Sand screening equipment for constructional engineering

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to sand screening equipment for building engineering, which comprises a bottom plate, a second gear ring is fixedly connected to the upper side of the bottom plate, and a first gear ring which is eccentrically arranged relative to the second gear ring is in meshed transmission connection with the inner side of the second gear ring; the upper side of the bottom plate is fixedly connected with a volute shell, the bottom of the bottom plate is fixedly connected with a support, the bottom plate is rotationally connected with an impeller, the impeller and the second gear ring are coaxial, the top of the impeller is fixedly connected with a connecting disc, the connecting disc is rotationally connected with the first screen drum, and the interior of the impeller is fixedly connected with a second screen drum. The centrifugal force and vibration are generated at the same time, the sand screening efficiency is greatly improved, the screening requirement of a large amount of sand is met, by arranging the outer barrel and the blades, airflow is generated while the outer barrel rotates and blows to the screened sand, and therefore small-particle impurities in the sand are removed, and the situation that the impurities affect the quality of cement mortar is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, in particular to sand screening equipment for construction engineering. Background Art

[0002] Currently, concrete mixed with sand and cement is often used in the construction process. In the process of transporting sand to the construction site, impurities and larger stones are often mixed in. Concrete requires pure sand. Generally, sand and stone need to be screened when used. The construction site generally uses an inclined screen, and workers pour sand into the sand screening net for screening.

[0003] The traditional manual sand screening method is labor-intensive and has low screening efficiency. Therefore, vibrating screens are usually used to screen sand in engineering projects. However, the screening efficiency of existing vibrating screens for sand is still not high, especially when the demand for sand is large and it often cannot meet the demand. In addition, the vibrating screen cannot remove impurities such as dust with smaller particles mixed in the sand during screening. The use of sand containing impurities will affect the viscosity of cement mortar and affect the quality of cement.

[0004] A Chinese patent with authorization announcement number CN211563691U discloses a sand screening device for construction projects, which specifically relates to the field of construction technology, including a box body, a spiral rod is provided at the top of the box body, a shaft is provided at the connection between the box body and the spiral rod, the box body and the spiral rod are movably connected through the shaft, a screening box is provided outside the spiral rod, the screening box is fixedly connected to the box body, a hopper is provided on one side of the top of the screening box, and the screening box is fixedly connected to the hopper. The motor drives the screw rod to rotate, and the screw rod pushes the sand. The first sand screening net screens the sand, and larger impurities and agglomerated sand fall from between the first sand screening net and the screening box. The second sand screening net performs secondary screening. The rotation of the screw rod is beneficial to the screening of sand on the one hand, and on the other hand, it is beneficial to the delivery of larger impurities, thereby improving the screening efficiency. The first gear is set as a larger gear, and the second gear is set as a smaller gear. The first gear drives the second gear, and the second gear drives the fan blades to rotate. The fan blades blow the dust and smaller impurities in the sand. The dust and smaller impurities enter the water tank from the ash outlet and dissolve in the water. Setting the first gear and the second gear is beneficial to accelerating the rotation of the fan blades, blowing away dust and smaller impurities, and avoiding impurities in the sand that affect the viscosity of the cement mortar.

[0005] However, the above has the following shortcomings:

[0006] The above patent uses a spiral rod to transport sand and move it through the first sand screening net for screening. However, when there is too much sand, a large amount of sand falls into the second sand screening net before passing through the first sand screening net in time, and the screening and processing capacity of the second sand screening net is limited. When there is too much sand, some sand will not pass through the second sand screening net and will be discharged together with impurities, causing waste.

[0007] The above patent uses the rotation of fan blades to generate airflow to blow the sand in the falling process to remove smaller impurities mixed in the sand. However, in this way, part of the sand will also be blown away, or discharged from the equipment or enter the water tank, causing waste. Utility Model Content

[0008] In order to overcome the deficiencies of the prior art, the utility model solves the technical problem that, by means of an eccentrically arranged first sieve drum, the first sieve drum generates vibration when rotating, and because the first gear ring is meshed with the second gear ring, the first sieve drum can rotate on its own to generate centrifugal force while eccentrically rotating, and then under the joint action of high-frequency vibration and centrifugal force, the speed at which sand passes through the first sieve drum is greatly improved, thereby improving the screening efficiency of the sand, and by arranging an impeller in conjunction with a volute-shaped casing, an airflow is generated to blow toward the sand being screened while the impeller rotates, thereby effectively removing impurities such as dust mixed in the sand, so as to ensure the quality of cement mortar subsequently made of sand, and compared with the comparative document, the screened sand is intercepted by the second sieve drum, and no waste of sand is caused.

[0009] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sand screening device for construction engineering, characterized in that it includes a base plate, an upper side of the base plate is fixedly connected to a first gear ring, an inner side of the first gear ring is meshingly connected to a second gear ring which is eccentrically arranged relative to the first gear ring, a first sieve cylinder is fixedly connected inside the second gear ring, a shell is fixedly connected to the upper side of the base plate, and a bracket is fixedly connected to the bottom of the base plate.

