Screening device for civil engineering fine aggregate screening test
By designing an automated screening device for fine aggregate screening tests in civil engineering, the problems of uneven manual screening and time-consuming and labor-consuming in the prior art are solved, and the screening process is automated, and the accuracy and efficiency of the test are improved.
Patent Information
- Application Number
- CN202422080282.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The prior art lacks automation equipment in the fine aggregate screening test of civil engineering, resulting in uneven manual screening, time-consuming and labor-consuming, and testing errors.
An automated screening device for fine aggregate screening tests in civil engineering is designed, including a controller, a base, a mobile platform, a box bracket, aggregation box, aliquot unit, an electronic scale, a screening unit and a gantry, which automates the screening process through motor drive and automated control.
The screening process is automated, which reduces the inconsistency and time-consuming of manual operations, and improves the accuracy and efficiency of the test.
Smart Images
Figure CN223027815U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fine aggregate screening test equipment, and particularly relates to a screening device for fine aggregate screening test in civil engineering. Background Technique
[0002] The test steps of the dry sieving method are as follows: accurately weigh about 500 g of the dried sample, accurate to 0.5 g, and place it on the top sieve of the set of sieves, that is, the 4.75 mm sieve. Put the set of sieves into the sieve shaker and shake for about 10 minutes. Then take out the set of sieves, and in the order of sieve hole size, starting from the largest sieve number, perform manual sieving one by one on a clean shallow dish until the amount of sieved material per minute does not exceed 0.1% of the remaining amount on the sieve. Incorporate the particles that have passed through the sieve into the next sieve number and sieve them together with the sample in the next sieve number. Proceed in this order until all the sieves of each number are completely sieved.
[0003] During the process of the above test, for the sieving process, general laboratories are only equipped with standard sets of sieves, sieve shakers, shallow dishes and electronic scales. The sieving after shaking on the sieve shaker for 10 minutes is all carried out by manual sieving and setting a stopwatch for timing. Such an operation method has the following defects:
[0004] 1. The shaking force of each operator in each screening stage is different. The theoretical 1 minute may be quite different from the actual manual sieving time. For operators with less strength, they may need to sieve a certain standard sieve three or five times.
[0005] 2. Manually setting the stopwatch or reading the watch, manually weighing, counting and calculating are time-consuming and laborious. Content of the Utility Model
[0006] For the 1-minute manual sieving step after shaking on the sieve shaker for 10 minutes as described above, there is currently no automated screening equipment. In order to pursue high convenience, reduce test errors and avoid human interference factors, the inventor provides a screening device for fine aggregate screening test in civil engineering.
[0007] To solve the above technical problems, the technical solution of the utility model is as follows:
[0008] A screening device for the fine aggregate screening test in civil engineering, comprising a controller, a base, a moving platform, a material box bracket, an aggregate box, a lifting unit, an electronic scale, a screening unit and a gantry; the moving platform and the base form a linear moving pair, the linear movement of the moving platform is driven by a motor X, and the left limit and right limit of the moving platform are respectively controlled by proximity switches; the material box bracket and the lifting unit are arranged in the left-right direction and are both fixedly connected to the moving platform, the aggregate box is placed on the material box bracket, and the electronic scale is fixedly connected to the lifting end of the lifting unit; the gantry is fixedly connected to the base, the screening unit is arranged at the top of the gantry, and the screening unit is located above the aggregate box and the electronic scale; the screening unit includes a sieve base for placing standard sieves, and the reciprocating movement of the sieve base is driven by a motor Y; when the moving platform is at the right limit, the aggregate box is located below the sieve base; when the moving platform is at the left limit, the electronic scale is located below the sieve base.
