Crawler-type gravel screening machine for dry-type sand making

Abstract

The invention relates to the technical field of gravel screening machines, and discloses a dry-type sand-making crawler-type gravel screening machine which comprises a screening box, a box door is difficult to be arranged on the front face of the screening box, an L-shaped plate is fixedly connected to the back of the screening box, and a screening mechanism, a discharging mechanism and a dust removal mechanism are arranged in the screening box. A discharging plate is fixedly connected to the interior of the screening box, the discharging plate is obliquely arranged, the left portion of the discharging plate is high, the right portion of the discharging plate is low, the discharging plate is used for discharging, the screening mechanism comprises a motor and a first rotating rod, the motor is fixedly connected to the front face of an L-shaped plate, and the first rotating rod is fixedly connected to the output end of the motor through a coupler. According to the screening device, the second connecting rod drives the first screening plate to move in a reciprocating mode, the first knocking rod is used for knocking the second screening plate, the screening speed of the first screening plate and the second screening plate can be increased, and the screening efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sand and gravel screening machines, in particular to a crawler-type sand and gravel screening machine for dry sand making. Background Art

[0002] The process of separating bulk materials into different particle sizes through one or more screens is called screening. Screening machines use the relative movement between bulk materials and the screen surface to allow some particles to pass through the screen holes, thereby separating sand, gravel, crushed stone and other materials into different grades according to particle size. Sand and gravel screening machines used in ore mining are generally divided into plate mesh screening machines and drum screening machines. According to a Chinese patent application number "CN202410105808.X", a crawler-type sand and gravel screening machine is disclosed, which relates to the field of screening technology, including a crawler-type walking assembly, on which a body is fixedly mounted through a bracket, a feed port is provided on the top of the body, and a discharge port is provided on the bottom of the body; a screening assembly is rotatably mounted inside the body, and the screening assembly includes two end plates parallel to each other, and horizontal shafts that cooperate with the rotation of the body are fixedly mounted on the two end plates; a number of sieve plates arranged in a ring are evenly arranged between the two end plates, and the sieve plates cooperate with the end plates for rotation; the screening assembly also includes a control unit, and the control unit is used to control the angle of the sieve plate relative to the end plate. The present invention screens sand and gravel through the gap between adjacent screen plates; the screen plate enters a vertical state when it orbits to the upper position of its stroke, so that the area between the adjacent screen plates is in an open state, and the end plate does not need to stop rotating, and the sand and gravel to be screened can also enter the screening working area corresponding to the end plate. When in use, a single screening process is likely to lead to too low screening efficiency, and the screening efficiency needs to be further improved. Therefore, a dry sand making crawler sand and gravel screening machine is proposed to solve the above-mentioned problems. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a crawler-type sand and gravel screening machine for dry sand making in view of the deficiencies in the above-mentioned prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a crawler type sand and gravel screening machine for dry sand making, comprising a screening box, the front of the screening box is relatively difficult to have a box door, the back of the screening box is fixedly connected to an L-shaped plate, the interior of the screening box is provided with a screening mechanism, a feeding mechanism, and a dust removal mechanism, the interior of the screening box is fixedly connected to a feeding plate, the feeding plate is inclined, and the left is higher than the right, and the feeding plate is provided for feeding, the screening mechanism comprises a motor and a first rotating rod, the motor is fixedly connected to the front of the L-shaped plate, the first rotating rod is fixedly connected to the output end of the motor through a coupling, the motor is provided to drive the first rotating rod to rotate, and the first rotating rod is away from the motor The first end is fixedly connected to a first connecting rod, a first rotating rod is provided for driving the first connecting rod to rotate, the front side of the first connecting rod is rotatably connected to a second connecting rod, the first connecting rod is provided for driving the second connecting rod to rotate, the interior of the screening box is fixedly connected to a fixed rod, the outer wall of the fixed rod is provided with a first sliding sleeve, the back of the first sliding sleeve is fixedly connected to a first screen plate, the first sliding sleeve is provided for driving the first screen plate to move, the first screen plate is provided for screening sand and gravel, the top of the first screen plate is fixedly connected to a first vertical plate, the end of the second connecting rod away from the first connecting rod is rotatably connected to the back of the first vertical plate, the second connecting rod is provided for driving the first screen plate to move left and right.

