A sand and stone crusher

Abstract

The present application relates to a sand and gravel crusher, and to the technical field of sand and gravel processing, which includes: a crushing box; a first crushing roller, which is rotatably connected to the crushing box; a second crushing roller, which is rotatably connected to the crushing box and is arranged in parallel on one side of the first crushing roller, and a first crushing gap is formed between the first crushing roller and the second crushing roller on the side close to each other; a screening mesh roller, which is rotatably connected to the crushing box and is located on the side of the first crushing gap where materials are discharged, and the screening mesh roller is parallel to the first crushing roller, and a screening gap is formed between the first crushing roller and the side close to each other; a return material assembly, which is used to guide sand and gravel from the first crushing gap to the screening gap, and is used to call back the sand and gravel at the screening gap to fall back to the first crushing gap. The present application has the effect of reducing the labor consumption of sand and gravel crushing.

Description

Technical Field

[0001] The present application relates to the technical field of sand and gravel processing, and in particular to a sand and gravel crusher. Background Art

[0002] Sand and gravel refers to a loose mixture of sand and gravel. Sand and gravel usually need to be crushed before use to meet the use requirements of sand and gravel.

[0003] The existing sand and gravel crusher includes a crushing component and a screening component. The crushing component includes two crushing rollers arranged opposite to each other. The screening component includes a screening plate and a vibrating member. The screening plate is arranged below the two crushing rollers. The vibrating member is connected to the screening plate and is used to drive the screening plate to vibrate. When in use, the sand and gravel are poured between the two crushing rollers. The two crushing rollers rotate in opposite directions to crush the sand and gravel. The crushed sand and gravel fall on the screening plate. The vibrating member causes the screening plate to vibrate and screen. The sand and gravel under the vibrating screen are collected and used directly. The sand and gravel on the vibrating screen are collected and put back between the crushing rollers for secondary crushing.

[0004] Although the above scheme realizes the crushing and screening of sand and gravel, the sand and gravel on the vibrating screen need to be manually poured back between the two crushing rollers after being collected, thereby increasing the labor consumption of sand and gravel crushing. Summary of the invention

[0005] In order to reduce the labor consumed in sand and gravel crushing, the present application provides a sand and gravel crusher.

[0006] The present application provides a sand and gravel crusher, which adopts the following technical solution:

[0007] A sand and stone crusher, comprising:

[0008] Crushing box;

[0009] A first crushing roller is rotatably connected to the crushing box;

[0010] The second crushing roller is rotatably connected to the crushing box and is arranged in parallel on one side of the first crushing roller, and a first crushing gap is formed between the first crushing roller and the second crushing roller on the side close to each other;

[0011] A screening mesh roller is rotatably connected to the crushing box and is located on the discharge side of the first crushing gap. The screening mesh roller is parallel to the first crushing roller and forms a screening gap between the side of the screening mesh roller close to the first crushing roller.

[0012] The material return assembly comprises a material shifting slide plate, a first material guide plate, a second material guide plate and a transmission part;

[0013] in,

[0014] The material-discharging slide plate is slidably arranged in a slide groove provided on the side wall of the first crushing roller;

[0015] The first guide plate is arranged between the second crushing roller and the screening mesh roller, the first guide plate is fixedly connected to the crushing box, and is used to guide sand and gravel to the screening gap;

[0016] The second guide plate is arranged on the screening mesh roller, one side of the second guide plate abuts against the screening mesh roller, the second guide plate is fixedly connected to the crushing box, and is used to guide the sand and gravel to one side of the first crushing gap for feeding;

[0017] The transmission part is arranged on the first crushing roller, and is used to drive the material-selecting slide plate to slide into and out of the slide groove alternately by means of the driving force generated by the rotation of the first crushing roller;

[0018] When the material-discharging slide plate rotates to the first crushing gap, the transmission part drives the material-discharging slide plate to slide into the slide groove;

[0019] When the material-shifting slide plate rotates to the screening gap, the transmission part drives the material-shifting slide plate to slide out of the slide groove.

[0020] By adopting the above technical scheme, sand and gravel are poured into the first crushing gap, and the first crushing roller, the second crushing roller and the screening mesh roller are rotated. The first crushing roller and the second crushing roller crush the sand and gravel. The sand and gravel flow to the screening mesh roller under the action of the first guide plate. The screening mesh roller screens the sand and gravel during the rotation process. Unqualified sand and gravel particles remain in the screening gap, and qualified sand and gravel particles enter the screening mesh roller and fall from the screening mesh roller to the bottom of the crushing box.

[0021] Before the material-dividing slide plate rotates to the screening gap, the transmission part can drive the material-dividing slide plate to slide out of the chute, and the material-dividing slide plate can move the unqualified sand and gravel particles at the screening gap to between the first crushing roller and the second guide plate. Under the joint transportation action of the material-dividing slide plate, the second guide plate and the first crushing roller, the unqualified sand and gravel particles can automatically fall back to the first crushing gap for re-crushing; before the material-dividing slide plate rotates to the first crushing gap, the transmission part can drive the material-dividing slide plate to slide into the chute, so that the material-dividing slide plate is not easily stuck in the first crushing gap.

[0022] Therefore, unqualified sand and gravel particles can be intermittently driven to fall back to the first crushing gap through the material-shifting slide plate, and there is no need to manually pour the unqualified sand and gravel particles back into the first crushing gap, thereby reducing the labor consumed in sand and gravel crushing.

