A sand screening device for construction engineering

Abstract

The application is suitable for the technical field of building engineering, and provides a building engineering sand screening device, which comprises an erecting table, a first sand screening assembly slidingly arranged in the erecting table and a second sand screening assembly slidingly arranged in the erecting table; the first sand screening assembly comprises a first sand filtering piece and a wall scraping piece rotatingly arranged in the first sand filtering piece; the second sand screening assembly comprises a sliding piece and a second sand filtering piece slidingly arranged in the sliding piece; the device solves and can simultaneously perform first screening, second screening and stirring of building sand, avoids adhesion of sand to the device during screening, and only needs to use the same driving source to realize the whole process of first screening, second screening and stirring of sand, so that no additional power source is needed to realize the first screening, second screening and stirring of sand, thereby improving the screening efficiency of sand and reducing the waste of sand during screening.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, more particularly, it relates to a building engineering sand screening device. BACKGROUND

[0002] Sand used in building engineering is the main component material of concrete and mortar, and sand has a very wide application in building engineering. The prepared sand can not only save cement, but also improve the compactness and strength of concrete and mortar. Therefore, the sand needs to be screened according to the specific engineering needs to achieve the required properties of the concrete and other materials, so as to ensure the construction quality.

[0003] At present, the building engineering sand screening device on the market has the following problems in the process of use:

[0004] The existing building engineering sand screening device is difficult to simultaneously perform primary screening, secondary screening and stirring of building sand in the process of use, which leads to the phenomenon of sand hardening in the whole screening process. Meanwhile, the existing building engineering sand screening device is difficult to simultaneously realize the primary screening, secondary screening and stirring of sand by using the same driving source, and cannot scrape the sand attached to the inner wall of the sand screening box, which easily leads to the waste of sand and reduces the screening efficiency of sand. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide a building engineering sand screening device which can simultaneously perform primary screening, secondary screening and stirring of building sand, avoid sand from being attached to the inside of the device during the screening process, and only need to use the same driving source to realize primary screening, secondary screening and stirring during the whole process, without the need of additional power source to separately realize primary screening, secondary screening and stirring, so as to improve the screening efficiency of sand and reduce the waste of sand during the screening process.

[0006] To achieve the above purpose, the present application provides the following technical scheme:

[0007] A building engineering sand screening device comprises a mounting table, a primary sand screening assembly slidingly arranged in the mounting table, and a secondary sand screening assembly slidingly arranged in the mounting table.

[0008] The primary sand screening assembly comprises a primary sand filtering member and a wall scraping member rotationally arranged in the primary sand filtering member.

[0009] The secondary sand screening assembly comprises a sliding member and a secondary sand filtering member slidingly arranged in the sliding member.

[0010] The primary sand filter includes a sand screening box, a sand inlet hopper at the top of the sand screening box, a rectangular ring fixed to the inner wall of the sand screening box, a primary screen near the bottom of the inner wall of the sand screening box, rectangular grooves at the top and bottom of the rectangular ring, an inclined guide plate fixed to the inner wall of the sand inlet hopper, a feed frame fixed to one side of the inclined guide plate, and a sleeve connected to the top of the inclined guide plate at a position slightly off-center.

[0011] The scraping component includes a rotating shaft rotatably connected to the inner wall of the sleeve via a bearing. A sliding rod is fixed to the circumferential side of the rotating shaft. A sliding cylinder is slidably fitted to the circumferential side of the sliding rod. An elastic spring is fixed to the inner wall of the sliding cylinder and one end face of the sliding rod. Two symmetrical guide rods are fixed to the circumferential side of the rotating shaft. Limiting plates that are slidably fitted to the circumferential sides of the two guide rods are fixed to the outer circumferential side of the sliding cylinder. A connecting rod is fixed to the outer end of the sliding cylinder. Sliding columns that are slidably fitted inside the two rectangular grooves are fixed to both ends of the connecting rod. A ball is rolledly fitted to the opposite end face of the two sliding columns. The ball is rolledly fitted to the rectangular groove. A folding plate is fixed to the circumferential side of the connecting rod. A scraper is fixed to one side of the folding plate.

