A screening device for concrete production

Abstract

The application discloses a screening device for concrete production and belongs to the technical field of concrete production equipment. The screening device comprises a screening box, a transmission assembly, a main vibration assembly and an auxiliary vibration assembly. The front end of the screening box is provided with a rectangular hole. A main sieve plate is hingedly connected in the screening box. The front end of the main sieve plate penetrates through the rectangular hole and extends out of the screening box. A main assembly plate is fixedly connected in the screening box. A plurality of main springs are fixedly connected to the main assembly plate. The other ends of the main springs are connected with the main sieve plate. The main vibration assembly is located below the main sieve plate. The screening device for concrete production realizes secondary screening of large-diameter raw materials through twice screening of the main sieve plate and the auxiliary sieve plate, effectively reduces the direct discharge of small-diameter particles entrained in the large-diameter raw materials, solves the problem that the screening precision of the existing screening device is reduced due to the inconvenience of secondary screening, and improves the screening precision of the concrete raw materials.

Description

Technical Field

[0001] This application relates to the field of concrete production equipment technology, specifically a screening device for concrete production. Background Technology

[0002] In the concrete production process, the screening of raw materials is a crucial step. Concrete is typically composed of a mixture of cement, sand, gravel, and other materials, and the particle size and uniformity of these raw materials directly affect the quality and performance of the concrete. If the raw materials contain excessively large particles or impurities, it can lead to problems such as insufficient concrete strength and reduced durability.

[0003] Existing screening devices for concrete production have limitations when screening raw materials. Large-diameter raw materials are mechanically tumbled, forming a dynamic material layer. Some smaller-diameter materials are trapped in the gaps between the larger particles due to friction and pressure, causing them to be carried out simultaneously with the larger-diameter materials as they exit the screen. This results in a decrease in screening accuracy. Therefore, a new screening device for concrete production needs to be designed to solve these problems.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0005] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a screening device for concrete production, which solves the problem that some existing concrete screening devices are inconvenient for secondary screening of large-diameter raw materials, resulting in small particles being carried out and the screening accuracy being reduced.

[0006] The technical solution adopted by this application to solve its technical problem is: a screening device for concrete production, including a screening box, a transmission assembly, a main vibration assembly and an auxiliary vibration assembly. The front end of the screening box is provided with a rectangular hole. A main screen plate is hinged inside the screening box. The front end of the main screen plate passes through the rectangular hole and extends to the outside of the screening box. A main assembly plate is fixed inside the screening box. A plurality of main springs are fixed on the main assembly plate. The other end of each main spring is connected to the main screen plate. The main vibration assembly is located below the main screen plate and is suitable for driving the main screen plate to vibrate.

[0007] The screening box is fixed with baffles on both sides. An auxiliary screen plate is hinged to the baffles and located below the main screen plate. A guide cover located below the auxiliary screen plate is fixed to the lower end of the baffles. The rear end of the guide cover is connected through the screening box. An auxiliary assembly plate is fixed on the guide cover. Multiple auxiliary springs are fixed on the auxiliary assembly plate. The other end of the auxiliary springs is connected to the auxiliary screen plate. An auxiliary vibration assembly is installed below the auxiliary screen plate and is adapted to drive the auxiliary screen plate to vibrate.

[0008] The main vibration component and the auxiliary vibration component generate vibration simultaneously through a transmission component located on one side of the screening box.

[0009] Furthermore, the main vibration assembly includes a servo motor, a main rotating rod, and a main cam. The servo motor is installed on the other side of the screening box, and the output end of the servo motor extends into the screening box and is connected to one end of the main rotating rod. A plurality of main cams are fixed at intervals on the main rotating rod, and a main vibration plate adapted to the plurality of main cams is fixed on the main screen plate.

[0010] The auxiliary vibration assembly includes an auxiliary rotating rod and auxiliary cams. The auxiliary rotating rod is located below the auxiliary screen plate and is rotatably connected to the baffle plate. A plurality of auxiliary cams are fixed at intervals on the auxiliary rotating rod. An auxiliary vibration plate adapted to the plurality of auxiliary cams is fixed on the auxiliary screen plate.