[0023] Optionally, the transmission unit includes:

[0024] A retraction spring is arranged between the material-shifting slide plate and the bottom of the slide groove, and is used to drive the material-shifting slide plate to slide into the slide groove;

[0025] A material return push rod is slidably arranged on the first crushing roller, one end of the material return push rod is inserted into the slide groove and is fixedly connected to the material shifting slide plate, and the other end of the material return push rod is inserted into the yield groove opened at the end of the first crushing roller;

[0026] The retracting block is located in the clearance groove and is fixedly connected to the crushing box;

[0027] The return material push block is located in the give way groove and is fixed on the side wall of the retracting block. Both ends of the return material push block and the side wall of the retracting block are in arc transition.

[0028] Among them, one end of the return material push rod located in the give way groove abuts against the retraction block or the return material push block.

[0029] By adopting the above technical scheme, since the first crushing roller can rotate relative to the retraction block and the return material push block, the return material push rod can cyclically and alternately abut against the retraction block and the return material push block when rotating with the first crushing roller. When the return material push block abuts against the return material push rod, the return material push block can push the material sliding plate to slide out of the slide groove. When the retraction block is directly opposite to the return material push rod, the retraction spring can drive the return material push rod to abut against the retraction block to make the material sliding plate slide into the slide groove, thereby making it easy for the material sliding plate to slide out of the slide groove and slide into the slide groove at the appropriate position when the first crushing roller rotates.

[0030] Optionally, a third crushing roller is arranged between the second crushing roller and the screening mesh roller, the third crushing roller is rotatably connected to the crushing box and is directly opposite to the first crushing gap, the third crushing roller is parallel to the first crushing roller, and a second crushing gap is formed between the third crushing roller and the side close to the first crushing roller, and the third crushing roller abuts against the screening mesh roller;

[0031] The first material guide plate is located between the second crushing roller and the third crushing roller, and the two sides thereof are respectively in contact with the second crushing roller and the third crushing roller. When the material-diverting slide plate rotates to the second crushing gap, the transmission part drives the material-diverting slide plate to slide out of the slide groove.

[0032] By adopting the above technical solution, the second crushing gap formed between the third crushing roller and the first crushing roller can perform secondary crushing on the sand and gravel. Before the sand and gravel are screened, the two crushing operations can improve the crushing effect of the sand and gravel, increase the probability of sand and gravel particles passing through the screening mesh roller, and thus speed up the overall crushing speed of the sand and gravel.

[0033] Optionally, a knocking assembly is provided on the screening mesh roller, and the knocking assembly includes a knocking shaft, a telescopic rod, a knocking block, a first magnetic block and a second magnetic block;

[0034] The knocking shaft is coaxially fixed in the screening mesh roller and rotatably penetrates the rodless cavity of the telescopic rod, and the knocking block is fixed on the movable end of the telescopic rod;

[0035] The first magnetic block is located in the rodless cavity of the telescopic rod and is fixed on the movable end of the telescopic rod. The second magnetic block is located in the rodless cavity of the telescopic rod and is embedded on one side of the knocking shaft. When the first magnetic block and the second magnetic block are in a facing state, the polarities of the first magnetic block and the second magnetic block on the side close to each other are opposite.

[0036] By adopting the above technical solution, when the knocking shaft rotates with the screening mesh roller, due to the gravity of the knocking block, the telescopic rod is always in a vertically downward extended state, and the knocking shaft can drive the second magnetic block to circulate opposite to the first magnetic block. When the second magnetic block is opposite to the first magnetic block, the second magnetic block absorbs the first magnetic block and slides upward, causing the telescopic rod to contract to increase the height of the knocking block. When the second magnetic block rotates away from the first magnetic block, the adsorption force of the second magnetic block on the first magnetic block is released, so that the knocking block can freely fall and knock on the screening mesh roller, so that the screening mesh roller can be subjected to knocking vibration during screening.

[0037] When the knocking block knocks on the screening mesh roller, the knocking block can knock and crush the few unqualified sand and gravel particles in the screening mesh roller, so that the unqualified sand and gravel particles entering the screening mesh roller can be further crushed into qualified sand and gravel particles.

[0038] Optionally, the knocking assembly also includes a support block, which is located in the crushing box and fixedly connected to the crushing box. The support block abuts against the outer wall of the screening mesh roller and is arranged in close contact with the outer wall of the screening mesh roller, and the support block is opposite to the knocking block.

[0039] By adopting the above technical solution, the support block is attached to the screening mesh roller. When the knocking block knocks on the screening mesh roller, the support block can support the screening mesh roller, so that the screening mesh roller is not easily deformed due to the knocking of the knocking block.

[0040] Optionally, a dust removal assembly is provided on the outer wall of the crushing box, and the dust removal assembly includes a dust removal air duct, a dust removal fan and a dust removal bag. One end of the dust removal air duct is connected to the side wall of the crushing box and is opposite to the screening mesh roller. The other end of the dust removal air duct is connected to the air inlet of the dust removal fan. The dust removal bag is fixed in the dust removal air duct, and the bag opening faces the screening mesh roller.

[0041] By adopting the above technical solution, the dust removal fan can suck the dust in the crushing box from the screening mesh roller into the dust removal bag through the dust removal air duct, thereby facilitating the cleaning of dust generated by sand and gravel crushing.

[0042] Optionally, the air outlet of the dust removal fan is connected to a blowing pipe, the blowing pipe is located in the crushing box, and one end of the blowing pipe is fixedly penetrated on the second material guide plate, and the pipe opening of the blowing pipe faces the second crushing roller.