[0012] The present invention is further configured such that: two symmetrical load-bearing plates are fixed to the two inner side walls of the erecting platform, and a sliding groove is provided on the top of each of the two load-bearing plates; and a rectangular inlet is provided through one outer side of the erecting platform.

[0013] The bottom of the sand screening box has two symmetrical internal grooves, and each of the two internal grooves is equipped with several guide wheels that roll in cooperation with the sliding groove.

[0014] The present invention is further configured such that: a rectangular connection port is provided through the other outer side of the support platform located below the two load-bearing plates.

[0015] The sliding component includes a positioning frame that is slidably disposed inside the rectangular connection port. Two symmetrical connecting lugs are fixed on one outer side of the positioning frame, and both connecting lugs are connected to one outer side of the mounting platform by bolt threads.

[0016] The present invention is further configured such that: a base frame is fixed inside the positioning frame, a plurality of columns are fixed on the top of the base frame, and a vertical groove is provided through one side of the positioning frame.

[0017] The secondary sand filter includes a secondary screen, the top of which has several sliding holes that slide in conjunction with the column, and a T-shaped rail that slides in conjunction with the vertical groove is fixed on one side of the secondary screen.

[0018] The present invention is further configured such that: a U-shaped plate is fixed on one side of the T-shaped rail, a U-shaped base plate is fixed on the top of the U-shaped plate, an I-shaped slider is slidably fitted inside the U-shaped base plate, a vertical plate is fixed on the top of the I-shaped slider, and a circular hole is opened on one side of the vertical plate near the top.

[0019] The erection table is fixed with a support leg on each of the two outer sides, a stable frame is fixed on the top of the support leg, a U-shaped seat is fixed on one outer side of the erection table, a double-shaft motor is fixed on the inner side of the U-shaped seat, a rotating rod is fixed on one output shaft of the double-shaft motor, the rotating rod penetrates the U-shaped seat and the stable frame in sequence and is rotatably connected with the U-shaped seat and the stable frame, an eccentric wheel is fixed on one end of the rotating rod, and the peripheral side of the eccentric wheel is in close contact with the inner wall of the circular hole.

[0020] The outer side of the erection table is provided with a transverse groove, another output shaft of the double-shaft motor is fixed with a rotating plate, and a push rod is fixed on one side of the rotating plate.

[0021] One outer side of the sand screening box is fixed with a guide rail which is in sliding connection with the transverse groove, one side of the guide rail is fixed with a vertical plate, and a push rod groove is formed in one side of the vertical plate and is in sliding connection with the push rod.

[0022] The outer top of the U-shaped seat is fixed with a connecting plate, the top of the connecting plate is fixed with two symmetrical L-shaped plates, a rectangular cross frame is fixed between the two L-shaped plates, and a gear strip is fixed on the inner wall of the rectangular cross frame.

[0023] The outer top of the sand inlet hopper is fixed with a horizontal frame plate, a rotating shaft is rotatably connected with the horizontal frame plate through a bearing, and a rotating gear is fixed on the top of the rotating shaft and is in engagement with the gear strip.

[0024] The bottom of the rotating shaft is fixed with a rotating cylinder, and an annular gear is fixed on the inner wall of the rotating cylinder.

[0025] The top of the rotating shaft is fixed with a spur gear which is in engagement with the annular gear.

[0026] The bottom of the rotating shaft is fixed with a stirring shaft, and a stirring auger is arranged on the peripheral side of the stirring shaft.

[0027] The inner wall of the erection table is fixed with an inclined discharging plate near the bottom, and a limiting circular plate is fixed on one end of each of the two guide rods.

[0028] The advantages of the present application are:

[0029] 1. The distance between the center point of the sliding column and the center point of the rotating shaft changes at any time through the counterclockwise and clockwise rotation of the rotating shaft in the sleeve, and the elastic spring fixed between the sliding cylinder and the sliding rod is repeatedly stretched or compressed, so that the folding plate fixed on the peripheral side of the connecting rod and the scraping plate fixed on one side of the folding plate can always be in contact with the inner wall of the sand screening box, the sand adhered to the inner wall of the sand screening box is scraped off, the sand is prevented from adhering to the inner wall of the sand screening box, and the waste of sand during the sand screening process is reduced.