[0010] An impeller is rotatably connected to the bottom plate, the impeller is coaxial with the first gear ring, a connecting disk is fixedly connected to the top of the impeller, the connecting disk is rotatably connected to the first screen drum, and the housing is in a volute shape.

[0011] A second screen cylinder is fixedly connected inside the impeller, and a plurality of sand discharge holes are evenly distributed on the bottom plate between the first screen cylinder and the second screen cylinder.

[0012] A driven wheel is fixedly connected to the outer side of the bottom of the impeller, a motor is fixedly connected to the bottom side of the bottom plate at one side of the impeller, a power output end of the motor passes through the bottom plate and is transmission-connected to a driving wheel, and the driving wheel and the driven wheel are transmission-connected via a transmission belt.

[0013] A shield covering the first gear ring and the second gear ring is rotatably connected to the outer side of the bottom of the first screen cylinder, and the shield is closely fitted with the bottom plate and rotates relatively.

[0014] The top of the shell is fixedly connected with a hopper extending into the first screen cylinder, the top of the shell is provided with a plurality of air holes around the outside of the hopper, and the bottom cover is threadedly connected with the bottom side of the shell.

[0015] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0016] The inner cylinder is used to synchronously perform eccentric rotation and self-rotation, which generates centrifugal force and vibration at the same time, greatly improving the sand screening efficiency to meet the screening needs of large amounts of sand.

[0017] By setting up the outer cylinder and the blades, an air flow is generated when the outer cylinder rotates to blow towards the sand being screened, thereby removing impurities with smaller particles in the sand and preventing the impurities from affecting the quality of the cement mortar. Compared with the comparative documents, the screened sand is intercepted by the second screen cylinder, and no waste of sand is caused. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional schematic diagram of this patent.

[0019] Figure 2 This is a side view of the patent.

[0020] Figure 3 for Figure 2 Stereoscopic cross-sectional view at AA in the middle.

[0021] Figure 4 for Figure 3 A partial enlarged view of point C in the middle.

[0022] Figure 5 for Figure 2 Three-dimensional cross-sectional view at the middle BB.

[0023] Figure 6 This is a schematic diagram of the internal structure of this patent.

[0024] Explanation of the reference numerals: bottom plate 10; bracket 11; housing 12; air hole 13; hopper 14; motor 15; driving wheel 16; driven wheel 17; transmission belt 18; sand discharge hole 19; bottom cover 20; protective cover 21; first sieve drum 22; connecting plate 23; impeller 24; second sieve drum 25; first gear ring 26; second gear ring 27. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0026] like Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, a sand screening device for construction engineering includes a base plate 10, on which an impeller 24 is rotatably connected, a second screen drum 25 is fixedly connected inside the impeller 24, a shell 12 covering the impeller 24 is fixedly connected on the upper side of the base plate 10, the shell 12 is volute-shaped, and a plurality of through air holes 13 are evenly distributed in the circumferential direction at the top of the shell 12 at a position corresponding to the impeller 24, a driven wheel 17 is fixedly connected to the outer side of the bottom end of the impeller 24, a motor 15 is fixedly connected to the bottom of the base plate 10 at one side of the impeller 24, a power output end of the motor 15 passes through the base plate 10 and is transmission-connected to a driving wheel 16, a transmission belt 18 is transmission-connected between the driving wheel 16 and the driven wheel 17, and a bracket 11 is fixedly connected to the bottom of the base plate 10.

[0027] By arranging the impeller 24 in conjunction with the volute housing 12, an airflow is generated to blow toward the sand being screened while the impeller 24 rotates, thereby effectively removing impurities such as dust mixed in the sand to ensure the quality of cement mortar subsequently made from the sand.

[0028] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, a connecting disk 23 is fixedly connected to the top of the impeller 24, and a first sieve drum 22 is rotatably connected inside the connecting disk 23. The first sieve drum 22 is eccentrically arranged compared to the impeller 24, and a second gear ring 27 is fixedly connected to the outer side of the bottom of the first sieve drum 22. A first gear ring 26 is fixedly connected to the bottom plate 10, and the first gear ring 26 is coaxial with the impeller 24. The first gear ring 26 and the second gear ring 27 are meshingly connected for transmission. A shield 21 covering the first gear ring 26 and the second gear ring 27 is rotatably connected to the bottom of the first sieve drum 22, and the shield 21 fits tightly with the bottom plate 10 and rotates relative to each other.

[0029] The eccentrically arranged first sieve drum 22 generates vibration when it rotates, and because the first gear ring 26 is meshed with the second gear ring 27, the first sieve drum 22 can rotate on its own while eccentrically rotating to generate centrifugal force, thereby greatly improving the speed at which sand passes through the first sieve drum 22 under the combined action of high-frequency vibration and centrifugal force, thereby improving the screening efficiency of the sand.

[0030] like Figure 3 , Figure 5 and Figure 6 As shown, a plurality of through sand discharge holes 19 are evenly distributed in the circumferential direction on the bottom plate 10 in the annular area between the second sieve drum 25 and the first sieve drum 22, a hopper 14 extending into the first sieve drum 22 is fixedly connected to the top of the shell 12 in the middle of the plurality of air holes 13, and a bottom cover 20 is threadedly connected at the center of the bottom plate 10.

