A stone screening device and method for mortar production

Abstract

The present invention relates to the field of stone screening technology, and discloses a stone screening device and method for mortar production, comprising a support frame 1 and a support frame 2, wherein the upper end of the support frame 1 is fixedly connected with a support plate, the upper end of the support plate is fixedly connected with two groups of first mounting plates, a feeding mechanism for transporting stones is commonly arranged between the two groups of the first mounting plates, the upper end of the support frame 2 is fixedly connected with two groups of second mounting plates, the front end of the second mounting plates is fixedly connected with the first mounting plates, a screening mechanism for screening stones is commonly arranged between the two groups of the second mounting plates, and a discharging mechanism is arranged at the lower end of the screening mechanism. The advantages of the present invention are that the stones fall through the trapezoidal groove in sequence from small to large, which effectively avoids the stone from being stuck or blocked, and improves the screening efficiency, completes the multi-stage screening of large, medium and small stones, so as to achieve the detailed separation of stones.

Description

Technical Field

[0001] The invention relates to the technical field of stone screening, and in particular to a stone screening device and method for mortar production. Background Art

[0002] Mortar production refers to the process of manufacturing mortar used in building and construction. Gravel is needed as a raw material in the manufacture of mortar. In order to ensure that the size of the gravel in the mortar meets the production requirements, a gravel screening device is needed to screen the size of the gravel. The gravel that meets the size requirements is screened out and put into the production of mortar to ensure the quality and efficiency of mortar manufacturing.

[0003] The shapes of stones are mostly irregular, and they are prone to getting stuck or clogging the sieve holes during the screening process, thus affecting the screening efficiency. In addition, when screening a large number of stones, there will be a large impact force when the stones are discharged. For this reason, we propose a stone screening device and method for mortar production. Summary of the invention

[0004] The present invention adopts the following technical scheme to solve the above-mentioned technical problems: a stone screening device for mortar production is provided, including a support frame 1 and a support frame 2, the upper end of the support frame 1 is fixedly connected to a support plate, the upper end of the support plate is fixedly connected to two groups of first mounting plates, a feeding mechanism for transporting stone is commonly arranged between the two groups of the first mounting plates, the upper end of the support frame 2 is fixedly connected to two groups of second mounting plates, the front end of the second mounting plate is fixedly connected to the first mounting plate, a screening mechanism for screening stone is commonly arranged between the two groups of the second mounting plates, a discharging mechanism is arranged at the lower end of the screening mechanism, the opposite sides of the two groups of the first mounting plates are fixedly connected to an arc plate 1, and the feeding mechanism includes two groups of first turntables and two groups of second turntables.

[0005] Preferably, the first turntable is rotatably connected to the first mounting plate, the second turntable is rotatably connected to the second mounting plate, multiple groups of connecting rollers 1 are commonly fixedly connected between the two groups of the first turntables, multiple groups of connecting rollers 2 are commonly fixedly connected between the two groups of the second turntables, the outer sides of the connecting rollers 1 and 2 are rotatably connected with conveyor belt 1, the inner side of the conveyor belt 1 is provided with multiple groups of leakage holes, and the arc plate 1 is movably connected to the surface of the conveyor belt 1.

[0006] Preferably, a first motor is provided on the outer side of the second mounting plate, the output end of the first motor is fixedly connected to the second turntable, the inner side of the first mounting plate is movably connected with a collecting trough, the collecting trough is located between the conveyor belt 1 and the support plate, a handle is fixedly connected to one side of the collecting trough, the upper ends of the two groups of the first mounting plates are commonly fixedly connected with a top cover, the upper end of the top cover is provided with a feed hopper, the lower end of the top cover is fixedly connected with a connecting frame, and the lower end of the connecting frame is rotatably connected with a rotating rod.

[0007] Preferably, the screening mechanism includes a first roller and a second roller, the first roller and the second roller are rotatably connected between two groups of second mounting plates, the outer sides of the first roller and the second roller are rotatably connected to a conveyor belt 2, the upper end of the conveyor belt 2 is movably connected to two groups of arc plates 2, the two groups of arc plates 2 are symmetrical to each other, the lower end of the arc plate 2 is fixedly connected to a baffle plate 1, and the front end of the baffle plate 1 is fixedly connected to the arc plate 1.