[0030] 2、The invention provides a reciprocating horizontal force for the vertical plate by starting the double-shaft motor, driving the rotating plate fixed by the other output shaft of the double-shaft motor and the shifting rod fixed on one side of the rotating plate to repeatedly slide in the shifting rod slot on one side of the vertical plate, driving the guide rail fixed on the outer side of the sand screening box to repeatedly slide horizontally in the horizontal slot, so that the sand screening box repeatedly shakes in the left and right directions in the erecting table, and the first-stage filtering process of the sand is realized.

[0031] 3、The invention realizes the reciprocating up-down shaking of the U-shaped plate, the T-shaped rail and the second-stage screen in the positioning frame 1 by the rotation of the eccentric wheel in the circular hole and the reciprocating up-down movement of the vertical plate, so that the sand screened in the first stage is further screened in the second stage, and the screening efficiency of the sand is improved.

[0032] 4、The invention prevents the sand in the sand screening box from caking by the clockwise and counterclockwise rotation of the stirring auger fixed on the stirring shaft.

[0033] 5、The invention realizes the first-stage screening, the second-stage screening and the stirring by the same driving source, and does not need additional power sources to realize the first-stage screening, the second-stage screening and the stirring, so that the screening efficiency of the sand is improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a structural schematic view of the sand screening device for construction engineering.

[0035] Figure 2 It is a sectional structure side view of the sand screening device for construction engineering.

[0036] Figure 3 It is a structural schematic view of the erecting table.

[0037] Figure 4 It is a front view of the erecting table.

[0038] Figure 5 It is a side view of the erecting table.

[0039] Figure 6 It is a top view of the erecting table.

[0040] Figure 7 It is a sectional structure schematic view of the first-stage sand screening assembly.

[0041] Figure 8 It is a structural schematic view of the second-stage sand screening assembly.

[0042] Figure 9 The sectional structure of the primary sand filtering component.

[0043] Figure 10 The sectional structure of the primary sand filtering component.

[0044] Figure 11 The structure of the wall scraping component.

[0045] Figure 12 The sectional structure of the wall scraping component.

[0046] Figure 13 The structure of the sliding component.

[0047] Figure 14 The structure of the secondary sand filtering component.

[0048] Figure: 1, erecting table; 2, primary sand screening assembly; 3, secondary sand screening assembly; 4, primary sand filtering component; 5, wall scraping component; 6, sliding component; 7, secondary sand filtering component; 101, load bearing plate; 102, sliding groove; 103, rectangular inlet; 104, rectangular connecting port; 105, support leg; 106, stabilizing frame; 107, U-shaped seat; 108, double shaft motor; 109, rotating rod; 110, eccentric wheel; 111, transverse slot; 112, rotating plate; 113, lever; 114, discharge plate; 115, connecting plate; 116, L-shaped plate; 117, rectangular cross frame; 118, gear strip; 401, sand screening box; 402, rectangular ring; 403, primary screen mesh; 404, rectangular slot; 405, sand inlet hopper; 406, inclined material guide plate; 407, material inlet frame; 408, sleeve; 409, built-in slot; 410, guide wheel; 411, guide rail; 412, vertical plate; 413, lever slot; 414, annular tooth; 415, cross frame plate; 416, rotating shaft; 417, rotating gear; 418, rotating cylinder; 501, rotating shaft; 502, sliding rod; 503, sliding cylinder; 504, elastic spring; 505, guide rod; 506, limiting plate; 507, connecting rod; 508, sliding column; 509, ball; 510, folding plate; 511, scraper; 512, stirring shaft; 513, stirring auger; 514, limiting circular plate; 515, spur gear; 601, positioning frame; 602, connecting lug plate; 603, bottom plate frame; 604, stand column; 605, vertical slot; 701, secondary screen mesh; 702, sliding hole; 703, T-shaped rail; 704, U-shaped plate; 705, U-shaped base plate; 706, I-shaped sliding block; 707, vertical plate; 708, circular hole. DETAILED DESCRIPTION

[0049] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0050] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0051] In the present application, unless otherwise specified, the orientation such as "up, down" is generally directed to the direction shown in the drawings, or is directed to the vertical, perpendicular or gravity direction; similarly, for the convenience of understanding and description, "left, right" is generally directed to the left and right shown in the drawings; "inner, outer" refers to the inner and outer relative to the contour of each component, but the above orientation words are not used to limit the present application.

