Sand screening machine for constructional engineering

Abstract

The utility model belongs to the field of sand screening machines, and particularly relates to a constructional engineering sand screening machine which comprises a base, the top of the base is fixedly connected with a machine frame, and one side of the machine frame is fixedly connected with a positioning plate. Through the arrangement of the cleaning mechanism, the outer surface of the rotary screen can be knocked, so that gravel blocked in the hole diameter of the rotary screen automatically falls off, the gravel screening efficiency is improved, the rotary screen is automatically cleaned, and the maintenance efficiency of workers can be reduced; small-particle gravels can fall to the conveying belt through the apertures in the surface of the drum screen, and can be conveyed by the conveying mechanism, so that the working efficiency of workers is improved, and the problems that when an existing sand screening machine is used for screening the gravels, a screen mesh is easily extruded and blocked, the workers need to manually clean the screen mesh, and the labor intensity is high are solved. And the problem that the workload of workers is increased due to the fact that screened gravel needs to be conveyed manually after being discharged is solved.

Description

Technical Field

[0001] The utility model relates to the field of sand screening machines, and specifically relates to a sand screening machine for construction projects. Background Art

[0002] A sand screening machine is a device commonly used in fields such as construction projects and mines. After the crushed stones enter the drum, on the one hand, they are screened as the drum rotates, and on the other hand, the stones with larger particle sizes flow forward along the slope of the drum, and are gradually screened out through sieve meshes of different mesh sizes. The stones that are not large fall into their respective funnels after being screened out, and then are transported out manually or flow automatically to the finished product pile.

[0003] When the existing sand screening machine screens sand and gravel, the sieve mesh is prone to being squeezed and blocked, and it requires manual cleaning by workers. Moreover, after the screened sand and gravel are discharged, it needs to be transported manually, thus increasing the workload of the workers. Therefore, a sand screening machine for construction projects is proposed to solve the above problems. Summary of the Utility Model

[0004] In order to make up for the deficiencies of the existing technology and solve the problems that when the existing sand screening machine screens sand and gravel, the sieve mesh is prone to being squeezed and blocked, and it requires manual cleaning by workers, and after the screened sand and gravel are discharged, it needs to be transported manually, thus increasing the workload of the workers, the utility model proposes a sand screening machine for construction projects.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a sand screening machine for construction projects, including a base, a frame is fixedly connected to the top of the base, a positioning plate is fixedly connected to one side of the frame, a first motor is fixedly installed on the top of the positioning plate, an output end of the first motor is fixedly connected to a transmission rod, one end of the transmission rod is rotationally connected to the surface of the frame through a bearing, a drum screen is fixedly sleeved on the surface of the transmission rod, the drum screen is arranged in the inner cavity of the frame, a cleaning mechanism is arranged on the surface of the frame, and a conveying mechanism is arranged in the inner cavity of the base;

[0006] The cleaning mechanism includes a fixed frame, the fixed frame is fixedly installed on the surface of the frame, a limit shell is fixedly installed in the inner cavity of the fixed frame, a second motor is fixedly installed on one side of the limit shell, an output end of the second motor penetrates into the inner cavity of the limit shell and is fixedly connected to a positioning rod, one end of the positioning rod is rotationally connected to the inner wall of the limit shell, two cams are fixedly sleeved on the surface of the positioning rod, four tension springs are arranged in the inner cavity of the limit shell, one end of the tension spring is fixedly connected to the inner wall of the limit shell, the other end of the tension spring is fixedly connected to a fixing plate, the fixing plate is arranged at the bottom of the cam, a fixing rod is fixedly connected to the bottom of the fixing plate, and a convex block is fixedly sleeved on the surface of the fixing rod, and the convex block is arranged at the upper end of the drum screen.

[0007] Preferably, the conveying mechanism includes a third motor fixedly installed on the surface of the base. The output end of the third motor penetrates into the inner cavity of the base and is fixedly connected to a transmission roller. One end of the transmission roller is rotatably connected to the inner wall of the base through a bearing. A conveyor belt is movably sleeved on the surface of the transmission roller. An auxiliary roller is arranged in the inner cavity of the conveyor belt. The number of the auxiliary rollers is several. Both ends of the auxiliary roller are rotatably connected to the inner wall of the base. The surface of the auxiliary roller is in contact with the inner side of the conveyor belt.