[0008] Preferably, the rear end of baffle one is fixedly connected to baffle two, the rear ends of the two groups of baffles two are commonly fixedly connected to a third mounting plate, the third mounting plate is fixedly connected between the two groups of second mounting plates, the outer side of the conveyor belt two is movably connected to two groups of mutually symmetrical third rollers, one end of the third roller is rotatably connected to the second mounting plate, and the surface of the conveyor belt two is provided with multiple groups of moving components, and the moving components are movably connected between the two groups of baffles two.

[0009] Preferably, the lower ends of the two groups of baffle plates are movably connected to a sieve stone plate, the front end of the sieve stone plate is fixedly connected to a transition plate, the inner side of the sieve stone plate is provided with a plurality of trapezoidal grooves, the inner side of the trapezoidal grooves gradually widens from front to back, the two groups of second mounting plates are fixedly connected to a fixed plate on opposite sides, a slide groove is provided at the upper end of the fixed plate, a slider is slidably connected to the inner side of the slide groove, and the upper end of the slider is fixedly connected to the sieve stone plate.

[0010] Preferably, an electric push rod is installed on the inner wall of one of the two groups of the second mounting plates, the electric push rod is located on the inner side of the slide groove, the output end of the electric push rod is fixedly connected to the slider, and a second motor is arranged on the outer side of the second mounting plate, and the output end of the second motor is fixedly connected to the first roller.

[0011] Preferably, the moving component includes a first push plate, the first push plate is fixedly connected to the second conveyor belt, both ends of the first push plate are provided with connecting grooves, the inner side of the connecting groove is movably connected with a sliding rod, one end of the sliding rod is fixedly connected to the second push plate, and the second push plate and the connecting groove are movably connected with a spring.

[0012] Preferably, the discharging mechanism includes multiple groups of discharging hoppers, the lower end of the discharging hopper is fixedly connected to a buffer chamber, the lower end of the buffer chamber is installed with a discharging disk, the inner side of the buffer chamber is rotatably connected to a connecting disk, the outer side of the connecting disk is fixedly connected to multiple groups of rotating plates, one end of the rotating plate is affixed to the inner wall of the buffer chamber, the inner sides of the multiple groups of connecting disks are commonly fixedly connected with a center rod, the lower end of the support plate is fixedly connected to a support ear, the inner side of the support ear is installed with a third motor, and the output end of the third motor is fixedly connected to the center rod.

[0013] A method for screening gravel for mortar production comprises the following steps:

[0014] S1: Pour the stones to be screened into the inner side of the feed hopper, so that the stones fall uniformly onto the conveyor belt 1, then start the first motor to rotate the second turntable, and the conveyor belt 1 vibrates when the connecting roller 2 is connected with the connecting roller 1, so that the sand contained in the stones falls down when the stones are transported backward, and the sand falls into the collecting tank through the leakage hole for collection;

[0015] S2: while the conveyor belt 1 is running, the second motor is started, the second motor causes the first roller to rotate clockwise, and in cooperation with the second roller, the conveyor belt 2 is operated. When the conveyor belt 2 is operated, the plurality of moving components are driven to move together. When the moving components move from the upper side of the conveyor belt 2 to the lower side thereof, the stones on the conveyor belt 1 are moved backward along with the operation of the conveyor belt 2.

[0016] S3: The moving assembly pushes the stones onto the sieve stone plate as the conveyor belt 2 runs, and the electric push rod is started to move the sieve stone plate back and forth to both sides, and a part of the smaller stones fall first through the trapezoidal grooves on the sieve stone plate, and the remaining stones continue to roll backward on the sieve stone plate as the first push plate moves, until the screening is completed through the trapezoidal grooves;

[0017] S4: The small stones that fall first will fall into the first group of discharge hoppers, and the larger stones will fall into the next group of discharge hoppers in turn. At the same time, the third motor is started. When the stones fall into the inner side of the buffer chamber through the discharge hopper, the central rod drives multiple groups of connecting disks to rotate at the same time, and the stones inside the buffer chamber are transmitted through the rotating plate. Finally, the stones of different sizes are collected on the discharge disk.