[0005] Preferably, a first vertical rod is fixedly connected to the inner bottom side of the screening box, a spring is sleeved on the outer wall of the first vertical rod, a second sliding sleeve is sleeved on the outer wall of the first vertical rod, the spring is arranged between the bottom of the second sliding sleeve and the inner top of the screening box, a second screen plate is fixedly connected to the back of the second sliding sleeve, a spring is arranged for limiting the second sliding sleeve, the second screen plate is arranged for screening sand and gravel, the sieve holes of the first sieve plate and the second sieve plate are of different sizes, and the sieve holes of the first sieve plate are larger than the sieve holes of the second sieve plate.

[0006] Preferably, the left side of the screening box is fixedly connected to a fixed plate, the top of the fixed plate is rotatably connected to a second rotating rod through a bearing, the top of the second rotating rod is fixedly connected to a first reciprocating screw rod, the second rotating rod is provided to drive the first reciprocating screw rod to rotate, the outer wall of the first reciprocating screw rod is slidably connected to a first thread sleeve, the first reciprocating screw rod is provided to drive the first thread sleeve to move, the top of the first thread sleeve is fixedly connected to a first knocking rod, the front of the first thread sleeve is fixedly connected to a limiting block, the limiting block is slidably connected to the inner wall of the slide groove, and the limiting block is provided to limit the first thread sleeve.

[0007] Preferably, a third rotating rod is fixedly connected to the top of the first reciprocating screw rod, and the outer wall fixing sleeve of the third rotating rod is provided with a second bevel gear, and the third rotating rod is provided to drive the first bevel gear to rotate, and the outer wall fixing sleeve of the first rotating rod is provided with a first bevel gear, the first bevel gear is meshed with the second bevel gear, and the first bevel gear is provided to drive the second bevel gear to rotate.

[0008] The top of the first rotary table is connected with a third connecting rod through a ball rotation, and the first rotary table is connected with a fourth connecting rod through a ball rotation. The third connecting rod is connected with the third connecting rod at an end away from the first rotary table and is connected with the second rotary table through a ball rotation. The third connecting rod is used to drive the second rotary table to move up and down. The top of the second rotary table is fixedly connected with a connecting plate, and the top of the connecting plate is fixedly connected with a second knocking rod, and the second rotating disk is used to drive the second knocking rod on the top of the connecting plate to move up and down. The second knocking rod is used to knock the blanking plate, so that sand and gravel stick to the blanking plate, resulting in accumulation and difficulty in blanking.

[0009] Preferably, a second vertical rod is fixedly connected to the inner bottom side of the screening box, and a third sliding sleeve is sleeved on the outer wall of the second vertical rod. The third sliding sleeve is fixedly connected to the front side of the second turntable, and the third sliding sleeve is provided to facilitate the second turntable to slide up and down.

[0010] Preferably, the crushing mechanism includes a fifth rotating rod, which is rotatably connected to the inner wall of the screening box through a bearing, the fifth rotating rod movably passes through the screening box and extends outward, the outer wall of the fifth rotating rod is fixedly connected to the third gear, and the fifth rotating rod is provided to drive the third gear to rotate, the fifth rotating rod is connected to the first rotating rod through a pulley group, the first rotating rod is provided to drive the fifth rotating rod to rotate, the outer wall of the fifth rotating rod is fixedly connected to the first crushing roller, the fifth rotating rod is provided to drive the first crushing roller to rotate, and the first crushing roller is provided to crush sand and gravel.

[0011] Preferably, the inner wall of the screening box is rotatably connected to a sixth rotating rod through a bearing, the sixth rotating rod movably passes through the screening box and extends to the outside thereof, the outer wall of the sixth rotating rod is fixedly connected to a second crushing roller, the sixth rotating rod is provided to drive the second crushing roller and the fourth gear to rotate, the outer wall of the sixth rotating rod is fixedly connected to a fourth gear, the third gear is meshed with the fourth gear, the third gear is provided to drive the fourth gear to rotate, and the second crushing roller is provided to crush sand and gravel.