[0052] Embodiment one, please refer to Figures 1-14 The present application provides the following technical solutions:

[0053] A building engineering sand screening device, specifically, comprising a mounting table 1, a first sand screening assembly 2 slidingly arranged in the mounting table 1, and a second sand screening assembly 3 slidingly arranged in the mounting table 1; the first sand screening assembly 2 comprises a first sand filtering piece 4 and a wall scraping piece 5 rotatingly arranged in the first sand filtering piece 4; the second sand screening assembly 3 comprises a sliding piece 6 and a second sand filtering piece 7 slidingly arranged in the sliding piece 6; the first sand filtering piece 4 comprises a sand screening box 401, the sand screening box 401 is provided with a sand inlet chute 405 at the top, the inner wall of the sand screening box 401 is fixedly provided with a rectangular ring 402, a first screen mesh 403 is arranged on the inner wall of the sand screening box 401 close to the bottom, rectangular grooves 404 are formed in the upper and lower portions of the rectangular ring 402, the inner wall of the sand inlet chute 405 is fixedly provided with an inclined material guide plate 406, the inclined material guide plate 406 is fixedly provided with a feeding frame 407 on one side, and a sleeve 408 is communicated with the top of the inclined material guide plate 406; the wall scraping piece 5 comprises a rotating shaft 501 rotatingly connected to the inner wall of the sleeve 408, the rotating shaft 501 is fixedly provided with a sliding rod 502 on the circumferential surface, the sliding rod 502 is slidingly provided with a sliding cylinder 503, the inner wall of the sliding cylinder 503 is fixedly provided with an elastic spring 504 on one end surface of the sliding rod 502, the rotating shaft 501 is fixedly provided with two symmetrical guide rods 505 on the circumferential surface, the sliding cylinder 503 is fixedly provided with limiting plates 506 slidingly arranged in the circumferential surface of the two guide rods 505, respectively, the outer end of the sliding cylinder 503 is fixedly provided with a connecting rod 507, the connecting rod 507 is fixedly provided with sliding columns 508 slidingly arranged in the two rectangular grooves 404, respectively, the opposite end surfaces of the two sliding columns 508 are rollingly provided with spherical bodies 509, the spherical bodies 509 are rollingly arranged in the rectangular grooves 404, the circumferential surface of the connecting rod 507 is fixedly provided with a folding plate 510, and the folding plate 510 is fixedly provided with a scraping plate 511 on one side.

[0054] The specific application of the first embodiment is: when the whole device is running, the rotating shaft 501 in the wall scraping part 5 can be repeatedly rotated counterclockwise and clockwise inside the sleeve 408, driving the sliding columns 508 fixed at both ends of the connecting rod 507 to slide inside the rectangular groove 404 respectively. During the sliding process of the sliding columns 508 inside the rectangular groove 404, the rolling cooperation between the ball 509 on one end surface of the sliding column 508 and the rectangular groove 404 can drive the whole wall scraping part 5 to roll and slide counterclockwise and clockwise more smoothly inside the sand screening box 401. During this process, since the sleeve 408 is eccentrically connected to the inclined guide plate 406, when the rotating shaft 501 in the wall scraping part 5 is repeatedly rotated counterclockwise and clockwise inside the sleeve 408, the distance between the center point of the sliding column 508 and the center point of the rotating shaft 501 changes at any time. When the distance between the center point of the sliding column 508 and the center point of the rotating shaft 501 changes, the elastic spring 504 connected between the sliding cylinder 503 and the sliding rod 502 can be repeatedly stretched or compressed. In this way, during the rotation process, it can be ensured that the folding plate 510 fixed on the side of the connecting rod 507 and the scraping plate 511 fixed on one side of the folding plate 510 can always be in contact with the inner wall of the sand screening box 401, so that the rotating shaft 501 in the wall scraping part 5 can scrape the sand attached to the inner wall of the sand screening box 401 during the repeated counterclockwise and clockwise rotation inside the sleeve 408, thereby reducing the amount of sand attached to the inner wall of the sand screening box 401 during the first sand screening, and reducing the waste of sand during the sand screening process.