[0008] Preferably, a first material guiding shell and a second material guiding shell are fixedly installed in the inner cavity of the frame. The first material guiding shell is arranged above the conveying mechanism. The second material guiding shell is arranged at the bottom of the positioning plate. The top of the second material guiding shell is fixedly connected to the bottom of the positioning plate.

[0009] By arranging the first material guiding shell, when the drum sieve screens sand and gravel, small particle sand and gravel fall into the first material guiding shell through the apertures on the surface of the drum sieve, which is convenient for the staff to convey the small particle sand and gravel. And the large particle sand and gravel cannot pass through the apertures on the surface of the drum sieve and are discharged, so they will roll along the inner cavity of the drum sieve and fall into the inner cavity of the second material guiding shell and be discharged.

[0010] Preferably, four arc-shaped blocking strips are fixedly connected in the inner cavity of the drum sieve. The arc-shaped blocking strips are arranged staggeredly.

[0011] Preferably, two cleaning brushes are fixedly installed in the inner cavity of the fixing frame. The side of the cleaning brush away from the inner wall of the fixing frame is in contact with the surface of the drum sieve.

[0012] By arranging the cleaning brushes, the sand and gravel on the surface of the drum sieve can be cleaned when the drum sieve is working, thereby improving the maintenance efficiency of the staff.

[0013] Preferably, a support block is fixedly connected to the top of the fixing frame. One side of the support block is fixedly connected to the surface of the frame.

[0014] Preferably, retaining blocks are arranged at the four corners of the limiting shell. The top of the retaining block is fixedly connected to the inner wall of the fixing frame. The inner side of the retaining block is in contact with the surface of the limiting shell.

[0015] Preferably, a positioning ring is fixedly sleeved on the surface of the second motor. One side of the positioning ring is fixedly connected to the surface of the limiting shell.

[0016] The beneficial effects of the present utility model are as follows:

[0017] By providing a cleaning mechanism, the utility model can strike the outer surface of the drum screen, causing the sand and gravel blocked in the aperture of the drum screen to fall off automatically, improving the screening efficiency of sand and gravel, and automatically cleaning the drum screen, which can reduce the maintenance workload of workers. By providing a conveying mechanism, when the drum screen screens sand and gravel, small-particle sand and gravel will fall onto the conveyor belt through the apertures on the surface of the drum screen. At this time, the conveying mechanism can be used to convey them, thereby improving the working efficiency of workers, and solving the problems that when the existing sand screening machine screens sand and gravel, the screen is prone to extrusion and blockage, requiring manual cleaning by workers, and the screened sand and gravel need to be manually conveyed after blanking, thus increasing the workload of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is a structural sectional view of the frame, cleaning mechanism and first material guiding shell of the present utility model;

[0021] Figure 3 is a structural sectional view of the frame and drum screen of the present utility model;

[0022] Figure 4 is a structural sectional view of the cleaning mechanism of the present utility model;

[0023] Figure 5 is of the present utility model Figure 4 is an enlarged view of the structure at A in

[0024] Figure 6 is a structural sectional view of the conveying mechanism of the present utility model.

[0025] In the figure: 1. Base; 2. Frame; 3. Positioning plate; 4. First motor; 5. Transmission rod; 6. Drum sieve; 7. Cleaning mechanism; 701. Fixed frame; 702. Limit shell; 703. Second motor; 704. Positioning rod; 705. Cam; 706. Tension spring; 707. Fixed plate; 708. Fixed rod; 709. Convex block; 710. Cleaning brush; 711. Support block; 712. Retaining block; 713. Positioning ring; 8. Conveying mechanism; 801. Third motor; 802. Driving roller; 803. Conveyor belt; 804. Auxiliary roller; 9. First material guiding shell; 10. Second material guiding shell; 11. Arc-shaped baffle strip. Detailed implementation mode

