Sand screening device for engineering construction

Abstract

The utility model relates to the field of engineering construction, in particular to a sand screening device for engineering construction. A drying assembly is arranged on one side of a feeding port of the roller and comprises a fixing cylinder, a plurality of sets of partition plates distributed annularly are arranged on the inner wall of the fixing cylinder, cutting discs are arranged among the multiple sets of partition plates, and a plurality of cutting openings are formed in the ends, close to the inner wall of the fixing cylinder, of the cutting discs; according to the sand cutting device, the multiple sets of partition plates and the cutting discs are arranged, in the process that sand blocks naturally roll downwards from gaps among the multiple sets of partition plates in the fixing cylinder, the connecting rods rotate to drive the cutting discs to rotate, sand crushing and large sand scattering are completed, and after the air pipe is started, input hot air is blown out from the air outlet holes along the airflow channel to dry the sand; the moisture in the sand is reduced, so that the sand adhered to the surface of the screen cannot be adhered to the surface of the screen due to damp, and the sand screening efficiency is effectively improved when the roller rolls.

Description

Technical Field

[0001] The utility model relates to the field of engineering construction, in particular to a sand screening device for engineering construction. Background Art

[0002] In the field of engineering construction, sand is one of the indispensable raw materials for making concrete. The fine sand used to prepare concrete is required to be clean and free of impurities to ensure the quality of concrete. The coarseness of sand is expressed by the fineness modulus. Sand is divided into three specifications: coarse, medium and fine according to the fineness modulus. Under the condition of the same amount of sand, if the sand is too coarse, the mixed concrete will have poor cohesion and will easily produce segregation and bleeding. If the sand is too fine, the total surface area of ​​the sand will increase. Although the mixed concrete will have better cohesion and will not easily produce segregation and bleeding, it will shrink greatly after hardening and micro cracks will easily appear on the surface. Therefore, the proportion of sand in construction is more important.

[0003] Publication No.: CN215964654U discloses a high-efficiency sand screening device for municipal engineering construction, including a support plate, a mounting frame, a rolling drum, a motor, a driving gear, a driven gear, a spiral blade and a sleeve; a feed port and a discharge port are respectively provided at both ends of the rolling drum, and a plurality of mounting grooves are arranged on the outer circumference of the rolling drum; a screen is provided inside each of the plurality of mounting grooves; the spiral blade is installed inside the rolling drum, and the spiral blade is connected to the inner wall of the rolling drum; the sleeve is rotatably connected to the rolling drum, and one side of the lower end of the sleeve is connected to the upper end surface of the support plate; the motor is installed on the mounting frame, and the output shaft of the motor is connected to the driving gear; the driven gear is sleeved on the outer circumference of the rolling drum, and the driven gear is meshed with the driving gear for transmission; the lower end of the support plate is respectively connected to a plurality of support legs, and a plurality of strip through holes are provided on the support plate.

[0004] In the above-mentioned prior art, a rotating rolling drum is provided, and the inside of the drum is divided into screening areas corresponding to coarse sand and fine sand, so as to screen out coarse sand and fine sand. However, in the construction site, a lot of sand is piled in the open air, which is easy to absorb moisture and agglomerate. The wet sand grains are easy to adhere to the inner wall of the drum, affecting the sand screening efficiency. In addition, a lot of fine sand is easy to be entrained in the sand blocks, and fall from the coarse sand area, affecting the sand screening effect. For this reason, we propose a sand screening device for engineering construction. Utility Model Content

[0005] The purpose of the utility model is to provide a sand screening device for engineering construction to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, a sand screening device for engineering construction comprises a drum; a drying assembly is arranged on one side of the feed port of the drum, the drying assembly comprises a fixed drum, the inner wall of the fixed drum is provided with a plurality of groups of dividing plates distributed in a ring shape, cutting discs are arranged between the plurality of groups of dividing plates, a plurality of cutting openings are arranged on one end of the cutting disc close to the inner wall of the fixed drum, connecting rods are fixedly connected at the centers between the plurality of cutting discs, a hot air blower is fixedly installed on the top of the fixed drum, an air duct is fixedly installed on the air outlet end of the hot air blower, and the other end of the air duct is connected to the connecting rod.

[0007] Furthermore: the outer wall of the connecting rod is provided with a plurality of through holes, and the lower end of the air duct is sleeved on the outer side of the through holes.

[0008] Furthermore: an air flow channel is provided inside the connecting rod, and an air outlet hole is provided on one side of the cutting disc close to the drum, and both ends of the air flow channel are respectively connected to the through hole and the air outlet hole.

[0009] Furthermore: the interior of the drum is paved with a plurality of screens with different apertures, and the shape of the screens is adapted to the shape of the inner wall of the drum.