[0043] By adopting the above technical solution, the dust removal fan can blow the filtered air from the blowing pipe to the second crushing roller. Since the pipe mouth of the blowing pipe is arranged on the second material guide plate, the wind force blown out by the blowing pipe can carry the sand and gravel pushed by the material-moving slide plate to impact the sand and gravel at the first crushing gap, thereby improving the crushing effect of the sand and gravel through impact crushing.

[0044] Optionally, the top of the crushing box is connected to a feed hopper, and the connection between the feed hopper and the crushing box is opposite to the first crushing gap.

[0045] By adopting the above technical solution, sand and gravel can be directly poured into the first crushing gap through the feed hopper.

[0046] Optionally, the feed hopper is in an inverted trapezoidal shape, and its two inclined side walls are respectively projected onto the first crushing roller and the second crushing roller, and the mouth of the feed hopper is provided with a cover plate and a closing plate, the cover plate is hinged to the inclined side wall of the feed hopper projected onto the first crushing roller, and the closing plate is fixed to the inclined side wall of the feed hopper projected onto the second crushing roller, and the whole formed by the cover plate and the closing plate is adapted to the mouth of the feed hopper, and a torsion spring is provided at the hinge between the cover plate and the inclined side wall of the feed hopper, and the torsion spring is used to drive the cover plate to close the mouth of the feed hopper.

[0047] By adopting the above technical solution, sand and gravel are directly poured onto the cover plate, and the sand and gravel can push the cover plate to rotate to open the mouth of the feed hopper. After the cover plate is tilted, the sand and gravel can flow to the inclined side wall of the feed hopper projected on the second crushing roller, and the sand and gravel can slide along the inclined side wall of the feed hopper projected on the second crushing roller to the first crushing gap, thereby improving the impact effect of the sand and gravel carried in the wind and the fed sand and gravel by adjusting the feeding direction of the sand and gravel.

[0048] When the sand and gravel are added, the cover plate can cooperate with the closing plate to close the hopper mouth under the action of the torsion spring, so that the dust in the crushing box is not easy to dissipate to the outside.

[0049] Optionally, a driving assembly is arranged outside the crushing box, the driving assembly comprises a first gear, a second gear, a first motor, a first pulley, a second pulley, a transmission belt and a second motor, the first gear is coaxially fixedly connected to the first crushing roller, the second gear is coaxially fixedly connected to the second crushing roller, the first gear is meshed with the second gear, the first motor is fixedly arranged on the side wall of the crushing box, and the output shaft of the first motor is coaxially fixedly connected to the first gear;

[0050] The first pulley is coaxially connected to the screening mesh roller, the second pulley is coaxially connected to the third crushing roller, the transmission belt is sleeved on the first pulley and the second pulley, the second motor is connected to the crushing box, and the output shaft of the second motor is coaxially connected to the second pulley.

[0051] By adopting the above technical solution, the first motor can drive the first crushing roller and the second crushing roller to rotate through the first gear and the second gear, and the second motor can drive the third crushing roller and the screening mesh roller to rotate through the first pulley, the second pulley and the transmission belt, so that the first crushing roller and the second crushing roller can rotate in opposite directions, and when the first crushing roller and the third crushing roller rotate in opposite directions, the screening mesh roller can rotate in the same direction as the first crushing roller.

[0052] In summary, the present application includes at least one of the following beneficial technical effects:

[0053] 1. By setting the first crushing roller, the second crushing roller, the third crushing roller, the screening mesh roller, the material-diverting slide plate, the first material guide plate and the second material guide plate, unqualified sand and gravel particles can automatically fall back to the first crushing gap, reducing the labor consumption of sand and gravel crushing;

[0054] 2. By setting the retraction spring, the return material push rod, the retraction block and the return material push block, the material-diverting slide plate can easily slide out of the chute and slide into the chute at the appropriate position when the first crushing roller rotates;

[0055] 3. By setting the knocking shaft, telescopic rod, knocking block, first magnetic block and second magnetic block, the screening mesh roller is easy to be vibrated, and a small number of unqualified sand and gravel particles in the screening mesh roller can be knocked and broken;

[0056] 4. By arranging the dust removal air duct, dust removal fan, dust removal bag and blowing pipe, the dust in the crushing box is easy to clean, and the sand and gravel pushed by the material-moving slide plate can impact the sand and gravel at the first crushing gap to perform impact crushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0058] Figure 2 It is a schematic diagram of the structure of the first crushing roller, the second crushing roller, the third crushing roller and the screening mesh roller;

[0059] Figure 3 It is a schematic diagram of the structure of the dust removal component and the drive component;

[0060] Figure 4 It is a structural diagram of the transmission part;

[0061] Figure 5 It is a structural diagram of the knocking component.

[0062] Description of reference numerals:

[0063] 1. Crushing box; 11. Feed hopper; 111. Cover plate; 112. Closing plate; 113. Torsion spring; 2. First crushing roller; 21. Slide; 22. Give way groove; 3. Second crushing roller; 31. First crushing gap; 4. Screening mesh roller; 41. Screening gap; 5. Return material assembly; 51. Material sliding plate; 52. First material guide plate; 53. Second material guide plate; 54. Transmission unit; 541. Retraction spring; 542. Return material push rod; 543. Retraction block; 544. Return material push block; 6. The third crushing roller; 61, the second crushing gap; 7, the knocking assembly; 71, the knocking shaft; 72, the telescopic rod; 73, the knocking block; 74, the first magnetic block; 75, the second magnetic block; 76, the support block; 8, the dust removal assembly; 81, the dust removal air duct; 82, the dust removal fan; 83, the dust removal bag; 84, the blow pipe; 9, the driving assembly; 91, the first gear; 92, the second gear; 93, the first motor; 94, the first pulley; 95, the second pulley; 96, the transmission belt; 97, the second motor. DETAILED DESCRIPTION

[0064] The following is combined with Figure 1-5 This application is described in further detail.