[0011] The transmission assembly includes a main gear, an auxiliary gear, and a toothed belt. The other end of the main rotating rod extends outside the screening box and is connected to the main gear. The other end of the auxiliary rotating rod extends outside the baffle and is connected to the auxiliary gear. The toothed belt is sleeved on the main gear and the auxiliary gear.

[0012] Furthermore, the main spring keeps the main screen plate moving downwards.

[0013] Furthermore, the auxiliary spring keeps the auxiliary sieve plate moving downwards.

[0014] Furthermore, the main sieve plate and the auxiliary sieve plate are provided with sieve holes of the same diameter.

[0015] Furthermore, a protective cover is fixed to the upper end of the main sieve plate.

[0016] Furthermore, a support is fixed on the screening box.

[0017] The beneficial effects of this application are as follows: The screening device for concrete production provided by this application realizes secondary screening of large-diameter raw materials through two screenings by the main screen plate and the auxiliary screen plate, effectively reducing the direct discharge of small-diameter particles entrained in the large-diameter raw materials, solving the problem of reduced screening accuracy caused by the inconvenience of secondary screening in existing screening devices, and improving the screening accuracy of concrete raw materials. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a first three-dimensional structural schematic diagram of a screening device for concrete production according to an embodiment of this application;

[0020] Figure 2 This is a second three-dimensional structural schematic diagram of a screening device for concrete production according to an embodiment of this application;

[0021] Figure 3 This is a three-dimensional structural diagram of the main vibration assembly and the main screen plate according to an embodiment of this application;

[0022] Figure 4 This is a cross-sectional view of a screening device for concrete production according to an embodiment of this application;

[0023] Figure 5 This is a partial cross-sectional view of a screening device for concrete production according to an embodiment of this application.

[0024] The following are the labeling elements in the figure:

[0025] 1. Screening box; 2. Support frame; 3. Rectangular hole; 4. Main screen plate; 5. Protective cover; 6. Main assembly plate; 7. Main spring; 8. Servo motor; 9. Main rotating rod; 10. Main cam; 11. Main vibrating plate; 12. Main gear; 13. Baffle; 14. Auxiliary screen plate; 15. Material guide cover; 16. Auxiliary assembly plate; 17. Auxiliary spring; 18. Auxiliary rotating rod; 19. Auxiliary gear; 20. Toothed belt; 21. Auxiliary cam; 22. Auxiliary vibrating plate. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] like Figures 1-5As shown, this application provides a screening device for concrete production, including a screening box 1, a transmission assembly, a main vibration assembly, and an auxiliary vibration assembly. The screening box 1 is welded from Q235 steel plate, with a fixed support 2 welded to the bottom. Self-locking casters are installed at the lower end of the support 2 to ensure flexible movement of the equipment. A rectangular hole 3 is opened at the front end of the screening box 1. A main screen plate 4 is connected inside the screening box 1 via a hinge shaft. The front end of the main screen plate 4 passes through the rectangular hole 3 and extends outside the screening box 1. A fixed protective cover 5 is welded above the main screen plate 4 to reduce material splashing during the screening process.

[0029] The main assembly plate 6 is welded and fixed inside the screening box 1. Multiple main springs 7 are welded and fixed to the plate. The springs are φ20mm×300mm in size, with a free length of 350mm and an elastic coefficient of 50N / mm. Their upper ends are welded and fixed to the main screen plate 4, maintaining the main screen plate 4 in a downward movement trend. The main vibration assembly includes a servo motor 8, a main rotating rod 9, and a main cam 10. The servo motor 8 has a power of 2.2kW and a speed of 1440r / min. It is connected to the main rotating rod 9 via a coupling. Three main cams 10 are welded and fixed to the main rotating rod 9. 0. A main vibrating plate 11 is welded and fixed below the main screen plate 4. The contact surface between the main vibrating plate 11 and the main cam 10 is made of polyurethane buffer layer to reduce impact noise. Specifically, the servo motor 8 drives the main rotating rod 9 to rotate, and the main cam 10 on the main rotating rod 9 rotates accordingly. The main cam 10 periodically pushes the main vibrating plate 11 below the main screen plate 4, causing the main screen plate 4 to vibrate up and down. At the same time, the main spring 7 always applies a downward pulling force to the main screen plate 4, which forms a reciprocating vibration with the pushing action of the main cam 10, accelerating the screening process of raw materials.