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] The following combines the attached Figures 1-6 For a further detailed description of this application,

[0028] An embodiment of this application discloses a sand screening machine for construction projects. Referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , a sand screening machine for construction projects includes a base 1, a frame 2 is fixedly connected to the top of the base 1, a positioning plate 3 is fixedly connected to one side of the frame 2, a first motor 4 is fixedly installed on the top of the positioning plate 3, an output end of the first motor 4 is fixedly connected to a transmission rod 5, one end of the transmission rod 5 is rotatably connected to the surface of the frame 2 through a bearing, a drum sieve 6 is fixedly sleeved on the surface of the transmission rod 5, the drum sieve 6 is arranged in the inner cavity of the frame 2, a cleaning mechanism 7 is arranged on the surface of the frame 2, and a conveying mechanism 8 is arranged in the inner cavity of the base 1;

[0029] The cleaning mechanism 7 includes a fixing frame 701, which is fixedly installed on the surface of the frame 2. A limiting shell 702 is fixedly installed in the inner cavity of the fixing frame 701. A second motor 703 is fixedly installed on one side of the limiting shell 702. The output end of the second motor 703 penetrates into the inner cavity of the limiting shell 702 and is fixedly connected with a positioning rod 704. One end of the positioning rod 704 is rotatably connected to the inner wall of the limiting shell 702. Two cams 705 are fixedly sleeved on the surface of the positioning rod 704. Four tension springs 706 are arranged in the inner cavity of the limiting shell 702. One end of the tension spring 706 is fixedly connected with the inner wall of the limiting shell 702, and the other end of the tension spring 706 is fixedly connected with a fixing plate 707. The fixing plate 707 is arranged at the bottom of the cam 705. A fixing rod 708 is fixedly connected to the bottom of the fixing plate 707. A convex block 709 is fixedly sleeved on the surface of the fixing rod 708, and the convex block 709 is arranged at the upper end of the drum screen 6. By setting the cleaning mechanism 7, the outer surface of the drum screen 6 can be knocked, so that the sand and gravel blocked in the aperture of the drum screen 6 will fall off automatically, improving the sand and gravel screening efficiency. And the automatic cleaning of the drum screen 6 can reduce the maintenance efficiency of the staff.

[0030] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 6 , the conveying mechanism 8 includes a third motor 801, which is fixedly installed on the surface of the base 1. The output end of the third motor 801 penetrates into the inner cavity of the base 1 and is fixedly connected with a transmission roller 802. One end of the transmission roller 802 is rotatably connected to the inner wall of the base 1 through a bearing. A conveyor belt 803 is movably sleeved on the surface of the transmission roller 802. An auxiliary roller 804 is arranged in the inner cavity of the conveyor belt 803. The number of the auxiliary rollers 804 is several. Both ends of the auxiliary roller 804 are rotatably connected to the inner wall of the base 1. The surface of the auxiliary roller 804 is in contact with the inner side of the conveyor belt 803. By setting the conveying mechanism 8, when the drum screen 6 screens the sand and gravel, the small-particle sand and gravel will fall onto the conveyor belt 803 through the apertures on the surface of the drum screen 6. At this time, the conveying mechanism 8 can be used to convey it, thereby improving the working efficiency of the staff.

[0031] Refer to Figure 1 , Figure 2 and Figure 3 , a first material guiding shell 9 and a second material guiding shell 10 are fixedly installed in the inner cavity of the frame 2. The first material guiding shell 9 is arranged above the conveying mechanism 8, and the second material guiding shell 10 is arranged at the bottom of the positioning plate 3. The top of the second material guiding shell 10 is fixedly connected with the bottom of the positioning plate 3. By setting the first material guiding shell 9, when the drum screen 6 screens the sand and gravel, the small-particle sand and gravel fall into the first material guiding shell 9 through the apertures on the surface of the drum screen 6, which is convenient for the staff to convey the small-particle sand and gravel. And the large-particle sand and gravel cannot pass through the apertures on the surface of the drum screen 6 and are discharged, so they will roll along the inner cavity of the drum screen 6 and fall into the inner cavity of the second material guiding shell 10 and be discharged.