[0065] The present application embodiment discloses a sand and gravel crusher. Figure 1 and Figure 2 A sand and gravel crusher includes a crushing box 1, a first crushing roller 2, a second crushing roller 3, a screening mesh roller 4 and a return material assembly 5. The first crushing roller 2, the second crushing roller 3, the screening mesh roller 4 and the return material assembly 5 are all arranged in the crushing box 1. A first crushing gap 31 is formed between the first crushing roller 2 and the second crushing roller 3, and a screening gap 41 is formed between the screening mesh roller 4 and the first crushing roller 2. The return material assembly 5 is used to guide sand and gravel from the first crushing gap 31 to the screening gap 41, and to call back the sand and gravel at the screening gap 41 to fall back to the first crushing gap 31.

[0066] When in use, sand and gravel are poured into the first crushing gap 31, the first crushing roller 2 and the second crushing roller 3 crush the sand and gravel, the return material component 5 guides the sand and gravel to the screening gap 41, the screening mesh roller 4 screens the sand and gravel, and the return material component 5 returns the sand and gravel in the screening gap 41 to fall back into the first crushing gap 31, so that unqualified sand and gravel particles can automatically fall back into the first crushing gap 31, reducing the labor consumed in sand and gravel crushing.

[0067] Reference Figure 2The crushing box 1 is rectangular and vertically arranged. The first crushing roller 2 is arranged horizontally, and both ends of the axis direction are rotatably connected to the inner wall of the crushing box 1. The second crushing roller 3 is arranged horizontally, and both ends of the axis direction are rotatably connected to the inner wall of the crushing box 1. The second crushing roller 3 is arranged parallel to one side of the first crushing roller 2, and the first crushing roller 2 and the second crushing roller 3 are on the same horizontal plane. The first crushing gap 31 is located between the sides of the first crushing roller 2 and the second crushing roller 3 that are close to each other.

[0068] The screening mesh roller 4 is arranged horizontally, and both ends of the axis direction are rotatably connected to the inner wall of the crushing box 1. The screening mesh roller 4 is located on the discharge side of the first crushing gap 31 and is parallel to the first crushing roller 2. The screening mesh roller 4 is located below the first crushing roller 2. The screening gap 41 is located between the first crushing roller 2 and the side of the screening mesh roller 4 that are close to each other.

[0069] A third crushing roller 6 is arranged between the second crushing roller 3 and the screening mesh roller 4. The third crushing roller 6 is arranged horizontally, and both ends of the third crushing roller 6 in the axial direction are rotatably connected to the inner wall of the crushing box 1. The third crushing roller 6 is opposite to the first crushing gap 31. The third crushing roller 6 is parallel to the first crushing roller 2, and a second crushing gap 61 is formed between the side of the third crushing roller 6 close to the first crushing roller 2. The third crushing roller 6 is in contact with the screening mesh roller 4.

[0070] Reference Figure 1 and Figure 3 A driving assembly 9 is arranged outside the crushing box 1, and the driving assembly 9 includes a first gear 91, a second gear 92, a first motor 93, a first pulley 94, a second pulley 95, a transmission belt 96 and a second motor 97. The first gear 91 is coaxially fixedly connected to the first crushing roller 2, the second gear 92 is coaxially fixedly connected to the second crushing roller 3, the first gear 91 is meshed with the second gear 92, the first motor 93 is fixedly arranged on the side wall of the crushing box 1, and the output shaft of the first motor 93 is coaxially fixedly connected to the first gear 91.

[0071] The first pulley 94 is coaxially fixedly connected to the screening mesh roller 4 , the second pulley 95 is coaxially fixedly connected to the third crushing roller 6 , the transmission belt 96 is sleeved on the first pulley 94 and the second pulley 95 , the second motor 97 is fixedly connected to the crushing box 1 , and the output shaft of the second motor 97 is coaxially fixedly connected to the second pulley 95 .

[0072] Reference Figure 2 and Figure 4 The material return assembly 5 includes a material-discharging slide plate 51, a first material guide plate 52, a second material guide plate 53 and a transmission part 54. The material-discharging slide plate 51 is in the shape of a rectangular plate and is slidably arranged in a slide groove 21 opened on the side wall of the first crushing roller 2. The slide groove 21 is in the shape of a rectangle and its opening direction is the diameter direction of the first crushing roller 2. The sliding direction of the material-discharging slide plate 51 is the opening direction of the slide groove 21. The length direction of the material-discharging slide plate 51 is parallel to the axial direction of the first crushing roller 2.

[0073] Reference Figure 2 The first guide plate 52 is arranged between the second crushing roller 3 and the third crushing roller 6. The first guide plate 52 is in the shape of a rectangular plate and is curved in an arc shape. The length direction of the first guide plate 52 is parallel to the axial direction of the second crushing roller 3. Both sides of the first guide plate 52 in the length direction are respectively in contact with the second crushing roller 3 and the third crushing roller 6. Both ends of the first guide plate 52 in the length direction are fixedly connected to the inner wall of the crushing box 1. The first guide plate 52 is used to guide sand and gravel to the screening gap 41.