[0018] Compared with the prior art, the present invention provides a stone screening device and method for mortar production, which has the following beneficial effects:

[0019] 1. A stone screening device and method for mortar production, through each rotation of the connecting roller 1 and the connecting roller 2, drives the conveyor belt 1 to vibrate while causing it to operate, and the stones piled on the surface thereof are vibrated evenly through the vibration, so that the first push plate can transfer the stones in batches, and then screen them. At the same time, under the action of vibration, the sand and other small impurities in the stones to be screened can be dropped through the leakage holes and collected in the collecting tank, so as to ensure the quality of the stones after the subsequent screening and discharge.

[0020] 2. A stone screening device and method for mortar production, by opening a trapezoidal groove on the stone screening plate, and pushing the stone on the trapezoidal groove at a uniform speed under the push of the first push plate, when moving backward, the inner side of the trapezoidal groove gradually widens, and the stones from small to large also fall through the trapezoidal groove in sequence, effectively avoiding the stone from getting stuck or blocked, and improving the screening efficiency.

[0021] 3. A gravel screening device and method for mortar production pushes gravel onto the sieve stone plate in sequence through a first push plate. Smaller stones will first fall through the trapezoidal groove. Under the inclined design of the sieve stone plate and with the movement of the first push plate, the gravel will continue to roll backward until slightly larger stones fall through the gradually widening trapezoidal groove on the inside, completing multi-stage screening of large, medium and small stones to achieve detailed separation of the stones.

[0022] 4. A stone screening device and method for mortar production. The screened stones fall into the buffer chamber through the discharge hopper. At this time, the third motor is started, and the connecting plate drives the rotating plate to rotate under the connection of the center rod, so that the screened stones are transmitted in batches, changing the movement trajectory of the falling stones, effectively reducing the impact force caused by the falling stones, and avoiding damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a partial structural schematic diagram of the present invention;

[0025] Figure 3 The feeding mechanism of the present invention is cut away Figure 1 ;

[0026] Figure 4 The feeding mechanism of the present invention is cut away Figure 2 ;

[0027] Figure 5 The screening mechanism of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 6 The screening mechanism of the present invention is shown in FIG. Figure 2 ;

[0029] Figure 7 The screening mechanism of the present invention explodes Figure 1 ;

[0030] Figure 8 is a cross-sectional view of a moving assembly of the present invention;

[0031] Fig. 9 The screening mechanism of the present invention explodes Figure 2 ;

[0032] Fig.10 It is a partial structural schematic diagram of the screening mechanism of the present invention;

[0033] Fig.11 The discharging mechanism of the present invention is cut away Figure 1 ;

[0034] Fig.12 The discharging mechanism of the present invention is cut away Figure 2 .

[0035] In the figure: 1, support frame 1; 2, support frame 2; 3, support plate; 4, first mounting plate; 5, feeding mechanism; 6, second mounting plate; 7, screening mechanism; 8, discharging mechanism; 9, arc plate 1; 51, first turntable; 52, second turntable; 53, connecting roller 1; 54, connecting roller 2; 55, conveyor belt 1; 56, leak hole; 57, collecting trough; 58, handle; 59, top cover; 510, feed hopper; 511, connecting frame; 512, rotating rod; 513, first motor; 71, first rotating roller; 72, second rotating roller; 73, conveyor belt 2; 74, arc plate 2; 7 5. Baffle 1; 76. Baffle 2; 77. Third mounting plate; 78. Third rotating roller; 79. Moving assembly; 791. First push plate; 792. Connecting groove; 793. Slide bar; 794. Second push plate; 795. Spring; 710. Screen stone plate; 711. Transition plate; 712. Trapezoidal groove; 713. Fixed plate; 714. Slide groove; 715. Sliding block; 716. Electric push rod; 717. Second motor; 81. Discharging hopper; 82. Buffer chamber; 83. Discharging tray; 84. Connecting tray; 85. Rotating plate; 86. Center rod; 87. Support ear; 88. Third motor. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] See also Figure 1 - Fig.12A stone screening device for mortar production comprises a support frame 1 and a support frame 2. The upper end of the support frame 1 is fixedly connected with a support plate 3. The upper end of the support plate 3 is fixedly connected with two groups of first mounting plates 4. A feeding mechanism 5 for transporting stones is commonly arranged between the two groups of first mounting plates 4. The upper end of the support frame 2 is fixedly connected with two groups of second mounting plates 6. The front end of the second mounting plate 6 is fixedly connected with the first mounting plate 4. A screening mechanism 7 for screening stones is commonly arranged between the two groups of second mounting plates 6. A discharging mechanism 8 is arranged at the lower end of the screening mechanism 7. The opposite sides of the two groups of first mounting plates 4 are fixedly connected with an arc plate 9. The feeding mechanism 5 comprises two groups of first turntables 51 and two groups of second turntables 52.