[0012] Preferably, the dust removal mechanism includes a second vertical plate, the second vertical plate is fixedly connected to the bottom of the first screen plate, and the front of the first screen plate is fixedly connected to a first vacuum cleaner and a second vacuum cleaner, and the first vacuum cleaner and the second vacuum cleaner are provided to vacuum the dust of sand and gravel.

[0013] Preferably, a support leg is fixedly connected to the bottom of the screening box, and the support leg is provided to support the screening box. The number of the support legs is four, and the four support legs are fixedly connected around the bottom of the screening box. A conveyor belt is provided on the right side of the screening box, and the conveyor belt is provided to convey sand and gravel.

[0014] The present invention adopts the above technical solution, which can bring the following beneficial effects: 1. A crawler sand and gravel screening machine for dry sand making, through a motor, a first rotating rod, a first connecting rod, a second connecting rod, a fixed rod, a first sliding sleeve, a first screen plate, a first bevel gear, a second rotating rod, a first reciprocating screw rod, a third rotating rod, a first threaded sleeve, a first knocking rod, a limit block, a first vertical rod, a second sliding sleeve, a spring, a second screen plate, and a second bevel gear, the first screen plate is driven to reciprocate by the second connecting rod, and the first knocking rod is used to knock the second screen plate, so that the screening rate of the first screen plate and the second screen plate can be accelerated, and the screening efficiency is improved.

[0015] 2. This crawler sand and gravel screening machine for dry sand making, through the fourth rotating rod, the first rotating disk, the third connecting rod, the second rotating disk, the connecting plate, the second knocking rod, the second vertical rod, and the third sliding sleeve, can knock the unloading plate through the up and down movement of the second knocking rod to avoid the accumulation of sand and gravel on the unloading plate, which makes it difficult to unload.

[0016] 3. This dry sand making crawler sand and gravel screening machine uses the fifth rotating rod, the third gear, the first crushing roller, the sixth rotating rod, the fourth gear, the second crushing roller, and the first crushing roller and the second crushing roller to crush the sand and gravel, and can perform preliminary crushing of large sand and gravel.

[0017] 4. The crawler-type sand and gravel screening machine for dry sand making can absorb dust through the second vertical plate, the first vacuum cleaner and the second vacuum cleaner to achieve dust reduction treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the present invention; Figure 2 It is a back view of the present invention; Figure 3 is a cross-sectional view of the present invention; Figure 4 It is an enlarged view of point A of the present invention; Figure 5 It is an enlarged view of B of the present invention; Figure 6 It is an enlarged view of point C of the present invention; Figure 7 It is an enlarged view of D of the present invention.