[0074] The second guide plate 53 is arranged on the screening mesh roller 4. The second guide plate 53 is in the shape of a rectangular plate and is curved in an arc shape. The length direction of the second guide plate 53 is parallel to the axial direction of the first crushing roller 2. One side of the second guide plate 53 is in contact with the screening mesh roller 4, and the other side is located on the feeding side of the first crushing gap 31. The axis of the second guide plate 53 coincides with the axis of the first crushing roller 2. Both ends of the second guide plate 53 in the length direction are fixedly connected to the inner wall of the crushing box 1. The second guide plate 53 is used to guide sand and gravel to the feeding side of the first crushing gap 31.

[0075] Reference Figure 2 and Figure 4 The transmission part 54 includes a retraction spring 541, a return material push rod 542, a retraction block 543 and a return material push block 544. There are multiple retraction springs 541, and they are all located between the material tapping slide 51 and the bottom of the slide groove 21. The multiple retraction springs 541 are arranged along the length direction of the material tapping slide 51. One end of the retraction spring 541 is fixedly connected to the material tapping slide 51, and the other end is fixedly connected to the bottom of the slide groove 21. The retraction spring 541 is used to drive the material tapping slide 51 to slide into the slide groove 21.

[0076] Reference Figure 4 The return material push rod 542 is in the shape of a round rod, and there are two of them. The two return material push rods 542 are respectively located at the two ends of the axis direction of the first crushing roller 2. The return material push rod 542 is slidably penetrated on the first crushing roller 2, and the sliding direction is consistent with the sliding direction of the material-diverting slide plate 51. One end of the return material push rod 542 penetrates into the slide groove 21 and is fixedly connected to the material-diverting slide plate 51. The other end of the return material push rod 542 penetrates into the make-way groove 22 opened at the end of the first crushing roller 2. The make-way groove 22 is circular and is coaxially opened with the first crushing roller 2.

[0077] Reference Figure 2 and Figure 4 The retraction block 543 is in the shape of a circular block and is provided with two retraction blocks 543. The two retraction blocks 543 are respectively located in the two make way grooves 22 in the axial direction of the first crushing roller 2. The retraction block 543 is fixedly connected to the inner wall of the crushing box 1 and is coaxially arranged with the make way groove 22.

[0078] Reference Figure 3 and Figure 4 The first crushing roller 2 rotates coaxially with the connecting shaft of the first gear 91 and is penetrated by the retraction block 543 .

[0079] Reference Figure 2 and Figure 4 There are two return material pushing blocks 544, which are respectively located in the two make way grooves 22. The return material pushing blocks 544 are in the shape of a rectangular block and are bent in a semicircular arc shape. The inner arc side of the return material pushing block 544 is attached to the outer wall of the retraction block 543. The return material pushing block 544 is fixedly connected to the retraction block 543. Both ends of the return material pushing block 544 and the side wall of the retraction block 543 are in arc transition. The connecting line of the two ends of the return material pushing block 544 is the tangent of the abutment between the third crushing roller 6 and the screening mesh roller 4.

[0080] One end of the return push rod 542 located in the clearance groove 22 abuts against the retraction block 543 or the return push block 544. Before the material-diverting slide plate 51 rotates to the first crushing gap 31, the retraction spring 541 drives the material-diverting slide plate 51 to slide into the slide groove 21; after the material-diverting slide plate 51 rotates to the second crushing gap 61, the return push block 544 drives the material-diverting slide plate 51 to slide out of the slide groove 21.

[0081] When in use, the first motor 93 and the second motor 97 are started, the first motor 93 drives the first crushing roller 2 and the second crushing roller 3 to rotate in the opposite direction through the first gear 91 and the second gear 92, the second motor 97 drives the third crushing roller 6 and the screening mesh roller 4 to rotate in the same direction through the second pulley 95, the transmission belt 96 and the first pulley 94, and the third crushing roller 6 rotates in the opposite direction to the first crushing roller 2, and the sand and gravel are poured into the first crushing gap 31, the first crushing roller 2 and the second crushing roller 3 perform the first crushing on the sand and gravel, the first guide plate 52 guides the sand and gravel to the screening gap 41, when the sand and gravel pass through the second crushing gap 61, the first crushing roller 2 and the third crushing roller 6 perform the second crushing on the sand and gravel, the screening mesh roller 4 screens the sand and gravel flowing to the screening gap 41, the qualified sand and gravel particles pass through the screening mesh roller 4 and fall to the bottom of the crushing box 1, and the unqualified sand and gravel particles remain in the screening gap 41.

[0082] After the material-dividing slide 51 rotates to the second crushing gap 61, the return material push rod 542 abuts against the return material push block 544, and the return material push block 544 pushes the material-dividing slide 51 to slide out of the chute 21 through the return material push rod 542. The material-dividing slide 51 shifts the unqualified sand and gravel particles at the screening gap 41 into between the second guide plate 53 and the first crushing roller 2. The material-dividing slide 51 shifts the unqualified sand and gravel along the second guide plate 53 to fall back to the first crushing gap 31, so that the unqualified sand and gravel particles can automatically fall back to the first crushing gap 31, reducing the labor consumed in sand and gravel crushing. Before the material-dividing slide 51 rotates to the first crushing gap 31, the retraction spring 541 drives the material-dividing slide 51 to slide into the chute 21, and makes the return material push rod 542 abut against the retraction block 543.