[0038] In this embodiment, the first turntable 51 is rotatably connected to the first mounting plate 4, the second turntable 52 is rotatably connected to the second mounting plate 6, a plurality of connecting rollers 53 are commonly fixedly connected between the two groups of first turntables 51, a plurality of connecting rollers 54 are commonly fixedly connected between the two groups of second turntables 52, a conveyor belt 55 is rotatably connected to the outer sides of the connecting rollers 1 53 and 2, a plurality of leakage holes 56 are provided on the inner side of the conveyor belt 55, and an arc plate 9 is movably connected to the surface of the conveyor belt 55.

[0039] Specifically, the second turntable 52 is rotated by starting the first motor 513, causing the multiple sets of connecting rollers 2 54 to rotate along with the second turntable 52. In cooperation with the connecting roller 1 53, the conveyor belt 1 55 is pulled to operate and the stones are transported backwards. At the same time, the conveyor belt 1 55 vibrates with each rotation of the connecting roller 1 53 and the connecting roller 2 54.

[0040] In this embodiment, a first motor 513 is provided on the outer side of the second mounting plate 6, and the output end of the first motor 513 is fixedly connected to the second turntable 52. A collecting trough 57 is movably connected to the inner side of the first mounting plate 4. The collecting trough 57 is located between the conveyor belt 55 and the support plate 3. A handle 58 is fixedly connected to one side of the collecting trough 57. The upper ends of the two groups of first mounting plates 4 are commonly fixedly connected to a top cover 59. A feed hopper 510 is provided at the upper end of the top cover 59. The lower end of the top cover 59 is fixedly connected to a connecting frame 511, and the lower end of the connecting frame 511 is rotatably connected to a rotating rod 512.

[0041] Specifically, the vibration of the conveyor belt 55 and the cooperation with the rotating rod 512 will make the piled stones flat and smooth, and the sand in them will be shaken off through the leakage hole 56 and collected in the collecting trough 57. The stones move along with the conveyor belt 55 and approach the screening mechanism 7 under the restriction of the two sets of arc plates 9.

[0042] In this embodiment, the screening mechanism 7 includes a first roller 71 and a second roller 72, the first roller 71 and the second roller 72 are rotatably connected between the two groups of second mounting plates 6, the outer sides of the first roller 71 and the second roller 72 are rotatably connected with a conveyor belt 2 73, the upper end of the conveyor belt 2 73 is movably connected with two groups of arc plates 2 74, the two groups of arc plates 2 74 are symmetrical to each other, the lower end of the arc plate 2 74 is fixedly connected with a baffle 1 75, the front end of the baffle 1 75 is fixedly connected with the arc plate 1 9, the rear end of the baffle 1 75 is fixedly connected with a baffle 2 76, the rear ends of the two groups of baffles 2 76 are commonly fixedly connected with a third mounting plate 77, the third mounting plate 77 is fixedly connected between the two groups of second mounting plates 6, the outer side of the conveyor belt 2 73 is movably connected with two groups of third rollers 78 that are symmetrical to each other, one end of the third roller 78 is rotatably connected to the second mounting plate 6, and the surface of the conveyor belt 2 73 is provided with a plurality of moving components 79, and the moving components 79 are movably connected between the two groups of baffles 2 76.