[0031] By providing the sand discharge holes 19, after the sieved sand is intercepted by the second sieve drum 25, the sand is allowed to flow out directly from the sand discharge holes 19 under the action of gravity, which is convenient for operators to collect. By providing the hopper 14, the sand to be sieved can be easily put into the equipment. After the screening is completed, the bottom cover 20 can be removed to discharge the larger impurities remaining in the first sieve drum 22.

[0032] In this embodiment, initially, the operator connects the patent to the power supply. When screening is required, the operator first starts the motor 15. Due to the transmission connection between the driving wheel 16 and the driven wheel 17, the impeller 24 is driven to rotate at a high speed. Since the connecting disk 23 connects the impeller 24 and the first screen drum 22, the impeller 24 can drive the first screen drum 22 to rotate eccentrically while rotating at a high speed.

[0033] At the same time, since the first gear ring 26 is meshed with the second gear ring 27 and is connected to each other by transmission, the first sieve drum 22 can also rotate on its own during the eccentric rotation of the first sieve drum 22. At this time, the operator puts the sand to be screened into the first sieve drum 22 through the hopper 14. The sand is then subjected to the vibration generated by the eccentric rotation of the first sieve drum 22 and the centrifugal force generated by the rotation of the first sieve drum 22, so that the sand with a suitable particle diameter is quickly screened out from the first sieve drum 22, while the larger impurities are retained in the first sieve drum 22.

[0034] At the same time, the sand sieved from the first sieve drum 22 enters the space between the second sieve drum 25 and the first sieve drum 22, and the sand is retained by the second sieve drum 25 and eventually flows out from the sand discharge hole 19 under the action of gravity. The operator can collect the sieved sand below the sand discharge hole 19.

[0035] At the same time, since the shell 12 is in a volute shape, the effect of a centrifugal fan is generated during the rotation of the impeller 24, and the outside air is sucked in from the air hole 13 and finally blown out from the opening of the shell 12, thereby generating an airflow from the inside to the outside in the shell 12. When sand enters the space between the second sieve cylinder 25 and the first sieve cylinder 22, the airflow continuously blows into the sand, and impurities such as dust with a smaller diameter mixed in the sand are blown out from the second sieve cylinder 25, and the impurities are blown out of the shell 12 together with the airflow, leaving only sand with a uniform and appropriate diameter to fall out from the sand discharge hole 19.

[0036] After the screening is completed, the operator collects and removes all the screened sand, and then screws open the bottom cover 20 to connect the inside of the first sieve drum 22 with the outside. The larger impurities remaining in the first sieve drum 22 are then discharged from the first sieve drum 22, and the operator installs the bottom cover 20 again to complete the screening work.

[0037] The first sieve drum 22, the second sieve drum 25 and the motor 15 are mature existing technologies and will not be described in detail herein.

[0038] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0039] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0040] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A sand screening device for construction engineering, characterized in that: The invention comprises a bottom plate (10), a first toothed ring (26) being fixedly connected to the upper side of the bottom plate (10), a second toothed ring (27) being meshingly connected to the inner side of the first toothed ring (26) and eccentrically arranged relative to the first toothed ring (26), a first screen drum (22) being fixedly connected to the inner side of the second toothed ring (27), a housing (12) being fixedly connected to the upper side of the bottom plate (10), and a bracket (11) being fixedly connected to the bottom of the bottom plate (10).

2. A sand screening device for construction engineering according to claim 1, characterized in that: An impeller (24) is rotatably connected to the bottom plate (10), the impeller (24) is coaxial with the first gear ring (26), a connecting plate (23) is fixedly connected to the top of the impeller (24), the connecting plate (23) is rotatably connected to the first screen drum (22), and the housing (12) is in a volute shape.

3. A sand screening equipment for construction engineering according to claim 2, characterized in that: A second sieve drum (25) is fixedly connected inside the impeller (24), and a plurality of sand discharge holes (19) are evenly distributed on the bottom plate (10) between the first sieve drum (22) and the second sieve drum (25).

4. A sand screening device for construction engineering according to claim 2, characterized in that: A driven wheel (17) is fixedly connected to the outer side of the bottom of the impeller (24); a motor (15) is fixedly connected to the bottom side of the bottom plate (10) at one side of the impeller (24); a power output end of the motor (15) passes through the bottom plate (10) and is transmission-connected to a driving wheel (16); and the driving wheel (16) and the driven wheel (17) are transmission-connected via a transmission belt (18).

5. The sand screening equipment for construction engineering according to claim 1, characterized in that: A shield (21) covering the first gear ring (26) and the second gear ring (27) is rotatably connected to the outer side of the bottom of the first screen drum (22); the shield (21) and the bottom plate (10) are tightly fitted and rotate relative to each other.

6. A sand screening device for construction engineering according to claim 1, characterized in that: A hopper (14) extending into the first screen cylinder (22) is fixedly connected to the top of the shell (12), a plurality of air holes (13) are opened around the outside of the hopper (14) at the top of the shell (12), and a bottom cover (20) is threadedly connected to the bottom side of 22 in the shell (10).

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