[0083] Reference Figure 2 and Figure 5 A knocking assembly 7 is provided on the screening mesh roller 4, and the knocking assembly 7 includes a knocking shaft 71, a telescopic rod 72, a knocking block 73, a first magnetic block 74, a second magnetic block 75 and a supporting block 76. The knocking shaft 71 is coaxially fixed in the screening mesh roller 4, and is rotatably penetrated on the rodless cavity of the telescopic rod 72. The telescopic rod 72 is located in the middle of the knocking shaft 71, and the knocking block 73 is fixed on the movable end of the telescopic rod 72. The knocking block 73 is in a rectangular block shape, and the length direction is parallel to the axial direction of the screening mesh roller 4. The knocking block 73 pulls the telescopic rod 72 under the action of gravity to always be in a vertical state, and the side of the knocking block 73 away from the telescopic rod 72 is in an arc shape that matches the inner side wall of the screening mesh roller 4.

[0084] Reference Figure 5 The first magnetic block 74 is in a rectangular block shape and is located in the rodless cavity of the telescopic rod 72. The first magnetic block 74 is fixed to the movable end of the telescopic rod 72. The second magnetic block 75 is in a rectangular block shape and is located in the rodless cavity of the telescopic rod 72 and is embedded on one side of the knocking shaft 71. The exposed side of the second magnetic block 75 is flush with the side wall of the knocking shaft 71. When the first magnetic block 74 and the second magnetic block 75 are in a facing state, the polarities of the first magnetic block 74 and the second magnetic block 75 on the side close to each other are opposite.

[0085] Reference Figure 2 The support block 76 is located in the crushing box 1 and is fixedly connected to the crushing box 1. The support block 76 is in a rectangular block shape and is located directly below the screening mesh roller 4. The length direction of the support block 76 is parallel to the axial direction of the screening mesh roller 4. The top surface of the support block 76 abuts against the outer wall of the screening mesh roller 4. The top surface of the support block 76 is fitted with the outer wall of the screening mesh roller 4, and the support block 76 is opposite to the knocking block 73.

[0086] When in use, the screening mesh roller 4 drives the knocking shaft 71 to rotate, and the knocking shaft 71 drives the second magnetic block 75 to rotate. When the second magnetic block 75 is opposite to the first magnetic block 74, the second magnetic block 75 attracts the first magnetic block 74 to move upward to shrink the telescopic rod 72, and the telescopic rod 72 drives the knocking block 73 to rise. When the second magnetic block 75 rotates away from the first magnetic block 74, the magnetic attraction of the second magnetic block 75 to the first magnetic block 74 is released, and the knocking block 73 falls freely and knocks on the screening mesh roller 4, so that the screening mesh roller 4 is subjected to knocking vibration. At the same time, the knocking block 73 knocks on a small number of unqualified sand and gravel particles in the screening mesh roller 4 to knock and break the sand and gravel particles.

[0087] Reference Figure 3 A dust removal assembly 8 is provided on the outer wall of the crushing box 1, and the dust removal assembly 8 includes a dust removal air duct 81, a dust removal fan 82 and a dust removal bag 83. The dust removal air duct 81 is in a rectangular tube shape, one end of the dust removal air duct 81 is connected to the side wall of the crushing box 1, and is directly opposite to the side wall of the screening mesh roller 4, and the other end of the dust removal air duct 81 is connected to the air inlet of the dust removal fan 82. The dust removal bag 83 is in a rectangular bag shape and is fixed in the dust removal air duct 81, and the bag opening of the dust removal bag 83 faces the screening mesh roller 4.

[0088] The air outlet of the dust removal fan 82 is connected to the blowing pipe 84 through a pipeline. The blowing pipe 84 is in the shape of a rectangular tube. The blowing pipe 84 is located at the top of the crushing box 1, and the end away from the dust removal fan 82 is fixedly penetrated on the second guide plate 53, and the pipe mouth of the blowing pipe 84 faces the second crushing roller 3.

[0089] Reference Figure 2 and Figure 3 The top of the crushing box 1 is connected to a feed hopper 11, and the connection between the feed hopper 11 and the crushing box 1 is opposite to the first crushing gap 31. The feed hopper 11 is in an inverted trapezoidal shape, and the length direction is parallel to the axial direction of the first crushing roller 2. The two inclined side walls of the feed hopper 11 are projected onto the first crushing roller 2 and the second crushing roller 3 respectively. The inclined side wall of the feed hopper 11 projected onto the second crushing roller 3 is set at an angle to the pipe opening of the blowing pipe 84 at one end inside the crushing box 1.

[0090] Reference Figure 1 and Figure 3The mouth of the feed hopper 11 is provided with a cover plate 111 and a closing plate 112, both of which are in the shape of rectangular plates. One side of the cover plate 111 in the length direction is hinged to the inclined side wall of the feed hopper 11 projected on the first crushing roller 2, and one side of the closing plate 112 in the length direction is fixed to the inclined side wall of the feed hopper 11 projected on the second crushing roller 3. The whole formed by the cover plate 111 and the closing plate 112 is adapted to the mouth of the feed hopper 11. Two torsion springs 113 are provided at the hinge between the cover plate 111 and the inclined side wall of the feed hopper 11. The two torsion springs 113 are respectively located at the two ends of the cover plate 111 in the length direction. One end of the torsion spring 113 is fixedly connected to the cover plate 111, and the other end is fixedly connected to the inclined side wall of the feed hopper 11. The torsion spring 113 is used to drive the cover plate 111 to close the mouth of the feed hopper 11.