[0032] Refer to Figure 3 , an arc-shaped baffle 11 is fixedly connected to the inner cavity of the drum sieve 6. The number of arc-shaped baffles 11 is four, and the arc-shaped baffles 11 are arranged staggeredly. By arranging the arc-shaped baffles 11, it is possible to slow down the sand and gravel inside during the rotation of the drum sieve 6, avoiding the small particle sand and gravel following the large particle sand and gravel to be discharged when screening small particle sand and gravel, thus causing waste of raw materials.

[0033] Refer to Figure 4 , two cleaning brushes 710 are fixedly installed in the inner cavity of the fixing frame 701. The side of the cleaning brush 710 away from the inner wall of the fixing frame 701 is in contact with the surface of the drum sieve 6. By arranging the cleaning brushes 710, it is possible to clean the sand and gravel on the surface of the drum sieve 6 when the drum sieve 6 is working, thereby improving the maintenance efficiency of the staff.

[0034] Refer to Figure 4 , a support block 711 is fixedly connected to the top of the fixing frame 701. One side of the support block 711 is fixedly connected to the surface of the frame 2. By arranging the support block 711, it is possible to support and position the fixing frame 701, thereby improving the stability of the fixing frame 701 during use.

[0035] Refer to Figure 4 and Figure 5 , retention blocks 712 are provided at the four corners of the limit shell 702. The top of the retention block 712 is fixedly connected to the inner wall of the fixing frame 701, and the inner side of the retention block 712 is in contact with the surface of the limit shell 702. By arranging the retention blocks 712, it is possible to fix the limit shell 702 and prevent the limit shell 702 from falling off during use.

[0036] Refer to Figure 5 , a positioning ring 713 is fixedly sleeved on the surface of the second motor 703. One side of the positioning ring 713 is fixedly connected to the surface of the limit shell 702. By arranging the positioning ring 713, it is possible to position the second motor 703 and prevent the second motor 703 from falling off during use.

[0037] Working principle: During use, the staff starts the first motor 4 by using an external control switch. The output end of the first motor 4 drives the transmission rod 5 to rotate. When the transmission rod 5 rotates, it drives the drum screen 6 to rotate. Small particle sand and gravel will be discharged through the apertures on the surface of the drum screen 6, while large particle sand and gravel will move along the inner wall of the drum screen 6 and be discharged from one side of the drum screen 6. During the screening process, the staff starts the second motor 703 by using an external control switch. The output end of the second motor 703 drives the positioning rod 704 to rotate. When the positioning rod 704 rotates, it drives the cam 705 to rotate. When the cam 705 rotates vertically, it squeezes the fixed plate 707. After being squeezed, the fixed plate 707 stretches the tension spring 706 and drives the fixed rod 708 to move downward. When the fixed rod 708 moves downward, it drives the convex block 709 to move downward, causing the convex block 709 to strike the outer surface of the drum screen 6. When the cam 705 rotates horizontally, the reaction force of the tension spring 706 drives the fixed plate 707 and the fixed rod 708 to move upward, causing the convex block 709 to disengage from the surface of the drum screen 6. Under the repeated knocking of the convex block 709 in this way, the sand and gravel in the apertures of the drum screen 6 can automatically fall off, thereby improving the screening efficiency of the drum screen 6. At the same time, after the small particle sand and gravel are discharged through the apertures of the drum screen 6, they will fall onto the surface of the conveyor belt 803. At this time, the staff starts the third motor 801 by using an external control switch. The output end of the third motor 801 drives the transmission roller 802 to rotate. When the transmission roller 802 rotates, it drives the conveyor belt 803 to convey, so as to convey the screened sand and gravel, thereby improving the work efficiency of the staff.