[0019] In the figure: 1, screening box; 2, box door; 3, L-shaped plate; 4, screening mechanism; 411, motor; 412, first rotating rod; 413, first connecting rod; 414, second connecting rod; 415, fixing rod; 416, first sliding sleeve; 417, first screen plate; 418, first bevel gear; 419, second rotating rod; 420, first reciprocating screw rod; 421, third rotating rod; 422, first screw sleeve; 423, first knocking rod; 424, stop block; 425, first vertical rod; 426, second sliding sleeve; 427, spring; 428, second screen plate; 429, second bevel gear ; 5. unloading mechanism; 511. fourth rotating rod; 512. first rotating disk; 513. third connecting rod; 514. second rotating disk; 515. connecting plate; 516. second knocking rod; 517. second vertical rod; 518. third sliding sleeve; 6. crushing mechanism; 611. fifth rotating rod; 612. third gear; 613. first crushing roller; 614. sixth rotating rod; 615. fourth gear; 616. second crushing roller; 7. unloading plate; 8. dust removal mechanism; 811. second vertical plate; 812. first vacuum cleaner; 813. second vacuum cleaner; 9. supporting legs; 10. conveyor track. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "setting" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0024] See also Figure 1-7, one embodiment of the present invention is: a crawler type sand and gravel screening machine for dry sand making, comprising a screening box 1, the front of the screening box 1 is relatively difficult to have a box door 2, the back of the screening box 1 is fixedly connected to an L-shaped plate 3, the interior of the screening box 1 is provided with a screening mechanism 4, a feeding mechanism 5, and a dust removal mechanism 8, the interior of the screening box 1 is fixedly connected to a feeding plate 7, the feeding plate 7 is tilted, and the left is higher than the right, and the feeding plate 7 is provided for feeding, the screening mechanism 4 comprises a motor 411 and a first rotating rod 412, the motor 411 is fixedly connected to the front of the L-shaped plate 3, the first rotating rod 412 is fixedly connected to the output end of the motor 411 through a coupling, the motor 411 is provided to drive the first rotating rod 412 to rotate, and the first rotating rod 412 is away from the motor 411 The first end of the screening box 1 is fixedly connected to a first connecting rod 413, a first rotating rod 412 is provided for driving the first connecting rod 413 to rotate, the front of the first connecting rod 413 is rotatably connected to the second connecting rod 414, the first connecting rod 413 is provided for driving the second connecting rod 414 to rotate, the interior of the screening box 1 is fixedly connected to a fixing rod 415, the outer wall of the fixing rod 415 is sleeved with a first sliding sleeve 416, the back of the first sliding sleeve 416 is fixedly connected to a first sieve plate 417, the first sliding sleeve 416 is provided for driving the first sieve plate 417 to move, the first sieve plate 417 is provided for screening sand and gravel, the top of the first sieve plate 417 is fixedly connected to a first vertical plate, and one end of the second connecting rod 414 away from the first connecting rod 413 is rotatably connected to the first A second connecting rod 414 is provided on the back of a vertical plate to drive the first screen plate 417 to move left and right. A first vertical rod 425 is fixedly connected to the inner bottom side of the screening box 1. A spring 427 is provided on the outer wall of the first vertical rod 425. A second sliding sleeve 426 is provided on the outer wall of the first vertical rod 425. The spring 427 is provided between the bottom of the second sliding sleeve 426 and the inner top of the screening box 1. A second screen plate 428 is fixedly connected to the back of the second sliding sleeve 426. A spring 427 is provided to limit the second sliding sleeve 426. The second screen plate 428 is provided to screen sand and gravel. The sieve holes of the first sieve plate 417 and the second sieve plate 428 are of different sizes, and the sieve holes of the first sieve plate 417 are larger than the sieve holes of the second sieve plate 428. The left side of the screening box 1 A fixed plate is fixedly connected, and a second rotating rod 419 is rotatably connected to the top of the fixed plate through a bearing. A first reciprocating screw rod 420 is fixedly connected to the top of the second rotating rod 419. The second rotating rod 419 is provided to drive the first reciprocating screw rod 420 to rotate. A first wire sleeve 422 is slidably connected to the outer wall of the first reciprocating screw rod 420. The first reciprocating screw rod 420 is provided to drive the first wire sleeve 422 to move. A first knocking rod 423 is fixedly connected to the top of the first wire sleeve 422. A limiting block 424 is fixedly connected to the front of the first wire sleeve 422. The limiting block 424 is slidably connected to the inner wall of the slide groove. The limiting block 424 is provided to limit the first wire sleeve 422. A third rotating rod 421 is fixedly connected to the top of the first reciprocating screw rod 420.The outer wall fixed sleeve of the third rotating rod 421 is provided with a second bevel gear 429, and the third rotating rod 421 is provided to drive the second bevel gear 429 to rotate. The outer wall fixed sleeve of the first rotating rod 412 is provided with a first bevel gear 418, and the first bevel gear 418 is meshed with the second bevel gear 429, and the first bevel gear 418 is provided to drive the second bevel gear 429 to rotate.

[0025] Working principle: start the motor 411, the motor 411 drives the first rotating rod 412 to rotate, when the first rotating rod 412 rotates, it drives the first connecting rod 413 to rotate, when the first connecting rod 413 rotates, it drives the second connecting rod 414 to rotate, when the second connecting rod 414 rotates, it drives the first sieve plate 417 to move, so that the sand and gravel on the top of the first sieve plate 417 can be screened, when the first rotating rod 412 rotates, it drives the first bevel gear 418 to rotate, the first bevel gear 418 drives the second bevel gear 418 to rotate, and the first bevel gear 418 drives the second bevel gear 418 to rotate. The bevel gear 429 rotates, and when the second bevel gear 429 rotates, it drives the third rotating rod 421 inside to rotate. When the third rotating rod 421 rotates, it drives the first reciprocating screw rod 420 at the bottom to rotate. When the first reciprocating screw rod 420 rotates, it drives the first wire sleeve 422 to move. When the first wire sleeve 422 moves, it drives the first knocking rod 423 to move. The first knocking rod 423 is used to knock the second screen plate 428, so that the screening rate of the second screen plate 428 can be accelerated, and the screening efficiency is improved.