[0043] Specifically, by connecting the arc plate 1 9, the baffle plate 1 75 and the baffle plate 2 76, after the stone enters the area of ​​the screening mechanism 7, the moving path of the stone is restricted so that the stone can be smoothly moved to the screen stone plate 710 for screening. Since the screen stone plate 710 is designed to be inclined, by installing the third roller 78 on the outer side of the conveyor belt 2 73, the transportation trajectory of part of the conveyor belt 2 73 is changed, so that when the conveyor belt 2 73 drives the moving component 79 backward to push the stone, the first push plate 791 can always fit with the upper end of the screen stone plate 710 to avoid the stone being unable to be pushed.

[0044] In this embodiment, the lower ends of the two groups of baffles 76 are movably connected to a sieve stone plate 710, the front end of the sieve stone plate 710 is fixedly connected to a transition plate 711, and the inner side of the sieve stone plate 710 is provided with multiple groups of trapezoidal grooves 712, and the inner side of the trapezoidal grooves 712 gradually widens from front to back. The opposite sides of the two groups of second mounting plates 6 are fixedly connected to a fixed plate 713, and the upper end of the fixed plate 713 is provided with a slide groove 714, and the inner side of the slide groove 714 is slidably connected to a slider 715, and the upper end of the slider 715 is fixedly connected to the sieve stone plate 710.

[0045] Specifically, the first push plate 791 is used to push the stones onto the sieve stone plate 710 in sequence, and the smaller stones will first fall through the trapezoidal groove 712. Under the inclined design of the sieve stone plate 710 and with the movement of the first push plate 791, the stones will continue to roll backwards until slightly larger stones fall through the gradually widening trapezoidal groove 712 on the inside, thereby completing the multi-stage screening of large, medium and small stones.

[0046] In this embodiment, an electric push rod 716 is installed on the inner wall of one of the two groups of second mounting plates 6. The electric push rod 716 is located on the inner side of the slide groove 714. The output end of the electric push rod 716 is fixedly connected to the slider 715. A second motor 717 is provided on the outer side of the second mounting plate 6. The output end of the second motor 717 is fixedly connected to the first roller 71.

[0047] Specifically, after the stones are transferred to the sieve stone plate 710 in batches, the electric push rod 716 can be started, and the electric push rod 716 causes the sieve stone plate 710 to shake, thereby promoting the stones to fall through the trapezoidal groove 712 and assisting the stone screening.

[0048] In this embodiment, the moving component 79 includes a first push plate 791, which is fixedly connected to the conveyor belt 73. Both ends of the first push plate 791 are provided with connecting grooves 792. The inner side of the connecting groove 792 is movably connected to a slide rod 793. One end of the slide rod 793 is fixedly connected to a second push plate 794. The second push plate 794 and the connecting groove 792 are movably connected with a spring 795.

[0049] Specifically, when the first push plate 791 pushes the stones to be screened on the sieve stone plate 710, since the front end portion of the sieve stone plate 710 is used to screen smaller stones, and the rear end portion is used to screen larger stones, that is, the distance between the two sets of baffle plates 76 gradually widens from front to back, the first push plate 791 moves backward between the two sets of baffle plates 76. As the distance between the two sets of baffle plates 76 gradually increases, at this time, the second push plates 794 at both ends of the first push plate 791 gradually move out from the inner side of the connecting groove 792 under the action of the spring 795, keeping the two ends in contact with the inner wall of the baffle plate 76, ensuring that the stones can be pushed to complete the screening.

[0050] In this embodiment, the discharging mechanism 8 includes a plurality of discharging hoppers 81, the lower end of the discharging hopper 81 is fixedly connected with a buffer chamber 82, the lower end of the buffer chamber 82 is installed with a discharging disk 83, the inner side of the buffer chamber 82 is rotatably connected with a connecting disk 84, the outer side of the connecting disk 84 is fixedly connected with a plurality of rotating plates 85, one end of the rotating plate 85 is affixed to the inner wall of the buffer chamber 82, the inner sides of the plurality of connecting disks 84 are commonly fixedly connected with a center rod 86, the lower end of the support plate 3 is fixedly connected with a support ear 87, the inner side of the support ear 87 is installed with a third motor 88, and the output end of the third motor 88 is fixedly connected with the center rod 86.