[0055] Embodiment two, please refer to Figures 1-14The embodiment two is improved based on the embodiment one, specifically, the two bearing plates 101 are symmetrically fixed on the two inner side walls of the erecting table 1, the top of the two bearing plates 101 is provided with the sliding groove 102, and the outer side of the erecting table 1 is provided with the rectangular entrance 103; the outer bottom of the sand screening box 401 is provided with the two built-in grooves 409, the inside of the two built-in grooves 409 is provided with the guide wheels 410 which are in rolling cooperation with the sliding groove 102; the outer side of the erecting table 1 is provided with the rectangular connecting entrance 104 below the two bearing plates 101; the sliding part 6 comprises the positioning frame 601 which is slidingly arranged in the rectangular connecting entrance 104, the outer side of the positioning frame 601 is fixed with the two connecting lug plates 602 which are symmetrically arranged, the two connecting lug plates 602 are in threaded connection with the outer side of the erecting table 1 through the bolts; the inside of the positioning frame 601 is fixed with the bottom plate frame 603, the top of the bottom plate frame 603 is fixed with the plurality of vertical columns 604, and the vertical groove 605 is provided in the side of the positioning frame 601; the secondary sand filtering part 7 comprises the secondary screen 701, the top of the secondary screen 701 is provided with the plurality of sliding holes 702 which are in sliding cooperation with the vertical columns 604, and the side of the secondary screen 701 is fixed with the T-shaped rail 703 which is in sliding cooperation with the vertical groove 605; the side of the T-shaped rail 703 is fixed with the U-shaped plate 704, the top of the U-shaped plate 704 is fixed with the U-shaped base plate 705, the inside of the U-shaped base plate 705 is slidingly matched with the I-shaped sliding block 706, the top of the I-shaped sliding block 706 is fixed with the vertical plate 707, the side of the vertical plate 707 is provided with the circular hole 708 near the top; the outer side of the erecting table 1 is fixed with the supporting leg 105, the top of the supporting leg 105 is fixed with the stabilizing frame 106, the outer side of the erecting table 1 is fixed with the U-shaped seat 107, the inner side of the U-shaped seat 107 is fixed with the double-shaft motor 108, the output shaft of the double-shaft motor 108 is fixed with the rotating rod 109, the rotating rod 109 penetrates the U-shaped seat 107 and the stabilizing frame 106 in sequence and is in rotary cooperation with the U-shaped seat 107 and the stabilizing frame 106 respectively, one end of the rotating rod 109 is fixed with the eccentric wheel 110, and the peripheral side of the eccentric wheel 110 is in close contact with the inner wall of the circular hole 708; the outer side of the erecting table 1 is provided with the horizontal groove 111, the other output shaft of the double-shaft motor 108 is fixed with the rotating plate 112, and the side of the rotating plate 112 is fixed with the pushing rod 113; the outer side of the sand screening box 401 is fixed with the guide rail 411 which is in sliding cooperation with the horizontal groove 111, the side of the guide rail 411 is fixed with the vertical plate 412, and the side of the vertical plate 412 is provided with the pushing rod groove 413 which is in sliding cooperation with the pushing rod 113; the outer top of the U-shaped seat 107 is fixed with the connecting plate 115, the top of the connecting plate 115 is fixed with the two L-shaped plates 116 which are symmetrically arranged, the rectangular horizontal frame 117 is fixed between the two L-shaped plates 116, and the inner wall of the rectangular horizontal frame 117 is fixed with the gear strip 118; the outer top of the sand inlet chute 405 is fixed with the horizontal frame plate 415, the top of the horizontal frame plate 415 is rotatably matched with the rotating shaft 416 through the bearing, the top of the rotating shaft 416 is fixed with the rotating gear 417 which is in meshing cooperation with the gear strip 118; the bottom of the rotating shaft 416 is fixed with the rotating cylinder 418, and the inner wall of the rotating cylinder 418 is fixed with the annular teeth 414;The top of the rotating shaft 501 is fixed with a straight gear 515 engaged with the annular gear 414; the bottom of the rotating shaft 501 is fixed with a stirring shaft 512, and the lateral surface of the stirring shaft 512 is provided with a stirring auger 513; the inner wall of the erecting table 1 near the bottom is fixed with an oblique discharging plate 114, and one end of each of the two guide rods 505 is fixed with a limiting circular plate 514.