[0009] Further, the screening unit further includes a crank-rocker mechanism and an elastic reset mechanism. The motor Y is fixedly connected to a motor bracket, and the motor bracket is fixedly connected to the gantry; the crank-rocker mechanism includes a crank and a rocker. One end of the crank is fixedly connected to the output shaft of the motor Y, the other end of the crank is hinged to the first end of the rocker, and the second end of the rocker is hinged to the sieve base; a slider Y is fixedly connected to the bottom of the sieve base, and the slider Y is slidably connected to a linear guide rail Y, and the linear guide rail Y is fixedly connected to the gantry; the elastic reset mechanism includes a tension spring, and both ends of the tension spring are respectively fixedly connected to the sieve base and a tension spring seat, and the tension spring seat is fixedly connected to the gantry.
[0010] Further, a plurality of rollers are provided on the inner wall of the sieve base for contacting the outer wall of the standard sieve. The plurality of rollers are arranged in a circumferential uniform distribution, and the rotation axis of the rollers is horizontal.
[0011] Further, the rollers are polyurethane-coated bearing rollers.
[0012] Further, the aggregate box includes a first inclined plate and a second inclined plate symmetrically arranged, and the included angle between the first inclined plate and the second inclined plate is β, and β ≤ 150°.
[0013] Further, the aggregate box includes a fixed baffle and a movable baffle. The fixed baffle is fixedly connected to the first ends of the first inclined plate and the second inclined plate, and the movable baffle is rotatably connected to the second ends of the first inclined plate and the second inclined plate.
[0014] Further, a flanging is provided at the upper end of the aggregate box, and a plurality of balls are provided on the top of the material box bracket for supporting the flanging of the aggregate box; a limit baffle is also provided on the top of the material box bracket.
[0015] Furthermore, the lifting unit includes a bottom support, a screw jack, a lifting platform, a guide rod, and a guide tube. The bottom support is fixedly connected to the moving platform. The fixed end of the screw jack and the guide tube are both fixedly connected to the bottom support. The lifting end of the screw jack is fixedly connected to the lifting platform. The guide rod is fixedly connected to the lifting platform and is slidably connected to the guide tube. The electronic scale is fixedly connected to the lifting platform.
[0016] The beneficial effects that the present utility model can achieve are as follows: By replacing manual hand screening with a screening unit, it saves labor and has a uniform force; the combined use of the moving platform, the material box bracket, and the lifting unit realizes automatic weighing and intelligent calculation, and the degree of automation is improved. Description of the Drawings
[0017] Figure 1 is a perspective view of an embodiment of the present utility model.
[0018] Figure 2 is a perspective view of the base, the gantry, and the screening unit in an embodiment of the present utility model.
[0019] Figure 3 is Figure 2 an enlarged view of part A in
[0020] Figure 4 is a perspective view of the moving platform, the material box bracket, and the lifting unit in an embodiment of the present utility model.
[0021] Figure 5 is a perspective view of the aggregate box in an embodiment of the present utility model (state one).
[0022] Figure 6 is a front view of the aggregate box in an embodiment of the present utility model (state one).
[0023] Figure 7 is a perspective view of the aggregate box in an embodiment of the present utility model (state two).
[0024] Figure 8 is a front view of an embodiment of the present utility model.
[0025] Figure 9 is a top view of an embodiment of the present utility model.
[0026] Figure 10 is a left view of an embodiment of the present utility model.
[0027] Figure 11 is a right view of an embodiment of the present utility model.
[0028] Figure 12 is a schematic diagram of the first use state of an embodiment of the present utility model.
[0029] Figure 13Schematic diagram of the second usage state of the embodiment of the present utility model.
[0030] Figure 14 Schematic diagram of the third usage state of the embodiment of the present utility model.
[0031] In the figure: 1 - base, 101 - linear guide rail X, 102 - rack, 2 - moving platform, 201 - slider X, 202 - gear, 203 - motor X, 3 - aggregate box, 301 - first inclined plate, 302 - second inclined plate, 303 - flanging, 304 - fixed baffle, 305 - movable baffle, 4 - material box bracket, 401 - ball, 402 - limit baffle, 5 - lifting unit, 501 - bottom support, 502 - screw jack, 503 - lifting platform, 504 - guide rod, 505 - guide tube, 6 - electronic scale, 7 - screening unit, 701 - motor bracket, 702 - motor Y, 703 - crank, 704 - rocker, 705 - sieve base, 706 - tension spring, 707 - tension spring seat, 708 - slider Y, 709 - roller, 710 - roller mounting seat, 8 - gantry, 801 - linear guide rail Y, 9 - standard sieve. Detailed implementation manners
[0032] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.