[0051] Specifically, the screened stones fall into the buffer chamber 82 through the discharge hopper 81. At this time, the third motor 88 is started, and the connecting plate 84 drives the rotating plate 85 to rotate under the connection of the central rod 86, so as to transfer the screened stones in batches, change the movement trajectory of the falling stones, and effectively reduce the impact force caused by the falling stones.

[0052] A stone screening method for mortar production comprises the following steps:

[0053] S1: Pour the stones to be screened into the inner side of the feed hopper 510, so that the stones fall onto the conveyor belt 55 uniformly, and then start the first motor 513 to rotate the second turntable 52, and the conveyor belt 55 vibrates when the connecting roller 2 54 is connected with the connecting roller 1 53, so that the sand contained in the stones falls down when the stones are transported backward, and the sand falls into the collecting tank 57 through the leakage hole 56 for collection;

[0054] S2: while the conveyor belt 1 55 is running, the second motor 717 is started, the second motor 717 causes the first roller 71 to rotate clockwise, and in cooperation with the second roller 72, the conveyor belt 2 73 is operated, and when the conveyor belt 2 73 is operated, it drives the multiple groups of moving components 79 to move together, and when the moving components 79 move from the upper side of the conveyor belt 2 73 to the lower side thereof, the stones on the conveyor belt 1 55 are moved backwards along with the operation of the conveyor belt 2 73;

[0055] S3: The moving assembly 79 pushes the stones onto the sieve stone plate 710 as the conveyor belt 2 73 runs, and the electric push rod 716 is started to move the sieve stone plate 710 back and forth to both sides, and a part of the smaller stones fall first through the trapezoidal groove 712 provided on the sieve stone plate 710, and the remaining stones continue to roll backward on the sieve stone plate 710 as the first push plate 791 moves, until the screening is completed through the trapezoidal groove 712;

[0056] S4: The small stones that fall first will fall into the first group of discharge hoppers 81, and the larger stones will fall into the next group of discharge hoppers 81 in turn. At the same time, the third motor 88 is started. When the stones fall into the inner side of the buffer chamber 82 through the discharge hopper 81, the center rod 86 drives the multiple groups of connecting plates 84 to rotate at the same time, and the stones inside the buffer chamber 82 are transmitted through the rotating plate 85. Finally, the stones that have been screened by size are collected on the discharge plate 83.