[0056] The specific application of the second embodiment is that the sliding hole 702 at the top of the secondary screen 701 is slidably connected to the vertical column 604 fixed on the top of the bottom plate frame 603, and at the same time, the T-shaped rail 703 fixed on one side of the secondary screen 701 is slid into the vertical slot 605, thereby completing the sliding connection between the secondary screen 701 and the positioning frame 601. After the sliding connection is completed, the positioning frame 601 in the sliding part 6 can be slid into the rectangular connecting port 104 until the two connecting lug plates 602 fixed on one side of the positioning frame 601 are attached to one side of the erection table 1, and then the sliding is stopped. Then, the connecting lug plates 602 are connected and fixed to one side of the erection table 1 by bolts, so that the sliding part 6 is slidably connected to the erection table 1 together with the secondary sand filtering part 7 slidably connected in the sliding part 6. After the sliding part 6 is slidably connected to the erection table 1 together with the secondary sand filtering part 7 slidably connected in the sliding part 6, the sliding cooperation between the work-shaped sliding block 706 and the U-shaped base plate 705 is performed until the circular hole 708 on the vertical plate 707 slides to the outer circumferential surface of the eccentric wheel 110, and the inner wall of the circular hole 708 is attached to the circumferential surface of the eccentric wheel 110. After that, the work-shaped sliding block 706 and the U-shaped base plate 705 are connected and fixed by bolts, so as to perform secondary filtering in the later stage. The sand for construction can first enter the sand screening box 401 through the sand inlet chute 405, and then the double-shaft motor 108 is started to drive the rotating plate 112 fixed on the other output shaft of the double-shaft motor 108 and the push rod 113 fixed on one side of the rotating plate 112 to slide reciprocally in the push rod groove 413 formed on one side of the vertical plate 412, thereby providing a reciprocating horizontal force to the vertical plate 412 and driving the guide rail 411 fixed on one side of the sand screening box 401 to slide reciprocally horizontally in the horizontal groove 111, so that the sand screening box 401 shakes reciprocally left and right in the erection table 1. When the sand screening box 401 shakes reciprocally left and right in the erection table 1, the rolling cooperation between the guide wheel 410 and the sliding groove 102 reduces the friction during the sliding of the sand screening box 401 in the erection table 1, and finally realizes the first filtering process of the sand. In addition, when the double-shaft motor 108 is started, the rotating rod 109 fixed on the output shaft of the double-shaft motor 108 rotates on the U-shaped seat 107 and the stabilizing frame 106 in turn, so that the eccentric wheel 110 fixed on one end of the rotating rod 109 rotates in the circular hole 708 formed on one side of the vertical plate 707 near the top. During the rotation, the eccentric wheel 110 reciprocally provides a force to the vertical plate 707, thereby driving the vertical plate 707 to move reciprocally up and down. The reciprocating up and down movement of the vertical plate 707 drives the U-shaped plate 704, the T-shaped rail 703, and the secondary screen 701 to shake reciprocally up and down in the positioning frame 601, thereby performing secondary screening on the sand screened by the first screen and falling on the top of the secondary screen 701.The sand of the secondary screening can be finally discharged through the inclined discharge plate 114 fixed to the inner wall of the erected table 1 near the bottom, so as to improve the screening efficiency of the sand. In the above-mentioned process of the primary screening and the secondary screening, with the starting of the double-shaft motor 108, the rotating plate 112 fixed to the other output shaft of the double-shaft motor 108 and the poking rod 113 fixed to one side of the rotating plate 112 can also slide in the poking rod groove 413 opened in one side of the vertical plate 412, so as to repeatedly provide a horizontal moving force for the vertical plate 412, so that the sand screening box 401 repeatedly moves left and right in the erected table 1. The left and right repeated movement of the sand screening box 401 in the erected table 1 can drive the rotating shaft 416 rotatably connected to the horizontal frame plate 415 to repeatedly rotate clockwise or counterclockwise on the horizontal frame plate 415. When the rotating shaft 416 repeatedly rotates clockwise or counterclockwise on the horizontal frame plate 415, the rotating cylinder 418 fixed to the bottom of the rotating shaft 416 and the annular teeth 414 fixed to the inner wall of the rotating cylinder 418 also repeatedly rotate clockwise or counterclockwise, thereby driving the straight gear 515 fixed to the top of the rotating shaft 501 to repeatedly rotate clockwise and counterclockwise, so that the rotating shaft 501 repeatedly rotates clockwise and counterclockwise in the sand screening box 401, so as to change the clockwise and counterclockwise rotation of the stirring shaft 512 fixed to the bottom of the rotating shaft 501 and the stirring auger 513 fixed to the circumferential surface of the stirring shaft 512, so as to prevent the sand in the sand screening box 401 from caking during the primary screening of the sand. In the whole process, only one driving source is needed to realize the primary screening, the secondary screening and the stirring, without the need of additional power sources to realize the primary screening, the secondary screening and the stirring respectively, so as to improve the screening efficiency of the sand.