[0038] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A sand screening machine for construction projects, characterized in that: It includes a base (1), a frame (2) is fixedly connected to the top of the base (1), a positioning plate (3) is fixedly connected to one side of the frame (2), a first motor (4) is fixedly installed on the top of the positioning plate (3), the output end of the first motor (4) is fixedly connected to a transmission rod (5), one end of the transmission rod (5) is rotatably connected to the surface of the frame (2) through a bearing, a drum screen (6) is fixedly sleeved on the surface of the transmission rod (5), the drum screen (6) is arranged in the inner cavity of the frame (2), a cleaning mechanism (7) is arranged on the surface of the frame (2), and a conveying mechanism (8) is arranged in the inner cavity of the base (1); The cleaning mechanism (7) includes a fixed frame (701), the fixed frame (701) is fixedly installed on the surface of the frame (2), a limiting shell (702) is fixedly installed in the inner cavity of the fixed frame (701), a second motor (703) is fixedly installed on one side of the limiting shell (702), the output end of the second motor (703) penetrates into the inner cavity of the limiting shell (702) and is fixedly connected to a positioning rod (704), one end of the positioning rod (704) is rotatably connected to the inner wall of the limiting shell (702), two cams (705) are fixedly sleeved on the surface of the positioning rod (704), four tension springs (706) are arranged in the inner cavity of the limiting shell (702), one end of the tension spring (706) is fixedly connected to the inner wall of the limiting shell (702), the other end of the tension spring (706) is fixedly connected to a fixing plate (707), the fixing plate (707) is arranged at the bottom of the cam (705), a fixing rod (708) is fixedly connected to the bottom of the fixing plate (707), a convex block (709) is fixedly sleeved on the surface of the fixing rod (708), and the convex block (709) is arranged at the upper end of the drum screen (6).

2. The sand screening machine for construction projects according to claim 1, characterized in that: The conveying mechanism (8) includes a third motor (801), the third motor (801) is fixedly installed on the surface of the base (1), the output end of the third motor (801) penetrates into the inner cavity of the base (1) and is fixedly connected to a transmission roller (802), one end of the transmission roller (802) is rotatably connected to the inner wall of the base (1) through a bearing, a conveyor belt (803) is movably sleeved on the surface of the transmission roller (802), auxiliary rollers (804) are arranged in the inner cavity of the conveyor belt (803), the number of the auxiliary rollers (804) is several, both ends of the auxiliary roller (804) are rotatably connected to the inner wall of the base (1), and the surface of the auxiliary roller (804) is in contact with the inner side of the conveyor belt (803).

3. A sand screening machine for construction engineering according to claim 1, characterized in that: A first material guiding shell (9) and a second material guiding shell (10) are fixedly installed in the inner cavity of the frame (2), the first material guiding shell (9) is arranged at the upper end of the conveying mechanism (8), the second material guiding shell (10) is arranged at the bottom of the positioning plate (3), and the top of the second material guiding shell (10) is fixedly connected to the bottom of the positioning plate (3).

4. A sand screening machine for construction projects according to claim 1, characterized in that: An arc-shaped stop bar (11) is fixedly connected to the inner cavity of the drum screen (6). The number of the arc-shaped stop bars (11) is four, and the arc-shaped stop bars (11) are arranged staggeredly.

5. A sand screening machine for construction projects according to claim 1, characterized in that: Two cleaning brushes (710) are fixedly installed in the inner cavity of the fixing frame (701). One side of the cleaning brush (710) away from the inner wall of the fixing frame (701) is in contact with the surface of the drum screen (6).

6. The sand screening machine for construction engineering according to claim 1, wherein: A support block (711) is fixedly connected to the top of the fixing frame (701). One side of the support block (711) is fixedly connected to the surface of the frame (2).

7. A sand screening machine for construction projects according to claim 1, characterized in that: Retention blocks (712) are arranged at the four corners of the limit shell (702). The top of the retention block (712) is fixedly connected to the inner wall of the fixing frame (701), and the inner side of the retention block (712) is in contact with the surface of the limit shell (702).

8. A sand screening machine for construction projects according to claim 1, characterized in that: A positioning ring (713) is fixedly sleeved on the surface of the second motor (703). One side of the positioning ring (713) is fixedly connected to the surface of the limit shell (702).

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