Multistage screening type concrete shoveling and screening device

Abstract

The utility model discloses a multi-stage screening type concrete shoveling and screening device which comprises a screening mechanism, a concrete shoveling and screening mechanism and a concrete shoveling and screening mechanism, the screening mechanism is provided with a plurality of screens which are arranged at intervals from top to bottom, meshes of the screens become smaller step by step, and the screens are used for screening aggregate step by step; the screening mechanism is arranged on the vibrating mechanism and is used for driving the screening mechanism to vibrate; and an unblocking mechanism. Aggregate is placed on the topmost screen, the vibrating mechanism can drive the screening mechanism to vibrate so as to drive the screen to vibrate, and the aggregate is screened step by step from large to small. During screening, the rotating shaft moves downwards through the driving assembly to drive the scraper to move downwards to be separated from the bottom of the screen, and therefore falling of aggregate cannot be affected by the scraper; when the screen is blocked, the rotating shaft is driven by the driving assembly to move upwards so that the scraping plate can be tightly attached to the bottom of the screen, then the rotating shaft is driven by the driving assembly to rotate so that the scraping plate can be driven to scrape aggregate blocked on the screen, manual operation is not needed, and the convenience of unblocking of the screen is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of aggregate screening technology, and more specifically, to a multi-stage screening concrete sieving device. Background Technology

[0002] Concrete sieves are primarily used in testing to analyze the particle size distribution of aggregates (such as sand and stone) to ensure they meet engineering design requirements. This analysis is crucial for guaranteeing concrete quality because the aggregate particle size distribution directly affects the workability and strength of the concrete.

[0003] Existing inspection screens mainly consist of multi-layer screen assemblies and a vibrating device. The screen assembly needs to screen the aggregate step by step from top to bottom, which makes the screen easy to clog. After clogging, the screen needs to be removed for cleaning or a needle needs to be manually inserted to clear the screen, which is quite troublesome. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a multi-stage screening concrete scraping device that can automatically scrape away aggregate clogging the screen.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A multi-stage concrete screening device includes:

[0007] The screening mechanism has a plurality of screens arranged at intervals from top to bottom, with the mesh size decreasing at each stage, and the plurality of screens are used to screen aggregates in stages.

[0008] A vibration mechanism, wherein the screening mechanism is mounted on the vibration mechanism, for driving the screening mechanism to vibrate; and

[0009] The unblocking mechanism includes a rotating shaft that can be lifted and passed through a plurality of the screens, and a scraper located below each of the screens is provided on the rotating shaft; it also includes a drive component with its output end connected to the rotating shaft for driving the rotating shaft to lift and rotate.

[0010] The drive assembly can drive the rotating shaft to move the scraper downward to separate it from the bottom of the screen, and drive the scraper upward to be in close contact with the bottom of the screen.

[0011] Preferably, the screening mechanism further includes several vertically stacked screen bins, with each of the screens being individually arranged within one of the screen bins.

[0012] Preferably, the side wall of the screening chamber is provided with an openable discharge port.

[0013] Preferably, the multi-stage screening concrete sieve device further includes a support mounted on the vibration mechanism, and a pressing member mounted on the support for pressing down the sieve chamber.

[0014] Preferably, the support consists of several support rods arranged around the screen chamber, the pressure member is movably sleeved on the support rods, and the support rods are also fitted with fastening rings located above and below the pressure member, the fastening rings being used to limit the position of the pressure member.

[0015] Preferably, the screening mechanism further includes a storage bin at the bottom, with all screening bins disposed on the storage bin, which is used to receive the aggregate screened out by the bottom screen.

[0016] Preferably, the bottom of the rotating shaft extends into the storage compartment and is provided with a locking head; the drive assembly includes:

[0017] The sleeve has a positioning hole at its top that fits into the clip head, and the clip head can move up and down in the positioning hole without relative rotation.