[0010] Furthermore: a protective tube is arranged on the outer side of the drum, and a base is arranged on the bottom of the protective tube.

[0011] Furthermore: the bottom of the protective tube is connected to the inside of the base, and partitions are arranged inside the protective tube and the base corresponding to the distribution position of the screen inside the drum.

[0012] Furthermore: a motor is fixedly installed at one end of the casing, a roller is fixedly connected to the output end of the motor, an inner spiral shaft is fixedly connected to the inside of the roller, and one end of the connecting rod is fixedly connected to one end of the inner spiral shaft.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In the utility model, a plurality of groups of dividing and cutting discs are arranged. When the sand blocks naturally roll downward from the gaps between a plurality of groups of partitions in the fixed cylinder, the connecting rod rotates and drives the cutting discs to rotate, thereby completing the crushing of the sand and breaking up the large pieces of sand. After the air duct is started, the input hot air is blown out from the air outlet along the air flow channel to dry the sand and reduce the moisture therein, so that the sand adhered to the surface of the screen will not adhere to the surface of the screen due to moisture, thereby effectively improving the sand screening efficiency when the drum rolls. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic elevation diagram of a sand screening device for engineering construction according to the utility model;

[0016] Figure 2This is a schematic diagram of the structure of a sand screening device for engineering construction according to the utility model;

[0017] Figure 3 It is a partially enlarged schematic diagram of a sand screening device for engineering construction of the utility model;

[0018] Figure 4 It is a schematic diagram of a cutting disc close to a drum in a sand screening device for engineering construction according to the utility model.

[0019] In the figure: 1. drum; 2. drying assembly; 3. fixed drum; 4. dividing plate; 5. cutting disc; 6. cutting opening; 7. connecting rod; 8. hot air blower; 9. air duct; 10. through hole; 11. air outlet; 12. protective tube; 13. base; 14. partition; 15. motor; 16. inner spiral shaft. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The figure shows a preferred embodiment of the utility model, a sand screening device for engineering construction, comprising a drum 1; a drying assembly 2 is arranged on one side of the feed port of the drum 1, the drying assembly 2 comprises a fixed drum 3, the inner wall of the fixed drum 3 is provided with a plurality of groups of dividing plates 4 distributed in a ring shape, cutting discs 5 are arranged between the plurality of groups of dividing plates 4, the cutting discs 5 are provided with a plurality of cutting openings 6 at one end close to the inner wall of the fixed drum 3, the centers between the plurality of cutting discs 5 are fixedly connected with connecting rods 7, a hot air blower 8 is fixedly installed on the top of the fixed drum 3, an air duct 9 is fixedly installed on the air outlet end of the hot air blower 8, and the other end of the air duct 9 is connected with the connecting rod 7.

[0022] Specifically, a plurality of through holes 10 are formed on the outer wall of the connecting rod 7, and the lower end of the air duct 9 is sleeved on the outside of the through hole 10; the hot air blown by the hot air blower 8 is transported inside the air duct 9 and enters the connecting rod 7 along the through hole 10. It should be added that the connecting rod 7 is cylindrical in shape and will not affect the airflow input when rotating.

[0023] Among them, an air flow channel is opened inside the connecting rod 7, and an air outlet hole 11 is opened on the side of the cutting disc 5 close to the drum 1. The two ends of the air flow channel are respectively connected with the through hole 10 and the air outlet hole 11; the hot air input by the air duct 9 is blown out from the air outlet hole 11 along the air flow channel to dry the sand and reduce the moisture therein.

[0024] It can be understood that in order to distinguish coarse sand, medium sand and fine sand, multiple sections of screens with different apertures are laid inside the drum 1. In this embodiment, only coarse sand and fine sand are distinguished. The shape of the screen is adapted to the shape of the inner wall of the drum 1. After being filtered by the screen, the sand can fall into the casing 12.

[0025] In order to prevent the sieved sand from being blown away, a casing 12 is provided on the outside of the drum 1, and a base 13 is provided at the bottom of the casing 12, and the base 13 is used to store the sieved sand.

[0026] Specifically, the bottom of the casing 12 is connected to the inside of the base 13, and a partition 14 is provided inside the casing 12 and the base 13 corresponding to the distribution position of the screen inside the drum 1. The partition 14 is arranged at the position where the apertures of the two groups of screens change, so as to separate the sand of different particle sizes after filtration.

[0027] Among them, a motor 15 is fixedly installed at one end of the casing 12, the output end of the motor 15 is fixedly connected to the drum 1, the interior of the drum 1 is fixedly connected to an inner screw shaft 16, and one end of the connecting rod 7 is fixedly connected to one end of the inner screw shaft 16; after the motor 15 is started, it can drive the drum 1 to rotate in the casing 12, and when the drum 1 rotates, the connecting rod 7 is driven to rotate through the inner screw shaft 16.