[0057] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work should belong to the scope of protection of the present application.

[0058] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0059] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and the above-described accompanying drawings are used only to distinguish similar objects and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0060] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0061] The above only describes the preferred embodiments of the present application and the protection scope of the present application is not limited to the above-described embodiments. Any technical solution falling within the concept of the present application shall be included in the protection scope of the present application. It should be noted that for ordinary skilled in the art, several improvements and refinements without departing from the principle of the present application shall be considered as the protection scope of the present application.

Claims

1. A construction site sand screening device comprising a staging platform (1) characterised in that: A first sand screening assembly (2) is slidably arranged inside the erecting table (1), and a second sand screening assembly (3) is slidably arranged inside the erecting table (1); The first sand screening assembly (2) comprises a first sand filtering piece (4), and a wall scraping piece (5) is rotationally arranged inside the first sand filtering piece (4); The second sand screening assembly (3) comprises a sliding piece (6), and a second sand filtering piece (7) is slidably arranged inside the sliding piece (6); The first sand filtering piece (4) comprises a sand screening box (401), the sand screening box (401) is provided with a sand inlet chute (405) at the top, the inner wall of the sand screening box (401) is fixedly provided with a rectangular ring (402), a first screen (403) is arranged on the inner wall of the sand screening box (401) close to the bottom, the upper and lower parts of the rectangular ring (402) are provided with rectangular grooves (404), the inner wall of the sand inlet chute (405) is fixedly provided with an inclined material guide plate (406), the inclined material guide plate (406) is fixedly provided with a feeding frame (407) on one side, and the top of the inclined material guide plate (406) is connected with a sleeve (408) at a position deviated from the center; The wall scraping piece (5) comprises a rotating shaft (501) rotationally connected to the inner wall of the sleeve (408), the rotating shaft (501) is fixedly provided with a sliding rod (502) on the circumferential surface, the sliding rod (502) is slidably provided with a sliding cylinder (503) on the circumferential surface, the inner wall of the sliding cylinder (503) and one end surface of the sliding rod (502) are fixedly provided with an elastic spring (504), the rotating shaft (501) is fixedly provided with two symmetrical guide rods (505) on the circumferential surface, the sliding cylinder (503) is fixedly provided with two limiting plates (506) slidably arranged on the circumferential surfaces of the two guide rods (505), respectively, the sliding cylinder (503) is fixedly provided with a connecting rod (507) at the outer end, the connecting rod (507) is fixedly provided with two sliding columns (508) slidably arranged in the two rectangular grooves (404), respectively, the opposite end surfaces of the two sliding columns (508) are rollingly provided with two spherical bodies (509), the spherical bodies (509) are rollingly arranged in the rectangular grooves (404), the connecting rod (507) is fixedly provided with a folding plate (510) on the circumferential surface, and the folding plate (510) is fixedly provided with a scraping plate (511) on one side.

2. A construction site sand screening device according to claim 1, characterised in that: The erecting table (1) is fixedly provided with two symmetrical bearing plates (101) on the opposite two inner side walls, the top of each of the two bearing plates (101) is provided with a sliding groove (102), and a rectangular inlet (103) is formed through one outer side surface of the erecting table (1); The outer bottom of the sand screening box (401) is provided with two symmetrical built-in grooves (409), and a plurality of guide wheels (410) rollingly arranged in the sliding grooves (102) are arranged in the two built-in grooves (409).