[0018] An elastic element is disposed between the positioning hole and the clamp head, which is used to push the clamp head up and thereby drive the rotating shaft to move upward so that the scraper is attached to the bottom surface of the screen.

[0019] A rotary drive is located inside the storage chamber. The output end of the rotary drive is connected to the sleeve head to drive the rotating shaft to rotate, thereby driving the scraper to scrape off the aggregate blocked on the screen.

[0020] Preferably, the bracket has a fixing member at the top; the drive assembly further includes a telescopic driver disposed on the fixing member and with its output end facing downwards and corresponding to the top of the rotating shaft, the telescopic driver pressing down to push the rotating shaft downwards and thereby causing the scraper to separate from the screen.

[0021] Preferably, a bushing is provided at the center of the screen, and the rotating shaft is movably inserted through the bushing.

[0022] Preferably, the vibration mechanism includes a vibration base and a vibration motor with its power output end connected to the base; the screening mechanism is disposed on the base.

[0023] Compared with the prior art, the advantages of this utility model are as follows:

[0024] Aggregates are placed on the top screen, and a vibration mechanism drives the screening mechanism to vibrate, which in turn vibrates the screen, thus screening the aggregates from largest to smallest. During screening, a drive assembly moves the rotating shaft downwards, causing the scraper to move downwards and separate from the bottom of the screen. This way, the scraper does not affect the falling aggregates. When the screen becomes clogged, the drive assembly moves the rotating shaft upwards to press the scraper against the bottom of the screen. Then, the drive assembly rotates the rotating shaft to scrape away the clogged aggregates from the screen. No manual operation is required, greatly improving the convenience of unclogging the screen. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a partial cross-sectional view of the present invention;

[0027] Figure 3 for Figure 2 Enlarged view of point A;

[0028] Figure 4 for Figure 3 A schematic diagram of another state.

[0029] Explanation of the labels in the diagram:

[0030] 1. Screening mechanism; 11. Screen; 12. Screen bin; 121. Discharge port; 13. Storage bin; 14. Bushing; 2. Vibration mechanism; 21. Vibration base; 22. Vibration motor; 3. Unblocking mechanism; 31. Rotating shaft; 311. Clamping head; 32. Scraper; 33. Drive assembly; 331. Sleeve head; 3311. Positioning hole; 332. Elastic element; 333. Rotary drive; 334. Telescopic drive; 4. Bracket; 41. Support rod; 42. Fixing element; 5. Pressing element; 51. Fastening ring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] refer to Figure 1-2A multi-stage concrete screening device includes: a screening mechanism 1, a vibration mechanism 2, and a blocking mechanism 3. The screening mechanism 1 has several screens 11 arranged at intervals from top to bottom, with progressively smaller mesh sizes, for screening aggregates in stages. The screening mechanism 1 is mounted on the vibration mechanism 2 to drive the screening mechanism 1 to vibrate. The blocking mechanism 3 includes a rotating shaft 31 that can be raised and lowered through the several screens 11, with a scraper 32 located below each screen 11 on the rotating shaft 31. It also includes a drive assembly 33 with its output end connected to the rotating shaft 31 for driving the rotating shaft 31 to rise, fall, and rotate. The drive assembly 33 can drive the rotating shaft 31, thereby causing the scraper 32 to move down to separate from the bottom of the screen 11, and to move the scraper 32 up to be in close contact with the bottom of the screen 11.

[0033] Understandably, the screen 11 is a component with several mesh openings for screening aggregates, such as a stainless steel screen 11 or a plastic screen 11. The vibration mechanism 2 is a component that can drive the screening mechanism 1 to vibrate, thereby driving the screen 11 to vibrate, such as an eccentric block vibrator or an electromagnetic vibrator, but not limited to these. The lifting and lowering of the rotating shaft 31 can be achieved by opening a through hole in the screen 11, or by opening a through hole in the screen 11 and simultaneously installing a bushing 14, allowing the rotating shaft 31 to be inserted into the through hole for lifting, lowering, and rotation. The scraper 32 is a component that can scrape away aggregates that are blocked by the screen 11, such as a flat plate structure or a strip structure with a triangular cross-section, but not limited to these. The drive assembly 33 can both drive the rotating shaft 31 to rise and fall, and also drive the rotating shaft 31 to rotate. Therefore, the drive assembly 33 can be a combination structure of rotary driver 333 and lifting driver. The rotary driver 333 can be set at the output end of the lifting driver, and the rotating shaft 31 can be connected to the output end of the rotary driver 333; or the rotary driver 333 and the lifting driver can be set separately at both ends of the rotating shaft 31.