[0033] A screening device for fine aggregate screening tests in civil engineering includes a controller, a base 1, a moving platform 2, a material box bracket 4, an aggregate box 3, a lifting unit 5, an electronic scale 6, a screening unit 7 and a gantry 8.
[0034] The base 1 is used to carry the entire device and place it horizontally on the test bench.
[0035] The moving platform 2 and the base 1 form a linear motion pair. The specific structure is as follows: The base 1 is provided with parallel linear guide rails X101 and a rack 102. The bottom of the moving platform 2 is provided with a slider X201. The slider X201 is slidably connected to the linear guide rail X101. The rack 102 is meshed and driven with the gear 202. The gear 202 is fixedly connected to the output shaft of the motor X203. The motor X203 is fixedly connected to the moving platform 2. The left limit and right limit of the moving platform 2 are respectively controlled by proximity switches (controlling the limit by proximity switches belongs to the conventional technical means in the art. The proximity switch can be an optoelectronic switch or a mechanical switch, which will not be elaborated here and is not shown in the figure either).
[0036] The material box bracket 4 and the lifting unit 5 are arranged in the left - right direction and are both fixedly connected to the moving platform 2.
[0037] The material box bracket 4 is used to hold the aggregate box 3, as Figures 5 - 6As shown, the aggregate box 3 is an open box body formed by a first inclined plate 301, a second inclined plate 302, a fixed baffle 304 and a movable baffle 305. The first inclined plate 301 and the second inclined plate 302 are symmetrically arranged, and the included angle between the first inclined plate 301 and the second inclined plate 302 is β, and β ≤ 150° (in order to make the falling particles gather at the included angle for easy dumping); the fixed baffle 304 is fixedly connected to the first ends of the first inclined plate 301 and the second inclined plate 302, and the top of the movable baffle 305 is rotatably connected to the second ends of the first inclined plate 301 and the second inclined plate 302. When it is necessary to dump the particles, it is tilted to one side of the movable baffle 305. Under the action of gravity, the lower end of the movable baffle 305 is separated from the first inclined plate 301 and the second inclined plate 302, as Figure 7 shown, which is convenient for the opening at the included angle so that the particles can fall into the next standard sieve. A flanging 303 is provided at the upper end of the aggregate box 3, and a number of rolling balls 401 are provided on the top of the box bracket 4. The rolling balls 401 are used to support the flanging 303 of the aggregate box 3; a limit baffle 402 is also provided on the top of the box bracket 4 for positioning when the aggregate box 3 is placed.
[0038] The lifting unit 5 is used to drive the electronic scale 6 to lift, as Figure 4 shown. The lifting unit 5 includes a bottom support 501, a screw elevator 502, a lifting platform 503, a guide rod 504 and a guide tube 505. The bottom support 501 is fixedly connected to the moving platform 2. The fixed end of the screw elevator 502 and the guide tube 505 are both fixedly connected to the bottom support 501. The lifting end of the screw elevator 502 is fixedly connected to the lifting platform 503. The guide rod 504 is fixedly connected to the lifting platform 503, and the guide rod 504 is slidably connected to the guide tube 505. The electronic scale 6 is fixed on the top of the lifting platform 503.