[0030] Baffles 13 are welded to both sides of the screening box 1. An auxiliary screen plate 14 is hinged to the baffles 13. Both the auxiliary screen plate 14 and the main screen plate 4 are made of 304 stainless steel perforated plate. A guide cover 15 is fixed to the lower end of the baffles 13. The guide cover 15 is inclined towards the screening box 1 and its rear end is connected to the screening box 1. An auxiliary assembly plate 16 is welded to the upper part of the front outer wall of the guide cover 15. Multiple auxiliary springs 17 with the same specifications as the main springs 7 are welded to the auxiliary assembly plate 16 to keep the auxiliary screen plate 14 moving downward. The screening aperture of the auxiliary screen plate 14 is the same as that of the main screen plate 4, which can perform secondary screening of large-particle raw materials.

[0031] The transmission assembly includes a main gear 12, an auxiliary gear 19, and a toothed belt 20. The main gear 12 is connected to the main rotating rod 9 by a key, and the auxiliary gear 19 is connected to the auxiliary rotating rod 18 by a key. The toothed belt 20 is sleeved on the main gear 12 and the auxiliary gear 19 and is used to transmit the rotational power of the main rotating rod 9 to the auxiliary rotating rod 18. The auxiliary rotating rod 18 of the auxiliary vibration assembly is fixed to the baffle 13 by a bearing seat. Three auxiliary cams 21 are welded and fixed on the rod. An auxiliary vibration plate 22 is welded and fixed below the auxiliary screen plate 14. The structure is the same as that of the main vibration plate 11. Specifically, the main rotating rod 9 drives the auxiliary rotating rod 18 to rotate synchronously through the transmission structure of the main gear 12, the toothed belt 20, and the auxiliary gear 19. The auxiliary cams 21 on the auxiliary rotating rod 18 periodically push the auxiliary vibration plate 22, so that the auxiliary screen plate 14 vibrates under the elastic restoring action of the auxiliary spring 17.

[0032] Working principle: First, concrete raw materials such as gravel and sand are poured in from the opening above the screening box 1. When pouring, it is necessary to pour in along the end of the main screen plate 4 away from the rectangular hole 3 to ensure that the raw materials have a sufficiently long screening path on the main screen plate 4.

[0033] At this time, the servo motor 8 is connected to an external power supply, and the servo motor 8 is started by the control button. The servo motor 8 drives the main rotating rod 9 to rotate, and the main cam 10 fixed on the main rotating rod 9 rotates accordingly. The main cam 10 periodically pushes the main vibrating plate 11 below the main screen plate 4, causing the main screen plate 4 to vibrate up and down. At the same time, the main spring 7 always applies a downward pulling force to the main screen plate 4, which forms a reciprocating vibration with the pushing action of the main cam 10, accelerating the screening process of raw materials.

[0034] During the process of screening concrete raw materials on the main screen plate 4, large-diameter raw materials will roll along the surface of the main screen plate 4 toward the rectangular hole 3, and finally fall from the front end of the main screen plate 4 onto the auxiliary screen plate 14 below. The auxiliary screen plate 14 is hinged to the baffle 13 and the screening hole diameter is the same as that of the main screen plate 4, which can perform secondary screening of large-diameter raw materials. At this time, the main rotating rod 9 drives the auxiliary rotating rod 18 to rotate synchronously through the transmission structure of the main gear 12, the toothed belt 20 and the auxiliary gear 19. The auxiliary cam 21 on the auxiliary rotating rod 18 periodically pushes the auxiliary vibrating plate 22, so that the auxiliary screen plate 14 vibrates under the elastic reset action of the auxiliary spring 17.