[0057] When in use, the stones to be screened are poured into the feed hopper 510, and then the stones will fall onto the conveyor belt 1 55 uniformly. The first motor 513 is started to rotate the second turntable 52, prompting the multiple groups of connecting rollers 2 54 to rotate along with the second turntable 52. In cooperation with the connecting rollers 1 53, the conveyor belt 1 55 is pulled to operate, and the stones are transported backward. At the same time, the conveyor belt 1 55 will vibrate under the action of each rotation of the connecting rollers 1 53 and 2 54, and the stones piled together will be shaken in cooperation with the rotating rod 512. The conveyor belt 55 is leveled, and the sand particles therein are shaken off through the leakage hole 56 and collected into the collecting tank 57. The stones move with the conveyor belt 55 and approach the screening mechanism 7 under the restriction of the two sets of arc plates 9. At the same time, the second motor 717 is started to make the first roller 71 rotate clockwise. The first roller 71 cooperates with the second roller 72 to make the conveyor belt 2 73 operate and drive the moving assembly 79 to move. In the process of the plurality of first push plates 791 following the operation of the conveyor belt 2 73 moving from the upper side to the lower side, they will all move from the conveyor belt 1 55, a part of the stones are moved backward together, and the stones are transferred to the sieve stone plate 710 in batches. At this time, the electric push rod 716 can be started, and the electric push rod 716 causes the sieve stone plate 710 to shake, so that a part of the small stones can first pass through the trapezoidal groove 712 and fall into the discharge hopper 81, and the larger stones continue to move with the movement of the first push plate 791, and under the inclined state set by the sieve stone plate 710, the larger stones are caused to roll backward until they pass through the trapezoidal groove 712 in turn and fall into the next group of discharge hoppers 81, completing The screening process of large and small stones is that the small stones passing through the trapezoidal groove 712 will fall into the first group of discharge hoppers 81 first, and the larger stones will fall into the next group of discharge hoppers 81 by analogy. The third motor 88 is started, and the multiple groups of connecting plates 84 are rotated counterclockwise at the same time under the connection of the central rod 86, so that the rotating plate 85 transfers the stones that fall into the buffer chamber 82 in batches, and reduces the impact force caused by the falling stones. Finally, the screened stones are collected on the discharge tray 83 respectively, which is convenient for the staff to carry out the next step of operation.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stone screening device for mortar production, comprising a support frame 1 (1) and a support frame 2 (2), characterized in that: The upper end of the support frame 1 (1) is fixedly connected to a support plate (3), the upper end of the support plate (3) is fixedly connected to two groups of first mounting plates (4), a feeding mechanism (5) for transporting stones is arranged between the two groups of the first mounting plates (4), the upper end of the support frame 2 (2) is fixedly connected to two groups of second mounting plates (6), the front end of the second mounting plates (6) is fixedly connected to the first mounting plates (4), a screening mechanism (7) for screening stones is arranged between the two groups of the second mounting plates (6), a discharging mechanism (8) is arranged at the lower end of the screening mechanism (7), the two groups of the first mounting plates (4) are fixedly connected to the opposite sides thereof, the feeding mechanism (5) comprises two groups of first A rotating disk (51), two groups of second rotating disks (52), the first rotating disk (51) being rotatably connected to a first mounting plate (4), the second rotating disk (52) being rotatably connected to a second mounting plate (6), a plurality of groups of connecting rollers (53) being fixedly connected between the two groups of the first rotating disks (51), a plurality of groups of connecting rollers (54) being fixedly connected between the two groups of the second rotating disks (52), a conveyor belt (55) being rotatably connected to the outer sides of the connecting rollers (53) and the connecting rollers (54), a plurality of groups of leakage holes (56) being provided on the inner side of the conveyor belt (55), the arc plate (9) being movably connected to the surface of the conveyor belt (55), a first motor (513) being provided on the outer side of the second mounting plate (6), the first connecting roller (53) and the second connecting roller (54) being rotatably connected to the outer sides of the conveyor belt (55), The output end of a motor (513) is fixedly connected to the second turntable (52); a collecting trough (57) is movably connected to the inner side of the first mounting plate (4); the collecting trough (57) is located between the conveyor belt (55) and the support plate (3); a handle (58) is fixedly connected to one side of the collecting trough (57); a top cover (59) is fixedly connected to the upper ends of the two groups of the first mounting plates (4); a feed hopper (510) is provided at the upper end of the top cover (59); a connecting frame (511) is fixedly connected to the lower end of the top cover (59); a rotating rod (512) is rotatably connected to the lower end of the connecting frame (511); the screening mechanism (7) comprises a first rotating roller (71) and a second rotating roller (72); the first rotating roller ( 71), the second rotating roller (72) is rotatably connected between the two groups of second mounting plates (6), the outer sides of the first rotating roller (71) and the second rotating roller (72) are rotatably connected to a conveyor belt (73), the upper end of the conveyor belt (73) is movably connected to two groups of arc plates (74), the two groups of arc plates (74) are symmetrical to each other, the lower end of the arc plate (74) is fixedly connected to a baffle plate (75), the front end of the baffle plate (75) is fixedly connected to the arc plate (9), the rear end of the baffle plate (75) is fixedly connected to the baffle plate (76), the rear ends of the two groups of baffle plates (76) are fixedly connected to a third mounting plate (77), and the third mounting plate (77) is fixedly connected between the two groups of second mounting plates (6),The outer side of the conveyor belt 2 (73) is movably connected with two groups of third rollers (78) which are symmetrical to each other. One end of the third roller (78) is rotatably connected to the second mounting plate (6). The surface of the conveyor belt 2 (73) is provided with a plurality of moving components (79). The moving components (79) are movably connected between the two groups of baffle plates 2 (76). The lower ends of the two groups of baffle plates 2 (76) are movably connected with a sieve stone plate (710). The front end of the sieve stone plate (710) is fixedly connected with a transition plate (711). The inner side of the sieve stone plate (710) is provided with a plurality of trapezoidal grooves (712). The inner side of the trapezoidal grooves (712) gradually changes from front to back. The width of the second mounting plates (6) is fixedly connected to a fixing plate (713) on one side opposite to the other of the two groups of the second mounting plates (6); a slide groove (714) is provided on the upper end of the fixing plate (713); a slider (715) is slidably connected to the inner side of the slide groove (714); the upper end of the slider (715) is fixedly connected to the sieve stone plate (710); an electric push rod (716) is installed on the inner wall of one group of the two groups of the second mounting plates (6); the electric push rod (716) is located on the inner side of the slide groove (714); the output end of the electric push rod (716) is fixedly connected to the slider (715); a second motor (717) is provided on the outer side of the second mounting plates (6); The output end of the second motor (717) is fixedly connected to the first roller (71), the moving assembly (79) includes a first push plate (791), the first push plate (791) is fixedly connected to the second conveyor belt (73), both ends of the first push plate (791) are provided with connecting grooves (792), the inner side of the connecting groove (792) is movably connected to a slide bar (793), one end of the slide bar (793) is fixedly connected to a second push plate (794), the second push plate (794) and the connecting groove (792) are movably connected to a spring (795), the discharging mechanism (8) includes a plurality of discharging hoppers (81), the discharging hoppers ( The lower end of the support plate (3) is fixedly connected to a buffer chamber (82), the lower end of the buffer chamber (82) is installed with a discharge tray (83), the inner side of the buffer chamber (82) is rotatably connected to a connection tray (84), the outer side of the connection tray (84) is fixedly connected to multiple groups of rotating plates (85), one end of the rotating plates (85) is in contact with the inner wall of the buffer chamber (82), the inner sides of the multiple groups of connection trays (84) are commonly fixedly connected to a center rod (86), the lower end of the support plate (3) is fixedly connected to a support ear (87), the inner side of the support ear (87) is installed with a third motor (88), and the output end of the third motor (88) is fixedly connected to the center rod (86).