[0039] The gantry 8 is fixedly connected to the base 1. The screening unit 7 is arranged at the top of the gantry 8 and is located above the aggregate box 3 and the electronic scale 6. The screening unit 7 includes a sieve base 705, a motor Y702, a crank-rocker mechanism and an elastic reset mechanism. The motor Y702 is a motor without a brake. The crank-rocker mechanism and the elastic reset mechanism are respectively arranged on the left and right sides of the sieve base 705. The sieve base 705 is used to place the standard sieve 9. The motor Y702 is fixedly connected to the motor bracket 701, and the motor bracket 701 is fixedly connected to the gantry 8. The crank-rocker mechanism includes a crank 703 and a rocker 704. One end of the crank 703 is fixedly connected to the output shaft of the motor Y702, the other end of the crank 703 is hinged to the first end of the rocker 704, and the second end of the rocker 704 is hinged to the sieve base 705. A slider Y708 is fixed to the bottom of the sieve base 705. The slider Y708 is slidably connected to the linear guide Y801, and the linear guide Y801 is fixedly connected to the gantry 8. The elastic reset mechanism includes a tension spring 706. The two ends of the tension spring 706 are respectively fixedly connected to the sieve base 705 and the tension spring seat 707, and the tension spring seat 707 is fixedly connected to the gantry 8. A plurality of rollers 709 are arranged on the inner wall of the sieve base 705 for contacting the outer wall of the standard sieve 9. The plurality of rollers 709 are arranged in a circumferential uniform distribution. The rotation axis of the rollers 709 is horizontal. The rollers 709 are polyurethane-coated bearing rollers (commercially available products). The rollers 709 are installed on the roller mounting seat 710, and the roller mounting seat 710 is fixedly connected to the sieve base 705.
[0040] The proximity switch and the electronic scale 6 are both connected to the controller. The actions of the motor X203, the motor Y702 and the screw lift 502 are all controlled by the controller. When the moving platform 2 is at the right limit position, the aggregate box 3 is located below the sieve base 705. When the moving platform 2 is at the left limit position, the electronic scale 6 is located below the sieve base 705.
[0041] Usage of this embodiment:
[0042] After sieving the standard sleeve sieve on the shaking sieve machine for 10 minutes, starting from the largest sieve number in the order of sieve hole size, each sieve is screened using this embodiment. The specific operations are as follows:
[0043] Place the standard sieve 9 into the sieve base 705 under the guidance of the rollers 709. Control the moving platform 2 to be at the left limit position so that the electronic scale 6 is located below the sieve base 705, as Figure 12 shown; control the screw lift 502 to rise to the upper position, as Figure 13 shown, and the electronic scale 6 holds up the standard sieve 9 and weighs it as G1; control the screw lift 502 to descend to the lower position so that the standard sieve 9 falls into the sieve base 705 under the guidance of the rollers 709, as Figure 12 shown; place the aggregate box 3 on the material box bracket 4, and control the moving platform 2 to be at the right limit position so that the aggregate box 3 is located below the sieve base 705, as Figure 14As shown; control the motor Y702 to operate for 1 minute, so that the standard sieve 9 is sieved for 1 minute, and the small particles sieved out fall into the aggregate box 3; control the moving platform 2 to be at the left limit position, so that the electronic scale 6 is located below the sieve base 705, as Figure 12 shown; control the screw lift 502 to rise to the upper position, as Figure 13 shown, the electronic scale 6 holds up the standard sieve 9 and weighs it as G2; calculate and display through the controller .
[0044] When the displayed result is not greater than 0.1%, the controller prompts: Incorporate the material in the aggregate box 3 into the next standard sieve, and perform sieving on the next standard sieve according to the above operations.
[0045] When the displayed result is greater than 0.1%, the controller prompts: Re-perform sieving on the current standard sieve according to the above operations.