3. A construction site sand screening device according to claim 2, characterised in that: The erecting table (1) is provided with a rectangular connecting opening (104) through the other outer side surface below the two bearing plates (101). The sliding piece (6) comprises a positioning frame (601) slidingly arranged inside the rectangular connecting port (104), and the outer side of the positioning frame (601) is fixed with two symmetrical connecting lug plates (602), and the two connecting lug plates (602) are both threadedly connected with the outer side of the erecting table (1) through bolts.

4. A construction site sand screening device according to claim 3, characterised in that: The inner side of the positioning frame (601) is fixed with a bottom plate frame (603), the top of the bottom plate frame (603) is fixed with a plurality of stand columns (604), and the side of the positioning frame (601) is provided with a vertical groove (605) penetratingly formed. The secondary sand filtering piece (7) comprises a secondary screen mesh (701), the top of the secondary screen mesh (701) is provided with a plurality of sliding holes (702) slidingly matched with the stand columns (604), and the side of the secondary screen mesh (701) is fixed with a T-shaped rail (703) slidingly matched with the vertical groove (605).

5. A construction site sand screening device according to claim 4, characterised in that: The side of the T-shaped rail (703) is fixed with a U-shaped plate (704), the top of the U-shaped plate (704) is fixed with a U-shaped base plate (705), the inner side of the U-shaped base plate (705) is slidingly matched with an I-shaped sliding block (706), the top of the I-shaped sliding block (706) is fixed with a vertical plate (707), and the side of the vertical plate (707) is provided with a circular hole (708) near the top. The opposite two outer sides of the erecting table (1) are both fixed with support feet (105), the top of one support foot (105) is fixed with a stabilizing frame (106), the outer side of the erecting table (1) is fixed with a U-shaped seat (107), the inner side of the U-shaped seat (107) is fixed with a double-shaft motor (108), one output shaft of the double-shaft motor (108) is fixed with a rotating rod (109), the rotating rod (109) penetrates through the U-shaped seat (107) and the stabilizing frame (106) in sequence and is rotationally matched with the U-shaped seat (107) and the stabilizing frame (106) respectively, one end of the rotating rod (109) is fixed with an eccentric wheel (110), and the peripheral side of the eccentric wheel (110) is matched with the inner wall of the circular hole (708).

6. A construction site sand screening device according to claim 5, wherein: The outer side of the erecting table (1) is provided with a transverse groove (111), the other output shaft of the double-shaft motor (108) is fixed with a rotating plate (112), and the side of the rotating plate (112) is fixed with a pushing rod (113). The outer side of the sand screening box (401) is fixed with a guide rail (411) slidingly matched with the transverse groove (111), the side of the guide rail (411) is fixed with a vertical plate (412), and the side of the vertical plate (412) is provided with a pushing rod groove (413) slidingly matched with the pushing rod (113).

7. A construction site sand screening device according to claim 6, characterised in that: The outer top of the U-shaped seat (107) is fixed with a connecting plate (115), the top of the connecting plate (115) is fixed with two symmetrical L-shaped plates (116), a rectangular horizontal frame (117) is fixed between the two L-shaped plates (116), and a gear strip (118) is fixed to the inner wall of the rectangular horizontal frame (117). The horizontal frame plate (415) is fixed on the top of the sand inlet chute (405), a rotating shaft (416) is rotatably connected to the top of the horizontal frame plate (415) through a bearing, and a rotating gear (417) is fixed on the top of the rotating shaft (416) and engaged with the gear strip (118).

8. A construction site sand screening device according to claim 7, characterised in that: The bottom of the rotating shaft (416) is fixed with a rotating cylinder (418), and the inner wall of the rotating cylinder (418) is fixed with an annular tooth (414). The top of the rotating shaft (501) is fixed with a spur gear (515) engaged with the annular tooth (414).

9. A construction site sand screening device according to claim 8, characterised in that: The bottom of the rotating shaft (501) is fixed with a stirring shaft (512), and the stirring shaft (512) is provided with a stirring auger (513) on the side surface. The inclined discharge plate (114) is fixed on the inner wall of the erection table (1) near the bottom, and the one end of the two guide rods (505) is fixed with a limiting circular plate (514).

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