[0026] See also Figure 1-7On the basis of the above embodiment, in another embodiment of the present invention, the unloading mechanism 5 includes a fourth rotating rod 511, which is rotatably connected to the bottom side of the inner wall of the screening box 1 through a bearing, and the fourth rotating rod 511 is connected to the second rotating rod 419 through a pulley group, and the second rotating rod 419 is provided to drive the fourth rotating rod 511 to rotate, and the top of the fourth rotating rod 511 is fixedly connected to the first rotating disk 512, and the fourth rotating rod 511 is provided to drive the first rotating disk 512 to rotate, and the top of the first rotating disk 512 is rotatably connected to the third connecting rod 513 through a ball, and the first rotating disk 512 is provided to drive the third connecting rod 513 to rotate, and the end of the third connecting rod 513 away from the first rotating disk 512 is rotatably connected to the second rotating disk through a ball. The second rotating disk 514 is provided with a third connecting rod 513 for driving the second rotating disk 514 to move up and down. The top of the second rotating disk 514 is fixedly connected with a connecting plate 515. The top of the connecting plate 515 is fixedly connected with a second knocking rod 516. The second rotating disk 514 is provided with a second knocking rod 516 for driving the second knocking rod 516 on the top of the connecting plate 515 to move up and down. The second knocking rod 516 is provided for knocking the unloading plate 7 to prevent sand and gravel from sticking to the unloading plate 7 and causing accumulation and difficulty in unloading. The inner bottom side of the screening box 1 is fixedly connected with a second vertical rod 517. The outer wall of the second vertical rod 517 is provided with a third sliding sleeve 518. The third sliding sleeve 518 is fixedly connected to the front side of the second rotating disk 514. The third sliding sleeve 518 is provided to facilitate the second rotating disk 514 to slide up and down.

[0027] Working principle: when the first reciprocating screw rod 420 rotates, it drives the second rotating rod 419 at the bottom to rotate. When the second rotating rod 419 rotates, the fourth rotating rod 511 is driven to rotate through the pulley group. When the fourth rotating rod 511 rotates, it drives the first rotating disk 512 to rotate. When the first rotating disk 512 rotates, it drives the third connecting rod 513 to rotate. When the third connecting rod 513 rotates, it drives the second rotating disk 514 to rotate. When the third connecting rod 513 rotates, the second rotating disk 514 can be driven to move up and down. The second rotating disk 514 drives the third sliding sleeve 518 to slide on the outer wall of the second vertical rod 517. The up and down movement of the second rotating disk 514 can drive the connecting plate 515 to move up and down. When the connecting plate 515 moves up and down, it drives the second knocking rod 516 to move up and down. The up and down movement of the second knocking rod 516 can knock the blanking plate 7 to avoid the accumulation of sand and gravel on the blanking plate 7, which makes it difficult to unload.

[0028] See also Figure 1-7On the basis of the above embodiment, in another embodiment of the present invention, the crushing mechanism 6 includes a fifth rotating rod 611, the fifth rotating rod 611 is rotatably connected to the inner wall of the screening box 1 through a bearing, the fifth rotating rod 611 movably penetrates the screening box 1 and extends outward, the outer wall of the fifth rotating rod 611 is fixedly connected to the third gear 612, the fifth rotating rod 611 is provided to drive the third gear 612 to rotate, the fifth rotating rod 611 is connected to the first rotating rod 412 through a pulley group, the first rotating rod 412 is provided to drive the fifth rotating rod 611 to rotate, the outer wall of the fifth rotating rod 611 is fixedly connected to the first crushing roller 613, the fifth rotating rod 611 is provided to drive the first crushing roller 613 to rotate, and the first crushing roller 613 is provided to crush the sand The inner wall of the screening box 1 is rotatably connected with the sixth rotating rod 614 through a bearing, the sixth rotating rod 614 movably penetrates the screening box 1 and extends to the outside thereof, the outer wall of the sixth rotating rod 614 is fixedly connected with the second crushing roller 616, the sixth rotating rod 614 is provided to drive the second crushing roller 616 and the fourth gear 615 to rotate, the outer wall of the sixth rotating rod 614 is fixedly connected with the fourth gear 615, the third gear 612 is meshed with the fourth gear 615, the third gear 612 is provided to drive the fourth gear 615 to rotate, the second crushing roller 616 is provided to crush the sand and gravel, the first crushing roller 613 and the second crushing roller 616 are used to crush the sand and gravel, and the large sand and gravel can be preliminarily crushed.