2. A stone screening method for mortar production, characterized in that: The stone screening device for mortar production according to claim 1 comprises the following steps: S1: pouring stones to be screened into the inner side of the feed hopper (510) so that the stones fall uniformly onto the conveyor belt (55), then starting the first motor (513) to rotate the second turntable (52), and causing the conveyor belt (55) to vibrate when the connecting roller (54) and the connecting roller (53) are connected, so that the sand contained in the stones falls off when the stones are transported backward, and the sand falls into the collecting trough (57) through the leakage hole (56) for collection; S2: while the conveyor belt 1 (55) is running, the second motor (717) is started, the second motor (717) causes the first roller (71) to rotate clockwise, and in cooperation with the second roller (72), the conveyor belt 2 (73) is driven to run, and when the conveyor belt 2 (73) is running, it drives the multiple groups of moving components (79) to move together, and when the moving components (79) move from the upper side of the conveyor belt 2 (73) to the lower side thereof, the stones on the conveyor belt 1 (55) are moved backwards along with the running of the conveyor belt 2 (73); S3: The moving assembly (79) pushes the stones onto the sieve stone plate (710) as the conveyor belt (73) operates, and the electric push rod (716) is activated to move the sieve stone plate (710) back and forth to the sides, and a portion of the smaller stones fall first through the trapezoidal groove (712) provided on the sieve stone plate (710), and the remaining stones continue to roll backward on the sieve stone plate (710) as the first push plate (791) moves, until the sieve stone plate (710) is screened through the trapezoidal groove (712); S4: The small stones that fall first fall into the first group of discharge hoppers (81), and the larger stones fall into the next group of discharge hoppers (81) in turn. At the same time, the third motor (88) is started. When the stones fall into the inner side of the buffer chamber (82) through the discharge hopper (81), the central rod (86) drives the multiple groups of connecting plates (84) to rotate simultaneously, and the stones in the buffer chamber (82) are transmitted through the rotating plate (85). Finally, the stones that have been screened by size are collected on the discharge plate (83).

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