Claims
1. A screening device for fine aggregate screening test in civil engineering, characterized by: The invention comprises a controller, a base (1), a mobile platform (2), a material box bracket (4), a material collection box (3), a lifting unit (5), an electronic scale (6), a screening unit (7) and a gantry (8); the mobile platform (2) and the base (1) form a linear moving pair, the linear motion of the mobile platform (2) is driven by a motor X (203), and the left limit and the right limit of the mobile platform (2) are respectively controlled by proximity switches; the material box bracket (4) and the lifting unit (5) are arranged in the left-right direction and are fixedly connected to the mobile platform (2); the material collection box (3) is placed on the material box bracket (4), and the electronic scale (6) and the lifting unit (5) are connected to the material box bracket (4). The lifting end of the element (5) is fixedly connected; the gantry (8) is fixedly connected to the base (1); the screening unit (7) is arranged on the top of the gantry (8), and the screening unit (7) is located above the collection box (3) and the electronic scale (6); the screening unit (7) includes a screen seat (705), the screen seat (705) is used to place the standard screen (9), and the reciprocating motion of the screen seat (705) is driven by a motor Y (702); when the mobile platform (2) is located at the right limit position, the collection box (3) is located below the screen seat (705); when the mobile platform (2) is located at the left limit position, the electronic scale (6) is located below the screen seat (705).
2. The screening device for civil engineering fine aggregate screening test according to claim 1, characterized in that: The screening unit (7) further comprises a crank-rocker mechanism and an elastic reset mechanism, wherein the motor Y (702) is fixedly connected to the motor bracket (701), and the motor bracket (701) is fixedly connected to the gantry (8); the crank-rocker mechanism comprises a crank (703) and a rocker (704), wherein one end of the crank (703) is fixedly connected to the output shaft of the motor Y (702), and the other end of the crank (703) is hinged to the first end of the rocker (704), and the rocker (704) is hinged to the first end of the rocker (704). The second end of the sieve seat (705) is hingedly connected to the sieve seat (705); a slider Y (708) is fixed to the bottom of the sieve seat (705); the slider Y (708) is slidably connected to the linear guide rail Y (801); the linear guide rail Y (801) is fixedly connected to the gantry (8); the elastic reset mechanism includes a tension spring (706); the two ends of the tension spring (706) are respectively fixedly connected to the sieve seat (705) and the tension spring seat (707); the tension spring seat (707) is fixedly connected to the gantry (8).
3. The screening device for civil engineering fine aggregate screening test according to claim 1, characterized in that: A plurality of rollers (709) are provided on the inner wall of the sieve seat (705) for contacting the outer wall of the standard sieve (9); the plurality of rollers (709) are evenly arranged in a circle, and the rotation axes of the rollers (709) are horizontal.
4. The screening device for civil engineering fine aggregate screening test according to claim 3 is characterized by: The roller (709) is a polyurethane rubber-coated bearing roller.
5. The screening device for civil engineering fine aggregate screening test according to claim 1, characterized in that: The material collection box (3) comprises a first inclined plate (301) and a second inclined plate (302) which are symmetrically arranged, and the angle between the first inclined plate (301) and the second inclined plate (302) is β, and β is ≤150°.
6. The screening device for civil engineering fine aggregate screening test according to claim 5, characterized in that: The material collecting box (3) comprises a fixed baffle (304) and a movable baffle (305); the fixed baffle (304) is fixedly connected to the first ends of the first inclined plate (301) and the second inclined plate (302); and the movable baffle (305) is rotatably connected to the second ends of the first inclined plate (301) and the second inclined plate (302).
7. The screening device for civil engineering fine aggregate screening test according to claim 1, characterized in that: The upper end of the material collecting box (3) is provided with a flange (303), and the top of the material box bracket (4) is provided with a plurality of balls (401), and the balls (401) are used to support the flange (303) of the material collecting box (3); a limit baffle (402) is also provided on the top of the material box bracket (4).
8. The screening device for civil engineering fine aggregate screening test according to claim 1, characterized in that: The lifting unit (5) comprises a base (501), a screw lift (502), a lifting platform (503), a guide rod (504) and a guide tube (505); the base (501) is fixedly connected to the mobile platform (2); the fixed end of the screw lift (502) and the guide tube (505) are both fixedly connected to the base (501); the lifting end of the screw lift (502) is fixedly connected to the lifting platform (503); the guide rod (504) is fixedly connected to the lifting platform (503); the guide rod (504) is slidably connected to the guide tube (505); and the electronic scale (6) is fixedly connected to the lifting platform (503).