[0028] It should be added that Figure 1 As shown, the drum 1 and the fixed drum 3 in the device are obliquely distributed, so that the sand entering from the feed port can slide down naturally. Among several groups of dividing plates 4, the closer to the outside, the fewer the dividing plates 4 are, so as to facilitate the agglomerated sand to pass through the gaps between adjacent dividing plates 4. Similarly, the closer to the outside of the cutting disc 5, the larger the size of the outer cutting opening 6 is, so as to facilitate the passage of sand blocks. The number of dividing plates 4 close to the inside gradually increases to increase the crushing frequency of the sand. Finally, it should be noted that the outer periphery of the cutting disc 5 is provided with an oblique angle close to the drum 1, so as to facilitate the pushing of sand to the side of the drum 1.

[0029] In this embodiment, the sand to be screened is put into the fixed cylinder 3 from the feed port on one side of the fixed cylinder 3. After the motor 15 is started, the drum 1 can be driven to rotate in the casing 12. When the drum 1 rotates, the connecting rod 7 is driven to rotate through the inner screw shaft 16, and the sand blocks naturally roll down from the gaps between the groups of dividing plates 4 in the fixed cylinder 3. During the process, the connecting rod 7 rotates and drives the cutting disc 5 to rotate, completing the crushing of the sand and breaking up the large pieces of sand.

[0030] After the air duct 9 is started, the input hot air is blown out from the air outlet 11 along the air flow channel to dry the sand and reduce the moisture therein. The air flow can also assist the flow of sand. The sand is crushed and enters the drum 1. The rotating drum 1 cooperates with the spiral blades on the inner spiral shaft 16 to expand the movement path of the sand to a limited extent. The screened sand passes through the screen and enters the casing 12 and is stored by the base 13. The partition 14 can separate sand of different particle sizes. It should be added that after the hot air blown out by the hot air blower 8 enters the fixed cylinder 3, it can naturally flow into the drum 1, so that the sand adhered to the surface of the screen will not adhere to the surface of the screen due to moisture, so that the sand screening efficiency is effectively improved when the drum 1 rolls, and the screened sand can be taken out after opening the movable door on one side of the base 13.

[0031] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly stipulated and limited, the terms "set", "install", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A sand screening device for engineering construction, comprising a drum (1); characterized in that: A drying assembly (2) is arranged on one side of the feed port of the drum (1), and the drying assembly (2) comprises a fixed cylinder (3). The inner wall of the fixed cylinder (3) is provided with a plurality of groups of dividing plates (4) distributed in a ring shape, and cutting discs (5) are arranged between the plurality of groups of dividing plates (4). The cutting discs (5) are provided with a plurality of cutting openings (6) at one end close to the inner wall of the fixed cylinder (3), and connecting rods (7) are fixedly connected at the centers between the plurality of cutting discs (5). A hot air blower (8) is fixedly installed on the top of the fixed cylinder (3), and an air duct (9) is fixedly installed at the air outlet end of the hot air blower (8), and the other end of the air duct (9) is connected to the connecting rod (7).

2. A sand screening device for engineering construction according to claim 1, characterized in that: The outer wall of the connecting rod (7) is provided with a plurality of through holes (10), and the lower end of the air duct (9) is sleeved on the outer side of the through holes (10).

3. A sand screening device for engineering construction according to claim 2, characterized in that: An air flow channel is provided inside the connecting rod (7), and an air outlet hole (11) is provided on one side of the cutting disc (5) close to the drum (1). Both ends of the air flow channel are respectively connected to the through hole (10) and the air outlet hole (11).

4. The sand screening device for engineering construction according to claim 1, characterized in that: The interior of the drum (1) is provided with a plurality of screens with different apertures, and the shape of the screens is adapted to the shape of the inner wall of the drum (1).

5. A sand screening device for engineering construction according to claim 4, characterized in that: A protective tube (12) is arranged on the outer side of the drum (1), and a base (13) is arranged on the bottom of the protective tube (12).

6. A sand screening device for engineering construction according to claim 5, characterized in that: The bottom of the protective tube (12) is connected to the inside of the base (13), and partitions (14) are arranged inside the protective tube (12) and the base (13) at positions corresponding to the distribution of the screen inside the drum (1).

7. The sand screening device for engineering construction according to claim 5, characterized in that: A motor (15) is fixedly mounted on one end of the casing (12); the output end of the motor (15) is fixedly connected to a roller (1); the interior of the roller (1) is fixedly connected to an inner screw shaft (16); and one end of the connecting rod (7) is fixedly connected to one end of the inner screw shaft (16).

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