[0034] With this setup, the aggregate is placed on the top screen 11. The vibration mechanism 2 drives the screening mechanism 1 to vibrate, which in turn drives the screen 11 to vibrate, thus achieving step-by-step screening of the aggregate from large to small. During screening, the drive assembly 33 moves the rotating shaft 31 downward, causing the scraper 32 to move downward and separate from the bottom of the screen 11. In this way, the scraper 32 will not affect the falling of the aggregate. When the screen 11 is clogged, the drive assembly 33 moves the rotating shaft 31 upward to press the scraper 32 against the bottom of the screen 11. Then, the drive assembly 33 drives the rotating shaft 31 to rotate, causing the scraper 32 to scrape away the clogged aggregate on the screen 11. No manual operation is required, which greatly improves the convenience of unclogging the screen 11.

[0035] In some embodiments, the screening mechanism 1 further includes a plurality of vertically stacked screen bins 12, with a plurality of screens 11 respectively disposed within each of the screen bins 12. Here, the screen bin 12 is a component used to install the screens 11, forming a closed internal structure. For example, it can be a cylindrical structure or a square barrel structure, but is not limited thereto. The screen bins 12 on each screen 11 can be independently disposed, that is, multiple screen bins 12 can be stacked by means of threaded connection or sleeve connection, or multiple screen bins 12 can be an integral structure. In this way, the screen bins 12, together with the screens 11, form several separated cavities inside, and the aggregate is screened step by step and enters each cavity.

[0036] In some embodiments, a switchable discharge port 121 is provided on the side wall of the screening bin 12. Here, the discharge port 121 is a structure that can discharge the aggregate in the screening bin 12. For example, it can be a combination of an open structure or a guide groove structure with an embedded plug or a pull-out switch, but is not limited to these. In this way, after the aggregate is screened, it is not necessary to disassemble each screening bin 12; it can be discharged directly through the discharge port 121, improving the convenience of aggregate discharge.

[0037] In some embodiments, the multi-stage sieving concrete sieve device further includes a support 4 mounted on the vibration mechanism 2, and a pressing member 5 mounted on the support 4 to press down the screen chamber 12. Here, the support 4 is a component that supports and mounts the pressing member 5; for example, it can be a structure composed of multiple support rods 41, or a structure of a single plate, etc., but is not limited thereto. The pressing member 5 is a component that presses down the screen chamber 12; for example, it can be a self-weight pressing block structure, or a locking structure such as a screw to press down and lock the screen chamber 12, but is not limited thereto. Thus, the pressing member 5 can stabilize the screen chamber 12 and prevent it from vibrating and scattering.

[0038] Optionally, in some embodiments, the support 4 consists of several support rods 41 arranged around the screen chamber 12. The pressure member 5 is movably sleeved on the support rods 41, and a fastening ring 51 located above and below the pressure member 5 is also sleeved on the support rods 41. The fastening ring 51 is used to limit the position of the pressure member 5. It is understood that the fastening ring 51 can be threaded to the support rods 41, or it can be a rubber sleeve with elastic function, but is not limited to these. In this way, the height position of the pressure member 5 can be limited by moving the fastening ring 51 up and down, which is relatively convenient to operate.