[0029] Working principle: when the first rotating rod 412 rotates, the fifth rotating rod 611 is driven to rotate through the pulley group, and when the fifth rotating rod 611 rotates, it drives the third gear 612 to rotate, and when the fifth rotating rod 611 rotates, it drives the first crushing roller 613 to rotate, and when the third gear 612 rotates, it drives the fourth gear 615 to rotate, and when the fourth gear 615 rotates, it drives the sixth rotating rod 614 to rotate, and when the sixth rotating rod 614 rotates, it drives the second crushing roller 616 to rotate. The first crushing roller 613 and the second crushing roller 616 are used to crush sand and gravel, and large sand and gravel can be preliminarily crushed.

[0030] See also Figure 1-7 On the basis of the above embodiment, in another embodiment of the present invention, the dust removal mechanism 8 includes a second vertical plate 811, the second vertical plate 811 is fixedly connected to the bottom of the first screen plate 417, and the front of the first screen plate 417 is fixedly connected to the first dust collector 812 and the second dust collector 813. The dust can be adsorbed by the first dust collector 812 and the second dust collector 813 to achieve dust reduction treatment. The bottom of the screening box 1 is fixedly connected to a support leg 9, and the support leg 9 is provided to support the screening box 1. The number of the support legs 9 is four, and the four support legs 9 are fixedly connected around the bottom of the screening box 1. A conveyor crawler 10 is provided on the right side of the screening box 1, and the conveyor crawler 10 is provided to transport sand and gravel.

[0031] Working principle: The left and right movement of the first screen plate 417 can drive the second vertical plate 811 to move left and right. When the second vertical plate 811 moves, it drives the first vacuum cleaner 812 and the second vacuum cleaner 813 to move. The first vacuum cleaner 812 and the second vacuum cleaner 813 can absorb dust to achieve dust reduction treatment.

[0032] The present invention provides a crawler-type sand and gravel screening machine for dry sand making. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A crawler-type sand and gravel screening machine for dry sand making, comprising a screening box (1), characterized in that: The front of the screening box (1) is provided with a box door (2); the back of the screening box (1) is fixedly connected with an L-shaped plate (3); a screening mechanism (4), a material discharge mechanism (5), and a dust removal mechanism (8) are arranged inside the screening box (1); a material discharge plate (7) is fixedly connected inside the screening box (1); the material discharge plate (7) is arranged in an inclined manner, with the left side higher than the right side; The screening mechanism (4) comprises a motor (411) and a first rotating rod (412), wherein the motor (411) is fixedly connected to the front side of the L-shaped plate (3), the first rotating rod (412) is fixedly connected to the output end of the motor (411) via a coupling, the end of the first rotating rod (412) away from the motor (411) is fixedly connected to a first connecting rod (413), the front side of the first connecting rod (413) is rotatably connected to a second connecting rod (414), the interior of the screening box (1) is fixedly connected to a fixed rod (415), the outer wall of the fixed rod (415) is sleeved with a first sliding sleeve (416), the back of the first sliding sleeve (416) is fixedly connected to a first screen plate (417), the top of the first screen plate (417) is fixedly connected to a first vertical plate, and the end of the second connecting rod (414) away from the first connecting rod (413) is rotatably connected to the back of the first vertical plate.

2. The crawler-type sand and gravel screening machine for dry sand making according to claim 1 is characterized in that: A first vertical rod (425) is fixedly connected to the inner bottom side of the screening box (1); a spring (427) is sleeved on the outer wall of the first vertical rod (425); a second sliding sleeve (426) is sleeved on the outer wall of the first vertical rod (425); the spring (427) is arranged between the bottom of the second sliding sleeve (426) and the inner top of the screening box (1); and a second screen plate (428) is fixedly connected to the back of the second sliding sleeve (426).