[0035] When the large-diameter raw material vibrates on the auxiliary screen plate 14, some of the remaining small-diameter particles will fall into the guide cover 15 through the screen holes and slide into the interior of the screening box 1 via the guide cover 15 which is inclined towards the screening box 1. The large-diameter raw material after secondary screening is discharged from the front end of the auxiliary screen plate 14, which reduces the problem of small-particle raw material entrainment caused by the lack of secondary screening in traditional screening.

[0036] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A screening device for concrete production, comprising a screening box (1), a transmission assembly, a main vibration assembly, and an auxiliary vibration assembly, characterized in that: The screening box (1) has a rectangular hole (3) at its front end. A main screen plate (4) is hinged inside the screening box (1). The front end of the main screen plate (4) passes through the rectangular hole (3) and extends to the outside of the screening box (1). A main assembly plate (6) is fixed inside the screening box (1). Multiple main springs (7) are fixed on the main assembly plate (6). The other end of each main spring (7) is connected to the main screen plate (4). The main vibration component is located below the main screen plate (4) and is suitable for driving the main screen plate (4) to vibrate. The screening box (1) is fixed with baffles (13) on both sides. An auxiliary screen plate (14) located below the main screen plate (4) is hinged on the baffles (13). A guide cover (15) located below the auxiliary screen plate (14) is fixed at the lower end of the baffles (13). The rear end of the guide cover (15) is connected to the screening box (1). An auxiliary assembly plate (16) is fixed on the guide cover (15). A plurality of auxiliary springs (17) are fixed on the auxiliary assembly plate (16). The other end of the auxiliary springs (17) is connected to the auxiliary screen plate (14). The auxiliary vibration assembly is installed below the auxiliary screen plate (14) and is suitable for driving the auxiliary screen plate (14) to vibrate. The main vibration component and the auxiliary vibration component simultaneously generate vibration through a transmission component located on one side of the screening box (1).

2. The screening device for concrete production according to claim 1, characterized in that: The main vibration assembly includes a servo motor (8), a main rotating rod (9), and a main cam (10). The servo motor (8) is installed on the other side of the screening box (1). The output end of the servo motor (8) extends into the screening box (1) and is connected to one end of the main rotating rod (9). Multiple main cams (10) are fixed at intervals on the main rotating rod (9). A main vibration plate (11) adapted to the multiple main cams (10) is fixed on the main screen plate (4). The auxiliary vibration assembly includes an auxiliary rotating rod (18) and an auxiliary cam (21). The auxiliary rotating rod (18) is located below the auxiliary screen plate (14) and is rotatably connected to the baffle (13). A plurality of auxiliary cams (21) are fixed at intervals on the auxiliary rotating rod (18). An auxiliary vibration plate (22) adapted to the plurality of auxiliary cams (21) is fixed on the auxiliary screen plate (14). The transmission assembly includes a main gear (12), an auxiliary gear (19), and a toothed belt (20). The other end of the main rotating rod (9) extends to the outside of the screening box (1) and is connected to the main gear (12). The other end of the auxiliary rotating rod (18) extends to the outside of the baffle (13) and is connected to the auxiliary gear (19). The toothed belt (20) is sleeved on the main gear (12) and the auxiliary gear (19).

3. A screening device for concrete production according to claim 1, characterized in that: The main spring (7) keeps the main screen plate (4) moving downward.

4. A screening device for concrete production according to claim 1, characterized in that: The auxiliary spring (17) keeps the auxiliary sieve plate (14) moving downward.

5. A screening device for concrete production according to claim 1, characterized in that: The main sieve plate (4) and the auxiliary sieve plate (14) are provided with sieve holes of the same diameter.

6. A screening device for concrete production according to claim 1, characterized in that: The upper end of the main sieve plate (4) is fixed with a protective cover (5).

7. A screening device for concrete production according to claim 1, characterized in that: A bracket (2) is fixed on the screening box (1).

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