[0039] In some embodiments, the screening mechanism 1 further includes a storage bin 13 at the bottom, with all screening bins 12 disposed on the storage bin 13. The storage bin 13 is used to receive the aggregate screened out by the bottom screen 11. It is understood that since the bottom of the screening mechanism 1 does not need to screen aggregate, the storage bin 13 is provided to receive and store the last screened aggregate.

[0040] Optionally, in some embodiments, reference is made to Figure 3-4 The bottom of the rotating shaft 31 extends into the storage chamber 13 and is provided with a clamping head 311. The drive assembly 33 includes a sleeve head 331, an elastic element 332, and a rotary driver 333. The top of the sleeve head 331 has a positioning hole 3311 that fits into the clamping head 311. The clamping head 311 can move up and down in the positioning hole 3311 without relative rotation. The elastic element 332 is provided between the positioning hole 3311 and the clamping head 311 and is used to push the clamping head 311 upward, thereby driving the rotating shaft 31 to move upward and drive the scraper 32 to stick to the bottom surface of the screen 11. The rotary driver 333 is provided in the storage chamber 13 and the output end of the rotary driver 333 is connected to the sleeve head 331 to drive the rotating shaft 31 to rotate, thereby driving the scraper 32 to scrape off the aggregate blocked on the screen 11.

[0041] Understandably, the shapes of the chuck head 311 and the positioning hole 3311 are fitted together, and they will not rotate relative to each other after fitting. For example, their cross-sections can be triangular, quadrilateral, pentagonal, etc., but are not limited to these. The depth of the positioning hole 3311 is greater than the thickness of the chuck head 311 to ensure that the chuck head 311 can move up and down within the positioning hole 3311. The elastic element 332 can be a metal spring, rubber, gas spring, etc., but is not limited to these. The rotary drive element can be a servo motor or a stepper motor, etc.

[0042] With this setup, under natural conditions, the spring will lift the rotating shaft 31 and elastically press the scraper 32 against the bottom of the screen 11. Thus, when the rotary driver 333 drives the rotating shaft 31 to rotate the scraper 32, the scraper 32 will be more closely attached to the screen 11, resulting in a better scraping effect.

[0043] In some embodiments, reference Figure 1-2 and Figure 4 The bracket 4 has a fixing member 42 at the top; the drive assembly 33 also includes a telescopic driver 334 disposed on the fixing member 42 and with its output end facing downward and corresponding to the top of the rotating shaft 31. The telescopic driver 334 presses down to push the rotating shaft 31 downward, thereby causing the scraper 32 to separate from the screen 11.

[0044] Understandably, the fastener 42 is a component used to mount the telescopic actuator 334. It can be integrally mounted on the bracket 4, or it can be detachably mounted on the bracket 4 using nuts or the like. The telescopic actuator 334 can be an electric actuator or a cylinder, but is not limited to these.

[0045] With this configuration, when the screen 11 is not blocked, the telescopic driver 334 presses down to push the rotating shaft 31, causing the scraper 32 to move downward and separate from the bottom of the screen 11. In this way, the scraper 32 will not obstruct the screen 11, ensuring that the aggregate is smoothly screened out of the screen 11.

[0046] In some embodiments, reference Figure 2-3 A bushing 14 is centrally located on the screen 11, and the rotating shaft 31 is movably inserted through the bushing 14. This bushing 14 enhances the stability of the engagement with the rotating shaft 31. The central location of the bushing 14 also allows the rotating shaft 31 to be positioned in the center, resulting in a wider coverage area for the scraper 32.

[0047] In some embodiments, reference Figure 1 The vibration mechanism 2 includes a vibration base 21 and a vibration motor 22 with its power output end connected to the base; the screening mechanism 1 is mounted on the vibration base 21. Thus, the vibration motor 22 drives the vibration base 21 to vibrate, which in turn drives the screening mechanism 1 to vibrate. The vibration base 21 can be a flat-top structure to support and mount the screening mechanism 1.