3. The crawler-type sand and gravel screening machine for dry sand making according to claim 2 is characterized in that: A fixed plate is fixedly connected to the left side of the screening box (1); a second rotating rod (419) is rotatably connected to the top of the fixed plate via a bearing; a first reciprocating screw rod (420) is fixedly connected to the top of the second rotating rod (419); a first thread sleeve (422) is slidably connected to the outer wall of the first reciprocating screw rod (420); a first knocking rod (423) is fixedly connected to the top of the first thread sleeve (422); a limiting block (424) is fixedly connected to the front side of the first thread sleeve (422); and the limiting block (424) is slidably connected to the inner wall of the slide groove.

4. The crawler-type sand and gravel screening machine for dry sand making according to claim 3 is characterized in that: A third rotating rod (421) is fixedly connected to the top of the first reciprocating screw rod (420); a second bevel gear (429) is provided on the outer wall fixed sleeve of the third rotating rod (421); a first bevel gear (418) is provided on the outer wall fixed sleeve of the first rotating rod (412); the first bevel gear (418) is meshed with the second bevel gear (429).

5. The crawler-type sand and gravel screening machine for dry sand making according to claim 4 is characterized in that: The unloading mechanism (5) comprises a fourth rotating rod (511), the fourth rotating rod (511) being rotatably connected to the bottom side of the inner wall of the screening box (1) via a bearing, the fourth rotating rod (511) being connected to the second rotating rod (419) via a belt pulley group, the top of the fourth rotating rod (511) being fixedly connected to the first rotating disk (512), the top of the first rotating disk (512) being rotatably connected to the third connecting rod (513) via a ball, the end of the third connecting rod (513) away from the first rotating disk (512) being rotatably connected to the second rotating disk (514) via a ball, the top of the second rotating disk (514) being fixedly connected to a connecting plate (515), and the top of the connecting plate (515) being fixedly connected to a second knocking rod (516).

6. The crawler-type sand and gravel screening machine for dry sand making according to claim 5 is characterized in that: A second vertical rod (517) is fixedly connected to the inner bottom side of the screening box (1); a third sliding sleeve (518) is sleeved on the outer wall of the second vertical rod (517); and the third sliding sleeve (518) is fixedly connected to the front side of the second rotating disk (514).

7. The crawler-type sand and gravel screening machine for dry sand making according to claim 6 is characterized in that: The crushing mechanism (6) comprises a fifth rotating rod (611), the fifth rotating rod (611) being rotatably connected to the inner wall of the screening box (1) via a bearing, the fifth rotating rod (611) movably passing through the screening box (1) and extending outward, the outer wall of the fifth rotating rod (611) being fixedly connected to a third gear (612), the fifth rotating rod (611) being transmission-connected to the first rotating rod (412) via a pulley group, and the outer wall of the fifth rotating rod (611) being fixedly connected to a first crushing roller (613).

8. The crawler-type sand and gravel screening machine for dry sand making according to claim 7 is characterized in that: The inner wall of the screening box (1) is rotatably connected to a sixth rotating rod (614) via a bearing; the sixth rotating rod (614) movably passes through the screening box (1) and extends to the outside thereof; the outer wall of the sixth rotating rod (614) is fixedly connected to a second crushing roller (616); the outer wall of the sixth rotating rod (614) is fixedly connected to a fourth gear (615); and the third gear (612) is meshed with the fourth gear (615).

9. The crawler-type sand and gravel screening machine for dry sand making according to claim 8, characterized in that: The dust removal mechanism (8) comprises a second vertical plate (811), the second vertical plate (811) being fixedly connected to the bottom of the first sieve plate (417), and the front of the first sieve plate (417) being fixedly connected to a first dust collector (812) and a second dust collector (813).

10. The crawler-type sand and gravel screening machine for dry sand making according to claim 9, characterized in that: The bottom of the screening box (1) is fixedly connected to a support leg (9), the number of the support legs (9) being four, and the four support legs (9) are fixedly connected around the bottom of the screening box (1), and a conveyor crawler (10) is arranged on the right side of the screening box (1).

Images