[0091] When in use, the dust removal fan 82 is started, and the dust removal fan 82 sucks the dust in the crushing box 1 from the screening mesh roller 4, and the dust removal bag 83 filters the dust to clean the dust in the crushing box 1; the dust removal fan 82 blows the filtered air from the blowing pipe 84 to the second crushing roller 3, and the wind blows out from the blowing pipe 84 and carries the unqualified sand and gravel particles moved by the material-moving slide plate 51, and the wind carries the sand and gravel particles to the second crushing roller 3; the sand and gravel are poured onto the cover plate 111, and the sand and gravel squeeze the cover plate 111 to rotate and flow into In the feed hopper 11, the cover plate 111 guides the sand and gravel to the inclined side wall of the feed hopper 11 projected on the second crushing roller 3, so that the sand and gravel flow into the first crushing gap 31 along the inclined side wall of the feed hopper 11 projected on the second crushing roller 3, and the sand and gravel particles carried by the wind impact on the added sand and gravel to carry out impact crushing; after the sand and gravel are added, the cover plate 111 is closed at the mouth of the feed hopper 11 under the elastic force of the torsion spring 113 to close the feed hopper 11, so that the dust in the crushing box 1 is not easy to dissipate.

[0092] The implementation principle of a sand and gravel crusher in an embodiment of the present application is: when in use, start the first motor 93, the second motor 97 and the dust removal fan 82, the first motor 93 drives the first crushing roller 2 and the second crushing roller 3 to rotate, the second motor 97 drives the third crushing roller 6 and the screening mesh roller 4 to rotate, and the dust removal fan 82 sucks the dust in the crushing box 1 into the dust removal bag 83 to clean the dust in the crushing box 1.

[0093] Pour the sand and gravel onto the cover plate 111, the sand and gravel squeeze the cover plate 111 to rotate, and flow from the feed hopper 11 to the first crushing gap 31, and under the guidance of the first guide plate 52, the sand and gravel flow through the second crushing gap 61 to the screening gap 41, the first crushing roller 2 and the second crushing roller 3 crush the sand and gravel for the first time, the first crushing roller 2 and the third crushing roller 6 crush the sand and gravel for the second time, the screening mesh roller 4 screens the sand and gravel, and the qualified sand and gravel particles fall to the bottom of the crushing box 1 through the screening mesh roller 4, and the unqualified sand and gravel particles remain in the screening gap 41.

[0094] When the material-diverting slide 51 rotates to the second crushing gap 61 , the return push block 544 drives the material-diverting slide 51 to slide out of the chute 21 , and the material-diverting slide 51 drives the unqualified sand and gravel particles to fall back to the first crushing gap 31 along the second material guide plate 53 .

[0095] The dust removal fan 82 blows wind from the blowing pipe 84 toward the second crushing roller 3, and the wind carries unqualified sand and gravel particles to impact the added sand and gravel to perform impact crushing.

[0096] The screening mesh roller 4 drives the knocking block 73 to cyclically knock on the screening mesh roller 4 through the knocking shaft 71, the second magnetic block 75 and the first magnetic block 74, so that the screening mesh roller 4 is subjected to knocking vibration, and a small amount of unqualified sand and gravel in the screening mesh roller 4 is knocked and broken.

[0097] Therefore, unqualified sand and gravel particles are automatically moved back to the first crushing gap 31 by the material moving slide plate 51, thereby reducing the labor consumed in crushing sand and gravel.

[0098] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sand and gravel crusher, characterized in that: include: Crushing box (1); A first crushing roller (2) is rotatably connected to the crushing box (1); The second crushing roller (3) is rotatably connected to the crushing box (1) and is arranged in parallel on one side of the first crushing roller (2), and a first crushing gap (31) is formed between the sides of the first crushing roller (2) and the second crushing roller (3) that are close to each other; A screening mesh roller (4) is rotatably connected to the crushing box (1) and is located on the discharge side of the first crushing gap (31). The screening mesh roller (4) is parallel to the first crushing roller (2) and forms a screening gap (41) between the side close to the first crushing roller (2); A material return assembly (5) comprises a material shifting slide plate (51), a first material guide plate (52), a second material guide plate (53) and a transmission part (54); in, The material-moving slide plate (51) is slidably arranged in a slide groove (21) provided on the side wall of the first crushing roller (2); The first guide plate (52) is arranged between the second crushing roller (3) and the screening mesh roller (4), the first guide plate (52) is fixedly connected to the crushing box (1), and is used to guide sand and gravel to the screening gap (41); The second guide plate (53) is arranged on the screening mesh roller (4), one side of the second guide plate (53) is in contact with the screening mesh roller (4), the second guide plate (53) is fixedly connected to the crushing box (1), and is used to guide sand and gravel to one side of the first crushing gap (31) for feeding; The transmission part (54) is arranged on the first crushing roller (2) and is used to alternately drive the material-selecting slide plate (51) to slide into the slide groove (21) and slide out of the slide groove (21) by means of the driving force generated by the rotation of the first crushing roller (2); When the material-shifting slide plate (51) rotates to the first crushing gap (31), the transmission part (54) drives the material-shifting slide plate (51) to slide into the slide groove (21); When the material-diverting slide plate (51) rotates to before the screening gap (41), the transmission part (54) drives the material-diverting slide plate (51) to slide out of the slide groove (21).

2. A sand and stone crusher according to claim 1, characterized in that: The transmission part (54) comprises: A retraction spring (541) is disposed between the material-diverting slide plate (51) and the bottom of the slide groove (21) and is used to drive the material-diverting slide plate (51) to slide into the slide groove (21); A material return push rod (542) is slidably mounted on the first crushing roller (2), one end of the material return push rod (542) is inserted into the slide groove (21) and is fixedly connected to the material shifting slide plate (51), and the other end of the material return push rod (542) is inserted into a clearance groove (22) provided at the end of the first crushing roller (2); The retracting block (543) is located in the clearance groove (22) and is fixedly connected to the crushing box (1); The return material pushing block (544) is located in the clearance groove (22) and is fixed on the side wall of the retracting block (543). Both ends of the return material pushing block (544) and the side wall of the retracting block (543) are circularly transitioned; One end of the return material push rod (542) located in the clearance groove (22) abuts against the retraction block (543) or the return material push block (544).

