side of the first pulley (302) is provided with a first transmission belt (303), and the left side of the first pulley (302) at the top of the first transmission belt (303) is fixed with a gear (304), the gear (304) is rotatably mounted on the first support frame (1), and the top end of the gear (304) is meshedly connected with the gear ring (305).

3. A sand and gravel screening device for UHPC concrete production according to claim 2, characterized in that: A right mounting ring (2) is fixed to the inner side surface of the gear ring (305).

4. The sand and gravel screening device for UHPC concrete production according to claim 1, characterized in that: The vibration component (15) comprises a second motor (1501), a second pulley (1502), a second transmission belt (1503) and an arc-shaped plate (1504), wherein the second motor (1501) is fixed to the rear side of the second support frame (10), the second pulley (1502) is fixed to the output end of the second motor (1501), and the second transmission belt (1503) is sleeved on the outer side of the second pulley (1502), and the arc-shaped plate (1504) is fixed to the front side of the second pulley (1502).

5. A sand and gravel screening device for UHPC concrete production according to claim 4, characterized in that: The front ends of the second support frame (10) and the third support frame (11) at the left end of the grinding barrel (8) are both rotatably mounted with the front ends of the arc-shaped plates (1504).

6. A sand and gravel screening device for UHPC concrete production according to claim 4, characterized in that: The arc-shaped plate (1504) is located on the inner side of the fine material filter belt (14).

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