[0048] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A multi-stage sifting concrete screening device, characterized in that, The application relates to a multi-stage screening type concrete screening device. The device comprises a screening mechanism (1) with a plurality of screening meshes (11) arranged in a top-to-bottom manner and having mesh sizes gradually decreasing, the screening meshes (11) being used for gradually screening aggregate; a vibrating mechanism (2) on which the screening mechanism (1) is arranged and used for driving the screening mechanism (1) to vibrate; and a clogging removing mechanism (3) comprising a rotating shaft (31) which can be lifted and arranged through the screening meshes (11), the rotating shaft (31) being provided with a plurality of scrapers (32) arranged below each screening mesh (11); and a driving assembly (33) connected to the rotating shaft (31) and used for driving the rotating shaft (31) to lift and rotate. The driving assembly (33) can drive the rotating shaft (31) to further drive the scrapers (32) to move downwards and separate from the bottom of the screening meshes (11), and drive the scrapers (32) to move upwards and tightly contact the bottom of the screening meshes (11). The screening mechanism (1) further comprises a plurality of vertically stacked screening bins (12), and the screening meshes (11) are arranged in the screening bins (12) one by one. The side wall of the screening bin (12) is provided with an openable and closable discharging port (121).

2. The multi-stage sizing concrete screed apparatus of claim 1, wherein, The multi-stage screening type concrete screening device further comprises a support (4) arranged on the vibrating mechanism (2) and a pressing piece (5) arranged on the support (4) and used for pressing the screening bin (12).

3. The multi-stage sizing concrete screed apparatus of claim 2, wherein, The support (4) is a plurality of supporting rods (41) arranged around the screening bin (12), the pressing piece (5) is movably sleeved on the supporting rod (41), and a fastening ring (51) is further sleeved on the supporting rod (41) and located below and above the pressing piece (5), the fastening ring (51) is used for limiting the pressing piece (5).

4. The multi-stage sizing concrete screed apparatus of claim 3, wherein, The screening mechanism (1) further comprises a storage bin (13) arranged at the bottom, and all the screening bins (12) are arranged on the storage bin (13), the storage bin (13) is used for receiving aggregate screened by the bottommost screening mesh (11).

5. The multi-stage sizing concrete screed apparatus of claim 4, wherein, The bottom of the rotating shaft (31) extends into the storage bin (13) and is provided with a clamping head (311), the driving assembly (33) comprises a sleeve head (331) provided with a positioning hole (3311) at the top and matched with the clamping head (311), the clamping head (311) can move up and down in the positioning hole (3311) without relative rotation, an elastic member (332) is arranged between the positioning hole (3311) and the clamping head (311) and used for lifting the clamping head (311) to drive the rotating shaft (31) to move upwards and drive the scraper (32) to tightly contact the bottom surface of the screening mesh (11), and a rotary driver (333) is arranged in the storage bin (13) and connected to the sleeve head (331) and used for driving the rotating shaft (31) to rotate and further drive the scraper (32) to scrape off the clogging aggregate on the screening mesh (11).

6. The multi-stage sizing concrete screed apparatus of claim 4, wherein, ​ 7. The multi-stage sizing concrete screed apparatus of claim 6, wherein, ​ ​ ​ ​ 8. The multi-stage sizing concrete screed apparatus of claim 7, wherein, The support (4) has a fixing part (42) on the top; the driving assembly (33) further comprises a telescopic driver (334) arranged on the fixing part (42) and having an output end downwardly facing the top of the rotating shaft (31), the telescopic driver (334) pushes the rotating shaft (31) downward to move downward, thereby separating the scraper (32) from the screen (11).

9. The multi-stage sizing concrete screed apparatus of claim 8, wherein, The screen (11) is provided with a shaft sleeve (14) in the center, and the rotating shaft (31) is movably arranged in the shaft sleeve (14).

10. The multi-stage sizing concrete screed apparatus of claim 1, wherein, The vibrating mechanism (2) comprises a vibrating base (21) and a vibrating motor (22) connected to the vibrating base (21) through a power output end; the screening mechanism (1) is arranged on the vibrating base (21).

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