3. A sand and stone crusher according to claim 1, characterized in that: A third crushing roller (6) is arranged between the second crushing roller (3) and the screening mesh roller (4); the third crushing roller (6) is rotatably connected to the crushing box (1) and is directly opposite to the first crushing gap (31); the third crushing roller (6) is parallel to the first crushing roller (2), and a second crushing gap (61) is formed between the third crushing roller (6) and the side close to the first crushing roller (2); the third crushing roller (6) is in contact with the screening mesh roller (4); The first material guide plate (52) is located between the second crushing roller (3) and the third crushing roller (6), and its two sides are respectively in contact with the second crushing roller (3) and the third crushing roller (6). When the material-diverting slide plate (51) rotates to the second crushing gap (61), the transmission part (54) drives the material-diverting slide plate (51) to slide out of the slide groove (21).

4. A sand and stone crusher according to claim 1, characterized in that: The screening mesh roller (4) is provided with a knocking assembly (7), and the knocking assembly (7) comprises a knocking shaft (71), a telescopic rod (72), a knocking block (73), a first magnetic block (74) and a second magnetic block (75); The knocking shaft (71) is coaxially fixed in the screening net roller (4) and rotatably penetrates the rodless cavity of the telescopic rod (72). The knocking block (73) is fixed on the movable end of the telescopic rod (72). The first magnetic block (74) is located in the rodless cavity of the telescopic rod (72) and is fixed to the movable end of the telescopic rod (72). The second magnetic block (75) is located in the rodless cavity of the telescopic rod (72) and is embedded in one side of the knocking shaft (71). When the first magnetic block (74) and the second magnetic block (75) are in a facing state, the polarities of the first magnetic block (74) and the second magnetic block (75) on the side close to each other are opposite.

5. A sand and stone crusher according to claim 4, characterized in that: The knocking assembly (7) also includes a support block (76), which is located in the crushing box (1) and is fixedly connected to the crushing box (1). The support block (76) abuts against the outer wall of the screening mesh roller (4) and is arranged in close contact with the outer wall of the screening mesh roller (4). The support block (76) is directly opposite to the knocking block (73).

6. A sand and stone crusher according to claim 1, characterized in that: A dust removal assembly (8) is arranged on the outer wall of the crushing box (1), and the dust removal assembly (8) comprises a dust removal air duct (81), a dust removal fan (82) and a dust removal bag (83). One end of the dust removal air duct (81) is connected to the side wall of the crushing box (1) and is directly opposite to the screening mesh roller (4), and the other end of the dust removal air duct (81) is connected to the air inlet of the dust removal fan (82). The dust removal bag (83) is fixedly arranged in the dust removal air duct (81), and the bag opening faces the screening mesh roller (4).

7. A sand and stone crusher according to claim 6, characterized in that: The air outlet of the dust removal fan (82) is connected to a blowing pipe (84), which is located in the crushing box (1) and has one end fixedly penetrated on the second material guide plate (53), with the pipe opening of the blowing pipe (84) facing the second crushing roller (3).

8. A sand and stone crusher according to claim 7, characterized in that: The top end of the crushing box (1) is connected to a feed hopper (11), and the connection point between the feed hopper (11) and the crushing box (1) is directly opposite to the first crushing gap (31).

9. A sand and stone crusher according to claim 8, characterized in that: The feed hopper (11) is in an inverted trapezoidal shape. The two inclined side walls of the feed hopper (11) are respectively projected onto the first crushing roller (2) and the second crushing roller (3). The mouth of the feed hopper (11) is provided with a cover plate (111) and a closing plate (112). The cover plate (111) is hinged to the inclined side wall of the feed hopper (11) projected onto the first crushing roller (2). The closing plate (112) is fixed to the inclined side wall of the feed hopper (11) projected onto the second crushing roller (3). The cover plate (111) and the closing plate (112) form a whole that is adapted to the mouth of the feed hopper (11). A torsion spring (113) is provided at the hinge between the cover plate (111) and the inclined side wall of the feed hopper (11). The torsion spring (113) is used to drive the cover plate (111) to close the mouth of the feed hopper (11).

10. A sand and stone crusher according to claim 3, characterized in that: A driving assembly (9) is arranged outside the crushing box (1), and the driving assembly (9) comprises a first gear (91), a second gear (92), a first motor (93), a first pulley (94), a second pulley (95), a transmission belt (96) and a second motor (97); the first gear (91) is coaxially fixedly connected to the first crushing roller (2), the second gear (92) is coaxially fixedly connected to the second crushing roller (3), the first gear (91) is meshed with the second gear (92), the first motor (93) is fixedly arranged on the side wall of the crushing box (1), and the output shaft of the first motor (93) is coaxially fixedly connected to the first gear (91); The first pulley (94) is coaxially fixedly connected to the screening mesh roller (4), the second pulley (95) is coaxially fixedly connected to the third crushing roller (6), the transmission belt (96) is sleeved on the first pulley (94) and the second pulley (95), the second motor (97) is fixedly connected to the crushing box (1), and the output shaft of the second motor (97) is coaxially fixedly connected to the second pulley (95).

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